CN108506403B - Large-scale hydraulic damper - Google Patents
Large-scale hydraulic damper Download PDFInfo
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- CN108506403B CN108506403B CN201810347153.1A CN201810347153A CN108506403B CN 108506403 B CN108506403 B CN 108506403B CN 201810347153 A CN201810347153 A CN 201810347153A CN 108506403 B CN108506403 B CN 108506403B
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- temperature compensation
- piston rod
- damper
- piston
- flow channel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/061—Mono-tubular units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/066—Units characterised by the partition, baffle or like element
- F16F9/067—Partitions of the piston type, e.g. sliding pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3221—Constructional features of piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
- F16F9/437—Drainage arrangements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention provides a large hydraulic damper, which comprises a right pin head, a right end cover, a cylinder body, a piston assembly, a piston rod, a left end cover, a left pin head, a plug, an oil filling hole, an auxiliary piston rod and a temperature compensation device, wherein the device adopts a mode of matching a damping flow channel and a first flow channel to realize low-speed friction resistance and quick locking performance of the damper, simultaneously, the outer diameters of the auxiliary piston rod and the piston rod are the same, so that the volumes of oil liquid changes on the left side and the right side of the damper are the same, the arrangement of an auxiliary oil tank of the damper is reduced, the overall dimension of the damper is reduced, a temperature compensation cavity is formed by the temperature compensation device to be used for containing and supplementing the change of the volume of the oil liquid when the temperature changes, the working performance of the damper is prevented from being influenced by the temperature changes, the temperature compensation device is positioned in an inner hole of, the product quality is guaranteed, and the reliability of the product is improved.
Description
Technical Field
The invention relates to the technical field of dampers, in particular to a large hydraulic damper.
Background
At present, the hydraulic damper is widely applied to the field of vibration resistance and shock absorption, and for a common hydraulic damper, the structural size of the hydraulic damper is relatively small, or the installation space is not limited. In some special occasions, such as a large hydraulic damper for nuclear power main equipment, which is installed inside a nuclear island and has a small installation space, the requirement on the structural size of the damper is very strict, for example, patent "CN 2651560" discloses a hydraulic damper for a nuclear power station, which mainly comprises an oil storage piston, a main cylinder, a piston rod, a bearing coupling head, a front seat cover and a rear seat cover, an oil storage cylinder is arranged on the outer layer of the damping main cylinder, two sides of the piston of the main cylinder form two working chambers, a main control valve for controlling the communication and locking of oil on two sides of the piston is arranged in the middle of the piston rod, and an auxiliary control valve for communicating the main cylinder and the oil storage cylinder is arranged between the oil storage cylinder and the main cylinder; the front of the oil storage piston is connected with the auxiliary control valve through a pipeline, the rear of the oil storage piston is provided with a pressure spring, and the main control valve and the auxiliary control valve of the elastic oil storage structure and the cone valve structure can automatically compensate for the vibration resistance when the pipeline system is impacted by an earthquake and a water loss accident of a main factory building of a nuclear power station due to the volume change of oil in the damper with asymmetric volumes of oil cavities at two sides of the piston in the damping oil cylinder; however, in the existing damper, because the volumes of the oil chambers on the two sides of the piston are asymmetric, an auxiliary oil storage structure is required to be configured for accommodating redundant oil generated when the damper works, so that the appearance size of the damper is larger, the installation space of the damper is required to be special, and the properties of the damper in two directions of tension and compression are inconsistent due to the inconsistent volumes of the oil chambers on the two sides of the piston, so that the service life of the large damper and the safety of nuclear power main equipment are seriously influenced.
Disclosure of Invention
In order to overcome the following problems in the prior art: the existing damper needs to be provided with an auxiliary damper oil storage structure for containing redundant oil generated when the damper works due to the asymmetrical volumes of oil cavities on two sides of a piston, so that the appearance size of the damper is larger, the installation space of the damper has special requirements, the performances of the damper in two directions of tension and compression are inconsistent due to the inconsistent volumes of the oil cavities on two sides of the piston, and the service life of a large damper and the safety of nuclear power main equipment are seriously influenced; the invention provides a large hydraulic damper, which is characterized in that: comprises a right pin head, a right end cover, a cylinder body, a piston assembly, a piston rod, a left end cover, a left pin head, an auxiliary piston rod and a temperature compensation device, the right pin head is positioned on the right side of the right end cover, the left pin head is positioned on the left side of the piston rod, a cylindrical cylinder barrel inner hole is formed in the right end cover, the cylinder body and the left end cover, the piston assembly is positioned in the inner hole of the cylinder barrel, the piston assembly divides the inner hole of the cylinder barrel into a left damper working cavity and a right damper working cavity, a damping flow passage (4-4) and a first flow passage are arranged between the left working cavity and the right working cavity of the damper, the left ends of the damping flow channel and the first flow channel are communicated with the left working cavity of the damper, the right ends of the damping flow channel and the first flow channel are communicated with the right working cavity of the damper, and the first flow channel comprises a first one-way valve and a second one-way valve; the piston rod is connected with the piston assembly, and the left end of the piston rod penetrates through the left end cover to drive the piston assembly to move back and forth; a cylindrical piston inner hole is formed in the middle of the right side of the piston assembly, the auxiliary piston rod is located in the piston inner hole, and the outer diameter of the auxiliary piston rod is the same as that of the piston rod; a cylindrical auxiliary piston rod inner hole is processed in the left side of the auxiliary piston rod, the temperature compensation device is positioned in the auxiliary piston rod inner hole and comprises a spring, an end head and a temperature compensation piston, the temperature compensation piston is positioned in the auxiliary piston rod inner hole and divides the auxiliary piston rod inner hole into a left cavity and a right cavity, the right cavity is a temperature compensation cavity, and the left cavity is an installation cavity; the end head is fixedly arranged at the left end part of the inner hole of the auxiliary piston rod, and the spring is positioned between the end head and the temperature compensation piston and drives the temperature compensation piston to move so as to change the volume of the temperature compensation cavity; the bottom of the right side of the inner hole of the auxiliary piston rod is provided with a temperature compensation damping micropore, one end of the temperature compensation damping micropore is communicated with the temperature compensation cavity, the other end of the temperature compensation damping micropore is communicated with the right working cavity of the damper, and oil enters the temperature compensation cavity through the temperature compensation damping micropore; the temperature compensation check valve is installed to auxiliary piston rod hole right side bottom, the import and the temperature compensation chamber of temperature compensation check valve are linked together, the export and the right working chamber of attenuator of temperature compensation check valve are linked together, and fluid enters into the right working chamber of attenuator through the temperature compensation check valve.
On the basis, a guide device and a sealing device are arranged between the outer wall of the temperature compensation piston and the inner hole of the auxiliary piston rod, and the outer wall of the temperature compensation piston and the inner hole of the auxiliary piston rod form sliding fit.
On the basis, a compensation piston cylindrical hole is formed in the middle of the right side of the temperature compensation piston, and the compensation piston cylindrical hole is communicated with the temperature compensation damping micro hole and the temperature compensation check valve.
On the basis, a spring seat hole is formed in the middle of the left side of the temperature compensation piston, a spring mounting boss is machined on the right side of the end head, the left portion of the spring is sleeved on the spring mounting boss, and the right portion of the spring is located in the spring seat hole and tightly abuts against the spring seat hole.
On this basis, the end includes the air vent, the air vent is arranged along the end axial, two terminal surfaces of end that link up, installation cavity is connected to air vent one end, and the piston hole is connected to the other end.
On the basis, the damping flow passage and the first flow passage are positioned on the piston assembly and are arranged along the axial direction of the piston assembly; the damping flow channel is a flow channel which is directly communicated in the axial direction, or the damping flow channel is a flow channel which is spirally communicated in the axial direction, or the damping flow channel is a flow channel which is combined by directly communicating in the axial direction and spirally communicating in the axial direction.
On the basis, the cylinder body is characterized by further comprising a channel, wherein the channel is located outside the cylinder body, the damping flow channel and the first flow channel are located on the channel, a first channel and a second channel are arranged at two ends of the cylinder body along the radial direction and penetrate through the cylinder body, the first channel is communicated with the damping flow channel and the left end of the first flow channel, and the second channel is communicated with the damping flow channel and the right end of the first flow channel; the damping flow channel is a flow channel which is directly communicated in the axial direction, or the damping flow channel is a flow channel which is spirally communicated in the axial direction, or the damping flow channel is a flow channel which is combined by directly communicating in the axial direction and spirally communicating in the axial direction.
On this basis, the auxiliary piston rod is fastened and installed on the right end cover through a screw, or the auxiliary piston rod, the right pin head and the right end cover are integrally formed.
On the basis, the left end cover and the cylinder body are tightly installed together, or the left end cover and the cylinder body are integrally formed.
On the basis, the right pin head, the right end cover and the cylinder body are integrally formed, or the right pin head, the right end cover and the cylinder body are tightly installed together.
Compared with the prior art, the invention has the beneficial effects that:
1. the device adopts a mode that the damping flow channel is matched with the first flow channel, so that the low-speed friction resistance and the quick locking performance of the damper are realized; meanwhile, the auxiliary piston rod and the piston rod are matched, the outer diameters of the auxiliary piston rod and the piston rod are the same, the volumes of oil liquid changes on the left side and the right side of the damper are the same, the arrangement of an auxiliary oil tank of the damper is reduced, the appearance size of the damper is reduced, and meanwhile, the symmetrical structures at the two ends are arranged, so that the performance of the damper in two directions of tension and compression is the same, the working performance of the damper is improved, the service life of the damper is prolonged, and the safety of nuclear power main equipment is improved.
2. This device adopts temperature compensation device to form the change of fluid volume when temperature compensation chamber is used for holding and replenishing the temperature variation, avoids the working property that the temperature variation influences the attenuator to inside being located auxiliary piston rod hole with temperature compensation device, having reduced attenuator overall dimension, simple structure, processing technology can be good, has ensured product quality, has improved the reliability of product.
3. The device exhausts the inner hole of the piston through the second vent hole and the first vent hole, and the vent holes of the end are matched, so that the damping effect of the damper is not influenced by the gas space formed when the auxiliary piston rod, the piston rod and the end are matched, the response speed of the damper is improved, and the smooth realization of the damping effect of the damper is ensured.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of embodiment 2 of the present invention;
FIG. 3 is a schematic structural view of embodiment 3 of the present invention;
in the figure: 1. the device comprises a right pin head, 2, a right end cover, 2-1, an auxiliary piston rod mounting hole, 3, a cylinder body, 3-1, a cylinder barrel inner hole, 3-4, a first channel, 3-5, a second channel, 4, a piston assembly I, 4-1, a piston inner hole, 4-2, a first one-way valve, 4-3, a second one-way valve, 4-4, a damping flow channel, 5, a piston rod, 5-1, a first vent hole, 5-2, a second vent hole, 6, a left end cover, 7, a left pin head, 8, a plug, 9, an oil filling hole, 10, an auxiliary piston rod, 10-1, an auxiliary piston rod inner hole, 10-3, a temperature compensation damping micropore, 10-4, a temperature compensation one-way valve, 10-5, a temperature compensation cavity, 10-6, a mounting cavity, 11, a screw, 12, a spring, 13, a spring, a piston rod, End head 13-1, vent hole 13-2, boss 14, temperature compensation piston 14-1, spring seat hole 14-2, compensation piston cylindrical hole 15, piston assembly II, piston assembly 20, channel A, left damper mounting hole B, right damper mounting hole C, left damper working cavity D, right damper working cavity D,
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
as shown in fig. 1, the present invention schematically illustrates a large hydraulic damper.
The invention discloses a large hydraulic damper, as shown in figure 1, comprising a right pin head 1, a right end cover 2, a cylinder body 3, a piston assembly I4, a piston rod 5, a left end cover 6, a left pin head 7, a plug 8, an oil filling hole 9, an auxiliary piston rod 10, a screw 11 and a temperature compensation device, wherein the right pin head 1 is positioned at the right side of the right end cover 2, the right pin head 1 is provided with a damper right mounting hole B, the left pin head 7 is positioned at the left side of the piston rod 5, the left pin head 7 and the piston rod 5 form a fastening connection, the left pin head 7 is provided with a damper left mounting hole A, the right pin head 1, the right end cover 2 and the cylinder body 3 are integrally formed, the left end cover 6 and the cylinder body 3 are fixedly installed together, a sealing device is installed between the left end cover 6 and the inner wall of the cylinder body 3, a cylindrical inner hole cylinder barrel 3-1 is processed in the cylinder body 3, the right, the first piston assembly 4 is positioned in the inner hole 3-1 of the cylinder barrel, a guide device and a sealing device are arranged between the first piston assembly 4 and the inner hole 3-1 of the cylinder barrel, the first piston assembly 4 and the inner hole 3-1 of the cylinder barrel form sliding fit, and the first piston assembly 4 divides the inner hole 3-1 of the cylinder barrel into a left damper working cavity C and a right damper working cavity D; the damping flow channel 4-4 and the first flow channel are axially arranged in the piston assembly I4 in a through mode, the left ends of the damping flow channel 4-4 and the first flow channel are communicated with the left damper working cavity C, the right ends of the damping flow channel 4-4 and the first flow channel are communicated with the right damper working cavity D, and the damping flow channel 4-4 is a flow channel which is axially directly communicated, and serves as an additional implementation mode of the embodiment: the damping flow channel 4-4 is a flow channel which is axially spirally communicated or a flow channel which is formed by combining axial direct communication and axial spiral communication; the first flow passage comprises a first one-way valve 4-2 and a second one-way valve 4-3, the first one-way valve 4-2 and the second one-way valve 4-3 are reverse normally-open type one-way valves with certain closing pressure, the first one-way valve 4-2 and the second one-way valve 4-3 are oppositely arranged, an outlet of the first one-way valve 4-2 is communicated with the left working cavity C of the damper, an outlet of the second one-way valve 4-3 is communicated with the right working cavity D of the damper, an oil inlet of the first one-way valve 4-2 is communicated with an inlet of the second one-way valve 4-3, when the damper works at low speed, the first one-way valve 4-2 and the second one-way valve 4-3 are opened, the damping flow passage 4-4 is simultaneously communicated with the first flow passage, and oil between the left working cavity C of the damper and the right working cavity D of the damper flows through the damping flow passage 4-4 and the first, the performance of low-speed friction resistance of the damper is realized; when the damper moves rapidly, the first check valve 4-2 or the second check valve 4-3 is closed to close the first flow passage, and oil between the left working cavity C and the right working cavity D of the damper flows through the damping flow passage 4-4, so that the rapid locking performance of the damper is realized; a cylindrical piston inner hole 4-1 is formed in the middle of the right side of the piston assembly I4, the left end of the auxiliary piston rod 10 is located in the piston inner hole 4-1, a guide device and a sealing device are installed between the auxiliary piston rod 10 and the piston inner hole 4-1, and the piston inner hole 4-1 and the outer wall of the left end of the auxiliary piston rod 10 are in sliding fit, so that a sealing cavity is formed; the right end of an auxiliary piston rod 10 is connected with a right end cover 2, an auxiliary piston rod mounting hole 2-1 is machined in the center of the left side of the right end cover 2, a sealing element is installed between the outer wall of the right end of the auxiliary piston rod 10 and the auxiliary piston rod mounting hole 2-1, a cylindrical auxiliary piston rod inner hole 10-1 is machined in the left side of the auxiliary piston rod 10, a plurality of axially-through screw mounting holes are machined in the right side of the auxiliary piston rod 10, screws 11 penetrate through the auxiliary piston rod inner hole 10-1, and the auxiliary piston rod 10 is fixedly mounted on the right end cover 2 through the screw mounting holes; the outer diameter of the auxiliary piston rod 10 is the same as that of the piston rod 5, so that the volumes of oil liquid changes at two sides of the left working cavity C and the right working cavity D of the damper are the same, the arrangement of an auxiliary oil tank of the damper is reduced, the appearance size of the damper is reduced, and meanwhile, the symmetrical structures at two ends are arranged, so that the performances of the damper in two directions of tension and compression are the same, the working performance of the damper is improved, and the service life of the damper is prolonged; the temperature compensation device is positioned in the inner hole 10-1 of the auxiliary piston rod and comprises a spring 12, a head 13 and a temperature compensation piston 14, the spring 12 is positioned between the head 13 and the temperature compensation piston 14, and is in a compression state, the temperature compensation piston 14 is positioned in the inner hole 10-1 of the auxiliary piston rod, a guide device and a sealing device are arranged between the outer wall of the temperature compensation piston 14 and the inner hole 10-1 of the auxiliary piston rod, the outer wall of the temperature compensation piston 14 and the inner hole 10-1 of the auxiliary piston rod form sliding fit, the inner hole 10-1 of the auxiliary piston rod is divided into a left chamber and a right chamber, the right chamber is a temperature compensation cavity 10-5, the left chamber is an installation cavity 10-6, the middle part of the left side of the left end surface of the temperature compensation piston 14 is provided with a spring seat hole 14-1, the middle part of the right side of the temperature compensation piston 14 is provided with a compensation piston cylindrical hole 14-2; the end head 13 is fixedly installed at the left end part of an inner hole 10-1 of the auxiliary piston rod through threads, a vent hole 13-1 penetrating through the front and the rear is axially arranged in the middle of the end head 13, one end of the vent hole 13-1 is connected with the installation cavity 10-6, the other end of the vent hole is connected with a piston inner hole 4-1, the influence of gas in the installation cavity 10-6 on the movement of the temperature compensation piston 14 is avoided, a spring installation boss 13-2 is processed on the right side of the end head 13, the left part of the spring 12 is sleeved on the spring installation boss 13-2 and used for positioning the spring 12, the spring 12 is located between the end head 13 and the temperature compensation piston 14 and is in a compression state, and the temperature compensation piston 14 is driven to move left; the bottom of the right side of an inner hole 10-1 of the auxiliary piston rod is provided with a temperature compensation damping micropore 10-3, one end of the temperature compensation damping micropore 10-3 is communicated with a temperature compensation cavity 10-5, the other end of the temperature compensation damping micropore is communicated with a right working cavity D of the damper, when the temperature of the damper rises, the volumes of oil in the left working cavity C of the damper and the right working cavity D of the damper are increased, and the oil enters the temperature compensation cavity 10-5 through the temperature compensation damping micropore 10-3; the bottom of the right side of an inner hole 10-1 of the auxiliary piston rod is provided with a temperature compensation check valve 10-4, the inlet of the temperature compensation check valve 10-4 is communicated with a temperature compensation cavity 10-5, the outlet of the temperature compensation check valve 10-4 is communicated with a right working cavity D of the damper, when the temperature of the damper is reduced, oil rapidly enters the right working cavity D of the damper through the temperature compensation check valve 10-4, the reduction of the oil in the right working cavity D of the damper is compensated, the temperature compensation damping micropores 10-3 and the temperature compensation check valve 10-4 are communicated with a cylindrical hole 14-2 of the compensation piston, the temperature compensation damping micropores 10-3 and the temperature compensation check valve 10-4 are prevented from being separated when the temperature compensation piston 14 is positioned at the right end, the area of the oil at the right end of the temperature compensation piston 14 is increased, and the pressure of a system during, the realization of the temperature compensation function is ensured; the piston rod 5 penetrates through the left end cover 6 to be connected with the piston assembly I4 to drive the piston assembly I4 to move back and forth, the piston assembly I4 and the piston rod 5 are integrally formed, a first vent hole 5-1 which is radially communicated is processed at the left end of the piston rod 5, a second vent hole 5-2 is axially processed in the middle of the interior of the piston rod 5, the left end of the second vent hole 5-2 is communicated with the first vent hole 5-1, the right end of the second vent hole 5-2 is communicated with the inner hole 4-1 of the piston, the inner hole 4-1 of the piston is communicated with the atmosphere through the second vent hole 5-2 and the first vent hole 5-1, therefore, the gas space formed when the auxiliary piston rod 10, the piston rod 5 and the temperature compensation piston 14 are matched does not influence the damping effect of the damper, the response speed of the damper is improved, and the smooth realization of the damping effect of the damper is ensured; a guide device, a sealing device and a dustproof device are arranged between the left end cover 6 and the outer wall of the piston rod 5, and the left end cover 6 and the outer wall of the piston rod 5 are in sliding fit, so that the sealing property of the left working cavity C of the damper is ensured; an oil filling hole 9 is axially communicated with the left end cover 6, after the damper is filled with oil, a plug 8 and a related sealing element are installed in the oil filling hole 9 to plug the oil filling hole 9, and the left damper working cavity C, the right damper working cavity D, the temperature compensation cavity 10-5 and related spaces and channels communicated with the temperature compensation cavity are filled with working oil.
The working principle is as follows:
when the left pin head 7 moves relative to the right pin head 1, the right pin head 1 drives the piston rod 5 and the piston assembly 4 to move. In the low-speed motion state of the hydraulic damper, a flow gap is reserved between the valve core and the valve seat of the first check valve 4-2 and the second check valve 4-3. At the moment, working oil in the hydraulic damper flows into the other working cavity of the damper through the second check valve 4-3 and the first check valve 4-2 on one hand; on the other hand, the working fluid flows into the other working cavity of the damper through the damping flow passage 4-4, and because the flow passage of the working fluid is large, the working fluid forms very small pressure loss in the process of flowing between the working cavities of the hydraulic damper, and the damper forms very small resistance to external equipment, thereby meeting the performance requirement of low-speed friction resistance of the damper; in the rapid movement state of the hydraulic damper, the first check valve 4-2 or the second check valve 4-3 is locked, at the moment, the working oil in the working cavity of the hydraulic damper can only flow into the other working cavity of the damper through the damping flow channel 4-4, when the working oil passes through the damping flow channel 4-4, a large pressure loss is formed, a damping effect is generated, the large-scale hydraulic damper provides a large resistance to external equipment, the requirement of the locking performance of the damper is met, and the safety of the external equipment is effectively protected. Meanwhile, relative motion is generated between the first piston assembly 4 and the auxiliary piston rod 10, and the piston inner hole 4-1 and the auxiliary piston rod inner hole 10-1 are discharged or sucked into the atmosphere through the second vent hole 5-2 and the first vent hole 5-1, so that the related performance of the large hydraulic damper is effectively guaranteed.
Because the outer diameter of the auxiliary piston rod 10 is the same as that of the piston rod 5, the volume change of the right working cavity D is the same as that of the left working cavity C of the hydraulic damper in the working process of the damper, the volume change problem of a single-piston-rod damper is avoided, the arrangement of an auxiliary oil tank of the damper is reduced, and meanwhile, the consistency of the two directional performances of the tension and compression of the large hydraulic damper is better.
When the environmental temperature changes, if the environmental temperature rises, the temperature of working oil in the left working chamber and the right working chamber of the large hydraulic damper rises, the pressure rises, the working oil in the right working chamber D can slowly enter the temperature compensation chamber 10-5 through the temperature compensation damping micropores 10-3, the temperature compensation piston 14 is pushed to overcome the pre-pressure of the spring 12 and move leftwards, the volume of the temperature compensation chamber 10-5 is increased, and the increase of the internal pressure of the damper caused by the rise of the environmental temperature in the working chambers is avoided; if the environmental temperature is reduced, the temperature of working oil in the left working cavity and the right working cavity of the large hydraulic damper is reduced, certain vacuum is generated in the working cavities, the spring 12 pushes the temperature compensation piston 14 to move rightwards, the oil in the temperature compensation cavity 10-5 quickly enters the right working cavity D through the temperature compensation check valve 10-4, and the vacuum generated in the damper due to the reduction of the environmental temperature of the working cavities is improved; when the large hydraulic damper normally works, if the right working cavity D is in a high-pressure state, a small part of working oil in the right working cavity D can slowly enter the temperature compensation cavity 10-5 through the temperature compensation damping micropores 10-3, but because the oil passing capacity of the temperature compensation damping micropores 10-3 is extremely low, the amount of the oil entering the temperature compensation cavity 10-5 through the temperature compensation damping micropores 10-3 is extremely small, and when the right working cavity D is in a negative pressure state, the oil in the temperature compensation cavity 10-5 can quickly enter the right working cavity D through the temperature compensation check valve 10-4, so that the total amount balance of the working oil in the left working cavity and the right working cavity of the damper is kept, and the working performance of the large hydraulic damper is prevented from being influenced. Meanwhile, the installation cavity 10-6 is communicated with the inner hole 4-1 of the piston through the vent hole 13-1 to discharge or suck air, so that the compensation performance of the temperature compensation cavity 10-5 is effectively guaranteed.
Example 2:
different from example 1, the large hydraulic damper of the present embodiment includes, as shown in fig. 2, a right pin head 1, a right end cap 2, a cylinder 3, a piston assembly one 4, a piston rod 5, a left end cap 6, a left pin head 7, a plug 8, an oil filling hole 9, an auxiliary piston rod 10, and a temperature compensation device, wherein the right pin head 1, the right end cap 2, and the auxiliary piston rod 10 are integrally formed, the cylinder 3 and the left end cap 6 are integrally formed, and a sealing device is installed between the cylinder 3 and the right end cap 2; the auxiliary piston rod 10 and the right end cover 2 are integrally formed, so that the coaxiality between the piston rod 5 and the cylinder body 3 is improved, the installation quality of the damper is guaranteed, the installation efficiency of the damper is improved, and the service life of the damper is prolonged.
Example 3:
different from the embodiment 1, the large hydraulic damper of the present embodiment, as shown in fig. 3, includes a right pin head 1, a right end cover 2, a cylinder 3, a second piston assembly 15, a piston rod 5, a left end cover 6, a left pin head 7, a plug 8, an oil filling hole 9, an auxiliary piston rod 10, a screw 11, a temperature compensation device and a channel 20, the second piston assembly 15 and the piston rod 5 are integrally formed, the second piston assembly 15 is located inside a cylinder bore 3-1, a guide device and a sealing device are installed between the second piston assembly 15 and the cylinder bore 3-1, the second piston assembly 15 and the cylinder bore 3-1 form a sliding fit, the second piston assembly 15 divides the cylinder bore 3-1 into a damper left working chamber C and a damper right working chamber D, the channel 20 is located outside the cylinder 3, and includes a damping channel 4-4 and a first channel, the damping flow channel 4-4 and two end parts of the first flow channel are combined into a whole, a first channel 3-4 and a second channel 3-5 are arranged at two ends of the cylinder body 3 along the radial direction, the first channel 3-4 and the second channel 3-5 penetrate through the inside and outside of the cylinder body, the first channel 3-4 is communicated with the damping flow channel 4-4 and the left end of the first flow channel, and the second channel 3-5 is communicated with the damping flow channel 4-4 and the right end of the first flow channel; the damping flow channel 4-4 and the first flow channel are arranged outside the channel 20, so that the damper is convenient to overhaul and maintain, the overhaul labor intensity is reduced, and the working efficiency is improved.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A large hydraulic damper is characterized by comprising a right pin head (1), a right end cover (2), a cylinder body (3), a piston assembly, a piston rod (5), a left end cover (6), a left pin head (7), an auxiliary piston rod (10) and a temperature compensation device, wherein the right pin head (1) is positioned on the right side of the right end cover (2), the left pin head (7) is positioned on the left side of the piston rod (5), a cylindrical cylinder inner hole (3-1) is formed inside the right end cover (2), the cylinder body (3) and the left end cover (6), the piston assembly is positioned inside the cylinder inner hole (3-1), the cylinder inner hole (3-1) is divided into a damper left working cavity (C) and a damper right working cavity (D) by the piston assembly, a damping flow passage (4-4) and a first flow passage are arranged between the damper left working cavity (C) and the damper right working cavity (D), the damping flow channel (4-4) and the first flow channel are positioned on the piston assembly and are arranged along the axial direction of the piston assembly, the damping flow channel (4-4) and the left end of the first flow channel are communicated with the left working cavity (C) of the damper, the damping flow channel (4-4) and the right end of the first flow channel are communicated with the right working cavity (D) of the damper, the first flow channel comprises a first check valve (4-2) and a second check valve (4-3), the first check valve (4-2) and the second check valve (4-3) are reverse normally-open check valves with certain closing pressure, and the first check valve (4-2) and the second check valve (4-3) are arranged oppositely; the piston rod (5) is connected with the piston assembly, and the left end of the piston rod (5) penetrates through the left end cover (6) to drive the piston assembly to move back and forth; a cylindrical piston inner hole (4-1) is formed in the middle of the right side of the piston assembly, the auxiliary piston rod (10) is located in the piston inner hole (4-1), and the outer diameter of the auxiliary piston rod (10) is the same as that of the piston rod (5); a cylindrical auxiliary piston rod inner hole (10-1) is formed in the left side of the auxiliary piston rod (10), the temperature compensation device is located in the auxiliary piston rod inner hole (10-1), the temperature compensation device comprises a spring (12), an end (13) and a temperature compensation piston (14), the temperature compensation piston (14) is located in the auxiliary piston rod inner hole (10-1), the auxiliary piston rod inner hole (10-1) is divided into a left cavity and a right cavity, the right cavity is a temperature compensation cavity (10-5), and the left cavity is an installation cavity (10-6); the end head (13) is fixedly arranged at the left end part of the inner hole (10-1) of the auxiliary piston rod, and the spring (12) is positioned between the end head (13) and the temperature compensation piston (14) and drives the temperature compensation piston (14) to move so as to change the volume of the temperature compensation cavity (10-5); a temperature compensation damping micropore (10-3) is formed in the bottom of the right side of the inner hole (10-1) of the auxiliary piston rod, one end of the temperature compensation damping micropore (10-3) is communicated with a temperature compensation cavity (10-5), the other end of the temperature compensation damping micropore is communicated with a right working cavity (D) of the damper, and oil enters the temperature compensation cavity (10-5) through the temperature compensation damping micropore (10-3); the bottom of the right side of the inner hole (10-1) of the auxiliary piston rod is provided with a temperature compensation check valve (10-4), the inlet of the temperature compensation check valve (10-4) is communicated with a temperature compensation cavity (10-5), the outlet of the temperature compensation check valve (10-4) is communicated with a right working cavity (D) of the damper, oil enters the right working cavity (D) of the damper through the temperature compensation check valve (10-4), the end head (13) comprises a vent hole (13-1), the vent hole (13-1) is axially arranged along the end head (13), two end faces of the communicated end head (13) are arranged, one end of the vent hole (13-1) is connected with the installation cavity (10-6), and the other end of the vent hole is connected with the inner hole (4-1) of the piston; the left end of the piston rod (5) is provided with a first vent hole (5-1) which is through in the radial direction, a second vent hole (5-2) is arranged inside the piston rod (5) along the axial direction, the left end of the second vent hole (5-2) is communicated with the first vent hole (5-1), the right end of the second vent hole (5-2) is communicated with a piston inner hole (4-1), and the piston inner hole (4-1) is communicated with the atmosphere through the second vent hole (5-2) and the first vent hole (5-1).
2. A large hydraulic damper according to claim 1, characterized in that: a guide device and a sealing device are arranged between the outer wall of the temperature compensation piston (14) and the inner hole (10-1) of the auxiliary piston rod, and the outer wall of the temperature compensation piston (14) and the inner hole (10-1) of the auxiliary piston rod form sliding fit.
3. A large hydraulic damper according to claim 1, characterized in that: and the middle part of the right side of the temperature compensation piston (14) is provided with a compensation piston cylindrical hole (14-2), and the compensation piston cylindrical hole (14-2) is communicated with the temperature compensation damping micropore (10-3) and the temperature compensation check valve (10-4).
4. A large hydraulic damper according to claim 1, characterized in that: the temperature compensation piston (14) is characterized in that a spring seat hole (14-1) is formed in the middle of the left side of the temperature compensation piston (14), a spring mounting boss (13-2) is machined on the right side of the end head (13), the left portion of the spring (12) is sleeved on the spring mounting boss (13-2), and the right portion of the spring (12) is located in the spring seat hole (14-1) and abuts against the spring seat hole (14-1).
5. A large hydraulic damper according to claim 1, characterized in that: the damping flow channel (4-4) is a flow channel which is directly communicated in the axial direction, or the damping flow channel (4-4) is a flow channel which is spirally communicated in the axial direction, or the damping flow channel (4-4) is a flow channel which is combined by directly communicating in the axial direction and spirally communicating in the axial direction.
6. A large hydraulic damper according to claim 1, characterized in that: the auxiliary piston rod (10) is fixedly installed on the right end cover (2) through a screw (11), or the auxiliary piston rod (10) is integrally formed with the right pin head (1) and the right end cover (2).
7. A large hydraulic damper according to claim 1, characterized in that: the left end cover (6) and the cylinder body (3) are tightly installed together, or the left end cover (6) and the cylinder body (3) are integrally formed.
8. A large hydraulic damper according to claim 1, characterized in that: the right pin head (1), the right end cover (2) and the cylinder body (3) are integrally formed, or the right pin head (1), the right end cover (2) and the cylinder body (3) are tightly installed together.
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| CN108645606B (en) * | 2018-05-11 | 2020-04-21 | 常州格林电力机械制造有限公司 | Test method and equipment for large hydraulic damper |
| CN111945919B (en) * | 2020-08-13 | 2021-07-16 | 钱子凡 | Curved surface runner viscous damper |
| CN112555325B (en) * | 2020-10-28 | 2022-11-18 | 中国船舶重工集团公司第七0九研究所 | Multidirectional damping controllable magneto-rheological shock absorber |
| CN113714733A (en) * | 2021-05-28 | 2021-11-30 | 中铁七局集团电务工程有限公司 | Production process of high-sealing pneumatic tension compensation device |
| CN113389829B (en) * | 2021-06-10 | 2022-09-30 | 徐州徐工矿业机械有限公司 | Mining dump truck and brake automatic compensator, brake and braking method thereof |
| CN116379098A (en) * | 2023-06-05 | 2023-07-04 | 江苏伊思灵双第弹簧有限公司 | Wave spring for preventing lateral movement and overload |
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| CN2182904Y (en) * | 1994-01-17 | 1994-11-16 | 颜家生 | Gas-liquid type shock-absorber |
| CN2651560Y (en) * | 2003-10-16 | 2004-10-27 | 上海理工大学附属工厂 | Hydraulic damper for nuclear power station |
| CN101408235A (en) * | 2007-10-08 | 2009-04-15 | 贺勍 | Novel adjustable vibration damper and follow-up damp-regulating volume control method |
| CN101818781B (en) * | 2009-12-29 | 2011-12-07 | 重庆仪表材料研究所 | Built-in bar-type magneto-rheological damper |
| CN202790294U (en) * | 2012-08-20 | 2013-03-13 | 成都市翻鑫家科技有限公司 | Piston-rod guided automobile shock absorber |
| CN204004139U (en) * | 2014-06-06 | 2014-12-10 | 李冠良 | The vibration damper with double-piston |
| DE102014116109A1 (en) * | 2014-11-05 | 2016-05-12 | Thyssenkrupp Ag | Shock absorber with a spring plate attached thereto and method for attaching a spring plate to a shock absorber |
| CN206092787U (en) * | 2016-08-26 | 2017-04-12 | 常州格林电力机械制造有限公司 | Marine automatic re -setting hydraulic damper |
| CN206072202U (en) * | 2016-08-31 | 2017-04-05 | 江苏朗域电力科技有限公司 | Hydraulic damper |
| JP6853637B2 (en) * | 2016-09-09 | 2021-03-31 | Ｋｙｂ株式会社 | Damping valve and cylinder device |
| CN206290637U (en) * | 2016-11-30 | 2017-06-30 | 江西洪都航空工业集团有限责任公司 | A kind of two-stage vent plug formula buffer |
| CN106678245B (en) * | 2017-02-06 | 2018-07-03 | 常州格林电力机械制造有限公司 | A kind of hydraulic damper with stiffness tuning function |
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