CN118564587A - Displacement amplification type viscous damper - Google Patents

Displacement amplification type viscous damper Download PDF

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Publication number
CN118564587A
CN118564587A CN202410741179.XA CN202410741179A CN118564587A CN 118564587 A CN118564587 A CN 118564587A CN 202410741179 A CN202410741179 A CN 202410741179A CN 118564587 A CN118564587 A CN 118564587A
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CN
China
Prior art keywords
cavity
cylinder barrel
chamber
main
piston rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410741179.XA
Other languages
Chinese (zh)
Inventor
任靖哲
温四清
李治
潘毅
黄细军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CITIC General Institute of Architectural Design and Research Co Ltd
Original Assignee
CITIC General Institute of Architectural Design and Research Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CITIC General Institute of Architectural Design and Research Co Ltd filed Critical CITIC General Institute of Architectural Design and Research Co Ltd
Priority to CN202410741179.XA priority Critical patent/CN118564587A/en
Publication of CN118564587A publication Critical patent/CN118564587A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16F9/30—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium
    • 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
    • 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
    • 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
    • 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
    • F16F9/3235—Constructional features of cylinders
    • 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
    • F16F9/36—Special sealings, including sealings or guides for piston-rods

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The application relates to a displacement amplification type viscous damper, comprising: a cylinder barrel including a main chamber and a sub-chamber, the main chamber having a larger diameter than the sub-chamber; the driving piston and the driven piston are arranged in the auxiliary cavity, the cylinder barrel is divided into a first cavity, a second cavity and a third cavity by the driven piston and the driving piston, and the driving piston and the driven piston can move along the axial direction of the cylinder barrel; the input piston rod is arranged in the main cavity, is coaxial with the cylinder barrel and is fixed with the driving piston, and one end of the input piston rod penetrates out of the cylinder barrel and can move along the axial direction; the two ends of the oil guide pipe are respectively communicated with the first chamber and the third chamber; the third chamber is internally provided with a damping block, the damping block is provided with an orifice, the chambers at two sides of the damping block are communicated through the orifice in the axial direction of the cylinder barrel, and the oil guide pipe is communicated with the third chamber at one side of the damping block far away from the passive piston. The damper is more sensitive to small displacement, can still generate enough damping force to dissipate energy when the structural deformation is smaller, and has high damping efficiency.

Description

Displacement amplification type viscous damper
Technical Field
The invention relates to the field of building damping technology, in particular to a displacement amplification type viscous damper.
Background
The viscous damper is manufactured according to the principle that throttling resistance is generated when fluid moves, particularly when the fluid passes through a throttling hole, and is a damper related to the movement speed of a piston, and the viscous damper is widely applied to damping designs of multiple high-rise buildings in high-intensity areas and earthquake important monitoring areas.
The traditional viscous damper is insensitive to small displacement, the energy consumption capability of the structure during small deformation is inconsistent with design expectation, the integral shock resistance of a shock absorption structure provided with the viscous damper can not meet the standard requirement under the action of low intensity earthquake, and the installation of the viscous damper brings safety risks to the structural earthquake resistance.
Disclosure of Invention
Based on the above description, the invention provides a displacement amplification type viscous damper to solve the problems that the traditional viscous damper is insensitive to small displacement, the energy consumption capability of the traditional viscous damper is inconsistent with design expectation when the structure is deformed slightly, the integral shock resistance of a shock absorption structure for installing the viscous damper can not meet the standard requirement under the action of low intensity earthquake, and the installation of the viscous damper brings safety risk to the structural shock resistance.
The technical scheme for solving the technical problems is as follows:
the application provides a displacement amplification type viscous damper, which adopts the following technical scheme:
A displacement amplifying viscous damper comprising:
the cylinder barrel is sealed at two ends, damping medium is filled in an inner cavity of the cylinder barrel, the inner cavity of the cylinder barrel comprises a main cavity and a secondary cavity which are distributed along the axial direction and have different diameters, and the diameter of the main cavity is larger than that of the secondary cavity;
The driving piston is arranged in the main cavity, the driven piston is arranged in the auxiliary cavity, the inner cavity of the cylinder barrel is divided into a first cavity, a second cavity and a third cavity which are sequentially distributed along the axial direction and are not communicated with each other by the driving piston and the driving piston, the first cavity is positioned in the main cavity, the third cavity is positioned in the auxiliary cavity, and the driving piston and the driven piston can move relative to the cylinder barrel along the axial direction of the cylinder barrel;
The input piston rod is arranged in the main cavity and is coaxial with the cylinder barrel, the input piston rod is fixedly connected with the driving piston, one end of the input piston rod, which is far away from the auxiliary cavity, penetrates out of the cylinder barrel and is in sealing connection with the cylinder barrel, and the input piston rod can move relative to the cylinder barrel along the axial direction;
The oil guide pipe is arranged outside the cylinder barrel, and two ends of the oil guide pipe are respectively communicated with the first chamber and the third chamber;
The damping device comprises a cylinder barrel, a driven piston, a first chamber, a second chamber, a damping block, a cylinder barrel, an oil guide pipe, a damping medium, at least one damping block, an orifice, an oil guide pipe and an oil pipe, wherein the damping block is arranged in the third chamber, the orifice is used for allowing damping medium to pass through is arranged on the damping block, the chambers on two sides of the damping block are communicated through the orifice in the axial direction of the cylinder barrel, and the oil guide pipe is communicated with the third chamber on one side of the damping block, which is far away from the driven piston.
Preferably, two first guide sleeves respectively positioned in the main chamber and the auxiliary chamber are arranged in the second chamber, oil guide holes for damping medium to pass through are formed in the first guide sleeves, and the chambers on two sides of the first guide sleeves are communicated through the oil guide holes in the axial direction of the cylinder.
Preferably, the input piston rod passes through the first guide sleeve in the main chamber, and the input piston rod is axially movable relative to the first guide sleeve.
Preferably, a passive piston rod is arranged in the auxiliary chamber, the passive piston rod is coaxial with the cylinder barrel and fixedly connected with the passive piston, the passive piston rod penetrates through the damping block, and the passive piston rod can move axially relative to the damping block and is in sealing connection with the damping block.
Preferably, a second guide sleeve is arranged in the third chamber, the second guide sleeve is positioned on one side of the damping block away from the passive piston, the chambers on two sides of the second guide sleeve are not communicated with each other in the axial direction of the cylinder barrel, damping medium is not filled in the chamber on one side of the second guide sleeve away from the damping block, and the oil guide pipe is communicated with the third chamber between the second guide sleeve and the damping block.
Preferably, the passive piston rod passes through the second guide sleeve and extends into a cavity at one side of the second guide sleeve far away from the damping block, and the passive piston rod can move relative to the second guide sleeve along the axial direction and is in sealing connection with the second guide sleeve.
Preferably, the cylinder barrel comprises a first main cylinder barrel, a connecting cylinder barrel and a second main cylinder barrel which are coaxial and sequentially arranged along the axial direction, wherein two ends of the connecting cylinder barrel are respectively connected with the first main cylinder barrel and the second main cylinder barrel in a sealing manner, the main chamber is formed in the first main cylinder barrel, and the auxiliary chamber is formed in the second main cylinder barrel.
Preferably, the cylinder barrel further comprises an auxiliary cylinder barrel, the auxiliary cylinder barrel is coaxial with the second main cylinder barrel, one end of the auxiliary cylinder barrel is in sealing connection with one end, far away from the connecting cylinder barrel, of the second main cylinder barrel, and one end, far away from the second main cylinder barrel, of the auxiliary cylinder barrel is closed and connected with a joint bearing.
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
1. According to the application, the inner cavity of the cylinder barrel is provided with the main cavity and the auxiliary cavity with different diameters, the main cavity is internally provided with the active piston, the auxiliary cavity is internally provided with the passive piston, the inner wall of the cylinder barrel is divided into the first cavity, the second cavity and the third cavity by the active piston and the passive piston, the input piston rod is arranged in the main cavity, one end of the input piston rod penetrates out of the cylinder barrel, the input piston rod and the cylinder barrel are respectively connected with two parts of the damping structure which move relatively, when the structure vibrates, the input piston rod moves relatively to the cylinder barrel, when the input piston rod moves close to the passive piston rod, the damping medium pressure in the second cavity is increased, the damping medium pressure acts on the passive piston to enable the passive piston to move away from the active piston, the damping medium pressure in the third cavity is increased, damping medium between the passive piston and the damping block is driven to flow into the cavity at the other side of the damping block through the orifice, damping force is generated when the damping medium passes through the orifice to dissipate energy, the damping medium plays a damping effect, when the input piston rod moves relatively to the third cavity flows towards the first cavity at one side of the active piston far away from the passive piston, and when the input piston rod resets, the damping medium is reversely flowed and energy is dissipated again through the damping block; because the diameter of the main chamber is larger than that of the auxiliary chamber, when the driving piston moves along the axial direction, the damping medium drives the driven piston to move along the axial direction by a distance larger than that of the driving piston, namely, when the input piston rod moves by a smaller distance, the driven piston can also move by a larger distance, the moving distance of the driven piston is larger, the pressure of the damping medium between the driven piston and the damping block is larger, the flow speed of the damping medium passing through the orifice is faster, thereby generating larger damping force, enabling the damper to be more sensitive to small displacement, and still generating enough damping force to dissipate energy when the structural deformation is small and the moving distance of the input piston rod is smaller; meanwhile, for vibration with large structural deformation, the flow velocity of the damping medium passing through the throttling hole is faster to generate larger damping force, so that energy consumption is dissipated faster, the damping efficiency of the damper is improved, and the arrangement quantity of the damper can be reduced to meet the requirements of attractive construction and use functions;
2. According to the application, the first guide sleeve and the passive piston rod are arranged, the oil guide hole on the first guide sleeve is used for allowing damping medium to pass through so as to ensure that the damper works normally, and damping force can be generated when the damping medium passes through the oil guide hole, so that the damping efficiency of the damper is further improved, the first guide sleeve in the main chamber and the first guide sleeve in the auxiliary chamber respectively play a role in guiding the input piston rod and the passive piston rod, so that the movement stability of the active piston and the passive piston is improved through the guide effect of the input piston rod and the passive piston rod on the movement of the active piston and the passive piston respectively, and meanwhile, the passive piston rod occupies the inner volume of the cylinder barrel, so that the volume of the damping medium is reduced, the hydraulic pressure of the damping medium is larger when the active piston and the passive piston move, the flow velocity of the damping block is faster, the energy dissipation efficiency is higher, and the damping efficiency of the damper is higher.
Drawings
Fig. 1 is a schematic structural diagram of a displacement amplifying viscous damper according to an embodiment of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. A cylinder; 101. a first main cylinder; 102. the cylinder barrel is connected; 103. a second main cylinder; 1031. positioning holes; 104. an auxiliary cylinder; 2. a driving piston; 3. a passive piston; 4. an input piston rod; 5. an oil guide pipe; 6. a damping block; 7. a first guide sleeve; 8. a passive piston rod; 9. a second guide sleeve; 10. a knuckle bearing; a. a first chamber; b. a second chamber; c. and a third chamber.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that spatially relative terms, such as "under", "below", "beneath", "under", "above", "over" and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "below" and "under" may include both an upper and a lower orientation. Furthermore, the device may also include an additional orientation (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. In the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", and the like, if the connected circuits, modules, units, and the like have electrical or data transferred therebetween.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
Referring to fig. 1, the embodiment of the application provides a displacement amplification type viscous damper, which comprises a cylinder 1, an active piston 2, a passive piston 3, an input piston rod 4 and an oil guide pipe 5, wherein damping media are filled in inner cavities of the cylinder 1, the inner cavities of the cylinder 1 comprise a main cavity and an auxiliary cavity which are distributed along the axial direction and have different diameters, and the diameter of the main cavity is larger than that of the auxiliary cavity; the driving piston 2 is arranged in the main cavity, the driven piston 3 is arranged in the auxiliary cavity, the driven piston 3 and the driving piston 2 divide the inner cavity of the cylinder barrel 1 into a first cavity a, a second cavity b and a third cavity c which are distributed in sequence along the axial direction and are not communicated with each other, the first cavity a is positioned in the main cavity, the third cavity c is positioned in the auxiliary cavity, and the driving piston 2 and the driven piston 3 can move relative to the cylinder barrel 1 along the axial direction of the cylinder barrel 1; the input piston rod 4 is arranged in the main cavity and is coaxial with the cylinder 1, the input piston rod 4 is fixedly connected with the driving piston 2, one end, far away from the auxiliary cavity, of the input piston rod 4 penetrates out of the cylinder 1 and is in sealing connection with the cylinder 1, the input piston rod 4 can move relative to the cylinder 1 along the axial direction, and the oil guide pipe 5 is arranged outside the cylinder 1 and two ends of the oil guide pipe are respectively communicated with the first cavity a and the third cavity c.
Referring to fig. 1, specifically, a cylinder 1 includes a first main cylinder 101, a connecting cylinder 102, a second main cylinder 103 and an auxiliary cylinder 104 which are coaxially and sequentially arranged along an axial direction, two ends of the connecting cylinder 102 are respectively and hermetically connected with the first main cylinder 101 and the second main cylinder 103, one end of the auxiliary cylinder 104 is hermetically connected with one end of the second main cylinder 103, which is far away from the connecting cylinder 102, one end of the first main cylinder 101, which is far away from the connecting cylinder 102, and one end of the auxiliary cylinder 104, which is far away from the second main cylinder 103, are closed by an end cover, so that the first main cylinder 101, the connecting cylinder 102, the second main cylinder 103 and the auxiliary cylinder 104 are connected to form a closed cylinder 1; wherein, the first main cylinder 101 internal diameter is greater than the internal diameter of second main cylinder 103, form the main cavity in the first main cylinder 101, form the auxiliary chamber in the second main cylinder 103, then main cavity can the auxiliary chamber through connecting cylinder 102 intercommunication, in first main cylinder 101 was located to initiative piston 2, in the second main cylinder 103 was located to passive piston 3, the second cavity comprises connecting cylinder 102 interior wall and initiative piston 2 and the part main chamber and the part auxiliary chamber between the passive piston 3, and third cavity c comprises auxiliary cylinder 104 inner chamber and the part auxiliary chamber.
As shown in fig. 1, further, two first guide sleeves 7 respectively located in the main chamber and the auxiliary chamber are provided in the second chamber b, oil holes through which damping medium passes are provided in the first guide sleeves 7, the chambers on both sides of the first guide sleeves 7 are communicated through the oil holes in the axial direction of the cylinder barrel 1, and the input piston rod 4 passes through the first guide sleeves 7 in the main chamber, and the input piston rod 4 can move relative to the first guide sleeves 7 in the axial direction. The two first guide sleeves 7 are fixed with the cylinder barrel 1 and are used for the damping medium to pass through, the first guide sleeves 7 in the main cavity play a role in guiding the input piston rod 4 so as to ensure the running stability of the input piston rod 4 and the driving piston 2, and meanwhile, the damping medium can also generate damping force to play a role in dissipating energy when passing through the oil guide holes in the first guide sleeves 7, so that the damping efficiency of the damper is further improved.
Further, as shown in fig. 1, a passive piston rod 8 is disposed in the auxiliary chamber, the passive piston rod 8 is coaxial with the cylinder 1 and fixedly connected with the passive piston 3, the passive piston rod 8 passes through the damping block 6, and the passive piston rod 8 can move axially relative to the damping block 6 and is in sealing connection with the damping block 6. Specifically, the passive piston rod 8 sequentially passes through the first guide sleeve 7, the passive piston 3 and the damping block 6 in the auxiliary chamber, the passive piston rod 8 and the passive piston 3 are fixed, and meanwhile, the passive piston rod 8 can move and seal relative to the first guide sleeve 7 and the damping block 6 along the axial direction. On the one hand, the passive piston 3 is guided by the passive piston rod 8 to improve the running stability of the passive piston 3, and the other face passive piston rod 8 occupies the inner volume of the cylinder barrel 1, so that the damping medium is larger in hydraulic pressure when the active piston 2 and the passive piston 3 move, the flow speed passing through the damping block 6 is faster, the dissipation energy efficiency is higher, and the damping efficiency of the damper is higher.
As shown in fig. 1, a second guiding sleeve 9 is further arranged in the third chamber c, the second guiding sleeve 9 is positioned at one side of the damping block 6 away from the driven piston 3, the chambers at two sides of the second guiding sleeve 9 are not communicated with each other in the axial direction of the cylinder barrel 1, damping medium is not filled in the chamber at one side of the second guiding sleeve 9 away from the damping block 6, an oil guiding pipe 5 is communicated with the third chamber c between the second guiding sleeve 9 and the damping block 6, meanwhile, the driven piston rod 8 passes through the second guiding sleeve 9 and extends into the chamber at one side of the second guiding sleeve 9 away from the damping block 6, and the driven piston rod 8 can move relative to the second guiding sleeve 9 along the axial direction and is in sealing connection with the second guiding sleeve 9; specifically, the second guide sleeve 9 is arranged at one end of the second main cylinder 103 far away from the connecting cylinder 102 and is fixed with the second main cylinder 103, the second guide sleeve 9 separates the inner cavity of the second main cylinder 103 from the inner wall of the auxiliary cylinder 104, the driven piston rod 8 passes through the second guide sleeve 9 to extend into the inner cavity of the auxiliary cylinder 104, and the inner cavity of the auxiliary cylinder 104 is not filled with damping medium, so that enough space is provided for the axial movement of the driven piston rod 8.
Further, as shown in fig. 1, the end of the input piston rod 4 outside the cylinder 1 and the end of the auxiliary cylinder 104 away from the second main cylinder 103 are respectively connected with a knuckle bearing 10, so as to facilitate the installation of the damper and exert the shock absorbing effect thereof.
Further, as shown in fig. 1, during the production of the damper, the relative position of the passive piston 3 and the second main cylinder 103 needs to be kept in a set state, and since the passive piston rod 8 is not easily positioned inside the cylinder 1, a positioning hole 1031 is formed in a set position on the side wall of the second main cylinder 103, a matched positioning groove is formed correspondingly on the side wall of the passive piston 3, during the production of the damper, the passive piston 3 is moved to align with the positioning hole 1031 on the side wall of the second main cylinder 103, the passive piston 3 is positioned by inserting a positioning bolt into the positioning groove through the positioning hole 1031, after the damping medium is injected into the damper, the positioning bolt is taken out and replaced with a bolt with the same wall thickness as the second main cylinder 103 to be driven into the positioning hole 1031 to seal the positioning hole 1031, so that a sealed space is formed inside the cylinder 1, and simultaneously the passive piston 3 can axially move inside the cylinder 1 to realize the damping function.
The implementation principle of the application is as follows: the joint bearing 10 on the input piston rod 4 and the joint bearing 10 on the auxiliary cylinder 104 are respectively connected with two parts of the relative displacement of the structure when the damper is installed, the input piston rod 4 moves relative to the cylinder 1 when the structure vibrates under the action of earthquake, the damping medium pressure in the second chamber b is increased when the input piston rod 4 moves close to the passive piston rod 8, a certain damping force is generated when the damping medium in the second chamber b passes through the two first guide sleeves 7, and part of energy is dissipated to play a role in damping; the pressure of the damping medium in the second chamber b acts on the passive piston 3 to enable the passive piston 3 to move away from the active piston 2, so that the pressure of the damping medium in the third chamber c is increased, the damping medium between the passive piston 3 and the damping block 6 is driven to flow into the chamber on the other side of the damping block 6 through the orifice, damping force is generated to dissipate energy when the damping medium passes through the orifice, the damping medium plays a role in damping, and the damping medium flows into the first chamber a on one side, away from the passive piston 3, of the active piston 2 in the third chamber c through the oil guide pipe 5; when the input piston rod 4 moves away from the driven piston 3, the pressure of damping medium in the first chamber a is increased, the damping medium in the first chamber a flows into the third chamber c through the oil guide pipe 5 and passes through the damping block 6, the damping medium generates damping force dissipation energy through the damping block 6, the damping medium pressure acts on the driven piston 3 to enable the driven piston 3 to move close to the driving piston 2, and the driven piston 3 drives the damping medium in the second cavity to generate damping force dissipation energy through the two first guide sleeves 7, so that the damping function of the damper is realized.
Because the diameter of the main chamber is larger than that of the auxiliary chamber, when the driving piston 2 moves along the axial direction, the distance of driving the driven piston 3 to move along the axial direction by damping medium is larger than the moving distance of the driving piston 2, namely when the input piston rod 4 moves a smaller distance, the driven piston 3 can also move a larger distance, the moving distance of the driven piston 3 is larger, the damping medium pressure between the driven piston 3 and the damping block 6 is larger, the flow rate of the damping medium passing through the orifice is faster, thereby generating larger damping force, so that the damper is more sensitive to small displacement, and when the structural deformation is small, the input piston rod 4 moves a smaller distance, the damper still can generate enough damping force to dissipate energy; meanwhile, for vibration with large structural deformation, the flow velocity of the damping medium passing through the throttling hole is faster to generate larger damping force, so that energy consumption is dissipated faster, the damping efficiency of the damper is improved, and the arrangement quantity of the damper can be reduced to meet the requirements of attractive construction and use functions.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (8)

1. A displacement amplifying type viscous damper, comprising:
The cylinder barrel (1) is sealed at two ends, damping medium is filled in an inner cavity of the cylinder barrel (1), the inner cavity of the cylinder barrel (1) comprises a main cavity and a secondary cavity which are distributed along the axial direction and have different diameters, and the diameter of the main cavity is larger than that of the secondary cavity;
The driving piston (2) is arranged in the main cavity, the driven piston (3) and the driving piston (2) divide the inner cavity of the cylinder barrel (1) into a first cavity (a), a second cavity (b) and a third cavity (c) which are distributed in sequence along the axial direction and are not communicated with each other, the first cavity (a) is positioned in the main cavity, the third cavity (c) is positioned in the auxiliary cavity, and the driving piston (2) and the driven piston (3) can move relative to the cylinder barrel (1) along the axial direction of the cylinder barrel (1);
The input piston rod (4) is arranged in the main cavity and is coaxial with the cylinder barrel (1), the input piston rod (4) is fixedly connected with the driving piston (2), one end, far away from the auxiliary cavity, of the input piston rod (4) penetrates out of the cylinder barrel (1) and is in sealing connection with the cylinder barrel (1), and the input piston rod (4) can move relative to the cylinder barrel (1) along the axial direction;
An oil guide pipe (5) which is arranged outside the cylinder barrel (1) and two ends of which are respectively communicated with the first chamber (a) and the third chamber (c);
At least one damping block (6) is arranged in the third chamber (c), an orifice through which damping medium passes is arranged on the damping block (6), chambers on two sides of the damping block (6) are communicated through the orifice in the axial direction of the cylinder barrel (1), and the oil guide pipe (5) is communicated with the third chamber (c) on one side, away from the passive piston (3), of the damping block (6).
2. The displacement amplifying type viscous damper according to claim 1, wherein: two first guide sleeves (7) which are respectively positioned in the main chamber and the auxiliary chamber are arranged in the second chamber (b), oil guide holes through which damping media pass are formed in the first guide sleeves (7), the cylinder barrel (1) is axially arranged, and the chambers on two sides of the first guide sleeves (7) are communicated through the oil guide holes.
3. The displacement amplifying type viscous damper according to claim 2, wherein: the input piston rod (4) passes through the first guide sleeve (7) in the main chamber, and the input piston rod (4) can move relative to the first guide sleeve (7) along the axial direction.
4. The displacement amplifying type viscous damper according to claim 1, wherein: the auxiliary chamber is internally provided with a passive piston rod (8), the passive piston rod (8) is coaxial with the cylinder barrel (1) and fixedly connected with the passive piston (3), the passive piston rod (8) penetrates through the damping block (6), and the passive piston rod (8) can axially move relative to the damping block (6) and is in sealing connection with the damping block (6).
5. The displacement amplifying type viscous damper according to claim 4, wherein; be equipped with second uide bushing (9) in third cavity (c), second uide bushing (9) are located damping piece (6) are kept away from passive piston (3) one side cylinder (1) axial is upwards, second uide bushing (9) both sides cavity each other do not communicate, second uide bushing (9) are kept away from damping piece (6) one side cavity is interior not to fill damping medium, lead oil pipe (5) communicate in second uide bushing (9) with damping piece (6) between third cavity (c).
6. The displacement amplifying type viscous damper according to claim 5, wherein: the passive piston rod (8) penetrates through the second guide sleeve (9) and extends into a cavity at one side of the second guide sleeve (9) far away from the damping block (6), and the passive piston rod (8) can move relative to the second guide sleeve (9) along the axial direction and is in sealing connection with the second guide sleeve (9).
7. The displacement amplifying type viscous damper according to claim 1, wherein: the cylinder (1) comprises a first main cylinder (101), a connecting cylinder (102) and a second main cylinder (103) which are coaxial and sequentially arranged along the axial direction, wherein two ends of the connecting cylinder (102) are respectively connected with the first main cylinder (101) and the second main cylinder (103) in a sealing mode, the main chamber is formed in the first main cylinder (101), and the auxiliary chamber is formed in the second main cylinder (103).
8. The displacement amplifying type viscous damper according to claim 7, wherein: the cylinder barrel (1) further comprises an auxiliary cylinder barrel (104), the auxiliary cylinder barrel (104) is coaxial with the second main cylinder barrel (103), one end of the auxiliary cylinder barrel (104) is far away from the second main cylinder barrel (103) and is in sealing connection with one end of the connecting cylinder barrel (102), and one end of the auxiliary cylinder barrel (104) far away from the second main cylinder barrel (103) is sealed and connected with a joint bearing (10).
CN202410741179.XA 2024-06-11 2024-06-11 Displacement amplification type viscous damper Pending CN118564587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410741179.XA CN118564587A (en) 2024-06-11 2024-06-11 Displacement amplification type viscous damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410741179.XA CN118564587A (en) 2024-06-11 2024-06-11 Displacement amplification type viscous damper

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Publication Number Publication Date
CN118564587A true CN118564587A (en) 2024-08-30

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Family Applications (1)

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CN202410741179.XA Pending CN118564587A (en) 2024-06-11 2024-06-11 Displacement amplification type viscous damper

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