CN118457123A - Wheel type engineering machine and wheel load balancing method thereof - Google Patents
Wheel type engineering machine and wheel load balancing method thereof Download PDFInfo
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- CN118457123A CN118457123A CN202410704358.6A CN202410704358A CN118457123A CN 118457123 A CN118457123 A CN 118457123A CN 202410704358 A CN202410704358 A CN 202410704358A CN 118457123 A CN118457123 A CN 118457123A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 234
- 238000004891 communication Methods 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 45
- 239000010720 hydraulic oil Substances 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 24
- 238000010276 construction Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 5
- 238000013016 damping Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/056—Regulating distributors or valves for hydropneumatic systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a wheel type engineering machinery and a wheel load balancing method, wherein a suspension assembly comprises two suspension valve groups, the suspension valve groups comprise a pressure oil port and an oil return port, the suspension valve groups comprise suspension oil cylinders, the suspension valve groups further comprise a first control valve group, a pressure detector, an energy accumulator, a second control valve group and an overflow valve, the first control valve group is used for controlling the communication or disconnection between the first cavity and the pressure oil port and between the pressure oil port and the oil return port, the second control valve group of the first suspension valve group is connected with a pipeline between the energy accumulator and the overflow valve of the first suspension valve group and a second cavity of the suspension oil cylinder of the second suspension valve group, the second control valve group of the second suspension valve group is connected with a pipeline between the energy accumulator and the overflow valve of the second suspension valve group and a second cavity of the suspension oil cylinder of the first suspension valve group, and the suspension assembly further comprises a third control valve group, and the third control valve group is used for controlling the communication or disconnection between the energy accumulator of the first suspension valve group and the second suspension valve group.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a wheel type engineering machinery and a wheel load balancing method of the wheel type engineering machinery.
Background
The suspension is a generic term for all force-transmitting connection devices between the frame (or the carrier body) and the axle (or wheels) of a vehicle, which function to transmit forces and torque between the wheels and the frame, and to cushion the impact forces transmitted to the frame or the body by the uneven road surface and to reduce the vibrations caused thereby, so as to ensure smooth running of the vehicle. The main principle of the hydro-pneumatic suspension system is that the suspension oil cylinder and the inflatable energy accumulator absorb vertical impact load in the running process of the engineering vehicle, so that hydraulic oil moves back and forth between a rodless cavity of the suspension oil cylinder and the inflatable energy accumulator through an oil way, thereby playing a role in vibration reduction. The damping device has excellent nonlinear elastic characteristics and good damping performance, can well meet the smoothness requirement of the engineering vehicle, and is widely applied to engineering machinery wheeled vehicles. The hydro-pneumatic suspension generally has an automatic leveling function, and can level a suspension system of the vehicle to a target horizontal position before running so as to ensure that the vehicle is in a horizontal posture. When the wheel type heavy-load vehicle for engineering machinery is leveled, the controller controls the power-on or power-off condition of the suspension control valve according to a certain algorithm by detecting the middle position of the suspension oil cylinder, so that the vehicle is automatically leveled. However, after leveling, the pressure of the rod cavity and the rodless cavity of the suspension cylinder is different, so that the wheel load difference at two sides of the wheel type engineering machinery is larger, the longitudinal force difference of wheels at two sides of the wheel type engineering machinery in the running or braking process is larger, and the running safety and stability of a vehicle are affected.
Disclosure of Invention
The invention aims to provide a wheel type engineering machine capable of stably adjusting the wheel loads of wheels at two sides to be balanced after a suspension system is leveled.
The invention discloses a wheel type engineering machine in a first aspect, which comprises a controller and at least two wheel groups distributed at intervals along a running direction, wherein the wheel groups comprise two wheels which are positioned on two opposite sides of the wheel type engineering machine along a direction perpendicular to the running direction, the wheel type engineering machine also comprises a plurality of suspension components which are respectively in one-to-one correspondence with the at least two wheel groups, the suspension components comprise two suspension valve groups which are respectively connected with the two wheels of the corresponding wheel groups in one-to-one correspondence, the suspension components comprise a pressure oil port for pumping hydraulic oil and an oil return port for returning oil to an oil tank, the suspension valve groups comprise suspension cylinders connected with the corresponding wheels, the suspension cylinders comprise a first cavity for feeding hydraulic oil to extend the suspension cylinders and a second cavity for feeding hydraulic oil to shorten the suspension cylinders, the suspension valve group further comprises a first control valve group which is connected with the controller in a signal way and is connected between the first cavity and the pressure oil port as well as the oil return port, a pressure detector which is connected with the controller in a signal way and is used for detecting the pressure of hydraulic oil in the first cavity or the second cavity, an energy accumulator, a second control valve group which is connected with the controller in a signal way and is used for controlling the connection or disconnection of a pipeline and an overflow valve which is connected between the energy accumulator and the oil return port, the first control valve group is used for controlling the connection or disconnection between the first cavity connected with the first control valve group and the pressure oil port as well as the connection or disconnection between the first cavity connected with the first control valve group and the oil return port, the two suspension valve groups comprise a first suspension valve group and a second suspension valve group, the second control valve group of the first suspension valve group is connected with a pipeline between the accumulator of the first suspension valve group and the overflow valve and a second cavity of the suspension cylinder of the second suspension valve group, the second control valve group of the second suspension valve group is connected with the pipeline between the accumulator of the second suspension valve group and the overflow valve and the second cavity of the suspension cylinder of the first suspension valve group, the suspension assembly further comprises a third control valve group which is connected with the controller in a signal manner and is connected with the accumulator of the first suspension valve group and the accumulator of the second suspension valve group, and the third control valve group is used for controlling the connection or disconnection of the pipeline between the accumulator of the first suspension valve group and the accumulator of the second suspension valve group.
In some embodiments, the first control valve group comprises a first on-off valve and a second on-off valve, the first on-off valve is used for controlling the connection or disconnection of a pipeline, the first on-off valve is connected between the first cavity and the pressure oil port, and the second on-off valve is connected between the first cavity and the oil return port.
In some embodiments, the suspension valve group further comprises a fourth control valve group connecting a pipeline between the accumulator and the relief valve and the first chamber of the suspension cylinder, the fourth control valve group being used for controlling communication or disconnection between the pipeline between the accumulator and the relief valve and the first chamber of the suspension cylinder.
In some embodiments, the fourth control valve bank includes a third on-off valve having a first port connected to the first chamber, a second port connected to the line between the accumulator and the relief valve, a first fluid control port, and a second fluid control port, the third on-off valve having a first valve position where the first port and the second port are in communication, and a second valve position where the first port and the second port are out of communication, the first fluid control port being vented with a pressure fluid, the third on-off valve tending to switch to the first valve position, the second fluid control port being vented with a pressure fluid, the third on-off valve tending to switch to the second valve position.
In some embodiments, the effective pressure area of the hydraulic oil of the first chamber of the suspension cylinder of the two suspension valve groups is the same, and the effective pressure area of the hydraulic oil of the second chamber of the suspension cylinder of the two suspension valve groups is the same.
In some embodiments, the suspension cylinder single piston rod hydraulic cylinder, the first cavity is a rodless cavity, and the second cavity is a rod cavity.
The second aspect of the present invention discloses a wheel load balancing method for any one of the wheel-type construction machines, comprising:
When the absolute value of the difference between the detection results of the pressure sensors of the first suspension valve group and the pressure sensors of the second suspension valve group is larger than a first threshold value, the first control valve group and the third control valve group of the first suspension valve group and the second suspension valve group are disconnected, then the second control valve group of the first suspension valve group and the second suspension valve group is switched to a connected state and disconnected after the first time is kept in the connected state, then the third control valve group is switched to the connected state and the second control valve group of the first suspension valve group and the second suspension valve group is switched to the connected state after the second time is kept in the connected state, and the second control valve group of the first suspension valve group and the second suspension valve group is switched to the disconnected state after the third time is kept in the connected state.
Based on the wheel type engineering machinery provided by the invention, whether the pressure difference of the suspension cylinders of the wheels at the two sides of the wheel group is overlarge can be judged by judging the difference of the detection results of the pressure sensor of the first suspension valve group and the pressure sensor of the second suspension valve group, namely whether the wheel load is balanced is judged, when the pressure difference is overlarge, the pressure of hydraulic oil of the two suspension cylinders can be obtained by controlling and operating the first control valve group, the third control valve group and the second control valve group of the first suspension valve group and the second suspension valve group, and the pressure of the hydraulic oil of the two suspension cylinders is balanced by utilizing the pressure balance between the two accumulators, so that the impact on the two suspension cylinders in the pressure balance adjustment process can be reduced, and the pressure balance adjustment of the two suspension cylinders is more stable and effective.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
Fig. 1 is a schematic structural view of a wheel type construction machine according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a suspension assembly of the wheel type construction machine shown in fig. 1.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms are not meant to have any special meaning unless otherwise indicated, so that the scope of the present invention is not to be construed as being limited.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, the wheel type construction machine of the present embodiment includes a controller and at least two wheel sets that are spaced apart in a traveling direction, and in the embodiment shown in the drawing, includes 7 wheel sets. Each wheel set comprises two wheels 100 on opposite sides of the wheel-type work machine in a direction perpendicular to the direction of travel, the two wheels comprising a left wheel on the left side of the driver in the cab and a right wheel on the right side of the driver.
The wheel type engineering machine further comprises a plurality of suspension components which are respectively in one-to-one correspondence with the wheel groups. That is, each wheel set is provided with a suspension assembly in a matched manner, and one suspension assembly is used for controlling suspensions of two wheels of each wheel set.
The suspension assembly comprises two suspension valve groups which are respectively connected with two wheels 100 of the corresponding wheel group in a one-to-one correspondence manner, and the suspension assembly comprises a pressure oil port 11 for pumping hydraulic oil and an oil return port 12 for returning oil to the oil tank. The pressure port is used for outputting hydraulic oil, such as hydraulic oil pumped by a hydraulic pump.
The suspension valve group comprises suspension cylinders 2 connected to the respective wheels, the suspension cylinders 2 comprising a first chamber 21 for feeding hydraulic oil to extend the suspension cylinders 2 and a second chamber 22 for feeding hydraulic oil to shorten the suspension cylinders 2, the first chamber 21 being a rodless chamber in the embodiment shown in the figures, the second chamber being a rod-like chamber. The suspension valve group further comprises a first control valve group 31 which is in signal connection with the controller and is connected between the first cavity 21 and the pressure oil port 11 and the oil return port 12, a pressure detector which is in signal connection with the controller and is used for detecting the pressure of hydraulic oil in the first cavity 21 or the second cavity 22, an energy accumulator 41, a second control valve group 32 which is in signal connection with the controller and is used for controlling the connection or disconnection of a pipeline, and an overflow valve 43 which is connected between the energy accumulator 41 and the oil return port 12. The first control valve group 31 is connected between the first chamber 21 and the pressure port 11 and between the first chamber 21 and the oil return port 12. The first control valve group 31 is used for controlling the connection or disconnection between the first cavity 21 connected with the first control valve group and the pressure oil port 11 and the connection or disconnection between the first cavity 21 connected with the first control valve group and the oil return port 12, and the second control valve group 32 comprises an on-off valve which controls the connection or disconnection of a pipeline where the second control valve group is positioned through the state change of the connection or disconnection of the on-off valve. The two suspension valve groups comprise a first suspension valve group and a second suspension valve group, wherein the second control valve group 32 of the first suspension valve group is connected with a pipeline between the accumulator 41 and the overflow valve 43 of the first suspension valve group and the second cavity 22 of the suspension cylinder 2 of the second suspension valve group, namely, one end of the second control valve group 32 of the first suspension valve group is connected with a pipeline between the accumulator 41 and the overflow valve 43 of the first suspension valve group, and the other end of the second control valve group is connected with the second cavity 22 of the suspension cylinder 2 of the second suspension valve group, so that the communication of the second control valve group 32 of the first suspension valve group can be communicated with the pipeline between the accumulator 41 and the overflow valve 43 of the first suspension valve group and the second cavity 22 of the suspension cylinder 2 of the second suspension valve group. The second control valve group 32 of the second suspension valve group is connected with the pipeline between the accumulator 41 and the overflow valve 43 of the second suspension valve group and the second cavity 22 of the suspension cylinder 2 of the first suspension valve group, namely, one end of the second control valve group 32 of the second suspension valve group is connected with the pipeline between the accumulator 41 and the overflow valve 43 of the second suspension valve group, and the other end is connected with the second cavity 22 of the suspension cylinder 2 of the first suspension valve group. So that the communication of the second control valve group 32 of the second suspension valve group itself is able to communicate the conduit between the accumulator 41 of the second suspension valve group and the relief valve 43 with the second chamber 22 of the suspension cylinder 2 of the first suspension valve group.
The suspension assembly further comprises a third control valve group 33 in signal connection with the controller and connecting the accumulator 41 of the first suspension valve group and the accumulator 41 of the second suspension valve group, the third control valve group 33 being used for controlling the connection or disconnection of a pipeline between the accumulator 41 of the first suspension valve group and the accumulator 41 of the second suspension valve group.
After leveling, when the absolute value of the difference between the detection results of the pressure sensor 42 of the first suspension valve group and the pressure sensor 42 of the second suspension valve group is greater than a first threshold, the first threshold is a pressure value obtained by means of experience, experiment, simulation design, and the like, and when the difference between the detection results is greater than the first threshold, the imbalance of the wheel loads of the two wheels of the wheel group is reflected. At this time, the suspension cylinder of the suspension assembly can be pressure-leveled. Firstly, the controller enables the first control valve group 31 and the third control valve group 33 of the first suspension valve group and the second suspension valve group to be disconnected, then enables the second control valve group 32 of the first suspension valve group and the second suspension valve group to be switched to a communication state and to be disconnected after the communication state is kept for a first time, and the pressure balance is adjusted; the disconnection of the first control valve group 31 prevents the pressure oil port and the oil return port from affecting the pressure of the second cavity even if the second cavity and the pressure oil port and the oil return port of the suspension cylinder connected with the first control valve group are disconnected, the disconnection of the third control valve group 33 enables the accumulators of the first suspension valve group and the second suspension valve group to operate independently, after the second control valves 32 of the two suspension valve groups are switched to the connected state, the two accumulators are respectively communicated with the second cavities of the two suspension cylinders, the two accumulators establish pressure balance with the second cavities of the two suspension cylinders after the first time passes, and then the second control valves 32 are disconnected, so that the pressure of the two accumulators is maintained. Then, the third control valve group 33 is switched to the communication state, and after a second time is spent in the communication state, the second control valve group 32 of the first suspension valve group and the second suspension valve group is switched to the communication state, and after a third time is spent in the communication state, the second control valve group 32 of the first suspension valve group and the second suspension valve group is switched to the disconnection state; with the communication of the third control valve group 33, the two accumulators are communicated, pressure balance is established between the two accumulators after the second time passes, then the two second control valve groups 32 are switched to a communication state, then the two accumulators for establishing pressure balance are simultaneously communicated with the second cavities of the two suspension cylinders, and after the third time passes, pressure balance is established, so that the two suspension cylinders are pressure balanced, after the pressure balance is established, the two second control valve groups 32 are switched to an off state, the two suspension cylinders keep independent oil cavities again, and at the moment, the hydraulic oil pressure in the oil cavities is balanced, and the two wheel loads of the wheel set are balanced. The first time, the second time and the third time are required for establishing balance, and can be designed according to experience, experiment, simulation design and other means.
The wheel type engineering machine of this embodiment can determine whether the pressure difference between the suspension cylinders 2 of the wheels on both sides of the wheel set is too large by determining the difference between the detection results of the pressure sensor 42 of the first suspension valve set and the pressure sensor 42 of the second suspension valve set, that is, determine whether the wheel load is balanced, and when the pressure difference is too large, control and operate the first control valve set 31, the third control valve set 33 and the second control valve set 32 of the first suspension valve set and the second suspension valve set through the controller, so that the accumulators 41 of the first suspension valve set and the second suspension valve set can obtain the pressure of the hydraulic oil of the two suspension cylinders 2, and perform pressure balance on the two suspension cylinders 2 after performing pressure balance between the two accumulators 41. Because the inflow or outflow volume of hydraulic oil required by pressure balance is small, the building reaction is quick, the two energy accumulators are utilized to perform pressure balance with the connected suspension cylinders respectively, then the pressure balance is built between the two energy accumulators, and the pressure balance is built with the two suspension cylinders through the energy accumulators, so that the building process of the pressure balance is more stable and reliable, the impact on the two suspension cylinders 2 in the pressure balance adjusting process is reduced, and the pressure balance adjustment of the two suspension cylinders 2 is more stable and effective.
In some embodiments, as shown in the figure, the first control valve group 31 includes a first on-off valve 311 and a second on-off valve 312 for controlling on-off of a pipeline, the first on-off valve 311 is connected between the first chamber 21 and the pressure oil port 11, and the second on-off valve 312 is connected between the first chamber 21 and the oil return port 12. In the embodiment shown in the figure, the first on-off valve 311 and the second on-off valve 312 are two-position two-way electromagnetic on-off valves, the controller controls the first on-off valve 311 and the second on-off valve 312 to be powered on to realize the communication of the pipelines where the first on-off valve 311 and the second on-off valve 312 are located, and the controller controls the first on-off valve 311 and the second on-off valve 312 to be powered off to realize the disconnection of the pipelines where the first on-off valve 311 and the second on-off valve 312 are located.
In some embodiments, as shown in fig. 2, the suspension valve group further comprises a fourth control valve group 34 connecting the line between the accumulator 41 and the relief valve 43 and the first chamber 21 of the suspension cylinder 2, the fourth control valve group 34 being used to control the communication or disconnection between the line between the accumulator 41 and the relief valve 43 and the first chamber 21 of the suspension cylinder 2. As shown in the figure, the fourth control valve group 34 may be configured to connect and disconnect the accumulator to and from the first cavity of the suspension cylinder, so that by controlling the fourth control valve group, pressure balance between the accumulator and the first cavity of the suspension cylinder may be realized, and when a pressure difference between corresponding chambers of the suspension cylinder of the first suspension valve group and the suspension cylinder of the second suspension valve group exceeds a first threshold value, the pressure balance step between the accumulator and the second cavity of the suspension cylinder may also be referred to, and by controlling the connection or disconnection of the fourth control valve group, after the pressure balance between the accumulator and the first cavity of the suspension cylinder is performed, the pressure balance between the two accumulators is performed, and then, the pressure difference between the two suspension cylinders is adjusted in a manner of pressure balance between the accumulator and the first cavity of the suspension cylinder, so as to balance the wheel load of the wheel set.
In some embodiments, as shown, the fourth control valve bank 34 includes a third on-off valve having a first port connected to the first chamber 21, a second port connected to the line between the accumulator 41 and the relief valve 43, a first fluid control port, and a second fluid control port, the third on-off valve having a first valve position where the first port and the second port are in communication, and a second valve position where the first port and the second port are disconnected, the first fluid control port is vented with pressure fluid, the third on-off valve tends to switch to the first valve position, the second fluid control port is vented with pressure fluid, and the third on-off valve tends to switch to the second valve position. When the first fluid control port and the second fluid control port are hydraulic control ports, the pressure fluid is hydraulic oil, the third on-off valve is a two-position two-way hydraulic control on-off valve, and when the first fluid control port and the second fluid control port are pneumatic control ports, the pressure fluid is pressure gas, and the third on-off valve is a two-position two-way pneumatic control on-off valve.
In some embodiments, the effective pressure area of the hydraulic oil of the first chamber 21 of the suspension cylinders 2 of the two suspension valve groups is the same, and the effective pressure area of the hydraulic oil of the second chamber 22 of the suspension cylinders 2 of the two suspension valve groups is the same. In the embodiment shown in the figures, the suspension cylinders of the two suspension valve groups are identical in model, structure and size.
In some embodiments, the suspension cylinder 2 is a single piston rod hydraulic cylinder, the first chamber 21 being a rodless chamber and the second chamber 22 being a rod chamber.
In some embodiments, a method for balancing the wheel load of the wheel-type engineering machine is further disclosed, including:
When the absolute value of the difference between the detection results of the pressure sensor 42 of the first suspension valve group and the pressure sensor 42 of the second suspension valve group is larger than the first threshold value, the first control valve group 31 and the third control valve group 33 of the first suspension valve group and the second suspension valve group are first disconnected, then the second control valve group 32 of the first suspension valve group and the second suspension valve group is switched to the connected state and kept in the connected state for a first time, then the third control valve group 33 is switched to the connected state and the second control valve group 32 of the first suspension valve group and the second suspension valve group is switched to the connected state after the second time of being kept in the connected state, and the second control valve group 32 of the first suspension valve group and the second suspension valve group is switched to the disconnected state after the third time of being kept in the connected state.
In some embodiments, the controller described above may be a general purpose Processor, programmable logic controller (Programmable Logic Controller, abbreviated as PLC), digital signal Processor (DIGITAL SIGNAL Processor, abbreviated as DSP), application Specific Integrated Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, abbreviated as FPGA), or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or any suitable combination thereof for performing the functions described herein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (7)
1. The wheel type engineering machine is characterized by comprising a controller and at least two wheel groups which are distributed at intervals along the running direction, wherein the wheel groups comprise two wheels which are positioned on two opposite sides of the wheel type engineering machine along the direction perpendicular to the running direction, the wheel type engineering machine further comprises a plurality of suspension components which are respectively in one-to-one correspondence with the at least two wheel groups, the suspension components comprise two suspension valve groups which are respectively connected with the two wheels of the corresponding wheel groups in one-to-one correspondence, the suspension components comprise a pressure oil port for pumping hydraulic oil and an oil return port for returning oil to an oil tank, the suspension valve groups comprise suspension cylinders connected with the corresponding wheels, the suspension cylinders comprise a first cavity for introducing hydraulic oil to extend the suspension cylinders and a second cavity for introducing the hydraulic oil to shorten the suspension cylinders, the suspension valve group further comprises a first control valve group which is connected with the controller in a signal way and is connected between the first cavity and the pressure oil port as well as the oil return port, a pressure detector which is connected with the controller in a signal way and is used for detecting the pressure of hydraulic oil in the first cavity or the second cavity, an energy accumulator, a second control valve group which is connected with the controller in a signal way and is used for controlling the connection or disconnection of a pipeline and an overflow valve which is connected between the energy accumulator and the oil return port, the first control valve group is used for controlling the connection or disconnection between the first cavity connected with the first control valve group and the pressure oil port as well as the connection or disconnection between the first cavity connected with the first control valve group and the oil return port, the two suspension valve groups comprise a first suspension valve group and a second suspension valve group, the second control valve group of the first suspension valve group is connected with a pipeline between the accumulator of the first suspension valve group and the overflow valve and a second cavity of the suspension cylinder of the second suspension valve group, the second control valve group of the second suspension valve group is connected with the pipeline between the accumulator of the second suspension valve group and the overflow valve and the second cavity of the suspension cylinder of the first suspension valve group, the suspension assembly further comprises a third control valve group which is connected with the controller in a signal manner and is connected with the accumulator of the first suspension valve group and the accumulator of the second suspension valve group, and the third control valve group is used for controlling the connection or disconnection of the pipeline between the accumulator of the first suspension valve group and the accumulator of the second suspension valve group.
2. The wheel type engineering machine according to claim 1, wherein the first control valve group comprises a first on-off valve and a second on-off valve for controlling connection or disconnection of a pipeline, the first on-off valve is connected between the first cavity and the pressure oil port, and the second on-off valve is connected between the first cavity and the oil return port.
3. The wheel type construction machine according to claim 1, wherein the suspension valve group further includes a fourth control valve group connecting a pipe between the accumulator and the relief valve and the first chamber of the suspension cylinder, the fourth control valve group being for controlling communication or disconnection between the pipe between the accumulator and the relief valve and the first chamber of the suspension cylinder.
4. The wheel-type construction machine according to claim 2, wherein the fourth control valve group includes a third on-off valve having a first port connected to the first chamber, a second port connected to the line between the accumulator and the relief valve, a first fluid control port, and a second fluid control port, the third on-off valve having a first valve position in which the first port and the second port are in communication, and a second valve position in which the first port and the second port are disconnected, the first fluid control port being fed with a pressure fluid, the third on-off valve tending to switch to the first valve position, the second fluid control port being fed with a pressure fluid, the third on-off valve tending to switch to the second valve position.
5. The wheel type construction machine according to claim 1, wherein the effective pressure acting areas of the hydraulic oil of the first chambers of the suspension cylinders of the two suspension valve groups are identical, and the effective pressure acting areas of the hydraulic oil of the second chambers of the suspension cylinders of the two suspension valve groups are identical.
6. The wheel type engineering machine according to claim 5, wherein the suspension oil cylinder is a single piston rod hydraulic cylinder, the first cavity is a rodless cavity, and the second cavity is a rod cavity.
7. A method of equalizing the wheel load of the wheel-type construction machine according to any one of claims 1 to 6, comprising:
When the absolute value of the difference between the detection results of the pressure sensors of the first suspension valve group and the pressure sensors of the second suspension valve group is larger than a first threshold value, the first control valve group and the third control valve group of the first suspension valve group and the second suspension valve group are disconnected, then the second control valve group of the first suspension valve group and the second suspension valve group is switched to a connected state and disconnected after the first time is kept in the connected state, then the third control valve group is switched to the connected state and the second control valve group of the first suspension valve group and the second suspension valve group is switched to the connected state after the second time is kept in the connected state, and the second control valve group of the first suspension valve group and the second suspension valve group is switched to the disconnected state after the third time is kept in the connected state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410704358.6A CN118457123A (en) | 2024-05-31 | 2024-05-31 | Wheel type engineering machine and wheel load balancing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410704358.6A CN118457123A (en) | 2024-05-31 | 2024-05-31 | Wheel type engineering machine and wheel load balancing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118457123A true CN118457123A (en) | 2024-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410704358.6A Pending CN118457123A (en) | 2024-05-31 | 2024-05-31 | Wheel type engineering machine and wheel load balancing method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN118457123A (en) |
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2024
- 2024-05-31 CN CN202410704358.6A patent/CN118457123A/en active Pending
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