WO2023097872A1

WO2023097872A1 - Anti-deviation crawler travel hydraulic system

Info

Publication number: WO2023097872A1
Application number: PCT/CN2022/071226
Authority: WO
Inventors: 刘小华; 辛德忠; 陈航; 唐敏; 万军; 王清峰; 张始斋; 吕晋军; 蒲剑; 马振纲; 杨林; 雷万年; 万园; 周富佳; 鲁石平; 王兴
Original assignee: 中煤科工集团重庆研究院有限公司
Priority date: 2021-12-02
Filing date: 2022-01-11
Publication date: 2023-06-08
Also published as: AU2022279525A1; CN114060332B; CN114060332A

Abstract

An anti-deviation crawler travel hydraulic system, comprising a power module, a travel module and a control module. The power module and the control module respectively communicate with the travel module. The power module comprises an oil tank (1), a hydraulic pump (3) connected to the oil tank (1), and an electric motor (2). The travel module comprises a first travel motor (14) and a second travel motor (15), which are connected in parallel, and the travel module is connected to the control module by means of a multi-way valve (13). The control module comprises a first precise pressure-reducing valve (9), a second precise pressure-reducing valve (10), a third precise pressure-reducing valve (11) and a fourth precise pressure-reducing valve (12), which are connected in parallel, and respectively controls the clockwise and anti-clockwise rotation of the first travel motor (14) and the second travel motor (15). The anti-deviation crawler travel hydraulic system can prevent deviation in the movement process of an automatic drill, thereby improving the passing capability thereof; in addition, the system can automatically regulate an output pressure of a pump according to a change in an external load, thus reducing the energy loss of the hydraulic system.

Description

An anti-deviation crawler hydraulic system

technical field

The invention belongs to the technical field of hydraulic systems, and relates to a crawler hydraulic system for preventing running deviation.

Background technique

Traditional devices mostly use single pump and double motors to drive the crawler walking device. This kind of system is prone to out-of-synchronization of the left and right motor speeds, resulting in asynchronous speed of the left and right track drive wheels, and cannot drive the left and right tracks to maintain synchronization. walk. Therefore, the ordinary crawler hydraulic system is easy to deviate when moving the machine, and it needs to be corrected by manual operation every few meters.

Contents of the invention

In view of this, the object of the present invention is to provide an anti-deviation crawler hydraulic system, which uses a load-sensitive hydraulic system to automatically adjust the output pressure of the pump according to changes in external loads, and uses a precision pressure relief valve to control the load-sensitive multi-way valve spool Precise displacement, so as to maintain the synchronous walking of the dual motors.

To achieve the above object, the present invention provides the following technical solutions:

An anti-deviation crawler hydraulic system, including a power module, a walking module, and a control module; the power module and the control module are respectively connected to the walking module; the power module includes a fuel tank, a hydraulic pump connected to the fuel tank, and a motor The travel module includes a first travel motor and a second travel motor arranged in parallel, and the travel module is connected to the control module through a multi-way valve; the control module includes a first precision pressure reducing valve and a second precision pressure relief valve arranged in parallel. The pressure reducing valve, the third precision pressure reducing valve and the fourth precision pressure reducing valve respectively control the forward rotation and reverse rotation of the first travel motor and the second travel motor.

Optionally, the first precision pressure reducing valve, the second precision pressure reducing valve and the first hydraulic control switching valve are connected to the walking module in parallel; the third pressure reducing valve, the fourth pressure reducing valve and the second The hydraulic control switching valve is connected to the walking module in parallel.

Optionally, the first precision pressure relief valve, the second precision pressure relief valve, the third precision pressure relief valve, and the fourth precision pressure relief valve are all connected to a pilot handle for controlling the walking module.

Optionally, the power module is connected to the walking module through a filter.

Optionally, both the first hydraulically controlled on-off valve and the second hydraulically controlled on-off valve are connected to the travel module through a manual reversing valve.

Optionally, the oil outlet of the power module is connected to the P port of the multi-way valve, the T port of the multi-way valve is connected to the fuel tank; the M port of the multi-way valve is connected to a pressure gauge, and the P port of the multi-way valve is connected to the oil tank. The fluid passes through the bridge oil circuit in the valve, and flows into the oil inlet port of the first valve section and the oil inlet port of the second valve section of the multi-way valve respectively, and the working oil ports A and B of the first valve section of the multi-way valve The ports are respectively connected to the oil inlet and outlet of the first traveling motor, and the working oil ports A and B of the second valve plate of the multi-way valve are respectively connected to the oil inlet and oil outlet of the second traveling motor. The oil outlets of the first valve plate and the second valve plate flow back to the oil tank through the internal bridge oil circuit, and the oil drain port of the first travel motor and the oil drain port of the second travel motor are connected to the oil tank so that the oil Drain directly back to tank.

Optionally, the hydraulic pump in the power module is a load-sensing pump, and its control oil port X is connected to the feedback oil port Ls of the multi-way valve; the pilot oil port Pp of the multi-way valve is divided into two oil circuits Liquid, all the way into the pilot handle, all the way into the manual reversing valve.

Optionally, one line of oil from the pilot oil port Pp of the multi-way valve is connected to the oil inlet of the manual reversing valve, and the oil outlet of the manual reversing valve is divided into two lines of oil, and one line of oil is connected to the first hydraulic control valve. The hydraulic control port of the switch valve is connected, and the other is connected with the hydraulic control port of the second hydraulic control switch, and the first hydraulic control switch valve and the second hydraulic control switch valve are connected in parallel.

Optionally, the pilot handle is a two-piece split structure, including a first handle and a second handle, wherein the two working oil ports A and B of the first handle are divided into two oil paths, one of which is oil They are respectively connected to the oil inlet ports of the first precision pressure reducing valve and the second precision pressure reducing valve, while the oil outlet of the first precision pressure reducing valve is connected to the upper liquid control port of the first joint valve plate of the multi-way valve, and the second The oil outlet of the precision decompression valve is connected to the lower hydraulic control port of the first valve section of the multi-way valve; the other oil is respectively connected to the oil inlet of the first hydraulic control switch valve, The oil port has two streams of oil, one of which is connected to the upper liquid control port of the first valve section of the multi-way valve, and the other oil is connected to the lower liquid control port of the first valve plate of the multi-way valve;

The two working oil ports A and B of the second handle are divided into two lines of oil, one of which is connected to the oil inlets of the third precision pressure reducing valve and the fourth precision pressure reducing valve respectively, and the third precision pressure reducing valve The oil outlet of the pressure relief valve is connected to the upper hydraulic control port of the second valve section of the multi-way valve, and the oil outlet of the fourth precision pressure reducing valve is connected to the lower hydraulic control port of the second valve section of the multi-way valve; The oil is respectively connected to the oil inlet of the second hydraulic control switch valve, and the oil outlet of the second hydraulic control switch valve contains two oils, one of which is connected to the upper liquid of the second valve plate of the multi-way valve. Control port, and another stream of oil is connected to the lower liquid control port of the second valve section of the multi-way valve.

Optionally, the first precision pressure relief valve, the second precision pressure relief valve, the third precision pressure relief valve, and the fourth precision pressure relief valve are all composed of a fixed value pressure relief valve and a one-way valve connected in parallel.

The beneficial effects of the present invention are:

The invention discloses an anti-deviation crawler belt walking hydraulic system, which can adjust the crawler belts to synchronous walking according to needs. At this time, when the crawler belts are operated again, the double crawler belts can always keep synchronous without frequent correction. Applying this system to walking machinery can ensure that the walking machinery prevents deviation during the moving process and improves the passing capacity when moving the machine, especially when passing through narrow road sections. The load-sensing hydraulic system adopted can automatically adjust the output pressure of the pump according to the change of the external load, which reduces the energy loss of the hydraulic system, reduces the heat generation of the hydraulic system, and improves the working efficiency of the hydraulic system.

Other advantages, objects and features of the present invention will be set forth in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the investigation and research below, or can be obtained from It is taught in the practice of the present invention. The objects and other advantages of the invention may be realized and attained by the following specification.

Description of drawings

In order to make the purpose of the present invention, technical solutions and advantages clearer, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic diagram of the system of the present invention.

Reference signs: 1-fuel tank; 2-motor; 3-hydraulic pump; 4-filter; 5-manual reversing valve; 6-pilot handle; 7-first hydraulic control switch valve; 8-second hydraulic control switch Valve; 9-the first precision pressure reducing valve; 10-the second precision pressure reducing valve; 11-the third precision pressure reducing valve; 12-the fourth precision pressure reducing valve; 13-multi-way valve; 14-the first travel motor ; 15-the second travel motor; 16-pressure gauge.

Detailed ways

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should not be construed as limiting the present invention; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, Enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that certain known structures and their descriptions in the drawings may be omitted.

In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the same or similar components; , "front", "rear" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices or elements must It has a specific orientation, is constructed and operated in a specific orientation, so the terms describing the positional relationship in the drawings are for illustrative purposes only, and should not be construed as limiting the present invention. For those of ordinary skill in the art, the understanding of the specific meaning of the above terms.

Please refer to Figure 1, the main components of the present invention include a fuel tank 1, a motor 2, a hydraulic pump 3, a filter 4, a manual reversing valve 5, a pilot handle 6, a first hydraulic control switch valve 7, and a second hydraulic control switch valve 8 , the first precision decompression valve 9, the second precision decompression valve 10, the third precision decompression valve 11, the fourth precision decompression valve 12, the multi-way valve 13, the first travel motor 14, the second travel motor 15, pressure gauge 16.

The oil tank 1 is a component for storing hydraulic oil in the hydraulic system, and also plays a role of cooling and heat dissipation to a certain extent; the motor 2 is an intrinsically safe explosion-proof three-phase asynchronous motor, which can provide power input for the hydraulic pump 3 ; The hydraulic pump 3 is a load-sensitive pump, which can output the corresponding flow according to the required control amount. Driven by the motor 2, the conversion from mechanical energy to hydraulic energy can be realized to provide power for the entire hydraulic system; the filter 4 It is a high-pressure filter, which is a hydraulic accessory, which can filter impurities for the hydraulic system, ensure the oil cleanliness of the hydraulic system, and prevent oil pollution; the manual reversing valve 5 is a two-position three-way reversing valve, which automatically With a steel ball positioning device, the oil flow direction of the oil can be switched through the operating handle, and the hydraulic system can be switched between the "anti-deviation" state and the "normal" state; the pilot handle 6 is a hydraulic control double handle, Contains a left handle (first handle) and a right handle (second handle), which can control the counterclockwise and clockwise rotation of the first traveling motor 14 and the second traveling motor 15; the first hydraulic control switch valve 7 and the second The hydraulic control switch valves 8 are two-position four-way switch valves; the first precision pressure reducing valve 9, the second precision pressure reducing valve 10, the third precision pressure reducing valve 11 and the fourth precision pressure reducing valve 12 are all fixed pressure reducing valves. It is composed of a value pressure reducing valve and a one-way valve. The control pressure from the pilot handle 6 can precisely control the displacement of the spool of the multi-way valve 13 through the regulation of the precision pressure reducing valve. The multi-way valve 13 is a load-sensitive multi-way The valve adopts a split structure, including two-connected three-position four-way hydraulic directional valve. The load-sensing multi-way valve is a kind of one-way valve that can feed back the pressure, flow and power change signals to the multi-way valve to realize the control function. The valve can accurately control the flow of the first travel motor 14 and the second travel motor 15, thereby ensuring the synchronization of the left and right crawlers and preventing deviation; the first travel motor 14 and the second travel motor 15 are hydraulic actuators, which can The hydraulic energy is converted into mechanical energy to achieve forward and reverse bidirectional rotation. The first traveling motor 14 is installed on the driving wheel of the left crawler, and the second traveling motor 15 is installed on the driving wheel of the right crawler. Through the first traveling motor 14 , The forward and reverse rotation of the second traveling motor 15 can control the forward, backward and turning of the crawler belt. Finally, the pressure gauge 16 is a hydraulic accessory used to monitor the pressure of the hydraulic system in real time.

The motor 2 is connected to the hydraulic pump 3, the hydraulic pump 3 is a load sensitive pump, its oil suction port is connected to the oil tank 1, its oil outlet is connected to the oil inlet of the filter 4, and the oil outlet of the filter 4 It is connected to the P port of the multi-way valve 13, the T port of the multi-way valve is connected to the oil tank 1, and the M port of the multi-way valve is connected to the pressure gauge 16. The oil from the P port of the multi-way valve 13 flows into the multi- The oil inlet port of the first valve plate and the oil inlet port of the second valve plate of the multi-way valve 13, the working oil port (port A, port B) of the first valve plate of the multi-way valve 13 is connected with the first travel motor 14 respectively. , oil outlet connection, the second joint valve plate working oil ports (A port, B port) of the multi-way valve 13 are respectively connected with the inlet and outlet ports of the second travel motor 15, the first joint valve plate and the second joint The oil outlet of the valve plate flows back to the oil tank 1 through the internal bridge oil circuit. The oil drain ports of the first travel motor 14 and the second travel motor 15 are all connected to the fuel tank 1, so that the oil in the travel motor housing directly leaks back to the fuel tank. At the same time, the control oil port (X port) of the hydraulic pump 3 is connected to the load feedback port (Ls port) of the multi-way valve 13 to realize the load sensitivity of flow and pressure. The pilot oil port (Pp port) of the load-sensing multi-way valve 13 is divided into two oil paths, one path is connected to the pilot handle 6, and the other path is connected to the manual reversing valve 5.

Pilot handle 6 is a two-piece split structure, including left and right handles, wherein the two working oil ports (A port, B port) of the left handle are divided into two oil paths, one of which (including two oil flows) They are respectively connected to the oil inlets of the first precision pressure reducing valve 9 and the second precision pressure reducing valve 10, while the oil outlet of the first precision pressure reducing valve 9 is connected to the upper liquid control port of the first joint valve plate of the multi-way valve 13. connected, the oil outlet of the second precision decompression valve 10 is connected with the lower liquid control port of the first joint valve plate of the multi-way valve 13; The oil inlet port of the first hydraulic control switching valve 7 has two oil outlets, one of which is connected to the upper hydraulic control port of the first valve plate of the multi-way valve 13, and the other oil Connect to the lower liquid control port of the first valve section of the multi-way valve 13.

In the same way, the two working oil ports (port A and port B) of the right handle are divided into two circuits of oil, one of which (including two stocks of oil) is connected to the third precision pressure reducing valve 11 and the fourth precision pressure reducing valve respectively. The oil inlet of the valve 12 is connected, and the oil outlet of the third precision pressure reducing valve 11 is connected with the upper liquid control port of the second valve plate of the multi-way valve 13, and the oil outlet of the fourth precision pressure reducing valve 12 is connected with the multi-way valve 13. The lower liquid control port of the second joint valve plate of the road valve 13 is connected; the other road oil (comprising two oil liquids) is respectively connected with the oil inlet of the second hydraulic control switch valve 8, and the outlet of the second hydraulic control switch valve 8 The oil port contains two streams of oil, one of which is connected to the upper hydraulic control port of the second valve section of the multi-way valve 13, and the other oil is connected to the lower hydraulic control port of the second valve section of the multi-way valve 13. mouth.

At the same time, another path of oil from the pilot oil port (Pp port) of the multi-way valve 13 is connected to the oil inlet of the manual reversing valve 5, and the oil outlet of the manual reversing valve 5 is divided into two paths of oil, one path of oil and The hydraulic control port of the first hydraulic control switch valve 7 is connected, and the other channel is connected with the second hydraulic control switch valve 8, that is, the first hydraulic control switch valve 7 and the second hydraulic control switch valve 8 are connected in parallel.

When the motor 2 rotates, it drives the hydraulic pump 3 to absorb the oil from the oil tank 1, and through the action of the high-pressure filter 4, the oil is filtered. The oil enters the oil inlet (P port) of the multi-way valve 13 and passes through the The valve internal shunt, one way of oil passes through the pilot oil port (Pp port) to form a control oil source that acts on the manual reversing valve 5 and pilot handle 6; the other way of oil forms a power oil source through the internal bridge oil circuit of the multi-way valve 13, It flows into the first joint valve plate and the second joint valve, and distributes and acts on the first travel motor 14 and the second travel motor 15, thereby driving the rotation of the motors and driving the crawler belts. The forward rotation and reverse rotation of the motor can be controlled by controlling the oil circuit, and then the crawler belt is driven forward and backward, and the internal oil return of the multi-way valve 13 returns to the oil tank 1 through the oil return port (T port). The pressure gauge 16 can monitor the pressure of the system in real time.

The present invention mainly includes two working states.

(1) Anti-deviation state:

Operate the manual reversing valve 5, put the handle in the "anti-running deviation" state, according to the state shown in the attached figure, that is, push the handle upwards, the lower position of the manual reversing valve is connected, and the control oil source from the Pp port can only flow into the pilot Push up the handle 6 and the handle of the manual reversing valve 5, the system is in the state of "anti-deviation", and the control oil flowing into the manual reversing valve (5) is disconnected. Immediately, the control oil is divided into two paths, passes through the bridge oil circuit inside the pilot handle 6, and enters the left handle and the right handle respectively. Mark the direction according to the diagram, operate the left and right handles with both hands, and move the handle to the left. At this time, the control oil The liquid enters the oil, and the left handle flows in from the first precision pressure reducing valve 9, and then acts on the upper liquid control port of the first valve section of the multi-way valve 13. At this time, the upper function of the first valve section can be connected, and the main oil The power oil source of the road flows into the first travel motor 14 through the upper position, and the first travel motor 14 rotates counterclockwise. The lower control oil of the first joint valve plate passes through the check valve inside the second precision pressure reducing valve 10 and finally discharges through the left handle. Oil returns to tank 1. The right handle flows through the third precision pressure reducing valve 11, and flows into the upper hydraulic control port of the second valve section of the multi-way valve 13. At this time, the upper function of the second valve section can be connected, and the power oil source from the main oil circuit passes through The upper position flows into the second travel motor 15, and the second travel motor 15 rotates counterclockwise. The lower control oil of the second joint valve plate passes through the check valve inside the fourth precision pressure reducing valve 12 and finally returns to the oil tank 1 through the right handle.

In the same way, operate the left and right handles with both hands, and move the handles to the right. At this time, the oil is controlled to enter the oil, and the left handle flows in from the second precision pressure reducing valve 10, and then acts on the first valve plate of the multi-way valve 13. At this time, the lower function of the first valve plate can be connected, and the power source oil from the main oil circuit flows into the first travel motor 14 through the lower position, the first travel motor 14 rotates clockwise, and the first valve plate The upper control oil passes through the check valve inside the first precision pressure reducing valve 9 and finally returns to the oil tank 1 through the left handle to drain the oil. The right handle flows through the fourth precision pressure reducing valve 12, and flows into the lower liquid control port of the second valve section of the multi-way valve 13. At this time, the lower function of the second valve section can be connected, and the power source from the main oil circuit passes through the lower Flow into the second travel motor 15, the second travel motor 15 rotates clockwise, the lower control oil of the second joint valve plate passes through the check valve inside the third precision pressure reducing valve 11, and finally drains the oil back to the oil tank 1 through the right handle.

(2) Normal state:

Operate the manual reversing valve 5, put the handle in the "normal" state, according to the state shown in the attached figure, that is, the handle is pulled down, the upper position of the manual reversing valve is connected, and the control oil source from the pilot oil port (Pp port) is divided into Two paths, one path of oil flows through the manual reversing valve 5, and then acts on the first hydraulic control switch valve 7 and the second hydraulic control switch valve 8, at this time the first hydraulic control switch valve 7 and the second hydraulic control switch valve 8 The lower bit is connected, and the switch valve is opened to form a passage. The other way flows into the pilot handle 6, and the control oil is divided into two streams and passes through the bridge oil circuit inside the pilot handle 6, and enters the left handle and the right handle respectively. Mark the direction according to the diagram, operate the left and right handles with both hands, and move the handle to the left. At this time, the control oil enters the oil, and the left handle flows in from the first hydraulic control switch valve 7, and then acts on the upper hydraulic control port of the first valve plate of the multi-way valve 13. At this time, the upper function of the first valve plate can be connected Connected, the power oil source from the main oil circuit flows into the first travel motor 14 through the upper position, the first travel motor 14 rotates counterclockwise, the lower control oil of the first valve plate flows out through the first hydraulic control switch valve 7, and finally passes through the left The operating handle drains the oil back to the fuel tank 1. The right handle controls the oil source to flow in through the second hydraulic control switching valve 8, and then acts on the upper hydraulic control port of the second valve plate of the multi-way valve 13. At this time, the upper function of the second valve plate is connected, and the main The power source of the oil circuit flows into the second travel motor 15 through the upper position, and the second travel motor 15 rotates counterclockwise. The upper control oil of the second valve plate flows out through the second hydraulic control switch valve 8, and finally drains the oil through the right operating handle to return to the Fuel tank 1.

In the same way, mark the direction according to the diagram, operate the left and right operating handles with both hands, and turn the handle to the right. At this time, the oil is controlled to enter the oil, and the left handle flows in from the first hydraulic control switch valve 7, and then acts on the multi-channel The lower hydraulic control port of the first valve section of valve 13, at this time, the lower function of the first valve section can be connected, and the power source oil from the main oil circuit flows into the first travel motor 14 through the lower position, and the first travel motor 14 clockwise Rotate; the upper control oil of the first joint valve plate flows out through the first hydraulic control switch valve 7, and finally drains the oil back to the oil tank 1 through the left operating handle. The right handle flows through the second hydraulic control switching valve 8, and flows into the lower hydraulic control port of the second valve plate of the multi-way valve 13. At this time, the lower function of the second valve plate can be connected, and the power source from the main oil circuit passes through the lower position. It flows into the second travel motor 15, and the second travel motor 15 rotates clockwise, and the upper control oil of the second valve plate passes through the second hydraulic control switching valve 8 and returns to the oil tank 1 through the right handle.

The hydraulic pump 3 is a load-sensing pump; the multi-way valve 13 is a load-sensing multi-way valve, and the control oil port (X port) of the hydraulic pump 3 is connected to the load-sensing feedback port (Ls port) of the multi-way valve 13 connect. Through the mutual cooperation of the load sensing system of the hydraulic pump 3 and the multi-way valve 13, when the load from the first travel motor 14 and the second travel motor 15 changes, the hydraulic pump 3 and the multi-way valve 13 will automatically adjust the output pressure accordingly, Output the corresponding flow according to the required control amount to realize "on-demand supply", then the entire hydraulic system will achieve efficiency improvement and reduce energy loss.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should be included in the scope of the claims of the present invention.

Claims

An anti-deviation crawler walking hydraulic system is characterized in that: it includes a power module, a walking module, and a control module; the power module and the control module are respectively connected to the walking module; the power module includes a fuel tank, a hydraulic pump and motor; the travel module includes a first travel motor and a second travel motor arranged in parallel, and the travel module is connected to the control module through a multi-way valve; the control module includes a first precision pressure reducing valve arranged in parallel , the second precision pressure reducing valve, the third precision pressure reducing valve, and the fourth precision pressure reducing valve respectively control the forward rotation and reverse rotation of the first travel motor and the second travel motor.
The anti-deviation crawler walking hydraulic system according to claim 1, characterized in that: the first precision pressure reducing valve, the second precision pressure reducing valve and the first hydraulic control switching valve are connected to the walking module in parallel; The third precision pressure reducing valve, the fourth precision pressure reducing valve and the second hydraulic control switching valve are connected to the walking module in parallel.
The anti-deviation crawler hydraulic system according to claim 2, characterized in that: the first precision pressure relief valve, the second precision pressure relief valve, the third precision pressure relief valve, and the fourth precision pressure relief valve are all connected To the pilot handle used to control the travel module.
The anti-deviation crawler hydraulic system according to claim 1, characterized in that: the power module is connected to the travel module through a filter.
The anti-deviation crawler walking hydraulic system according to claim 3, characterized in that: the first hydraulic control on-off valve and the second hydraulic control on-off valve are both connected to the travel module through a manual reversing valve.
The anti-deviation crawler hydraulic system according to claim 5, characterized in that: the oil outlet of the power module is connected to the P port of the multi-way valve, and the T port of the multi-way valve is connected to the fuel tank; the multi-way valve The M port is connected to the pressure gauge, and the oil at the P port of the multi-way valve flows into the oil inlet port of the first valve plate and the oil inlet port of the second valve plate of the multi-way valve respectively through the bridge oil circuit in the valve. The working oil ports A and B of the first valve section of the valve are respectively connected to the oil inlet and oil outlet of the first travel motor, and the working oil ports A and B of the second valve section of the multi-way valve are respectively It is connected with the oil inlet and outlet of the second travel motor, and the oil outlets of the first valve plate and the second valve plate flow back to the oil tank through the internal bridge oil circuit, and the oil drain port of the first travel motor is connected with the oil outlet of the second valve plate. The oil drain ports of the two walking motors are all connected to the fuel tank so that the oil can directly drain back to the fuel tank.
The anti-deviation crawler hydraulic system according to claim 6, characterized in that: the hydraulic pump in the power module is a load-sensitive pump, and its control oil port X is connected to the feedback oil port Ls of the multi-way valve; The pilot oil port Pp of the multi-way valve is divided into two oil paths, one path is connected to the pilot handle, and the other path is connected to the manual reversing valve.
According to claim 5, the anti-deviation crawler walking hydraulic system is characterized in that: the oil of the pilot oil port Pp port of the multi-way valve is connected to the oil inlet of the manual reversing valve, and the oil outlet of the manual reversing valve The port is divided into two oil circuits, one oil circuit is connected to the hydraulic control port of the first hydraulic control switch valve, and the other circuit is connected to the hydraulic control port of the second hydraulic control switch, the first hydraulic control switch valve and the second hydraulic control switch valve in parallel.
The anti-deviation crawler hydraulic system according to claim 3, characterized in that: the pilot handle is a two-joint split structure, including a first handle and a second handle, wherein the two working oil ports of the first handle Port A and port B are divided into two circuits of oil, one of which is connected to the oil inlet of the first precision pressure reducing valve and the second precision pressure reducing valve respectively, while the oil outlet of the first precision pressure reducing valve is connected to the multi-channel oil The upper hydraulic control port of the first valve section of the valve is connected, and the oil outlet of the second precision pressure reducing valve is connected with the lower hydraulic control port of the first valve section of the multi-way valve; the other oil channel is respectively connected with the first hydraulic control switch The oil inlet port of the valve is connected, and the oil outlet port of the first hydraulic control switch valve has two streams of oil, one of which is connected to the upper liquid control port of the first valve plate of the multi-way valve, and the other oil is connected to Into the lower liquid control port of the first valve section of the multi-way valve;

The two working oil ports A and B of the second handle are divided into two lines of oil, one of which is connected to the oil inlets of the third precision pressure reducing valve and the fourth precision pressure reducing valve respectively, and the third precision pressure reducing valve The oil outlet of the pressure relief valve is connected to the upper hydraulic control port of the second valve section of the multi-way valve, and the oil outlet of the fourth precision pressure reducing valve is connected to the lower hydraulic control port of the second valve section of the multi-way valve; The oil is respectively connected to the oil inlet of the second hydraulic control switch valve, and the oil outlet of the second hydraulic control switch valve contains two oils, one of which is connected to the upper liquid of the second valve plate of the multi-way valve. Control port, and another stream of oil is connected to the lower liquid control port of the second valve section of the multi-way valve.
The anti-deviation crawler hydraulic system according to claim 1, characterized in that: the first precision pressure relief valve, the second precision pressure relief valve, the third precision pressure relief valve, and the fourth precision pressure relief valve are all composed of A fixed pressure reducing valve and a one-way valve are connected in parallel.