Hydraulic control system for testing motor steering and loading different pressure values

Abstract

The hydraulic control system comprises a reversing hydraulic system, a motor module and a loading hydraulic system, the reversing hydraulic system comprises an oil supply module and a reversing module, the oil supply module is connected with an oil inlet port P1 of the reversing module, and the motor module is connected with an oil outlet port P2 of the reversing module. The hydraulic loading system comprises an adjusting module and a loading module, the adjusting module is connected with a first connecting oil way and a second connecting oil way of the loading module to form a first adjusting oil way and a second adjusting oil way, and the motor module is connected with the reversing module and the loading module. Different cartridge valves in a first cartridge valve group of the reversing module are controlled to be closed or opened through the power-on or power-off state of every two electromagnetic valves in an electromagnetic valve group of the reversing module, so that the reversing test of the motor module is completed; and after different cartridge valves in a second cartridge valve group of the loading module are controlled to be closed or opened by adjusting the oil path I or the oil path II, loading tests of different hydraulic oil pressure values are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor testing, in particular to a hydraulic control system for testing motor steering and loading different pressure values. BACKGROUND

[0002] In the practical application of hydraulic technology, hydraulic oil circuit control is achieved by adjusting the pressure, flow and direction of the hydraulic system, and precise control of the execution element is achieved to ensure that the equipment can adapt to different working conditions and run efficiently and stably. At the same time, the hydraulic oil circuit can also test the hydraulic valve produced, which can verify the durability and sealing performance of the hydraulic valve under different hydraulic oil pressures, avoiding system failure or safety accidents caused by component failure.

[0003] For example, Chinese patent No. 201922032775.8, published on September 8, 2020, discloses a hydraulic motor loading test system, which comprises a variable frequency motor and a bridge circuit, the bridge circuit comprises a first interface, a second interface, a third interface and a fourth interface, the variable frequency motor is connected with a measured motor, one oil port of the measured motor is connected with the first interface, the fourth interface is connected with a loading overflow valve, the loading overflow valve is connected with a pressure gauge, a first thermometer, a second filter and a cooler in sequence, the cooler is connected with the second interface, and the third interface is connected with another oil port of the measured motor to form a closed circuit.

[0004] The above document tests the measured motor by cooperating the variable frequency motor and the bridge circuit to achieve efficient testing and accurate measurement of various specifications of hydraulic motors. However, it only changes the hydraulic oil pressure of the measured motor through the bridge circuit, and does not perform a reversing test on the measured motor before testing, so that it can only perform a one-way hydraulic test on the measured motor and cannot perform a different hydraulic oil pressure value loading test in the forward and reverse directions. SUMMARY

[0005] The present application provides a hydraulic control system for testing motor steering and loading different pressure values, which can first perform a reversing test on the loading motor, and then perform a different hydraulic oil pressure value loading test in the forward and reverse directions on the loading motor, to improve the efficiency of different tests on the loading motor.

[0006] To achieve the above object, the present application provides the following technical scheme: a hydraulic control system for testing motor rotation and loading different pressure values, comprising a reversing hydraulic system, a motor module and a loading hydraulic system, the reversing hydraulic system comprising an oil supply module and a reversing module, the oil supply module being connected with an oil inlet port P1 of the reversing module, the loading hydraulic system comprising an adjusting module and a loading module, the adjusting module being connected with a first connecting oil way and a second connecting oil way of the loading module to form an adjusting oil way one and an adjusting oil way two respectively, the motor module being connected with the reversing module and the loading module, the oil supply module supplying oil to the reversing module, the motor module completing a reversing test of the motor module by controlling different cartridge valves of a first cartridge valve group of the reversing module to close or open through the on or off state of every two solenoid valves of a solenoid valve group of the reversing module, and the loading test of different hydraulic oil pressure values being realized after the different cartridge valves of a second cartridge valve group of the loading module are controlled to close or open through the adjusting oil way one or the adjusting oil way two.

[0007] The above arrangement can first cooperate the solenoid valve group and the first cartridge valve group of the reversing module, and in this process, only by controlling every two different solenoid valves of the solenoid valve group to be in the on or off state, the flow direction of the hydraulic oil in the first cartridge valve group can be controlled, the motor module is tested in different reversing, to ensure that the forward rotation and the reverse rotation of the motor module meet the operation requirements after the reversing test, so that the different cartridge valves of the second cartridge valve group of the loading module are controlled to be in the closed or open state through the adjusting oil way one or the adjusting oil way two after the forward rotation and the reverse rotation meet the requirements, and the additional oil of the adjusting oil way one or the adjusting oil way two is adjusted at the same time, so that the motor module is tested in different hydraulic oil pressure values, so that the motor is first tested in reversing, and then tested in different hydraulic oil pressure values in forward rotation and reverse rotation, to improve the efficiency of different tests on the motor.

[0008] Further, the reversing module comprises an oil inlet port P1, an interface A, an interface B, a first cartridge valve group, a solenoid valve group, a backflow oil way and a pilot pump group oil way, the oil inlet port P1 being connected with the first cartridge valve group, the motor module being connected with the interface A and the interface B respectively, the interface A and the interface B being connected with the first cartridge valve group, the pilot pump group oil way being connected with one end of different solenoid valves of the solenoid valve group respectively, the solenoid valves of the solenoid valve group being communicated with an oil tank, the first cartridge valve group comprising four cartridge valves, the solenoid valve group comprising four solenoid valves, the other end of different solenoid valves of the solenoid valve group being connected with the control end of different cartridge valves of the first cartridge valve group respectively, every two solenoid valves of the solenoid valve group controlling different cartridge valves of the first cartridge valve group to close or open in the on or off state, so that the hydraulic oil flows through the motor module from the interface A, flows back to the first cartridge valve group through the interface B, and then flows back to the oil tank through the backflow oil way.

[0009] The above setting can connect interface A and interface B with the first plug-in valve group respectively. When different electromagnetic valves in the electromagnetic valve group are in the powered state, the hydraulic oil in the pilot pump group oil circuit flows to different plug-in valves in the first plug-in valve group through the electromagnetic valve, and then pushes the valve core of the plug-in valve connected with the corresponding electromagnetic valve to move to the input end, so that the plug-in valve connected with the corresponding electromagnetic valve is closed. When different electromagnetic valves in the electromagnetic valve group are in the power-off state, the plug-in valve connected with the corresponding electromagnetic valve can be opened, so that the hydraulic oil flows out of the first plug-in valve group to interface A, flows back to the first plug-in valve group through interface B after passing through the loading motor, and flows reversely through the cooperation between different plug-in valves in the first plug-in valve group, that is, the hydraulic oil flows out of the first plug-in valve group to interface B, flows back to the first plug-in valve group through interface A after passing through the loading motor, thereby realizing the reversing test of the loading motor, so that only four plug-in valves and four electromagnetic valves are needed to realize the reversing of A and B, and the reversing can be realized by controlling the opening and closing of the plug-in valve by the electromagnetic valve, without the need of connecting multiple plug-in valves. The hydraulic oil circuit connection is simple and the cost is low, and the control mode is simple.

[0010] Further, the oil supply module includes an oil supply oil circuit, a hydraulic pump one and a hydraulic pump two, the hydraulic pump one and the hydraulic pump two are connected with the driving device one, one end of the hydraulic pump one forms an interface c1, one end of the hydraulic pump two forms an interface c2, the interface c1 and the interface c2 are connected with the oil supply oil circuit, the other end of the hydraulic pump one forms an interface d1, and the other end of the hydraulic pump two forms an interface d2; the oil supply oil circuit includes a ball valve one, a flexible joint, a branch oil circuit one and a branch oil circuit two, one end of the ball valve one is connected with an oil tank, the other end of the ball valve one is connected with one end of the flexible joint, the other end of the flexible joint is connected with the branch oil circuit one and the branch oil circuit two respectively, the branch oil circuit one includes a ball valve two and an interface e1, the branch oil circuit two includes a ball valve three and an interface e2, and the interface c1 is connected with the interface e1 or the interface e2.

[0011] The above setting can realize the test of different hydraulic pumps by connecting the reversing module with the interface d1 or the interface d2 according to the actual hydraulic oil pressure demand of the loading motor, and then selecting different hydraulic pumps for test. After selecting different hydraulic pumps, the interface c1 and the interface e2 can be connected with different branch oil circuits according to the selection of different hydraulic pumps, so that two hydraulic pumps can be used simultaneously or one hydraulic pump can be used alone.

[0012] Further, the first plug-in valve group comprises plug-in valve one, plug-in valve two, plug-in valve three and plug-in valve four, the oil inlet port P1 is connected with the interface z1 of plug-in valve one and the interface z2 of plug-in valve three respectively, the interface z3 of plug-in valve one is connected with the interface A and the interface z4 of plug-in valve two respectively, the return oil circuit is connected with the interface z5 of plug-in valve two and the interface z6 of plug-in valve four respectively, the interface z12 of plug-in valve three is connected with the interface z7 of plug-in valve four and the interface B respectively; the electromagnetic valve group comprises electromagnetic valve one, electromagnetic valve two, electromagnetic valve three and electromagnetic valve four, the interface v3 of electromagnetic valve one is connected with the interface z10 of plug-in valve two, the interface v6 of electromagnetic valve two is connected with the interface z8 of plug-in valve one, the interface v9 of electromagnetic valve three is connected with the interface z11 of plug-in valve two, the interface v12 of electromagnetic valve four is connected with the interface z9 of plug-in valve four, the pilot pump group oil circuit is connected with the interface v2 of electromagnetic valve one, the interface v5 of electromagnetic valve two, the interface v8 of electromagnetic valve three and the interface v11 of electromagnetic valve four respectively, the interface v1 of electromagnetic valve one, the interface v4 of electromagnetic valve two, the interface v7 of electromagnetic valve three and the interface v10 of electromagnetic valve four are all connected with the oil tank.

[0013] The above arrangement can connect the interface A and the interface B with the first plug-in valve group respectively, so that the hydraulic oil can flow out of the first plug-in valve group to the interface A, flow back to the first plug-in valve group through the interface B after passing through the loading motor, and flow reversely through the cooperation between different plug-in valves in the first plug-in valve group, i.e. the hydraulic oil can flow out of the first plug-in valve group to the interface B, flow back to the first plug-in valve group through the interface A after passing through the loading motor, thereby realizing the reversing test of the loading motor; meanwhile, when different electromagnetic valves in the electromagnetic valve group are in the powered state, the hydraulic oil in the pilot pump group oil circuit can flow to different plug-in valves in the first plug-in valve group after being reversed by the electromagnetic valves, thereby pushing the spools of the plug-in valves connected with the corresponding electromagnetic valves to move, so that the plug-in valves connected with the corresponding electromagnetic valves are closed, and when different electromagnetic valves in the electromagnetic valve group are in the unpowered state, the plug-in valves connected with the corresponding electromagnetic valves can be opened, and the hydraulic oil in the oil circuit connected with the spools in the plug-in valves can flow back to the oil tank through the electromagnetic valves.

[0014] Further, the return oil circuit comprises an oil return overflow valve and an oil return filter, one end of the oil return overflow valve is connected with the oil return filter, and the oil return filter is connected with the oil tank; the pilot pump group oil circuit comprises a one-way valve one, a hydraulic pump three and a ball valve four, the hydraulic pump three is connected with the driving device two, one end of the one-way valve one is connected with one end of the hydraulic pump three, the other end of the hydraulic pump three is connected with one end of the ball valve four, and the other end of the ball valve four is connected with the oil tank.

[0015] The above setting facilitates the back pressure provided by the oil return overflow valve to the returned hydraulic oil, so that the loading motor is prevented from rotating too fast during the test; and through the action of the hydraulic pump three, the hydraulic oil in the oil tank can flow to the electromagnetic valve group, and the check valve one prevents the hydraulic oil from flowing back, so that the pilot pump group oil circuit is always filled with hydraulic oil. After the electromagnetic valve in the electromagnetic valve group is powered on, it can timely push the valve core of the corresponding cartridge valve of the first cartridge valve group to move.

[0016] Further, the loading module includes a second oil supply oil circuit, a first connecting oil circuit, a second connecting oil circuit, a second cartridge valve group, and a second oil return oil circuit. The second oil supply oil circuit is connected with one end of the second cartridge valve group. The second oil supply oil circuit includes an overflow valve one, one end of which is connected with one end of the cartridge valve group, and the other end of the overflow valve two is connected with the oil tank. The other end of the second cartridge valve group is connected with the first connecting oil circuit and the second connecting oil circuit respectively. The third end of the second cartridge valve group is connected with the second oil return oil circuit. The second oil return oil circuit is connected with the second oil supply oil circuit through the reversing valve one. The first connecting oil circuit is connected with the adjusting module through the reversing valve two to form the first adjusting oil circuit. The second connecting oil circuit is connected with the adjusting module through the reversing valve two to form the second adjusting oil circuit. The adjusting module includes an overflow valve two, one end of which is connected with the oil tank, and the other end of which is connected with the reversing valve two. The motor module is connected with the interface PA1 in the first connecting oil circuit and the interface PB1 in the second connecting oil circuit respectively.

[0017] The above setting can locally release the pressure of the hydraulic oil entering the second cartridge valve group through the overflow valve one in the second oil supply oil circuit when the loading motor is tested at different hydraulic oil pressure values for multiple times, so as to ensure that the hydraulic oil pressure value entering the second cartridge valve group meets the requirements of the loading motor test, and also protects the second cartridge valve group from being damaged due to excessive hydraulic oil pressure. Then, the hydraulic oil passing through the second cartridge valve group enters the loading motor from the interface PA1 in the first connecting oil circuit, flows back to the second cartridge valve group from the interface PB1 in the second connecting oil circuit after passing through the loading motor, and finally flows back to the oil tank through the second oil return oil circuit. When it is necessary to change the hydraulic oil pressure value entering the loading motor, the pressure value of the overflow valve two in the adjusting module can be changed, so that the pressurized hydraulic oil enters the interface PA1 or the interface PB1 through the connecting oil circuit. In this way, the pressurized hydraulic oil can directly bypass the second cartridge valve group, which can protect the second cartridge valve group while meeting the requirements of the loading motor test at different hydraulic oil pressure values for multiple times, so that the test result of the loading motor is more accurate.

[0018] Further, the motor module includes a test motor and a loading motor. The test motor and the loading motor are connected through a torque speed instrument. The test motor has an interface a1 and an interface a2 at two ends respectively. The loading motor has an interface b1, an interface b3, and an interface b2, and an interface b4 at two ends respectively.

[0019] The above arrangement facilitates the connection of the interface PA1 in the first connection oil path and the interface PB1 in the second connection oil path to the loading motor through the interfaces b1 and b2 respectively, and facilitates the connection of the interface A and the interface B of the reversing module to the loading motor through the interfaces b3 and b4 respectively, and facilitates the connection of the interface a1 and the interface a2 of the test motor to form a loop with the oil tank, so that the test motor can be driven to rotate by driving the loading motor, and multiple tests of different hydraulic oil pressure values can be realized.

[0020] Further, the second oil supply path comprises a ball valve five, a second flexible joint, a hydraulic pump four, and a one-way valve three, the hydraulic pump four is connected to the driving device one, one end of the ball valve five is connected to the oil tank, the other end of the ball valve five is connected to one end of the second flexible joint, the other end of the second flexible joint is connected to one end of the hydraulic pump four, the other end of the hydraulic pump four is connected to one end of the one-way valve three, the other end of the one-way valve three is connected to the overflow valve one, the reversing valve one and the second cartridge valve group respectively; the second oil return path comprises a second oil return overflow valve, the reversing valve one and an oil return filter, one end of the second oil return overflow valve is connected to the second cartridge valve group, the other end of the second oil return overflow valve is connected to the interface T7 of the reversing valve one, the interface T9 of the reversing valve one is connected to the oil return filter, and the oil return filter is connected to the oil tank.

[0021] The above arrangement can make the hydraulic oil flow to the overflow valve one, the reversing valve one and the second cartridge valve group through the one-way valve three, and the one-way valve three can prevent the hydraulic oil from flowing back, and the pressure value of the overflow valve one can be adjusted to adjust the hydraulic oil pressure entering the reversing valve one and the second cartridge valve group, thereby protecting the second cartridge valve group and meeting the test requirements of the loading motor; the second oil return overflow valve provides back pressure to the returned hydraulic oil, so that the loading motor does not rotate too fast during the test, and the reversing valve one first acts on the cartridge valve five and the cartridge valve six of the second cartridge valve group with part of the hydraulic oil before the hydraulic oil enters the loading motor, so that the cartridge valve five and the cartridge valve six are in a closed state, so that the hydraulic oil entering the second cartridge valve group can directly enter the loading motor through the interface PA1, and then the reversing valve one is reversed, so that the hydraulic oil flowing back from the interface PB1 to the second cartridge valve group flows back to the second oil return path through the cartridge valve five and the cartridge valve six, and then flows back to the oil tank.

[0022] Further, the first connection oil path comprises a flow meter one, a ball valve six, an interface T1 and an interface PA1, the interface PA1 is connected to one end of the ball valve six and the second cartridge valve group respectively, the other end of the ball valve six is connected to one end of the flow meter one, the other end of the flow meter one is connected to the interface T1. The connecting oil path two comprises a flow meter two, a ball valve seven, an interface T2 and an interface PB1. The interface PB1 is connected with one end of the ball valve seven and the second cartridge valve group respectively. The other end of the ball valve seven is connected with one end of the flow meter two. The other end of the flow meter two is connected with the interface T2.

[0023] When the hydraulic oil enters the loading motor from the interface PA1 for test and the pressure value of the hydraulic oil needs to be changed, the additional part of the hydraulic oil can enter the loading motor from the interface PA1 for test of different hydraulic oil pressure values through the connecting oil path one. After the hydraulic oil is reversed, when the hydraulic oil enters the loading motor from the interface PB1 for test and the pressure value of the hydraulic oil needs to be changed, the additional part of the hydraulic oil can enter the loading motor from the interface PB1 for test of different hydraulic oil pressure values through the connecting oil path two, so as to meet the test of different directions and different hydraulic oil pressure values.

[0024] Further, the adjusting module comprises a reversing valve two, a hydraulic pump five, a one-way valve two and a ball valve eight. The interface T1 is connected with the interface T3 of the reversing valve two. The interface T2 is connected with the interface T4 of the reversing valve two. The interface T5 of the reversing valve two is connected with the overflow valve two and one end of the one-way valve two respectively. The interface T6 of the reversing valve two and the other end of the overflow valve two are connected with the oil tank. The other end of the one-way valve two is connected with one end of the hydraulic pump five. The other end of the hydraulic pump five is connected with one end of the ball valve eight. The other end of the ball valve eight is connected with the oil tank. The second cartridge valve group comprises cartridge valves five, six, seven and eight. The interface PA1 is connected with the interface z1 of the cartridge valve five, the interface z9 of the cartridge valve seven and the interface z10 of the cartridge valve seven respectively. The interface z3 of the cartridge valve five is connected with the interface z2 of the cartridge valve five, the interface z5 of the cartridge valve six, the interface z6 of the cartridge valve six and the second return oil path respectively. The interface z4 of the cartridge valve six is connected with the interface PB1, the interface z61 of the cartridge valve eight and the interface z7 of the cartridge valve eight respectively. The interface z11 of the cartridge valve seven and the interface z8 of the cartridge valve eight are connected with the other end of the one-way valve three.

[0025] The above setting can adjust the pressure value of overflow valve two according to the actual hydraulic oil pressure value required by the loading motor when hydraulic oil flows to reversing valve two through hydraulic pump five, so that the pressure value of the hydraulic oil flowing to connecting oil way one or connecting oil way two through reversing valve two meets the pressure value required by the loading motor; and the pressure value of the hydraulic oil is adjusted by adjusting oil way one and adjusting oil way two acting on different cartridge valves in the second cartridge valve group, so that the hydraulic oil flows from the second oil supply oil way through the second cartridge valve group, then enters the loading motor through the interface PA1 for testing, flows back to the second cartridge valve group through the interface PB1 after flowing through the loading motor, and flows back to the oil tank through the second oil return oil way; and after the hydraulic oil is reversed, the hydraulic oil can flow from the second oil supply oil way through the second cartridge valve group, then enter the loading motor through the interface PB1 for testing, flow back to the second cartridge valve group through the interface PA1 after flowing through the loading motor, and flow back to the oil tank through the second oil return oil way. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Hydraulic diagram of the oil supply module of the application.

[0027] Figure 2 Hydraulic diagram of the motor module of the application.

[0028] Figure 3 Hydraulic diagram of the reversing module of the application.

[0029] Figure 4 Connection schematic diagram of the first cartridge valve group of the application.

[0030] Figure 5 Connection schematic diagram of the electromagnetic valve group of the application.

[0031] Figure 6 Hydraulic connection schematic diagram of the second oil supply oil way, connecting oil way one, connecting oil way two, second cartridge valve group and second oil return oil way of the application.

[0032] Figure 7 Hydraulic diagram of the adjusting module of the application.

[0033] Figure 8 Connection schematic diagram of the second cartridge valve group of the application. DETAILED DESCRIPTION

[0034] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0035] As Figures 1-8As shown, the hydraulic control system for testing the motor steering and loading different pressure values comprises a reversing hydraulic system, a motor module and a loading hydraulic system, the reversing hydraulic system comprises an oil supply module and a reversing module, the oil supply module is connected with an oil inlet port P1 of the reversing module, the loading hydraulic system comprises an adjusting module and a loading module, the adjusting module is connected with connection oil paths one and two of the loading module to form adjusting oil paths one and two respectively, the motor module is connected with the reversing module and the loading module respectively, after the oil supply module supplies oil to the reversing module, the motor module reversing test is completed by controlling different cartridge valves in a first cartridge valve group of the reversing module to close or open through the on or off state of every two solenoid valves in a solenoid valve group of the reversing module, after different cartridge valves in a second cartridge valve group of the loading module are controlled to close or open through the adjusting oil path one or the adjusting oil path two, the loading test of different hydraulic oil pressure values is realized, so that the motor module can be tested in different directions through the cooperation of the solenoid valve group and the first cartridge valve group of the reversing module, and in the process, only by controlling every two different solenoid valves in the solenoid valve group to be in the on or off state, the flow direction of the hydraulic oil in the first cartridge valve group can be controlled, the motor module is tested in different directions to ensure that the forward rotation and the reverse rotation of the motor module meet the operation requirements after the motor module is tested in different directions, so that after the forward rotation and the reverse rotation meet the requirements, different cartridge valves in the second cartridge valve group of the loading module are controlled to be in the closed or open state through the adjusting oil path one or the adjusting oil path two, and the additional oil supply of the adjusting oil path one or the adjusting oil path two is adjusted, so that the motor module is tested in different hydraulic oil pressure values, so that the loading motor is tested in different directions first, and then the loading motor is tested in different hydraulic oil pressure values in the forward and reverse directions, so as to improve the efficiency of testing the loading motor in different ways.

[0036] As shown, Figure 3 The reversing module comprises an oil inlet port P1, an interface A, an interface B, a first cartridge valve group r6, a solenoid valve group r10, a backflow oil path and a pilot pump group oil path, the oil supply module is connected with the oil inlet port P1, as shown, Figure 1As shown, the oil supply module includes an oil supply oil path r3, a hydraulic pump one r1 and a hydraulic pump two r2, the hydraulic pump one r1 and the hydraulic pump two r2 are connected with the driving device one, one end of the hydraulic pump one r1 forms an interface c1, one end of the hydraulic pump two r2 forms an interface c2, the interface c1 and the interface c2 are connected with the oil supply oil path r3, the other end of the hydraulic pump one r1 forms an interface d1, the other end of the hydraulic pump two r2 forms an interface d2, the oil supply oil path r3 includes a ball valve one, a flexible joint, a branch oil path one and a branch oil path two, one end of the ball valve one is connected with the oil tank, the other end of the ball valve one is connected with one end of the flexible joint, the other end of the flexible joint is connected with the branch oil path one and the branch oil path two respectively, the branch oil path one includes a ball valve two and an interface e1, the branch oil path two includes a ball valve three and an interface e2, specifically, the other end of the flexible joint is connected with one end of the ball valve two and one end of the ball valve one respectively, the other end of the ball valve two forms the interface e1, the other end of the ball valve one forms the interface e2, the interface c1 is connected with the interface e1, the interface e2 is connected with the interface e2, in this way, after selecting different hydraulic pumps, the interface c1 and the interface e2 can be connected with different branch oil paths according to the selection of different hydraulic pumps, and then two hydraulic pumps can be used simultaneously or one hydraulic pump can be used alone, and when one hydraulic pump is used alone, the ball valve of the branch oil path one or the branch oil path two can be closed, so that the actual hydraulic oil pressure demand of the loading motor r5 can be connected with the interface d1 or the interface d2 through the reversing module, and then different hydraulic pumps can be selected for testing.

[0037] As Figure 2As shown, the motor module includes a test motor r4 and a loading motor r5, the test motor r4 is connected with the loading motor r5 through a torque tachometer, two ends of the test motor r4 are respectively provided with an interface a1 and an interface a2, two ends of the loading motor r5 are respectively provided with an interface b1, an interface b3 and an interface b2, an interface b4, so as to facilitate the interface PA1 in the first oil circuit and the interface PB1 in the second oil circuit to be connected with the loading motor through the interface b1 and the interface b2 respectively, at the same time, the interface A and the interface B of the reversing module are connected with the loading motor through the interface b3 and the interface b4 respectively, and the interface a1 and the interface a2 of the test motor r4 form a loop by being connected with the oil tank, so that the test motor r4 can be driven to rotate by driving the loading motor r5, and the reversing test is realized, for example, when the loading motor r5 rotates clockwise, it is observed whether the test motor r4 rotates clockwise and whether the rotating speed measured by the torque tachometer meets the requirements, and when the loading motor r5 rotates counterclockwise, it is observed whether the test motor r4 rotates counterclockwise and whether the rotating speed measured by the torque tachometer meets the requirements. In the embodiment, a first ball valve r51 is arranged between the interface b1 and the loading motor r5, a second ball valve r52 is arranged between the interface b3 and the loading motor r5, a third ball valve r53 is arranged between the interface b2 and the loading motor r5, and a fourth ball valve r54 is arranged between the interface b4 and the loading motor r5.

[0038] As shown in Figure 3 The oil inlet port P1, the interface A and the interface B are all connected with the first cartridge valve group r6, the pilot pump group oil circuit is connected with different electromagnetic valves in the electromagnetic valve group r10 respectively, different electromagnetic valves in the electromagnetic valve group r10 are matched with different cartridge valves in the first cartridge valve group r6 in the state of being powered on or powered off, so that the hydraulic oil flows from the interface A, passes through the loading motor r5, then flows back to the first cartridge valve group r6 through the interface B, and then flows back to the oil tank through the return oil circuit.

[0039] As shown in Figure 3 The return oil circuit includes a return oil overflow valve r7 and a return oil filter r8, one end of the return oil overflow valve r7 is connected with the return oil filter r8, and the return oil filter r8 is connected with the oil tank, so as to facilitate the return hydraulic oil to provide back pressure through the return oil overflow valve r7, so as to prevent the loading motor r5 from rotating too fast during the test process.

[0040] The pilot pump group oil circuit comprises a one-way valve one, a hydraulic pump three r9 and a ball valve four, the hydraulic pump three r9 is connected with the driving device two, one end of the one-way valve one is connected with one end of the hydraulic pump three r9, the other end of the hydraulic pump three r9 is connected with one end of the ball valve four, the other end of the ball valve four is connected with the oil tank, through the action of the hydraulic pump three r9, the hydraulic oil in the oil tank can flow to the electromagnetic valve group r10, and the one-way valve one prevents the hydraulic oil from flowing back, so that the pilot pump group oil circuit is always filled with hydraulic oil, and after the electromagnetic valve in the electromagnetic valve group r10 is powered on, the electromagnetic valve can timely push the valve core of the corresponding cartridge valve of the first cartridge valve group r6 to move. In the embodiment, the driving device one and the driving device two are both driving motors.

[0041] As shown in Figure 4 The first cartridge valve group r6 comprises a cartridge valve one r15, a cartridge valve two r16, a cartridge valve three r17 and a cartridge valve four r18, the oil inlet port P1 is connected with the interface z1 of the cartridge valve one r15 and the interface z2 of the cartridge valve three r17 respectively, the interface z3 of the cartridge valve one r15 is connected with the interface A and the interface z4 of the cartridge valve two r16 respectively, the other end of the oil overflow valve r7 is connected with the interface z5 of the cartridge valve two r16 and the interface z6 of the cartridge valve four r18 respectively, the interface z12 of the cartridge valve three r17 is connected with the interface z7 of the cartridge valve four r18 and the interface B respectively, so that the interface A and the interface B are connected with the first cartridge valve group r6 respectively, the hydraulic oil can flow out from the first cartridge valve group r6 to the interface A, flow back to the first cartridge valve group r6 through the interface B after passing through the loading motor r5, and through the cooperation between different cartridge valves in the first cartridge valve group r6, the hydraulic oil can flow reversely, that is, the hydraulic oil flows out from the first cartridge valve group r6 to the interface B, flows back to the first cartridge valve group r6 through the interface A after passing through the loading motor r5, and then the loading motor r5 is reversed.

[0042] As shown in Figure 5As shown, the electromagnetic valve group r10 includes electromagnetic valve one r11, electromagnetic valve two r12, electromagnetic valve three r13 and electromagnetic valve four r14, the interface v3 of electromagnetic valve one r11 is connected with the interface z10 of cartridge valve two r16, the interface v6 of electromagnetic valve two r12 is connected with the interface z8 of cartridge valve one r15, the interface v9 of electromagnetic valve three r13 is connected with the interface z11 of cartridge valve two r16, the interface v12 of electromagnetic valve four r14 is connected with the interface z9 of cartridge valve four r18, the other end of one-way valve one is connected with the interface v2 of electromagnetic valve one r11, the interface v5 of electromagnetic valve two r12, the interface v8 of electromagnetic valve three r13 and the interface v11 of electromagnetic valve four r14 respectively, the interface v1 of electromagnetic valve one r11, the interface v4 of electromagnetic valve two r12, the interface v7 of electromagnetic valve three r13 and the interface v10 of electromagnetic valve four r14 are all connected with the oil tank, so that when different electromagnetic valves in the electromagnetic valve group r10 are in the powered state, the hydraulic oil in the pilot pump group oil circuit can flow to different cartridge valves in the first cartridge valve group r6 through the electromagnetic valve, and then push the spool of the cartridge valve connected with the corresponding electromagnetic valve to move, so that the cartridge valve connected with the corresponding electromagnetic valve is closed, and when different electromagnetic valves in the electromagnetic valve group r10 are in the power-off state, the cartridge valve connected with the corresponding electromagnetic valve can be opened, and the hydraulic oil in the oil circuit connected with the spool in the cartridge valve flows back to the oil tank through the electromagnetic valve.

[0043] As shown in Figures 6-8 As shown, the loading module includes a second oil supply circuit, a first connecting circuit, a second connecting circuit, a second cartridge valve group w0 and a second return oil circuit, one end of the second cartridge valve group is connected with the second oil supply circuit, the other end of the second cartridge valve group is connected with the first connecting circuit and the second connecting circuit respectively, the third end of the second cartridge valve group is connected with the second return oil circuit, and the second return oil circuit is connected with the second oil supply circuit through the reversing valve one w11, as shown in Figure 4As shown, the second plug-in valve group includes plug-in valve five w1, plug-in valve six w2, plug-in valve seven w3 and plug-in valve eight w4, the interface PA1 is connected with the interface z1 of plug-in valve five w1, the interface z9 of plug-in valve seven w3 and the interface z10 of plug-in valve seven w3 respectively, the interface z3 of plug-in valve five w1 is connected with the interface z2 of plug-in valve five w1, the interface z5 of plug-in valve six w2, the interface z6 of plug-in valve six w2 and the second return oil circuit respectively, the interface z4 of plug-in valve six w2 is connected with the interface PB1, the interface z61 of plug-in valve eight w4 and the interface z7 of plug-in valve eight w4 respectively, the interface z11 of plug-in valve seven w3 and the interface z8 of plug-in valve eight w4 are connected with the other end of one-way valve three w16, so that the oil circuit one and the adjusting oil circuit two can act on different plug-in valves in the second plug-in valve group respectively for adjusting, and then the hydraulic oil passes through the second plug-in valve group from the second oil supply circuit, enters the loading motor from the interface PA1 for test, flows back to the second plug-in valve group through the interface PB1 after flowing through the loading motor, and flows back to the oil tank through the second return oil circuit; after the hydraulic oil is reversed, the hydraulic oil can pass through the second plug-in valve group from the second oil supply circuit, then enter the loading motor from the interface PB1 for test, flow back to the second plug-in valve group through the interface PA1 after flowing through the loading motor, and flow back to the oil tank through the second return oil circuit.

[0044] As shown in the figure, Figure 6 As shown, the second oil supply circuit includes ball valve five w13, second flexible joint w14, hydraulic pump four w15, one-way valve three w16 and overflow valve one w17, the hydraulic pump four w15 is connected with the driving device one, one end of the ball valve five w13 is connected with the oil tank, the other end of the ball valve five w13 is connected with one end of the second flexible joint w14, the other end of the second flexible joint w14 is connected with one end of the hydraulic pump four w15, the other end of the hydraulic pump four w15 is connected with one end of the one-way valve three w16, the other end of the one-way valve three w16 is connected with the overflow valve one w17, the interface T8 of the reversing valve one w11 and the interface z11 of plug-in valve seven w3 and the interface z8 of plug-in valve eight w4 in the second plug-in valve group respectively, so that the hydraulic oil can flow to the overflow valve one w17, the reversing valve one w11 and the second plug-in valve group through the one-way valve three w16 by the hydraulic pump four w15, the one-way valve three w16 can prevent the hydraulic oil from flowing back, and the pressure value of the overflow valve one w17 can be adjusted, so as to adjust the hydraulic oil pressure entering the reversing valve one w11 and the second plug-in valve group, thereby playing a role in protecting the second plug-in valve group and meeting the test requirements of the loading motor. A pressure sensor is connected at the interface T8 of the reversing valve one w11 for detecting the hydraulic oil pressure value entering the second plug-in valve group. In this embodiment, the driving device one is a driving motor.

[0045] As shown in the figure, Figure 6As shown, the connection oil circuit one is connected with the adjusting module through the reversing valve two w5 to form the adjusting oil circuit one, and the connection oil circuit two is connected with the adjusting module through the reversing valve two w5 to form the adjusting oil circuit two. The connection oil circuit one comprises a flowmeter one w18, a ball valve six w19, an interface T1 and an interface PA1. The interface PA1 is connected with one end of the ball valve six w19 and the second cartridge valve group respectively. The other end of the ball valve six w19 is connected with one end of the flowmeter one w18. The other end of the flowmeter one w18 is connected with the interface T1. The connection oil circuit two comprises a flowmeter two w20, a ball valve seven w21, an interface T2 and an interface PB1. The interface PB1 is connected with one end of the ball valve seven w21 and the second cartridge valve group respectively. The other end of the ball valve seven w21 is connected with one end of the flowmeter two w20. The other end of the flowmeter two w20 is connected with the interface T2. In this way, when the hydraulic oil enters the loading motor from the interface PA1 for testing and the pressure value of the hydraulic oil needs to be changed, the additional part of the hydraulic oil can enter the loading motor from the interface PA1 through the connection oil circuit one for testing of different hydraulic oil pressure values. After the hydraulic oil is reversed, when the hydraulic oil enters the loading motor from the interface PB1 for testing and the pressure value of the hydraulic oil needs to be changed, the additional part of the hydraulic oil can enter the loading motor from the interface PB1 through the connection oil circuit two for testing of different hydraulic oil pressure values, so as to meet the testing of different directions and different hydraulic oil pressure values.

[0046] As shown in the figure, Figure 7 As shown, the adjusting module comprises a reversing valve two w5, an overflow valve two w6, a hydraulic pump five w7, a one-way valve two w8 and a ball valve eight w9. The interface T1 is connected with the interface T3 of the reversing valve two w5. The interface T2 is connected with the interface T4 of the reversing valve two w5. The interface T5 of the reversing valve two w5 is connected with one end of the overflow valve two w6 and the one-way valve two w8 respectively. The interface T6 of the reversing valve two w5 and the other end of the overflow valve two w6 are both connected with the oil tank. The other end of the one-way valve two w8 is connected with one end of the hydraulic pump five w7. The other end of the hydraulic pump five w7 is connected with one end of the ball valve eight w9. The other end of the ball valve eight w9 is connected with the oil tank. In this way, when the hydraulic oil flows to the reversing valve two w5 through the hydraulic pump five w7, the pressure value of the hydraulic oil flowing to the connection oil circuit one or the connection oil circuit two through the reversing valve two w5 can be adjusted according to the actual hydraulic oil pressure value required by the loading motor, so as to make the pressure value of the hydraulic oil required by the loading motor change. In this embodiment, the hydraulic pump five w7 is connected with the driving device two, and the driving device two is a driving motor.

[0047] As shown in the figure, Figure 6As shown, the second return oil circuit comprises a second return oil overflow valve w10, a reversing valve one w11 and a return oil filter w12, one end of the second return oil overflow valve w10 is connected with the second cartridge valve group, the other end of the second return oil overflow valve w10 is connected with the interface T7 of the reversing valve one w11, the interface T9 of the reversing valve one w11 is connected with one end of the return oil filter w12, and the other end of the return oil filter w12 is connected with the oil tank, so as to provide back pressure for the returned hydraulic oil through the second return oil overflow valve w10, so as to prevent the loading motor from rotating too fast during the test process, and the reversing valve one w11 is used to act on the cartridge valve five w1 and the cartridge valve six w2 of the second cartridge valve group through part of the hydraulic oil before the hydraulic oil enters the loading motor, so that the cartridge valve five w1 and the cartridge valve six w2 are in a closed state, and the cartridge valve seven w3 and the cartridge valve eight w4 are opened, so that the hydraulic oil entering the second cartridge valve group can directly enter the loading motor through the interface PA1, and then the reversing valve one w11 is reversed, so that the hydraulic oil returned from the interface PB1 to the second cartridge valve group returns to the second return oil circuit through the cartridge valve five w1 and the cartridge valve six w2, and then returns to the oil tank.

[0048] In the embodiment, when the forward rotation test of the loading motor r5 is needed, the second ball valve r52 and the third ball valve r53 connected with the loading motor r5 are opened respectively, the second ball valve r51 and the third ball valve r54 connected with the loading motor r5 are closed, the interface e1 of the branch oil way one is connected with the interface c1 of the hydraulic pump one r1, the interface d1 of the hydraulic pump one r1 is connected with the oil inlet port P1 of the reversing module, the interfaces b1 and b2 of the loading motor r5 are connected with the interfaces A and B of the reversing module respectively, the hydraulic oil enters the first cartridge valve group r6 from the oil inlet port P1, and the electromagnetic valve one r11 and the electromagnetic valve three r13 in the electromagnetic valve group r10 are electrified at the same time. At this time, the hydraulic oil in the pilot pump group oil acts on the cartridge valve two r16 and the cartridge valve three r17 through the electromagnetic valve one r11 and the electromagnetic valve three r13 after being reversed. Since the electromagnetic valve one r11 and the electromagnetic valve three r13 are reversed, z11 of the cartridge valve two r16 and z10 of the cartridge valve three r17 flow back to the oil tank through v1 of the electromagnetic valve one r11 and v7 of the electromagnetic valve three r13 after being reversed, so that the valve core of the cartridge valve two r16 moves to the right, and the valve core of the cartridge valve three r17 moves to the left, so that the cartridge valve two r16 and the cartridge valve three r17 are in the closed state. In this way, the hydraulic oil of the oil inlet port P1 enters the cartridge valve one r15 from the interface z1 of the cartridge valve one r15, then pushes the valve core of the cartridge valve one r15 to move to the right, so that the cartridge valve one r15 is in the open state, and then the hydraulic oil flows out from the interface z3 of the cartridge valve one r15, flows to the interface A, flows back to the interface z7 of the cartridge valve four r18 through the loading motor r5, and pushes the valve core of the cartridge valve four r18 to move to the left, so that the cartridge valve four r18 is in the open state, and then the hydraulic oil entering the cartridge valve four r18 flows out from the interface z6 of the cartridge valve four r18, then flows to the oil return overflow valve r7, flows through the oil return filter r8 after passing through the oil return overflow valve r7, and finally flows back to the oil tank to form a complete circuit.

[0049] In the embodiment, when the reverse test of the loading motor r5 is needed, the interface e1 of the branch oil way one is connected with the interface c1 of the hydraulic pump one r1, the interface d1 of the hydraulic pump one r1 is connected with the oil inlet port P1 of the reversing module, the interface b1 and the interface b2 of the loading motor r5 are respectively connected with the interface A and the interface B of the reversing module, the hydraulic oil enters the first cartridge valve group r6 from the oil inlet port P1, and the electromagnetic valve two r12 and the electromagnetic valve four r14 in the electromagnetic valve group r10 are electrified at the same time. At this time, the hydraulic oil in the pilot pump group oil acts on the cartridge valve one r15 and the cartridge valve four r18 through the electromagnetic valve two r12 and the electromagnetic valve four r14 after being reversed. Since the electromagnetic valve two r12 and the electromagnetic valve four r14 are reversed, z8 of the cartridge valve two r15 and z9 of the cartridge valve three r18 flow back to the oil tank through v4 of the electromagnetic valve two r12 and v10 of the electromagnetic valve four r14 after being reversed, so that the valve core of the cartridge valve one r15 moves to the left, and the valve core of the cartridge valve four r18 moves to the right, so that the cartridge valve one r15 and the cartridge valve four r18 are in the closed state. In this way, the hydraulic oil of the oil inlet port P1 enters the cartridge valve three r17 from the interface z2 of the cartridge valve three r17, then pushes the valve core of the cartridge valve three r17 to move to the right, so that the cartridge valve three r17 is in the open state, and then the hydraulic oil flows out from the interface z12 of the cartridge valve three r17, flows to the interface B, flows back to the interface z4 of the cartridge valve two r16 through the loading motor r5 after passing through the interface A, and pushes the valve core of the cartridge valve two r16 to move to the left, so that the cartridge valve two r16 is in the open state, and then the hydraulic oil entering the cartridge valve two r16 flows out from the interface z5 of the cartridge valve four r18, then flows to the oil return overflow valve r7, flows through the oil return filter r8 after passing through the oil return overflow valve r7, and finally flows back to the oil tank to form a complete circuit.

[0050] After the commutation test of the motor module is performed and the test of the forward rotation and the reverse rotation reaches the requirement, the second ball valve r52 and the third ball valve r53 connected with the motor r5 are closed and loaded, the second ball valve r51 and the third ball valve r54 connected with the motor r5 are opened, then the hydraulic test of the loaded motor under different pressures is performed, in this embodiment, the test of the motor r5 under different hydraulic oil pressure values in the forward rotation is taken as an example for illustration, first, the pressure value of the overflow valve two w17 is adjusted, and the reversing valve one w11 is reversed, so that the interface T7 of the reversing valve one w11 communicates with the interface T8 of the reversing valve one w11, then the overflow valve two in the adjusting module is adjusted, so that the hydraulic oil of the adjusting oil way two acts on the interface z61 of the cartridge valve eight w4, the cartridge valve eight w4 is in the closed state, and acts on the interface z4 of the cartridge valve six w2, so that the cartridge valve six w2 is in the open state, the valve core of the cartridge valve six w2 is pushed to move downward, and then the hydraulic oil is communicated to the interface z2 of the cartridge valve five w1 through the second return oil way, so that the valve core of the cartridge valve five w1 moves upward to be in the closed state, at this time, the hydraulic oil of the second oil supply oil way acts on the interface z11 of the cartridge valve seven w3 through the one-way valve three w16, the valve core of the cartridge valve seven w3 is pushed to move upward, so that the cartridge valve seven w3 is in the open state, so that the hydraulic oil can enter the loading motor through the interface PA1, and then flow back to the interface z4 of the cartridge valve six w2 through the interface PB1 after passing through the loading motor, and then flow back to the oil tank through the second return oil way to form a complete loop.

[0051] When the loading motor r5 performs the negative steering, the hydraulic oil enters through the cartridge valve eight w4, and then the cartridge valve five and the cartridge valve eight are opened and a loop is formed.

[0052] In the oil return process of the process, before the hydraulic oil enters the loading motor, the reversing valve one w11 is reversed, so that the interface T7 of the reversing valve one w11 communicates with the interface T9 of the reversing valve one w11, so that the hydraulic oil can flow back to the oil tank, at the same time, the ball valve six w19 in the connecting oil way one is in the closed state, and the hydraulic oil flowing from the interface PB1 back to the interface z4 of the cartridge valve six w2 flows to the interface z2 of the cartridge valve five w1, at this time, the valve core of the cartridge valve five w1 moves upward to be in the closed state.

[0053] After the above process is completed, when different hydraulic oil pressure value tests need to be performed on the loading motor, the ball valve three w21 in the connecting oil way two is closed, the overflow valve two w6 in the adjusting module is adjusted, the hydraulic oil in the adjusting oil way one reaches the different hydraulic oil pressure values of the loading motor, the reversing valve two w5 is reversed, the interface T5 of the reversing valve two w5 communicates with the interface T3 of the reversing valve two w5, and then the hydraulic oil for changing the different hydraulic oil pressure value tests of the loading motor flows to the interface PA1 through the connecting oil way one. In the embodiment, since the loading motor is in the forward rotation state, most of the hydraulic oil in the adjusting oil way one flows to the interface PA1, such as 90% of the total amount of the hydraulic oil in the adjusting oil way one. A small part of the hydraulic oil in the adjusting oil way one (such as 10% of the total amount of the hydraulic oil in the adjusting oil way one) still flows to the interface z1 of the cartridge valve one w1 and is less than the pressure required for moving the valve core of the cartridge valve one w1 downward (the cartridge valve one w1 with a larger oil pressure starting pressure can be selected to realize that most of the oil pressure in the adjusting oil way one is input to the PA1 port), so the cartridge valve one w1 is still in the closed state at this time. Thus, after the hydraulic oil enters the loading motor through the interface PA1 and flows back to the cartridge valve group from the interface PB1, the hydraulic oil will pass through the interface z4 of the cartridge valve two w2 again, so that the cartridge valve two w2 continues to be in the open state, and the oil pressure of the z6 port of the cartridge valve two w2 is the same as that of the z4 port and thus the cartridge valve two w2 will not be closed. Then, the hydraulic oil flows from the interface z5 of the cartridge valve two w2 to the interface z2 of the cartridge valve one w1, so that the cartridge valve one w1 continues to be in the closed state, thereby directly avoiding the pressurized hydraulic oil from the oil supply oil way into the cartridge valve group to change the hydraulic oil pressure of the original oil supply oil way, protecting the cartridge valve group while meeting the requirements of the loading motor for multiple different hydraulic oil pressure value tests, so that the test results of the loading motor are more accurate.

Claims

1. A hydraulic control system for testing motor rotation and different applied pressure values, characterized in that: The system includes a reversing hydraulic system, a motor module, and a loading hydraulic system. The reversing hydraulic system includes an oil supply module and a reversing module. The oil supply module is connected to the oil inlet port P1 of the reversing module. The loading hydraulic system includes an adjustment module and a loading module. The adjustment module and the loading module are connected by two connecting oil circuits to form adjustment oil circuit one and adjustment oil circuit two, respectively. The motor module is connected to both the reversing module and the loading module. After the oil supply module supplies oil to the reversing module, the motor module completes the reversing test by controlling the energization or de-energization of different cartridge valves in the first cartridge valve group of the reversing module through the energization or de-energization of every two solenoid valves in the solenoid valve group. By controlling the energization or de-energization of different cartridge valves in the second cartridge valve group of the loading module through adjustment oil circuit one or adjustment oil circuit two, loading tests with different hydraulic oil pressure values ​​are achieved.

2. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 1, characterized in that: The reversing module includes an oil inlet port P1, interface A, interface B, a first cartridge valve group, a solenoid valve group, a return oil circuit, and a pilot pump group oil circuit. The oil inlet port P1 is connected to the first cartridge valve group. The motor module is connected to interface A and interface B respectively. Both interface A and interface B are connected to the first cartridge valve group. The pilot pump group oil circuit is connected to one end of different solenoid valves in the solenoid valve group. The solenoid valves in the solenoid valve group are connected to the oil tank. The first cartridge valve group includes four cartridge valves, and the solenoid valve group includes four solenoid valves. The other end of different solenoid valves in the solenoid valve group is connected to the control end of different cartridge valves in the first cartridge valve group. Each pair of solenoid valves in the solenoid valve group controls the different cartridge valves in the first cartridge valve group to close or open in an energized or de-energized state, so that the hydraulic oil flows from interface A through the motor module, then flows back to the first cartridge valve group through interface B, and then flows back to the oil tank through the return oil circuit.

3. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 1, characterized in that: The oil supply module includes an oil supply circuit, a hydraulic pump 1, and a hydraulic pump 2. Both hydraulic pump 1 and hydraulic pump 2 are connected to a drive device 1. One end of hydraulic pump 1 forms an interface c1, and one end of hydraulic pump 2 forms an interface c2. Both interfaces c1 and c2 are connected to the oil supply circuit. The other end of hydraulic pump 1 forms an interface d1, and the other end of hydraulic pump 2 forms an interface d2. The oil supply circuit includes a ball valve 1, a flexible joint, a branch oil circuit 1, and a branch oil circuit 2. One end of ball valve 1 is connected to an oil tank, and the other end of ball valve 1 is connected to one end of the flexible joint. The other end of the flexible joint is connected to branch oil circuit 1 and branch oil circuit 2, respectively. Branch oil circuit 1 includes ball valve 2 and interface e1, and branch oil circuit 2 includes ball valve 3 and interface e2. Interface c1 is connected to interface e1 or interface e2.

4. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 2, characterized in that: The first cartridge valve assembly includes cartridge valve one, cartridge valve two, cartridge valve three, and cartridge valve four. The oil inlet port P1 is connected to interface z1 of cartridge valve one and interface z2 of cartridge valve three, respectively. Interface z3 of cartridge valve one is connected to interface A and interface z4 of cartridge valve two, respectively. The return oil path is connected to interface z5 of cartridge valve two and interface z6 of cartridge valve four, respectively. Interface z12 of cartridge valve three is connected to interface z7 and interface B of cartridge valve four, respectively. The solenoid valve assembly includes solenoid valve one, solenoid valve two, solenoid valve three, and solenoid valve four. Interface v3 of solenoid valve one... The interface z10 of cartridge valve 2 is connected to the interface z8 of cartridge valve 1, the interface v6 of solenoid valve 2 is connected to the interface z11 of cartridge valve 2, the interface v12 of solenoid valve 4 is connected to the interface z9 of cartridge valve 4, the pilot pump group oil circuit is connected to the interface v2 of solenoid valve 1, the interface v5 of solenoid valve 2, the interface v8 of solenoid valve 3 and the interface v11 of solenoid valve 4 respectively, and the interfaces v1 of solenoid valve 1, v4 of solenoid valve 2, v7 of solenoid valve 3 and v10 of solenoid valve 4 are all connected to the oil tank.

5. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 2, characterized in that: The return oil circuit includes a return oil overflow valve and a return oil filter. One end of the return oil overflow valve is connected to the return oil filter, and the return oil filter is connected to the oil tank. The pilot pump group oil circuit includes a check valve, a hydraulic pump, and a ball valve. The hydraulic pump is connected to the drive device. One end of the check valve is connected to one end of the hydraulic pump, and the other end of the hydraulic pump is connected to one end of the ball valve. The other end of the ball valve is connected to the oil tank.

6. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 1, characterized in that: The loading module includes a second oil supply circuit, a first connecting oil circuit, a second connecting oil circuit, a second cartridge valve assembly, and a second return oil circuit. The second oil supply circuit is connected to one end of the second cartridge valve assembly. The second oil supply circuit includes a first overflow valve, one end of which is connected to one end of the second cartridge valve assembly. The other end of the second overflow valve is connected to the oil tank. The other end of the second cartridge valve assembly is connected to both the first connecting oil circuit and the second connecting oil circuit. The third end of the second cartridge valve assembly is connected to the second return oil circuit. The second return oil circuit is connected to the second oil supply circuit via a first reversing valve. The first connecting oil circuit is connected to the regulating module via a second reversing valve to form a first regulating oil circuit. The second connecting oil circuit is connected to the regulating module via a second reversing valve to form a second regulating oil circuit. The regulating module includes a second overflow valve, one end of which is connected to the oil tank. The other end of the second overflow valve is connected to a second reversing valve. The motor module is connected to interface PA1 in the first connecting oil circuit and interface PB1 in the second connecting oil circuit.

7. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 1, characterized in that: The motor module includes a test motor and a loading motor. The test motor and the loading motor are connected by a torque tachometer. The two ends of the test motor are respectively provided with interface a1 and interface a2, and the two ends of the loading motor are respectively provided with interface b1, interface b3 and interface b2, interface b4.

8. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 6, characterized in that: The second oil supply circuit includes a ball valve five, a second flexible joint, a hydraulic pump four, and a check valve three. The hydraulic pump four is connected to the drive device one. One end of the ball valve five is connected to the oil tank, and the other end of the ball valve five is connected to one end of the second flexible joint. The other end of the second flexible joint is connected to one end of the hydraulic pump four, and the other end of the hydraulic pump four is connected to one end of the check valve three. The other end of the check valve three is connected to the relief valve one, the directional valve one, and the second cartridge valve group, respectively. The second oil return circuit includes a second oil return relief valve, a directional valve one, and an oil return filter. One end of the second oil return relief valve is connected to the second cartridge valve group, and the other end of the second oil return relief valve is connected to the interface T7 of the directional valve one. The interface T9 of the directional valve one is connected to the oil return filter, and the oil return filter is connected to the oil tank.

9. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 6, characterized in that: The connecting oil circuit includes a flow meter, a ball valve, an interface T1, and an interface PA1. Interface PA1 is connected to one end of the ball valve and the second cartridge valve group, respectively. The other end of the ball valve is connected to one end of the flow meter, and the other end of the flow meter is connected to the interface T1. The second connecting oil circuit includes a flow meter, a ball valve, an interface T2, and an interface PB1. The interface PB1 is connected to one end of the ball valve and the second cartridge valve assembly, respectively. The other end of the ball valve is connected to one end of the flow meter, and the other end of the flow meter is connected to the interface T2.

10. The hydraulic control system for testing motor steering and different applied pressure values ​​according to claim 1, characterized in that: The regulating module includes a second directional control valve, a fifth hydraulic pump, a second check valve, and an eighth ball valve. Interface T1 is connected to interface T3 of the second directional control valve; interface T2 is connected to interface T4 of the second directional control valve; interface T5 of the second directional control valve is connected to one end of both the second relief valve and the second check valve; interface T6 of the second directional control valve and the other end of the second relief valve are both connected to an oil tank; the other end of the second check valve is connected to one end of the fifth hydraulic pump; the other end of the fifth hydraulic pump is connected to one end of the eighth ball valve; and the other end of the eighth ball valve is connected to an oil tank. The second cartridge valve assembly includes cartridge valve five and cartridge valve six. Cartridge valves seven and eight are connected to the following ports: PA1 is connected to port z1 of cartridge valve five, port z9 of cartridge valve seven, and port z10 of cartridge valve seven, respectively; port z3 of cartridge valve five is connected to port z2 of cartridge valve five, port z5 of cartridge valve six, port z6 of cartridge valve six, and the second return oil circuit, respectively; port z4 of cartridge valve six is ​​connected to port PB1, port z61 of cartridge valve eight, and port z7 of cartridge valve eight, respectively; and ports z11 of cartridge valve seven and port z8 of cartridge valve eight are both connected to the other end of check valve three.

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