A hydraulic power device for a plate pumping system and a plate pumping control method

Abstract

The present invention provides a hydraulic power device for a pumping plate system and a pumping plate control method, wherein the device comprises a first hydraulic pump driven by an electric motor, a control valve group and an accumulator; the control valve group comprises a one-way valve, a first unloading valve, a proportional relief valve, a proportional servo valve and a second unloading valve; the first end of the first hydraulic pump is connected to an oil tank, and the second end is connected to an inlet of the one-way valve and a first end of the first unloading valve; the outlet of the one-way valve is connected to a first end of the proportional relief valve, an oil inlet of a control end of the proportional servo valve, an accumulator and a first end of the second unloading valve; the second end of the first unloading valve is connected to an oil tank; the second end of the proportional relief valve is connected to an oil tank; the execution end of the proportional servo valve is connected to an oil port of an execution cylinder of the pumping plate system, and the execution cylinder is used to push the pumping plate of the pumping plate system; the control end oil outlet of the proportional servo valve is connected to an oil tank; the second end of the second unloading valve is connected to an oil tank, and can provide a power energy source capable of producing instantaneous high pressure for the pumping plate.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic power technology, and in particular to a hydraulic power device for a pumping plate system and a pumping plate control method. Background Art

[0002] Rainy and snowy weather often causes slippery roads, which brings great challenges to driving. Under such conditions, the wheels are prone to spinning and lack of grip when driving, increasing the risk of accidents. Especially when making sharp turns, braking or accelerating, the stability of the vehicle will be significantly reduced, which may lead to serious traffic accidents. In this context, we provide a simulated ice surface system. Among them, the simulated ice surface system can simulate the dynamic performance of the vehicle under different degrees of slipperiness and test its driving performance. This experiment can not only help engineers and researchers better understand the behavior of cars under complex weather conditions, but also provide important data support for automakers to improve the safety design of vehicles. In addition, the simulated ice surface system can also be used to train drivers for safe driving control. In a safe and controllable environment, drivers can learn how to cope with the challenges of slippery roads, improve their ability to deal with emergencies, and reduce the probability of accidents. It can be seen that the simulated ice surface system plays a vital role in improving road safety, optimizing vehicle design and enhancing driver training. The power system, as the core component of the simulated ice surface system, is responsible for the power control of the pumping plate in the pumping plate system used to simulate vehicle slippage. Therefore, how to design a power device for the plate extraction system to meet the needs of simulating vehicle skidding in the simulated ice surface system is the key. Summary of the invention

[0003] The invention provides a hydraulic power device for a plate-pulling system and a plate-pulling control method, which are used to provide effective and accurate power control for the plate-pulling system in a simulated ice surface system.

[0004] The present invention provides a hydraulic power device for a pumping plate system, comprising:

[0005] A first hydraulic pump driven by an electric motor, a control valve group and an accumulator; the control valve group includes a one-way valve, a first unloading valve, a proportional relief valve, a proportional servo valve and a second unloading valve;

[0006] The first end of the first hydraulic pump is connected to the oil tank, and the second end is connected to the inlet of the one-way valve and the first end of the first unloading valve;

[0007] The outlet of the one-way valve is connected to the first end of the proportional relief valve, the control end oil inlet of the proportional servo valve, the accumulator and the first end of the second unloading valve;

[0008] The second end of the first unloading valve is connected to the oil tank;

[0009] The second end of the proportional relief valve is connected to the oil tank;

[0010] The actuating end of the proportional servo valve is connected to the oil port of the actuating cylinder of the pumping plate system, and the actuating cylinder is used to push the pumping plate of the pumping plate system; the control end oil outlet of the proportional servo valve is connected to the oil tank;

[0011] The second end of the second unloading valve is connected to the oil tank.

[0012] According to a hydraulic power device for a pumping plate system provided by the present invention, the hydraulic power device further comprises a second hydraulic pump driven by the electric motor; the control valve group further comprises a pressure control relief valve, a third unloading valve, an electromagnetic reversing valve, a hydraulically controlled one-way valve group, and a relief valve group;

[0013] Wherein, the first end of the second hydraulic pump is connected to the oil tank, and the second end is connected to the first end of the pressure control relief valve, the first end of the third unloading valve and the control end oil inlet of the electromagnetic reversing valve;

[0014] The second end of the pressure control relief valve is connected to the oil tank;

[0015] The second end of the third unloading valve is connected to the oil tank;

[0016] The actuating end of the electromagnetic reversing valve is connected to the oil port of the actuating cylinder via the hydraulically controlled one-way valve group, and the control end oil outlet of the electromagnetic reversing valve is connected to the oil tank;

[0017] The overflow valve group is connected to the oil port of the actuator cylinder and the oil tank respectively.

[0018] According to a hydraulic power device for a pumping plate system provided by the present invention, the second end of the first hydraulic pump is connected to the inlet of the one-way valve and the first end of the first unloading valve via a first high-pressure filter; the second end of the second hydraulic pump is connected to the first end of the pressure control overflow valve, the first end of the third unloading valve and the control end oil inlet of the electromagnetic reversing valve via a second high-pressure filter.

[0019] According to a hydraulic power device for a pumping plate system provided by the present invention, the second end of the first unloading valve, the control end oil outlet of the proportional servo valve, the second end of the pressure control relief valve, the second end of the third unloading valve, the control end oil outlet of the electromagnetic reversing valve and the relief valve group are all connected to the oil tank via a radiator and a return oil filter.

[0020] According to a hydraulic power device for a pumping plate system provided by the present invention, the control valve group is integrated on a control valve block, and the control valve block is installed in a pumping plate pit of the pumping plate system.

[0021] The present invention also provides a pumping plate control method based on any one of the above-mentioned hydraulic power devices for a pumping plate system, comprising:

[0022] During the accumulator charging stage, the first unloading valve and the second unloading valve of the control valve group are controlled to be closed, the proportional servo valve is controlled to be in a neutral position, and the threshold pressure of the proportional relief valve is set based on a first preset pressure; wherein the first preset pressure is determined based on the weight of the pumping plate in the pumping plate system, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate;

[0023] Based on the first hydraulic pump, the hydraulic oil is allowed to flow from the oil tank into the accumulator through the one-way valve of the control valve group.

[0024] According to a plate pumping control method provided by the present invention, the plate pumping control method further comprises:

[0025] When the hydraulic oil pressure in the accumulator reaches the first preset pressure, the accumulator pressure maintaining stage is controlled to be entered, the first unloading valve is controlled to be opened, the second unloading valve is controlled to be closed, and the proportional servo valve is controlled to be in the middle position;

[0026] Based on the first hydraulic pump, the hydraulic oil flows from the oil tank back to the oil tank through the first unloading valve of the control valve group.

[0027] According to a plate pumping control method provided by the present invention, the plate pumping control method further comprises:

[0028] When receiving the pumping plate movement signal, the control enters the pumping plate movement phase, controls the closing of the first unloading valve and the second unloading valve, and opens the proportional servo valve based on a preset opening; the preset opening is determined based on the first preset pressure, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate;

[0029] Based on the release of hydraulic oil from the accumulator, the hydraulic oil enters the actuator cylinder of the pumping system through the proportional servo valve and then flows back to the oil tank through the proportional servo valve;

[0030] Control enters the accumulator charging phase.

[0031] According to a plate pumping control method provided by the present invention, the plate pumping control method further comprises:

[0032] After receiving the pumping plate reset signal, the control enters the pumping plate reset stage, controls the third unloading valve of the control valve group to close, controls the electromagnetic reversing valve to open, sets the threshold pressure of the pressure control relief valve based on the second preset pressure, and sets the threshold pressure of the relief valve group based on the preset safety pressure value; wherein the second preset pressure is determined based on the weight of the pumping plate in the pumping plate system;

[0033] Based on the second hydraulic pump, the hydraulic oil flows from the oil tank through the electromagnetic reversing valve and the hydraulically controlled one-way valve group of the control valve group into the actuator cylinder of the pumping system, and then flows back to the oil tank through the hydraulically controlled one-way valve group and the electromagnetic reversing valve.

[0034] According to a plate pumping control method provided by the present invention, the plate pumping control method further comprises:

[0035] After receiving the pumping plate reset success signal, the third unloading valve is controlled to open and the electromagnetic reversing valve is controlled to be in the middle position;

[0036] Based on the second hydraulic pump, the hydraulic oil flows from the oil tank back to the oil tank through the third unloading valve of the control valve group.

[0037] The present invention provides a hydraulic power device for a pumping plate system and a pumping plate control method, the hydraulic power device includes a first hydraulic pump driven by an electric motor, a control valve group and an accumulator; the control valve group includes a one-way valve, a first unloading valve, a proportional relief valve, a proportional servo valve and a second unloading valve; the first end of the first hydraulic pump is connected to the oil tank, and the second end is connected to the inlet of the one-way valve and the first end of the first unloading valve; the outlet of the one-way valve is connected to the first end of the proportional relief valve, the control end oil inlet of the proportional servo valve, the accumulator and the first end of the second unloading valve; the second end of the first unloading valve is connected to the oil tank; the second end of the proportional relief valve is connected to the oil tank; the execution end of the proportional servo valve is connected to the oil port of the execution cylinder of the pumping plate system, and the execution cylinder is used to push the pumping plate of the pumping plate system; the control end oil outlet of the proportional servo valve is connected to the oil tank; the second end of the second unloading valve is connected to the oil tank, which can provide the pumping plate with a power energy source that can produce instantaneous high pressure, thereby effectively and accurately applying a preset lateral acceleration to the vehicle carried by the pumping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1It is a structural schematic diagram of a hydraulic power device for a pumping plate system provided by the present invention;

[0040] Figure 2 It is a structural schematic diagram of the low-pressure system provided by the present invention;

[0041] Figure 3 It is a flow chart of the plate extraction control method provided by the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Figure 1 Schematic diagram of the structure of a hydraulic power device for a pumping plate system provided by the present invention. Figure 1 As shown, the device comprises:

[0044] A first hydraulic pump 110 driven by an electric motor, a control valve group 120 and an accumulator 130; the control valve group 120 includes a check valve 1, a first unloading valve 2, a proportional relief valve 3, a proportional servo valve 4 and a second unloading valve 5;

[0045] The first end of the first hydraulic pump 110 is connected to the oil tank 140, and the second end is connected to the inlet of the one-way valve 1 and the first end of the first unloading valve 2; wherein, for the one-way valve 1, the hydraulic oil can only flow from the inlet of the one-way valve 1 to the outlet;

[0046] The outlet of the one-way valve 1 is connected to the first end of the proportional relief valve 3, the control end oil inlet of the proportional servo valve 4 (i.e., the P port in the figure), the accumulator 130, and the first end of the second unloading valve 5;

[0047] The second end of the first unloading valve 2 is connected to the oil tank 140;

[0048] The second end of the proportional relief valve 3 is connected to the oil tank 140;

[0049] The actuator end of the proportional servo valve 4 (i.e., ports A and B in the figure) is connected to the oil ports A' and B' of the actuator cylinder of the pumping plate system, controlling the hydraulic oil to enter the actuator cylinder and allowing the hydraulic oil to flow back from the actuator cylinder to the proportional servo valve, wherein the actuator cylinder is used to push the pumping plate of the pumping plate system; the control end oil outlet of the proportional servo valve 4 is connected to the oil tank 140; it should be noted that the T port of the proportional servo valve is an oil return port, which is used to discharge the hydraulic oil flowing back from the actuator cylinder back to the oil tank during the pumping plate movement stage; the Y port is an oil drain port, which is used to return the pilot control oil to the oil tank; the X port is the pilot oil external control port, which serves as the power to push the second-stage main valve core, and controls the opening of the main valve core through the first-stage pilot valve to help achieve precise control.

[0050] The second end of the second unloading valve 5 is connected to the oil tank 140 .

[0051] Specifically, in the simulated ice surface system, the pumping plate system is used to provide a lateral acceleration to the vehicle when the vehicle drives onto the pumping plate of the pumping plate system to simulate the scene of the vehicle slipping in rainy and snowy days, so a power control device is required to control the movement of the pumping plate. It should be noted that since the vehicle is traveling at a high speed, in order to effectively and accurately apply the preset lateral acceleration to the vehicle, it is necessary to provide a power source that can produce instantaneous high pressure for the pumping plate. Therefore, a hydraulic power device can be provided for the pumping plate system, and the hydraulic power device includes a first hydraulic pump 110 driven by an electric motor, a control valve group 120 and an accumulator 130. Among them, the first hydraulic pump 110, the control valve group 120 and the accumulator 130 can form a high-pressure system, and the first hydraulic pump 110 and the control valve group 120 are used to charge the accumulator 130 in the charging stage, so that at the moment when the pumping plate needs to be moved, the accumulator can provide the actuator cylinder of the pumping plate with instantaneous high-pressure and high-flow hydraulic oil to quickly move the pumping plate and provide the preset lateral acceleration. In some embodiments, the actuator cylinder may be a double-piston-rod hydraulic cylinder.

[0052] Here, the control valve group 120 in the high pressure system includes a one-way valve 1 , a first unloading valve 2 , a proportional relief valve 3 , a proportional servo valve 4 and a second unloading valve 5 .

[0053] In the accumulator charging stage, the first unloading valve 2 and the second unloading valve 5 of the control valve group 120 are controlled to be closed, the proportional servo valve 4 is controlled to be in the middle position, and the threshold pressure of the proportional relief valve 3 is set based on the first preset pressure. Here, the first preset pressure can be determined based on the weight of the pumping plate in the pumping plate system, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate. The greater the weight of the pumping plate or the weight of the vehicle driving into the pumping plate, and the higher the lateral acceleration of the pumping plate, the greater the first preset pressure. When charging the accumulator 130, the hydraulic oil can enter the accumulator 130 from the oil tank 140 through the one-way valve 1 of the control valve group 120 based on the first hydraulic pump 110. Specifically, the first hydraulic pump 110 is driven by the electric motor to suck oil from the oil tank 140. Since the hydraulic oil can flow from the inlet to the outlet of the one-way valve 1, the hydraulic oil can flow into the accumulator 130 via the one-way valve 1. In addition, since the first unloading valve 2 and the second unloading valve 5 are closed, the proportional servo valve 4 is in the middle position, and the current system pressure has not reached the first preset pressure, the proportional relief valve 3 is closed. Therefore, the hydraulic oil will not flow from the first unloading valve 2, the second unloading valve 5, the proportional relief valve 3 or the proportional servo valve 4 into the oil cylinder or the oil tank, ensuring that enough hydraulic oil flows into the accumulator to quickly charge the accumulator.

[0054] Considering that the timing and frequency of the pumping plate movement are not fixed, the hydraulic oil in the accumulator 130 may not be released immediately to push the pumping plate after accumulating hydraulic oil with sufficient pressure in the accumulator 130, so it is necessary to stop charging the accumulator 130 to save energy, improve efficiency, and reduce the heating of the hydraulic oil. However, if the accumulator 130 is stopped from charging by stopping the first hydraulic pump 110, the first hydraulic pump 110 will be frequently started and stopped, which will easily shorten the life of the components in the first hydraulic pump; if the first hydraulic pump 110 is kept working uninterruptedly, the first hydraulic pump 110 will always work with load, and the energy generated will be wasted. Therefore, in order to improve the safety and service life of the hydraulic power device, when the hydraulic oil pressure in the accumulator 130 reaches the first preset pressure (i.e., charging is completed) and no pumping plate movement signal is received, the hydraulic power device can be controlled to enter the accumulator pressure holding stage, the purpose of which is to maintain the oil pressure in the accumulator 130 and make the first hydraulic pump run at no load to avoid energy waste. Specifically, the first unloading valve 2 can be controlled to be opened, the second unloading valve 5 can be closed, and the proportional servo valve 4 can be controlled to be in the middle position. At this time, based on the first hydraulic pump 110 sucking oil from the oil tank 140, the hydraulic oil flows back to the oil tank 140 from the oil tank 140 through the first unloading valve 2 of the control valve group 120, and because the second unloading valve 5 is closed, the proportional servo valve 4 is in the middle position, and the current system pressure does not exceed the first preset pressure, the proportional overflow valve 3 is closed, so the hydraulic oil will not flow from the second unloading valve 5, the proportional overflow valve 3 or the proportional servo valve 4 into the oil cylinder or the oil tank; in addition, the setting of the one-way valve 1 prevents the hydraulic oil in the accumulator 130 from passing through the one-way valve 1, so the hydraulic oil in the accumulator will not flow from the one-way valve 1, the second unloading valve 5, the proportional overflow valve 3 or the proportional servo valve 4 into the oil cylinder or the oil tank, ensuring the pressure stability in the accumulator 130.

[0055] It should be noted that, in some embodiments, a radiator can be provided before the oil tank 140, so that all the hydraulic oil flowing back to the oil tank 140 is cooled through the radiator to ensure the safety of the hydraulic power device. On this basis, combined with the above-mentioned accumulator pressure holding stage, not only can the first hydraulic pump 110 be operated without load during the working interval (i.e., the time when the pumping plate does not need to move) to reduce energy consumption, but also the flow rate of hydraulic oil flowing through the radiator can be increased, and when the oil temperature is high, the heat exchange amount can be increased to improve the heat exchange efficiency.

[0056] When the hydraulic power device receives the pumping plate movement signal, it enters the pumping plate movement stage, at which time the first unloading valve 2 and the second unloading valve 5 are controlled to be closed, and the proportional servo valve 4 is opened based on the preset opening. The preset opening is determined based on the first preset pressure, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate. Here, the first preset pressure represents the energy that the accumulator can provide, and the weight of the vehicle driving into the pumping plate and the lateral acceleration of the pumping plate represent the energy required for the pumping plate to move. Therefore, the opening of the proportional servo valve 4 can be controlled according to the first preset pressure, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate, so that the pumping plate carrying the vehicle can reach the preset lateral acceleration of the pumping plate within the predetermined displacement. The accumulator 130 is opened to release the hydraulic oil, and the accumulator 130 can provide instantaneous high-pressure and high-flow hydraulic oil, so that the high-pressure and high-flow hydraulic oil enters the actuator cylinder of the pumping plate system through the proportional servo valve 4, pushes the piston rod of the actuator cylinder to push the pumping plate, and the hydraulic oil in the actuator cylinder will flow back to the oil tank 140 through the proportional servo valve 4. It should be noted that the proportional servo valve 4 can control the flow direction of the hydraulic oil in the actuator cylinder to control the moving direction of the pumping plate. After the hydraulic oil in the accumulator 130 is released, the hydraulic power device can continue to be controlled to enter the accumulator charging stage.

[0057] It should be noted that when the hydraulic power device needs to be repaired or needs to be shut down for a long period of time, the second unloading valve 5 can be controlled to open to release the pressure in the accumulator.

[0058] After the pumping plate moves, it needs to be reset to provide lateral acceleration for the next vehicle. In some embodiments, the above-mentioned high-pressure system can be used to reset the pumping plate. However, considering that when the pumping plate moves, it is necessary to move the pumping plate carrying the vehicle at a certain acceleration in a short period of time, so it is necessary to provide instantaneous high-pressure and high-flow hydraulic oil, and there is no such requirement when resetting the pumping plate. Therefore, the pressure required for resetting the pumping plate is much less than the pressure required for moving the pumping plate. Therefore, in order to save energy, an additional low-pressure system can be designed for resetting the pumping plate. Specifically, if Figure 2As shown, the low-pressure system may include a second hydraulic pump 210 driven by the same motor, a pressure-controlled relief valve 6, a third unloading valve 7, an electromagnetic reversing valve 8, a hydraulically-controlled check valve group 9, and a relief valve group 10. The pressure-controlled relief valve 6, the third unloading valve 7, the electromagnetic reversing valve 8, the hydraulically-controlled check valve group 9, and the relief valve group 10 are integrated on the control valve group 120. Among them, the first end of the second hydraulic pump 210 is connected to the oil tank 140, and the second end is connected to the first end of the pressure control relief valve 6, the first end of the third unloading valve 7 and the control end oil inlet of the electromagnetic reversing valve 8; the second end of the pressure control relief valve 6 is connected to the oil tank 140; the second end of the third unloading valve 7 is connected to the oil tank 140; the execution end of the electromagnetic reversing valve 8 is connected to the oil ports A' and B' of the execution cylinder via the hydraulically controlled one-way valve group 9, and the control end oil outlet of the electromagnetic reversing valve 8 is connected to the oil tank 140; the relief valve group 10 is respectively connected to the oil ports A' and B' of the execution cylinder and the oil tank 140.

[0059] Among them, after receiving the pumping plate reset signal, the hydraulic power device enters the pumping plate reset stage, controls the third unloading valve 7 to close, controls the electromagnetic reversing valve 8 to open, and sets the threshold pressure of the pressure control relief valve 6 based on the second preset pressure, and sets the threshold pressure of the relief valve group 10 based on the preset safety pressure value. Here, the second preset pressure is determined based on the weight of the pumping plate in the pumping plate system. The heavier the pumping plate, the greater the second preset pressure, and the second preset pressure is less than the first preset pressure. The relief valve group 10 serves as a cylinder safety valve to protect the pressure of the two chambers of the actuator cylinder. When the pumping plate is reset, the second hydraulic pump 210 sucks oil from the oil tank 140, so that the hydraulic oil enters the actuator cylinder from the oil tank 140 through the electromagnetic reversing valve 8 and the hydraulic control one-way valve group 9, pushes the piston rod of the actuator cylinder to push the pumping plate, and the hydraulic oil in the actuator cylinder flows back to the oil tank 140 through the hydraulic control one-way valve group and the electromagnetic reversing valve 8. It should be noted that the electromagnetic reversing valve 8 can control the flow direction of the hydraulic oil in the actuator cylinder and thus control the moving direction of the pumping plate to ensure that the pumping plate is reset.

[0060] After receiving the pumping plate reset success signal, the third unloading valve 7 can be controlled to open and the electromagnetic reversing valve 8 can be controlled to be in the middle position. In this way, the second hydraulic pump 210 can be operated without load. At this time, based on the second hydraulic pump 210 sucking oil from the oil tank 140, the hydraulic oil can flow back to the oil tank 140 from the oil tank 140 through the third unloading valve 7.

[0061] In some embodiments, Figure 1 As shown, the second end of the first hydraulic pump 110 is connected to the inlet of the one-way valve 1 and the first end of the first unloading valve 2 via the first high-pressure filter 11; Figure 2 As shown, the second end of the second hydraulic pump 210 is connected to the first end of the pressure control relief valve 6 , the first end of the third unloading valve 7 and the control end oil inlet of the electromagnetic reversing valve 8 via the second high-pressure filter 12 .

[0062] In some embodiments, Figure 1 and Figure 2 As shown, the second end of the first unloading valve 2, the control end oil outlet of the proportional servo valve 4, the second end of the pressure control relief valve 6, the second end of the third unloading valve 7, the control end oil outlet of the electromagnetic reversing valve 8 and the relief valve group 10 are all connected to the oil tank 140 via the radiator 13 and the return oil filter 14. The second end of the proportional relief valve 3 and the second end of the second unloading valve 5 are directly connected to the oil tank 140.

[0063] In other embodiments, the control valve group is integrated on the control valve block, which is compact and convenient for installing the control valve block in the pumping plate pit of the pumping plate system, so as to shorten the distance between the control valve group and the actuator cylinder and ensure the control effect.

[0064] In summary, the device provided by the embodiment of the present invention includes a first hydraulic pump driven by an electric motor, a control valve group and an accumulator; the control valve group includes a one-way valve, a first unloading valve, a proportional relief valve, a proportional servo valve and a second unloading valve; the first end of the first hydraulic pump is connected to the oil tank, and the second end is connected to the inlet of the one-way valve and the first end of the first unloading valve; the outlet of the one-way valve is connected to the first end of the proportional relief valve, the control end oil inlet of the proportional servo valve, the accumulator and the first end of the second unloading valve; the second end of the first unloading valve is connected to the oil tank; the second end of the proportional relief valve is connected to the oil tank; the actuator end of the proportional servo valve is connected to the oil port of the actuator cylinder of the pumping plate system, and the actuator cylinder is used to push the pumping plate of the pumping plate system; the control end oil outlet of the proportional servo valve is connected to the oil tank; the second end of the second unloading valve is connected to the oil tank, which can provide the pumping plate with a power energy that can produce instantaneous high pressure, thereby effectively and accurately applying a preset lateral acceleration to the vehicle carried by the pumping plate.

[0065] The following is a description of the pumping plate control method provided by the present invention. The pumping plate control method described below and the hydraulic power device for the pumping plate system described above can be referred to each other.

[0066] Based on any of the above embodiments, Figure 3 is a flow chart of the pumping plate control method provided by the present invention, which is based on the hydraulic power device for the pumping plate system. Figure 3 As shown, the method includes:

[0067] Step 310, during the accumulator charging stage, the first unloading valve and the second unloading valve of the control valve group are controlled to be closed, the proportional servo valve is controlled to be in a neutral position, and a threshold pressure of the proportional relief valve is set based on a first preset pressure; wherein the first preset pressure is determined based on the weight of the pumping plate in the pumping plate system, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate;

[0068] Step 320 : Based on the first hydraulic pump, the hydraulic oil flows from the oil tank through the one-way valve of the control valve group into the accumulator.

[0069] Based on any of the above embodiments, the plate pumping control method further includes:

[0070] When the hydraulic oil pressure in the accumulator reaches the first preset pressure, the accumulator pressure maintaining stage is controlled to be entered, the first unloading valve is controlled to be opened, the second unloading valve is controlled to be closed, and the proportional servo valve is controlled to be in the middle position;

[0071] Based on the first hydraulic pump, the hydraulic oil flows from the oil tank back to the oil tank through the first unloading valve of the control valve group.

[0072] Based on any of the above embodiments, the plate pumping control method further includes:

[0073] When receiving the pumping plate movement signal, the control enters the pumping plate movement phase, controls the closing of the first unloading valve and the second unloading valve, and opens the proportional servo valve based on a preset opening; the preset opening is determined based on the first preset pressure, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate;

[0074] Based on the release of hydraulic oil from the accumulator, the hydraulic oil enters the actuator cylinder of the pumping system through the proportional servo valve and then flows back to the oil tank through the proportional servo valve;

[0075] Control enters the accumulator charging phase.

[0076] Based on any of the above embodiments, the plate pumping control method further includes:

[0077] After receiving the pumping plate reset signal, the control enters the pumping plate reset stage, controls the third unloading valve of the control valve group to close, controls the electromagnetic reversing valve to open, sets the threshold pressure of the pressure control relief valve based on the second preset pressure, and sets the threshold pressure of the relief valve group based on the preset safety pressure value; wherein the second preset pressure is determined based on the weight of the pumping plate in the pumping plate system;

[0078] Based on the second hydraulic pump, the hydraulic oil flows from the oil tank through the electromagnetic reversing valve and the hydraulically controlled one-way valve group of the control valve group into the actuator cylinder of the pumping system, and then flows back to the oil tank through the hydraulically controlled one-way valve group and the electromagnetic reversing valve.

[0079] Based on any of the above embodiments, the plate pumping control method further includes:

[0080] After receiving the pumping plate reset success signal, the third unloading valve is controlled to open and the electromagnetic reversing valve is controlled to be in the middle position;

[0081] Based on the second hydraulic pump, the hydraulic oil flows from the oil tank back to the oil tank through the third unloading valve of the control valve group.

[0082] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0083] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic power device for a pumping plate system, characterized in that: include: A first hydraulic pump driven by an electric motor, a control valve group and an accumulator; the control valve group includes a one-way valve, a first unloading valve, a proportional relief valve, a proportional servo valve and a second unloading valve; The first end of the first hydraulic pump is connected to the oil tank, and the second end is connected to the inlet of the one-way valve and the first end of the first unloading valve; The outlet of the one-way valve is connected to the first end of the proportional relief valve, the control end oil inlet of the proportional servo valve, the accumulator and the first end of the second unloading valve; The second end of the first unloading valve is connected to the oil tank; The second end of the proportional relief valve is connected to the oil tank; The actuating end of the proportional servo valve is connected to the oil port of the actuating cylinder of the pumping plate system, and the actuating cylinder is used to push the pumping plate of the pumping plate system; the control end oil outlet of the proportional servo valve is connected to the oil tank; The second end of the second unloading valve is connected to the oil tank.

2. The hydraulic power device for the pumping plate system according to claim 1, characterized in that: The hydraulic power device further includes a second hydraulic pump driven by the electric motor; the control valve group further includes a pressure control relief valve, a third unloading valve, an electromagnetic reversing valve, a hydraulically controlled one-way valve group, and a relief valve group; Wherein, the first end of the second hydraulic pump is connected to the oil tank, and the second end is connected to the first end of the pressure control relief valve, the first end of the third unloading valve and the control end oil inlet of the electromagnetic reversing valve; The second end of the pressure control relief valve is connected to the oil tank; The second end of the third unloading valve is connected to the oil tank; The actuating end of the electromagnetic reversing valve is connected to the oil port of the actuating cylinder via the hydraulically controlled one-way valve group, and the control end oil outlet of the electromagnetic reversing valve is connected to the oil tank; The overflow valve group is connected to the oil port of the actuator cylinder and the oil tank respectively.

3. The hydraulic power device for the pumping system according to claim 2, characterized in that: The second end of the first hydraulic pump is connected to the inlet of the one-way valve and the first end of the first unloading valve via a first high-pressure filter; the second end of the second hydraulic pump is connected to the first end of the pressure control overflow valve, the first end of the third unloading valve and the control end oil inlet of the electromagnetic reversing valve via a second high-pressure filter.

4. The hydraulic power device for the pumping plate system according to claim 2, characterized in that: The second end of the first unloading valve, the second end of the pressure control relief valve, the second end of the third unloading valve, the control end oil outlet of the electromagnetic reversing valve and the relief valve group are all connected to the oil tank via a radiator and a return oil filter.

5. The hydraulic power device for a pumping plate system according to claim 1 or 2, characterized in that: The control valve group is integrated on a control valve block, and the control valve block is installed in a pumping plate pit of the pumping plate system.

6. A pumping plate control method based on the hydraulic power device for a pumping plate system according to any one of claims 2 to 4, characterized in that: include: During the accumulator charging stage, the first unloading valve and the second unloading valve of the control valve group are controlled to be closed, the proportional servo valve is controlled to be in a neutral position, and the threshold pressure of the proportional relief valve is set based on a first preset pressure; wherein the first preset pressure is determined based on the weight of the pumping plate in the pumping plate system, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate; Based on the first hydraulic pump, the hydraulic oil is allowed to flow from the oil tank into the accumulator through the one-way valve of the control valve group.

7. The plate pumping control method according to claim 6, characterized in that: The plate pumping control method also includes: When the hydraulic oil pressure in the accumulator reaches the first preset pressure, the accumulator pressure maintaining stage is controlled to be entered, the first unloading valve is controlled to be opened, the second unloading valve is controlled to be closed, and the proportional servo valve is controlled to be in the middle position; Based on the first hydraulic pump, the hydraulic oil flows from the oil tank back to the oil tank through the first unloading valve of the control valve group.

8. The plate pumping control method according to claim 6, characterized in that: The plate pumping control method also includes: When receiving the pumping plate movement signal, the control enters the pumping plate movement phase, controls the closing of the first unloading valve and the second unloading valve, and opens the proportional servo valve based on a preset opening; the preset opening is determined based on the first preset pressure, the weight of the vehicle driving into the pumping plate, and the lateral acceleration of the pumping plate; Based on the release of hydraulic oil from the accumulator, the hydraulic oil enters the actuator cylinder of the pumping system through the proportional servo valve and then flows back to the oil tank through the proportional servo valve; Control enters the accumulator charging phase.

9. The plate pumping control method according to claim 6, characterized in that: The plate pumping control method also includes: After receiving the pumping plate reset signal, the control enters the pumping plate reset stage, controls the third unloading valve of the control valve group to close, controls the electromagnetic reversing valve to open, sets the threshold pressure of the pressure control relief valve based on the second preset pressure, and sets the threshold pressure of the relief valve group based on the preset safety pressure value; wherein the second preset pressure is determined based on the weight of the pumping plate in the pumping plate system; Based on the second hydraulic pump, the hydraulic oil flows from the oil tank through the electromagnetic reversing valve and the hydraulically controlled one-way valve group of the control valve group into the actuator cylinder of the pumping system, and then flows back to the oil tank through the hydraulically controlled one-way valve group and the electromagnetic reversing valve.

10. The plate pumping control method according to claim 9, characterized in that: The plate pumping control method also includes: After receiving the pumping plate reset success signal, the third unloading valve is controlled to open and the electromagnetic reversing valve is controlled to be in the middle position; Based on the second hydraulic pump, the hydraulic oil flows from the oil tank back to the oil tank through the third unloading valve of the control valve group.

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