Multi-split high-pressure servo oil source

Abstract

The invention provides a multi-split high-pressure servo oil source, and relates to the technical field of mechanical testing. The multi-split high-pressure servo oil source comprises an oil tank pump set, a main valve set, a sandwich valve set, a first main engine and a second main engine, the oil tank pump set is mainly used for providing basic power for overall operation of the oil source, the main valve set is mainly used for adjusting overall pressure and flow of the oil source, and the sandwich valve set is mainly used for being connected with multiple sets of main engines. Through a multi-split expansion mode, low-pressure oil is output through a low-pressure pump, pressure is increased by multiple times to be supplied to a hydraulic clamp, low-pressure oil is output through the pump, high-pressure oil is obtained after multiplied pressurization, and the high-pressure oil supply requirement of the hydraulic clamp is met. The low-pressure output of the pump only needs a low-power driving motor, so that the effects of energy conservation and emission reduction are achieved, and noise is reduced. According to the scheme, while the clamping precision and the response speed are guaranteed, intensive utilization of resources is achieved, and an efficient, energy-saving and economical solution is provided for a multi-machine cooperation test scene.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical testing, and specifically to a multi-drive high-pressure servo oil source. Background Art

[0002] A high-pressure servo oil source is a device that provides a high-pressure and stable power source for a hydraulic system, and is widely used in the hydraulic clamping systems of electro-hydraulic servo testing machines or electronic universal testing machines, mainly for providing the required flow rate and pressure for actuators such as hydraulic clamps.

[0003] The existing patent (Publication No.: CN116146573A) discloses that "this application relates to a multi-functional hydraulic oil source system for hydraulic testing, belonging to the technical field of hydraulic testing, including an oil tank, a test actuator, a main oil circuit, and a main return oil circuit. The main oil circuit and the main return oil circuit are respectively used to realize the connection between the oil tank and the test actuator. On the main oil circuit, a filter section, a temperature control section, and an oil supply section are sequentially arranged from the direction close to the oil tank towards the direction close to the test actuator. A control oil section is connected in parallel on the oil supply section, and a pressure regulating valve is arranged on the control oil section. A circulation oil circuit is arranged between the oil supply section and the temperature control section. One end of the circulation oil circuit is connected to the main oil circuit, and the other end of the circulation oil circuit is located in the oil tank. The filter section includes a primary filter, a secondary filter, and an oil supply pump. On the oil supply section, a main oil pump, a first reversing valve, and a second reversing valve are sequentially arranged from the direction close to the temperature control section towards the direction close to the test actuator. The pressure regulating valve is connected in parallel with the first reversing valve. This application has the effect of reducing the hardware cost and energy consumption cost."

[0004] During the implementation of this application, the inventor found that currently, the hydraulic clamps of testing machines usually rely on independent hydraulic systems to achieve the clamping function. Each testing machine host needs to be equipped with a dedicated hydraulic oil source, including components such as a motor, an oil pump, a valve block, and an oil tank, to provide hydraulic power for the clamp, so as to drive the clamping and loosening actions of the hydraulic clamp and ensure the stability of the clamping force. Such systems are widely used in scenarios such as material mechanics testing and component fatigue testing. Their independent design stems from the need for precise matching of the high-pressure oil supply to the load characteristics of the host. However, this mode results in the need to configure multiple sets of independent hydraulic systems in the scenario of multiple hosts, with a high equipment redundancy. Moreover, at high pressures (>45 MPa), corresponding high-pressure components (such as piston pumps, valves) and high-power drive motors are required, with a significant cost, further increasing the overall investment.

[0005] The main drawbacks of the prior art are low economy and resource utilization rate. Each set of test machine mainframe requires an independent oil source configuration, resulting in a several-fold increase in equipment purchase costs. Especially for the direct output of high-pressure pumps, special pressure-resistant components are needed for high-pressure systems (>45 MPa), and the procurement costs are even higher. The direct output of high-pressure pumps also requires high-power motors, causing serious waste of electrical energy. In addition, multiple hydraulic stations occupy a large space and have a high maintenance complexity. For scenarios that require parallel testing of multiple mainframes, it is difficult for traditional solutions to achieve oil source sharing, leading to a sharp increase in system redundancy and operating costs. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a one-to-many high-pressure servo oil source, which solves the problems of high overall cost and large investment when using the existing high-pressure servo oil source.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A one-to-many high-pressure servo oil source, including an oil tank pump unit, a main valve group, a stacking valve group, a first mainframe and a second mainframe. The oil tank pump unit is mainly used to provide basic power for the overall operation of the oil source. The main valve group is mainly used to adjust the pressure and flow rate of the overall oil source. The stacking valve group is mainly used to connect multiple sets of mainframes to achieve the one-to-many function. The first mainframe and the second mainframe are mainly used to realize the clamping function of the fixture.

[0008] Preferably, the oil tank pump unit includes an oil tank, a servo motor, an oil suction filter and an oil pump.

[0009] Preferably, the oil tank is used to store the hydraulic oil used in the oil source. The servo motor is used to drive the oil pump to operate and provide power for the oil source.

[0010] Preferably, the oil suction filter is used to filter out some impurities in the hydraulic oil, and the oil pump is used to extract the hydraulic oil.

[0011] Preferably, the main valve group includes an overflow valve, a throttle valve, a high-pressure filter, a three-position four-way solenoid valve, a pressure gauge, a booster and a two-position four-way solenoid valve.

[0012] Preferably, the overflow valve is used to adjust and control the required pressure value. The throttle valve is used to release excessive supplementary flow. The high-pressure filter is used to filter out impurities in the hydraulic oil. The three-position four-way solenoid valve is used to control the flow direction of the hydraulic pressure.

[0013] Preferably, the pressure gauge is used to observe the pressure value of the oil source. The booster is used to multiply and boost the low-pressure. The two-position four-way solenoid valve is used to control the booster to boost or release pressure.

[0014] Preferably, both the first host and the second host include a fixture valve group and a hydraulic fixture. The fixture valve group includes a high-pressure one-way valve, a pressure sensor, a high-precision flow divider valve, and a high-pressure hydraulically controlled one-way valve.

[0015] Preferably, the high-pressure one-way valve is used to ensure that the hydraulic oil can only flow unidirectionally, and the pressure sensor is used to collect the pressure of the hydraulic oil.

[0016] Preferably, the high-precision flow divider valve is used to control the same flow rate of the two A-1 holes, and finally achieve the same piston movement speed on both sides of the hydraulic fixture 402. The high-pressure hydraulically controlled one-way valve is used for pressure holding and can flow reversely after being controlled. The hydraulic fixture is used to achieve the clamping function.

[0017] Working principle: The multi-host high-pressure servo oil source provides a power source through the oil tank pump group. The main valve group controls the pressure and flow rate. The stacking valve group enables multiple hosts to share. The fixture valve group completes the clamping and loosening operations of the hydraulic fixture. The entire system works in coordination to provide a high-pressure oil source and precise control for the first host and the second host. The oil tank stores the hydraulic oil. The suction filter filters the impurities in the oil. The servo motor drives the oil pump to extract the hydraulic oil from the oil tank. After passing through the suction filter, the clean hydraulic oil is delivered to the main valve group. The hydraulic oil enters the main valve group and is first filtered again through the high-pressure filter to ensure the cleanliness of the oil. The relief valve adjusts the system pressure and maintains it at the set value, and the pressure is monitored in real time through the pressure gauge. The throttle valve controls the flow rate. When the hydraulic fixture enters the pressure-holding state, the excess flow is released to ensure the stability of the system. The three-position four-way solenoid valve controls the flow direction of the hydraulic oil so that it enters the fixture valve group. When boosting is required, the two-position four-way solenoid valve controls the booster to work, multiplying the low-pressure oil to form high-pressure oil. The fixture valve group receives the hydraulic oil delivered by the main valve group. Through the high-pressure hydraulically controlled one-way valve and the high-precision flow divider valve, it ensures the unidirectional flow of the hydraulic oil and controls the flow rate to achieve the clamping of the hydraulic fixture. The high-pressure one-way valve ensures that the hydraulic oil can only flow unidirectionally during clamping, playing a role in pressure holding. The pressure sensor monitors the pressure of the hydraulic oil in real time and feeds it back to the control system. When loosening is required, the two-position four-way solenoid valve controls the booster to stop working, and the hydraulic oil flows reversely, and the hydraulic fixture loosens. The two main valve groups are connected through the stacking valve group to realize the sharing of the oil source by the first host and the second host. Each main valve group independently controls one host without interference, ensuring that the hydraulic fixtures of the two hosts can work simultaneously. If more hosts are needed, the stacking valve group can be continued to be added to expand the system function.

[0018] The present invention provides a multi-host high-pressure servo oil source. It has the following beneficial effects:

[0019] 1. The present invention provides a multi-host high-pressure servo oil source. Compared with the existing high-pressure servo oil sources, through the "multi-host" design, the equipment cost and energy consumption in the multi-host scenario are significantly reduced. The single set of oil source integrates a stacking valve group, and each module is independently controlled without interference, and can synchronously provide high-pressure oil over 45 MPa for multiple sets of hosts, reducing the number of pump sets, valve blocks and drive motors, saving the hardware purchase and maintenance costs, and saving floor space. At the same time, this oil source has a pressurization design, using a low-pressure pump to match a low-power motor. The single set of oil source can reduce the energy consumption by more than 75%, and at the same time avoid using high-cost high-pressure pump sets and valve groups. Moreover, this design simplifies spare parts management, is applicable to the multi-machine collaborative test scenario, and has the advantages of high efficiency, energy saving and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic hydraulic principle diagram of the present invention;

[0021] Figure 2 is an enlarged schematic diagram of the fixture valve group of the present invention.

[0022] Among them, 1. Tank pump group; 2. Main valve group; 3. Stacking valve group; 4. First host; 5. Second host; 101. Tank; 102. Servo motor; 103. Suction filter; 104. Oil pump; 201. Relief valve; 202. Throttle valve; 203. High-pressure filter; 204. Three-position four-way solenoid valve; 205. Pressure gauge; 206. Booster; 207. Two-position four-way solenoid valve; 401. Fixture valve group; 402. Hydraulic fixture; 40101. High-pressure check valve; 40102. Pressure sensor; 40103. High-precision flow dividing valve; 40104. High-pressure hydraulic control check valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Such as Figure 1-2As shown in the figure, an embodiment of the present invention provides a multi-drop high-voltage servo oil source, which includes an oil tank pump unit 1, a main valve unit 2, a stacking valve unit 3, a first main machine 4, and a second main machine 5. The oil tank pump unit 1 is mainly used to provide basic power for the overall operation of the oil source. The main valve unit 2 is mainly used to regulate the pressure and flow rate of the overall oil source. The stacking valve unit 3 is mainly used to connect multiple sets of main machines to achieve the multi-drop function. The first main machine 4 and the second main machine 5 are mainly used to achieve the clamping function of the fixture. The oil tank pump unit 1 includes an oil tank 101, a servo motor 102, an oil suction filter 103, and an oil pump 104. The oil tank 101 is used to store the hydraulic oil used by the oil source. The servo motor 102 is used to drive the oil pump 104 to operate and provide power for the oil source. The oil suction filter 103 is used to filter out some impurities in the hydraulic oil. The oil pump 104 is used to transport and pressurize the hydraulic oil, converting electrical energy into hydraulic energy.

[0025] Specifically, the oil tank pump unit 1 includes an oil tank 101, a servo motor 102, an oil suction filter 103, and an oil pump 104. The oil tank 101 contains the hydraulic oil. The servo motor 102 drives the oil pump 104, and the oil pump 104 transports the hydraulic oil. The hydraulic oil passes through the oil suction filter 103, and the oil suction filter 103 filters out some impurities in the hydraulic oil.

[0026] The main valve unit 2 includes a relief valve 201, a throttle valve 202, a high-pressure filter 203, a three-position four-way solenoid valve 204, a pressure gauge 205, a booster 206, and a two-position four-way solenoid valve 207. The relief valve 201 is used to regulate and control the required pressure value. The throttle valve 202 is used to release excessive supplementary flow rate. The high-pressure filter 203 is used to filter out impurities in the hydraulic oil. The three-position four-way solenoid valve 204 is used to control the flow direction of the hydraulic pressure. The pressure gauge 205 is used to observe the pressure value of the oil source. The booster 206 is used to multiply the low-pressure pressure. The two-position four-way solenoid valve 207 is used to control the booster 206 to perform pressurization.

[0027] Specifically, the oil pump 104 delivers hydraulic oil to the main valve group 2. The main valve group 2 includes an overflow valve 201, a throttle valve 202, a high-pressure filter 203, a three-position four-way solenoid valve 204, a pressure gauge 205, a booster 206, and a two-position four-way solenoid valve 207. The hydraulic oil enters the main valve group 2, and impurities are filtered out by the high-pressure filter 203 to prevent impurities from clogging hydraulic components. After entering the main valve group 2, a low-pressure is formed. The overflow valve 201 adjusts and controls the required pressure value, and the pressure value can be observed through the pressure gauge 205. The main function of the throttle valve 202 is that when the hydraulic fixture 402 enters the pressure-holding state, there will be a certain leakage in the entire hydraulic system. The servo motor 102 needs to drive the oil pump 104 to supplement the flow at any time. When the servo motor 102 drives at the lowest speed, it is still possible to supplement too much flow. At this time, the throttle valve 202 releases the excessive supplemented flow to finally obtain the appropriate flow. The three-position four-way solenoid valve 204 controls the flow direction of the hydraulic oil, enters the fixture valve group 401, and controls the clamping and loosening of the hydraulic fixture 402. At this time, the hydraulic pressure entering the hydraulic fixture 402 is low pressure. After the hydraulic fixture 402 is in the clamping state, the booster 206 is controlled to open by the two-position four-way solenoid valve 207, and the low pressure is multiplied (such as 5 times). The pressurized hydraulic medium enters the fixture valve group 401 through another pipeline.

[0028] Both the first main machine 4 and the second main machine 5 include a fixture valve group 401 and a hydraulic fixture 402. The fixture valve group 401 includes a high-pressure check valve 40101, a pressure sensor 40102, a high-precision flow divider valve 40103, and a high-pressure hydraulic control check valve 40104. The high-pressure check valve 40101 is used to ensure that the hydraulic oil can only flow unidirectionally. The pressure sensor 40102 is used to collect the pressure of the hydraulic oil. The high-precision flow divider valve 40103 is used to control the flow of the two A-1 holes to be consistent. The high-pressure hydraulic control check valve 40104 is used for pressure holding and can flow reversely after being controlled. The hydraulic fixture 402 is used to achieve the clamping function.

[0029] Specifically, the fixture valve group 401 includes a high-pressure one-way valve 40101, a pressure sensor 40102, a high-precision flow dividing valve 40103, and a high-pressure hydraulically controlled one-way valve 40104. For the high-pressure one-way valve 40101, the hydraulic oil can only flow unidirectionally and cannot flow in the reverse direction, which can achieve the pressure maintaining effect and can withstand the high pressure after pressurization. The pressure sensor 40102 collects the pressure of the hydraulic oil and feeds it back to the computer. The high-precision flow dividing valve 40103 precisely controls the flow rates of the two A-1 holes to be consistent, that is, controls the symmetric clamping speeds at both ends of the hydraulic fixture 402 to be the same. The high-pressure hydraulically controlled one-way valve 40104 has the pressure maintaining function of a one-way valve and can flow in the reverse direction after being controlled. When the hydraulic fixture 402 needs to be loosened, reverse flow is required. When the hydraulic fixture 402 needs to be clamped, the three-position four-way solenoid valve 204 controls the low-pressure oil to enter from the B hole of the fixture valve group 401, passes through the high-pressure hydraulically controlled one-way valve 40104, and enters the rodless cavity of the hydraulic cylinder of the hydraulic fixture 402 from the two HB1s. The hydraulic oil in the rod chamber of the hydraulic cylinder of the hydraulic fixture 402 flows back from the two A-1s of the fixture valve group 401, passes through the high-precision flow dividing valve 40103. The high-precision flow dividing valve 40103 can precisely control the flow rates of the two A-1 holes to be consistent, that is, controls the symmetric clamping speeds at both ends of the hydraulic fixture 402 to be the same. Finally, the hydraulic oil flows back to the fuel tank 101 through the A hole. After the hydraulic fixture 402 is clamped and high-pressure oil needs to continue to enter the hydraulic fixture 402, the two-position four-way solenoid valve 207 controls the booster 206 to boost the pressure to form high-pressure oil. The high-pressure oil enters from the HP hole of the fixture valve group 401, passes through the high-pressure one-way valve 40101, and enters the rodless cavity of the hydraulic cylinder of the hydraulic fixture 402 from the two HB1s. At this time, the hydraulic fixture 402 can form a greater clamping force through the high-pressure oil.

[0030] Meanwhile, in the multi-host scenario, configure the second host 5 (more hosts are available). At this time, only the stacking valve group 3 needs to be added to achieve the same hydraulic control effect as that of the first host 4.

[0031] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-drop high-voltage servo oil source, comprising an oil tank pump unit (1), a main valve unit (2), a stacking valve unit (3), a first main machine (4) and a second main machine (5), characterized in that: The fuel tank pump unit (1) is mainly used to provide basic power for the overall operation of the oil source. The main valve group (2) is mainly used to regulate the pressure and flow rate of the overall oil source. The stacked valve group (3) is mainly used to connect multiple sets of main machines to achieve the function of one-drive-multi. The first main machine (4) and the second main machine (5) are mainly used to achieve the clamping function of the fixture.

2. The multi-drive high-voltage servo oil source according to claim 1, characterized in that: The fuel tank pump unit (1) includes a fuel tank (101), a servo motor (102), an oil suction filter (103), and an oil pump (104).

3. The multi-drive high-voltage servo oil source according to claim 2, wherein: The fuel tank (101) is used to store the hydraulic oil used by the oil source. The servo motor (102) is used to drive the oil pump (104) to operate and provide power for the oil source.

4. A multi-drive high-voltage servo oil source according to claim 2, characterized in that: The oil suction filter (103) is used to filter out some impurities in the hydraulic oil. The oil pump (104) is used to transport and pressurize the hydraulic oil, converting electrical energy into hydraulic energy.

5. The multi-drive high-voltage servo oil source according to claim 1, characterized in that: The main valve group (2) includes a relief valve (201), a throttle valve (202), a high-pressure filter (203), a three-position four-way solenoid valve (204), a pressure gauge (205), a booster (206), and a two-position four-way solenoid valve (207).

6. The multi-drive high-voltage servo oil source according to claim 6, characterized in that: The relief valve (201) is used to adjust and control the required pressure value. The throttle valve (202) is used to release the excessive supplementary flow rate. The high-pressure filter (203) is used to filter out impurities in the hydraulic oil. The three-position four-way solenoid valve (204) is used to control the flow direction of the hydraulic pressure.

7. The multi-drive high-voltage servo oil source according to claim 6, wherein: The pressure gauge (205) is used to observe the pressure value of the oil source. The booster (206) is used to multiply the low-pressure by a certain multiple. The two-position four-way solenoid valve (207) is used to control the booster (206) to boost or relieve pressure.

8. The multi-drive high-voltage servo oil source according to claim 1, wherein: Both the first main machine (4) and the second main machine (5) include a fixture valve group (401) and a hydraulic fixture (402). The fixture valve group (401) includes a high-pressure check valve (40101), a pressure sensor (40102), a high-precision flow dividing valve (40103), and a high-pressure hydraulically controlled check valve (40104).

9. A multi-drive high-voltage servo oil source according to claim 8, characterized in that: The high-pressure check valve (40101) is used to ensure that the hydraulic oil can only flow unidirectionally. The pressure sensor (40102) is used to collect the pressure of the hydraulic oil.

10. A multi-drive high-voltage servo oil source according to claim 8, characterized in that: The high-precision flow dividing valve (40103) is used to control the flow rates of two A-1 holes to be consistent, ultimately achieving the same moving speed of the pistons on both sides of the hydraulic fixture 402. The high-pressure hydraulically controlled check valve (40104) is used to maintain pressure and can reverse flow when controlled. The hydraulic fixture (402) is used to achieve the sample clamping function.

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