Multifunctional hydraulic oil source system for hydraulic test

Abstract

The application relates to a multifunctional hydraulic oil source system for hydraulic tests, belonging to the technical field of hydraulic tests, which comprises an oil tank, test execution elements, a main oil path and a main oil return path, the main oil path and the main oil return path are used for realizing the communication between the oil tank and the test execution elements, an oil filtering section, a temperature control section and an oil supply section are sequentially arranged on the main oil path from the direction close to the oil tank to the direction close to the test execution elements, a control oil section is connected in parallel on the oil supply section, a pressure regulating valve is arranged on the control oil section, a circulating oil path is arranged between the oil supply section and the temperature control section, one end of the circulating oil path is communicated with the main oil path, the other end of the circulating oil path is located in the oil tank, the oil filtering section comprises a primary oil filter, a secondary oil filter and an oil supply pump, a main oil pump, a reversing valve one and a reversing valve two are sequentially arranged on the oil supply section from the direction close to the temperature control section to the test execution elements, the pressure regulating valve is connected in parallel with the reversing valve one, and the application has the effects of reducing the hardware cost and the energy consumption cost.

Description

Technical Field

[0001] This application relates to the field of hydraulic testing, and in particular to a multifunctional hydraulic oil source system for hydraulic testing. Background Technology

[0002] Currently, hydraulic testing systems generally require four types of oil sources: main oil source, circulating oil source, control oil source, and supply oil source. The main oil source primarily provides pressurized oil to the test actuators within the hydraulic testing system; the circulating oil source circulates and filters the oil in the tank to ensure oil cleanliness and temperature control; the control oil source provides external control oil to the test actuators and control oil to the hydraulic testing system; and the supply oil source ensures that the pressurized oil provided by the main oil source meets the test standards of the test actuators. These four oil sources are often assigned to separate motor pump sets to prevent interference between them during system operation.

[0003] However, equipping each of the four oil sources with a separate motor pump unit would not only result in too many motor pump units being required, but would also increase the total power of the entire hydraulic test system, which would lead to higher hardware and energy costs for the entire hydraulic test system. Summary of the Invention

[0004] To save on hardware and energy costs of hydraulic testing systems, this application provides a multifunctional hydraulic oil source system for hydraulic testing.

[0005] The multifunctional hydraulic oil source system for hydraulic testing provided in this application adopts the following technical solution:

[0006] It includes 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 used to connect the oil tank and the test actuator. The main oil circuit has an oil filter section, a temperature control section, and an oil supply section in sequence from the direction closest to the oil tank toward the actuator. A control oil section is connected in parallel to the oil supply section. The control oil section is equipped with a pressure regulating valve. A circulation oil circuit is provided 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 oil filter section includes a primary oil filter, a secondary oil filter, and an oil supply pump. The oil supply section has a main oil pump, a reversing valve one, and a reversing valve two in sequence from the direction closest to the test actuator from the temperature control section. The pressure regulating valve is connected in parallel with the reversing valve one.

[0007] By adopting the above technical solution, the oil in the tank is drawn out by the oil supply pump and flows to the main oil pump after being filtered and temperature controlled on the main oil line. The output flow rate at the oil supply pump is greater than the required flow rate at the main oil pump. The excess oil flows back to the tank through the circulation oil line. As the oil supply pump continues to operate, the oil continuously circulates in the tank and is continuously filtered by the oil filter during the circulation process. When the main oil pump delivers the required flow rate of oil to the test actuator, the delivered oil flows into the test actuator through reversing valve one and reversing valve two for testing, and finally flows back to the tank from the main return oil line. Reversing valve one is used to determine the adjustment... Whether the pressure valve can function, the directional valve two is used to change the flow direction of the oil in the test actuator; the pressure regulating valve on the control oil section is used to regulate the oil pressure at the control oil section, or to discharge excess oil in the original oil circuit, so as to ensure the stability of the oil pressure in the entire hydraulic oil source system. During the entire test, only two pump sources are needed in this oil source system to provide test oil to the test actuator, supply oil to the main oil pump, stabilize the oil pressure in the control oil circuit, improve oil cleanliness, and increase oil temperature, without having to provide multiple pump sources, thereby improving the pump group utilization rate, reducing system power loss, and reducing hardware and energy costs.

[0008] Optionally, a check valve is installed in the circulating oil circuit, which allows the oil in the circulating oil circuit to move only towards the oil tank.

[0009] By adopting the above technical solution, the one-way valve in the circulating oil circuit allows oil exceeding the flow rate required by the main oil pump to flow in only one direction within the circulating oil circuit. At the same time, the pressure generated when oil rushes into the one-way valve and causes it to open also enables the one-way valve to function as a low-pressure relief valve.

[0010] Optionally, the temperature control section includes a heater and a cooler, both of which are connected in series in the main oil circuit.

[0011] By adopting the above technical solution, during the process of the oil pump drawing oil from the oil tank and sending it to the main oil pump, the oil passes through the heater and cooler, so that the oil can be kept within a suitable operating temperature range, thereby ensuring the normal flow of the oil.

[0012] Optionally, a check valve and a high-pressure oil filter are also provided between the reversing valve and the main oil pump.

[0013] By adopting the above technical solution, a check valve and a high-pressure oil filter are installed between the reversing valve one and the main oil pump. When the main oil pump delivers oil to the test actuator, the check valve two prevents the oil from flowing back to the main oil pump, while the high-pressure oil filter filters the oil output by the main oil pump, removing impurities from the oil and preventing impurities from clogging the valve ports of the check valve one and the check valve two.

[0014] Optionally, the control oil section includes branch oil circuit one and branch oil circuit two. One end of branch oil circuit one is connected to the main oil circuit between reversing valve one and reversing valve two. The pressure regulating valve is installed on branch oil circuit one. One end of branch oil circuit two is connected to the main oil pump position near branch oil circuit one. The other end of branch oil circuit two is used to connect to the outside.

[0015] By adopting the above technical solution, when the reversing valve is in the open state, the oil supply section in the main oil circuit is disconnected, and the oil in the main oil circuit flows to the branch pipe. Since the pressure regulating valve needs to reach the corresponding pressure value to open at this time, the minimum pressure at the outlet of the main oil pump is the set pressure at the pressure regulating valve.

[0016] Optionally, a branch oil circuit three is provided in the main oil circuit between the first and second directional valves. The branch oil circuit three is connected to the control oil section in the main return oil circuit, and a safety valve is provided on the branch oil circuit three.

[0017] By adopting the above technical solution, the safety valve on the third branch oil circuit is used to ensure that the oil pressure in the main oil circuit does not exceed the maximum working pressure, thereby playing a role in safety protection for the main oil circuit and the main return oil circuit.

[0018] Optionally, a pressure reducing valve is also provided on branch oil circuit two.

[0019] By adopting the above technical solution, when the oil flows to the control port on the second branch oil circuit, the oil pressure of the oil flowing out of the control port can be reduced by the pressure reducing valve.

[0020] Optionally, the oil supply pump is sandwiched between the primary oil filter and the secondary oil filter.

[0021] By adopting the above technical solution, the primary oil filter performs preliminary filtration of the oil in the oil tank, and the oil supply pump is sandwiched between the primary oil filter and the secondary oil filter so that the oil delivered by the main oil pump will be filtered by the secondary oil filter, thereby ensuring the cleanliness of the oil when it is delivered to the main oil pump.

[0022] Optionally, a branch oil circuit four is provided between the main oil circuit and the main return oil circuit. One end of the branch oil circuit four is connected to the main oil circuit between the reversing valve one and the reversing valve two, and the other end of the branch oil circuit four is connected to the main return oil circuit. An overflow valve is provided on the branch oil circuit four.

[0023] By adopting the above technical solution, when the oil pressure at the second reversing valve is too high, the overflow valve on the fourth branch oil circuit will open, so that the oil at the second reversing valve flows to the main return oil circuit through the fourth branch oil circuit. The overflow valve plays the role of regulating the oil pressure at the second reversing valve.

[0024] In summary, this application includes at least the following beneficial technical effects:

[0025] 1. By installing a main oil pump on the main oil circuit, and installing an oil supply pump, a primary oil filter, and a secondary oil filter in the oil filter section, installing directional valve one and directional valve two on the main oil circuit, and also connecting a control oil section in parallel on the main oil circuit with a pressure regulating valve, the entire hydraulic system only needs two pump sets, the oil supply pump and the main oil pump, to clean, circulate, control the oil pressure, and supply oil in the main oil circuit and the main return oil circuit. This achieves the effects of improving pump set utilization, reducing system power loss, and reducing economic costs.

[0026] 2. By placing the oil supply pump between the primary oil filter and the secondary oil filter, the oil that passes through the oil supply pump after the primary oil filter performs initial filtration will also be filtered by the secondary oil filter. This prevents impurities in the oil supply pump from being carried to the main oil pump, thereby ensuring the cleanliness of the oil. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the oil circuit of a multifunctional hydraulic oil source system for hydraulic testing according to this application;

[0028] Figure 2 yes Figure 1 Schematic diagram of the flow direction of the intermediate oil in the main oil circuit and the main return oil circuit;

[0029] Explanation of reference numerals in the attached diagram: 1. Oil tank; 2. Test actuator; 3. Main oil circuit; 4. Main return oil circuit; 5. Oil filter section; 6. Temperature control section; 7. Oil supply section; 8. Control oil section; 9. Primary oil filter; 10. Secondary oil filter; 11. Oil supply pump; 12. Main oil pump; 13. Directional valve one; 14. Directional valve two; 15. Check valve one; 16. Heater; 17. Cooler; 18. Check valve two; 19. High-pressure oil filter; 20. Branch oil circuit one; 21. Branch oil circuit two; 22. Pressure regulating valve; 23. Control port; 24. Branch oil circuit three; 25. Safety valve; 26. Pressure reducing valve; 27. Branch oil circuit four; 28. Relief valve; 29. ​​Circulation oil circuit; Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0031] This application discloses a multifunctional hydraulic oil source system for hydraulic testing, referring to... Figure 1-2 The system includes an oil tank 1, a test actuator 2, a main oil circuit 3, and a main return oil circuit 4. One end of the main oil circuit 3 and one end of the main return oil circuit 4 are placed inside the oil tank 1, and one end of the main oil circuit 3 and the main return oil circuit 4 are connected to the test actuator 2. The oil in the oil tank 1 flows from the main oil circuit 3 into the test actuator 2, and from the test actuator 2 into the main return oil circuit 4, and finally back into the oil tank 1.

[0032] Reference Figure 1 On the main oil circuit 3, from the oil tank 1 towards the test actuator 2, there are oil filter sections 5, temperature control sections 6, and oil supply sections 7 connected in series. The oil filter section 5 includes a primary oil filter 9, a secondary oil filter 10, and an oil supply pump 11. The oil supply pump 11 is located between the primary oil filter 9 and the secondary oil filter 10. The temperature control section 6 includes a heater 16 and a cooler 17. This allows the oil to pass through the primary oil filter 9, the oil supply pump 11, the secondary oil filter 10, the heater 16, and the cooler 17 in sequence when the oil supply pump 11 is working. This cleans and controls the temperature of the oil drawn from the oil tank 1 by the oil supply pump 11, so that the oil can maintain a suitable cleanliness and appropriate temperature when it flows to the oil supply section 7.

[0033] The oil supply section 7 includes a main oil pump 12, a high-pressure oil filter 19, a second check valve 18, a first directional valve 13, and a second directional valve 14. The main oil pump 12 delivers the oil supplied by the oil supply pump 11 to the test actuator 2. The oil passes through the high-pressure oil filter 19, the second check valve 18, the first directional valve 13, and the second directional valve 14 in sequence. The first directional valve 13 is a two-position two-way directional valve, while the second directional valve 14 is a three-position four-way directional valve. When the first directional valve 13 is in its initial position, the main oil circuit 3 is connected. The oil flows from the first directional valve 13 to the second directional valve 14, then from the second directional valve 14 to the test actuator 2, and finally flows out of the test actuator 2 and flows through the main return oil circuit 4 to the oil tank 1.

[0034] The control oil section 8 is connected in parallel to the main oil circuit 3. Control oil section 8 includes branch oil circuit 1 20 and branch oil circuit 21. One end of branch oil circuit 1 20 is connected to the main oil circuit 3 between directional valve 13 and directional valve 24, while the other end is connected to the main oil circuit 3 between directional valve 13 and check valve 28. A pressure regulating valve 22, which is a sequence valve, is also installed on branch oil circuit 1 20. Branch oil circuit 21 is connected to the end of branch oil circuit 1 20 near check valve 28 and is equipped with a pressure reducing valve 26. The end of 21 furthest from branch oil circuit 20 is the control port 23. The control port 23 can be used to connect branch oil circuit 21 with the outside world. When the reversing valve 13 is energized, that is, the main oil circuit 3 is disconnected at the reversing valve 13, the oil flows into branch oil circuit 20. At this time, the set pressure of the pressure regulating valve 22 on branch oil circuit 20 must always be greater than the set pressure of the pressure reducing valve 26 on branch oil circuit 21. Then the oil flows into branch oil circuit 21 and flows out from the control port 23 when the control port 23 is not blocked. At this time, the oil pressure at the control port 23 is determined by the pressure reducing valve 26.

[0035] A branch oil circuit 3 24 is also provided on the main oil circuit 3. One end of the branch oil circuit 3 24 is connected to the main oil circuit 3 between the reversing valve 13 and the check valve 2 18, while the other end of the branch oil circuit 3 24 is connected to the main return oil circuit 4. A safety valve 25 is provided on the branch oil circuit 3 24.

[0036] A branch oil circuit 4 27 is also provided on the main oil circuit 3 at the position of the reversing valve 13 and the reversing valve 2 14. The end of the branch oil circuit 4 27 away from the main oil circuit 3 is connected to the main return oil circuit 4. An overflow valve 28 is provided on the branch oil circuit 4 27. When the pressure regulating valve 22 is in the initial position, the overflow valve 28 on the branch oil circuit 4 27 regulates the pressure delivered by the main oil pump 12 to the test actuator 2.

[0037] In order to recover the oil at the main oil pump 12 and avoid excessive oil pressure at the main oil pump 12, a circulation oil circuit 29 is also provided on the main oil circuit 3 between the main oil pump 12 and the temperature control section 6. A one-way valve 15 is provided on the circulation oil circuit 29. This allows the excess oil to flow back to the oil tank 1 through the one-way valve 15 on the circulation oil circuit 29 when the oil flow rate supplied by the oil supply pump 11 to the main oil pump 12 is greater than the required flow rate of the main oil pump 12, thereby realizing the circulation of oil.

[0038] The implementation principle of this application embodiment is as follows:

[0039] When oil circulation is required, the main oil pump 12 is turned off and the oil supply pump 11 is started. The oil is drawn out from the oil tank 1 and passes through the primary oil filter 9, the oil supply pump 11, the secondary oil filter 10, the heater 16, and the cooler 17 in sequence. Since the main oil pump 12 is turned off, the oil will flow to the circulation oil circuit 29 and flow back into the oil tank 1 after passing through the one-way valve 15.

[0040] When controlling the pressure of the oil output from the control port, the oil supply pump 11 and the main oil pump 12 are started in sequence, energizing the reversing valve 13. The oil is drawn from the oil tank 1 and passes through the primary oil filter 9, the oil supply pump 11, the secondary oil filter 10, the heater 16, the cooler 17, the main oil pump 12, the high-pressure oil filter 19, and the check valve 18 in sequence. Since the reversing valve 15 is energized, it is in the open state. At this time, the oil output pressure on the main oil pump 12 is determined by the pressure regulating valve 22 on the branch oil circuit 20. Since the pressure of the pressure regulating valve 22 on the branch oil circuit 20 is greater than the pressure of the pressure reducing valve 26 on the branch oil circuit 21, the oil flows from the main oil circuit 3 into the branch oil circuit 20 and then into the branch oil circuit 21. After passing through the pressure reducing valve 26, it flows out from the control port 23 on the branch oil circuit 21. The oil pressure at the control port 23 on the branch oil circuit 21 is determined by the pressure reducing valve 26.

[0041] When oil needs to be supplied to the test actuator 2, the oil supply pump 11 and the main oil pump 12 are started in sequence, so that the reversing valve 13 is in the initial state (i.e., the reversing valve 13 is not energized) and the control port 23 on the branch oil circuit 21 is blocked. The oil flows from the oil tank 1 through the primary oil filter 9, the oil supply pump 11, the secondary oil filter 10, the heater 16, the cooler 17, the main oil pump 12, the high pressure oil filter 19, the check valve 2 18, the reversing valve 13, and the reversing valve 2 14 into the test actuator 2, and flows out from the test actuator 2. After passing through the main return oil circuit 4, it flows back to the oil tank 1.

[0042] When it is necessary to control the pressure at control port 23 while supplying oil, the oil supply pump 11 and the main oil pump 12 are started sequentially, energizing the reversing valve 13 and blocking the control port 23 on the branch oil circuit 21. The oil flows from the oil tank 1 through the primary oil filter 9, oil supply pump 11, secondary oil filter 10, heater 16, cooler 17, main oil pump 12, high-pressure oil filter 19, check valve 18, pressure regulating valve 22, and reversing valve 14 into the test actuator 2. At this time, the set pressure on the pressure regulating valve 22 is higher than the set pressure on the pressure reducing valve 26. The pressure at port A / B of the directional valve 14 is determined by the overflow valve 28 on branch oil circuit 27 or the test actuator 2. When the pressure at port A / B of the directional valve 14 is lower than the pressure on the pressure regulating valve 22, the oil output pressure of the main oil pump 12 is consistent with the pressure on the pressure regulating valve 22. When the pressure at port A / B is higher than the pressure on the pressure regulating valve 22, the oil output pressure of the main oil pump 12 is consistent with the pressure at port A / B of the directional valve 14, while the output pressure of the pressure reducing valve 26 is not affected by the pressure at port A / B.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multifunctional hydraulic oil source system for hydraulic testing, characterized in that... The system includes an oil tank (1), a test actuator (2), a main oil circuit (3), and a main return oil circuit (4). The main oil circuit (3) and the main return oil circuit (4) are used to connect the oil tank (1) and the test actuator (2). The main oil circuit (3) is divided into an oil filtration section (5), a temperature control section (6), and an oil supply section (7) from the direction closest to the oil tank (1) toward the direction closest to the test actuator (2). A control oil section (8) is connected in parallel to the oil supply section (7). A pressure regulating valve (22) is provided on the control oil section (8). 7) A circulating oil circuit (29) is provided between the temperature control section (6) and the main oil circuit (3). The other end of the circulating oil circuit (29) is located in the oil tank (1). The oil filter section (5) is provided with a primary oil filter (9), a secondary oil filter (10) and an oil supply pump (11). The oil supply section (7) is provided with a main oil pump (12), a reversing valve one (13) and a reversing valve two (14) in sequence from the temperature control section (6) toward the test execution element (2). The pressure regulating valve (22) is connected in parallel with the reversing valve one (13).

2. The multifunctional hydraulic oil source system for hydraulic testing according to claim 1, characterized in that: A one-way valve (15) is installed on the circulating oil circuit (29), which allows the oil in the circulating oil circuit (29) to move only toward the oil tank (1).

3. The multifunctional hydraulic oil source system for hydraulic testing according to claim 1, characterized in that: The temperature control section (6) is equipped with a heater (16) and a cooler (17), both of which are connected in series in the main oil circuit (3).

4. The multifunctional hydraulic oil source system for hydraulic testing according to claim 1, characterized in that: A check valve (18) and a high-pressure oil filter (19) are also provided between the reversing valve (13) and the main oil pump (12).

5. The multifunctional hydraulic oil source system for hydraulic testing according to claim 1, characterized in that: The control oil section (8) includes a branch oil circuit one (20) and a branch oil circuit two (21). One end of the branch oil circuit one (20) is connected to the main oil circuit (3) between the reversing valve one (13) and the reversing valve two (14). The other end of the branch oil circuit one (20) is connected to the main oil circuit (3) between the main oil pump (12) and the reversing valve one (13). The pressure regulating valve (22) is located on the branch oil circuit one (20). One end of the branch oil circuit two (21) is connected to the branch oil circuit one (20) near the main oil pump (12). The other end of the branch oil circuit two (21) is provided with a control port (23), which is used to communicate with the outside.

6. The multifunctional hydraulic oil source system for hydraulic testing according to claim 4, characterized in that: The main oil circuit (3) is further provided with a branch oil circuit three (24) between the reversing valve one (13) and the check valve two (18). The branch oil circuit three (24) is connected to the main return oil circuit (4), and a safety valve (25) is provided on the branch oil circuit three (24).

7. A multifunctional hydraulic oil source system for hydraulic testing according to claim 5, characterized in that: A pressure reducing valve (26) is provided on the second branch oil circuit (21).

8. A multifunctional hydraulic oil source system for hydraulic testing according to claim 1, characterized in that: The oil supply pump (11) is located between the primary oil filter (9) and the secondary oil filter (10).

9. A multifunctional hydraulic oil source system for hydraulic testing according to claim 5, characterized in that: A branch oil passage four (27) is provided between the main oil passage (3) and the main return oil passage (4). One end of the branch oil passage four (27) is connected to the main oil passage (3) between the first reversing valve (13) and the second reversing valve (14), and the other end of the branch oil passage four (27) is connected to the main return oil passage (4). An overflow valve (28) is provided on the branch oil passage four (27).

Images