Performance test system for ultra-high pressure hydraulic pump

Abstract

The application provides a performance test system for an ultrahigh-pressure hydraulic pump, a first test device adopts a loading valve group, a reserved valve group and an intelligent press, so that the ultrahigh-pressure hydraulic pump can be tested under various loads, the test result is more in line with actual working conditions, a press rodless cavity control valve group and an auxiliary control valve group are adopted to realize control and rapid retraction of the intelligent press, the auxiliary control valve group is used as a control system of an ultrahigh-pressure element, and the reliability and service life of the test system are increased. A second test device adopts an ultrahigh-pressure test oil circuit and a large-flow test oil circuit, so that the test system tests the ultrahigh-pressure pump and the large-flow pump, oil temperature sensors and oil pressure sensors are arranged in an oil observation circuit, an oil supplement circuit, a system oil circuit and an oil return circuit to comprehensively detect oil characteristics during operation of the test system, and an oil discharge circuit is arranged, so that the test system is quickly unloaded when a problem occurs during operation, and the safety of the system is enhanced.

Description

Technical Field

[0001] This invention relates to the field of hydraulic component testing, and in particular to a performance testing system for ultra-high pressure hydraulic pumps. Background Technology

[0002] Hydraulic systems, with their advantages of high power-to-weight ratio, fast response, and stepless speed regulation, are widely used in aerospace, engineering machinery, and high-end mobile equipment. With the development of modern technology, hydraulic systems are gradually moving towards ultra-high pressure.

[0003] Piston pumps, with their advantages of high rated pressure, compact structure, high efficiency, and convenient flow regulation, are widely used in hydraulic systems. With the development of modern technology, piston pumps are gradually evolving towards ultra-high pressure, high flow rate, and high power density. As the core power component of ultra-high pressure hydraulic transmission systems, the performance of ultra-high pressure pumps directly affects the performance of the ultra-high pressure hydraulic system. Ultra-high pressure pump comprehensive performance testing benches are the foundation for judging the performance of researched and manufactured ultra-high pressure pumps. They can be used not only for scientific research such as various curve tests but also for research in fluid transmission and control, mechanical engineering, and automation disciplines.

[0004] However, there is currently little research on comprehensive performance testing benches for hydraulic components under ultra-high pressure conditions. Therefore, this invention proposes a performance testing system for ultra-high pressure hydraulic pumps, which fully reflects and tests the various performance characteristics of ultra-high pressure pumps. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a comprehensive performance testing system for ultra-high pressure hydraulic pumps. It enhances the safety and reliability of the testing system by employing an ultra-high pressure hydraulically controlled check valve. By utilizing a loading valve group, a reserved valve group, and an intelligent press, the ultra-high pressure pump can be tested under various loads, making the test results more consistent with actual working conditions and more reliable. The use of a rodless chamber control valve group and an auxiliary control valve group enables the intelligent press to be controlled and quickly retracted. The auxiliary control valve group also serves as the control system for ultra-high pressure components, controlling high pressure with low pressure, significantly increasing the reliability and service life of the testing system. Finally, the pressure regulating valve group allows for rapid pressure relief in emergency situations, increasing the safety of the testing system. On the other hand, by employing an ultra-high pressure reversing valve, the testing system possesses strong rapid response characteristics; by using an ultra-high pressure testing oil circuit and a high-flow testing oil circuit, the testing system can test ultra-high pressure pumps and high-flow pumps; by installing oil temperature sensors and oil pressure sensors in the oil observation circuit, oil replenishment circuit, system oil circuit, and oil return circuit, the oil characteristics during the operation of the testing system are comprehensively detected; and by using an oil unloading circuit, the testing system can be quickly unloaded when problems occur during operation, enhancing the safety of the testing system.

[0006] This invention provides a performance testing system for an ultra-high pressure hydraulic pump, comprising a first oil cooling circuit, a replenishing valve group, a pressure regulating valve group, a first return oil circuit, an auxiliary control valve group, a press rodless chamber control valve group, a loading valve group, and a reserved valve group. The auxiliary control valve group includes a first electromagnetic relief valve before the auxiliary pump unit, a first check valve before the auxiliary pump unit, a press rod chamber unloading control valve, a press rod chamber hydraulically controlled check valve, a press rod chamber relief valve, and a second electromagnetic relief valve before the auxiliary pump unit. The first and second ends of the inlet of the first electromagnetic relief valve before the auxiliary pump unit are respectively connected to the first end of the first check valve before the auxiliary pump unit and the first outlet of the double auxiliary pump unit. The inlet, outlet, first working port, and second working port of the press rod chamber unloading control valve are respectively connected to the second end of the first check valve before the auxiliary pump unit and the first outlet of the auxiliary pump unit. The outlet end of the first electromagnetic relief valve before the unit, the first end of the hydraulic control check valve of the rod chamber of the compressor, and the control end of the hydraulic control check valve of the rod chamber of the compressor are connected. The inlet end and outlet end of the hydraulic relief valve of the rod chamber of the compressor are respectively connected to the second end of the hydraulic control check valve of the rod chamber of the compressor and the outlet end of the oil unloading control valve of the rod chamber of the compressor. The inlet end of the second electromagnetic relief valve before the auxiliary pump unit is connected to the second outlet of the double auxiliary pump unit. The outlet end of the second electromagnetic relief valve before the auxiliary pump unit and the outlet end of the first electromagnetic relief valve before the auxiliary pump unit are connected to the first end of the second return oil filter in the first return oil circuit. The press rodless chamber control valve assembly includes a press rodless chamber oil unloading hydraulic control check valve, a press rodless chamber throttle valve, a press rodless chamber oil unloading control valve, and a press rodless chamber oil inlet hydraulic control check valve. The first port, second port, and third port of the first end of the press rodless chamber oil inlet hydraulic control check valve are respectively connected to the second end of the press rodless chamber oil unloading hydraulic control check valve, the first end of the press rodless chamber throttle valve, and the rodless chamber oil port of the intelligent press. The inlet end of the press rodless chamber oil unloading control valve is connected to the second end of the press rodless chamber throttle valve. The outlet end and working oil port of the press rodless chamber oil unloading control valve are respectively connected to the first port and second port of the first end of the press rodless chamber oil unloading hydraulic control check valve. The loading valve assembly includes a first hydraulically controlled check valve, a second hydraulically controlled check valve, a first relief valve, a second relief valve, and a back pressure valve. The first ends of the first and second hydraulically controlled check valves are respectively connected to the inlet ends of the first and second relief valves. The outlet ends of the first and second relief valves are respectively connected to the first and second inlet ends of the back pressure valve.The reserved valve group includes a reserved valve group ball valve, a reserved valve group unloading ball valve, a reserved valve group overflow valve, a reserved valve group upstream ball valve of the reserved valve group overflow valve, a reserved valve group directional valve, a reserved valve group first pressure sensor, a reserved valve group second pressure sensor, dual one-way throttle valves, a first quick-connect coupling, and a second quick-connect coupling. The first end of the reserved valve group ball valve is connected to the inlet end of the reserved valve group directional valve. The first and second outlet ends of the reserved valve group directional valve are respectively connected to the reserved valve group unloading ball valve and the upstream ball valve of the reserved valve group overflow valve. The first end of the ball valve is connected, and the two ends of the reserved valve group overflow valve are respectively connected to the second ends of the reserved valve group unloading ball valve and the ball valve before the reserved valve group overflow valve. The first working oil port and the second working oil port of the reserved valve group reversing valve are respectively connected to the first pressure sensor and the second pressure sensor of the reserved valve group, and then respectively connected to the first end and the second end of the double one-way throttle valve. The third end and the fourth end of the double one-way throttle valve are respectively connected to the first quick-connect fitting and the second quick-connect fitting.

[0007] Preferably, the replenishing valve assembly includes a first replenishing pump solenoid relief valve, a first suction temperature sensor, a first suction pressure sensor, a first replenishing pump front ball valve, and a self-suctioning ball valve. The first and second ends of the inlet of the first replenishing pump solenoid relief valve are respectively connected to the first end of the first replenishing pump front ball valve and the outlet end of the first replenishing pump. The second end of the first replenishing pump front ball valve is sequentially connected to the first suction temperature sensor, the first suction pressure sensor, and the second end of the self-suctioning ball valve. The outlet end of the first replenishing pump solenoid relief valve and the first end of the self-suctioning ball valve are respectively connected to the mounting end of the oil tank.

[0008] Preferably, the pressure regulating valve assembly includes a main pump overflow valve, a system pressure sensor, a main pump front check valve, and a system unloading hydraulic control check valve. The first and second ends of the inlet of the main pump overflow valve are respectively connected to the outlet end of the first pump under test and the inlet end of the main pump front check valve. The outlet end of the main pump overflow valve and the first end of the system unloading hydraulic control check valve are respectively connected to the first end of the first return oil filter in the first return oil circuit. The first and second ends of the outlet of the main pump front check valve are respectively connected to the second end of the system unloading hydraulic control check valve and the system pressure sensor.

[0009] Preferably, the first return oil circuit includes a first system unloading ball valve, a first return oil temperature sensor, a first return oil pressure sensor, a ball valve before the first return oil flow meter, a first return oil flow meter, a ball valve after the first return oil flow meter, a bypass ball valve for the first return oil flow meter, and a first return oil filter. The first end of the first system unloading ball valve is connected to the second end of the system unloading hydraulic control check valve in the pressure regulating valve group. The first, second, third, and fourth interfaces of the second end of the first system unloading ball valve are respectively connected to the first ends of the first return oil temperature sensor, the first return oil pressure sensor, the ball valve before the first return oil flow meter, and the bypass ball valve for the first return oil flow meter. The second end of the ball valve before the first return oil flow meter is connected to the first end of the first return oil flow meter. The second end of the first return oil flow meter is connected to the first end of the ball valve after the first return oil flow meter. The first and second interfaces of the second end of the ball valve after the first return oil flow meter are respectively connected to the second end of the bypass ball valve for the first return oil flow meter and the first end of the first return oil filter. The second end of the first return oil filter is connected to the mounting end of the oil tank.

[0010] Preferably, the auxiliary control valve group further includes a hydraulically controlled check valve for the compressor rodless chamber, a hydraulically controlled check valve for the loading valve group, a hydraulically controlled check valve for the system unloading valve, and a second check valve before the auxiliary pump unit. The first, second, and third ports of the second end of the second check valve before the auxiliary pump unit are respectively connected to the inlet ends of the hydraulically controlled check valve for the compressor rodless chamber, the hydraulically controlled check valve for the loading valve group, and the hydraulically controlled check valve for the system unloading valve. The first end of the second check valve before the auxiliary pump unit is connected to the second check valve before the auxiliary pump unit. The working end of the magnetic overflow valve is connected to the first and second working ports of the hydraulic control valve of the compressor rodless chamber, which are respectively connected to the control ends of the hydraulic control valve for unloading oil in the compressor rodless chamber and the hydraulic control valve for inlet oil in the compressor rodless chamber. The first and second working ports of the hydraulic control valve of the loading valve group are respectively connected to the control ends of the first and second hydraulic control valves of the loading valve group. The working port of the hydraulic control valve of the system unloading hydraulic control valve is connected to the control end of the system unloading hydraulic control valve in the pressure regulating valve group.

[0011] A second aspect of the present invention provides a performance testing system for an ultra-high pressure hydraulic pump, comprising a second oil cooling circuit, a system oil circuit, an oil unloading circuit, an oil replenishment circuit, a second return oil circuit, an oil observation circuit, an ultra-high pressure testing circuit, and a high flow rate testing circuit. The oil replenishment circuit includes a second oil replenishment pump, a second oil replenishment pump solenoid relief valve, a ball valve before the second oil replenishment pump, a self-suction check valve, a ball valve before the suction flow meter, a bypass ball valve for the suction flow meter, a throttle valve before the suction flow meter, a suction flow meter, a ball valve after the suction flow meter, a suction pressure gauge, a second suction pressure sensor, and a second suction temperature sensor. The first and second interfaces of the first end of the second oil replenishment pump are respectively connected to the inlet end of the second oil replenishment pump solenoid relief valve and the first end of the second oil replenishment pump ball valve. The second end of the second oil replenishment pump ball valve and the self-suction check valve are connected to the inlet end of the solenoid relief valve and the first end of the ball valve before the second oil replenishment pump, respectively. The outlet end of the oil check valve, the first end of the ball valve before the oil suction flow meter, and the first end of the bypass ball valve of the oil suction flow meter are connected in sequence and then connected to the first end of the throttle valve before the oil suction flow meter. The second end of the throttle valve before the oil suction flow meter is connected to the first end of the oil suction flow meter. The second end of the oil suction flow meter is connected to the first end of the ball valve after the oil suction flow meter. The second end of the ball valve after the oil suction flow meter and the second end of the bypass ball valve of the oil suction flow meter are connected in sequence and then connected to the oil suction pressure gauge, the second oil suction pressure sensor, and the second oil suction temperature sensor. The ultra-high pressure test oil circuit includes an ultra-high pressure test first ball valve, an ultra-high pressure test reversing valve, an ultra-high pressure test first relief valve, an ultra-high pressure test second relief valve, an ultra-high pressure test first pressure gauge, an ultra-high pressure test second pressure gauge, and an ultra-high pressure test second ball valve. The inlet end of the ultra-high pressure test reversing valve is connected to the second end of the ultra-high pressure test first ball valve. The first end and the second end of the first working oil port of the ultra-high pressure test reversing valve are respectively connected to the inlet end of the ultra-high pressure test first relief valve and the ultra-high pressure test first pressure gauge. The first end and the second end of the second working oil port of the ultra-high pressure test reversing valve are respectively connected to the inlet end of the ultra-high pressure test second relief valve and the ultra-high pressure test second pressure gauge. The outlet ends of the ultra-high pressure test first relief valve and the ultra-high pressure test second relief valve are connected and then connected to the first end of the ultra-high pressure test second ball valve.The high-flow-rate testing oil circuit includes a first high-flow-rate testing ball valve, a high-flow-rate testing directional valve, a first high-flow-rate testing relief valve, a second high-flow-rate testing relief valve, a first high-flow-rate testing pressure gauge, a second high-flow-rate testing pressure gauge, and a second high-flow-rate testing ball valve. The inlet end of the high-flow-rate testing directional valve is connected to the second end of the first high-flow-rate testing ball valve. The first and second ends of the first working port of the high-flow-rate testing directional valve are respectively connected to the inlet end of the first high-flow-rate testing relief valve and the first high-flow-rate testing pressure gauge. The first and second ends of the second working port of the high-flow-rate testing directional valve are respectively connected to the inlet end of the second high-flow-rate testing relief valve and the second high-flow-rate testing pressure gauge. The outlet ends of the first and second high-flow-rate testing relief valves are connected to the first end of the second high-flow-rate testing ball valve.

[0012] Preferably, the system oil circuit includes a second leakage flow meter, a second pump under test, a torque and speed sensor, a one-way valve before the second pump under test, a system oil temperature sensor, a system oil pressure sensor, and a second system pressure gauge. The first, second, and third ends of the second pump under test are respectively connected to the leakage flow meter, the torque and speed sensor, and the first end of the one-way valve before the second pump under test. The second end of the one-way valve before the second pump under test is sequentially connected to the system oil temperature sensor, the system oil pressure sensor, and the second system pressure gauge, and then connected to the first interface of the second system unloading ball valve in the second return oil circuit.

[0013] Preferably, the unloading oil circuit includes an ultra-high pressure electromagnetic relief valve, an ultra-high pressure electromagnetic relief valve front ball valve, a high-flow electromagnetic relief valve, and a high-flow electromagnetic relief valve front ball valve. The first end of the ultra-high pressure electromagnetic relief valve front ball valve and the first end of the high-flow electromagnetic relief valve front ball valve are connected to the second interface of the first end of the second system unloading ball valve in the second return oil circuit. The second end of the ultra-high pressure electromagnetic relief valve front ball valve is connected to the inlet end of the ultra-high pressure electromagnetic relief valve. The second end of the high-flow electromagnetic relief valve front ball valve is connected to the inlet end of the high-flow electromagnetic relief valve. The first and second interfaces of the ultra-high pressure electromagnetic relief valve and the high-flow electromagnetic relief valve, after being connected to their outlet ends, are respectively connected to the outlet end of the second replenishing pump electromagnetic relief valve in the replenishing oil circuit and the first end of the second return oil filter in the second return oil circuit.

[0014] Preferably, the second return oil circuit includes a back pressure relief valve, a second system unloading ball valve, a second return oil pressure sensor, a second return oil temperature sensor, a second return oil pressure gauge, a second return oil flow meter bypass ball valve, a second return oil flow meter pre-ball valve, a second return oil flow meter, a second return oil flow meter post-ball valve, and a second return oil filter. The first and second ends of the inlet of the back pressure relief valve are respectively connected to the second ends of the ultra-high pressure test second ball valve in the ultra-high pressure test oil circuit and the second ends of the large flow test second ball valve in the large flow test oil circuit. The first and second ends of the outlet of the back pressure relief valve are respectively connected to the outlet ends of the ultra-high pressure test reversing valve in the ultra-high pressure test oil circuit and the large flow test reversing valve in the large flow test oil circuit. The first, second, and third ports of the first end of the second system unloading ball valve are respectively connected to the return oil observation ball valve in the oil observation oil circuit. The first end of the valve, the first end of the first ball valve for ultra-high pressure testing in the ultra-high pressure test oil circuit, and the first end of the first ball valve for high flow testing in the high flow test oil circuit are connected. The third end of the outlet of the back pressure relief valve, the second end of the second system unloading ball valve, the first interface and the second interface of the second return oil pressure sensor, the second return oil temperature sensor, and the second return oil pressure gauge connected in sequence are respectively connected to the first ends of the ball valve before the second return oil flow meter and the bypass ball valve of the second return oil flow meter. The first end of the second return oil flow meter is connected to the second end of the ball valve before the second return oil flow meter. The second end of the second return oil flow meter is connected to the first end of the ball valve after the second return oil flow meter. The first interface and the second interface of the second end of the ball valve after the second return oil flow meter are respectively connected to the bypass ball valve of the second return oil flow meter and the second end of the second return oil filter.

[0015] Preferably, the oil observation circuit includes an acrylic container, a return oil observation overflow valve, a return oil observation pressure gauge, and a return oil observation ball valve. The first and second ports of the second end of the return oil observation ball valve are respectively connected to the inlet end of the return oil observation overflow valve and the return oil observation pressure gauge. The first end of the acrylic container is connected to the outlet end of the return oil observation overflow valve.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. This invention can conduct comprehensive performance testing on ultra-high pressure hydraulic pumps of different types and under different pressures in high-end mobile equipment fields such as aerospace, engineering machinery and robots. The system adopts a modular design of oil replenishment valve group, pressure regulating valve group, auxiliary control valve group, press rodless chamber control valve group and loading valve group, which has the characteristics of high integration and high reliability.

[0018] 2. This invention simulates ultra-high pressure load by setting up a loading valve group and an intelligent press, and sets up a reserved valve group for connecting other loads to the system or for testing directional valves. This allows the ultra-high pressure hydraulic pump to have multiple load options during the test, making the test process more consistent with actual operating conditions and reflecting the differences in the working performance of the ultra-high pressure pump under different loads.

[0019] 3. This invention uses an auxiliary control valve group for control, and uses an electromagnet to control the low-pressure hydraulic system. The low-pressure hydraulic system controls the opening and closing of the ultra-high pressure hydraulic control check valve, thereby controlling the connection and switching of the ultra-high pressure circuit. It controls step by step and has the characteristics of high reliability, safety and stability and long service life.

[0020] 4. This invention incorporates an ultra-high pressure test valve group and a high-flow test valve group, enabling performance curve testing, speed and torque testing, pressure shock testing, temperature rise testing, self-priming testing, overspeed testing, and full-load testing of the ultra-high pressure pump and the high-flow pump respectively, and outputting the test curves to achieve comprehensive pump performance testing. Simultaneously, this invention includes oil pressure and temperature sensors in the replenishment oil circuit, the test pump outlet, and the return oil circuit, and includes a return oil observation circuit, allowing for observation and sampling of the oil after pressure changes in an acrylic container, providing better monitoring of the oil's state throughout the system. Attached Figure Description

[0021] Figure 1 This is a hydraulic schematic diagram of the first test system in the performance testing system for ultra-high pressure hydraulic pumps of the present invention.

[0022] Figure 2 This is a hydraulic schematic diagram of the second test system in the performance testing system for ultra-high pressure hydraulic pumps of the present invention.

[0023] Figure 3 This is a graph showing the performance testing system of the ultra-high pressure hydraulic pump used in this invention.

[0024] Key reference numerals:

[0025] The system includes: first oil cooling circuit 100, replenishing valve assembly 200, first replenishing pump solenoid relief valve 201, first suction temperature sensor 202, first suction pressure sensor 203, first replenishing pump inlet ball valve 204, self-suction ball valve 205, pressure regulating valve assembly 300, main pump relief valve 301, system pressure sensor 302, main pump inlet check valve 303, system unloading hydraulic control check valve 304, first return oil circuit 400, first system unloading ball valve 401, first return oil temperature sensor 402, first return oil pressure sensor 403, first return oil flow meter inlet ball valve 404, first return oil flow meter 405, first return oil flow meter outlet ball valve 406, first return oil flow meter bypass ball valve 407, and first return oil filter 408. Auxiliary control valve assembly 500, first solenoid relief valve 501 before auxiliary pump unit, first check valve 502 before auxiliary pump unit, oil unloading control valve 503 for the rod chamber of the press, hydraulically controlled check valve 504 for the rod chamber of the press, overflow valve 505 for the rod chamber of the press, hydraulically controlled check valve 506 for the rodless chamber of the press, hydraulically controlled check valve 507 for the loading valve assembly, hydraulically controlled check valve 508 for system unloading, second check valve 509 before auxiliary pump unit, second solenoid relief valve 510 before auxiliary pump unit, control valve assembly 600 for the rodless chamber of the press, hydraulically controlled check valve 601 for oil unloading in the rodless chamber of the press, throttle valve 602 for the rodless chamber of the press, oil unloading control valve 603 for oil unloading in the rodless chamber of the press, hydraulically controlled check valve 604 for oil inlet in the rodless chamber of the press, loading valve assembly 700, loading valve Group 1: First hydraulically controlled check valve 701; Loading valve group 2: Second hydraulically controlled check valve 702; Loading valve group 1: First relief valve 703; Loading valve group 2: Second relief valve 704; Loading valve group 705: Back pressure valve; Reserved valve group 800; Reserved valve group ball valve 801; Reserved valve group unloading ball valve 802; Reserved valve group relief valve 803; Reserved valve group relief valve front ball valve 804; Reserved valve group directional valve 805; Reserved valve group 1: First pressure sensor 806; Reserved valve group 2: Second pressure sensor 807; Dual one-way throttle valve 808; First quick-connect coupling 809; Second quick-connect coupling 810; First replenishing pump 1; First leakage flow meter 2; First tested pump 3; Leakage flow meter 4; First system pressure gauge 5; First loading pressure gauge 6; Second loading pressure gauge 7. Back pressure gauge; 8. Reserved first pressure gauge; 9. Reserved second pressure gauge; 10. First return oil pressure gauge; 11. Press rodless chamber pressure gauge; 12. Intelligent press; 13. Press return pressure gauge; 14. Double auxiliary pump unit; 15. Control pressure gauge; 16. First solenoid relief valve 501 (electrode 1YA) before auxiliary pump unit; first oil replenishment pump solenoid relief valve 201 (electrode 2YA); left position solenoid 3YA of press rod chamber unloading control valve 503; right position solenoid 4YA of press rod chamber unloading control valve 503; left position solenoid 5YA of press rodless chamber hydraulic control check valve 506; right position solenoid 6YA of press rodless chamber hydraulic control check valve 506; left position solenoid 7YA of loading valve group hydraulic control check valve 507.The system includes: a loading valve group hydraulic control check valve 507 (right position solenoid 8YA); a system unloading hydraulic control check valve 508 (solenoid 9YA); an auxiliary pump unit front second solenoid relief valve 510 (solenoid 10YA); a compressor rodless chamber unloading control valve 603 (solenoid 11YA); a reserved valve group reversing valve 805 (left position solenoid 12YA); a reserved valve group reversing valve 805 (right position solenoid 13YA); a second oil cooling circuit 1100; a system oil circuit 1200; a second leakage flow meter 1201; a second tested pump 1202; a torque and speed sensor 1203; a second tested pump front check valve 1204; a system oil temperature sensor 1205; a system oil pressure sensor 1206; a second system pressure gauge 1207; and an unloading oil circuit 1300. Ultra-high pressure electromagnetic relief valve 1301, ultra-high pressure electromagnetic relief valve front ball valve 1302, large flow electromagnetic relief valve front ball valve 1303, large flow electromagnetic relief valve 1304, replenishing oil circuit 1400, second replenishing oil pump 1401, second replenishing oil pump electromagnetic relief valve 1402, second replenishing oil pump front ball valve 1403, self-suction oil check valve 1404, suction flow meter front ball valve 1405, suction flow meter bypass ball valve 1406, suction flow meter front throttle valve 1407, suction flow meter 1408, suction flow meter rear ball valve 1409, suction pressure gauge 1410, second suction pressure sensor 1411, second suction temperature sensor 1412, second return oil circuit 1500, back pressure relief valve 1501, second system unloading ball valve 1 502, Second Return Oil Pressure Sensor; 1503, Second Return Oil Temperature Sensor; 1504, Second Return Oil Pressure Gauge; 1505, Second Return Oil Flow Meter Bypass Ball Valve; 1506, Second Return Oil Flow Meter Front Ball Valve; 1507, Second Return Oil Flow Meter; 1508, Second Return Oil Flow Meter Rear Ball Valve; 1509, Second Return Oil Filter; 1510, Oil Observation Circuit; 1600, Acrylic Glass Container; 1601, Return Oil Observation Overflow Valve; 1602, Return Oil Observation Pressure Gauge; 1603, Return Oil Observation Ball Valve; 1604, Ultra-High Pressure Test Circuit; 1700, Ultra-High Pressure Test First Ball Valve; 1701, Ultra-High Pressure Test Directional Valve; 1702, Ultra-High Pressure Test First Overflow Valve; 1703, Ultra-High Pressure Test Second Overflow Valve; 1704, Ultra-High Pressure Test First Pressure Valve. Table 1705, Second pressure gauge for ultra-high pressure test; 1706, Second ball valve for ultra-high pressure test; 1707, Oil circuit for high flow test; 1800, First ball valve for high flow test; 1801, Reversing valve for high flow test; 1802, First relief valve for high flow test; 1803, Second relief valve for high flow test; 1804, First pressure gauge for high flow test; 1805, Second pressure gauge for high flow test; 1806, Second ball valve for high flow test; 1807, Solenoid relief valve for second replenishing pump; 1402, Solenoid 01YA; Solenoid relief valve for ultra-high pressure test; 1301, Solenoid 02YA; Solenoid relief valve for high flow test; 1304, Solenoid 03YA; Reversing valve for ultra-high pressure test; 1702, Solenoid 04YA; Reversing valve for high flow test; 1802, Solenoid 05YA. Detailed Implementation

[0026] To provide a detailed description of the technical content, objectives, and effects of this invention, the following description will be provided in conjunction with the accompanying drawings.

[0027] In this specific embodiment, the technical term "ultra-high pressure" generally refers to working pressures exceeding 32 MPa in hydraulic engineering. Within the ultra-high pressure range, the most commonly used pressure is 60–80 MPa, and hydraulic pumps with this pressure level are called ultra-high pressure pumps, while hydraulic components with this pressure level are called ultra-high pressure hydraulic components.

[0028] The first test system for performance testing systems of ultra-high pressure hydraulic pumps, such as Figure 1 As shown, the system includes a first oil cooling circuit 100, a replenishing valve assembly 200, a pressure regulating valve assembly 300, a first return oil circuit 400, an auxiliary control valve assembly 500, a press rodless chamber control valve assembly 600, a loading valve assembly 700, and a reserved valve assembly 800. The first replenishing pump 1, the first tested pump 3, and the dual auxiliary pump unit 15 provide energy and power to the hydraulic system, respectively. The function of the first leakage flow meter 2 is to detect the leakage flow of the first tested pump 3. The intelligent press 13 provides a load to the first tested pump 3.

[0029] The function of the oil cooling circuit 100 is to filter impurities in the cooling system oil within a specified temperature range, so as to keep the oil in the ultra-high pressure system clean and stable and improve the service life of the system.

[0030] The replenishing valve assembly 200 includes a first replenishing pump solenoid relief valve 201, a first suction temperature sensor 202, a first suction pressure sensor 203, a first replenishing pump front ball valve 204, and an autonomous suction ball valve 205. The first and second ends of the inlet of the first replenishing pump solenoid relief valve 201 are respectively connected to the first end of the first replenishing pump front ball valve 204 and the outlet end of the first replenishing pump 1. The second end of the first replenishing pump front ball valve 204 is sequentially connected to the second ends of the first suction temperature sensor 202, the first suction pressure sensor 203, and the autonomous suction ball valve 205. The outlet end of the first replenishing pump solenoid relief valve 201 and the first end of the autonomous suction ball valve 205 are respectively connected to the mounting end of the oil tank.

[0031] The oil replenishment valve assembly 200 replenishes oil to the first pump under test 3 to prevent cavitation during ultra-high pressure operation. When the electromagnet 2YA of the first oil replenishment pump solenoid relief valve 201 is energized, the first oil replenishment pump solenoid relief valve 201 takes effect, regulating the oil supply pressure of the first oil replenishment pump 1. The first oil suction temperature sensor 202 detects the oil suction temperature of the first pump under test 3, and the first oil suction pressure sensor 203 detects the oil suction pressure of the first oil replenishment pump 1. When the system meets the oil suction requirements of the first pump under test 3, the ball valve 204 before the first oil replenishment pump is closed, and the self-suction ball valve 205 is opened, allowing the first pump under test 3 to directly draw oil from the oil tank. When the system does not meet the oil suction requirements of the first pump under test 3, and cavitation occurs, the ball valve 204 before the first oil replenishment pump is opened, and the self-suction ball valve 205 is closed, allowing the first oil replenishment pump 1 to start working, and the first pump under test 3 is supplied with oil by the first oil replenishment pump.

[0032] The pressure regulating valve assembly 300 includes a main pump overflow valve 301, a system pressure sensor 302, a main pump front check valve 303, and a system unloading hydraulic control check valve 304. The first and second ends of the inlet of the main pump overflow valve 301 are respectively connected to the outlet end of the first tested pump 3 and the inlet end of the main pump front check valve 303. The outlet end of the main pump overflow valve 301 and the first end of the system unloading hydraulic control check valve 304 are respectively connected to the first end of the first return oil filter 408 in the first return oil circuit 400. The first and second ends of the outlet of the main pump front check valve 303 are respectively connected to the second end of the system unloading hydraulic control check valve 304 and the system pressure sensor 302.

[0033] The pressure regulating valve group 300 is a system for regulating the stable pressure oil supply system at the outlet of the first tested pump 3. The main pump overflow valve 301 regulates the outlet pressure of the first tested pump 3. The system pressure sensor 302 detects and records the system pressure. The main pump front check valve 303 prevents the oil at the outlet of the first tested pump 3 from flowing back. The system unloading hydraulic control check valve 304 provides emergency pressure relief to the main system.

[0034] The first return oil circuit 400 includes a first system unloading ball valve 401, a first return oil temperature sensor 402, a first return oil pressure sensor 403, a ball valve 404 before the first return oil flow meter 405, a ball valve 406 after the first return oil flow meter 406, a bypass ball valve 407 for the first return oil flow meter, and a first return oil filter 408. The first end of the first system unloading ball valve 401 is connected to the second end of the system unloading hydraulic control check valve 304 in the pressure regulating valve group 300. The first, second, third, and fourth ports of the second end of the first system unloading ball valve 401 are respectively connected to the first return oil temperature sensor 402. The first end of the first return oil pressure sensor 403, the first return oil flow meter front ball valve 404, and the first return oil flow meter bypass ball valve 407 are connected. The second end of the first return oil flow meter front ball valve 404 is connected to the first end of the first return oil flow meter 405. The second end of the first return oil flow meter 405 is connected to the first end of the first return oil flow meter rear ball valve 406. The first and second interfaces of the second end of the first return oil flow meter rear ball valve 406 are respectively connected to the second end of the first return oil flow meter bypass ball valve 407 and the first end of the first return oil filter 408. The second end of the first return oil filter 408 is connected to the installation end of the oil tank.

[0035] The first return oil circuit 400 detects the state of the oil after system operation and directs the oil back to the oil tank. The first system unloading ball valve 401 controls the direct discharge of oil from the system. The first return oil temperature sensor 402 detects the temperature of the return oil, the first return oil pressure sensor 403 detects the pressure of the return oil, and the first return oil flow meter 405 detects the flow rate of the return oil. When it is necessary to detect the return oil flow rate, the ball valve 404 before the first return oil flow meter and the ball valve 406 after the first return oil flow meter are opened, and the bypass ball valve 407 of the first return oil flow meter is closed, allowing the oil to pass through the first return oil flow meter 405. When it is not necessary to detect the return oil flow rate, the ball valve 404 before the first return oil flow meter and the ball valve 406 after the first return oil flow meter are closed, and the bypass ball valve 407 of the first return oil flow meter is opened, allowing the oil to be filtered and purified by the first return oil filter 408 before flowing back to the oil tank.

[0036] The auxiliary control valve group 500 includes a first solenoid relief valve 501 before the auxiliary pump unit, a first check valve 502 before the auxiliary pump unit, a compressor rod chamber unloading control valve 503, a compressor rod chamber hydraulic check valve 504, a compressor rod chamber relief valve 505, a compressor rodless chamber hydraulic check valve control valve 506, a loading valve group hydraulic check valve control valve 507, a system unloading hydraulic check valve control valve 508, a second check valve 509 before the auxiliary pump unit, and a second solenoid relief valve 510 before the auxiliary pump unit. The first and second ends of the inlet of the first solenoid relief valve 501 before the auxiliary pump unit are respectively connected to the first end of the first check valve 502 before the auxiliary pump unit and the first outlet of the double auxiliary pump unit 15. The inlet, outlet, and first working end of the compressor rod chamber unloading control valve 503 are connected to the first working end of the first solenoid relief valve 501 before the auxiliary pump unit. The working oil port and the second working oil port are respectively connected to the second end of the first check valve 502 before the auxiliary pump unit, the outlet end of the first electromagnetic relief valve 501 before the auxiliary pump unit, the first end of the hydraulic control check valve 503 of the rod chamber of the press, and the control end of the hydraulic control check valve 504 of the rod chamber of the press. The inlet end and outlet end of the hydraulic relief valve 505 of the rod chamber of the press are respectively connected to the second end of the hydraulic control check valve 504 of the rod chamber of the press and the outlet end of the oil unloading control valve 503 of the rod chamber of the press. The inlet end of the second electromagnetic relief valve 510 before the auxiliary pump unit is connected to the second outlet of the double auxiliary pump unit 15. The outlet end of the second electromagnetic relief valve 510 before the auxiliary pump unit and the outlet end of the first electromagnetic relief valve 501 before the auxiliary pump unit are connected to the first end of the first return oil filter 408 in the first return oil circuit 400.

[0037] The first, second, and third ports of the second end of the second check valve 509 before the auxiliary pump unit are respectively connected to the inlet ends of the hydraulic control valve 506 of the compressor rodless chamber, the hydraulic control valve 507 of the loading valve group, and the hydraulic control valve 508 of the system unloading hydraulic control valve. The first end of the second check valve 509 before the auxiliary pump unit is connected to the working end of the second solenoid relief valve 510 before the auxiliary pump unit. The first working port and the second working port of the hydraulic control valve 506 of the compressor rodless chamber are connected to the working end of the second solenoid relief valve 510 before the auxiliary pump unit. The oil ports are respectively connected to the control terminals of the hydraulic control check valve 601 for unloading oil in the rodless chamber of the press and the hydraulic control check valve 604 for inlet oil in the rodless chamber of the press. The first and second working oil ports of the hydraulic control check valve 507 of the loading valve group are respectively connected to the control terminals of the first hydraulic control check valve 701 and the second hydraulic control check valve 702 of the loading valve group. The working oil port of the system unloading hydraulic control check valve 508 is connected to the control terminal of the system unloading hydraulic control check valve 304 in the pressure regulating valve group 300.

[0038] Auxiliary control valve group 500 controls the on / off of the main system oil circuit and the return stroke of the compressor. The first solenoid relief valve 501 before the auxiliary pump unit controls the oil supply pressure on the return side of the double auxiliary pump unit 15. The first check valve 502 before the auxiliary pump unit prevents backflow of oil supplied to the compressor during the return stroke. The compressor rod chamber unloading control valve 503 controls the on / off of the compressor rod chamber hydraulic control check valve 504. The compressor rod chamber relief valve 505 controls the holding pressure of the compressor rod chamber. The compressor rodless chamber hydraulic control check valve 506 controls the compressor rodless chamber unloading hydraulic control valve. The hydraulic control check valve 604 of the oil inlet valve 601 and the rodless chamber of the press controls the opening and closing of the first hydraulic control check valve 701 and the second hydraulic control check valve 702 of the loading valve group, the hydraulic control check valve 507 of the loading valve group controls the opening and closing of the unloading hydraulic control check valve 508 of the system controls the opening and closing of the unloading hydraulic control check valve 304 of the system, the second check valve 509 before the auxiliary pump unit prevents the backflow of oil supplied to the auxiliary control valve group, and the second solenoid relief valve 510 before the auxiliary pump unit controls the oil supply pressure on the auxiliary control valve side of the double auxiliary pump unit 15.

[0039] The press rodless chamber control valve assembly 600 includes a press rodless chamber oil unloading hydraulic control check valve 601, a press rodless chamber throttle valve 602, a press rodless chamber oil unloading control valve 603, and a press rodless chamber oil inlet hydraulic control check valve 604. The first port, second port, and third port of the first end of the press rodless chamber oil inlet hydraulic control check valve 604 are respectively connected to the second end of the press rodless chamber oil unloading hydraulic control check valve 601, the first end of the press rodless chamber throttle valve 602, and the rodless chamber oil port of the intelligent press 13. The inlet end of the press rodless chamber oil unloading control valve 603 is connected to the second end of the press rodless chamber throttle valve 602. The outlet end and working oil port of the press rodless chamber oil unloading control valve 603 are respectively connected to the first port and second port of the first end of the press rodless chamber oil unloading hydraulic control check valve 601.

[0040] The rodless chamber control valve group 600 controls the oil supply and unloading of the rodless chamber of the press; the rodless chamber unloading hydraulic control check valve 601 controls the unloading of the rodless chamber of the press; the rodless chamber throttle valve 602 adjusts the unloading speed of the rodless chamber of the press; the rodless chamber unloading control valve 603 controls the unloading of the rodless chamber of the press; and the rodless chamber inlet hydraulic control check valve 604 controls the ultra-high pressure oil supply of the rodless chamber of the press.

[0041] The loading valve assembly 700 includes a first hydraulically controlled check valve 701, a second hydraulically controlled check valve 702, a first relief valve 703, a second relief valve 704, and a back pressure valve 705. The first ends of the first hydraulically controlled check valve 701 and the second hydraulically controlled check valve 702 are respectively connected to the inlet ends of the first relief valve 703 and the second relief valve 704. The outlet ends of the first relief valve 703 and the second relief valve 704 are respectively connected to the first and second inlet ends of the back pressure valve 705.

[0042] The loading valve group 700 provides a simulated load for the ultra-high pressure pump test. The first hydraulic control check valve 701 and the second hydraulic control check valve 702 of the loading valve group control the opening and closing of the oil flow to the first relief valve 703 and the second relief valve 704 of the loading valve group, respectively. The back pressure valve 705 of the loading valve group gradually reduces the oil pressure after passing through the ultra-high pressure relief valve to ensure the long-term use of the oil.

[0043] The reserved valve assembly 800 includes a reserved valve assembly ball valve 801, a reserved valve assembly unloading ball valve 802, a reserved valve assembly overflow valve 803, a reserved valve assembly overflow valve front ball valve 804, a reserved valve assembly directional valve 805, a reserved valve assembly first pressure sensor 806, a reserved valve assembly second pressure sensor 807, a double one-way throttle valve 808, a first quick-connect coupling 809, and a second quick-connect coupling 810. The first end of the reserved valve assembly ball valve 801 is connected to the inlet end of the reserved valve assembly directional valve 805, and the first and second outlet ends of the reserved valve assembly directional valve 805 are respectively connected to the reserved valve assembly unloading ball valve 802. The first end of the ball valve 804 before the overflow valve of the reserved valve group is connected. The two ends of the overflow valve 803 of the reserved valve group are respectively connected to the second ends of the unloading ball valve 802 and the ball valve 804 before the overflow valve of the reserved valve group. The first working oil port and the second working oil port of the reversing valve 805 of the reserved valve group are respectively connected to the first pressure sensor 806 and the second pressure sensor 807 of the reserved valve group, and then respectively connected to the first end and the second end of the double one-way throttle valve 808. The third end and the fourth end of the double one-way throttle valve 808 are respectively connected to the first quick-connect joint 809 and the second quick-connect joint 810.

[0044] The reserved valve group 800 provides a reserved oil port for adding new loads to the system or testing ultra-high pressure hydraulic valves. The reserved valve group ball valve 801 controls the entry of ultra-high pressure oil into the reserved valve group. The reserved valve group unloading ball valve 802 opens the channel for the reserved valve group to flow back to the oil tank. The reserved valve group relief valve 803 provides back pressure for the return oil in the reserved valve group 800. The reserved valve group relief valve front ball valve 804 allows the return oil to pass through the reserved valve group relief valve 803. The reserved valve group reversing valve 805 reverses the oil supply and return in the reserved valve group 800. The reserved valve group first pressure sensor 806 and reserved valve group second pressure sensor 807 detect the oil supply and return pressure of the reserved valve group 800. The double one-way throttle valve 808 throttles the oil during the oil supply to regulate the flow rate. The quick-connect couplings 809 and 810 are used to connect to external circuits.

[0045] In a second aspect, the performance testing system for ultra-high pressure hydraulic pumps can test both ultra-high pressure pumps and high-flow pumps, preventing cavitation in the second pump under test 1202 during testing. It includes a replenishment oil circuit 1400 and an oil observation circuit 1600. Multiple oil parameter sensors are installed in the replenishment oil circuit 1400, the system oil circuit 1200, and the second return oil circuit 1100 to accurately detect the oil status at each stage of system operation. Directional valves are used for oil circuit switching, offering advantages such as fast response, reliability, and convenience. Figure 2 As shown, it includes a second oil cooling circuit 1100, a system oil circuit 1200, an oil unloading circuit 1300, an oil replenishment circuit 1400, a second return oil circuit 1500, an oil observation circuit 1600, an ultra-high pressure test circuit 1700, and a high flow test circuit 1800.

[0046] The second oil cooling circuit 1100 stabilizes the cooling system oil within a specified temperature range and filters impurities in the system oil, thereby extending the system's service life.

[0047] The system oil circuit 1200 includes a second leakage flow meter 1201, a second pump under test 1202, a torque and speed sensor 1203, a one-way valve 1204 before the second pump under test, a system oil temperature sensor 1205, a system oil pressure sensor 1206, and a second system pressure gauge 1207. The first, second, and third ends of the second pump under test 1202 are respectively connected to the first ends of the leakage flow meter 1201, the torque and speed sensor 1203, and the one-way valve 1204 before the second pump under test. The second end of the one-way valve 1204 before the second pump under test is sequentially connected to the system oil temperature sensor 1205, the system oil pressure sensor 1206, and the second system pressure gauge 1207, and then connected to the first interface of the first end of the second system unloading ball valve 1502 in the second return oil circuit 1500.

[0048] The system oil circuit 1200 provides power to the system and detects system operating parameters. The second leakage flow meter 1201 measures the leakage flow of the second pump under test 1202. The second pump under test 1202 provides oil and power to the system. The torque and speed sensor 1203 detects the speed and torque of the second pump under test 1202 during operation. The one-way valve 1204 before the second pump under test prevents backflow of oil at the outlet of the second pump under test 1202. The system oil temperature sensor 1205 detects the temperature of the system oil. The system oil pressure sensor 1206 detects the pressure of the system oil. The second system pressure gauge 1207 detects the system oil pressure.

[0049] The unloading oil circuit 1300 includes an ultra-high pressure electromagnetic relief valve 1301, an ultra-high pressure electromagnetic relief valve front ball valve 1302, a high-flow electromagnetic relief valve 1304, and a high-flow electromagnetic relief valve front ball valve 1303. The first ends of the ultra-high pressure electromagnetic relief valve front ball valve 1302 and the first ends of the high-flow electromagnetic relief valve front ball valve 1303 are connected to the second interface of the first end of the second system unloading ball valve 1502 in the second return oil circuit 1500. The ultra-high pressure electromagnetic relief valve front ball valve 1302... The second end is connected to the inlet end of the ultra-high pressure electromagnetic relief valve 1301. The second end of the ball valve 1303 before the large flow electromagnetic relief valve is connected to the inlet end of the large flow electromagnetic relief valve 1304. The first and second interfaces after the outlet ends of the ultra-high pressure electromagnetic relief valve 1301 and the large flow electromagnetic relief valve 1304 are respectively connected to the outlet end of the second oil replenishing pump electromagnetic relief valve 1402 in the oil replenishing circuit 1400 and the first end of the second return oil filter 1510 in the second return oil circuit 1500.

[0050] The oil unloading circuit 1300 establishes the test system pressure and provides emergency unloading to the test system under dangerous conditions. The ultra-high pressure electromagnetic relief valve 1301 establishes the system pressure during ultra-high pressure testing and provides emergency unloading to the test system under dangerous conditions. The high-flow electromagnetic relief valve 1304 establishes the system pressure during high-flow testing and provides emergency unloading to the test system under dangerous conditions. When the system is undergoing ultra-high pressure pump testing, the ball valve 1302 before the ultra-high pressure electromagnetic relief valve opens, and the ball valve 1303 before the high-flow electromagnetic relief valve closes, allowing system oil to flow to the ultra-high pressure electromagnetic relief valve 1301. When the system is undergoing high-flow pump testing, the ball valve 1302 before the ultra-high pressure electromagnetic relief valve closes, and the ball valve 1303 before the high-flow electromagnetic relief valve opens, allowing system oil to flow to the high-flow electromagnetic relief valve 1304.

[0051] The replenishment oil circuit 1400 includes a second replenishment oil pump 1401, a second replenishment oil pump solenoid relief valve 1402, a ball valve 1403 before the second replenishment oil pump, a self-suction oil check valve 1404, a ball valve 1405 before the suction flow meter, a bypass ball valve 1406 for the suction flow meter, a throttle valve 1407 before the suction flow meter, a suction flow meter 1408, a ball valve 1409 after the suction flow meter, a suction pressure gauge 1410, a second suction pressure sensor 1411, and a second suction temperature sensor 1412. The first interface and the second interface of the first end of the second replenishment oil pump 1401 are respectively connected to the inlet end of the second replenishment oil pump solenoid relief valve 1402 and the first end of the second replenishment oil pump ball valve 1403. The second end of ball valve 1403, the outlet end of self-suction check valve 1404, the first end of ball valve 1405 before the suction flow meter, and the first end of bypass ball valve 1406 before the suction flow meter are connected in sequence and then connected to the first end of throttle valve 1407 before the suction flow meter. The second end of throttle valve 1407 before the suction flow meter is connected to the first end of suction flow meter 1408. The second end of suction flow meter 1408 is connected to the first end of ball valve 1409 after the suction flow meter. The second end of ball valve 1409 after the suction flow meter is connected to the second end of bypass ball valve 1406 before being connected in sequence and then connected to suction pressure gauge 1410, second suction pressure sensor 1411, and second suction temperature sensor 1412.

[0052] The oil replenishment circuit 1400 replenishes oil to the second tested pump 1202 to prevent cavitation under ultra-high pressure and high flow conditions. The second oil replenishment pump 1401 provides oil and power to the oil replenishment circuit. When the solenoid valve 01YA of the second oil replenishment pump solenoid relief valve 1402 is energized, the solenoid relief valve 1402 is activated, regulating the oil supply pressure of the second oil replenishment pump 1401. The ball valve 1403 before the second oil replenishment pump prevents backflow of oil before the second oil replenishment pump 1401. The self-suction check valve 1404 ensures that the system can directly draw oil from the oil tank when the second oil replenishment pump 1401 is not working. An oil suction flow meter 1408 is installed in the circuit. When the ball valve 1405 before the oil suction flow meter and the ball valve 1409 after the oil suction flow meter are open... When the bypass ball valve 1406 of the oil suction flow meter is closed, the oil circuit passes through the throttle valve 1407 before the oil suction flow meter and the oil suction flow meter 1408, thereby detecting the flow rate of the suction oil. The throttle valve 1407 before the oil suction flow meter adjusts and tests the self-priming capability of the second pump under test 1202. When the system does not need to detect the oil suction flow, the ball valve 1405 before the oil suction flow meter and the ball valve 1409 after the oil suction flow meter are closed, and the bypass ball valve 1406 of the oil suction flow meter is opened. The oil flows to the second pump under test 1202 through the bypass ball valve 1406 of the oil suction flow meter. The oil suction pressure gauge 1410 displays the oil suction pressure of the second pump under test 1202. The second oil suction pressure sensor 1411 detects the oil suction pressure of the second pump under test 1202, and the second oil suction temperature sensor 1412 detects the oil suction temperature of the second pump under test 1202.

[0053] The second return oil circuit 1500 includes a back pressure relief valve 1501, a second system unloading ball valve 1502, a second return oil pressure sensor 1503, a second return oil temperature sensor 1504, a second return oil pressure gauge 1505, a second return oil flow meter bypass ball valve 1506, a second return oil flow meter front ball valve 1507, a second return oil flow meter 1508, a second return oil flow meter rear ball valve 1509, and a second return oil filter 1510. The first and second ends of the inlet of the back pressure relief valve 1501 are respectively connected to the ultra-high pressure test oil. The second end of the second ball valve 1707 for ultra-high pressure testing in circuit 1700 is connected to the second end of the second ball valve 1807 for high-flow testing in circuit 1800. The first and second ends of the outlet of the back pressure relief valve 1501 are respectively connected to the outlet ends of the ultra-high pressure testing directional valve 1702 in circuit 1700 and the high-flow testing directional valve 1802 in circuit 1800. The first, second, and third ports of the first end of the second system unloading ball valve 1502 are respectively connected to the oil observation... The first end of the return oil observation ball valve 1604 in the oil circuit 1600, the first end of the ultra-high pressure test first ball valve 1701 in the ultra-high pressure test oil circuit 1700, and the first end of the large flow test first ball valve 1801 in the large flow test oil circuit 1800 are connected. The third end of the outlet of the back pressure relief valve 1501, the second end of the second system unloading ball valve 1502, the second return oil pressure sensor 1503, the second return oil temperature sensor 1504, and the second return oil pressure gauge 1505 are connected in sequence. The first and second interfaces are respectively connected to... The first end of the ball valve 1507 before the second return oil flow meter and the bypass ball valve 1506 of the second return oil flow meter are connected. The first end of the second return oil flow meter 1508 is connected to the second end of the ball valve 1507 before the second return oil flow meter. The second end of the second return oil flow meter 1508 is connected to the first end of the ball valve 1509 after the second return oil flow meter. The first and second ports of the second end of the ball valve 1509 after the second return oil flow meter are respectively connected to the second end of the bypass ball valve 1506 of the second return oil flow meter and the second return oil filter 1510.

[0054] The second return oil circuit 1500 detects the state of the oil after system operation and directs the oil back to the oil tank. The back pressure relief valve 1501 progressively reduces the pressure of the oil passing through the system to ensure long-term oil use. The second system unloading ball valve 1502 controls the direct discharge of system oil. The second return oil pressure sensor 1503 detects the return oil pressure. The second return oil temperature sensor 1504 and the second return oil pressure gauge 1505 respectively detect the return oil pressure. The second return oil flow meter 1... 508 detects the flow rate of the return oil. When it is necessary to detect the flow rate of the return oil, open the ball valve 1507 before the second return oil flow meter and the ball valve 1509 after the second return oil flow meter, and close the bypass ball valve 1506 of the second return oil flow meter. When it is not necessary to detect the return oil flow rate, close the ball valve 1507 before the second return oil flow meter and the ball valve 1509 after the second return oil flow meter, and open the bypass ball valve 1506 of the second return oil flow meter. Finally, the oil flows back to the oil tank after being purified by the second return oil filter 1510.

[0055] The oil observation circuit 1600 includes an acrylic container 1601, a return oil observation overflow valve 1602, a return oil observation pressure gauge 1603, and a return oil observation ball valve 1604. The first and second ports of the second end of the return oil observation ball valve 1604 are respectively connected to the inlet end of the return oil observation overflow valve 1602 and the return oil observation pressure gauge 1603. The first end of the acrylic container 1601 is connected to the outlet end of the return oil observation overflow valve 1602.

[0056] The oil observation circuit 1600 is used to observe and extract the characteristics of the oil after the system has been running. The plexiglass container 1601 is used to observe the reflux oil. The return oil observation overflow valve 1602 is used to load the reflux oil. The return oil observation pressure gauge 1603 detects the pressure of the return oil observation circuit. The return oil observation ball valve 1604 is used to control whether the system oil enters the oil observation circuit.

[0057] The ultra-high pressure test oil circuit 1700 includes an ultra-high pressure test first ball valve 1701, an ultra-high pressure test reversing valve 1702, an ultra-high pressure test first relief valve 1703, an ultra-high pressure test second relief valve 1704, an ultra-high pressure test first pressure gauge 1705, an ultra-high pressure test second pressure gauge 1706, and an ultra-high pressure test second ball valve 1707. The inlet end of the ultra-high pressure test reversing valve 1702 is connected to the second end of the ultra-high pressure test first ball valve 1701. The first working oil of the ultra-high pressure test reversing valve 1702... The first and second ends of the port are respectively connected to the inlet end of the first relief valve 1703 of the ultra-high pressure test and the first pressure gauge 1705 of the ultra-high pressure test. The first and second ends of the second working oil port of the ultra-high pressure test reversing valve 1702 are respectively connected to the inlet end of the second relief valve 1704 of the ultra-high pressure test and the second pressure gauge 1706 of the ultra-high pressure test. The outlet ends of the first relief valve 1703 and the second relief valve 1704 of the ultra-high pressure test are connected to the first end of the second ball valve 1707 of the ultra-high pressure test.

[0058] The ultra-high pressure test oil circuit 1700 is used to simulate and test the load of the ultra-high pressure pump. The first ultra-high pressure test ball valve 1701 controls the flow of oil in the system to the ultra-high pressure test oil circuit. The ultra-high pressure test reversing valve 1702 controls the connection of different simulated loads to the system. The first ultra-high pressure test relief valve 1703 and the second ultra-high pressure test relief valve 1704 are used to simulate the load of the second pump under test 1202, respectively. The first ultra-high pressure test pressure gauge 1705 and the second ultra-high pressure test pressure gauge 1706 are used to detect the oil pressure of the simulated load, respectively. The second ultra-high pressure test ball valve 1707 controls the flow of oil through the ultra-high pressure test oil circuit to the return oil circuit.

[0059] The high-flow-rate testing oil circuit 1800 includes a high-flow-rate testing first ball valve 1801, a high-flow-rate testing directional valve 1802, a high-flow-rate testing first relief valve 1803, a high-flow-rate testing second relief valve 1804, a high-flow-rate testing first pressure gauge 1805, a high-flow-rate testing second pressure gauge 1806, and a high-flow-rate testing second ball valve 1807. The inlet end of the high-flow-rate testing directional valve 1802 is connected to the second end of the high-flow-rate testing first ball valve 1801. The first working oil of the high-flow-rate testing directional valve 1802... The first and second ends of the port are respectively connected to the inlet end of the first relief valve 1803 and the first pressure gauge 1805 of the large flow test. The first and second ends of the second working port of the large flow test directional valve 1802 are respectively connected to the inlet end of the second relief valve 1804 of the large flow test and the second pressure gauge 1806 of the large flow test. The outlet ends of the first relief valve 1803 and the second relief valve 1804 of the large flow test are connected to the first end of the second ball valve 1807 of the large flow test.

[0060] The high-flow test oil circuit 1800 is used to simulate and test the load of the high-flow pump. The first ball valve 1801 controls the flow of oil in the control system to the high-flow test oil circuit. The high-flow test directional valve 1802 controls the connection of different simulated loads to the control system. The first relief valve 1803 and the second relief valve 1804 are used to simulate the load of the second pump under test 1202, respectively. The first pressure gauge 1805 and the second pressure gauge 1806 are used to detect the oil pressure of the simulated load, respectively. The second ball valve 1807 controls the flow of oil through the high-flow test oil circuit to the return oil circuit.

[0061] This invention has two specific embodiments. In Embodiment 1, the first testing device can test an ultra-high pressure hydraulic pump. By applying multiple load modes to the ultra-high pressure pump, including intelligent presses, loading valve groups, and other externally connectable loads, multiple load options are available for the ultra-high pressure pump test. In Embodiment 2, the second testing device can test both ultra-high pressure and high-flow hydraulic pumps, and includes a return oil observation circuit, allowing for observation and sampling of the oil in an acrylic container. Both embodiments include multiple sensors to monitor various data of the test pump and perform full-load tests, characteristic curve tests, and pressure shock tests.

[0062] The performance testing system for ultra-high pressure hydraulic pumps of the present invention will be further described below with reference to embodiments:

[0063] In this embodiment, the left and right electromagnets of the same solenoid valve cannot be energized simultaneously. When the left electromagnet is energized, the right electromagnet is de-energized by default.

[0064] Example 1:

[0065] The first testing device can perform performance tests on ultra-high pressure pumps under various loads. To facilitate the observation of data and troubleshooting during the testing process, multiple pressure gauges are set up in the testing system of this embodiment to display the pressure at different locations of the testing system. During the testing process, the difference between the pressure gauge data and the test data should be observed to quickly identify and eliminate faults in the testing system.

[0066] Among them, the suction pressure gauge 4 detects the suction pressure of the first pump under test 3, the first system pressure gauge 5 detects the system pressure at the outlet of the first pump under test 3, the first loading pressure gauge 6 and the second loading pressure gauge 7 respectively detect the pressure of the simulated load, the back pressure gauge 8 detects the back pressure of the system return oil, the reserved first pressure gauge 9 and the reserved second pressure gauge 10 respectively monitor the return oil and supply oil pressure during the external load test of the system, the first return oil pressure gauge 11 detects the system return oil pressure, the compressor rodless chamber pressure gauge 12 detects the rodless chamber pressure of the intelligent compressor 13, the compressor return pressure gauge 14 detects the supply oil pressure during the return process of the intelligent compressor 13, and the control pressure gauge 16 detects the supply oil pressure provided by the dual auxiliary pump unit 15 to the auxiliary control valve group.

[0067] In this embodiment, the test system meets the performance test requirements of an ultra-high pressure pump with a rated pressure of 70 MPa and a rated speed of 1500 r / min. It can monitor parameters such as leakage, flow rate, pressure, oil temperature, motor speed, and motor torque of the first tested pump 3, and output curves. The specific implementation process is as follows:

[0068] 1.1 Simulated load operating mode:

[0069] In this mode, the program locks the following: the first electromagnetic overflow valve 501 electromagnet 1YA, the left position electromagnet 3YA of the compressor rod unloading chamber control valve 503, the right position electromagnet 4YA of the compressor rod unloading chamber control valve 503, the left position electromagnet 5YA of the compressor rodless chamber hydraulic control check valve 506, and the right position electromagnet 6YA of the compressor rodless chamber hydraulic control check valve 506.

[0070] When the system is tested under ultra-high pressure, if the first pump under test 3 does not meet the oil suction requirement, the ball valve 204 before the first replenishing pump is opened and the self-suction ball valve 205 is closed. The oil is supplied from the first replenishing pump 1 to the first pump under test 3 through the ball valve 204 before the first replenishing pump. The first oil suction temperature sensor 202 detects the oil suction temperature and the first oil suction pressure sensor 203 detects the replenishing pressure.

[0071] When the system is tested under normal pressure, the first pump under test 3 draws oil, the ball valve 204 before the first replenishing pump is closed, the self-suction ball valve 205 is opened, the first replenishing pump 1 does not work, and the first pump under test 3 draws oil directly from the oil tank.

[0072] The outlet pressure of the first tested pump 3 is set by the main pump relief valve 301. The main pump relief valve 301 acts as a system safety valve, ensuring that the system pressure does not exceed the set pressure of the main pump relief valve 301.

[0073] During the test, the return oil temperature value of the first return oil temperature sensor 402 is monitored in real time. When the temperature exceeds the system tolerance value, the oil cooling circuit 100 is turned on to cool down the system oil.

[0074] In the simulated load working mode, the ultra-high pressure pump can be tested for full load, characteristic curve, pressure shock, overspeed, displacement verification, no-load, efficiency check and external leakage check.

[0075] In this embodiment, a full-load test, characteristic curve test and pressure shock test were conducted on an ultra-high pressure pump with a rated pressure of 70MPa and a rated speed of 1500r / min.

[0076] Full load test:

[0077] S1. Close the first system unloading ball valve 401 to establish pressure in the ultra-high pressure system, and then close the ball valve 404 before the first return oil flow meter and the ball valve 406 after the first return oil flow meter in sequence. Open the bypass ball valve 407 of the first return oil flow meter to allow the system oil to flow smoothly back to the oil tank.

[0078] S2. Start the dual auxiliary pump unit 15 and de-energize all the solenoids of the control valves in the system. Energize the solenoid 10YA of the second solenoid relief valve 510 in front of the auxiliary pump unit. Adjust the oil supply pressure on the auxiliary control valve side according to the reading of the control pressure gauge 16. The oil enters the hydraulic control valve 507 and the system unloading hydraulic control valve 508 of the loading valve group through the second check valve 509 in front of the auxiliary pump unit. When the test system malfunctions, energize the solenoid 9YA of the system unloading hydraulic control valve 508, thereby opening the system unloading hydraulic control valve 304. The oil flows back to the oil tank through the return oil circuit 400, and the system is depressurized.

[0079] S3. Adjust the speed of the first tested pump 3 to 300 r / min, energize the left-position solenoid 7YA of the hydraulic control valve 507 of the loading valve group, and control the first hydraulic control check valve 701 of the loading valve group to open, so that the ultra-high pressure oil in the system flows through the first hydraulic control check valve 701 of the loading valve group to the first relief valve 703 and the back pressure valve 705 of the loading valve group, and then flows to the oil tank through the return oil circuit 400; adjust the pressure of the back pressure valve 705 of the loading valve group to 5 MPa, the pressure of the first relief valve 703 of the loading valve group to the rated pressure of 70 MPa, adjust the speed of the first tested pump 3 to the rated speed of 1500 r / min, and run continuously for 15 minutes. Output the speed-time curve and pressure-time curve of the system through the data of the motor encoder of the first tested pump 3 and the system pressure sensor 302.

[0080] Characteristic curve test:

[0081] S1. Close the first system unloading ball valve 401 to establish pressure in the ultra-high pressure system, and then close the ball valve 404 before the first return oil flow meter and the ball valve 406 after the first return oil flow meter in sequence. Open the bypass ball valve 407 of the first return oil flow meter to allow the system oil to flow smoothly back to the oil tank through the first return oil flow meter 405.

[0082] S2. Start the dual auxiliary pump unit 15 and de-energize all the solenoids of the control valves in the system. Energize the solenoid 10YA of the second solenoid relief valve 510 in front of the auxiliary pump unit. Adjust the oil supply pressure on the auxiliary control valve side according to the reading of the control pressure gauge 16. The oil enters the hydraulic control valve 507 and the system unloading hydraulic control valve 508 of the loading valve group through the second check valve 509 in front of the auxiliary pump unit. When the test system malfunctions, energize the solenoid 9YA of the system unloading hydraulic control valve 508, thereby opening the system unloading hydraulic control valve 304. The oil flows back to the oil tank through the return oil circuit 400, and the system is depressurized.

[0083] S3. Adjust the speed of the first tested pump 3 to 300 r / min, energizing the left-position solenoid 7YA of the hydraulic control valve 507 of the loading valve group, controlling the opening of the first hydraulic control check valve 701 of the loading valve group, allowing the ultra-high pressure oil in the system to flow through the first hydraulic control check valve 701 of the loading valve group to the first relief valve 703 and the back pressure valve 705 of the loading valve group, and then to the oil tank through the return oil circuit 400; adjust the pressure of the back pressure valve 705 of the loading valve group to 5 MPa, adjust the pressure of the first relief valve 703 of the loading valve group to control the load pressure, adjust the speed of the first tested pump 3, and through the first tested pump 3 The motor encoder reads the speed and torque of the first pump under test, the leakage of the ultra-high pressure pump under test is read through the first leakage flow meter 2, the system pressure is read through the system pressure sensor 302, the return oil pressure is read through the first return oil pressure sensor 403, the return oil temperature is read through the first return oil temperature sensor 402, and the return oil flow is read through the first return oil flow meter 405. Then, the system outputs characteristic curves such as the total efficiency-speed curve, system pressure-speed curve, torque-speed curve, flow-pressure curve, volumetric efficiency-pressure curve, total efficiency-pressure curve, speed-time curve, and torque-pressure curve.

[0084] Pressure shock test:

[0085] S1. Close the first system unloading ball valve 401 to establish pressure in the ultra-high pressure system, and then close the ball valve 404 before the first return oil flow meter and the ball valve 406 after the first return oil flow meter in sequence. Open the bypass ball valve 407 of the first return oil flow meter to allow the system oil to flow smoothly back to the oil tank.

[0086] S2. Start the dual auxiliary pump unit 15 and de-energize all the solenoids of the control valves in the system. Energize the solenoid 10YA of the second solenoid relief valve 510 in front of the auxiliary pump unit. Adjust the oil supply pressure on the auxiliary control valve side according to the reading of the control pressure gauge 16. The oil enters the hydraulic control valve 507 and the system unloading hydraulic control valve 508 of the loading valve group through the second check valve 509 in front of the auxiliary pump unit. When the test system malfunctions, energize the solenoid 9YA of the system unloading hydraulic control valve 508, thereby opening the system unloading hydraulic control valve 304. The oil flows back to the oil tank through the return oil circuit 400, and the system is depressurized.

[0087] S3. Adjust the speed of the first tested pump 3 to 300 r / min, energizing the left-position solenoid 7YA of the hydraulic control valve 507 of the loading valve group, controlling the opening of the first hydraulic control check valve 701 of the loading valve group, allowing the ultra-high pressure oil in the system to flow through the first hydraulic control check valve 701 of the loading valve group to the first relief valve 703 and the back pressure valve 705 of the loading valve group, and then to the oil tank through the return oil circuit 400; adjust the pressure of the back pressure valve 705 of the loading valve group to 5 MPa, and adjust the pressure of the first relief valve 703 of the loading valve group to the rated pressure of 70 MPa; energize the right-position solenoid 8YA of the hydraulic control valve 507 of the loading valve group, controlling the opening of the second hydraulic control check valve 702 of the loading valve group. Open the valve to allow the ultra-high pressure oil in the system to flow through the second hydraulically controlled check valve 702 of the loading valve group to the second overflow valve 704 of the loading valve group. Adjust the pressure of the second overflow valve 704 of the loading valve group to 7MPa. Adjust the speed of the first tested pump 3 to the rated speed of 1500r / min. Switch the left position solenoid 7YA and the right position solenoid 8YA of the hydraulically controlled check valve 507 of the loading valve group to be energized alternately, thereby controlling the first tested pump 3 to connect to simulated loads of different pressures. The impact frequency is 10-30 times / min, and the impact continues for 5 minutes. Measure the pump outlet pressure through the data of the system pressure sensor 302 and analyze the pressure-time curve.

[0088] 1.2 Compressor Load Mode:

[0089] In press load mode, the program locks the left position solenoid 7YA of the hydraulic control valve 507 of the loading valve group and the right position solenoid 8YA of the hydraulic control valve 507 of the loading valve group.

[0090] Pressing and return tests:

[0091] S1. Close the first system unloading ball valve 401 to establish pressure in the ultra-high pressure system, and then close the ball valve 404 before the first return oil flow meter and the ball valve 406 after the first return oil flow meter in sequence. Open the bypass ball valve 407 of the first return oil flow meter to allow the system oil to flow smoothly back to the oil tank.

[0092] S2. Start the dual auxiliary pump unit 15 and de-energize all the control valve solenoids in the system. Energize the solenoid 10YA of the second solenoid relief valve 510 in front of the auxiliary pump unit. Adjust the oil supply pressure on the auxiliary control valve side according to the reading of the control pressure gauge 16. The oil enters the hydraulic control valve 506 of the rodless chamber of the compressor and the hydraulic control valve 508 of the system unloading hydraulic control valve through the second check valve 509 in front of the auxiliary pump unit.

[0093] When the test system malfunctions, the solenoid 9YA of the system unloading hydraulic control check valve 508 is energized, thereby opening the system unloading hydraulic control check valve 304, and the oil flows back to the oil tank through the return oil circuit 400, thus depressurizing the system.

[0094] The first solenoid overflow valve 501 of the auxiliary pump unit is energized by electromagnet 1YA, and the oil supply pressure on the return side of the press is adjusted according to the reading of the press return pressure gauge 14. The oil enters the oil discharge control valve 503 of the rod chamber of the press through the first check valve 502 of the auxiliary pump unit.

[0095] S3, Pressing down: When the right-position solenoid 4YA of the oil discharge control valve 503 of the rod chamber of the press is energized, the pressure oil of the first check valve 502 before the auxiliary pump unit passes through the oil discharge control valve 503 of the rod chamber of the press and connects to the control oil circuit of the hydraulic check valve 504 of the rod chamber of the press. The hydraulic check valve 504 of the rod chamber of the press opens, and the oil circuit of the rod chamber of the intelligent press 13 is connected to the oil tank through the hydraulic check valve 504 of the rod chamber of the press.

[0096] Energize the right-position solenoid 6YA of the hydraulic control check valve 506 of the rodless chamber of the press, control the oil circuit of the hydraulic control check valve 604 of the rodless chamber of the press, open the hydraulic control check valve 604 of the rodless chamber of the press to inject the pressure oil of the ultra-high pressure system into the rodless chamber of the intelligent press 13, and adjust the speed of the first tested pump 3 to control the pressing speed of the press.

[0097] The leakage of the first pump under test is read by the first leakage flow meter 2, the outlet pressure of the first pump under test is tested by the system pressure sensor 302, and the speed and torque of the first pump under test are tested by the motor encoder. When the press is pressed down to the expected position, the right position solenoid 4YA of the oil discharge control valve 503 of the rod chamber of the press and the right position solenoid 6YA of the hydraulic control check valve 506 of the rodless chamber of the press are de-energized, and the press stops. At this time, the overflow valve 505 of the rod chamber of the press prevents the press from falling due to its own weight.

[0098] S4, Press Return: Energize the left position solenoid 5YA of the hydraulic control check valve 506 of the rodless chamber of the press, control the oil pressure connected to the hydraulic control check valve 601 of the rodless chamber of the press, open the hydraulic control check valve 601 of the rodless chamber of the press to connect the rodless chamber of the intelligent press 13 to the hydraulic oil tank, energize the solenoid 11YA of the hydraulic control valve 603 of the rodless chamber of the press, and allow the oil in the rodless chamber of the intelligent press 13 to connect to the hydraulic oil tank through the hydraulic control valve 602 of the rodless chamber of the press and the hydraulic control valve 603 of the hydraulic chamber, thereby increasing the return speed of the intelligent press 13;

[0099] When the left-position solenoid 3YA of the oil discharge control valve 503 of the rod chamber of the press is energized, the pressure oil of the first check valve 502 before the auxiliary pump unit enters the rod chamber of the intelligent press 13 through the oil discharge control valve 503 of the rod chamber of the press and the hydraulic check valve 504 of the rod chamber of the press, thereby controlling the return stroke of the intelligent press 13, and the return stroke pressure does not exceed the set pressure of the overflow valve 505 of the rod chamber of the press.

[0100] In the press load mode, the press rodless chamber oil discharge hydraulic control check valve 601, the press rodless chamber oil inlet hydraulic control check valve 604, the first hydraulic control check valve 701 of the loading valve group, and the second hydraulic control check valve 702 of the loading valve group maintain the pressure of the system. The pressure maintaining pressure is the system oil supply pressure.

[0101] 1.3 Other external load modes:

[0102] Other external loads include hydraulic cylinders, hydraulic valves, and motors. The oil inlet and return connections of these external loads are made at quick-connect couplings 809 and 810. The specific testing process is as follows:

[0103] S1. Close the first system unloading ball valve 401 to establish pressure in the ultra-high pressure system, and sequentially close the ball valve 404 before the first return oil flow meter and the ball valve 406 after the first return oil flow meter. Open the bypass ball valve 407 of the first return oil flow meter to allow the system oil to flow smoothly back to the oil tank through the first return oil flow meter 405. Open the reserved valve group ball valve 801 to ensure that the system pressure oil enters the reserved valve group 800.

[0104] When the external load requires back pressure or overflow loading, open the ball valve 804 before the overflow valve of the reserved valve group and close the unloading ball valve 802 of the reserved valve group, so that the overflow valve 803 of the reserved valve group can work and adjust the overflow pressure of the overflow valve 803 of the reserved valve group; when the external load does not require back pressure or overflow loading, close the ball valve 804 before the overflow valve of the reserved valve group and open the unloading ball valve 802 of the reserved valve group, so that the oil flows to the return oil circuit 400 and then flows back to the oil tank.

[0105] S2. Test Process: The reserved valve group reversing valve 805 controls the on / off and flow direction of the ultra-high pressure oil. When the left position solenoid 12YA of the reserved valve group reversing valve 805 is energized, the first quick-connect coupling 809 connects to the pressure oil, and the second quick-connect coupling 810 connects to the oil tank. At this time, the first pressure sensor 806 of the reserved valve group tests the oil supply pressure, and the second pressure sensor 807 of the reserved valve group tests the return oil pressure. The left side of the double one-way throttle valve 808 is responsible for regulating the flow rate into the external load. The opposite occurs when the right position solenoid 13YA of the reserved valve group reversing valve 805 is energized. The test curve is formed by the output data of the first pressure sensor 806, the second pressure sensor 807, the first return oil flow meter 405, the system pressure sensor 302, and the motor encoder.

[0106] Example 2:

[0107] 2.1 Ultra-high voltage test mode:

[0108] In the ultra-high pressure test mode, close the first ball valve 1801 for high-flow test, the return oil observation ball valve 1604, the second system unloading ball valve 1502, and the ball valve 1303 before the high-flow electromagnetic relief valve to prevent oil from entering other test circuits or flowing directly to the oil tank. Open the ball valve 1302 before the ultra-high pressure electromagnetic relief valve, the first ball valve 1701 for ultra-high pressure test, and the second ball valve 1707 for ultra-high pressure test to connect the oil to the ultra-high pressure electromagnetic relief valve 1301 and the ultra-high pressure test oil circuit 1700, establish oil pressure, and perform ultra-high pressure testing.

[0109] When the system is tested under ultra-high pressure, if the second pump under test 1202 does not meet the oil suction requirements, the ball valve 1403 before the second replenishing pump is opened, and the second replenishing pump 1401 is started. The oil is supplied from the second replenishing pump 1401 to the second pump under test 1202 through the ball valve 1403 before the second replenishing pump. When the electromagnet 01YA of the electromagnetic overflow valve 1402 of the second replenishing pump is energized, the replenishing pressure is established. The pressure is controlled by the overflow valve of the electromagnetic overflow valve 1402 of the second replenishing pump. The second oil suction pressure sensor 1411 detects the replenishing pressure, and the second oil suction temperature sensor 1412 detects the oil suction temperature.

[0110] When the system is tested under normal pressure, the second pump under test 1202 is sucking oil, the ball valve 1403 before the second replenishing pump is closed, the second replenishing pump 1401 does not work, and the second pump under test 1202 directly sucks oil from the oil tank through the self-suction check valve 1404.

[0111] When oil suction flow rate testing is required, open the front ball valve 1405 and the rear ball valve 1409 of the oil suction flow meter, and close the bypass ball valve 1406 of the oil suction flow meter. At this time, the oil flows through the front throttle valve 1407 and the oil suction flow meter 1408. The oil suction flow meter 1408 detects the oil suction flow rate, and the front throttle valve 1407 can adjust the magnitude of the oil suction flow rate. When oil suction flow rate testing is not required, close the front ball valve 1405 and the rear ball valve 1409 of the oil suction flow meter, and open the bypass ball valve 1406 of the oil suction flow meter. At this time, the oil flows through the bypass ball valve 1406 of the oil suction flow meter to the second pump under test 1202.

[0112] During the above test, the return oil temperature value of the second return oil temperature sensor 1504 is monitored in real time. When the temperature exceeds the system tolerance value, the oil cooling circuit 1100 is turned on to cool the system oil. When the oil temperature recovers, the oil cooling circuit 1100 stops working.

[0113] In the ultra-high pressure test mode, ultra-high pressure pumps can be tested for full load, characteristic curve, pressure shock, temperature rise, self-priming, overspeed, discharge verification, no-load, efficiency check, and external leakage check.

[0114] This embodiment uses an ultra-high pressure pump with a rated pressure of 70MPa and a rated speed of 1500r / min as an example to illustrate the specific process of pressure impact test and self-priming test.

[0115] Pressure shock test:

[0116] S1. Start the second tested pump 1202. The oil flows through the one-way valve 1204 before the second tested pump to the ultra-high pressure electromagnetic relief valve 1301 and the ultra-high pressure test reversing valve 1702, so that the electromagnet 02YA of the ultra-high pressure electromagnetic relief valve 1301 is energized to establish the pressure of the system oil circuit. The maximum pressure of the system is limited to 70MPa by adjusting the ultra-high pressure electromagnetic relief valve 1301.

[0117] S2. Adjust the speed of the second tested pump 1202 to 300 r / min, adjust the pressure of the first overflow valve 1703 of the ultra-high pressure test to the rated pressure of the ultra-high pressure pump 70 MPa, energize the electromagnet 04YA of the ultra-high pressure test reversing valve 1702, connect the second overflow valve 1704 of the ultra-high pressure test, adjust the pressure of the second overflow valve 1704 of the ultra-high pressure test to 7 MPa, adjust the speed of the second tested pump 1202 to the rated speed of 1500 r / min, switch the electromagnet 04YA of the ultra-high pressure test reversing valve 1702 to be alternately energized and de-energized, thereby controlling the second tested pump 1202 to connect to simulated loads of different pressures, with an impact frequency of 10-30 times / min, and the impact continues for 5 minutes. Measure the pump outlet pressure through the data of the system oil pressure sensor 1206, and analyze the pressure-time curve.

[0118] Self-priming test:

[0119] S1. Start the second pump under test 1202. The oil flows through the one-way valve 1204 before the second pump under test to the ultra-high pressure electromagnetic overflow valve 1301 and the ultra-high pressure test reversing valve 1702, so that the electromagnet 02YA of the ultra-high pressure electromagnetic overflow valve 1301 is de-energized. Adjust the speed of the second pump under test 1202 to the rated speed of 1500 r / min, so that the second pump under test 1202 runs unloaded at the rated speed for 5 minutes.

[0120] S2. Open the ball valve 1403 before the second replenishing pump, start the second replenishing pump 1401, observe the suction pressure gauge 1410 and the second suction pressure sensor 1411, and run the replenishing pressure below 0.5MPa for 1 minute. Open the ball valve 1405 before the suction flow meter and the suction flow meter 1408, and close the bypass ball valve 1406 of the suction flow meter. The replenishing oil passes through the throttle valve 1407 before the suction flow meter and the suction flow meter 1408. By adjusting the throttle orifice size of the throttle valve 1407 before the suction flow meter, and at the same time observing the feedback value of the second suction pressure sensor 1411, confirm that the pump inlet is in a vacuum state (i.e., the pressure value is 0.1MPa), and use this as a reference.

[0121] S3. Based on the actual flow rate of the second pump under test 1202 measured by the oil suction flow meter 1408, the suction resistance at the inlet of the second pump under test is linearly increased by adjusting the size of the throttle orifice of the throttle valve 1407 before the oil suction flow meter until the actual flow rate of the pump decreases by 1%. Based on the feedback value of the second oil suction pressure sensor 1411, the vacuum degree at the inlet of the second pump under test 1202 is tested, and a pressure-time curve is generated.

[0122] 2.2 High-traffic test mode:

[0123] In the high-flow test mode, the first ball valve 1701 for ultra-high pressure test, the return oil observation ball valve 1604, the second system unloading ball valve 1502, and the ball valve 1302 before the ultra-high pressure solenoid relief valve are closed in sequence to prevent oil from entering other test circuits or flowing directly to the oil tank. The ball valve 1303 before the high-flow solenoid relief valve, the first ball valve 1801 for high-flow test, and the second ball valve 1807 for high-flow test are opened. By energizing and de-energizing the solenoid 03YA of the high-flow solenoid relief valve 1304 and the solenoid 05YA of the high-flow test reversing valve 1802, the oil is connected to the high-flow solenoid relief valve 1304 and the high-flow test oil circuit 1800, establishing oil pressure and performing the high-flow test.

[0124] In the high-flow test mode, high-pressure, high-flow pumps can be tested for full load, characteristic curve, pressure shock, temperature rise, self-priming, overspeed, displacement verification, no-load, efficiency check, and external leakage check.

[0125] 2.3 Oil Observation Test Mode:

[0126] In the oil observation test mode, the first ball valve 1801 for high flow test, the first ball valve 1701 for ultra-high pressure test, the second system unloading ball valve 1502, and the ball valve 1303 before the high flow electromagnetic relief valve are closed in sequence to prevent oil from entering other test circuits or flowing directly to the oil tank. The return oil observation ball valve 1604 and the ball valve 1302 before the ultra-high pressure electromagnetic relief valve are opened to connect the oil to the ultra-high pressure electromagnetic relief valve 1301 and the oil observation circuit 1600, establish oil pressure, and perform oil observation test.

[0127] Oil observation test:

[0128] S1. Start the second tested pump 1202. The oil flows through the one-way valve 1204 before the second tested pump to the ultra-high pressure electromagnetic relief valve 1301 and the return oil observation relief valve 1602, so that the electromagnet 02YA of the ultra-high pressure electromagnetic relief valve 1301 is energized to establish the pressure of the system oil circuit. The maximum pressure of the system is limited to 70MPa by adjusting the ultra-high pressure electromagnetic relief valve 1301.

[0129] S2. Adjust the speed of the second tested pump 1202 to provide oil with different flow rates to the system oil circuit. Adjust the return oil and observe the pressure of the overflow valve 1602 to simulate the load pressure. Observe the state of the oil that rapidly decreases in pressure after passing through the ultra-high pressure through the plexiglass container 1601, and take samples for parameter detection. At the same time, the second suction oil pressure sensor 1411 detects the suction oil pressure, the second suction oil temperature sensor 1412 detects the suction oil temperature, the system oil temperature sensor 1205 detects the system oil temperature, the system oil pressure sensor 1206 detects the system oil pressure, the second return oil pressure sensor 1503 detects the return oil pressure, and the second return oil temperature sensor 1504 detects the return oil temperature, thereby reflecting the performance parameters and state of the oil when passing through the entire system.

[0130] This invention can test the comprehensive performance of ultra-high pressure pumps under various load conditions, including simulated loads, intelligent presses, and other external loads. It boasts advantages such as simple structure, high integration, and wide applicability. This invention can perform comprehensive performance testing on ultra-high pressure pumps as well as performance testing on high-flow pumps, making the testing system widely applicable. The testing system emphasizes oil condition monitoring, incorporating oil temperature and pressure sensors in the replenishment circuit, system circuit, and return circuit to monitor oil condition in real time. An oil observation circuit is also included to provide visual and comprehensive monitoring of the system's oil condition, extending the system's reliable operating time and service life. This invention, developed through experimental verification, is an ultra-high pressure pump testing system with multiple testing items, wide applicability, high precision, high reliability, and conformity to engineering practices.

[0131] In summary, the ultra-high pressure pump performance testing system provided by this invention offers numerous test items. Furthermore, through extensive simulation calculations and comparison of simulation results with experimental results, it can be clearly demonstrated that this ultra-high pressure pump performance testing system is a high-precision, practically applicable, efficient, and reliable hydraulic component testing device. Figure 3 The figure shows the test system curves, which obtained the performance test curves of the ultra-high pressure pump with step-by-step pressure and speed increase and stable operation at a rated pressure of 70MPa and a speed of 1550r / min.

[0132] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A performance testing system for an ultra-high pressure hydraulic pump, comprising a first oil cooling circuit, a replenishing valve group, a pressure regulating valve group, a first return oil circuit, an auxiliary control valve group, a compressor rodless chamber control valve group, a loading valve group, and a reserved valve group, characterized in that, The auxiliary control valve assembly includes a first solenoid relief valve before the auxiliary pump unit, a first check valve before the auxiliary pump unit, a compressor rod chamber unloading control valve, a compressor rod chamber hydraulic check valve, a compressor rod chamber relief valve, and a second solenoid relief valve before the auxiliary pump unit. The first and second ends of the inlet of the first solenoid relief valve before the auxiliary pump unit are respectively connected to the first end of the first check valve before the auxiliary pump unit and the first outlet of the double auxiliary pump unit. The inlet, outlet, first working port, and second working port of the compressor rod chamber unloading control valve are respectively connected to the second end of the first check valve before the auxiliary pump unit and the first outlet of the auxiliary pump unit. The outlet end of the first electromagnetic overflow valve before the unit, the first end of the hydraulic control check valve of the rod chamber of the compressor, and the control end of the hydraulic control check valve of the rod chamber of the compressor are connected. The inlet end and outlet end of the overflow valve of the rod chamber of the compressor are respectively connected to the second end of the hydraulic control check valve of the rod chamber of the compressor and the outlet end of the oil unloading control valve of the rod chamber of the compressor. The inlet end of the second electromagnetic overflow valve before the auxiliary pump unit is connected to the second outlet of the double auxiliary pump unit. The outlet end of the second electromagnetic overflow valve before the auxiliary pump unit and the outlet end of the first electromagnetic overflow valve before the auxiliary pump unit are connected to the first end of the first return oil filter in the first return oil circuit. The press rodless chamber control valve assembly includes a press rodless chamber oil unloading hydraulic control check valve, a press rodless chamber throttle valve, a press rodless chamber oil unloading control valve, and a press rodless chamber oil inlet hydraulic control check valve. The first port, second port, and third port of the first end of the press rodless chamber oil inlet hydraulic control check valve are respectively connected to the second end of the press rodless chamber oil unloading hydraulic control check valve, the first end of the press rodless chamber throttle valve, and the rodless chamber oil port of the intelligent press. The inlet end of the press rodless chamber oil unloading control valve is connected to the second end of the press rodless chamber throttle valve. The outlet end and working oil port of the press rodless chamber oil unloading control valve are respectively connected to the first port and second port of the first end of the press rodless chamber oil unloading hydraulic control check valve. The loading valve assembly includes a first hydraulically controlled check valve, a second hydraulically controlled check valve, a first relief valve, a second relief valve, and a back pressure valve. The first ends of the first and second hydraulically controlled check valves are respectively connected to the inlet ends of the first and second relief valves. The outlet ends of the first and second relief valves are respectively connected to the first and second inlet ends of the back pressure valve. The reserved valve group includes a reserved valve group ball valve, a reserved valve group unloading ball valve, a reserved valve group overflow valve, a reserved valve group upstream ball valve of the reserved valve group overflow valve, a reserved valve group directional valve, a reserved valve group first pressure sensor, a reserved valve group second pressure sensor, dual one-way throttle valves, a first quick-connect coupling, and a second quick-connect coupling. The first end of the reserved valve group ball valve is connected to the inlet end of the reserved valve group directional valve. The first and second outlet ends of the reserved valve group directional valve are respectively connected to the reserved valve group unloading ball valve and the upstream ball valve of the reserved valve group overflow valve. The first end of the ball valve is connected, and the two ends of the reserved valve group overflow valve are respectively connected to the second ends of the reserved valve group unloading ball valve and the ball valve before the reserved valve group overflow valve. The first working oil port and the second working oil port of the reserved valve group reversing valve are respectively connected to the first pressure sensor and the second pressure sensor of the reserved valve group, and then respectively connected to the first end and the second end of the double one-way throttle valve. The third end and the fourth end of the double one-way throttle valve are respectively connected to the first quick-connect fitting and the second quick-connect fitting.

2. The performance testing system for ultra-high pressure hydraulic pumps according to claim 1, characterized in that, The replenishing valve assembly includes a first replenishing pump solenoid relief valve, a first suction temperature sensor, a first suction pressure sensor, a first replenishing pump front ball valve, and a self-suctioning ball valve. The first and second ends of the inlet of the first replenishing pump solenoid relief valve are respectively connected to the first end of the first replenishing pump front ball valve and the outlet end of the first replenishing pump. The second end of the first replenishing pump front ball valve is sequentially connected to the first suction temperature sensor, the first suction pressure sensor, and the second end of the self-suctioning ball valve. The outlet end of the first replenishing pump solenoid relief valve and the first end of the self-suctioning ball valve are respectively connected to the mounting end of the oil tank.

3. The performance testing system for ultra-high pressure hydraulic pumps according to claim 1, characterized in that, The pressure regulating valve assembly includes a main pump overflow valve, a system pressure sensor, a main pump front check valve, and a system unloading hydraulic control check valve. The first and second ends of the inlet of the main pump overflow valve are respectively connected to the outlet end of the first pump under test and the inlet end of the main pump front check valve. The outlet end of the main pump overflow valve and the first end of the system unloading hydraulic control check valve are respectively connected to the first end of the first return oil filter in the first return oil circuit. The first and second ends of the outlet of the main pump front check valve are respectively connected to the second end of the system unloading hydraulic control check valve and the system pressure sensor.

4. The performance testing system for ultra-high pressure hydraulic pumps according to claim 1, characterized in that, The first return oil circuit includes a first system unloading ball valve, a first return oil temperature sensor, a first return oil pressure sensor, a ball valve before the first return oil flow meter, a first return oil flow meter, a ball valve after the first return oil flow meter, a bypass ball valve for the first return oil flow meter, and a first return oil filter. The first end of the first system unloading ball valve is connected to the second end of the system unloading hydraulic control check valve in the pressure regulating valve group. The first, second, third, and fourth interfaces of the second end of the first system unloading ball valve are respectively connected to the first ends of the first return oil temperature sensor, the first return oil pressure sensor, the ball valve before the first return oil flow meter, and the bypass ball valve for the first return oil flow meter. The second end of the ball valve before the first return oil flow meter is connected to the first end of the first return oil flow meter. The second end of the first return oil flow meter is connected to the first end of the ball valve after the first return oil flow meter. The first and second interfaces of the second end of the ball valve after the first return oil flow meter are respectively connected to the second end of the bypass ball valve for the first return oil flow meter and the first end of the first return oil filter. The second end of the first return oil filter is connected to the installation end of the oil tank.

5. The performance testing system for ultra-high pressure hydraulic pumps according to claim 1, characterized in that, The auxiliary control valve group further includes a hydraulically controlled check valve for the compressor rodless chamber, a hydraulically controlled check valve for the loading valve group, a hydraulically controlled check valve for the system unloading, and a second check valve before the auxiliary pump unit. The first, second, and third ports of the second end of the second check valve before the auxiliary pump unit are respectively connected to the inlet ends of the hydraulically controlled check valve for the compressor rodless chamber, the hydraulically controlled check valve for the loading valve group, and the hydraulically controlled check valve for the system unloading. The first end of the second check valve before the auxiliary pump unit and the second electromagnetic overflow valve before the auxiliary pump unit... The working ends of the valves are connected as follows: the first and second working ports of the hydraulic control valve of the rodless chamber of the press are respectively connected to the control ends of the hydraulic control check valve for unloading oil in the rodless chamber of the press and the hydraulic control check valve for inlet oil in the rodless chamber of the press; the first and second working ports of the hydraulic control check valve of the loading valve group are respectively connected to the control ends of the first and second hydraulic control check valves of the loading valve group; and the working port of the hydraulic control check valve of the system unloading hydraulic control check valve is connected to the control end of the system unloading hydraulic control check valve in the pressure regulating valve group.

6. A performance testing system for an ultra-high pressure hydraulic pump, comprising a second oil cooling circuit, a system oil circuit, an oil unloading circuit, an oil replenishment circuit, a second return oil circuit, an oil observation circuit, an ultra-high pressure testing circuit, and a high flow rate testing circuit, characterized in that, The replenishing oil circuit includes a second replenishing oil pump, a second replenishing oil pump solenoid relief valve, a ball valve before the second replenishing oil pump, a self-suction oil check valve, a ball valve before the suction flow meter, a bypass ball valve for the suction flow meter, a throttle valve before the suction flow meter, a suction flow meter, a ball valve after the suction flow meter, a suction pressure gauge, a second suction pressure sensor, and a second suction temperature sensor. The first and second ports of the first end of the second replenishing oil pump are respectively connected to the inlet end of the second replenishing oil pump solenoid relief valve and the first end of the second replenishing oil pump ball valve. The second end of the second replenishing oil pump ball valve and the self-suction oil check valve... The outlet end of the oil check valve, the first end of the ball valve before the oil suction flow meter, and the first end of the bypass ball valve of the oil suction flow meter are connected in sequence and then connected to the first end of the throttle valve before the oil suction flow meter. The second end of the throttle valve before the oil suction flow meter is connected to the first end of the oil suction flow meter. The second end of the oil suction flow meter is connected to the first end of the ball valve after the oil suction flow meter. The second end of the ball valve after the oil suction flow meter and the second end of the bypass ball valve of the oil suction flow meter are connected in sequence and then connected to the oil suction pressure gauge, the second oil suction pressure sensor, and the second oil suction temperature sensor. The ultra-high pressure test oil circuit includes an ultra-high pressure test first ball valve, an ultra-high pressure test reversing valve, an ultra-high pressure test first relief valve, an ultra-high pressure test second relief valve, an ultra-high pressure test first pressure gauge, an ultra-high pressure test second pressure gauge, and an ultra-high pressure test second ball valve. The inlet end of the ultra-high pressure test reversing valve is connected to the second end of the ultra-high pressure test first ball valve. The first end and the second end of the first working oil port of the ultra-high pressure test reversing valve are respectively connected to the inlet end of the ultra-high pressure test first relief valve and the ultra-high pressure test first pressure gauge. The first end and the second end of the second working oil port of the ultra-high pressure test reversing valve are respectively connected to the inlet end of the ultra-high pressure test second relief valve and the ultra-high pressure test second pressure gauge. The outlet ends of the ultra-high pressure test first relief valve and the ultra-high pressure test second relief valve are connected and then connected to the first end of the ultra-high pressure test second ball valve. The high-flow-rate testing oil circuit includes a first high-flow-rate testing ball valve, a high-flow-rate testing directional valve, a first high-flow-rate testing relief valve, a second high-flow-rate testing relief valve, a first high-flow-rate testing pressure gauge, a second high-flow-rate testing pressure gauge, and a second high-flow-rate testing ball valve. The inlet end of the high-flow-rate testing directional valve is connected to the second end of the first high-flow-rate testing ball valve. The first and second ends of the first working port of the high-flow-rate testing directional valve are respectively connected to the inlet end of the first high-flow-rate testing relief valve and the first high-flow-rate testing pressure gauge. The first and second ends of the second working port of the high-flow-rate testing directional valve are respectively connected to the inlet end of the second high-flow-rate testing relief valve and the second high-flow-rate testing pressure gauge. The outlet ends of the first and second high-flow-rate testing relief valves are connected to the first end of the second high-flow-rate testing ball valve.

7. The performance testing system for ultra-high pressure hydraulic pumps according to claim 6, characterized in that, The system oil circuit includes a second leakage flow meter, a second pump under test, a torque and speed sensor, a one-way valve before the second pump under test, a system oil temperature sensor, a system oil pressure sensor, and a second system pressure gauge. The first, second, and third ends of the second pump under test are respectively connected to the second leakage flow meter, the torque and speed sensor, and the first end of the one-way valve before the second pump under test. The second end of the one-way valve before the second pump under test is sequentially connected to the system oil temperature sensor, the system oil pressure sensor, and the second system pressure gauge, and then connected to the first interface of the second system unloading ball valve in the second return oil circuit.

8. The performance testing system for ultra-high pressure hydraulic pumps according to claim 6, characterized in that, The unloading oil circuit includes an ultra-high pressure electromagnetic relief valve, an ultra-high pressure electromagnetic relief valve front ball valve, a high-flow electromagnetic relief valve, and a high-flow electromagnetic relief valve front ball valve. The first end of the ultra-high pressure electromagnetic relief valve front ball valve and the first end of the high-flow electromagnetic relief valve front ball valve are connected to the second interface of the first end of the second system unloading ball valve in the second return oil circuit. The second end of the ultra-high pressure electromagnetic relief valve front ball valve is connected to the inlet end of the ultra-high pressure electromagnetic relief valve. The second end of the high-flow electromagnetic relief valve front ball valve is connected to the inlet end of the high-flow electromagnetic relief valve. The first and second interfaces of the ultra-high pressure electromagnetic relief valve and the high-flow electromagnetic relief valve, after being connected to their outlet ends, are respectively connected to the outlet end of the second replenishing pump electromagnetic relief valve in the replenishing oil circuit and the first end of the second return oil filter in the second return oil circuit.

9. The performance testing system for ultra-high pressure hydraulic pumps according to claim 6, characterized in that, The second return oil circuit includes a back pressure relief valve, a second system unloading ball valve, a second return oil pressure sensor, a second return oil temperature sensor, a second return oil pressure gauge, a second return oil flow meter bypass ball valve, a second return oil flow meter pre-ball valve, a second return oil flow meter, a second return oil flow meter post-ball valve, and a second return oil filter. The first and second inlet ends of the back pressure relief valve are respectively connected to the second ends of the ultra-high pressure test second ball valve in the ultra-high pressure test circuit and the second ends of the large flow test second ball valve in the large flow test circuit. The first and second outlet ends of the back pressure relief valve are respectively connected to the outlet ends of the ultra-high pressure test reversing valve in the ultra-high pressure test circuit and the large flow test reversing valve in the large flow test circuit. The first, second, and third ports of the first end of the second system unloading ball valve are respectively connected to the first port of the return oil observation ball valve in the oil observation circuit. One end is connected to the first end of the first ball valve for ultra-high pressure testing in the ultra-high pressure test oil circuit and the first end of the first ball valve for high flow testing in the high flow test oil circuit. The third end of the outlet of the back pressure relief valve, the second end of the second system unloading ball valve, the first interface and the second interface of the second return oil pressure sensor, the second return oil temperature sensor and the second return oil pressure gauge connected in sequence are respectively connected to the first ends of the ball valve before the second return oil flow meter and the bypass ball valve of the second return oil flow meter. The first end of the second return oil flow meter is connected to the second end of the ball valve before the second return oil flow meter. The second end of the second return oil flow meter is connected to the first end of the ball valve after the second return oil flow meter. The first interface and the second interface of the second end of the ball valve after the second return oil flow meter are respectively connected to the second end of the bypass ball valve of the second return oil flow meter and the second end of the second return oil filter.

10. The performance testing system for ultra-high pressure hydraulic pumps according to claim 6, characterized in that, The oil observation circuit includes an acrylic container, a return oil observation overflow valve, a return oil observation pressure gauge, and a return oil observation ball valve. The first and second ports of the second end of the return oil observation ball valve are respectively connected to the inlet end of the return oil observation overflow valve and the return oil observation pressure gauge. The first end of the acrylic container is connected to the outlet end of the return oil observation overflow valve.

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