High-speed two-way pump test board
The high-speed bidirectional pump test bench addresses high-speed testing needs at low cost by integrating a servo motor, speed increaser, and monitoring sensors, enhancing test accuracy and equipment longevity.
Patent Information
- Application Number
- CN202411578952.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-01-03
AI Technical Summary
Existing test benches face challenges in meeting high-speed requirements at low cost, and lack real-time monitoring of oil usage and maintenance, affecting test results and equipment life.
A high-speed bidirectional pump test bench equipped with a servo motor, speed increaser, oil replenishing pump, hydraulic oil tank, and cooling circulation system, along with sensors for hydraulic system monitoring, to achieve high-speed testing at reduced costs and extend equipment life.
The system reduces costs and improves cost performance while providing real-time monitoring of hydraulic system operations, ensuring accurate testing and extending the test bench's service life.
Smart Images
Figure CN119244509A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of automation equipment, and in particular to a high-speed bidirectional pump test bench. Background Art
[0002] While existing test benches meet the performance test requirements of the tested products, they often have some problems, such as the speed cannot meet the high-speed requirements with high cost performance, and the oil usage and maintenance requirements cannot be monitored in real time, thus affecting the test results of the tested products and the life of the equipment. For details, please refer to the hydraulic motor test system disclosed in CN117967648A and the hydraulic product pump comprehensive test system disclosed in CN104454792B. Therefore, a test bench that can solve these problems is urgently needed. Summary of the invention
[0003] In view of the above, an object of the present invention is to provide a high-speed bidirectional pump test bench to address the existing problems.
[0004] The bidirectional pump test bench in this scheme is provided with a servo motor connected to the pump under test, and a speed increaser is provided between the servo motor and the pump under test. The speed of the servo motor is 0-2000r / min. The speed ratio of the speed increaser is 3.5:1.
[0005] Furthermore, an oil replenishing pump is provided for replenishing oil for the pump under test.
[0006] Furthermore, a hydraulic oil tank is provided, and a cooling circulation pump is provided in conjunction with the hydraulic oil tank.
[0007] Beneficial effect: By using an ordinary non-high-speed 0-2000r / min servo motor with a speed increaser to output high speed, costs can be greatly reduced and product cost performance can be improved.
[0008] At the same time, by connecting some sensors to the hydraulic system life cycle monitoring module of the present invention, the operation of the hydraulic system can be monitored very intuitively, such as oil cleanliness, filter blockage, liquid level, liquid temperature and other data, which can provide a very good testing environment for the tested product and greatly extend the service life of the test bench. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is the schematic diagram of this application; Figure 2 , Figure 3 It is a schematic diagram of the three-dimensional structure of this application at different viewing angles; Reference numerals in the figure: oil replenishment pump motor 1, oil replenishment pump 2, one-way valve 3, third filter 4, oil replenishment overflow valve 5, second filter 6, cooling circulation motor 7, cooling circulation pump 8, oil leakage recovery filter 9, first motor pump group 10, oil tank air filter 11, second motor pump group 12, first filter 13, butterfly valve 14, loading valve 15, leakage flow meter 16, temperature sensor 17, pressure sensor 18, loading overflow valve 19, flow meter 20, pressure sensor 21, torque speed sensor 22, hydraulic oil tank 23, heater 24, servo motor 25, pneumatic ball valve 26, speed increaser 27, overflow valve 28, stop valve 29, tested pump 30, plate cooler 31, hydraulic system life cycle monitoring module 32, particle size detector 33, liquid level and temperature sensor 34. DETAILED DESCRIPTION
[0010] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0011] A bidirectional pump test bench is provided with a servo motor 25 connected to a pump 30 to be tested, and a speed increaser 27 is provided between the servo motor 25 and the pump 30 to be tested.
[0012] As a preferred embodiment, the speed of the servo motor 25 is 0-2000r / min, and its speed can be adjusted between 0-2000r / min; the speed ratio of the speed increaser 27 is 3.5:1, which allows the speed increaser 2 to output a speed of 0-7000r / min to drive the speed increaser output speed, meeting the performance test requirements of the tested product at high cost performance and high speed.
[0013] Reference Figure 1 The present invention is also provided with an oil replenishing pump 2 for replenishing oil for the tested pump 30, and an oil replenishing pump motor 1 for driving the oil replenishing pump 2, so as to prevent the tested pump 30 from being damaged due to being evacuated or running dry.
[0014] Reference Figure 1 The present invention is also provided with an oil replenishment relief valve 5 and a loading relief valve 19. The oil replenishment relief valve 5 is used to set the oil replenishment pressure, and the loading relief valve 19 provides a load pressure for the pump 30 under test.
[0015] Reference Figure 1 The present invention is further provided with a stop valve 29. When the stop valve 29 is opened, the load pressure of the measured pump 30 is at 0, and the no-load displacement of the measured pump 30 can be measured at this time.
[0016] Reference Figure 1The present invention is also provided with a hydraulic oil tank 23, and a cooling circulation pump 8 and a cooling circulation motor 7 driving the cooling circulation pump 8 are provided in conjunction with the hydraulic oil tank 23; the cooling circulation pump 8 can ensure the temperature of the hydraulic oil and the cleanliness of the hydraulic oil tank 23.
[0017] Reference Figure 1 The present invention further comprises a first motor pump group 10 and a second motor pump group 12. The first motor pump group 10 and the second motor pump group 12 are used to filter and pump the residual oil in the test disassembly process back to the hydraulic oil tank 23 again.
[0018] Reference Figure 1 The present invention is further provided with a loading valve 15, which is used to provide oil leakage pressure to the oil leakage port of the tested pump 30, so as to test the maximum pressure that the pump housing and oil seal of the tested pump 30 can withstand.
[0019] The main functions of the present invention include: No-load displacement: According to the reading of the flow meter 20 and the speed of the torque speed sensor 22 when no-load, the mechanical no-load displacement of the measured pump 30 can be calculated; then the loading valve 15 is used to provide the measured pump 30 with loading pressure, and then according to the speed and torque of the flow meter 20 and the torque speed sensor 22 under loading, the displacement when loaded can be calculated. Loading displacement / no-load displacement = volumetric efficiency, theoretical torque / loading torque = mechanical efficiency.
[0020] Low-speed stable pressure test: When the input speed is stable at 60rpm, load step by step from no-load pressure to the maximum stable pressure value, and maintain the pressure for 10s. The pressure value is within the specified range, and the pressure amplitude is less than 10% to pass.
[0021] Pressure-maintaining speed test: Test the pressure-maintaining ability of the pump 30 under test in a closed-loop pressure test and when the system has no flow output: switch the system pipeline to an independent pipeline, set the oil outlet pressure value to 4 pressure levels, and control the output pressure of the pump 30 under test by setting the speed of the servo motor 25 according to the feedback of the pressure sensor 21. Detect the speed change range of the servo motor 25 when the outlet pressure stabilizes to the set value. The speed range is qualified if it is within the specified range, and the speed fluctuation and pressure amplitude are less than the required value. This test requires the oil pressure sensor 21 signal to be connected to the control system of the servo motor 25. A pneumatic ball valve 26 and a relief valve 28 are installed at the outlet of the pump 30 under test to ensure no leakage and safety.
[0022] Speed ramp test: When the safety valve is set to reach the required pressure, the speed ramp test is performed from 2800r / min to 0r / min, and then back to 2800r / min. The ramp speed is 2800r / min / 45 seconds, and the total cycle time is 90 seconds. Observe the pressure curve, flow curve and torque curve during the speed change process. The torque speed sensor 22 has an accuracy of ±0.2%FS and a torque range of 250NM.
[0023] Test bench life cycle monitoring: The oil particle size detector 33, the filter 6 transmitter, and the liquid level and temperature sensor 34 are all connected to the hydraulic system life cycle monitoring module 32, which can monitor the operation of the hydraulic system very intuitively, such as oil cleanliness, filter blockage, liquid level, liquid temperature and other data, which can provide a very good test environment for the tested product and greatly extend the service life of the test bench.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A bidirectional pump test bench, characterized in that: A servo motor (25) connected to the pump (30) to be measured is provided, and a speed increasing machine (27) is provided between the servo motor (25) and the pump (30) to be measured.
2. A bidirectional pump test bench according to claim 1, characterized in that: The rotation speed of the servo motor (25) is 0-2000 r / min.
3. A bidirectional pump test bench according to claim 2, characterized in that: The speed ratio of the speed increaser (27) is 3.5:
1.
4. A bidirectional pump test bench according to claim 1, characterized in that: An oil replenishment pump (2) is provided for replenishing oil for the pump (30) being tested.
5. A bidirectional pump test bench according to claim 1, characterized in that: A hydraulic oil tank (23) is provided, and a cooling circulation pump (8) is provided in conjunction with the hydraulic oil tank (23).