Six-station oil pump durability test bench

Abstract

The utility model is applied to the technical field of oil pump durability test, and discloses a six-station oil pump durability test bench, which comprises an equipment rack, a test bench, a test bench and a test bench, and is characterized in that the equipment rack adopts a box type layout and is integrally made of a steel material subjected to plastic spraying treatment; the fluid mechanical system is composed of a constant-temperature oil storage tank, a filter, a tested oil pump, a safety valve and a circulation and station testing pipeline. According to the six-station oil pump durability test bench, the industrial personal computer is matched with the PLC program controller to provide automatic operation control of the whole set of system, and parameters and real-time parameters are set, displayed and recorded on a human-computer interface, so that the functions of dynamic display of the real-time operation state of the system, qualification judgment of test data, protection and alarm of equipment and the like are achieved; related information can be conveniently set and read, meanwhile, in an automatic testing mode, related parameters can be automatically adjusted according to a plurality of preset working condition points, testing is completed, and the influence of the working condition of the oil pump on the testing environment is reduced to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of oil pump durability performance testing technology, specifically a six-station oil pump durability performance testing bench. Background Technology

[0002] The oil pump is a crucial component of the oil supply system, and its durability directly impacts the reliability and performance of the entire system. Therefore, durability testing is essential to ensure the quality and performance of the oil pump. Oil pump durability testing standards primarily include testing environment, testing methods, and testing indicators. The testing environment should possess excellent control and monitoring capabilities. Generally, testing should be conducted under actual usage conditions, or it can be performed in a laboratory simulating the actual usage environment. The testing environment should meet relevant standards and requirements, including indicators such as temperature, humidity, pressure, and flow rate. Oil pump durability testing methods mainly include static testing, dynamic testing, and simulation testing. Static testing primarily targets the static performance of the oil pump, dynamic testing targets the performance under operating conditions, and simulation testing targets the durability performance of the oil pump under actual usage conditions. Testing methods should meet relevant standards and requirements to ensure accurate and reliable test results. Oil pump durability testing indicators mainly include performance indicators, reliability indicators, and safety indicators. Performance indicators include... The maximum flow rate, maximum head, and maximum pressure of an oil pump are important indicators. Reliability indicators include failure rate and lifespan, while safety indicators include reliability, durability, and safety. The selection of test indicators should be determined based on actual conditions and requirements. Currently, commonly used oil pump testing standards in the industry mainly include ISO 12176, GB / T 10581, and SAE J905. ISO 12176 is mainly applicable to electric fuel pumps in fuel systems, GB / T 10581 is mainly applicable to geometric oil pumps in automotive fuel supply systems, and SAE J905 is mainly applicable to mechanical pumps in automobiles, trucks, and tractors. These standards play an important role in ensuring the quality and performance of oil pumps. Testing standards are a key link in ensuring the quality and performance of oil pumps. During measurement, in order to ensure the uniformity of other relative conditions, it is necessary to strictly control the ambient temperature, humidity, and oil temperature. However, due to human error and the instability of oil pumps after long-term operation, external conditions can easily change drastically, which is not conducive to ensuring the rigor and accuracy of oil pump testing results. Utility Model Content

[0003] The purpose of this invention is to provide a six-station oil pump durability performance test bench to solve the problem mentioned in the background art that the test conditions are greatly affected by the oil pump operating conditions and are difficult to control stably.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a six-position oil pump durability performance test bench, comprising:

[0005] The equipment includes a frame, a fluid machinery system, a constant temperature and humidity chamber, and an automatic control system. The frame adopts a box-type layout and is made of steel material with powder coating. The upper part of the frame is equipped with a constant temperature chamber, a measuring section device, and control valves. The measuring section device is equipped with a stainless steel liquid collection tank, a pump installation position, and a constant temperature liquid tank for the medium. The lower part of the frame is equipped with a fluid machinery device, a constant temperature device, and an independent electrical control box.

[0006] The fluid machinery system consists of a constant temperature oil storage tank, a filter, a tested oil pump, a safety valve, and circulation and station test pipelines;

[0007] The constant temperature and humidity environment chamber consists of an outer shell and a constant temperature device.

[0008] By adopting the above technical solution, the constant temperature environment chamber, measuring section device and control valve are adaptively adjusted for different test items to meet the test requirements of different items.

[0009] Preferably, the constant temperature oil storage tank is equipped with an automatic refueling and unloading interface, and the shell of the constant temperature oil storage tank is made of transparent material. The unloading interface of the constant temperature oil storage tank is located at the bottom of the constant temperature oil storage tank, and a circulation pump is installed inside the constant temperature oil storage tank.

[0010] By adopting the above technical solution, automatic refueling and unloading of oil in the constant temperature oil storage tank can be achieved through the setting of automatic refueling and unloading interfaces. In conjunction with the transparent material of the constant temperature oil storage tank shell, it is convenient to observe the liquid level inside the constant temperature oil storage tank.

[0011] Preferably, the circulation and station test pipelines are made of stainless steel and copper pipes, and the surfaces of the circulation and station test pipelines are covered with heat insulation material to prevent burns and frostbite.

[0012] By adopting the above technical solution, it is possible to prevent workers from being injured due to accidental contact with the stainless steel and copper pipes used for testing during the operation.

[0013] Preferably, the medium temperature control module includes a stainless steel heater, a refrigeration unit, a PID instrument, and an SCR power adjustment module to precisely control the internal temperature of the constant temperature oil storage tank.

[0014] Using the above technical solution, the medium setting temperature and the ambient temperature inside the constant temperature oil storage tank can be set independently, and the maximum temperature difference between the two temperature setting values ​​during low temperature testing does not exceed 30℃.

[0015] Preferably, the pressure and differential pressure control module includes an oil inlet, an oil outlet, a pressure sensor, and a back pressure regulating valve, which adjusts the pumping pressure and flow rate of the oil pump by adjusting the opening size of the back pressure regulating valve.

[0016] By adopting the above technical solution, the pressure of the oil inlet and oil outlet is monitored by the pressure sensor, providing a data basis for adjusting the opening size of the back pressure regulating valve.

[0017] Preferably, the speed control module includes a DC power supply and an oil pump controller, and the oil pump controller has a reserved communication interface.

[0018] With the above technical solution, the oil pump controller has a reserved communication interface, which can be used to communicate with the controller of the oil pump under test and to operate and control the operating speed of the oil pump under test.

[0019] Preferably, the outer shell of the constant temperature and humidity environment chamber is made of a stainless steel inner liner and a double-layer composite insulation layer.

[0020] By adopting the above technical solution, the ambient temperature inside the constant temperature and humidity chamber can be within ±2℃, the humidity inside the constant temperature and humidity chamber can be within ±5%RH, the ambient temperature inside the constant temperature and humidity chamber can be set independently, and the maximum temperature difference between the test chamber and the medium setting temperature does not exceed 30℃.

[0021] Preferably, the constant temperature device includes a dual-compressor cascade refrigeration unit, a stainless steel heater, a fresh air inlet heat balance, a humidification device, a dehumidification device, a PID instrument, and an SCR power adjustment module to achieve precise control of the internal temperature of the constant temperature and humidity environment chamber.

[0022] The above technical solution ensures the stability of the test environment temperature.

[0023] Preferably, the constant temperature and humidity environment chamber is equipped with oil pipes in a 6-station parallel configuration, and each station oil pipe outlet is equipped with a flow meter, and the return liquid pipe at the outlet of each station flow meter adopts a collection and return liquid design.

[0024] The above technical solution ensures the stability of the reflux liquid.

[0025] Compared with the prior art, the beneficial effects of this utility model are: the six-station oil pump durability test bench:

[0026] 1. The entire system is automatically controlled by an industrial computer and a PLC programmable controller. Parameters are set, displayed, and recorded on the human-machine interface, enabling dynamic display of the system's real-time operating status, judgment of test data compliance, and protection and alarm functions for the equipment. It allows for easy setting and reading of relevant information. In automatic test mode, it can automatically adjust relevant parameters according to multiple preset operating points to complete the test, minimizing the impact of the oil pump's operating conditions on the test environment. Attached Figure Description

[0027] Figure 1This is a schematic diagram of the single-station equipment system of this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1 This utility model provides a technical solution: a six-position oil pump durability performance test bench, comprising:

[0030] Equipment frame: It adopts a box-type layout. The entire frame is made of steel material that has been powder coated. The worktable of the equipment frame is arranged at a height of more than 850mm to facilitate operation by the staff.

[0031] Fluid machinery system: consists of a constant temperature oil storage tank, filter, oil pump under test, safety valve, circulation and station test pipeline;

[0032] Temperature and humidity chamber: consists of an outer shell and a temperature control device;

[0033] Automatic control system: consists of a medium temperature control module, a pressure and differential pressure control module, a speed control module, an industrial computer, and a PLC programmable controller;

[0034] The following are the technical conditions for testing on the test bench:

[0035] The test cutoff point in the constant temperature oil storage tank is for oil with a viscosity of less than 10,000 cst.

[0036] The test environment temperature control range is -40~150℃±2℃;

[0037] The temperature rise / fall rate of the constant temperature environment chamber is ≥10℃ / Min;

[0038] The humidity control range for the test environment is not less than 10% to 98% ± 2RH;

[0039] Test medium temperature control range: -40~160℃±2℃;

[0040] The average rate of heating and cooling of the medium is ≥5℃ / Min;

[0041] Test medium flow range: ≤60L / min, accuracy not less than 1%, one flow meter is set for each station;

[0042] Rated voltage / operating voltage range: can cover the product requirements of DC12 / 24V, that is, the operating voltage range is DC9V-40V, and the power supply voltage accuracy is not less than 0.2%;

[0043] Rated current: ≤120A, configured with 6 channels each of 20A or a single channel of 120A, the accuracy of the power supply current is not less than 0.2%;

[0044] Inlet pressure sensor: measuring range: -100~200kPa, accuracy 0.5%;

[0045] Outlet pressure sensor: measuring range: 0~10 bar, accuracy 0.15%;

[0046] Outlet pressure sensor: measuring range: 0~100 bar, accuracy 0.15%.

[0047] The upper part of the equipment frame is equipped with a constant temperature environment chamber, a measuring section device and control valves. The measuring section device is equipped with a stainless steel liquid collection tank, a test oil pump installation position and a medium constant temperature liquid tank. The lower part of the equipment frame is equipped with a fluid machinery device, a constant temperature device and an independent electrical control box.

[0048] The constant temperature oil storage tank is equipped with an automatic refueling and unloading interface, and the shell of the constant temperature oil storage tank is made of transparent material. The unloading interface of the constant temperature oil storage tank is located at the bottom of the constant temperature oil storage tank, and a circulation pump is installed inside the constant temperature oil storage tank.

[0049] The circulation and station test pipelines are all made of stainless steel and copper pipes, and the surfaces of the circulation and station test pipelines are all covered with heat insulation material to prevent burns and frostbite.

[0050] The medium temperature control module includes a stainless steel heater, a refrigeration unit, a PID instrument, and an SCR power adjustment module, which precisely controls the internal temperature of the constant temperature oil storage tank. The constant temperature oil storage tank has a volume of 10L, while the effective volume of the transmission pipeline is 50L.

[0051] The pressure and differential pressure control module includes an oil inlet, an oil outlet, a pressure sensor, and a back pressure regulating valve. The pumping pressure and flow rate of the oil pump are adjusted by the opening size of the back pressure regulating valve.

[0052] The speed control module includes a DC power supply and an oil pump controller, and the oil pump controller has a reserved communication interface.

[0053] The outer shell of the constant temperature and humidity environment chamber is made of stainless steel inner liner and double-layer composite insulation layer.

[0054] The constant temperature device includes a dual-compressor cascade refrigeration unit, a stainless steel heater, a fresh air inlet heat balance, a humidification device, a dehumidification device, a PID instrument, and an SCR power adjustment module to achieve precise control of the internal temperature of the constant temperature and humidity chamber.

[0055] The constant temperature and humidity environment chamber uses a 6-station parallel oil pipe configuration, and each station's oil pipe outlet is equipped with a flow meter. The return pipe at the outlet of each station's flow meter adopts a collection and return design.

[0056] The automatic control system mainly controls the operation of the constant temperature and humidity environment chamber, the tested oil pump, and other devices, as well as the start-up, program operation, and parameter adjustment of the test process. The automatic control system has protection and alarm functions, including: high pressure protection, low pressure protection, overcurrent protection, overheat protection, oil shortage protection, oil overflow protection, over-temperature alarm, phase loss alarm, and fault alarm.

[0057] If any non-compliance or abnormal phenomenon occurs during the test, the system will issue an alarm or automatically stop. When an alarm is issued, personnel can intervene and perform the "continue testing" or "stop testing" operation.

[0058] Preparation before testing:

[0059] Under normal operating conditions, record parameters such as pump voltage, current consumption, flow rate, medium temperature, medium density, inlet and outlet pressure, input power, output power, and efficiency.

[0060] Flow & differential pressure curves – By changing the opening of the proportional valve at a certain speed, the differential pressure values ​​at different flow rates are measured to obtain a set of QH curves;

[0061] Efficiency & Flow Rate Curve – At a certain speed, each (Q, H) point corresponds to a power. The efficiency at that power point is calculated using a formula to obtain an efficiency & flow rate curve.

[0062] The curves include current and power curves in addition to flow rate and efficiency curves.

[0063] Monitoring parameters

[0064] Rotational speed: The rotational speed of the electronic oil pump is measured and recorded (pump feedback signal);

[0065] Flow rate, voltage, current, pressure (pump outlet oil pressure and inlet pressure), temperature (medium temperature, ambient temperature).

[0066] The test items include: high and low temperature storage, damp heat cycling, cold start, low temperature operation, high temperature durability and pump accelerated wear;

[0067] The test conditions for high-temperature and low-temperature storage projects are: room temperature and relative humidity of 45% to 75%;

[0068] The test methods for high-temperature and low-temperature storage projects are as follows:

[0069] 1) The pump is not filling with oil and is not connected to the power supply;

[0070] 2) Cool the temperature chamber to -50℃±3℃ and maintain for 12 hours, then raise the temperature to 90℃±3℃ and maintain for 12 hours;

[0071] 3) Repeat step 2 twice;

[0072] 4) Recover at room temperature and pressure for 2 hours.

[0073] Criteria for determining high-temperature and low-temperature storage items:

[0074] After testing, a visual inspection revealed no obvious damage that could affect pump function or seals, and the performance must meet the requirements.

[0075] The test conditions for the damp heat cycle project were: room temperature and relative humidity of 45% to 75%.

[0076] The test method for the damp heat cycle project is as follows:

[0077] 1) Perform according to the specified standards;

[0078] 2) Operating status: The pump is installed in the test fixture, filled with oil, and the electrical plug and wiring harness are connected to the pump. There is power supply, but the pump is in a dormant state for 40 minutes. The pump is powered and runs at the rated operating point for 10 minutes, alternating between the two.

[0079] 3) Cycle 10 times, with the first 5 cycles using low temperature and the last 5 cycles without low temperature, set the speed to 100%.

[0080] Criteria for judging damp heat cycle projects:

[0081] After testing, the pump operated normally without any abnormal noise.

[0082] The test conditions for the cold start project are: room temperature and relative humidity of 45% to 75%;

[0083] The cold start project testing method is as follows:

[0084] 1) Fill the pump with oil and connect the power supply;

[0085] 2) Set oil temperature to -40℃, ambient temperature to -40℃, and maintain this temperature for 8 hours;

[0086] 3) Test voltage 9V, test until pump starts and flow stabilizes.

[0087] Criteria for determining cold start projects:

[0088] The pump start-up and flow stabilization time must be within 30 seconds. The flow rate is allowed to deviate from the rated flow rate (1 L / min) by ±10%.

[0089] The test conditions for the low-temperature operation project are: room temperature and relative humidity of 45% to 75%;

[0090] The testing method for low-temperature operation projects is as follows:

[0091] 1) Fill the pump with oil and connect the power supply;

[0092] 2) Operational State 1: The pump is installed in the test fixture, filled with oil, and the electrical plug and wiring harness are connected to the pump. There is power supply, but the pump is in a dormant state. The temperature chamber is cooled to -40℃ for 12 hours. Operational State 2: The pump is powered and operates at the rated operating point with a pump voltage of 9V for 12 hours. Operational State 1: 12 hours. Operational State 2: Pump voltage 16V, lasting for a total of 48 hours.

[0093] Criteria for judging low-temperature operation projects:

[0094] After testing, the pump operated normally without any abnormal noise.

[0095] The high-temperature durability test conditions are: room temperature and relative humidity of 45% to 75%;

[0096] The test method for high-temperature durability is as follows:

[0097] 1) Fill the pump with oil and connect the power supply;

[0098] 2) Set the oil temperature to (120±2)℃, ambient temperature to (85±2)℃, and humidity to 95%RH;

[0099] 3) Set to the calibration conditions (e.g., maximum speed, flow rate 15L / min), and test for a total of 2000 hours.

[0100] High-temperature durability test criteria:

[0101] After testing, the pump operated normally without any abnormal noise.

[0102] The test conditions for the pump accelerated wear test are: room temperature and relative humidity of 45% to 75%;

[0103] The test method for accelerated pump wear is as follows:

[0104] 1) Fill the pump with oil and connect the power supply;

[0105] 2) Set the oil temperature to (90±2)℃, the ambient temperature to (23±5)℃, and the maximum speed;

[0106] 3) The pump stops for 1 second and runs for 15 seconds;

[0107] 4) Repeat step 3) 143 times, with the pump running for 17 seconds after the oil supply is stopped;

[0108] 5) Repeat step 4) 1300 times, for a total test time of 2241 hours.

[0109] 6) Retest the oil pump performance at 50% and 100% of the durability process. Performance test rated operating point: 14L / min@100℃±5℃@150kPa.

[0110] Criteria for judging pump accelerated wear:

[0111] After testing, the pump's start-up and flow stabilization time must be within 30 seconds. The flow rate is allowed to deviate from the rated flow rate (1 L / min) by ±10%.

[0112] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A six-position oil pump durability performance test bench, characterized in that, include: The equipment includes a frame, a fluid machinery system, a constant temperature and humidity chamber, and an automatic control system. The frame adopts a box-type layout and is made of steel material with powder coating. The upper part of the frame is equipped with a constant temperature chamber, a measuring section device, and control valves. The measuring section device is equipped with a stainless steel liquid collection tank, a pump installation position, and a constant temperature liquid tank for the medium. The lower part of the frame is equipped with a fluid machinery device, a constant temperature device, and an independent electrical control box. The fluid machinery system consists of a constant temperature oil storage tank, a filter, a tested oil pump, a safety valve, and circulation and station test pipelines; The constant temperature and humidity environment chamber consists of an outer shell and a constant temperature device.

2. The six-station oil pump durability test bench according to claim 1, characterized in that: The constant temperature oil storage tank is equipped with an automatic refueling and unloading interface, and the shell of the constant temperature oil storage tank is made of transparent material. The unloading interface of the constant temperature oil storage tank is located at the bottom of the constant temperature oil storage tank, and a circulation pump is installed inside the constant temperature oil storage tank.

3. The six-station oil pump durability test bench according to claim 1, characterized in that: The circulation and station test pipelines are all made of stainless steel and copper pipes, and the surfaces of the circulation and station test pipelines are all covered with heat insulation material to prevent burns and frostbite.

4. The six-station oil pump durability test bench according to claim 1, characterized in that: The medium temperature control module includes a stainless steel heater, a refrigeration unit, a PID instrument, and an SCR power adjustment module, which precisely controls the internal temperature of the constant temperature oil storage tank.

5. The six-station oil pump durability test bench according to claim 1, characterized in that: The outer shell of the constant temperature and humidity environment chamber is made of stainless steel inner liner and double-layer composite insulation layer.

6. The six-station oil pump durability test bench according to claim 1, characterized in that: The constant temperature device includes a dual-compressor cascade refrigeration unit, a stainless steel heater, a fresh air inlet heat balance, a humidification device, a dehumidification device, a PID instrument, and an SCR power adjustment module to achieve precise control of the internal temperature of the constant temperature and humidity chamber.

7. The six-station oil pump durability test bench according to claim 1, characterized in that: The constant temperature and humidity environment chamber uses a 6-station parallel oil pipe configuration, and each station's oil pipe outlet is equipped with a flow meter. The return pipe at the outlet of each station's flow meter adopts a collection and return design.

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