A lubricating oil sliding friction test bench

Abstract

The present invention relates to the technical field of lubricating oil performance testing, and particularly relates to a sliding friction test bench for lubricating oil, which includes a loading device, a fixed friction pair, and a sliding friction pair. A driving device is drivingly connected to the sliding friction pair, and a lubricating oil supply system and a temperature control system are connected to the fixed friction pair. The loading device, the driving device, the lubricating oil supply system, and the temperature control system are electrically connected to a control system, and the control system is electrically connected to a detection device. The detection device is used to detect the pressure changes between the loading device and the fixed friction pair and between the sliding friction pair and the driving device. This application can accurately simulate the actual working state of lubricating oil under different pressure, speed, and temperature conditions, making the test results more in line with actual applications and improving the accuracy of the evaluation of lubricating oil performance. Operators can conveniently set various test parameters on the control system, monitor the test process, realizing the automation and intelligence of the test operation and improving the test efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oil performance testing, in particular to a lubricating oil sliding friction test bench. Background Art

[0002] With the continuous development of industrial technology, mechanical equipment has higher and higher requirements for the performance of lubricants. Accurate evaluation of sliding friction performance can help R&D personnel promote the innovation of lubricant technology and develop new lubricant products with higher performance, more environmental protection and more energy saving. Therefore, accurate evaluation of the sliding friction performance of lubricants is crucial in the research and development, production and quality inspection of lubricants.

[0003] The existing test bench has a low degree of automation. When testing lubricants during the research and development and production of lubricants, frequent manual operations are required, whether it is adjusting the pressure of the loading system or adding and controlling the flow of lubricants. This not only leads to low test efficiency and consumes a lot of manpower and time costs, but also the human factor has a great impact on the test results. The operating habits and proficiency of different operators may lead to different results for the same test, which is not conducive to ensuring the accuracy and reliability of the test data.

[0004] Therefore, how to solve the problem of low automation level of existing test benches, realize automatic control and precise adjustment of the test process, and improve test efficiency and data accuracy is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0005] In order to solve the problem of low automation of existing test benches, realize automatic control and precise adjustment of the test process, and improve test efficiency and data accuracy, the present application provides a lubricating oil sliding friction test bench.

[0006] The lubricating oil sliding friction test bench provided in this application adopts the following technical solution:

[0007] A lubricating oil sliding friction test bench comprises a cabinet, a platform is fixedly connected to the top of the cabinet, a frame is fixedly installed on the platform, a loading device is fixedly installed on the frame, a fixed friction pair is installed between the loading device and the platform, a sliding friction pair is slidably connected to the fixed friction pair, a driving device is transmission-connected to the sliding friction pair, a lubricating oil supply system and a temperature control system are connected to the fixed friction pair, a control system electrically connected to the loading device, the driving device, the lubricating oil supply system and the temperature control system is installed inside the cabinet, the control system is electrically connected to a detection device, and the detection device is used to detect pressure changes between the loading device and the fixed friction pair and between the sliding friction pair and the driving device.

[0008] By adopting the above technical solutions, through the coordinated operation of the loading device, driving device, lubricating oil supply system and temperature control system, the actual working state of lubricating oil under different pressure, speed and temperature conditions can be accurately simulated, making the test results more in line with actual applications and improving the accuracy of the performance evaluation of lubricating oil. At the same time, by using the control system to centrally control each device and system, the operator can conveniently set various test parameters on the control system, monitor the test process, realize the automation and intelligence of the test operation, improve the test efficiency, and reduce the influence of human factors on the test results.

[0009] Further, the loading device includes a mounting plate fixedly installed on the frame, a telescopic member fixedly installed on the mounting plate, the detection device includes a first pressure sensor, one end of the first pressure sensor is fixedly connected to the telescopic end of the telescopic member, and the end of the first pressure sensor away from the telescopic member is fixedly connected to the fixed friction pair; both the telescopic member and the first pressure sensor are electrically connected to the control system.

[0010] By adopting the above technical solutions, the telescopic member can accurately control the force applied to the fixed friction pair, and can flexibly adjust the magnitude of the loading force according to different test requirements, so as to accurately simulate the loads borne by lubricating oil under various actual working conditions, improving the accuracy and reliability of the test results. Moreover, the setting of the first pressure sensor enables the pressure changes during the test process to be monitored in real time. The control system can then make timely adjustments based on the pressure feedback, ensuring the stability of the pressure during the test process, avoiding interference with the test results caused by pressure fluctuations, and further improving the test accuracy.

[0011] Further, the fixed friction pair includes a first fixed seat fixedly installed on the platform, a second fixed seat symmetrically arranged with the first fixed seat is fixedly connected to the loading device, mounting grooves are respectively formed at one ends of the first fixed seat and the second fixed seat close to each other, mounting boxes are respectively installed inside the mounting grooves, mounting cavities are respectively formed at one ends of the two mounting boxes close to each other, fixed friction blocks are hermetically and slidably connected inside the mounting cavities, and the sliding friction pair is simultaneously slidably connected to the two fixed friction blocks.

[0012] By adopting the above technical solutions, by using two symmetrically arranged fixed seats and fixed friction blocks, it is not only possible to better simulate the common working conditions of bilateral friction or multi-faceted friction in practice, making the test results closer to the actual application scenarios, improving the accuracy of the evaluation of the lubricating oil performance, but also enabling the entire fixed friction pair to have good stability during the loading and sliding processes, ensuring the reliability and repeatability of the test. And the fixed friction blocks are installed in the installation cavity, and the installation box is hermetically slidably connected in the installation groove. This design facilitates the replacement of fixed friction blocks of different materials, shapes or specifications to meet different test requirements, enhancing the versatility and flexibility of the test bench.

[0013] Furthermore, a number of rows of through holes arranged in parallel are formed on the fixed friction blocks, an oil supply channel is formed in the installation box corresponding to each row of the through holes, an oil supply pipe communicated with the oil supply channel is fixedly connected to the installation box, the oil supply pipe is hermetically slidably connected in the through holes, a pressure application hole communicating with the oil supply channel is formed on the installation box between every two of the oil supply pipes, oil delivery channels corresponding to the oil supply channels are formed on both the first fixed seat and the second fixed seat, the oil delivery channels are hermetically and correspondingly communicated with the oil supply channels, oil delivery tanks communicated with the oil delivery channels are fixedly and hermetically connected to the first fixed seat and the second fixed seat, the oil delivery tanks are hermetically communicated with the oil outlet end of the lubricating oil supply system, valve holes penetrating through the oil delivery channels are formed on both the first fixed seat and the second fixed seat, a valve core is hermetically slidably connected inside the valve holes, a spring is installed at one end of the valve core away from the sliding friction pair, and the spring is used to push the valve core to block the oil delivery channel. The valve core is made of a magnetic material, and a magnetic strip corresponding to the valve core is fixedly installed on the sliding friction pair along its sliding direction.

[0014] By adopting the above technical solutions, by using the cooperation of the magnetic strip and the magnetic valve core, the supply timing of the lubricating oil can be accurately controlled according to the position of the sliding friction pair. The lubricating oil is provided at specific positions and moments where lubrication is required, avoiding waste of the lubricating oil, and at the same time ensuring that there is always an appropriate amount of lubricating oil on the friction surface during the sliding process, improving the lubrication effect. The design of a number of rows of through holes arranged in parallel, oil supply channels, oil supply holes and pressure application holes enables the lubricating oil to be evenly distributed on the surface of the fixed friction blocks, thereby forming a uniform lubricating film between the sliding friction pair and the fixed friction blocks, more accurately simulating the function of the lubricating oil under actual working conditions, and improving the accuracy and reliability of the test results.

[0015] Furthermore, an oil return groove is formed on the first fixed seat around the installation groove, an oil return hole communicating with the oil return groove is formed on the first fixed seat, and the oil return hole is hermetically communicated with the oil return end of the lubricating oil supply system.

[0016] By adopting the above technical solution, the oil return groove and the oil return hole are used to recover and recycle the lubricating oil, thereby avoiding the waste of lubricating oil and reducing the test cost. In the long-term test process, the consumption of lubricating oil can be significantly reduced and the resource utilization rate can be improved.

[0017] Furthermore, the sliding friction pair includes a sliding seat, a mounting through hole is opened on the sliding seat corresponding to the fixed friction pair, a sliding friction block is installed inside the mounting through hole, a clamping seat is fixedly installed on the outer side of the sliding seat corresponding to the driving device, a clamping block is slidably installed inside the clamping seat, and the detection device includes a second pressure sensor, the second pressure sensor is fixedly connected to the clamping block, and one end of the second pressure sensor away from the clamping block is fixedly connected to the driving device; the second pressure sensor is electrically connected to the control system.

[0018] By adopting the above technical solution, the second pressure sensor is used to directly measure the pressure between the drive device and the sliding friction pair, which can accurately reflect the magnitude of the friction force during the sliding process, provide key data support for evaluating the friction reduction performance of the lubricant, and improve the accuracy and reliability of the test data. Through long-term monitoring and analysis of pressure data, potential problems in the operation of the equipment, such as wear of the drive device and jamming of sliding parts, can be discovered in advance, providing a basis for the maintenance and maintenance of the equipment, extending the service life of the equipment and reducing maintenance costs.

[0019] Furthermore, the driving device includes a driving motor, a slide rail is fixedly installed on the platform, fixed blocks are fixedly connected at both ends of the slide rail, a sliding block is slidably connected to the slide rail, a driving shaft that passes through the sliding block is rotatably connected between the two fixed blocks, the driving shaft is transmission-connected to the driving motor, two driving grooves symmetrically arranged in a spiral shape are provided on the driving shaft, a driving shuttle is rotatably connected inside the sliding block, and the driving shuttle is slidably connected inside the driving groove; the driving motor is electrically connected to the control system.

[0020] By adopting the above technical solution, the drive slot symmetrically arranged in a spiral shape on the drive shaft is used so that when the drive shaft rotates, the drive shuttle can drive the sliding block to slide back and forth on the slide rail. This reciprocating sliding method is closer to the movement form of many mechanical equipment in actual working conditions, and can more realistically simulate the working conditions of lubricating oil in actual use, making the test results more valuable for reference. In addition, the slide rail and the fixed block provide stable support and guidance for the sliding of the sliding block, ensuring the stability of the sliding process. At the same time, the matching method of the drive shuttle and the drive slot makes the power transmission more stable, reduces vibration and noise during movement, and improves the service life and operation stability of the equipment.

[0021] Furthermore, the lubricating oil supply system includes an oil storage tank, in which a partition is fixedly connected in a sealed manner. On both sides of the partition, a test oil chamber and an oil return chamber are respectively formed. Inside the cabinet, a first delivery pump is fixedly connected. The output end of the first delivery pump is fixedly connected to a first oil delivery pipe, and the input end of the first delivery pump is fixedly connected to a second oil delivery pipe. The end of the first oil delivery pipe away from the first delivery pump is in sealed communication with the oil supply tank. The end of the second oil delivery pipe away from the first delivery pump is in communication with the test oil chamber in the oil storage tank. Inside the cabinet, an oil return pipe is fixedly connected. One end of the oil return pipe is in sealed communication with the oil return hole formed in the first fixing seat, and the other end of the oil return pipe is in sealed communication with the oil return chamber in the oil storage tank. A tank cover is hermetically and slidably connected to the second oil delivery pipe and the oil return pipe corresponding to the oil storage tank. The tank cover is hermetically connected to the oil storage tank. An air vent groove is formed at a position of the partition close to the top of the oil storage tank. The first delivery pump is electrically connected to the control system.

[0022] By adopting the above technical solution, the partition is used to separate the test oil chamber and the oil return chamber, effectively preventing contaminants such as impurities and metal debris in the recycled lubricating oil from mixing into the new lubricating oil, ensuring that the lubricating oil used in each test is pure, thereby guaranteeing the accuracy and reliability of the test results and avoiding test errors caused by lubricating oil contamination. At the same time, the design of the air vent groove keeps the air pressure between the test oil chamber and the oil return chamber consistent, preventing the smooth delivery or blocked return of the lubricating oil due to the air pressure difference, ensuring the smoothness of the lubricating oil during supply and recovery, and maintaining the stable operation of the entire lubricating oil supply system.

[0023] Further, the temperature control system includes a refrigeration box and a heating box. The interiors of the refrigeration box and the heating box are both filled with temperature control media. A refrigerator is fixedly and thermally connected to the refrigeration box, and a heater is fixedly and thermally connected to the heating box. A first electric control valve and a second electric control valve are respectively connected to the refrigeration box, and a third electric control valve and a fourth electric control valve are respectively connected to the heating box. A first three-way pipe is connected between the first electric control valve and the third electric control valve, and a second three-way pipe is connected between the second electric control valve and the fourth electric control valve. The other end of the first three-way pipe is connected to a second delivery pump. Heat exchange pipes are installed inside both the first fixing seat and the second fixing seat. The two heat exchange pipes are correspondingly and thermally connected to the fixed friction blocks. One ends of the two heat exchange pipes are connected to the output end of the second delivery pump in parallel, and the other ends of the two heat exchange pipes away from the second delivery pump are connected to the second three-way pipe in parallel. Temperature sensors are installed inside both the first fixing seat and the second fixing seat. The refrigerator, the heater, the first electric control valve, the second electric control valve, the third electric control valve, the fourth electric control valve, the second delivery pump, and the temperature sensors are all electrically connected to the control system.

[0024] By adopting the above technical solution, by using the temperature sensors to real-time feedback temperature data, the control system can accurately control the start and stop of the refrigerator and the heater and the opening and closing of each electric control valve according to the difference between the actual temperature and the preset temperature, realizing precise adjustment of the temperature of the fixed friction blocks, meeting the requirements of different tests for temperature conditions, and improving the accuracy and reliability of the test results. The refrigeration box and the heating box are respectively equipped with a refrigerator and a heater, which can quickly refrigerate or heat the temperature control media, and then quickly circulate and transport them through the second delivery pump, enabling the temperature of the fixed friction blocks to quickly reach and stabilize at the preset value, reducing the test waiting time and improving the test efficiency. It can also be conveniently switched between the refrigeration and heating modes according to the test requirements to adapt to different test conditions, such as simulating the performance of lubricating oil in different environments such as high temperature and low temperature, expanding the application range of the test bench.

[0025] Further, the control system includes an industrial computer and a programmable logic controller. The industrial computer is provided with a man-machine interaction interface for inputting test parameters. The loading device, the driving device, the detection device, the lubricating oil supply system, and the temperature control system are electrically connected to the industrial computer and the programmable logic controller. The programmable logic controller controls the loading device, the driving device, the lubricating oil supply system, and the temperature control system according to the instructions sent by the industrial computer.

[0026] By adopting the above technical solution, using the human-machine interface of the industrial computer, operators can conveniently input various test parameters without complex manual operations and settings, reducing the operation difficulty and improving the operation efficiency. At the same time, the human-machine interface can intuitively display various data and status information during the test process, facilitating operators to monitor the test progress in real time. Moreover, the entire test process is automatically controlled by the control system, reducing manual intervention and the impact of human factors on the test results. Meanwhile, the automatic control can achieve continuous operation of the test, improving the test efficiency, reducing the test time and labor costs. In addition, the software and hardware design of the control system has certain flexibility and scalability, and can conveniently adjust and modify the test parameters and control programs according to different test requirements and research directions. At the same time, the function and application scope of the test bench can also be expanded by adding or replacing detection devices and actuators.

[0027] The beneficial effects achieved:

[0028] By using the coordinated work of the loading device, driving device, lubricating oil supply system and temperature control system in this application, the actual working state of lubricating oil under different pressure, speed and temperature conditions can be accurately simulated, making the test results more in line with the actual application and improving the accuracy of the evaluation of the performance of lubricating oil.

[0029] By using the control system to centrally control each device and system in this application, operators can conveniently set various test parameters on the control system, monitor the test process, realizing the automation and intelligence of the test operation, improving the test efficiency and reducing the impact of human factors on the test results.

[0030] By using the cooperation of the magnetic strip and the magnetic valve core in this application, the supply timing of lubricating oil can be accurately controlled according to the position of the sliding friction pair. Lubricating oil is provided at specific positions and moments where lubrication is required, avoiding waste of lubricating oil, and at the same time ensuring that there is always an appropriate amount of lubricating oil on the friction surface during the sliding process, improving the lubrication effect. Brief Description of the Drawings

[0031] Figure 1 is the overall structural schematic diagram of an embodiment of this application.

[0032] Figure 2 is the structural decomposition schematic diagram of an embodiment of this application.

[0033] Figure 3 is the internal structural schematic diagram of an embodiment of this application.

[0034] Figure 4 is the structural decomposition schematic diagram of the loading device in an embodiment of this application.

[0035] Figure 5 It is a schematic structural decomposition diagram of a fixed friction pair and a sliding friction pair in an embodiment of the present application.

[0036] Figure 6 Is Figure 3 The enlarged schematic diagram of the structure of Part I in

[0037] Figure 7 It is a schematic structural decomposition diagram of a driving device in an embodiment of the present application.

[0038] Figure 8 Is Figure 7 The enlarged schematic diagram of the structure of Part II in

[0039] Figure 9 It is a schematic structural decomposition diagram of a lubricating oil supply system in an embodiment of the present application.

[0040] Figure 10 It is a schematic installation structure diagram of a temperature control system in an embodiment of the present application.

[0041] Explanation of reference numerals: 100, cabinet; 101, platform; 102, frame; 200, loading device; 201, mounting plate; 202, telescopic member; 300, fixed friction pair; 301, first fixed seat; 302, second fixed seat; 303, mounting groove; 304, mounting box; 305, mounting cavity; 306, fixed friction block; 307, through hole; 308, oil supply channel; 309, oil supply pipe; 310, pressure application hole; 311, oil delivery channel; 312, oil delivery tank; 313, valve hole; 314, valve core; 315, spring; 316, magnetic strip; 317, oil return groove; 318, oil return hole; 400, sliding friction pair; 401, sliding seat; 402, mounting through hole; 403, sliding friction block; 404, clamping seat; 405, clamping block; 500, driving device; 501, driving motor; 502, slide rail; 503, fixed block; 504, sliding block; 505, driving shaft; 506, driving groove; 507, driving shuttle; 508, driving wheel; 509, driven wheel; 510, transmission belt; 600, detection device; 601, first pressure sensor; 602, second pressure sensor; 700, lubricating oil supply system; 701, oil storage tank; 702, partition; 703, test oil chamber; 704, oil return chamber; 705, first delivery pump; 706, first delivery pipe; 707, second delivery pipe; 708, oil return pipe; 709, oil tank cap; 710, ventilation groove; 800, temperature control system; 801, refrigeration box; 802, heating box; 803, refrigerator; 804, heater; 805, first electric control valve; 806, second electric control valve; 807, third electric control valve; 808, fourth electric control valve; 809, first three-way pipe; 810, second three-way pipe; 811, second delivery pump; 812, heat exchange pipe; 813, first telescopic pipe. Specific Embodiments

[0042] The following further elaborates on this application in conjunction with the attached Figure 1-10 drawings for a more detailed description.

[0043] In the description of this application, it should be noted that the orientation or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0044] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] An embodiment of this application discloses a lubricating oil sliding friction test bench.

[0046] Please refer to Figures 1 to 10 , in an embodiment of this application, a lubricating oil sliding friction test bench includes a cabinet 100. A platform 101 is fixedly connected to the top of the cabinet 100. A frame 102 is fixedly installed on the platform 101. A loading device 200 is fixedly installed on the frame 102. A fixed friction pair 300 is installed between the loading device 200 and the platform 101. A sliding friction pair 400 is slidably connected to the fixed friction pair 300. A driving device 500 is drivingly connected to the sliding friction pair 400. A lubricating oil supply system 700 and a temperature control system 800 are connected to the fixed friction pair 300. A control system electrically connected to the loading device 200, the driving device 500, the lubricating oil supply system 700, and the temperature control system 800 is installed inside the cabinet 100. The control system is electrically connected to a detection device 600. The detection device 600 is used to detect the pressure changes between the loading device 200 and the fixed friction pair 300 and between the sliding friction pair 400 and the driving device 500.

[0047] The implementation principle of the lubricating oil sliding friction test bench in an embodiment of this application is as follows:

[0048] First, through the control system, the lubricating oil supply system 700 is controlled to continuously supply lubricating oil to the friction surfaces of the sliding friction pair 400 and the fixed friction pair 300 at a certain pressure, so as to achieve lubrication between the friction surfaces. At the same time, the loading device 200 is adjusted through the control system, so that the loading device 200 applies pressure to the fixed friction pair 300. By changing the pressure applied by the loading device 200 to the fixed friction pair 300, different load conditions can be simulated. During the test, the driving device 500 is controlled to start through the control system. The driving device 500 transmits power to the sliding friction pair 400, making it slide relative to the fixed friction pair 300 to simulate the sliding friction under actual working conditions. During the test, the temperature control system 800 can be used to adjust the temperature of the fixed friction pair 300, so as to simulate the working state of the lubricating oil under different temperature environments. The detection device 600 monitors the pressure changes between the loading device 200 and the fixed friction pair 300 and between the sliding friction pair 400 and the driving device 500 in real time, and transmits the data to the control system. The control system analyzes and processes the data, and the operator can evaluate the sliding friction performance of the lubricating oil based on these data.

[0049] Please refer to Figures 1 to 10 , in an embodiment of the present application, the loading device 200 includes a mounting plate 201 fixedly installed on the frame 102. A telescopic member 202 is fixedly installed on the mounting plate 201. The detection device 600 includes a first pressure sensor 601. One end of the first pressure sensor 601 is fixedly connected to the telescopic end of the telescopic member 202, and the end of the first pressure sensor 601 away from the telescopic member 202 is fixedly connected to the fixed friction pair 300; both the telescopic member 202 and the first pressure sensor 601 are electrically connected to the control system.

[0050] During the working process, the control system sends an instruction to the telescopic member 202 according to the preset test parameters. The telescopic member 202 is usually a component with a telescopic function such as a hydraulic cylinder or an electric push rod. After receiving the instruction, it starts to act, and its telescopic end generates a displacement, thereby applying a certain force to the fixed friction pair 300. This force simulates the load borne by the lubricating oil on the friction surface in actual working conditions. During the process of the telescopic member 202 applying force, the first pressure sensor 601 senses the pressure change between the telescopic member 202 and the fixed friction pair 300 in real time. The first pressure sensor 601 converts the sensed pressure signal into an electrical signal and transmits it to the control system. After the control system receives the pressure data transmitted by the first pressure sensor 601, it compares it with the preset pressure value. If there is a deviation between the actual pressure value and the preset value, the control system will timely adjust the control instruction for the telescopic member 202, so that the telescopic member 202 further extends or retracts, thereby adjusting the force applied to the fixed friction pair 300 to make the pressure reach and stabilize at the preset value to ensure that the test is carried out under precise pressure conditions.

[0051] Please refer to Figures 1 to 10 , in an embodiment of the present application, the fixed friction pair 300 includes a first fixed seat 301 fixedly installed on the platform 101. A second fixed seat 302 symmetrically arranged with the first fixed seat 301 is fixedly connected to the loading device 200. Installation grooves 303 are formed at one end of the first fixed seat 301 and the second fixed seat 302 close to each other. Installation boxes 304 are hermetically and slidably connected inside the installation grooves 303. Installation cavities 305 are formed at one end of the two installation boxes 304 close to each other. Fixed friction blocks 306 are hermetically and slidably connected inside the installation cavities 305. The sliding friction pair 400 is slidably connected to the two fixed friction blocks 306 at the same time.

[0052] During the working process, when the loading device 200 works, the force applied by the telescopic member 202 is transmitted to the second fixed seat 302 through the first pressure sensor 601, causing the second fixed seat 302 to approach the first fixed seat 301, so as to apply the force to the fixed friction block 306 in the installation cavity 305 of the installation box 304 installed on the second fixed seat 302. The pressure will be further applied to the fixed friction block 306 installed on the first fixed seat 301 through the sliding friction pair 400. In this way, the load borne by the friction pair in the actual working condition is simulated. The driving device 500 drives the sliding friction pair 400 to move. Since the sliding friction pair 400 is slidably connected to the two fixed friction blocks 306 at the same time, relative sliding occurs between the sliding friction pair 400 and the fixed friction block 306 during the sliding process, simulating the sliding friction environment of the lubricating oil in actual application.

[0053] Please refer to Figures 1 to 10, in an embodiment of the present application, a plurality of rows of through holes 307 arranged in parallel are formed on the fixed friction block 306. An oil supply channel 308 is formed inside the mounting box 304 corresponding to each row of through holes 307. An oil supply pipe 309 communicating with the oil supply channel 308 is fixedly connected to the mounting box 304. The oil supply pipe 309 is hermetically and slidably connected in the through hole 307. Pressure application holes 310 communicating with the oil supply channel 308 are formed on the mounting box 304 between every two oil supply pipes 309. Oil delivery channels 311 corresponding to the oil supply channel 308 are formed on both the first fixing seat 301 and the second fixing seat 302. The oil delivery channels 311 are hermetically and correspondingly communicated with the oil supply channel 308. Oil delivery tanks 312 communicating with the oil delivery channels 311 are fixedly and hermetically connected to the first fixing seat 301 and the second fixing seat 302. The oil delivery tanks 312 are hermetically communicated with the oil outlet end of the lubricating oil supply system 700. Valve holes 313 penetrating the oil delivery channels 311 are formed on both the first fixing seat 301 and the second fixing seat 302. A valve core 314 is hermetically and slidably connected inside the valve holes 313. A spring 315 is installed at one end of the valve core 314 away from the sliding friction pair 400. The spring 315 is used to push the valve core 314 to block the oil delivery channel 311. The valve core 314 is made of a magnetic material. A magnetic strip 316 corresponding to the valve core 314 is fixedly installed on the sliding friction pair 400 along its sliding direction.

[0054] During the working process, the lubricating oil supply system 700 transports the lubricating oil into the oil delivery tanks 312. The oil delivery tanks 312 are communicated with the oil delivery channels 311 on the first fixing seat 301 and the second fixing seat 302. In the initial state, the spring 315 pushes the valve core 314 to block the oil delivery channel 311, and the lubricating oil cannot enter the oil supply channel 308 temporarily.

[0055] When the driving device 500 drives the sliding friction pair 400 to slide, the magnetic strip 316 fixedly installed on the sliding friction pair 400 along the sliding direction moves accordingly. When the magnetic strip 316 moves to the position corresponding to the valve core 314, since the valve core 314 is made of a magnetic material, the magnetic strip 316 generates an attractive force on the valve core 314, overcoming the elastic force of the spring 315, so that the valve core 314 slides in the valve hole 313, thereby opening the oil delivery channel 311. At this time, the lubricating oil in the oil delivery tanks 312 flows into the oil supply channel 308 through the oil delivery channels 311.

[0056] Part of the lubricating oil flowing into the oil supply channel 308 enters the through holes 307 on the fixed friction block 306 through the oil supply pipe 309, and then seeps out to the contact surface between the fixed friction block 306 and the sliding friction pair 400 to play a lubricating role; the other part of the lubricating oil can apply pressure to the fixed friction block 306 through the pressure application holes 310. In this way, the pressure compensation for the loading device 200 is realized through the oil pressure of the lubricating oil, and the dynamic adjustment of the loading force is realized, which is beneficial to maintaining the stability and reliability of the loading force.

[0057] When the magnetic strip 316 continues to slide away from the corresponding position of the valve core 314 along with the sliding friction pair 400, the attraction of the magnetic strip 316 to the valve core 314 disappears, and the elastic force of the spring 315 pushes the valve core 314 to re-seal the oil supply channel 311, stopping the supply of lubricating oil to the oil supply channel 308.

[0058] Please refer to Figures 1 to 10 , in an embodiment of the present application, an oil return groove 317 is formed around the installation groove 303 on the first fixing seat 301, and an oil return hole 318 communicating with the oil return groove 317 is formed on the first fixing seat 301. The oil return hole 318 is hermetically connected to the oil return end of the lubricating oil supply system 700.

[0059] During the working process, the lubricating oil supply system 700 transports the lubricating oil to the through hole 307 of the fixed friction block 306 through structures such as the oil supply tank 312, the oil supply channel 311, and the oil supply channel 308, and then seeps out to the contact surface between the fixed friction block 306 and the sliding friction pair 400 to play a lubricating role. As the sliding friction pair 400 slides, part of the lubricating oil will overflow from the friction surface. The overflowed lubricating oil will flow into the oil return groove 317 formed around the installation groove 303 on the first fixing seat 301. Since the oil return groove 317 is hermetically connected to the oil return end of the lubricating oil supply system 700 through the oil return hole 318, the lubricating oil flowing into the oil return groove 317 will, under the action of gravity and the negative pressure generated by the lubricating oil supply system 700, flow back into the lubricating oil supply system 700 through the oil return hole 318, realizing the recycling of the lubricating oil.

[0060] Please refer to Figures 1 to 10 , in an embodiment of the present application, the sliding friction pair 400 includes a sliding seat 401. An installation through hole 402 corresponding to the fixed friction pair 300 is formed on the sliding seat 401. A sliding friction block 403 is installed inside the installation through hole 402. A clamping seat 404 is fixedly installed on the outside of the sliding seat 401 corresponding to the driving device 500. A clamping block 405 is slidably installed inside the clamping seat 404. The detection device 600 includes a second pressure sensor 602. The second pressure sensor 602 is fixedly connected to the clamping block 405. One end of the second pressure sensor 602 away from the clamping block 405 is fixedly connected to the driving device 500; the second pressure sensor 602 is electrically connected to the control system.

[0061] During the working process, the driving device 500 is started, and its power is transmitted to the clamping seat 404 through the clamping block 405 connected to the second pressure sensor 602, thereby driving the sliding seat 401 to move. The sliding friction block 403 installed on the sliding seat 401 slides relative to the fixed friction block 306 of the fixed friction pair 300, simulating the sliding friction process under actual working conditions.

[0062] During the sliding process, the interaction force between the driving device 500 and the sliding seat 401 is manifested as a tensile and compressive force, and the second pressure sensor 602 senses and measures the change of this tensile and compressive force in real time. The second pressure sensor 602 converts the force signal into an electrical signal and transmits it to the control system.

[0063] The control system receives the data transmitted by the second pressure sensor 602. By analyzing the pressure data, it understands the resistance situation when the driving device 500 drives the sliding friction pair 400, and then combines other data such as the pressure applied by the loading device 200 to comprehensively evaluate the friction reduction and anti-wear performance of the lubricating oil under different working conditions.

[0064] Please refer to Figures 1 to 10 , in an embodiment of the present application, the driving device 500 includes a driving motor 501. A slide rail 502 is fixedly installed on the platform 101. Both ends of the slide rail 502 are fixedly connected with fixed blocks 503. A sliding block 504 is slidably connected to the slide rail 502. A driving shaft 505 passing through the sliding block 504 is rotatably connected between the two fixed blocks 503. The driving shaft 505 is in transmission connection with the driving motor 501. Two driving grooves 506 symmetrically arranged in a spiral shape are formed on the driving shaft 505. A driving shuttle 507 is rotatably connected inside the sliding block 504, and the driving shuttle 507 is slidably connected inside the driving groove 506; the driving motor 501 is electrically connected to the control system.

[0065] During the working process, the control system sends an instruction to the driving motor 501. The driving motor 501 starts and begins to operate, converting electrical energy into mechanical energy. The driving motor 501 drives the driving shaft 505 connected to it in transmission to rotate. The symmetrically arranged driving grooves 506 on the driving shaft 505 will form a closed loop, and the driving shuttle 507 rotatably connected inside the sliding block 504 is slidably connected inside the closed-loop driving groove 506. When the driving shaft 505 rotates, the spiral shape of the driving groove 506 will cause the driving shuttle 507 to perform a reciprocating linear motion along the driving groove 506, thereby driving the sliding block 504 to perform a reciprocating linear slide on the slide rail 502. The sliding block 504 is connected to the clamping seat 404 of the sliding friction pair 400. The linear slide of the sliding block 504 will drive the sliding friction pair 400 to move together, so that the sliding friction block 403 on the sliding friction pair 400 performs a relative slide on the fixed friction block 306 of the fixed friction pair 300, thus simulating the sliding friction scenario when the lubricating oil actually works.

[0066] Please refer to Figures 1 to 10 , in an embodiment of the present application, a driving wheel 508 is fixedly installed on the output shaft of the driving motor 501. A driven wheel 509 is installed on the driving shaft 505 corresponding to the driving wheel 508. A transmission belt 510 is in transmission connection between the driving wheel 508 and the driven wheel 509.

[0067] During the working process, the control system sends a start command to the drive motor 501. The drive motor 501 starts to operate, and its output shaft drives the driving wheel 508 fixedly installed on it to rotate synchronously. At this time, the driving wheel 508 obtains the power output by the drive motor 501. When the driving wheel 508 rotates, it drives the transmission belt 510 to move through the friction force with the transmission belt 510. The transmission belt 510 contacts the driven wheel 509 and generates a friction force, so that the driven wheel 509 rotates together with the transmission belt 510. Since the driven wheel 509 is fixedly installed on the drive shaft 505, the rotation of the driven wheel 509 will drive the drive shaft 505 to rotate synchronously. When the transmission belt 510 transmits power between the driving wheel 508 and the driven wheel 509, it has a certain elasticity, which can buffer the vibration and impact generated during the start and operation of the drive motor 501, reduce the influence of vibration on other components of the test bench, ensure the stability of the test bench operation, and improve the accuracy of test data.

[0068] Please refer to Figures 1 to 10 , in an embodiment of the present application, the lubricating oil supply system 700 includes an oil storage tank 701. A partition plate 702 is fixedly connected in the oil storage tank 701 in a sealed manner. A test oil chamber 703 and an oil return chamber 704 are respectively formed on both sides of the partition plate 702. A first delivery pump 705 is fixedly connected inside the cabinet 100. The output end of the first delivery pump 705 is fixedly connected to a first oil delivery pipe 706. The input end of the first delivery pump 705 is fixedly connected to a second oil delivery pipe 707. One end of the first oil delivery pipe 706 away from the first delivery pump 705 is in sealed communication with the oil supply tank 312. One end of the second oil delivery pipe 707 away from the first delivery pump 705 is in communication with the test oil chamber 703 in the oil storage tank 701. An oil return pipe 708 is fixedly connected inside the cabinet 100. One end of the oil return pipe 708 is in sealed communication with the oil return hole 318 opened on the first fixing seat 301. The other end of the oil return pipe 708 is in sealed communication with the oil return chamber 704 in the oil storage tank 701. The oil tank cover 709 is hermetically slidably connected to the second oil delivery pipe 707 and the oil return pipe 708 corresponding to the oil storage tank 701. The oil tank cover 709 is hermetically connected to the oil storage tank 701. An air vent groove 710 is opened at a position of the partition plate 702 close to the top of the oil storage tank 701. The first delivery pump 705 is electrically connected to the control system.

[0069] During the working process, the control system sends a command to the first delivery pump 705, and the first delivery pump 705 starts. At this time, the first delivery pump 705 extracts lubricating oil from the test oil chamber 703 of the oil storage tank 701 through the second oil delivery pipe 707, and then transports the lubricating oil to the oil supply tank 312 through the first oil delivery pipe 706. The oil supply tank 312 then transports the lubricating oil to the contact surfaces of the fixed friction block 306 and the sliding friction block 403 through structures such as the oil supply channel 311 and the oil supply channel 308 in sequence to realize the lubrication of the test process.

[0070] During the test, the lubricating oil overflowing from the friction surface will flow into the oil return groove 317 of the first fixing seat 301, then enter the oil return pipe 708 through the oil return hole 318, and finally flow back to the oil return cavity 704 of the oil storage tank 701. Since the partition plate 702 is provided with a ventilation groove 710 near the top of the oil storage tank 701, the air pressures in the test oil cavity 703 and the oil return cavity 704 are kept balanced, ensuring that the lubricating oil can circulate smoothly in the system.

[0071] The partition plate 702 divides the oil storage tank 701 into a test oil cavity 703 and an oil return cavity 704, separating the recovered lubricating oil from the lubricating oil to be used, avoiding the contamination of the new oil by impurities and wear particles that may be contained in the recovered oil, and ensuring the purity of the test oil. At the same time, the oil tank cap 709 is hermetically connected to the oil storage tank 701 and seals and slides on the second oil delivery pipe 707 and the oil return pipe 708 to prevent the leakage of the lubricating oil and maintain the tightness of the system.

[0072] Please refer to Figures 1 to 10 , in an embodiment of the present application, the temperature control system 800 includes a refrigeration box 801 and a heating box 802. The interiors of the refrigeration box 801 and the heating box 802 are both filled with a temperature control medium. A refrigerator 803 is fixedly and thermally connected to the refrigeration box 801, and a heater 804 is fixedly and thermally connected to the heating box 802. A first electric control valve 805 and a second electric control valve 806 are respectively connected to the refrigeration box 801, and a third electric control valve 807 and a fourth electric control valve 808 are respectively connected to the heating box 802. A first three-way pipe 809 is connected between the first electric control valve 805 and the third electric control valve 807, and a second three-way pipe 810 is connected between the second electric control valve 806 and the fourth electric control valve 808. The other end of the first three-way pipe 809 is connected to a second delivery pump 811. Heat exchange pipes 812 are installed inside both the first fixing seat 301 and the second fixing seat 302. The two heat exchange pipes 812 are correspondingly and thermally connected to the fixed friction block 306. One ends of the two heat exchange pipes 812 are connected in parallel to the output end of the second delivery pump 811, and the ends of the two heat exchange pipes 812 far from the second delivery pump 811 are connected in parallel to the second three-way pipe 810. Both ends of the heat exchange pipe 812 installed inside the second fixing seat 302 are connected to the second three-way pipe 810 and the second delivery pump 811 through first telescopic pipes 813 connected by sealed sliding. Temperature sensors are installed inside both the first fixing seat 301 and the second fixing seat 302. The refrigerator 803, the heater 804, the first electric control valve 805, the second electric control valve 806, the third electric control valve 807, the fourth electric control valve 808, the second delivery pump 811, and the temperature sensor are all electrically connected to the control system.

[0073] During the working process, the temperature sensors inside the first fixing seat 301 and the second fixing seat 302 monitor the temperature near the fixed friction block 306 in real time and transmit the temperature data to the control system. The control system compares the received temperature data with the preset test temperature.

[0074] If the monitored temperature is higher than the preset temperature, the control system controls the cooler 803 to start and refrigerate the temperature control medium in the refrigeration box 801. At the same time, the first electric control valve 805 and the second electric control valve 806 are opened, and the third electric control valve 807 and the fourth electric control valve 808 are closed. The second delivery pump 811 works to draw out the refrigerated temperature control medium from the refrigeration box 801 and transport it through the first three-way pipe 809 to the heat exchange pipes 812 inside the first fixing seat 301 and the second fixing seat 302. The temperature control medium flows in the heat exchange pipes 812, exchanges heat with the fixed friction block 306, takes away the heat, and realizes temperature reduction. Then, the temperature control medium flows back to the refrigeration box 801 through the second three-way pipe 810 and the second electric control valve 806 to complete the cycle.

[0075] If the monitored temperature is lower than the preset temperature, the control system controls the heater 804 to start and heat the temperature control medium in the heating box 802. At the same time, the third electric control valve 807 and the fourth electric control valve 808 are opened, and the first electric control valve 805 and the second electric control valve 806 are closed. The second delivery pump 811 works to draw out the heated temperature control medium from the heating box 802 and transport it through the first three-way pipe 809 to the heat exchange pipes 812. The temperature control medium exchanges heat with the fixed friction block 306 in the heat exchange pipes 812, releases heat, and realizes temperature increase. Then, the temperature control medium flows back to the heating box 802 through the second three-way pipe 810 and the fourth electric control valve 808 to complete the cycle.

[0076] In a specific embodiment of the present application, the temperature control medium can adopt aqueous solutions (ethylene glycol aqueous solution, propylene glycol aqueous solution), heat-conducting oil, etc.; for example, silicone oil. Silicone oil is similar to other refrigeration media in the refrigeration system. It absorbs heat and evaporates in the evaporator and releases heat and condenses in the refrigeration box 801, and realizes the transfer of heat through phase change to achieve the refrigeration purpose. And by using the heater 804 to heat the silicone oil, due to the high boiling point and low volatility of the silicone oil, it can work stably at a higher temperature and transfer heat to the heat exchange pipes 812 through circulation.

[0077] Please refer to Figures 1 to 10In one embodiment of the present application, the control system includes an industrial computer and a programmable logic controller (PLC). The industrial computer is provided with a human-computer interaction interface for inputting test parameters. The loading device 200, the driving device 500, the detection device 600, the lubricating oil supply system 700, and the temperature control system 800 are electrically connected to the industrial computer and the programmable logic controller (PLC). The programmable logic controller (PLC) controls the loading device 200, the driving device 500, the lubricating oil supply system 700, and the temperature control system 800 according to the instructions sent by the industrial computer.

[0078] During the working process, the operator inputs various parameters required for the test through the human-machine interface of the industrial computer, such as the loading force, loading time and loading mode of the loading device 200; the driving speed, rotation direction and running time of the driving device 500; the oil supply amount, oil supply time and oil supply frequency of the lubricating oil supply system 700; the target temperature, temperature adjustment range and temperature control accuracy of the temperature control system 800, etc. The industrial computer processes and analyzes the test parameters input by the operator, generates corresponding control instructions, and sends these instructions to the programmable logic controller (PLC).

[0079] After receiving the instructions sent by the industrial computer, the programmable logic controller (PLC) accurately controls the loading device 200, the driving device 500, the lubricating oil supply system 700 and the temperature control system 800 according to the preset program logic. For example, the telescopic member 202 of the loading device 200 is controlled to load the fixed friction pair 300; the speed and direction of the driving motor 501 of the driving device 500 are controlled to drive the sliding friction pair 400 to move; the start and stop and flow rate of the first delivery pump 705 of the lubricating oil supply system 700 are controlled to ensure the supply of lubricating oil; the opening and closing of the refrigerator 803, the heater 804 and each electric control valve of the temperature control system 800 are controlled to adjust the test temperature.

[0080] The detection device 600 collects various data in real time during the test, such as the pressure between the loading device 200 and the fixed friction pair 300, the pressure between the sliding friction pair 400 and the driving device 500, the temperature detected by the temperature sensor, etc., and transmits these data to the industrial computer and the programmable logic controller (PLC). The industrial computer analyzes and processes the collected data and compares it with the preset parameters. If the data is found to be abnormal or deviates from the preset value, the industrial computer will generate a new control instruction and send it to the programmable logic controller (PLC) to adjust the corresponding equipment to ensure that the test is carried out within the predetermined parameter range.

[0081] The above are all preferred embodiments of this application, and do not limit the protection scope of this application. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A lubricating oil sliding friction test bench, characterized in that: The invention comprises a cabinet (100), wherein a platform (101) is fixedly connected to the top of the cabinet (100), a frame (102) is fixedly mounted on the platform (101), a loading device (200) is fixedly mounted on the frame (102), a fixed friction pair (300) is mounted between the loading device (200) and the platform (101), a sliding friction pair (400) is slidably connected to the fixed friction pair (300), a driving device (500) is transmission-connected to the sliding friction pair (400), a lubricating oil supply system (700) and a temperature control system (800) are connected to the fixed friction pair (300), and a temperature control system (800) is installed inside the cabinet (100). A control system electrically connected to the loading device (200), the driving device (500), the lubricating oil supply system (700) and the temperature control system (800); the control system electrically connected to a detection device (600); the detection device (600) is used to detect pressure changes between the loading device (200) and the fixed friction pair (300) and between the sliding friction pair (400) and the driving device (500); the fixed friction pair (300) comprises a first fixed seat (301) fixedly mounted on the platform (101); the loading device (200) is fixedly connected to a first fixed seat (301) symmetrically arranged with respect to the first fixed seat (301); A second fixed seat (302) is disposed, the first fixed seat (301) and the second fixed seat (302) are each provided with a mounting groove (303) at one end close to each other, a mounting box (304) is installed inside the mounting groove (303), the two mounting boxes (304) are each provided with a mounting cavity (305) at one end close to each other, a fixed friction block (306) is sealed and slidably connected inside the mounting cavity (305), and the sliding friction pair (400) is slidably connected to the two fixed friction blocks (306) at the same time; the sliding friction pair (400) comprises a sliding seat (401), and the sliding seat (401) is provided with a mounting groove corresponding to the fixed friction pair (300). A mounting through hole (402) is provided, a sliding friction block (403) is installed inside the mounting through hole (402), a clamping seat (404) is fixedly installed on the outer side of the sliding seat (401) corresponding to the driving device (500), a clamping block (405) is slidably installed inside the clamping seat (404), the detection device (600) comprises a second pressure sensor (602), the second pressure sensor (602) is fixedly connected to the clamping block (405), and one end of the second pressure sensor (602) away from the clamping block (405) is fixedly connected to the driving device (500); the second pressure sensor (602) is electrically connected to the control system.

2. A lubricating oil sliding friction test bench according to claim 1, characterized in that: The loading device (200) comprises a mounting plate (201) fixedly mounted on the frame (102), a telescopic member (202) being fixedly mounted on the mounting plate (201), the detection device (600) comprising a first pressure sensor (601), one end of the first pressure sensor (601) being fixedly connected to the telescopic end of the telescopic member (202), and one end of the first pressure sensor (601) away from the telescopic member (202) being fixedly connected to the fixed friction pair (300); the telescopic member (202) and the first pressure sensor (601) are both electrically connected to the control system.

3. The lubricating oil sliding friction test bench according to claim 1, characterized in that: The fixed friction block (306) is provided with a plurality of rows of through holes (307) arranged in parallel, and an oil supply channel (308) is provided inside the installation box (304) corresponding to each row of the through holes (307). An oil supply pipe (309) communicating with the oil supply channel (308) is fixedly connected to the installation box (304), and the oil supply pipe (309) is sealingly and slidably connected to the through hole (307). A pressure hole (310) communicating with the oil supply channel (308) is provided between each two of the oil supply pipes (309) on the installation box (304), and an oil supply channel (311) corresponding to the oil supply channel (308) is provided on the first fixed seat (301) and the second fixed seat (302), and the oil supply channel (311) is sealingly and correspondingly communicated with the oil supply channel (308). The first fixed seat (301) and the second fixed seat (302) are provided with a plurality of oil supply channels (311) corresponding to the oil supply channels (308). The oil supply channel (311) is sealingly and correspondingly communicated with the oil supply channel (308). An oil delivery box (312) in communication with the oil delivery channel (311) is fixedly and sealingly connected to the second fixed seat (302); the oil delivery box (312) is in sealing communication with the oil outlet end of the lubricating oil supply system (700); a valve hole (313) penetrating the oil delivery channel (311) is provided on both the first fixed seat (301) and the second fixed seat (302); a valve core (314) is sealingly and slidably connected inside the valve hole (313); a spring (315) is installed at one end of the valve core (314) away from the sliding friction pair (400); the spring (315) is used to push the valve core (314) to block the oil delivery channel (311); the valve core (314) is made of magnetic material; a magnetic strip (316) corresponding to the valve core (314) is fixedly installed on the sliding friction pair (400) along its sliding direction.

4. A lubricating oil sliding friction test bench according to claim 3, characterized in that: An oil return groove (317) is provided on the first fixing seat (301) around the mounting groove (303), and an oil return hole (318) connected to the oil return groove (317) is provided on the first fixing seat (301). The oil return hole (318) is sealed and connected to the oil return end of the lubricating oil supply system (700).

5. The lubricating oil sliding friction test bench according to claim 1, characterized in that: The driving device (500) comprises a driving motor (501), a slide rail (502) is fixedly mounted on the platform (101), both ends of the slide rail (502) are fixedly connected with fixed blocks (503), a sliding block (504) is slidably connected to the slide rail (502), a driving shaft (505) penetrating the sliding block (504) is rotatably connected between the two fixed blocks (503), the driving shaft (505) is drivingly connected to the driving motor (501), two driving grooves (506) symmetrically arranged in a spiral shape are provided on the driving shaft (505), a driving shuttle (507) is rotatably connected inside the sliding block (504), and the driving shuttle (507) is slidably connected inside the driving groove (506); the driving motor (501) is electrically connected to the control system.

6. The lubricating oil sliding friction test bench according to claim 4, characterized in that: The lubricating oil supply system (700) comprises an oil storage tank (701), a partition (702) is sealed and fixedly connected to the oil storage tank (701), and a test oil chamber (703) and an oil return chamber (704) are respectively formed on both sides of the partition (702); a first delivery pump (705) is fixedly connected to the inside of the cabinet (100), an output end of the first delivery pump (705) is fixedly connected to a first oil delivery pipe (706), an input end of the first delivery pump (705) is fixedly connected to a second oil delivery pipe (707), an end of the first oil delivery pipe (706) away from the first delivery pump (705) is sealed and connected to the oil delivery tank (312), and an end of the second oil delivery pipe (707) away from the first delivery pump (705) is sealed and connected to the oil storage tank (701). The test oil chamber (703) is connected, an oil return pipe (708) is fixedly connected inside the cabinet (100), one end of the oil return pipe (708) is sealed and connected to the oil return hole (318) provided on the first fixing seat (301), the other end of the oil return pipe (708) is sealed and connected to the oil return chamber (704) in the oil storage tank (701), an oil tank cover (709) is sealingly and slidably connected to the second oil delivery pipe (707) and the oil return pipe (708) corresponding to the oil storage tank (701), the oil tank cover (709) is sealed and connected to the oil storage tank (701), a ventilation groove (710) is provided on the partition plate (702) near the top of the oil storage tank (701), and the first delivery pump (705) is electrically connected to the control system.

7. The lubricating oil sliding friction test bench according to claim 1, characterized in that: The temperature control system (800) comprises a refrigeration box (801) and a heating box (802), wherein the interior of the refrigeration box (801) and the interior of the heating box (802) are both filled with a temperature control medium, the refrigeration box (801) is fixedly connected to a refrigerator (803) in a heat-conducting manner, and the heating box (802) is fixedly connected to a heater (804) in a heat-conducting manner, the refrigeration box (801) is respectively connected to a first electrically controlled valve (805) and a second electrically controlled valve (806), and the heating box (802) is respectively connected to a third electrically controlled valve (807) and a fourth electrically controlled valve (808), a first three-way pipe (809) is connected between the first electrically controlled valve (805) and the third electrically controlled valve (807), a second three-way pipe (810) is connected between the second electrically controlled valve (806) and the fourth electrically controlled valve (808), and the other end of the first three-way pipe (809) is connected to a second delivery pump (811). The first fixed seat (301) and the second fixed seat (302) are both equipped with heat exchange tubes (812), the two heat exchange tubes (812) are thermally connected to the fixed friction block (306) respectively, one end of the two heat exchange tubes (812) are connected in parallel to the output end of the second delivery pump (811), and one end of the two heat exchange tubes (812) away from the second delivery pump (811) are connected in parallel to the second three-way pipe (810), the first fixed seat (301) and the second fixed seat (302) are both equipped with temperature sensors, and the refrigerator (803), the heater (804), the first electrically controlled valve (805), the second electrically controlled valve (806), the third electrically controlled valve (807), the fourth electrically controlled valve (808), the second delivery pump (811) and the temperature sensor are all electrically connected to the control system.

8. A lubricating oil sliding friction test bench according to any one of claims 1 to 7, characterized in that: The control system comprises an industrial computer and a programmable logic controller, the industrial computer being provided with a human-machine interaction interface for inputting test parameters, the loading device (200), the driving device (500), the detection device (600), the lubricating oil supply system (700), and the temperature control system (800) being electrically connected to the industrial computer and the programmable logic controller, and the programmable logic controller controlling the loading device (200), the driving device (500), the lubricating oil supply system (700), and the temperature control system (800) according to instructions sent by the industrial computer.

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