Salt spray environment bearing fatigue testing machine

Abstract

The utility model provides a bearing fatigue testing machine in a salt spray environment, which relates to the technical field of bearing testing machines, and comprises a rack and a pump station, the pump station is arranged at the bottom end of the rack, a motor seat is fixedly arranged on the top surface of the rack, a servo motor is fixedly arranged on the top surface of the motor seat, and the servo motor is arranged on the top surface of the motor seat. A torque sensor is installed at the output end of the servo motor, couplings are arranged on the two sides of the torque sensor, a main shaft is arranged on the sides, away from the servo motor, of the couplings, a shaft seat is fixed to the surface of the main shaft, a stop seat is arranged on the side face of the shaft seat, and a salt mist box is arranged on the top face of the rack. The testing machine equipment adopts a horizontal frame and cantilever beam structure, is convenient for a worker to install, is provided with the salt mist box, adopts a lip-shaped sealing ring for dynamic sealing, is small in resistance, and can effectively avoid the influence of salt mist leakage on the bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing testing machines, in particular to a bearing fatigue testing machine in a salt spray environment. Background Art

[0002] During the design, research and production of bearings, they need to be tested to obtain the working performance parameters of the bearings and verify the working performance of the bearings. Specifically, the bearings are tested by simulating the actual working state of the bearings. In order to test the bearings, a corresponding testing machine will be designed according to the structural characteristics of the bearings to be tested. The testing machine generally includes a mounting structure that simulates the use of the bearings, and is provided with a loading mechanism that can apply a load to the bearing to be tested and a driving mechanism that drives the bearing to rotate, so as to simulate the actual working state of the bearings and test the bearings;

[0003] Chinese patent announcement number CN214200637U discloses a bearing testing machine, comprising a seat body and an upper cover detachably connected to the seat body, and also comprising a test shaft, the two ends of the seat body are respectively formed with supports, each of the supports is respectively provided with an outer lining assembly, the two outer lining assemblies are symmetrically arranged, each of the outer lining assemblies is respectively embedded with an inner lining assembly, the two inner lining assemblies are symmetrically arranged, test bearings are respectively installed at the two ends of the test shaft, the two test bearings are one-to-one rotatably connected in the two inner lining assemblies, and one end of the test shaft is drivingly connected to an electric spindle, the other end of the test shaft is provided with an axial loading device for providing axial force to the test bearing, and the test shaft is provided with a radial loading device at a position between the two test bearings;

[0004] In this existing design, although the bearing test seat of the existing bearing testing machine can be replaced with an outer lining assembly and an inner lining assembly embedded in the outer lining assembly, when testing bearings with different specifications but relatively small differences in outer diameter, only the inner lining assembly needs to be replaced without replacing the outer lining assembly, so that the same outer lining assembly can be used to test multiple bearings with different specifications, with relatively high utilization rate and relatively low cost. This bearing testing machine can adjust the axial spacing between two test bearings according to the size of the test bearing to avoid bending of the test shaft. By setting the outer lining assembly as two outer lining half-ring discs, when it is necessary to disassemble the test bearing, one of the outer lining half-ring discs of the outer lining can be disassembled on the seat body, and then the test shaft can be taken out, greatly reducing the weight of the components on the test shaft, making the disassembly more convenient. And because the weights at both ends of the test shaft are relatively small, the test shaft is not easily bent during the loading and unloading process, and the service life of the test shaft is relatively high. By setting the outer lining assembly as two inner lining half-ring discs, it helps to further reduce the weight on the test shaft during the loading and unloading process. In addition, during the process of disassembling and assembling the test bearing, the two inner lining half-ring discs can be separated first, and then the test bearing can be taken and placed, which is convenient for disassembly and assembly and not easy to damage the test bearing, ensuring the test accuracy. However, the traditional bearing testing machine has a relatively single function and is not convenient for testing data of bearing parts in a salt spray environment;

[0005] Therefore, a bearing fatigue testing machine in a salt spray environment is designed to solve the above problems. Utility Model Content

[0006] The purpose of the present utility model is to solve the technical problems proposed in the above background technology.

[0007] The present utility model adopts the following technical scheme: A bearing fatigue testing machine in a salt spray environment includes a frame and a pumping station. The pumping station is installed at the bottom end of the frame. A motor seat is fixedly installed on the top surface of the frame. A servo motor is fixedly installed on the top surface of the motor seat. A torque sensor is installed at the output end of the servo motor. Couplings are arranged on both sides of the torque sensor. A main shaft is arranged on the side of the coupling away from the servo motor. A shaft seat is fixed on the surface of the main shaft. A stop seat is arranged on the side of the shaft seat. A salt spray box is arranged on the top surface of the frame.

[0008] As a preferred embodiment of the bearing fatigue testing machine in a salt spray environment of the present utility model, a heating mechanism is arranged inside the salt spray box. The heating mechanism includes a circulation fan and a heating pipe. A brine sprayer is arranged inside the salt spray box. A salt spray collector is arranged inside the salt spray box. A salt spray purger is arranged inside the salt spray box.

[0009] As a preferred embodiment of the bearing fatigue testing machine in a salt spray environment of the present utility model, a bearing installation sleeve is arranged at one end of the main shaft. A bearing fixing seat is arranged at the top end of the bearing installation sleeve. A vibration sensor is arranged at the top end of the bearing fixing seat.

[0010] As an optimization of the bearing fatigue testing machine in a salt spray environment of the present utility model, the bearing mounting sleeve is inside the salt spray chamber and is located below the circulation fan and the heating pipe.

[0011] As an optimization of the bearing fatigue testing machine in a salt spray environment of the present utility model, a load actuator is provided at the bottom end of the bearing mounting sleeve, and an oil pressure sensor is provided at the bottom end of the load actuator.

[0012] As an optimization of the bearing fatigue testing machine in a salt spray environment of the present utility model, the salt spray collector and the salt spray purger are symmetrically distributed inside the salt spray chamber.

[0013] As an optimization of the bearing fatigue testing machine in a salt spray environment of the present utility model, the salt spray chamber uses a lip seal for dynamic sealing, and the main shaft is made of duplex stainless steel.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0015] 1. In the present utility model, the testing machine equipment adopts a horizontal frame and a cantilever beam structure, which is convenient for the staff to install. A salt spray chamber is provided, and the salt spray chamber uses a lip seal for dynamic sealing, with small resistance, which can effectively avoid the influence of salt spray leakage on the bearing. A torque sensor is used to measure the friction force, with small system error and high measurement accuracy. By placing the bearing parts into the salt spray chamber, the brine sprayer sprays brine onto the bearing parts. The salt spray purger uses a tower-type sprayer and is equipped with a purification device and a constant temperature device. The salt spray is transported to the salt spray collector through the pressure difference. A heating mechanism is adopted, and the temperature can be controlled by circulating the circulation fan and the salt spray cavity. The main shaft is made of duplex stainless steel, which has good acid and alkali corrosion resistance, meets the requirements of mechanical comprehensive performance, has high machining accuracy, and reliable mechanical performance. Description of the Drawings

[0016] Figure 1 is a schematic diagram of a bearing fatigue testing machine in a salt spray environment proposed by the present utility model;

[0017] Figure 2 is a side view of a bearing fatigue testing machine in a salt spray environment proposed by the present utility model.

[0018] Legend:

[0019] 1. Frame; 2. Pump station; 3. Motor base; 4. Servo motor; 5. Torque sensor; 6. Coupling; 7. Main shaft; 8. Shaft seat; 9. Stop seat; 10. Salt spray chamber;

[0020] 11. Heating mechanism; 1101. Circulation fan; 1102. Heating pipe;

[0021] 12. Brine sprayer; 13. Salt mist collector; 14. Salt mist purger; 15. Bearing installation sleeve; 16. Bearing fixing seat; 17. Vibration sensor; 18. Load actuator; 19. Oil pressure sensor. Detailed implementation manner

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described below in conjunction with the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0023] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0024] Embodiment

[0025] Please refer to Figure 1-2 , the present utility model provides a technical solution: a bearing fatigue testing machine in a salt mist environment, including a frame 1 and a pumping station 2. The pumping station 2 is installed at the bottom end of the frame 1. A motor base 3 is fixedly installed on the top surface of the frame 1. A servo motor 4 is fixedly installed on the top surface of the motor base 3. A torque sensor 5 is installed at the output end of the servo motor 4. The torque sensor 5 is used to measure the frictional force, with small system error and high measurement accuracy. Couplings 6 are arranged on both sides of the torque sensor 5. A main shaft 7 is arranged on the side of the coupling 6 away from the servo motor 4. One end of the main shaft 7 is provided with a bearing installation sleeve 15. A load actuator 18 is arranged at the bottom end of the bearing installation sleeve 15. An oil pressure sensor 19 is arranged at the bottom end of the load actuator 18. The bearing installation sleeve 15 is inside the salt mist chamber 10 and is located below the circulation fan 1101 and the heating tube 1102. A bearing fixing seat 16 is arranged at the top end of the bearing installation sleeve 15. A vibration sensor 17 is arranged at the top end of the bearing fixing seat 16. A shaft seat 8 is fixed on the surface of the main shaft 7. A stop seat 9 is arranged on the side of the shaft seat 8. A salt mist chamber 10 is arranged on the top surface of the frame 1. The salt mist chamber 10 uses a lip seal for dynamic sealing, with small resistance and effectively avoiding the influence of salt mist leakage on bearing parts. The main shaft 7 is made of duplex stainless steel, which has good acid and alkali corrosion resistance, meets the requirements of mechanical comprehensive performance, has high machining accuracy and reliable mechanical performance. A heating mechanism 11 is arranged inside the salt mist chamber 10. The heating mechanism 11 includes a circulation fan 1101 and a heating tube 1102. A brine sprayer 12 is arranged inside the salt mist chamber 10 to convey brine to the brine test cavity. The brine outlet is Small holes are evenly arranged in a porous manner to ensure the uniformity of the brine. The test requirements are achieved through the spraying method. A salt mist collector 13 is provided inside the salt mist chamber 10. The salt mist collector 13 and the salt mist purger 14 are symmetrically distributed inside the salt mist chamber 10. A salt mist purger 14 is provided inside the salt mist chamber 10.

[0026] Working principle: During use, the inner ring of the bearing part is installed with the bearing mounting sleeve 15, and the outer ring of the bearing part is installed with the bearing fixing seat 16. Then the whole is installed on the main shaft 7. The servo motor 4 is enabled, and the servo motor 4 drives the main shaft 7 to rotate. The outer ring of the bearing part is stopped by the stop seat 9, and the inner ring of the bearing part rotates with the main shaft 7. The force is loaded hydraulically to the required test strength. The inner and outer rings of the bearing part rotate relative to each other, and the friction force is precisely measured by the torque sensor 5. During this period, the temperature is controlled only to the required temperature by the heating tube 1102 and the circulation fan 1101. The salt mist purger 14 continuously purges, and the salt mist sprayer sprays the brine at regular intervals until the bearing part fails due to fatigue, that is, the torque sensor 5 or the vibration sensor 17 exceeds the set value. At this time, the fatigue data of the bearing part can be measured.

[0027] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A salt spray environment bearing fatigue testing machine, comprising a frame (1) and a pump station (2), characterized in that: The pump station (2) is installed at the bottom end of the frame (1); a motor seat (3) is fixedly installed on the top surface of the frame (1); a servo motor (4) is fixedly installed on the top surface of the motor seat (3); a torque sensor (5) is installed on the output end of the servo motor (4); couplings (6) are arranged on both sides of the torque sensor (5); a main shaft (7) is arranged on the side of the coupling (6) away from the servo motor (4); a shaft seat (8) is fixed on the surface of the main shaft (7); a stop seat (9) is arranged on the side of the shaft seat (8); and a salt spray chamber (10) is arranged on the top surface of the frame (1).

2. The salt spray environment bearing fatigue testing machine according to claim 1, characterized in that: The salt spray box (10) is provided with a heating mechanism (11) inside, the heating mechanism (11) comprises a circulating fan (1101) and a heating pipe (1102), the salt spray box (10) is provided with a salt water sprayer (12), the salt spray box (10) is provided with a salt spray collector (13), and the salt spray box (10) is provided with a salt spray blower (14).

3. The salt spray environment bearing fatigue testing machine according to claim 2 is characterized in that: A bearing mounting sleeve (15) is arranged at one end of the main shaft (7), a bearing fixing seat (16) is arranged at the top end of the bearing mounting sleeve (15), and a vibration sensor (17) is arranged at the top end of the bearing fixing seat (16).

4. The salt spray environment bearing fatigue testing machine according to claim 3 is characterized in that: The bearing mounting sleeve (15) is inside the salt spray chamber (10) and is located below the circulating fan (1101) and the heating tube (1102).

5. The salt spray environment bearing fatigue testing machine according to claim 4 is characterized in that: A load actuator (18) is arranged at the bottom end of the bearing mounting sleeve (15), and an oil pressure sensor (19) is arranged at the bottom end of the load actuator (18).

6. The salt spray environment bearing fatigue testing machine according to claim 5, characterized in that: The salt mist collector (13) and the salt mist blower (14) are symmetrically distributed inside the salt mist box (10).

7. The salt spray environment bearing fatigue testing machine according to claim 6, characterized in that: The salt spray chamber (10) adopts a lip seal ring for dynamic sealing, and the main shaft (7) is made of duplex stainless steel.

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