Powder metallurgy sliding bearing testing device

Abstract

The utility model discloses a powder metallurgy sliding bearing testing device which is characterized in that the powder metallurgy sliding bearing testing device comprises a bottom plate, an adjustable-speed motor and a testing assembly are arranged on the bottom plate in parallel, the testing assembly comprises a rotating shaft and two supporting seats which are arranged at intervals in the axial direction of the rotating shaft, and sliding bearings to be tested are arranged in the supporting seats. The rotating shaft is matched in the sliding bearing; a loading assembly is arranged between the two supporting seats, and the loading assembly is connected to the rotating shaft in a relatively rotating manner through a rolling bearing and applies a radial load to the rotating shaft; and an output shaft of the speed regulating motor is connected with the rotating shaft through a transmission mechanism. The device has the advantages of simple structure, convenience in operation and use, low use cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing testing, in particular to a powder metallurgy sliding bearing testing device. Background Art

[0002] Bearings are essential basic parts in all kinds of mechanical equipment in today's era. The quality of their performance directly affects and determines the performance of mechanical equipment. According to the form of friction during operation, they are divided into two categories: rolling bearings and sliding bearings. Rolling friction occurs when rolling bearings rotate, and sliding friction occurs between surfaces when sliding bearings rotate. Sliding bearings have the characteristics of high speed, stable operation, good vibration resistance, large bearing capacity, low noise and long life. They are widely used in machinery manufacturing, large power stations, steel joint enterprises, chemical joint enterprises and other fields.

[0003] Powder metallurgy oil-containing bearings are a type of sliding bearings, made of porous materials with lubricating oil stored in the pores. The thermal expansion coefficients of porous materials and lubricating oil are different, so when running at high speed, the oil is squeezed from the pores into the friction surface, and when the operation stops, the oil is sucked back into the pores as the temperature drops, but a small amount of oil will be volatilized in the process. Powder metallurgy oil-containing bearings are particularly suitable for working environments that are difficult to lubricate or do not allow oil to be contaminated. They have the characteristics of low cost, vibration absorption, low noise, and no need to add lubricating oil for a long time. In the laboratory, in order to study the performance of powder metallurgy sliding bearings, it is necessary to test the wear of sliding bearings under different loads or different speeds. Therefore, how to provide a device with a simple structure, low cost, and the ability to test the wear of sliding bearings. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is: how to provide a powder metallurgy sliding bearing testing device with simple structure, convenient operation and use, and low use cost.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A powder metallurgy sliding bearing testing device, characterized in that it includes a base plate, on which a speed regulating motor and a test assembly are arranged parallel to each other, the test assembly includes a rotating shaft and two support seats arranged at intervals along the axial direction of the rotating shaft, a sliding bearing to be tested is arranged in the support seat, and the rotating shaft is fitted in the sliding bearing; a loading assembly is arranged between the two support seats, the loading assembly is relatively rotatably connected to the rotating shaft through a rolling bearing, and applies a radial load to the rotating shaft; the output shaft of the speed regulating motor is connected to the rotating shaft through a transmission mechanism.

[0007] By adopting the above structure, a radial load is applied to the rotating shaft through the loading assembly between the two support seats, so that the rotation of the sliding bearing under different loads can be simulated, and by adjusting the speed of the speed regulating motor, the speed of the rotating shaft can be changed to simulate the working state of the sliding bearing at different speeds. Before the test, the sliding bearing is weighed, and after the test is completed, the sliding bearing is weighed again, and the wear amount can be obtained by the difference between the two weighings. The above device has a simple structure, is easy to operate and use, and has a low cost of use.

[0008] Furthermore, the test assembly also includes two stoppers arranged at both ends of the rotating shaft, and the two ends of the rotating shaft can be relatively rotatably abutted against the corresponding stoppers.

[0009] In this way, the two blocks can prevent the rotating shaft from moving left and right, making the rotation of the sliding bearing more stable and reliable, which is beneficial to ensure the accuracy of the test.

[0010] Furthermore, the loading assembly is a hanging rod suspended on the outer ring of the rolling bearing, and the lower end of the hanging rod has a coaxially arranged hanging plate.

[0011] In this way, by adding weights to the hanging plate of the hanging rod, the radial load of the rotating shaft can be changed.

[0012] Furthermore, the loading assembly includes a spring balance radially connected to the outer ring of the rolling bearing, and the other end of the spring balance is connected to the base plate through a stretching mechanism.

[0013] In this way, a pulling force is applied to the spring balance through the stretching mechanism, and the spring balance applies the pulling force to the rotating shaft through the rolling bearing. At the same time, the magnitude of the pulling force is displayed on the spring balance.

[0014] Furthermore, a fixed pulley is provided on the base plate, and the fixed pulley is located directly below the rolling bearing; a support is provided on the outer side of the base plate, and the support has a threaded hole set through it, and an adjusting bolt is fitted through it; the stretching mechanism includes a pull rope, one end of which is connected to the spring balance, and the other end passes around the fixed pulley and is wrapped around the adjusting bolt.

[0015] In this way, the pull rope can be driven by simply turning the adjusting bolt, and radial tension can be applied to the spring balance using the fixed pulley.

[0016] Furthermore, the fixed pulley is arranged in the same direction as the rotating shaft, the pull rope passes around the fixed pulley and extends outward in the horizontal direction; and the adjusting bolt is arranged orthogonally to the extension direction of the stretch.

[0017] Furthermore, the transmission mechanism includes a synchronous wheel arranged on the output shaft and the rotating shaft of the speed regulating motor, and the synchronous wheel is connected with a synchronous belt.

[0018] Furthermore, a temperature sensor capable of displaying temperature is arranged on the bottom plate, and a temperature probe of the temperature sensor is arranged at a position of the support seat close to the sliding bearing.

[0019] In this way, the operating temperature of the sliding bearing can be measured in real time through the temperature sensor, and the temperature rise of the sliding bearing can be recorded.

[0020] Furthermore, a decibel tester is also arranged on the bottom plate, and the decibel tester is close to the rotating shaft.

[0021] In this way, the decibel upper limit can be set through the decibel tester, and the abnormal sound emitted when the speed is too fast or the load is too heavy can be monitored and an alarm will be triggered when it reaches the upper limit, so as to stop the machine in time to prevent accidents.

[0022] Furthermore, the rolling bearing is a cylindrical bearing.

[0023] In summary, the utility model has the advantages of simple structure, convenient operation and use, low use cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0025] Figure 2 This is a front view structural schematic diagram of Example 1.

[0026] Figure 3 This is a schematic diagram of the structure of the loading component of Example 2. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the embodiments.

[0028] Example 1: Figure 1 and Figure 2 As shown, a powder metallurgy sliding bearing test device comprises a base plate 1, on which a speed regulating motor 2 and a test assembly 3 are arranged in parallel with each other, the test assembly 3 comprises a rotating shaft 31 and two support seats 32 arranged at intervals along the axial direction of the rotating shaft 31, a sliding bearing 33 to be tested is arranged in the support seat 32, and the rotating shaft 31 is fitted in the sliding bearing 33; a loading assembly 34 is arranged between the two support seats 32, and the loading assembly 34 is relatively rotatably connected to the rotating shaft 31 through a rolling bearing, and applies a radial load to the rotating shaft 31; the output shaft of the speed regulating motor 2 is connected to the rotating shaft 31 through a transmission mechanism 4. In this embodiment, the transmission mechanism 4 comprises a synchronous wheel arranged on the output shaft of the speed regulating motor 2 and the rotating shaft 31, and a synchronous belt is connected to the synchronous wheel.

[0029] The bottom plate 1 is provided with a temperature sensor 5 that can display the temperature, and the temperature probe of the temperature sensor 5 is provided at a position of the support seat 32 close to the sliding bearing 33. The temperature sensor can measure the working temperature of the sliding bearing in real time, and can record the temperature rise of the sliding bearing. The bottom plate 1 is also provided with a decibel tester 6, and the decibel tester is close to the rotating shaft 31. The decibel upper limit value can be set by the decibel tester, and the abnormal sound emitted when the speed is too fast or the load is too heavy can be monitored to reach the upper limit value and alarm, so as to stop the machine in time to prevent accidents.

[0030] In order to prevent the shaft 31 from moving axially during rotation, the test assembly 3 further includes two stoppers 35 disposed at both ends of the shaft 31, and the two ends of the shaft 31 can be relatively rotatably abutted against the corresponding stoppers 35. This makes the rotation of the sliding bearing more stable and reliable, thereby facilitating the accuracy of the test.

[0031] In this embodiment, the rolling bearing is an outer ring plane cylindrical bearing, and its inner ring is fixedly connected to the transmission shaft through a fixing nut. The loading assembly 34 is a hanging rod welded and suspended on the outer ring of the outer ring plane cylindrical bearing. The lower end of the hanging rod has a hanging plate coaxially arranged, and the hanging plate is higher than the bottom plate. During operation, the inner ring of the outer ring plane cylindrical bearing is driven to rotate by the rotating shaft 31, and the outer ring of the outer ring plane cylindrical bearing, the hanging rod, the hanging plate and the weight do not rotate. By adding the weight of the weight on the hanging rod weight, the radial load of the rotating shaft can be changed.

[0032] By adopting the above structure, a radial load is applied to the rotating shaft through the loading assembly between the two support seats, so that the rotation of the sliding bearing under different loads can be simulated, and by adjusting the speed of the speed regulating motor, the speed of the rotating shaft can be changed to simulate the working state of the sliding bearing at different speeds. Before the test, the sliding bearing is weighed, and after the test is completed, the sliding bearing is weighed again, and the wear amount can be obtained by the difference between the two weighings. The above device has a simple structure, is easy to operate and use, and has a low cost of use.

[0033] Embodiment 2: The main difference between this embodiment and embodiment 1 is the structural difference of the loading component. In this embodiment, Figure 3As shown, the loading assembly 34 includes a spring balance 341 connected to the outer ring of the rolling bearing in the radial direction, and the other end of the spring balance 341 is connected to the base plate 1 through a stretching mechanism. Specifically, a fixed pulley 342 is provided on the base plate 1, and the fixed pulley 342 is located directly below the rolling bearing; a support 343 is provided on the outer side of the base plate 1, and the support 343 has a threaded hole that is through-set, and is fitted with an adjusting bolt 344; the stretching mechanism includes a pull rope 345, one end of which is connected to the spring balance 341, and the other end passes around the fixed pulley 342 and is wound around the adjusting bolt 344. By rotating the adjusting bolt, the pull rope is driven to apply radial tension to the spring balance through the fixed pulley, and the spring balance applies the tension to the rotating shaft through the rolling bearing, and at the same time, the magnitude of the tension is displayed on the spring balance.

[0034] The fixed pulley is arranged in the same direction as the rotating shaft 31, and the pull rope passes around the fixed pulley and extends outward in the horizontal direction; the adjusting bolt is arranged orthogonally to the extension direction of the stretch.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A powder metallurgy sliding bearing testing device, characterized in that: The invention comprises a base plate (1), on which a speed regulating motor (2) and a test assembly (3) are arranged in parallel with each other, the test assembly (3) comprising a rotating shaft (31) and two support seats (32) arranged at intervals along the axial direction of the rotating shaft (31), a sliding bearing (33) to be tested is arranged in the support seat (32), and the rotating shaft (31) is fitted in the sliding bearing (33); a loading assembly (34) is arranged between the two support seats (32), the loading assembly (34) is connected to the rotating shaft (31) in a relatively rotatable manner via a rolling bearing, and applies a radial load to the rotating shaft (31); the output shaft of the speed regulating motor (2) is connected to the rotating shaft (31) via a transmission mechanism (4).

2. The powder metallurgy sliding bearing testing device according to claim 1, characterized in that: The test assembly (3) further comprises two stoppers (35) arranged at both ends of the rotating shaft (31); the two ends of the rotating shaft (31) are relatively rotatably abutted against the corresponding stoppers (35).

3. The powder metallurgy sliding bearing testing device according to claim 1, characterized in that: The loading component (34) is a hanging rod suspended on the outer ring of the rolling bearing, and the lower end of the hanging rod has a coaxially arranged hanging plate.

4. The powder metallurgy sliding bearing testing device according to claim 1, characterized in that: The loading assembly (34) comprises a spring balance radially connected to the outer ring of the rolling bearing, and the other end of the spring balance is connected to the base plate (1) via a stretching mechanism.

5. The powder metallurgy sliding bearing testing device according to claim 4, characterized in that: A fixed pulley is arranged on the bottom plate (1), and the fixed pulley is located directly below the rolling bearing; a support is arranged on the outer side of the bottom plate (1), and the support has a threaded hole arranged through it, and an adjusting bolt is arranged through it; the stretching mechanism comprises a pull rope, one end of which is connected to the spring balance, and the other end of which passes around the fixed pulley and is wound around the adjusting bolt.

6. The powder metallurgy sliding bearing testing device according to claim 5, characterized in that: The fixed pulley and the rotating shaft (31) are arranged in the same direction, the pull rope passes over the fixed pulley and extends outward in a horizontal direction; and the adjusting bolt is arranged orthogonally to the extension direction of the stretch.

7. The powder metallurgy sliding bearing testing device according to claim 1, characterized in that: The transmission mechanism (4) comprises a synchronous wheel arranged on the output shaft of the speed regulating motor (2) and the rotating shaft (31), and a synchronous belt is connected to the synchronous wheel.

8. The powder metallurgy sliding bearing testing device according to claim 1, characterized in that: The bottom plate (1) is provided with a temperature sensor (5) capable of displaying temperature, and a temperature probe of the temperature sensor (5) is arranged at a position of the support seat (32) close to the sliding bearing (33).

9. The powder metallurgy sliding bearing testing device according to claim 1, characterized in that: A decibel tester (6) is also provided on the bottom plate (1), and the decibel tester is close to the rotating shaft (31).

10. The powder metallurgy sliding bearing testing device according to claim 1, characterized in that: The rolling bearing is a cylindrical bearing.

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