Reliability test platform for main bearing of aero-engine

Abstract

The utility model discloses a reliability test platform for an aero-engine main bearing, which comprises a test platform body and a clamping seat, the top end of the test platform body is provided with the clamping seat, and the top end of the test platform body at one side of the clamping seat is provided with a sliding seat. An electric push rod is mounted at the top end of the test platform body on one side of the sliding seat, the output end of the electric push rod is connected with the sliding seat, a first motor is mounted on the outer wall of the sliding seat above the electric push rod, the output end of the first motor extends into the sliding seat, and a rotating shaft is mounted at the output end of the first motor. According to the utility model, the test platform can conveniently clamp and fix a bearing in a double-clip manner, can conveniently adapt to bearings with different sizes in a rotary adjustment manner, can conveniently clamp and test the bearings with different sizes, and can improve the test efficiency of the test platform.

Description

Technical Field

[0001] The utility model relates to the technical field of test platforms, in particular to a reliability test platform for a main bearing of an aero-engine. Background Art

[0002] Bearings are an important component in contemporary mechanical equipment. In aircraft engines, the main task of bearings is to ensure that the rotor can remain stable during high-speed rotation, which is crucial for the smooth flight and power output of the aircraft. The performance of bearings is directly related to the reliability and life of the engine. However, the working environment of aircraft engines is extremely harsh. Not only do they require bearings to withstand extremely high speeds, but they also have to work under high temperature and high pressure conditions. This places extremely high demands on the materials and designs of bearings. Without effective cooling and lubrication, bearings may reach a temperature that destroys metal in a short period of time. Therefore, the design of bearings not only needs to consider how to withstand the physical load brought by high-speed rotation, but also how to effectively dissipate heat and reduce wear. Therefore, a large number of bearing reliability tests are needed to expose shortcomings, make improvements, improve the reliability of the main bearings, and extend the service life of the bearings.

[0003] For example, a reliability test device for an aircraft engine main bearing disclosed in the authorization announcement number CN205785814U includes a shaft and a plurality of first electromagnets distributed circumferentially along the shaft, wherein the shaft is used to support the main bearing of the aircraft engine, each first electromagnet has a gap with the shaft, and a radial load pointing from its own axis to the first electromagnet is applied to the shaft when power is turned on;

[0004] Although it realizes the electromagnetic loading method, it can conveniently realize radial loading on the main bearing with a simple structure, and can flexibly control the radial loading direction by controlling the power supply of the corresponding first electromagnet, and can further accurately adjust the loading type by controlling the power supply parameters, so that the real operating conditions can be simulated as much as possible when the reliability test of the main bearing is carried out. However, it does not solve the problem that the existing test platform is not conducive to convenient clamping and fixing bearings, not conducive to rotation and adjustment to adapt to bearings of different sizes, and not conducive to clamping and testing bearings of different sizes, which affects the testing range and efficiency of the test platform. Utility Model Content

[0005] The purpose of the utility model is to provide a reliability test platform for aircraft engine main bearings, so as to solve the problem proposed in the above background technology that the test platform is not convenient for convenient clamping and fixing bearings, is not conducive to rotation and adjustment to adapt to bearings of different sizes, is not conducive to clamping and testing bearings of different sizes, and affects the test range and efficiency of the test platform.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reliability test platform for the main bearing of an aircraft engine, comprising a test platform body and a clamping seat, a clamping seat being installed at the top of the test platform body, a sliding seat being arranged at the top of the test platform body on one side of the clamping seat, an electric push rod being installed at the top of the test platform body on one side of the sliding seat, and an output end of the electric push rod being connected to the sliding seat, a first motor being installed on the outer wall of the sliding seat above the electric push rod, an output end of the first motor extending to the inside of the sliding seat, a rotating shaft being installed at the output end of the first motor, and the rotating shaft extending to the outside of the sliding seat, and the rotating shaft being movably connected to the sliding seat, and a side of the rotating shaft away from the sliding seat A support base is installed at the end, a fourth motor is installed inside the support base, a battery is arranged inside the support base on one side of the fourth motor, and the battery is electrically connected to the fourth motor, a support frame is arranged outside the support base, and the support frame is connected to the support base, a threaded rod is movably installed inside the support frame, and the output end of the fourth motor is connected to the threaded rod, a threaded block is mounted on the surface of the threaded rod, and the threaded block is threadedly connected to the threaded rod, three groups of movable arms with equal spacing are arranged on the outer wall of the support base on one side of the fourth motor, a movable shaft is installed at one end of the movable arm close to the support base, and the movable arms are movably connected to the support base through the movable shaft, and a friction block is installed at one end of the movable arm away from the support base.

[0007] Preferably, three groups of connecting arms with equal spacing are provided on the outer wall of the threaded block, a lower connecting shaft is installed on one end of the connecting arm close to the threaded block, and the connecting arms are movably connected to the threaded block through the lower connecting shaft, and an upper connecting shaft is installed on one end of the connecting arm away from the lower connecting shaft, and the connecting arms are movably connected to the movable arm through the upper connecting shaft.

[0008] Preferably, slide rails are symmetrically installed on the top of the test platform body below the sliding seat, and the sliding seats are all slidably connected to the slide rails.

[0009] Preferably, a first sliding frame is slidably mounted on the outer wall of the clamping seat, and the first sliding frame extends into the interior of the clamping seat, a first clamping plate is arranged inside the clamping seat on one side of the first sliding frame, and the first sliding frame is connected to the first clamping plate.

[0010] Preferably, a second sliding frame is slidably installed on the side of the outer wall of the clamping seat away from the first sliding frame, and the second sliding frame extends to the interior of the clamping seat, a second clamping plate is arranged inside the clamping seat on one side of the second sliding frame, and the second sliding frame is connected to the second clamping plate, and a bearing body is arranged between the first clamping plate and the second clamping plate, and a temperature sensor is installed on the top of the clamping seat on one side of the bearing body.

[0011] Preferably, a third motor is installed on the outer wall of the clamping seat on one side of the second sliding frame, a second gear is installed on the output end of the third motor, a second rack is installed on the bottom end of the second sliding frame on one side of the second gear, and the second gear and the second rack are meshed with each other.

[0012] Preferably, a second motor is installed on the outer wall of the clamping seat on one side of the third motor, a first gear is installed on the output end of the second motor, a connecting bent arm is installed on the outer wall of the first clamping plate, a linkage shaft is mounted inside the connecting bent arm, and the linkage shaft extends to the outside of the clamping seat, a first rack is installed on the surface of the linkage shaft on one side of the first gear, and the first gear and the first rack are meshed with each other.

[0013] Preferably, a control panel is installed on the outer wall of the test platform body, and the output end of the control panel is electrically connected to the input ends of the electric push rod, the first motor, the second motor, the third motor, and the temperature detector.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the test platform not only realizes the convenient clamping and fixing of bearings by the test platform, but also facilitates the rotation adjustment to adapt to bearings of different sizes, facilitates the clamping and testing of bearings of different sizes, and improves the test efficiency of the test platform;

[0015] (1) By driving the first gear to rotate by the second motor, the first gear drives the first rack to move, the first rack drives the linkage shaft to move, the linkage shaft drives the first clamping plate to move through the connecting arm, the third motor drives the second gear to rotate, the second gear drives the second rack to move, the second rack drives the second sliding frame to move, and the second sliding frame drives the second clamping plate to move, so that the second sliding frame and the first clamping plate can be conveniently clamped and fixed to the bearing body, thereby realizing the convenient clamping and fixing of the bearing on the test platform, facilitating the clamping of bearings of different sizes, and improving the convenience of control and adjustment of the test platform;

[0016] (2) The sliding seat is driven by an electric push rod to move, and the sliding seat drives the first motor, the rotating shaft, and the support seat to move, so that the friction block enters the interior of the bearing body, and the battery inputs electric energy into the interior of the fourth motor, and the fourth motor is operated to drive the threaded rod to rotate, and the threaded block moves on the surface of the threaded rod, and the threaded block drives the connecting arm to rotate through the lower connecting shaft, and the connecting arm drives the movable arm to rotate through the upper connecting shaft, and the movable arm rotates around the movable shaft as the axis, so that the friction block contacts the interior of the bearing body, and the bearing body is fixedly supported by multiple groups of friction blocks, and the rotating shaft is driven by the first motor to rotate, and the rotating shaft drives the support seat to rotate as a whole, and the support seat drives the bearing body to rotate and rub through the friction block, so as to facilitate the temperature meter to detect the real data of the bearing body under the condition of high-speed friction and high temperature, so as to realize the convenient rotation adjustment of the test platform to adapt to bearings of different sizes, facilitate rapid rotation test, increase the detection range of bearings of different sizes, and improve the test efficiency of the test platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the support seat of the utility model;

[0019] Figure 3 This is a front view structural schematic diagram of the utility model;

[0020] Figure 4 It is a three-dimensional enlarged structural schematic diagram of the movable arm of the utility model;

[0021] Figure 5 It is a three-dimensional enlarged structural schematic diagram of the clamping seat of the utility model.

[0022] In the figure: 1. test platform body; 2. clamping seat; 3. sliding seat; 4. electric push rod; 5. support seat; 6. first motor; 7. rotating shaft; 8. first sliding frame; 9. first clamping plate; 10. second sliding frame; 11. second clamping plate; 12. second motor; 13. first gear; 14. first rack; 15. linkage shaft; 16. connecting arm; 17. third motor; 18. second gear; 19. second rack; 20. bearing body; 21. battery; 22. fourth motor; 23. threaded rod; 24. threaded block; 25. support frame; 26. movable arm; 27. connecting arm; 28. upper connecting shaft; 29. ​​lower connecting shaft; 30. movable shaft; 31. friction block; 32. control panel; 33. slide rail; 34. temperature detector. DETAILED DESCRIPTION

[0023] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0024] See also Figure 1-5 The utility model provides an embodiment: a reliability test platform for the main bearing of an aircraft engine, comprising a test platform body 1 and a clamping seat 2, the clamping seat 2 is installed at the top of the test platform body 1, a sliding seat 3 is arranged at the top of the test platform body 1 on one side of the clamping seat 2, an electric push rod 4 is installed at the top of the test platform body 1 on one side of the sliding seat 3, the electric push rod 4 plays a role in power output, and the output end of the electric push rod 4 is connected to the sliding seat 3, a first motor 6 is installed on the outer wall of the sliding seat 3 above the electric push rod 4, and the first motor 6 plays a role in power output;

[0025] The output end of the first motor 6 extends to the inside of the sliding seat 3, the output end of the first motor 6 is installed with a rotating shaft 7, and the rotating shaft 7 extends to the outside of the sliding seat 3, and the rotating shaft 7 is movably connected to the sliding seat 3, and the end of the rotating shaft 7 away from the sliding seat 3 is installed with a support seat 5, and the support seat 5 is installed with a fourth motor 22 inside, and the fourth motor 22 plays a role in power output, and the support seat 5 on one side of the fourth motor 22 is provided with a battery 21 inside, and the battery 21 is electrically connected to the fourth motor 22, and the support seat 5 is provided outside There is a support frame 25, and the support frame 25 is connected to the support seat 5. A threaded rod 23 is movably installed inside the support frame 25, and the output end of the fourth motor 22 is connected to the threaded rod 23. A threaded block 24 is mounted on the surface of the threaded rod 23, and the threaded block 24 is threadedly connected to the threaded rod 23. Three groups of movable arms 26 with equal spacing are arranged on the outer wall of the support seat 5 on one side of the fourth motor 22. A movable shaft 30 is installed at one end of the movable arm 26 close to the support seat 5, and the movable arm 26 is movably connected to the support seat 5 through the movable shaft 30.

[0026] The end of the movable arm 26 away from the support seat 5 is equipped with a friction block 31, and three groups of connecting arms 27 with equal spacing are arranged on the outer wall of the threaded block 24. The end of the connecting arm 27 close to the threaded block 24 is equipped with a lower connecting shaft 29, and the connecting arm 27 is movably connected to the threaded block 24 through the lower connecting shaft 29. The end of the connecting arm 27 away from the lower connecting shaft 29 is equipped with an upper connecting shaft 28, and the connecting arm 27 is movably connected to the movable arm 26 through the upper connecting shaft 28. The top of the test platform body 1 below the sliding seat 3 is symmetrically equipped with a slide rail 33, and the sliding seat 3 is slidably connected to the slide rail 33;

[0027] When in use, the electric push rod 4 is turned on by operating the control panel 32. Under the sliding support of the sliding seat 3 and the slide rail 33, the electric push rod 4 drives the sliding seat 3 to move, and the sliding seat 3 drives the first motor 6, the rotating shaft 7, and the support seat 5 to move, so that the friction block 31 enters the interior of the bearing body 20. The battery 21 inputs electric energy into the interior of the fourth motor 22, and the fourth motor 22 is operated to drive the threaded rod 23 to rotate. Under the thread cooperation between the threaded rod 23 and the threaded block 24, the threaded block 24 moves on the surface of the threaded rod 23. Under the sliding support of the threaded block 24 and the support frame 25, the threaded block 24 drives the connecting arm 27 to rotate through the lower connecting shaft 29, and the connecting arm 27 drives the movable arm 26 to rotate through the upper connecting shaft 28. The movable arm 26 rotates with the movable shaft 30 The shaft is rotated to make the friction block 31 contact with the inside of the bearing body 20. The bearing body 20 is fixedly supported by multiple groups of friction blocks 31. The control panel 32 is operated to turn on the first motor 6 and the temperature detector 34. The first motor 6 drives the rotating shaft 7 to rotate, and the rotating shaft 7 drives the support seat 5 to rotate as a whole. The support seat 5 drives the bearing body 20 to rotate and rub through the friction block 31, so that the temperature detector 34 can detect the real data of the bearing body 20 under the condition of high-speed friction and high temperature, so as to detect its temperature. The change of the bearing body 20 is observed through the change of temperature to conduct the test, so as to realize the convenient rotation adjustment type of the test platform to adapt to bearings of different sizes, facilitate the rotation test, and improve the test efficiency of the test platform;

[0028] A slide rail 33 is symmetrically installed on the top of the test platform body 1 below the sliding seat 3, and the sliding seats 3 are all slidably connected to the slide rail 33. A first sliding frame 8 is slidably installed on the outer wall of the clamping seat 2, and the first sliding frame 8 extends to the inside of the clamping seat 2. A first clamping plate 9 is arranged inside the clamping seat 2 on one side of the first sliding frame 8, and the first sliding frame 8 is connected to the first clamping plate 9. A second sliding frame 10 is slidably installed on the side of the outer wall of the clamping seat 2 away from the first sliding frame 8, and the second sliding frame 10 extends to the inside of the clamping seat 2. A second clamping plate 11 is arranged inside the clamping seat 2 on one side of the second sliding frame 10, and the second sliding frame 10 is connected to the second clamping plate 11, and the first clamping A bearing body 20 is arranged between the holding plate 9 and the second clamping plate 11, a temperature detector 34 is installed at the top of the clamping seat 2 on one side of the bearing body 20, and the model of the temperature detector 34 is a DSRF44N two-color optical fiber infrared thermometer, a third motor 17 is installed on the outer wall of the clamping seat 2 on one side of the second sliding frame 10, and the third motor 17 plays a role of power output, and a second gear 18 is installed at the output end of the third motor 17, and a second rack 19 is installed at the bottom end of the second sliding frame 10 on one side of the second gear 18, and the second gear 18 and the second rack 19 are meshed with each other, and a second motor 12 is installed on the outer wall of the clamping seat 2 on one side of the third motor 17, and the second motor 12 plays a role of power output;

[0029] A first gear 13 is installed at the output end of the second motor 12, a connecting arm 16 is installed on the outer wall of the first clamping plate 9, a linkage shaft 15 is sleeved inside the connecting arm 16, and the linkage shaft 15 extends to the outside of the clamping seat 2, a first rack 14 is installed on the surface of the linkage shaft 15 on one side of the first gear 13, and the first gear 13 and the first rack 14 are meshed with each other, a control panel 32 is installed on the outer wall of the test platform body 1, and the output end of the control panel 32 is electrically connected to the input end of the electric push rod 4, the first motor 6, the second motor 12, the third motor 17, and the temperature detector 34;

[0030] When in use, an external power supply is connected. First, the bearing body 20 is placed inside the clamping seat 2, and the second motor 12 and the third motor 17 are turned on by the operation control panel 32. The second motor 12 drives the first gear 13 to rotate. Under the meshing action of the first gear 13 and the first rack 14, the first gear 13 drives the first rack 14 to move, and the first rack 14 drives the linkage shaft 15 to move. Under the sliding support of the first sliding frame 8 and the clamping seat 2, the linkage shaft 15 drives the first clamping plate 9 to move through the connecting arm 16, and the third motor 17 drives the second gear 13 to move. The wheel 18 rotates, and under the meshing action of the second gear 18 and the second rack 19, the second gear 18 drives the second rack 19 to move, and the second rack 19 drives the second sliding frame 10 to move. Under the sliding support of the second sliding frame 10 and the clamping seat 2, the second sliding frame 10 drives the second clamping plate 11 to move, so as to facilitate the second sliding frame 10 and the first clamping plate 9 to carry out mobile clamping and fixing of the bearing body 20, thereby realizing convenient mobile clamping and fixing of the test platform, facilitating the clamping of bearings of different sizes, and improving the convenience of control and adjustment of the test platform.

[0031] Working principle: When in use, an external power supply is connected. First, the bearing body 20 is placed inside the clamping seat 2, and the first gear 13 is driven to rotate by the second motor 12, and the first gear 13 drives the first rack 14 to move, and the first rack 14 drives the linkage shaft 15 to move. Under the sliding support of the first sliding frame 8 and the clamping seat 2, the linkage shaft 15 drives the first clamping plate 9 to move through the connecting bent arm 16, and the second gear 18 is driven to rotate by the third motor 17, and the second gear 18 drives the second rack 19 to move, and the second rack 19 drives the second sliding frame 10 to move, and the second sliding frame 10 drives the second clamping plate 11 to move, so that the second sliding frame 10 and the first clamping plate 9 can clamp and fix the bearing body 20 in a mobile manner, and the sliding seat 3 is driven by the electric push rod 4 to move, and the sliding seat 3 drives the first motor 6, the rotating shaft 7, and the supporting seat 5 to move, so that friction The block 31 enters the interior of the bearing body 20, and the battery 21 inputs electric energy into the interior of the fourth motor 22. The fourth motor 22 is operated to drive the threaded rod 23 to rotate, and the threaded block 24 moves on the surface of the threaded rod 23. The threaded block 24 drives the connecting arm 27 to rotate through the lower connecting shaft 29, and the connecting arm 27 drives the movable arm 26 to rotate through the upper connecting shaft 28. The movable arm 26 rotates with the movable shaft 30 as the axis to make the friction block 31 contact with the interior of the bearing body 20. The bearing body 20 is fixedly supported by multiple groups of friction blocks 31, and the first motor 6 drives the rotating shaft 7 to rotate, and the rotating shaft 7 drives the support seat 5 to rotate as a whole. The support seat 5 drives the bearing body 20 to rotate and rub through the friction block 31, so as to facilitate the temperature meter 34 to detect the real data of the bearing body 20 under the condition of high friction and high temperature during high-speed rotation, so as to complete the use of the test platform.

[0032] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A reliability test platform for an aircraft engine main bearing, comprising a test platform body (1) and a clamping seat (2), characterized in that: A clamping seat (2) is installed at the top of the test platform body (1), a sliding seat (3) is arranged at the top of the test platform body (1) on one side of the clamping seat (2), an electric push rod (4) is installed at the top of the test platform body (1) on one side of the sliding seat (3), and the output end of the electric push rod (4) is connected to the sliding seat (3), a first motor (6) is installed on the outer wall of the sliding seat (3) above the electric push rod (4), the output end of the first motor (6) extends to the inside of the sliding seat (3), a rotating shaft (7) is installed at the output end of the first motor (6), the rotating shaft (7) extends to the outside of the sliding seat (3), and the rotating shaft (7) is movably connected to the sliding seat (3), a support seat (5) is installed at one end of the rotating shaft (7) away from the sliding seat (3), a fourth motor (22) is installed inside the support seat (5), and the support seat (5) on one side of the fourth motor (22) is connected to the first motor (6). ) is provided with a storage battery (21) inside, and the storage battery (21) is electrically connected to the fourth motor (22); a support frame (25) is provided outside the support seat (5), and the support frame (25) is connected to the support seat (5); a threaded rod (23) is movably installed inside the support frame (25), and the output end of the fourth motor (22) is connected to the threaded rod (23); a threaded block (24) is sleeved on the surface of the threaded rod (23), and the threaded block (24) is threadedly connected to the threaded rod (23); three groups of movable arms (26) are arranged at equal intervals on the outer wall of the support seat (5) on one side of the fourth motor (22); a movable shaft (30) is installed at one end of the movable arm (26) close to the support seat (5), and the movable arm (26) is movably connected to the support seat (5) through the movable shaft (30); and a friction block (31) is installed at one end of the movable arm (26) away from the support seat (5).

2. The reliability test platform for the main bearing of an aircraft engine according to claim 1, characterized in that: Three groups of connecting arms (27) are arranged at equal intervals on the outer wall of the threaded block (24); a lower connecting shaft (29) is mounted on one end of the connecting arm (27) close to the threaded block (24); and the connecting arm (27) is movably connected to the threaded block (24) via the lower connecting shaft (29); an upper connecting shaft (28) is mounted on one end of the connecting arm (27) away from the lower connecting shaft (29); and the connecting arm (27) is movably connected to the movable arm (26) via the upper connecting shaft (28).

3. The reliability test platform of an aircraft engine main bearing according to claim 1, characterized in that: Slide rails (33) are symmetrically mounted on the top of the test platform body (1) below the sliding seat (3), and the sliding seat (3) is slidably connected to the slide rails (33).

4. The reliability test platform for the main bearing of an aircraft engine according to claim 1, characterized in that: A first sliding frame (8) is slidably mounted on the outer wall of the clamping seat (2), and the first sliding frame (8) extends into the interior of the clamping seat (2). A first clamping plate (9) is arranged inside the clamping seat (2) on one side of the first sliding frame (8), and the first sliding frame (8) is connected to the first clamping plate (9).

5. The reliability test platform for the main bearing of an aircraft engine according to claim 4, characterized in that: A second sliding frame (10) is slidably mounted on a side of the outer wall of the clamping seat (2) away from the first sliding frame (8), and the second sliding frame (10) extends to the inside of the clamping seat (2), a second clamping plate (11) is arranged inside the clamping seat (2) on one side of the second sliding frame (10), and the second sliding frame (10) is connected to the second clamping plate (11), and a bearing body (20) is arranged between the first clamping plate (9) and the second clamping plate (11), and a temperature detector (34) is installed at the top of the clamping seat (2) on one side of the bearing body (20).

6. The reliability test platform for the main bearing of an aircraft engine according to claim 5, characterized in that: A third motor (17) is mounted on the outer wall of the clamping seat (2) on one side of the second sliding frame (10); a second gear (18) is mounted on the output end of the third motor (17); a second rack (19) is mounted on the bottom end of the second sliding frame (10) on one side of the second gear (18); and the second gear (18) and the second rack (19) are meshed with each other.

7. The reliability test platform for the main bearing of an aircraft engine according to claim 6, characterized in that: A second motor (12) is mounted on the outer wall of the clamping seat (2) on one side of the third motor (17), a first gear (13) is mounted on the output end of the second motor (12), a connecting arm (16) is mounted on the outer wall of the first clamping plate (9), a linkage shaft (15) is sleeved inside the connecting arm (16), and the linkage shaft (15) extends to the outside of the clamping seat (2), a first rack (14) is mounted on the surface of the linkage shaft (15) on one side of the first gear (13), and the first gear (13) and the first rack (14) are meshed with each other.

8. The reliability test platform for aircraft engine main bearings according to claim 1, characterized in that: A control panel (32) is mounted on the outer wall of the test platform body (1), and an output end of the control panel (32) is electrically connected to input ends of the electric push rod (4), the first motor (6), the second motor (12), the third motor (17), and the temperature detector (34).

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