A supporting bearing test equipment for helicopter rotor system

Abstract

The invention discloses a supporting bearing test equipment for a helicopter rotor system, belonging to the field of bearing test technology. A swing gear meshing with a driving fan is arranged on one side of a driven swing shaft, and a detection plate is arranged in the middle of the driven swing shaft; a gear ring is fixedly arranged on the inner side of the rotating shaft, and an internal gear is fixedly arranged in the middle of the gear ring; a flip gear intermittently meshing with the gear ring and the internal gear is installed on the inner side of the flip shaft, and a flip cylinder is fixedly arranged on the other side of the flip shaft; a toothed plate that cooperates with each other is slidably arranged on the detection plate, and a positioning frame is fixedly arranged at the bottom of the toothed plate, and the bearing to be tested is installed in the flip cylinder and the positioning frame. The invention can clamp and rotate the bearing to be tested through the flip cylinder and the sealing cover. When the rotating motor drives the gear ring and the internal gear to rotate, the external meshing teeth and the internal meshing teeth drive the flip gear and the bearing to be tested to intermittently reverse and rotate, thereby simulating the sealing effect under the high-intensity rotation mode. The design improves the automation level and detection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of bearing testing, in particular to a matching bearing testing device for a helicopter rotor system. Background Art

[0002] Bearings are an important component in contemporary mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. The impact of bearings on helicopter rotor systems is crucial because bearings are key components that support the rotor and ensure its smooth rotation. Bearings can provide precise support and positioning for the rotor system, ensuring that the rotor can rotate freely without axial or radial movement. Bearings can reduce direct contact between the rotor and the bearing seat, thereby reducing friction and wear and extending the service life of the helicopter rotor system. At the same time, bearings help maintain the concentricity of the motor rotor and stator, which is crucial for helicopter rotor systems.

[0003] The patent application with publication number CN118758509A discloses a detection device and detection method for the main shaft bearing of a wind turbine generator, which relates to the technical field of detection devices, and includes: a fixed seat, which is fixedly connected to the top of the bottom plate, and the fixed seat is set as a detachable bearing seat, and the fixed seat is used to place the bearing to be detected; a fixed plugging component, and the fixed plugging component is fixedly connected to one end of the fixed seat. The invention can simulate the state of the bearing under the load blade environment by setting a rotation simulation component and a load simulation component, and use an air pump to provide positive pressure to one end of the bearing when both ends of the bearing are blocked. When the bearing has poor sealing, the gas will pass through the bearing oil chamber and reach the other end, and then blow air to the barrel through the pipeline. The operator observes bubbles and regards it as a problem with the sealing. According to the above operation, the sealing detection of the main shaft bearing of the wind turbine generator under the load blade rotation state is realized, which improves the objectivity and accuracy of the detection result.

[0004] However, the above-disclosed bearing detection device has a general degree of automation and cannot simulate various working conditions and harsh environments for bearings. It also has a complex structure, a cumbersome installation process, and low detection efficiency. It cannot quickly install the bearings to be tested and perform multiple groups of simultaneous detection. Summary of the invention

[0005] The purpose of the present invention is to provide a supporting bearing test equipment for a helicopter rotor system in order to solve the problems that the existing bearing detection devices have a general degree of automation, cannot simulate various working conditions and harsh environments for bearings, have a complex structure, a cumbersome installation process, low detection efficiency, and cannot quickly install the bearings to be tested and perform multiple groups of synchronous detection.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a supporting bearing test equipment for a helicopter rotor system, including a detection frame, the detection frame includes a first vertical plate and a second vertical plate on both sides, a horizontal plate is arranged on the top of the first vertical plate and the second vertical plate; a swing plate is fixedly arranged on the inner side of the first vertical plate, and a hanging plate is fixedly arranged on the bottom of the horizontal plate; an active swing shaft is rotatably arranged in the middle part of the first vertical plate, a driving fan is fixedly arranged on the inner side of the active swing shaft, and a swing frame facing downward is arranged in the middle part of the active swing shaft; a driven swing shaft is movably arranged between the swing plate and the second vertical plate, and the driven swing shaft A swinging gear meshing with the driving fan is provided on one side of the driving shaft, and a detection plate is provided in the middle of the driven swinging shaft; a rotating shaft is also rotatably provided on the first vertical plate, a gear ring is fixedly provided on the inner side of the rotating shaft, and an internal gear is fixedly provided in the middle of the gear ring; a flip shaft is also movably installed on the hanging plate, a flip gear intermittently meshing with the gear ring and the internal gear is installed on the inner side of the flip shaft, and a flip cylinder is fixedly provided on the other side of the flip shaft; two groups of mutually cooperating tooth plates are slidably provided on the detection plate, a positioning frame is fixedly provided at the bottom of the tooth plate, and bearings to be tested are installed in both the flip cylinder and the positioning frame.

[0007] As a further solution of the present invention: a rotating motor is also installed on the outer side of the first vertical plate, the output end of the rotating motor passes through the first vertical plate, and the end of the output end of the rotating motor is provided with a driving arm that cooperates with the swing frame; the output end of the rotating motor is connected to the flip shaft through a belt.

[0008] As a further solution of the present invention: a threaded cover is installed on one side of the positioning frame, a symmetrical sliding groove is opened on the detection plate, and the tooth plate is slidably arranged in the sliding groove; a linkage gear is also arranged at the bottom of the detection plate, and the linkage gear is meshed with the tooth plates on both sides.

[0009] As a further solution of the present invention: a support plate is also provided at the bottom of the detection plate, a motion motor is installed at the bottom of the support plate, an engagement frame is fixedly provided at the bottom of one group of the tooth plates, and a swing arm cooperating with the engagement frame is provided at the output end of the motion motor.

[0010] As a further solution of the present invention: arc plates located on both sides of the detection plate are also arranged on both sides of the detection frame, a fan is installed on the back of the arc plate, and multiple groups of nozzles with different angles are arranged on the inner wall of the arc plate.

[0011] As a further solution of the present invention: the gear ring is provided with external meshing teeth, and the internal gear is provided with internal meshing teeth; the external meshing teeth occupy half of the gear ring, and the internal meshing teeth occupy half of the internal gear, and the positions of the external meshing teeth and the internal meshing teeth are opposite.

[0012] As a further solution of the present invention: an outer limit ring is arranged on the inner wall of the turning cylinder, and a first detection cavity is formed between the outer limit ring and the side wall of the turning cylinder; a positioning cylinder is installed on the second vertical plate, and a sealing cover that cooperates with the turning cylinder is fixedly arranged on the output end of the positioning cylinder; a positioning seat is arranged in the middle part of the sealing cover, and an inner limit ring is arranged on the outer wall of the positioning seat, and a second detection cavity is formed between the inner limit ring and the side wall of the sealing cover.

[0013] As a further solution of the present invention: a pressure pump is installed on the turning cylinder, a sensor 1 is arranged on the side wall of the turning cylinder, and a sensor 2 is also arranged on the side wall of the sealing cover.

[0014] As a further solution of the present invention: a symmetrical first clamping cavity is opened in the middle part of the turning cylinder, and a symmetrical support frame is fixedly arranged on the outer wall of the turning cylinder; a clamping cylinder is installed on the outer side of the support frame, and an outer clamping plate that passes through the first clamping cavity is arranged at the output end of the clamping cylinder; a symmetrical second clamping cavity is opened in the middle part of the positioning seat, and a double-axis cylinder is arranged inside the positioning seat, and an inner clamping plate that passes through the second clamping cavity is arranged at the output end of the double-axis cylinder.

[0015] As a further solution of the present invention: a control panel is also provided on the outer wall of the detection frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can drive the driving fan to swing back and forth by the cooperation of the driving arm and the swing frame, thereby driving the detection plate to swing back and forth. Driven by the motion motor, the toothed plates on both sides reciprocate along the slide groove. Thus, the bearing to be tested can be slid back and forth synchronously while swinging left and right, and cooperate with the multi-angle nozzles on both sides to detect the stability and strength of the bearing to be tested. This design improves the degree of freedom and detection effect of the matching bearing test equipment.

[0018] 2. The present invention can fix, clamp and rotate the bearing to be tested through the cooperation of the flip cylinder and the sealing cover. When the rotating motor drives the gear ring and the inner gear to rotate through the belt, the outer meshing teeth and the inner meshing teeth can drive the flip gear and the bearing to be tested to intermittently reverse and rotate, thereby simulating the sealing effect in the high-intensity rotation mode. When the inner meshing teeth on the inner gear mesh with the flip gear, the flip cylinder drives the bearing to be tested to rotate one circle clockwise. When the outer meshing teeth on the gear ring mesh with the flip gear, the bearing to be tested rotates two circles counterclockwise. And while rotating, sensor 1 and sensor 2 will monitor the pressure on both sides of the bearing to be tested in real time, thereby detecting the sealing effect of the bearing. This design improves the automation level and detection efficiency of the matching bearing test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 It is a three-dimensional structural diagram of the detection frame in the present invention;

[0022] Figure 3 It is an internal three-dimensional structure diagram of the present invention;

[0023] Figure 4 It is a three-dimensional structural diagram of the gear ring in the present invention;

[0024] Figure 5 is a cross-sectional view of the turning cylinder in the present invention;

[0025] Figure 6 It is a three-dimensional structural diagram of the turning cylinder in the present invention;

[0026] Figure 7 It is a three-dimensional structural diagram of the sealing cover in the present invention;

[0027] Figure 8 is a cross-sectional view of the flip cylinder and the sealing cover of the present invention;

[0028] Fig. 9 is a three-dimensional structural diagram of the bearing to be tested in the present invention;

[0029] Fig.10 The three-dimensional structure of the detection board in the present invention Figure 1 ;

[0030] Fig.11 The three-dimensional structure of the detection board in the present invention Figure 2 .

[0031] Description of reference numerals:

[0032] 1. Detection frame; 2. First vertical plate; 3. Second vertical plate; 4. Horizontal plate; 5. Swing plate; 6. Suspension plate; 7. Active swing shaft; 8. Driving fan; 9. Swing frame; 10. Rotating motor; 11. Driving arm; 12. Rotating shaft; 13. Gear ring; 14. Internal gear; 15. External meshing teeth; 16. Internal meshing teeth; 17. Belt; 18. Driven swing shaft; 19. Swing gear; 20. Detection plate; 21. Slide; 22. Gear plate; 23. Positioning frame; 24. Threaded cover; 25. Linkage gear; 26. Support plate; 27. Motion motor; 28. Meshing frame; 29 , swing arm; 30, arc plate; 31, fan; 32, nozzle; 33, control panel; 34, flip shaft; 35, flip gear; 36, flip cylinder; 37, outer limit ring; 38, first detection chamber; 39, pressure pump; 40, sensor one; 41, first clamping chamber; 42, clamping cylinder; 43, outer clamping plate; 44, bearing to be tested; 45, positioning cylinder; 46, sealing cover; 47, positioning seat; 48, inner limit ring; 49, second detection chamber; 50, sensor two; 51, double-axis cylinder; 52, second clamping chamber; 53, inner clamping plate; 54, support frame. DETAILED DESCRIPTION

[0033] The following will be combined with the attached Figures 1 to 11 The technical solution of the present invention is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention provides a bearing test device for a helicopter rotor system through improvement. Figure 1-Figure 11As shown, the detection frame 1 includes a first vertical plate 2 and a second vertical plate 3 on both sides, and a horizontal plate 4 is arranged on the top of the first vertical plate 2 and the second vertical plate 3; a swing plate 5 is fixedly arranged on the inner side of the first vertical plate 2, and a hanging plate 6 is fixedly arranged on the bottom of the horizontal plate 4; an active swing shaft 7 is rotatably arranged in the middle of the first vertical plate 2, a driving fan 8 is fixedly arranged on the inner side of the active swing shaft 7, and a swing frame 9 facing downward is arranged in the middle of the active swing shaft 7; a driven swing shaft 18 is movably arranged between the swing plate 5 and the second vertical plate 3, and a swing gear 19 meshing with the driving fan 8 is arranged on one side of the driven swing shaft 18, and the driven swing A detection plate 20 is provided in the middle of the shaft 18; a rotating shaft 12 is also rotatably provided on the first vertical plate 2, a gear ring 13 is fixedly provided on the inner side of the rotating shaft 12, and an internal gear 14 is fixedly provided in the middle of the gear ring 13; a flip shaft 34 is also movably installed on the hanging plate 6, a flip gear 35 intermittently meshing with the gear ring 13 and the internal gear 14 is installed on the inner side of the flip shaft 34, and a flip cylinder 36 is fixedly provided on the other side of the flip shaft 34; two groups of mutually cooperating tooth plates 22 are slidably provided on the detection plate 20, a positioning frame 23 is fixedly provided at the bottom of the tooth plate 22, and bearings 44 to be tested are installed in both the flip cylinder 36 and the positioning frame 23.

[0035] In this embodiment: the supporting bearing test equipment for helicopter rotor system is mainly divided into three parts: detection plate 20, turning cylinder 36 and sealing cover 46. When the equipment is used, firstly, the bearing 44 to be tested is placed in the positioning frame 23 and the turning cylinder 36, and then the positioning cylinder 45 is started and the bearing 44 to be tested is positioned and installed through the threaded cover 24. When the positioning cylinder 45 drives the sealing cover 46 to move inward, the positioning seat 47 extends into the middle of the bearing 44 to be tested, and the outer limit ring 37 and the inner limit ring 48 are limited and sealed on the outer ring and the inner ring of the bearing 44 to be tested, and then the clamping cylinder 42 and the double-axis cylinder 51 are started to clamp and fix the outer ring and the inner ring of the bearing 44 to be tested respectively. Finally, the rotating motor 10 and the motion motor 27 are started. When the rotating motor 10 is started, the driving fan 8 drives the driven swing shaft 18 and the detection plate 20 to swing back and forth. At the same time, under the drive of the belt 17, the ring gear 13 and the inner gear 14 will also drive the bearing 44 to be tested to rotate intermittently. Driven by the motion motor 27, the tooth plates 22 on both sides reciprocate along the slide slots 21, so that the bearing 44 to be tested can be swung left and right and can also be slid back and forth synchronously, and can cooperate with the multi-angle nozzles 32 on both sides to detect the stability and strength of the bearing 44 to be tested.

[0036] When the rotating motor 10 drives the ring gear 13 and the inner gear 14 to rotate through the belt 17, the outer meshing teeth 15 and the inner meshing teeth 16 can drive the flip gear 35 and the bearing to be tested 44 to rotate intermittently in reverse, thereby simulating the sealing effect in the high-intensity rotation mode. When the inner meshing teeth 16 on the inner gear 14 mesh with the flip gear 35, the flip cylinder 36 drives the bearing to be tested 44 to rotate one circle clockwise. When the outer meshing teeth 15 on the ring gear 13 mesh with the flip gear 35, the bearing to be tested 44 rotates two circles counterclockwise. And while rotating, sensor 1 40 and sensor 2 50 will monitor the pressure on both sides of the bearing to be tested 44 in real time, thereby detecting the sealing effect of the bearing.

[0037] See attached Figure 1 -Attached Figure 2 A rotating motor 10 is also installed on the outer side of the first vertical plate 2. The output end of the rotating motor 10 passes through the first vertical plate 2. A driving arm 11 that cooperates with the swing frame 9 is provided at the end of the output end of the rotating motor 10. The output end of the rotating motor 10 is connected to the flip shaft 34 through a belt 17.

[0038] In this embodiment, when the rotary motor 10 is started, the driving fan 8 is driven to swing back and forth with the cooperation of the driving arm 11 and the swing frame 9, thereby driving the driven swing shaft 18 and the detection plate 20 to swing back and forth. At the same time, driven by the belt 17, the rotary motor 10 also drives the ring gear 13 and the internal gear 14 to rotate.

[0039] See attached Fig.10 -Attached Fig.11 A threaded cover 24 is installed on one side of the positioning frame 23, and a symmetrical slide groove 21 is opened on the detection plate 20, and the tooth plate 22 is slidably set in the slide groove 21; a linkage gear 25 is also provided at the bottom of the detection plate 20, and the linkage gear 25 is engaged with the tooth plates 22 on both sides.

[0040] In this embodiment, in order to ensure that the nozzle 32 blows the bearing 44 to be tested, a plurality of groups of air-permeable groove structures are provided on the positioning frame 23 and the threaded cover 24 .

[0041] See attached Fig.10 -Attached Fig.11 A support plate 26 is also provided at the bottom of the detection plate 20, and a motion motor 27 is installed at the bottom of the support plate 26. An engagement frame 28 is fixedly provided at the bottom of one set of tooth plates 22, and a swing arm 29 cooperating with the engagement frame 28 is provided at the output end of the motion motor 27.

[0042] In this embodiment, in order to synchronously drive the tooth plates 22 on both sides to reciprocate along the slide slot 21, a motion motor 27 is designed. Under the linkage cooperation of the swing arm 29 and the meshing frame 28, the motion motor 27 drives one set of tooth plates 22 to reciprocate. Under the linkage engagement of the linkage gear 25, the other set of tooth plates 22 also reciprocates along the slide slot 21.

[0043] See attached Figure 1 -Attached Figure 2 The detection frame 1 is also provided with arc plates 30 on both sides of the detection plate 20, a fan 31 is installed on the back of the arc plate 30, and a plurality of groups of nozzles 32 with different angles are arranged on the inner wall of the arc plate 30.

[0044] In this embodiment, when the helicopter rotor system is working, the bearing will encounter complex wind directions. In order to cooperate with the detection plate 20 to blow the bearing 44 to be tested in the positioning frame 23, multiple groups of nozzles 32 with different angles are designed.

[0045] See attached Figure 3 -Attached Figure 4 The ring gear 13 is provided with external meshing teeth 15, and the internal gear 14 is provided with internal meshing teeth 16; the external meshing teeth 15 occupy half of the ring gear 13, and the internal meshing teeth 16 occupy half of the internal gear 14, and the positions of the external meshing teeth 15 and the internal meshing teeth 16 are opposite.

[0046] In this embodiment: the diameter of the inner gear 14 is twice that of the flip gear 35, and the diameter of the ring gear 13 is four times that of the flip gear 35. Under the linkage of the belt 17, the output end of the rotating motor 10 rotates one circle, and the detection plate 20 swings twice, thereby realizing synchronous detection of multiple detection modes. When the inner meshing teeth 16 on the inner gear 14 are engaged with the flip gear 35, the flip cylinder 36 drives the bearing 44 to be tested to rotate clockwise. Since the inner meshing teeth 16 account for half of the inner gear 14, the bearing 44 to be tested will rotate one circle. When the outer meshing teeth 15 on the ring gear 13 are engaged with the flip gear 35, the bearing 44 to be tested will rotate counterclockwise. Since the outer meshing teeth 15 account for half of the ring gear 13, the bearing 44 to be tested will rotate two circles.

[0047] See attached Figure 5 -Attached Figure 8, an outer limit ring 37 is arranged on the inner wall of the turning cylinder 36, and a first detection cavity 38 is formed between the outer limit ring 37 and the side wall of the turning cylinder 36; a positioning cylinder 45 is installed on the second vertical plate 3, and a sealing cover 46 matching the turning cylinder 36 is fixedly arranged at the output end of the positioning cylinder 45; a positioning seat 47 is arranged in the middle of the sealing cover 46, and an inner limit ring 48 is arranged on the outer wall of the positioning seat 47, and a second detection cavity 49 is formed between the inner limit ring 48 and the side wall of the sealing cover 46. A pressure pump 39 is installed on the turning cylinder 36, a sensor 1 40 is arranged on the side wall of the turning cylinder 36, and a sensor 2 50 is also arranged on the side wall of the sealing cover 46.

[0048] In this embodiment: During the detection operation, in order to synchronously detect the sealing performance of the bearing 44 to be tested, an outer limit ring 37 and an inner limit ring 48 that cooperate with each other are designed. The outer limit ring 37 limits and fixes the outer ring of the bearing 44 to be tested, and the inner limit ring 48 limits and fixes the inner ring of the bearing 44 to be tested. During the detection, high-pressure gas is injected into the first detection chamber 38 by the pressure pump 39 and the first detection chamber 38 is maintained at a predetermined pressure. If the pressures of sensor 1 40 and sensor 2 50 remain stable and unchanged, it indicates that the sealing performance of the bearing 44 to be tested is good. If sensor 2 50 detects that the pressure in the second detection chamber 49 rises, it indicates that the bearing 44 to be tested is damaged and has poor sealing performance.

[0049] See attached Figure 5 -Attached Figure 7 A symmetrical first clamping cavity 41 is provided in the middle of the turning cylinder 36, and a symmetrical support frame 54 is fixedly arranged on the outer wall of the turning cylinder 36; a clamping cylinder 42 is installed on the outer side of the support frame 54, and an outer clamping plate 43 penetrating the first clamping cavity 41 is provided at the output end of the clamping cylinder 42; a symmetrical second clamping cavity 52 is provided in the middle of the positioning seat 47, and a double-axis cylinder 51 is provided inside the positioning seat 47, and an inner clamping plate 53 penetrating the second clamping cavity 52 is provided at the output end of the double-axis cylinder 51.

[0050] In this embodiment: the sealing cover 46 is fixed relative to the second vertical plate 3 and does not rotate. When the turning cylinder 36 drives the bearing 44 to be tested to rotate intermittently, in order to clamp and fix the inner and outer sides of the bearing 44 to be tested to avoid accidental slipping during testing, a structure of an outer clamping plate 43 and an inner clamping plate 53 that cooperate with each other is designed. The outer clamping plate 43 clamps the bearing 44 to be tested from the outer side, and the inner clamping plate 53 clamps the bearing 44 to be tested from the inner side.

[0051] See attached Figure 1 -Attached Figure 2 A control panel 33 is also provided on the outer wall of the detection frame 1 .

[0052] In this embodiment, in order to control the overall operation of the device, a control panel 33 structure is designed.

[0053] Working principle of the present invention: When the device is used, firstly, the bearing 44 to be tested is placed in the positioning frame 23 and the turning cylinder 36, and then the positioning cylinder 45 is started and the bearing 44 to be tested is positioned and installed through the threaded cover 24. When the positioning cylinder 45 drives the sealing cover 46 to move inward, the positioning seat 47 extends into the middle of the bearing 44 to be tested, and the outer limit ring 37 and the inner limit ring 48 limit the outer ring and the inner ring of the bearing 44 to be tested. Seal, and then start the clamping cylinder 42 and the double-axis cylinder 51 to clamp and fix the outer ring and the inner ring of the bearing 44 to be tested. Finally, start the rotating motor 10 and the motion motor 27. When the rotating motor 10 is started, the driving fan 8 drives the driven swing shaft 18 and the detection plate 20 to swing back and forth. At the same time, under the drive of the belt 17, the gear ring 13 and the inner gear 14 will also drive the bearing 44 to be tested to rotate intermittently. Under the drive of the motion motor 27, the toothed plates 22 on both sides reciprocate along the slide 21. Thereby, the bearing 44 to be tested is swung left and right and simultaneously reciprocated and slid synchronously, and cooperates with the multi-angle nozzles 32 on both sides to detect the stability and strength of the bearing 44 to be tested.

[0054] When the rotating motor 10 drives the gear ring 13 and the inner gear 14 to rotate through the belt 17, the outer meshing teeth 15 and the inner meshing teeth 16 can drive the flip gear 35 and the bearing to be tested 44 to rotate intermittently in reverse direction, thereby simulating the sealing effect in the high-intensity rotation mode. When the inner meshing teeth 16 on the inner gear 14 mesh with the flip gear 35, the flip cylinder 36 drives the bearing to be tested 44 to rotate one circle clockwise. When the outer meshing teeth 15 on the gear ring 13 mesh with the flip gear 35, the bearing to be tested 44 rotates two circles counterclockwise. And while rotating, the sensor 1 40 and the sensor 2 50 will monitor the pressure on both sides of the bearing to be tested 44 in real time, so as to detect the sealing effect of the bearing. If the pressure of the sensor 1 40 and the sensor 2 50 remain stable and unchanged, it indicates that the sealing performance of the bearing to be tested 44 is good. If the sensor 2 50 detects that the pressure in the second detection chamber 49 rises, it indicates that the bearing to be tested 44 is damaged and has poor sealing performance.

[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A bearing test device for a helicopter rotor system, comprising a test frame (1), characterized in that: The detection frame (1) comprises a first vertical plate (2) and a second vertical plate (3) on both sides, wherein a horizontal plate (4) is arranged on the top of the first vertical plate (2) and the second vertical plate (3); a swing plate (5) is fixedly arranged on the inner side of the first vertical plate (2), and a hanging plate (6) is fixedly arranged on the bottom of the horizontal plate (4); An active swing shaft (7) is rotatably arranged in the middle of the first vertical plate (2), a driving fan (8) is fixedly arranged on the inner side of the active swing shaft (7), and a swing frame (9) facing downward is arranged in the middle of the active swing shaft (7); a driven swing shaft (18) is movably arranged between the swing plate (5) and the second vertical plate (3), a swing gear (19) meshing with the driving fan (8) is arranged on one side of the driven swing shaft (18), and a detection plate (20) is arranged in the middle of the driven swing shaft (18); a rotating shaft (12) is also rotatably arranged on the first vertical plate (2), a gear ring (13) is fixedly arranged on the inner side of the rotating shaft (12), and an internal gear (14) is fixedly arranged in the middle of the gear ring (13); The hanging plate (6) is also movably provided with a turning shaft (34), the inner side of which is provided with a turning gear (35) intermittently meshing with the gear ring (13) and the inner gear (14), and the other side of which is fixedly provided with a turning cylinder (36); two sets of toothed plates (22) cooperating with each other are slidably provided on the detection plate (20), a positioning frame (23) is fixedly provided at the bottom of the toothed plate (22), and the bearing (44) to be tested is installed in both the turning cylinder (36) and the positioning frame (23); A support plate (26) is also provided at the bottom of the detection plate (20), and a motion motor (27) is installed at the bottom of the support plate (26). An engagement frame (28) is fixedly provided at the bottom of one group of the tooth plates (22), and a swing arm (29) cooperating with the engagement frame (28) is provided at the output end of the motion motor (27).

2. The supporting bearing test equipment for a helicopter rotor system according to claim 1, characterized in that: A rotating motor (10) is also installed on the outer side of the first vertical plate (2); the output end of the rotating motor (10) passes through the first vertical plate (2); a driving arm (11) cooperating with the swing frame (9) is provided at the end of the output end of the rotating motor (10); the output end of the rotating motor (10) is connected to the flip shaft (34) via a belt (17).

3. The supporting bearing test equipment for a helicopter rotor system according to claim 1, characterized in that: A threaded cover (24) is installed on one side of the positioning frame (23); a symmetrical sliding groove (21) is provided on the detection plate (20), and the tooth plate (22) is slidably arranged in the sliding groove (21); a linkage gear (25) is also arranged at the bottom of the detection plate (20), and the linkage gear (25) is meshed with the tooth plates (22) on both sides.

4. The supporting bearing test equipment for a helicopter rotor system according to claim 1, characterized in that: The detection frame (1) is also provided with arc plates (30) located on both sides of the detection plate (20), a fan (31) is installed on the back of the arc plate (30), and a plurality of groups of nozzles (32) with different angles are arranged on the inner wall of the arc plate (30).

5. A supporting bearing test equipment for a helicopter rotor system according to any one of claims 1 to 4, characterized in that: The gear ring (13) is provided with external meshing teeth (15), and the internal gear (14) is provided with internal meshing teeth (16); the external meshing teeth (15) occupy half of the gear ring (13), and the internal meshing teeth (16) occupy half of the internal gear (14); the positions of the external meshing teeth (15) and the internal meshing teeth (16) are opposite.

6. A bearing test device for a helicopter rotor system according to any one of claims 1 to 4, characterized in that: An outer limiting ring (37) is arranged on the inner wall of the turning cylinder (36), and a first detection cavity (38) is formed between the outer limiting ring (37) and the side wall of the turning cylinder (36); a positioning cylinder (45) is installed on the second vertical plate (3), and a sealing cover (46) matching with the turning cylinder (36) is fixedly arranged at the output end of the positioning cylinder (45); a positioning seat (47) is arranged in the middle part of the sealing cover (46), and an inner limiting ring (48) is arranged on the outer wall of the positioning seat (47), and a second detection cavity (49) is formed between the inner limiting ring (48) and the side wall of the sealing cover (46).

7. The supporting bearing test equipment for a helicopter rotor system according to claim 6, characterized in that: A pressure pump (39) is installed on the turning cylinder (36), a sensor 1 (40) is arranged on the side wall of the turning cylinder (36), and a sensor 2 (50) is also arranged on the side wall of the sealing cover (46).

8. The supporting bearing test equipment for a helicopter rotor system according to claim 6, characterized in that: A symmetrical first clamping cavity (41) is provided in the middle of the turning cylinder (36), and a symmetrical support frame (54) is fixedly arranged on the outer wall of the turning cylinder (36); a clamping cylinder (42) is installed on the outer side of the support frame (54), and an outer clamping plate (43) penetrating the first clamping cavity (41) is provided at the output end of the clamping cylinder (42); a symmetrical second clamping cavity (52) is provided in the middle of the positioning seat (47), and a double-axis cylinder (51) is provided inside the positioning seat (47), and an inner clamping plate (53) penetrating the second clamping cavity (52) is provided at the output end of the double-axis cylinder (51).

9. A bearing test device for a helicopter rotor system according to any one of claims 1 to 4, characterized in that: A control panel (33) is also provided on the outer wall of the detection frame (1).

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