Bearing loading test bench

Abstract

The utility model provides a bearing loading test bench. The device comprises a test platform, a rack, a bearing mounting seat, a test shaft, a loading bearing, an axial compression bar and a radial compression bar. The test platform is horizontally arranged, and the bearing mounting seat is arranged on the test platform; the test shaft is vertically arranged on the test platform, and the loading bearing is assembled at the upper end part of the test bearing; the axial compression bar applies a load to the loading bearing along the direction parallel to the axis of the test shaft; the radial compression bar applies load to the loading bearing along the radial direction of the loading bearing; during a test, the test bearing is assembled on the test shaft and is connected with the inner wall of the bearing mounting seat. According to the embodiment, the lift force and the bending moment of the rotor wing are simulated through the two vertical axial loading cylinders, the pneumatic radial force of the rotor wing is simulated through the two radial loading cylinders which are perpendicular to each other, the real working state of rotor wing shaft bearing installation operation can be simulated, and the test accuracy and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing performance test technical field especially a bearing loading test bench. BACKGROUND

[0002] In the related art, the fatigue test of the helicopter rotor shaft vertical bearing is generally carried out by using the bearing loading test bench, and accurately simulating the real load and real movement of the rotor shaft vertical bearing in the working process is the prerequisite for accurately evaluating the fatigue life of the rotor shaft vertical bearing. However, the existing bearing loading test device is generally horizontally arranged, that is, the test bearing is installed on the test shaft arranged horizontally, so that it is difficult to simulate the real stress state of the test bearing, the reliability of the test data is poor, and the test result error is large. Therefore, it is necessary to provide a bearing loading test bench to overcome the defects in the prior art. SUMMARY

[0003] The utility model provides a bearing loading test bench.

[0004] According to one aspect of the utility model, a bearing loading test bench is provided, which comprises: a test platform, the test platform is horizontally arranged; a bearing mounting seat, the bearing mounting seat is arranged on the test platform; a test shaft, the test shaft is vertically arranged on the test platform, and the lower end of the test shaft is located inside the bearing mounting seat; a loading bearing, the loading bearing is assembled on the upper end of the test bearing; an axial compression rod, the axial compression rod comprises a first axial compression rod and a second axial compression rod which are located on the same vertical plane as the axis of the loading bearing and are respectively located on both sides of the loading bearing, the first axial compression rod applies a load to the loading bearing along the direction parallel to the axis of the test shaft, and the second axial compression rod applies a load to the loading bearing along the direction parallel to the axis of the test shaft; a radial compression rod, the radial compression rod comprises a first radial compression rod and a second radial compression rod which are located on the radial extension line of the radial compression rod and are distributed at right angles, the first radial compression rod applies a load to the loading bearing along the radial direction of the loading bearing, and the second radial compression rod applies a load to the loading bearing along the radial direction of the loading bearing; during the test, the test bearing is assembled on the test shaft and connected with the inner wall of the bearing mounting seat, the first axial compression rod and the second axial compression rod simulate the lift and bending moment in the vertical direction that the test bearing bears, and the first radial compression rod and the second radial compression rod simulate the aerodynamic radial force in the horizontal direction that the test bearing bears.

[0005] Preferably, a rotating device is arranged below the test platform, and the test shaft is drivingly connected with the rotating device through the test platform.

[0006] Preferably, the test bearing comprises a first test bearing and a second test bearing, the first test bearing is a double-row ball bearing, the second test bearing is a roller bearing, and the loading bearing is a double-row roller bearing.

[0007] Preferably, the inner wall of the bearing mounting seat is provided with a first annular boss and a second annular boss, a first bushing is arranged outside the first test bearing, the inner ring of the first bushing is connected with the first test bearing in a matched mode, the outer side of the first bushing is provided with a first clamping groove matched with the first annular boss, a second bushing is arranged outside the second test bearing, the inner ring of the second bushing is connected with the second test bearing in a matched mode, and the outer side of the second bushing is provided with a second clamping groove matched with the second annular boss.

[0008] Preferably, the outer side of the bearing mounting seat is provided with a first oil injection oil channel and a second oil injection oil channel, the first oil injection oil channel extends to the first test bearing, and the second oil injection oil channel extends to the second test bearing.

[0009] Preferably, the outer side of the loading bearing is provided with a connecting seat matched with the loading bearing, the connecting seat comprises a sleeve part, two connecting parts arranged on both sides of the sleeve part and hinged with a first axial pressing rod and a second axial pressing rod respectively, a first pressing plate part arranged on the upper end of the sleeve part, and a second pressing plate part arranged on the lower end of the sleeve part.

[0010] Preferably, the bearing loading test bench further comprises a rack, the first axial pressing rod is connected with a first telescopic actuator, the second axial pressing rod is connected with a second telescopic actuator, and the first telescopic actuator and the second telescopic actuator are hinged to the top of the rack.

[0011] Preferably, one end of the first radial pressing rod is hinged with the side surface of the sleeve part, the other end of the first radial pressing rod is connected with a third telescopic actuator, one end of the second radial pressing rod is hinged with the connecting part, the other end of the second radial pressing rod is connected with a fourth telescopic actuator, and the third telescopic actuator and the fourth telescopic actuator are hinged to the side surface of the rack.

[0012] Preferably, a first elastic pull rod and a second elastic pull rod are vertically arranged between the rack and the first pressing plate, and a third elastic pull rod and a fourth elastic pull rod are horizontally arranged between two adjacent sleeve parts.

[0013] Preferably, a third oil injection oil channel is arranged on the sleeve part, and the third oil injection oil channel extends to the loading bearing.

[0014] Compared with the prior art, the bearing loading test bench has the following beneficial effects:

[0015] The utility model discloses a vertical axial loading cylinder simulates the lift and bending moment of the rotor, two mutually perpendicular radial loading cylinders simulate the aerodynamic radial force of the rotor, realize the equivalent loading of the rotor aerodynamic load, and the vertical layout can simulate the lubrication state of the bearing, and the bearing test model is used as the basis, the actual working condition (such as speed, load, lubrication condition and temperature etc.) of the bearing can be simulated, and the accuracy and reliability of the test are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further explained in detail in connection with the drawings and specific embodiment:

[0017] Figure 1 It is the structure schematic drawing of loading test device in the utility model;

[0018] Figure 2 It is the structure schematic drawing of loading test device in the utility model;

[0019] Figure 3 It is the sectional view of loading test device in the utility model in one vertical direction, the partial close -up drawing of loading bearing, the partial close -up drawing of first test bearing and the partial close -up drawing of second test bearing;

[0020] Figure 4 It is the sectional view of loading test device in the utility model in another vertical direction.

[0021] Mark explanation:

[0022] 1, test platform;

[0023] 2, bearing mounting seat;21, first annular boss;22, second annular boss;23, first oil injection oil channel;24, second oil injection oil channel;

[0024] 3, test shaft;31, first shaft;32, second shaft;33, connecting piece;

[0025] 4, loading bearing;41, connecting seat;411, sleeve portion;412, connecting portion;413, first pressing plate portion;414, second pressing plate portion;415, third oil injection oil channel;

[0026] 51, first axial pressing rod;511, first telescopic actuator;512, first elastic pull rod;52, second axial pressing rod;521, second telescopic actuator;522, second elastic pull rod;

[0027] 61, first radial pressing rod;611, third telescopic actuator;612, third elastic pull rod;62, second radial pressing rod;621, fourth telescopic actuator;622, fourth elastic pull rod;

[0028] 71. first test bearing; 711. first bushing; 712. first clamping slot; 72. second test bearing; 721. second bushing; 722. second clamping slot;

[0029] 8. Rotating device.

[0030] 9. Frame. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0032] In order to make the drawing simple, only the parts related to the present application are shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0033] It should be further understood that the term "and / or" used in the specification and claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0034] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will describe the specific embodiments of the present application with reference to the drawings. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0037] Referring to the drawings Figures 1 to 4 The embodiment provides a loading test bench for a vertical bearing of a rotor shaft of a helicopter, and the loading test bench comprises a test platform 1, a rack 9, a bearing mounting seat 2, a test shaft 3, a loading bearing 4, an axial pressing rod and a radial pressing rod.

[0038] Referring to the drawings Figure 1 The test platform 1 is horizontally arranged, and a horizontal plane is parallel to or coincides with a plane where the test platform 1 is located, and a vertical plane is perpendicular to the plane where the test platform 1 is located. The bearing mounting seat 2 is arranged on the test platform 1, and the lower end of the test shaft 3 is located inside the bearing mounting seat 2, and the bearing mounting seat 2 is used for mounting a test bearing. The loading bearing 4 is assembled at the upper end of the test shaft 3, the axial pressing rod is assembled on the loading bearing 4, and a load is applied to the loading bearing 4 along the direction parallel to the axis of the test shaft 3; and the radial pressing rod is assembled on the loading bearing 4, and a load is applied to the loading bearing 4 along the radial direction of the loading bearing 4. In the embodiment, the vertical layout of the test shaft 3 can simulate the lubrication state of the bearing, and the problem that the difference between the test of the rotor shaft bearing and the actual service condition is large is solved.

[0039] Referring to the drawings Figure 2 The test shaft 3 comprises a first shaft 31, a second shaft 32 and a connecting piece 33 connecting the first shaft 31 and the second shaft 32, and the test shaft 3 is designed as a split structure, so that the installation of the test shaft is facilitated, and the assembly efficiency of the test shaft is improved. Similarly, for those skilled in the art, the test shaft can also be of an integrated structure, and the integrated structure has stronger structural strength and can improve the service life of the test bench.

[0040] Referring to the drawings Figure 2 A rotating device 8 is arranged below the test platform 1, and the test shaft 3 is in transmission connection with the rotating device 8 through the test platform 1. The rotating device 8 can be an actuator such as an engine or a motor, and in the embodiment, the rotating device 8 is preferably a motor, which can simulate the rotation of the rotor and more truly simulate the bearing in the actual service condition.

[0041] Referring to the drawings Figure 3 The outer side of the loading bearing 4 is provided with a connecting seat 41 matched with the loading bearing 4, and the connecting seat 41 comprises a sleeve portion 411, two connecting portions 412 arranged on both sides of the sleeve portion 411 and respectively hinged with a first axial pressing rod 51 and a second axial pressing rod 52, a first pressing plate portion 413 arranged on the upper end of the sleeve portion 411 and a second pressing plate portion 414 arranged on the lower end of the sleeve portion 411.

[0042] Referring to the drawings Figures 2 to 4The axial compression rods include a first axial compression rod 51 and a second axial compression rod 52 which are located in the same vertical plane as the axis of the loading bearing 4 and are respectively located on both sides of the loading bearing 4, the first axial compression rod 51 is connected with a first telescopic actuator 511, and the second axial compression rod 52 is connected with a second telescopic actuator 521, the first telescopic actuator 511 and the second telescopic actuator 521 are hinged to the top of the rack 9, the first axial compression rod 51 applies a load to the loading bearing 4 along the direction parallel to the axis of the test shaft 3, and the second axial compression rod 52 applies a load to the loading bearing 4 along the direction parallel to the axis of the test shaft 3.

[0043] The radial compression rods include a first radial compression rod 61 and a second radial compression rod 62 which are located on the radial extension line of the radial compression rods and are distributed at right angles, one end of the first radial compression rod 61 is hinged to the side surface of the sleeve part 411, the other end of the first radial compression rod 61 is connected with a third telescopic actuator 611, one end of the second radial compression rod 62 is hinged to the connecting part 412, the other end of the second radial compression rod 62 is connected with a fourth telescopic actuator 621, the third telescopic actuator 611 and the fourth telescopic actuator 621 are hinged to the side surface of the rack 9, the first radial compression rod 61 applies a load to the loading bearing 4 along the radial direction of the loading bearing 4, and the second radial compression rod 62 applies a load to the loading bearing 4 along the radial direction of the loading bearing 4. The first telescopic actuator 511, the second telescopic actuator 521, the third telescopic actuator 611 and the fourth telescopic actuator 621 are electric cylinders or hydraulic cylinders, and both push and pull bidirectional loading can be achieved.

[0044] In addition, the first elastic pull rod 512 and the second elastic pull rod 522 are vertically arranged between the rack 9 and the first pressing plate, and the third elastic pull rod 612 and the fourth elastic pull rod 622 are horizontally arranged between the sleeve part 411 and the two adjacent sleeve parts 411.

[0045] Referring to the drawings Figure 3The loading device in the embodiment can simultaneously test multiple sets of bearings of the rotor shaft, specifically, the test shaft includes a first test bearing 71 and a second test bearing 72, the first test bearing 71 is a double-row ball bearing, the second test bearing 72 is a roller bearing, and the loading bearing 4 is a double-row roller bearing. Correspondingly, the inner wall of the bearing mounting seat 2 is provided with a first annular boss 21 and a second annular boss 22, a first bushing 711 is arranged outside the first test bearing 71, the inner ring of the first bushing 711 is connected with the first test bearing 71, a first clamping groove 712 is arranged outside the first bushing 711 and connected with the first annular boss 21, a second bushing 721 is arranged outside the second test bearing 72, the inner ring of the second bushing 721 is connected with the second test bearing 72, a second clamping groove 722 is arranged outside the second bushing 721 and connected with the second annular boss 22. In this way, the loading device in the embodiment can simultaneously test multiple sets of bearings of the rotor shaft, and the test efficiency is higher. In other embodiments, the number and type of test shafts and the assembly relationship can be adjusted.

[0046] The outer side of the bearing mounting seat 2 is provided with a first oil injection channel 23 and a second oil injection channel 24, the first oil injection channel 23 extends to the first test bearing 71, and the second oil injection channel 24 extends to the second test bearing 72. The sleeve part 411 is provided with a third oil injection channel 415, and the third oil injection channel 415 extends to the loading bearing 4. The lubrication state of the bearing can be truly simulated, and the problem that the rotor shaft bearing test and the actual service condition have a large gap can be solved.

[0047] During the test, the test bearing is assembled on the test shaft 3 and connected with the inner wall of the bearing mounting seat 2, the first axial pressing rod 51 and the second axial pressing rod 52 simulate the vertical lift and bending moment of the test bearing, and the first radial pressing rod 61 and the second radial pressing rod 62 simulate the horizontal aerodynamic radial force of the test bearing, so that the equivalent loading of the rotor aerodynamic load can be realized, the real working state of the rotor shaft bearing during the running-in operation can be simulated, and the accuracy and reliability of the bearing test are improved.

[0048] It is obvious for those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the utility model without departing from the spirit and scope of the utility model. Therefore, it is intended to cover modifications and variations of the utility model falling within the scope of the appended claims and their equivalents.

Claims

1. A bearing loading test rig characterised in that, The application relates to a bearing loading test platform. The test platform is horizontally arranged; A bearing mounting seat is arranged on the test platform; A test shaft is vertically arranged on the test platform, and the lower end of the test shaft is located in the bearing mounting seat; A loading bearing is arranged on the upper end of the test bearing; An axial compression rod includes a first axial compression rod and a second axial compression rod which are located in the same vertical plane as the loading bearing and are respectively located on the two sides of the loading bearing, the first axial compression rod applies a load to the loading bearing along the direction parallel to the test shaft axis, and the second axial compression rod applies a load to the loading bearing along the direction parallel to the test shaft axis; A radial compression rod includes a first radial compression rod and a second radial compression rod which are located on the radial extension line of the radial compression rod and are distributed at right angles, the first radial compression rod applies a load to the loading bearing along the radial direction of the loading bearing, and the second radial compression rod applies a load to the loading bearing along the radial direction of the loading bearing; During the test, the test bearing is arranged on the test shaft and is connected with the inner wall of the bearing mounting seat, the first axial compression rod and the second axial compression rod simulate the vertical lift and bending moment of the test bearing, and the first radial compression rod and the second radial compression rod simulate the horizontal aerodynamic radial force of the test bearing.

2. The bearing loading test stand of claim 1, wherein, A rotating device is arranged below the test platform, and the test shaft is in transmission connection with the rotating device through the test platform.

3. The bearing loading test stand of claim 2, wherein, The test bearing includes a double-row ball bearing as a first test bearing and a roller bearing as a second test bearing, and the loading bearing is a double-row roller bearing.

4. The bearing loading test stand of claim 3, wherein The inner wall of the bearing mounting seat is provided with a first annular boss and a second annular boss, a first bushing is arranged outside the first test bearing, the inner ring of the first bushing is in matched connection with the first test bearing, the outer side of the first bushing is provided with a first clamping groove which is in matched connection with the first annular boss, a second bushing is arranged outside the second test bearing, the inner ring of the second bushing is in matched connection with the second test bearing, the outer side of the second bushing is provided with a second clamping groove which is in matched connection with the second annular boss.

5. The bearing loading test stand of claim 4, wherein, The outer side of the bearing mounting seat is provided with a first oil injection oil channel and a second oil injection oil channel, the first oil injection oil channel extends to the first test bearing, and the second oil injection oil channel extends to the second test bearing.

6. The bearing loading test stand of claim 5, wherein, The outer side of the loading bearing is provided with a connecting seat which is in matched connection with the loading bearing, the connecting seat includes a sleeve part, two connecting parts which are arranged on the two sides of the sleeve part and are respectively hinged with the first axial compression rod and the second axial compression rod, a first pressing plate part which is arranged on the upper end of the sleeve part, and a second pressing plate part which is arranged on the lower end of the sleeve part.

7. The bearing loading test stand of claim 6, wherein The bearing loading test platform further includes a rack, the first axial compression rod is connected with a first telescopic actuator, the second axial compression rod is connected with a second telescopic actuator, and the first telescopic actuator and the second telescopic actuator are hinged on the top of the rack.

8. The bearing loading test stand of claim 7, wherein, The first radial pressing rod is hinged at one end to the side surface of the sleeve part, and connected at the other end to the third telescopic actuator, the second radial pressing rod is hinged at one end to the connecting part, and connected at the other end to the fourth telescopic actuator, and the third telescopic actuator and the fourth telescopic actuator are hinged to the side surface of the frame.

9. The bearing loading test stand of claim 8, wherein, First and second elastic pull rods are vertically arranged between the frame and the first pressing plate, and third and fourth elastic pull rods are horizontally arranged between two adjacent sleeve parts.

10. The bearing loading test stand of claim 9, wherein, A third oil injection channel is arranged on the sleeve part and extends to the loading bearing.

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