A multi-mode adjustable rotor vibration testing device

Abstract

This invention relates to the field of rotor dynamics testing, specifically a multi-mode adjustable rotor vibration testing device. A test bench is movably connected to the upper part of an adjustment box. A first control box is movably connected inside the adjustment box, and an angle adaptation adjustment component is installed within the first control box. The angle adaptation adjustment component includes a first transmission unit and a second transmission unit located within the first control box, a connecting plate movably connected within the first control box, a second control box mounted at the end of the connecting plate, and a rotating plate movably connected inside the second control box. The rotating plate is fixedly connected to the test bench. The first transmission unit drives the connecting plate to rotate, and the connecting plate, through the second control box and the rotating plate, drives the test bench to perform angle adaptation adjustment. The second transmission unit independently drives the rotating plate to rotate, and the rotating plate drives the test bench to perform multi-angle adjustment. By setting a vibration mode adjustment component, the vibration mode of the test bench itself can be switched to simulate the vibration from the aircraft foundation during the actual service of the rotor system.

Description

Technical Field

[0001] This invention relates to the technical field of rotor dynamics testing devices for aviation electromechanical products, specifically a multi-mode adjustable rotor vibration testing device. Background Technology

[0002] A rotor vibration testing device is a specialized instrument used to detect and evaluate the vibration characteristics of rotors in rotating machinery, where rotor vibration is a common fault phenomenon. Excessive vibration can lead to equipment damage, performance degradation, and even safety accidents. Sensors mounted on the rotor are used to measure its vibration signals; common sensors include accelerometers, velocity sensors, and displacement sensors. These sensors convert rotor vibration into electrical signals for subsequent data acquisition and analysis. Testing rotor vibration with a rotor vibration testing device allows for the timely detection and handling of potential vibration problems, ensuring the safe operation of the equipment. Furthermore, it provides reliable data for verifying and optimizing the dynamic design of the rotor system by obtaining the critical speed, mode shape, and steady-state / transient unbalance response within a specific speed range.

[0003] Existing testing devices measure rotor vibration by rotating the rotor on a fixed test bench via a drive mechanism. However, in actual service environments, the rotor system's vibration is influenced by multiple factors, including the installation structure, aircraft foundation vibration, and flight maneuver loads. Operating at various angles and subjected to diverse foundation vibrations, existing testing devices often yield inaccurate results. Therefore, this invention provides a multi-mode adjustable rotor vibration testing device. Summary of the Invention

[0004] Purpose of the invention The purpose of this invention is to address the problem that existing technologies cannot accurately measure the vibration state of rotors under the combined effects of multiple attitude angles and various basic vibrations during service when testing rotor systems of aerospace electromechanical products. Therefore, this invention proposes a multi-mode adjustable rotor vibration testing device.

[0005] Technical solution A multi-mode adjustable rotor vibration testing device includes an adjustment box and a test platform. The test platform is movably connected to the upper part of the adjustment box. A first control box is movably connected inside the adjustment box. An angle adaptation adjustment component is provided inside the first control box. The angle adaptation adjustment component includes a first transmission unit and a second transmission unit disposed inside the first control box, a connecting plate movably connected inside the first control box, a second control box mounted at the end of the connecting plate, and a rotating plate movably connected inside the second control box. The rotating plate is fixedly connected to the test platform. The first transmission unit drives the connecting plate to rotate. The connecting plate drives the test platform to perform angle adaptation adjustment through the second control box and the rotating plate. The second transmission unit drives the rotating plate to rotate independently. The rotating plate drives the test platform to perform multi-angle adjustment. The adjustment box and the first control box are jointly equipped with a vibration mode adjustment component. The vibration mode adjustment component includes a control unit located on the side of the first control box, a square plate movably connected to the inside of the adjustment box, an arc-shaped structure movably connected between the first control box and the square plate, a fixed rod movably connected to the upper part of the square plate, a fifth servo motor mounted on the side of the first control box, and a cam mounted on the output end of the fifth servo motor. The control unit controls the arc-shaped structure to move and connect the first control box and the square plate together. The fifth servo motor starts and drives the cam to rotate. The force generated by the rotation of the cam causes the first control box to vibrate in a horizontal state. The control unit controls the arc-shaped structure to disconnect the first control box and the square plate and controls the fixed rod to move. The fixed rod connects the square plate and the adjustment box. The force generated by the rotation of the cam causes the first control box to vibrate in a vertical state. It can be adapted and adjusted according to the actual use angle of the rotor and can switch its own vibration mode to meet the vibration testing requirements of the rotor in different use scenarios.

[0006] Furthermore, the first transmission unit includes a first servo motor installed inside the first control box, a first worm gear installed at the output end of the first servo motor, a first rotating rod rotatably connected inside the first control box, a first worm wheel installed at the end of the first rotating rod, the first worm wheel meshing with the first worm gear, and a gear installed at the end of the first rotating rod away from the first worm wheel.

[0007] An arc-shaped plate is installed on the inner side of the first control box, and an arc-shaped rack is slidably arranged on the inner side of the arc-shaped plate. The gear meshes with the arc-shaped rack, and when the first rotating rod rotates, it can drive the arc-shaped rack to move along the arc-shaped plate through the gear.

[0008] The second transmission unit includes a second servo motor mounted on the side of the second control box. A second worm gear is mounted on one end of the second servo motor that extends into the inside of the second control box. A second worm wheel is mounted on the side of the rotating plate. The second worm wheel meshes with the second worm. When the second worm rotates, it can drive the rotating plate to rotate through the second worm wheel, thereby driving the test platform to rotate.

[0009] The inner side of the regulating box is provided with a sliding groove, and a sliding block is slidably arranged inside the sliding groove. The sliding block is fixedly connected to the square plate. A first spring is symmetrically installed on the outer side of the sliding block. The end of the first spring away from the sliding block is fixedly connected to the inner wall of the sliding groove. The square plate moves along the sliding groove through the sliding block.

[0010] The size of the sliding groove opening is adapted to the size of the sliding block, and both the sliding groove and the sliding block have convex cross-sections.

[0011] The control unit includes a third servo motor mounted on the side of the first control box. The output end of the third servo motor is equipped with a threaded rod, which is threadedly connected to the arc-shaped structure. The arc-shaped structure is slidably connected to the third servo motor. When the arc-shaped structure moves to the outside of the first fixed groove, the connection between the first control box and the square plate can be released.

[0012] Both the first control box and the square plate have a first fixing groove on their sides, and the size of the opening of the first fixing groove is adapted to the size of the arc-shaped structure.

[0013] A fourth servo motor is installed on the upper part of the square plate. A fixing rod is installed on the output end of the fourth servo motor. A second fixing groove is opened on the inner side of the adjustment box. The size of the opening of the second fixing groove is adapted to the size of the fixing rod. The fixing rod moves to the outside of the second fixing groove and disconnects the square plate from the adjustment box.

[0014] The upper part of the square plate is equipped with multiple telescopic rods and a second spring, and the ends of the telescopic rods and the second springs away from the square plate are fixedly connected to the first control box.

[0015] Technical effect On the one hand, by setting the angle adaptation adjustment component, various attitude angles of the rotor during actual service can be simulated; on the other hand, by setting the vibration mode adjustment component to switch the vibration mode of the test bench itself, the vibration from the aircraft foundation during the actual service of the rotor system can be simulated. The two can be performed simultaneously, thereby testing the vibration of the rotor in service and meeting the vibration testing requirements of the rotor in different usage scenarios. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of an adaptive rotor vibration testing device proposed in this invention. Figure 2 This is a schematic diagram of the overall side structure of the present invention; Figure 3 This is a schematic diagram of the side cross-sectional structure of the adjustment component in this invention; Figure 4 This is a schematic diagram of the internal cross-sectional structure of the adjustment component in this invention; Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 7 for Figure 2 Enlarged schematic diagram of the structure at point C; Figure 8 for Figure 3 Enlarged schematic diagram of the structure at point D; Figure 9 for Figure 4 Enlarged schematic diagram of the structure at point E in the middle.

[0017] In the diagram: 1. Adjustment box; 2. Test bench; 3. First control box; 4. Arc plate; 5. Arc rack; 6. Connecting plate; 7. First rotating rod; 8. Gear; 9. First worm gear; 10. First servo motor; 11. First worm; 12. Second control box; 13. Rotating plate; 14. Second worm gear; 15. Second servo motor; 16. Second worm; 17. Sliding groove; 18. First spring; 19. Sliding block; 20. Square plate; 21. Telescopic rod; 22. Second spring; 23. Third servo motor; 24. Threaded rod; 25. Arc structure; 26. First fixing groove; 27. Fourth servo motor; 28. Fixing rod; 29. ​​Second fixing groove; 30. Fifth servo motor; 31. Cam. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be described in more detail below. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this invention. The embodiments described below with reference to reference are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below.

[0019] Example 1 like Figure 1 - Figure 9 As shown, the present invention proposes an adaptive rotor vibration testing device, including an adjustment box 1 and a test platform 2. The test platform 2 is movably connected to the upper part of the adjustment box 1. A first control box 3 is movably connected inside the adjustment box 1. An angle adaptation adjustment component is provided inside the first control box 3. The angle adaptation adjustment component includes a first transmission unit and a second transmission unit provided inside the first control box 3, a connecting plate 6 movably connected inside the first control box 3, a second control box 12 installed at the end of the connecting plate 6, and a rotating plate 13 movably connected inside the second control box 12. The rotating plate 13 is fixedly connected to the test platform 2. The first transmission unit drives the connecting plate 6 to rotate. The connecting plate 6 drives the test platform 2 to perform angle adaptation adjustment through the second control box 12 and the rotating plate 13. The second transmission unit drives the rotating plate 13 to rotate independently. The rotating plate 13 drives the test platform 2 to perform angle adaptation adjustment. A vibration mode adjustment component is jointly provided on the adjustment box 1 and the first control box 3. The vibration mode adjustment component includes a control unit on the side of the first control box 3, a square plate 20 movably connected to the inside of the adjustment box 1, an arc-shaped structure 25 movably connected between the first control box 3 and the square plate 20, a fixed rod 28 movably connected to the upper part of the square plate 20, a fifth servo motor 30 mounted on the side of the first control box 3, and a cam 31 mounted on the output end of the fifth servo motor 30. The control unit controls the arc-shaped structure 25 to move and connect the first control box 3 and the square plate 20 together. The fifth servo motor 30 starts and drives the cam 31 to rotate. The force generated by the rotation of the cam 31 causes the first control box 3 to vibrate in a horizontal state. The control unit controls the arc-shaped structure 25 to disconnect the first control box 3 and the square plate 20 and controls the fixed rod 28 to move. The fixed rod 28 connects the square plate 20 and the adjustment box 1. The force generated by the rotation of the cam 31 causes the first control box 3 to vibrate in a vertical state. It can be adapted and adjusted according to the actual use angle of the rotor, and its own vibration mode can be switched to meet the vibration testing requirements of the rotor in different use scenarios.

[0020] The first transmission unit includes a first servo motor 10 installed inside the first control box 3, a first worm gear 11 installed at the output end of the first servo motor 10, a first rotating rod 7 rotatably connected inside the first control box 3, a first worm wheel 9 installed at the end of the first rotating rod 7, the first worm wheel 9 meshing with the first worm gear 11, and a gear 8 installed at the end of the first rotating rod 7 away from the first worm wheel 9.

[0021] An arc-shaped plate 4 is installed on the inner side of the first control box 3. An arc-shaped rack 5 is slidably arranged on the inner side of the arc-shaped plate 4. The gear 8 meshes with the arc-shaped rack 5. When the first rotating rod 7 rotates, it can drive the arc-shaped rack 5 to move along the arc-shaped plate 4 through the gear 8.

[0022] The second transmission unit includes a second servo motor 15 mounted on the side of the second control box 12. A second worm gear 16 is mounted on one end of the second servo motor 15 extending into the inside of the second control box 12. A second worm wheel 14 is mounted on the side of the rotating plate 13. The second worm wheel 14 meshes with the second worm gear 16. When the second worm gear 16 rotates, it can drive the rotating plate 13 to rotate through the second worm wheel 14, thereby driving the test bench 2 to rotate.

[0023] In this embodiment, when conducting rotor vibration testing on the test bench 2, if the angle needs to be adjusted according to the actual usage of the rotor, the first servo motor 10 can be started. The first servo motor 10 drives the first worm 11 to rotate. Since the first worm 11 meshes with the first worm wheel 9, the rotation of the first worm 11 can drive the first rotating rod 7 to rotate through the first worm wheel 9. Since the gear 8 meshes with the arc rack 5, the rotation of the first rotating rod 7 can drive the arc rack 5 to move along the arc plate 4 through the gear 8. This, in turn, drives the test bench 2 to rotate through the connecting plate 6, the second control box 12, and the rotating plate 13. The second servo motor 15 can also be started, driving the second worm 16 to rotate. Since the second worm 16 meshes with the second worm wheel 14, the rotation of the second worm 16 can drive the rotating plate 13 to rotate through the second worm wheel 14. This, in turn, drives the test bench 2 to rotate, thereby adjusting the angle of the test bench 2. This allows for vibration testing that can be adjusted according to the actual usage angle of the rotor.

[0024] Example 2 like Figure 1 - Figure 9 As shown, based on Embodiment 1, a sliding groove 17 is provided on the inner side of the regulating box 1. A sliding block 19 is slidably arranged inside the sliding groove 17. The sliding block 19 is fixedly connected to the square plate 20. A first spring 18 is symmetrically installed on the outer side of the sliding block 19. The end of the first spring 18 away from the sliding block 19 is fixedly connected to the inner wall of the sliding groove 17. The square plate 20 moves along the sliding groove 17 through the sliding block 19.

[0025] The size of the opening of the sliding groove 17 is adapted to the size of the sliding block 19, and the cross-sections of both the sliding groove 17 and the sliding block 19 are convex.

[0026] The control unit includes a third servo motor 23 mounted on the side of the first control box 3. A threaded rod 24 is mounted on the output end of the third servo motor 23. The threaded rod 24 is threadedly connected to the arc-shaped structure 25. The arc-shaped structure 25 is slidably connected to the third servo motor 23. The arc-shaped structure 25 can be moved to the outside of the first fixed groove 26 to disconnect the first control box 3 and the square plate 20.

[0027] Both the first control box 3 and the square plate 20 have a first fixing groove 26 on their sides, and the size of the opening of the first fixing groove 26 is adapted to the size of the arc structure 25.

[0028] A fourth servo motor 27 is installed on the upper part of the square plate 20. A fixing rod 28 is installed at the output end of the fourth servo motor 27. A second fixing groove 29 is opened on the inner side of the adjustment box 1. The size of the opening of the second fixing groove 29 is adapted to the size of the fixing rod 28. The fixing rod 28 moves to the outside of the second fixing groove 29 and disconnects the square plate 20 from the adjustment box 1.

[0029] Multiple telescopic rods 21 and a second spring 22 are respectively installed on the upper part of the square plate 20. The ends of the telescopic rods 21 and the second spring 22 away from the square plate 20 are fixedly connected to the first control box 3.

[0030] In this embodiment, when performing rotor vibration testing on the test bench 2, the fourth servo motor 27 can be activated. The fourth servo motor 27 drives the fixed rod 28 to move to the outside of the second fixed groove 29, disconnecting the square plate 20 from the adjustment box 1. At this time, the fifth servo motor 30 can be activated, driving the cam 31 to rotate. The centrifugal force generated by the rotation of the cam 31 drives the first control box 3 and the square plate 20 to move along the sliding groove 17 via the sliding block 19. The first spring 18 supports the first control box 3 and the square plate 20 to move back and forth rapidly, performing horizontal vibration. The fourth servo motor can then be activated. 27. Insert the fixing rod 28 into the second fixing slot 29, and then start the third servo motor 23. The third servo motor 23 drives the threaded rod 24 to rotate. The force generated by the rotation of the threaded rod 24 drives the arc structure 25 to move to the outside of the first fixing slot 26, disconnecting the first control box 3 from the square plate 20. Then start the fifth servo motor 30. The centrifugal force generated by the rotation of the cam 31 drives the first control box 3 to move up and down on the square plate 20 through the extension and retraction of the telescopic rod 21 and the second spring 22, thereby vibrating in a vertical state and adapting to the vibration mode of the rotor in the application scenario.

[0031] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., used in this application description to indicate relative direction or positional relationship are used only to indicate relative orientation or positional relationship, and do not imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, and therefore should not be construed as a limitation on this application. The terms "first," "second," "third," and similar terms used in this application description are used only for descriptive purposes to distinguish different components, and should not be construed as indicating or implying relative importance. The terms "a," "one," or "the," etc., used in this application description should not be construed as an absolute limitation on quantity, but should be construed as indicating the existence of at least one. The terms "including," "comprising," etc., used in this application description mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0032] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “connection,” and “linkage” used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0033] The above description is merely a specific embodiment of the present invention and is not intended to limit the present invention. Within the spirit and principles of the present invention, any person skilled in the art may use the above-disclosed technical content to make changes or modifications to equivalent embodiments and apply them to other fields. However, any simple 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, as well as any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of the present invention.

Claims

1. A multi-mode adjustable rotor vibration testing device, characterized in that, The device includes an adjustment box and a test platform. The test platform is movably connected to the upper part of the adjustment box. A first control box is movably connected inside the adjustment box. An angle adaptation adjustment component is provided inside the first control box. The angle adaptation adjustment component includes a first transmission unit and a second transmission unit disposed inside the first control box, a connecting plate movably connected inside the first control box, a second control box mounted at the end of the connecting plate, and a rotating plate movably connected inside the second control box. The rotating plate is fixedly connected to the test platform. The first transmission unit drives the connecting plate to rotate. The connecting plate drives the test platform to perform angle adaptation adjustment through the second control box and the rotating plate. The second transmission unit drives the rotating plate to rotate independently. The rotating plate drives the test platform to perform multi-angle adjustment.

2. The apparatus as claimed in claim 1, characterized in that, The adjustment box and the first control box are jointly equipped with a vibration mode adjustment component. The vibration mode adjustment component includes a control unit located on the side of the first control box, a square plate movably connected to the inside of the adjustment box, an arc-shaped structure movably connected between the first control box and the square plate, a fixed rod movably connected to the upper part of the square plate, a fifth servo motor mounted on the side of the first control box, and a cam mounted on the output end of the fifth servo motor. The control unit controls the arc-shaped structure to move and connect the first control box and the square plate together. The fifth servo motor starts and drives the cam to rotate. The force generated by the rotation of the cam causes the first control box to vibrate in a horizontal state. The control unit controls the arc-shaped structure to disconnect the first control box and the square plate and controls the fixed rod to move. The fixed rod connects the square plate and the adjustment box. The force generated by the rotation of the cam causes the first control box to vibrate in a vertical state. It can be adapted and adjusted according to the actual use angle of the rotor and can switch its own vibration mode to meet the vibration testing requirements of the rotor in different use scenarios.

3. The apparatus as described in claim 2, characterized in that, The first transmission unit includes a first servo motor installed inside the first control box, a first worm gear installed at the output end of the first servo motor, a first rotating rod rotatably connected inside the first control box, a first worm wheel installed at the end of the first rotating rod, the first worm wheel meshing with the first worm gear, and a gear installed at the end of the first rotating rod away from the first worm wheel.

4. The apparatus as described in claim 3, characterized in that, An arc-shaped plate is installed on the inner side of the first control box, and an arc-shaped rack is slidably arranged on the inner side of the arc-shaped plate. The gear meshes with the arc-shaped rack, and when the first rotating rod rotates, it can drive the arc-shaped rack to move along the arc-shaped plate through the gear.

5. The apparatus as described in claim 4, characterized in that, The second transmission unit includes a second servo motor mounted on the side of the second control box. A second worm gear is mounted on one end of the second servo motor that extends into the inside of the second control box. A second worm wheel is mounted on the side of the rotating plate. The second worm wheel meshes with the second worm. When the second worm rotates, it can drive the rotating plate to rotate through the second worm wheel, thereby driving the test platform to rotate.

6. The apparatus as claimed in claim 5, characterized in that, The inner side of the regulating box is provided with a sliding groove, and a sliding block is slidably arranged inside the sliding groove. The sliding block is fixedly connected to the square plate. A first spring is symmetrically installed on the outer side of the sliding block. The end of the first spring away from the sliding block is fixedly connected to the inner wall of the sliding groove. The square plate moves along the sliding groove through the sliding block.

7. The apparatus as claimed in claim 6, characterized in that, The size of the sliding groove opening is adapted to the size of the sliding block, and both the sliding groove and the sliding block have convex cross-sections; The control unit includes a third servo motor mounted on the side of the first control box. The output end of the third servo motor is equipped with a threaded rod, which is threadedly connected to the arc-shaped structure. The arc-shaped structure is slidably connected to the third servo motor. When the arc-shaped structure moves to the outside of the first fixed groove, the connection between the first control box and the square plate can be released.

8. The apparatus as claimed in claim 7, characterized in that, Both the first control box and the square plate have a first fixing groove on their sides, and the size of the opening of the first fixing groove is adapted to the size of the arc-shaped structure.

9. The apparatus as claimed in claim 8, characterized in that, A fourth servo motor is installed on the upper part of the square plate. A fixing rod is installed on the output end of the fourth servo motor. A second fixing groove is opened on the inner side of the adjustment box. The size of the opening of the second fixing groove is adapted to the size of the fixing rod. The fixing rod moves to the outside of the second fixing groove and disconnects the square plate from the adjustment box.

10. The apparatus as claimed in claim 9, characterized in that, The upper part of the square plate is equipped with multiple telescopic rods and a second spring, and the ends of the telescopic rods and the second springs away from the square plate are fixedly connected to the first control box.

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