Nonlinear vibration detection device for high-speed rotating viscoelastic plate

Abstract

The invention discloses a non-linear vibration detection device for a high-speed rotating viscoelastic plate, and belongs to the field of detection equipment, the non-linear vibration detection device comprises a supporting seat, an anti-vibration pad is fixedly connected to the outer surface of the upper end of the supporting seat, a supporting plate is fixedly connected to the outer surface of the upper end of the anti-vibration pad, and a control component is arranged on the upper side of the supporting seat. The control component comprises a connecting plate fixedly connected with the inner surface of the supporting plate, an adjusting rod is in threaded connection with the middle of the outer surface of the connecting plate, and a through groove is formed in the upper side of the outer surface of the adjusting rod. By arranging the control component, enabling the viscoelastic plate to rotate at the same speed and detecting and analyzing the nonlinear vibration parameters of the viscoelastic plate, an experimenter can conveniently carry out a control experiment, so that the influence of motor vibration on the vibration parameters of the viscoelastic plate can be better analyzed; and the vibration characteristics of the viscoelastic plate can be further compared, analyzed and researched, so that the detection error can be reduced to a certain extent.

Description

Technical Field

[0001] The present invention relates to the field of detection equipment, and more particularly to a nonlinear vibration detection device for a high-speed rotating viscoelastic plate. Background Art

[0002] Viscoelastic plates are a type of material specifically used for damping layers. Their properties are closely related to temperature and frequency. Under external forces, they exhibit both elastic and viscous deformation mechanisms, giving them excellent damping performance under specific conditions. Due to their unique damping properties, viscoelastic plates are widely used in important industrial fields requiring high damping, such as aviation, aerospace, and shipbuilding. Due to the complexity and diversity of viscoelastic materials, the nonlinear vibration parameters of viscoelastic plates need to be tested during the research and development process. Nonlinear vibration analysis of viscoelastic plates usually requires the use of complex mathematical methods and numerical simulation techniques. For example, Reddy's high-order shear deformation theory and the von Kármán geometric nonlinearity assumption can be used to establish the nonlinear governing differential equations of the system. These equations are then solved using analytical methods (such as the direct multiscale method) or numerical methods (such as the Runge-Kutta method and the differential quadrature method) to obtain the nonlinear vibration parameters of the system. In order to obtain the required vibration parameters, it is necessary to use a detection device to simulate the detection of the viscoelastic plate in a high-speed rotating state. During the detection process, a high-speed motor is usually used to drive the viscoelastic plate to rotate at high speed to simulate the actual working state of the viscoelastic plate, and the vibration frequency and amplitude of the viscoelastic plate are measured by laser vibrometry or acoustic emission vibrometry. However, in actual operation, the high-speed motor, as a power source, will generate a certain amount of vibration during operation, and the vibration will be transmitted to the detection device, thereby affecting the vibration characteristics of the viscoelastic plate or even causing resonance, which will adversely affect the accuracy of nonlinear vibration detection of the viscoelastic plate. Summary of the Invention

[0003] In response to the problems existing in the prior art, the purpose of the present invention is to provide a nonlinear vibration detection device for a high-speed rotating viscoelastic plate. By setting a control component, the viscoelastic plate is rotated at the same speed, and the nonlinear vibration parameters of the viscoelastic plate are detected and analyzed, so that experimenters can conduct control experiments, thereby better analyzing the impact of motor vibration on the vibration parameters of the viscoelastic plate, facilitating further comparative analysis and research on the vibration characteristics of the viscoelastic plate, and thus reducing detection errors to a certain extent.

[0004] To solve the above problems, the present invention adopts the following technical solutions.

[0005] A nonlinear vibration detection device for a high-speed rotating viscoelastic plate comprises a support base, a vibration damping pad is fixedly connected to the outer surface of the upper end of the support base, a support plate is fixedly connected to the outer surface of the upper end of the vibration damping pad, and a control component is provided on the upper side of the support base; The control component includes a connecting plate fixedly connected to the inner surface of the support plate, an adjusting rod is threadedly connected to the middle part of the outer surface of the connecting plate, a through groove is provided on the upper side of the outer surface of the adjusting rod, the lower end of the adjusting rod is rotatably connected to the mounting plate, a positioning hole is provided on the outer surface of the mounting plate, the upper end outer surface of the support seat is fixedly connected to the positioning rod, the upper end outer surface of the mounting plate is fixedly connected to the motor, the upper end of the motor output shaft is fixedly connected to the driving rod, the outer surface of the driving rod is fixedly connected to the limiting plate, and an elastic plate is placed on the upper end outer surface of the limiting plate.

[0006] Furthermore, the connecting plates and adjusting rods are in several groups and distributed in a ring-shaped array, the positioning rod is located directly below the positioning hole, the support plate and vibration damping pad are both in the shape of a ring, the vibration damping pad is made of elastic rubber material, and the positioning rods and positioning holes are in several groups and distributed in a ring-shaped array.

[0007] Furthermore, a spiral groove is provided in the middle portion of the outer surface of the driving rod, and a clamping assembly is provided on the outer side of the driving rod. The clamping assembly includes a locking sleeve that is spirally connected to the outer surface of the driving rod, and the lower end of the locking sleeve is open. A suction cup is in contact with the outer surface of the upper end of the elastic plate, and a sealing ring is fixedly connected to the inner surface of the suction cup. The suction cup and the sealing ring are both annular, and the lower side of the outer surface of the locking sleeve is in rotational contact with the outer surface of the upper end of the suction cup. The suction cup and the sealing ring are both made of elastic and wear-resistant material.

[0008] Furthermore, a displacement groove is provided on the outer surface of the upper end of the limit plate, and a clamping block is slidably connected to the inner surface of the displacement groove. The clamping block has an L-shaped structure, and a spring is fixedly connected to the side of the outer surface of the clamping block close to the driving rod, and the spring is fixedly connected to the inner surface of the displacement groove at one end away from the clamping block. The number of the displacement grooves and clamping blocks is several groups and distributed in a ring array. The outer surface of the clamping block is in contact with the outer surface of the elastic plate away from the driving rod, and the upper end of the inner surface of the locking sleeve is fixedly connected to a top pipe, and the lower side of the outer surface of the top pipe is in rotational contact with the clamping block.

[0009] Furthermore, a test component 1 is provided on the upper side of the support plate, and the test component 1 includes a fixed sleeve fixedly connected to the outer surface of the upper end of the support plate, the outer surface of the upper end of the fixed sleeve is fixedly connected to a fixed cylinder, the elastic plate is located inside the fixed cylinder, and the lower end of the inner surface of the fixed cylinder is fixedly connected to a mounting bracket, and the mounting bracket is in a circular ring shape.

[0010] Furthermore, a laser sensor is fixedly connected to the outer surface of the mounting frame, a grille is provided on the outer surface of the fixing sleeve, a test box is fixedly connected to the outer surface of the upper end of the support plate located outside the fixing sleeve, and a sensing plate is fixedly connected to the inner surface of the test box. The sensing plates, grilles, and laser sensors are all in several groups and distributed in a ring array.

[0011] Furthermore, a test component 2 is provided on the lower side of the elastic plate, and the test component 2 includes a guide groove opened on the outer surface of the lower end of the fixed cylinder, the inner surface of the guide groove is slidably connected to a guide rod, and the outer surface of the upper end of the guide rod is fixedly connected to a vibration sensor. The guide grooves, guide rods and vibration sensors are numbered in several groups and distributed in a ring array, and the vibration sensor is located on the lower side of the elastic plate.

[0012] Furthermore, an adjustment component is provided on the lower side of the fixed cylinder, and the adjustment component includes a retaining ring fixedly connected to the outer surface of the fixed sleeve, and the outer surface of the retaining ring is connected to a support plate for damping rotation, and the support plate is annular, and a limiting groove is provided on the outer surface of the upper end of the support plate, and the limiting groove is arc-shaped, and a movable rod is fixedly connected to the outer surface of the lower end of the fixed cylinder, and the lower end of the movable rod is located inside the limiting groove.

[0013] Furthermore, a swing rod is rotatably connected to the lower side of the outer surface of the guide rod, and a top rod is rotatably connected to the end of the swing rod away from the guide rod. The outer surface of the lower end of the top rod is fixedly connected to the outer surface of the upper end of the support plate. The number of the swing rods and the top rods is several groups and is distributed corresponding to the guide rod. The outer surface of the test box is provided with an operating port, and the number of the operating ports is several groups and is symmetrically distributed.

[0014] Furthermore, the upper end of the test box is open, the retaining ring is annular, the upper end of the fixed cylinder is snap-connected with a cover plate, the locking sleeve and the lower end of the top pipe are both arc-shaped, and the sensing plate, grid and laser sensor are distributed in a straight line.

[0015] Compared with the prior art, the advantages of the present invention are: (1) This scheme sets up a control component, makes the viscoelastic plate rotate at the same speed, and detects and analyzes the nonlinear vibration parameters of the viscoelastic plate, so that the experimenters can conduct control experiments, thereby better analyzing the influence of motor vibration on the vibration parameters of the viscoelastic plate, and facilitating further comparative analysis of the vibration characteristics of the viscoelastic plate, thereby reducing the detection error to a certain extent; (2) This scheme sets up test assembly 1 and test assembly 2, detects and records the vibration parameters of the viscoelastic plate in different ways, and then compares and analyzes the test results with the test results of test assembly 1, thereby further reducing the test error and helping to improve the test accuracy of the viscoelastic plate; (3) This solution sets an adjustment component, which can drive several groups of ring-shaped vibration sensors to move synchronously through the rotation of the support plate, thereby adjusting the position of the vibration sensors to facilitate the detection and analysis of vibration parameters at different positions of the viscoelastic plate. While improving the detection accuracy of the detection device, it can also improve the convenience of operation of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a top view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Middle AA section view; Figure 4 For the present invention Figure 1 Middle BB section view; Figure 5 This is a schematic diagram of the internal structure of the fixed cylinder of the present invention; Figure 6 For the present invention Figure 5 The enlarged schematic diagram of point C in the middle; Figure 7 For the present invention Figure 3 The enlarged schematic diagram of point D in the middle; Figure 8 For the present invention Figure 5 The enlarged schematic diagram at E in the middle; Figure 9 For the present invention Figure 4 Enlarged schematic diagram at point F in the middle.

[0017] Description of the numbers in the figure: 11. Support base; 12. Test box; 13. Operation port; 14. Sensing plate; 15. Fixing cylinder; 16. Cover plate; 17. Driving rod; 18. Locking sleeve; 19. Elastic plate; 20. Grille; 21. Limiting plate; 22. Displacement groove; 23. Clamping block; 24. Spring; 25. Ejector pipe; 26. Suction cup; 27. Sealing ring; 28. Vibration damping pad; 29. Support plate; 30. Fixing sleeve; 31. Motor; 32. Connecting plate; 33. Mounting plate; 34. Adjusting rod; 35. Through groove; 36. Retaining ring; 37. Support plate; 38. Guide groove; 39. Guide rod; 40. Vibration sensor; 41. Swing rod; 42. Ejector rod; 43. Movable rod; 44. Limiting groove; 45. Positioning hole; 46. Positioning rod; 47. Mounting bracket; 48. Laser sensor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 9 A nonlinear vibration detection device for a high-speed rotating viscoelastic plate includes a support base 11, a vibration-damping pad 28 is fixedly connected to the outer surface of the upper end of the support base 11, a support plate 29 is fixedly connected to the outer surface of the upper end of the vibration-damping pad 28, and a control component is provided on the upper side of the support base 11; The control component includes a connecting plate 32 fixedly connected to the inner surface of the support plate 29, an adjusting rod 34 is threadedly connected to the middle part of the outer surface of the connecting plate 32, a through groove 35 is provided on the upper side of the outer surface of the adjusting rod 34, the lower end of the adjusting rod 34 is rotatably connected to the mounting plate 33, a positioning hole 45 is provided on the outer surface of the mounting plate 33, the upper end outer surface of the support seat 11 is fixedly connected to the positioning rod 46, the upper end outer surface of the mounting plate 33 is fixedly connected to the motor 31, the upper end of the output shaft of the motor 31 is fixedly connected to the driving rod 17, the outer surface of the driving rod 17 is fixedly connected to the limiting plate 21, and the upper end outer surface of the limiting plate 21 is placed with an elastic plate 19.

[0020] The connecting plates 32 and the adjusting rods 34 are in several groups and distributed in a ring array. The positioning rods 46 are located directly below the positioning holes 45. The supporting plates 29 and the vibration-damping pads 28 are both in annular shape. The vibration-damping pads 28 are made of elastic rubber material. The positioning rods 46 and the positioning holes 45 are in several groups and distributed in a ring array.

[0021] By adopting the above technical solution, when detecting and analyzing the nonlinear vibration parameters of the viscoelastic plate 19 during high-speed rotation, it is necessary to simulate the working state of the viscoelastic plate 19 to make the viscoelastic plate 19 rotate at high speed. When the high-speed motor 31 drives the viscoelastic plate 19 to rotate at high speed, in order to test the influence of the installation position of the power source on the vibration parameters of the viscoelastic plate 19, a control component is set up, and the viscoelastic plate 19 is placed on the upper side of the limit plate 21. The viscoelastic plate 19 is supported by the limit plate 21. After the viscoelastic plate 19 is stably clamped, the support seat 11 is supported by the vibration damping pad 28. The supporting plate 29 is lifted and supported. The supporting plate 29 pulls and supports the adjusting rod 34 through the connecting plate 32. The mounting plate 33 at the lower end of the adjusting rod 34 is rotated and connected to support the connecting plate 32, so that the connecting plate 32 is out of contact with the upper surface of the support seat 11. At this time, the positioning hole 45 is out of contact with the positioning rod 46, so that the mounting plate 33 is lifted and supported by the adjusting rod 34 and the connecting plate 32, and the motor 31 is fixedly supported by the mounting plate 33. At this time, the motor 31 serves as a power source, and its own vibration will be transmitted to the detection device together, so that the detection device and the motor 31 maintain the same vibration frequency. When conducting a control experiment, the operator rotates the adjusting rod 34, and the adjusting rod 34 is threadedly connected to the connecting plate 32 and moves downward synchronously during the rotation, thereby driving the mounting plate 33 and the motor 31 to move downward through the adjusting rod 34, so that the mounting plate 33 is placed on the upper surface of the support seat 11. At this time, the positioning rod 46 on the surface of the support seat 11 is engaged with the inside of the positioning hole 45, and the positioning rod 46 cooperates with the positioning hole 45 to limit the mounting plate 33. At the same time, the adjusting rod 34 is disengaged from the connecting plate 32 through the through groove 35 on its surface. At this time, the vibration of the motor 31 itself is only transmitted To the support base 11, the vibration-damping pad 28 can perform buffering and shock absorption between the support base 11 and the support plate 29, so that the vibration frequency of the detection device can be asynchronous with the power source. By making the two groups of viscoelastic plates 19 rotate at the same speed and detecting and analyzing the nonlinear vibration parameters of the viscoelastic plates 19, it is convenient for experimenters to conduct control experiments, so as to better analyze the influence of the vibration of the motor 31 on the vibration parameters of the viscoelastic plates 19, and facilitate further comparative analysis and research on the vibration characteristics of the viscoelastic plates 19, thereby reducing the detection error to a certain extent.

[0022] like Figure 1 、 Figure 3 and Figure 6As shown, a spiral groove is provided in the middle of the outer surface of the driving rod 17, and a clamping assembly is provided on the outside of the driving rod 17. The clamping assembly includes a locking sleeve 18 that is spirally connected to the outer surface of the driving rod 17. The lower end of the locking sleeve 18 is open, and the outer surface of the upper end of the elastic plate 19 is in contact with a suction cup 26. The inner surface of the suction cup 26 is fixedly connected to a sealing ring 27. The suction cup 26 and the sealing ring 27 are both annular. The lower side of the outer surface of the locking sleeve 18 is in rotational contact with the outer surface of the upper end of the suction cup 26. The suction cup 26 and the sealing ring 27 are both made of elastic and wear-resistant material.

[0023] A displacement groove 22 is provided on the outer surface of the upper end of the limiting plate 21, and a clamping block 23 is slidably connected to the inner surface of the displacement groove 22. The clamping block 23 has an L-shaped structure. A spring 24 is fixedly connected to the outer surface of the clamping block 23 close to the driving rod 17, and the spring 24 is fixedly connected to the inner surface of the displacement groove 22 at one end away from the clamping block 23. The displacement grooves 22 and the clamping blocks 23 are provided in several groups and are distributed in a ring array. The outer surface of the clamping block 23 is in contact with the outer surface of the elastic plate 19 away from the driving rod 17, and the upper end of the inner surface of the locking sleeve 18 is fixedly connected to a top pipe 25, and the lower side of the outer surface of the top pipe 25 is in rotational contact with the clamping block 23.

[0024] By adopting the above technical solution, when the vibration characteristics of the viscoelastic plate 19 are detected and analyzed, in order to keep the state of the viscoelastic plate 19 stable, a clamping assembly is provided. Before the test, the viscoelastic plate 19 is placed on the upper side of the limit plate 21, and then the operator rotates the locking sleeve 18. The locking sleeve 18 is connected to the driving rod 17 through a spiral groove and moves downward synchronously during the rotation. The locking sleeve 18 squeezes the suction cup 26 during the downward movement, so that the suction cup 26 and the sealing ring 27 fit in contact with the upper surface of the viscoelastic plate 19. The limit plate 21 cooperates with the suction cup 26 and the sealing ring 27 to stably clamp the viscoelastic plate 19 in the upper and lower directions. The locking sleeve 18 drives the jacking pipe 25 downward synchronously during the downward movement, and the lower end of the jacking pipe 25 is pushed downward. The clamping block 23 will contact the clamping block 23 and push the clamping block 23 to slide away from the driving rod 17, so that the clamping block 23 contacts the surface of the viscoelastic plate 19. The clamping block 23 will stretch the spring 24 during the movement, and the displacement groove 22 can play a sliding guide role for the clamping block 23. Through several groups of annularly distributed clamping blocks 23, the viscoelastic plate 19 can be clamped and fixed in the horizontal direction, thereby further improving the clamping stability of the viscoelastic plate 19. By setting up a clamping assembly, the viscoelastic plate 19 can be stably clamped in different directions, thereby ensuring the stability of the viscoelastic plate 19 during high-speed rotation, helping to reduce the detection error caused by unstable clamping, and further improving the detection accuracy to a certain extent.

[0025] like Figure 3 As shown, a test component 1 is provided on the upper side of the support plate 29, and the test component 1 includes a fixing sleeve 30 fixedly connected to the outer surface of the upper end of the support plate 29, and the outer surface of the upper end of the fixing sleeve 30 is fixedly connected to the fixing cylinder 15, and the elastic plate 19 is located inside the fixing cylinder 15. The lower end of the inner surface of the fixing cylinder 15 is fixedly connected to the mounting bracket 47, and the mounting bracket 47 is annular.

[0026] A laser sensor 48 is fixedly connected to the outer surface of the mounting frame 47, a grille 20 is provided on the outer surface of the fixing sleeve 30, the outer surface of the upper end of the support plate 29 is located outside the fixing sleeve 30 and is fixedly connected to the test box 12, and the inner surface of the test box 12 is fixedly connected to the sensing plate 14. The sensing plates 14, grille 20, and laser sensors 48 are all in several groups and are distributed in a ring array.

[0027] By adopting the above technical solution, the support plate 29 supports the fixed cylinder 15 via the fixing sleeve 30, and the fixed cylinder 15 fixes and supports the laser sensor 48 via the mounting bracket 47. During the nonlinear vibration detection of the viscoelastic plate 19, the laser sensor 48 emits detection light to illuminate the viscoelastic plate 19. The light is projected onto the surface of the sensing plate 14 through the grille 20 on the surface of the fixed cylinder 15. During the vibration of the viscoelastic plate 19, the viscoelastic plate 19 blocks part of the light emitted by the laser sensor 48. At this time, the illumination range of the surface of the sensing plate 14 changes accordingly. The sensing plate 14 records the change in the position of the light, thereby recording the vibration amplitude and frequency of the viscoelastic plate 19. Parameters such as the rotational speed, vibration frequency, and vibration amplitude of the elastic plate 19 are then summarized and analyzed to calculate the nonlinear vibration parameters of the viscoelastic plate 19. By providing multiple groups of sensing plates 14, grilles 20, and laser sensors 48 distributed in a ring array, multiple sets of detection data can be obtained, thereby helping to reduce detection errors.

[0028] like Figure 3 、 Figure 5 and Figure 8 As shown, a test component 2 is provided on the lower side of the elastic plate 19, and the test component 2 includes a guide groove 38 opened on the outer surface of the lower end of the fixed cylinder 15, and the inner surface of the guide groove 38 is slidably connected to a guide rod 39, and the outer surface of the upper end of the guide rod 39 is fixedly connected to a vibration sensor 40. The guide grooves 38, guide rods 39 and vibration sensors 40 are in several groups and distributed in a ring array. The vibration sensor 40 is located on the lower side of the elastic plate 19.

[0029] By adopting the above technical solution, in order to further improve the test accuracy, a test component 2 is set up. The fixed cylinder 15 slides and guides the guide rod 39 through the guide groove 38, and the vibration sensor 40 is supported by the guide rod 39. The vibration sensor 40 is located on the lower side of the viscoelastic plate 19 and can detect and record the vibration amplitude and frequency of the viscoelastic plate 19. The detection results are then compared and analyzed with the detection results of the test component 1, thereby further reducing the test error and helping to improve the test accuracy of the viscoelastic plate 19.

[0030] like Figure 8 As shown, an adjustment component is provided on the lower side of the fixed cylinder 15, and the adjustment component includes a retaining ring 36 fixedly connected to the outer surface of the fixed sleeve 30, and the outer surface of the retaining ring 36 is connected to a support plate 37 for damping rotation. The support plate 37 is annular, and a limiting groove 44 is provided on the outer surface of the upper end of the support plate 37. The limiting groove 44 is arc-shaped. A movable rod 43 is fixedly connected to the outer surface of the lower end of the fixed cylinder 15, and the lower end of the movable rod 43 is located inside the limiting groove 44.

[0031] The lower side of the outer surface of the guide rod 39 is rotatably connected to a swing rod 41, and the end of the swing rod 41 away from the guide rod 39 is rotatably connected to a push rod 42. The outer surface of the lower end of the push rod 42 is fixedly connected to the outer surface of the upper end of the support plate 37. The number of the swing rods 41 and the push rods 42 are several groups and are distributed corresponding to the guide rod 39. The outer surface of the test box 12 is provided with an operating port 13, and the number of the operating ports 13 is several groups and is symmetrically distributed.

[0032] The upper end of the test box 12 is open, the retaining ring 36 is annular, the upper end of the fixing cylinder 15 is engaged with the cover plate 16, the lower ends of the locking sleeve 18 and the top pipe 25 are both arc-shaped, and the sensing plate 14, the grid 20 and the laser sensor 48 are distributed in a straight line.

[0033] By adopting the above technical solution, during the test process, in order to record the difference in vibration amplitude at different positions of the viscoelastic plate 19, it is necessary to adjust the position of the vibration sensor 40. For this purpose, an adjustment component is provided. During operation, the fixing sleeve 30 rotatably supports the support plate 37 through the retaining ring 36. The support plate 37 is connected to the retaining ring 36 through damping rotation. When there is no external force, the support plate 37 will remain stationary. When adjusting the position of the vibration sensor 40, the operator rotates the support plate 37 through the operating port 13 on the surface of the test box 12. During the rotation, the support plate 37 will drive the limiting groove 44 on its surface to move synchronously. The fixing cylinder 15 limits the support plate 37 through the movable rod 43 and the limiting groove 44, so that the support plate 37 can only rotate to a certain angle. The lower end of the push rod 42 is fixedly connected to the support plate 37, and the support plate 37 will drive the push rod 42 to move synchronously. The top rod 42 drives the swing rod 41 to swing during the movement, and the guide rod 39 is pulled by the swing rod 41 so that the guide rod 39 slides linearly inside the guide groove 38, thereby driving the vibration sensor 40 to adjust its position through the guide rod 39. By setting an adjustment component, the rotation of the support plate 37 can drive several groups of annularly distributed vibration sensors 40 to move synchronously, thereby adjusting the position of the vibration sensor 40, so as to facilitate the detection and analysis of vibration parameters at different positions of the viscoelastic plate 19, while improving the detection accuracy of the detection device and the ease of operation of the detection device. The cover plate 16 can cover and block the upper end of the fixed cylinder 15, which can not only reduce the influence of external noise on the vibration parameters of the viscoelastic plate 19, but also facilitate the propagation of light inside the fixed cylinder 15, thereby ensuring detection accuracy.

[0034] Instructions for use: When detecting and analyzing the nonlinear vibration parameters of the viscoelastic plate 19 during high-speed rotation, first place the viscoelastic plate 19 on the upper side of the limit plate 21. The limit plate 21 cooperates with the suction cup 26 and the sealing ring 27 to stably clamp the viscoelastic plate 19 in the up and down directions. Then, the motor 31 and the drive rod 17 drive the viscoelastic plate 19 to rotate at high speed. The laser sensor 48 emits detection light to illuminate the viscoelastic plate 19. The light is projected onto the surface of the sensing plate 14 through the grille 20 on the surface of the fixed cylinder 15. The change in the light position is recorded by the sensing plate 14. The vibration sensor 40 is located at the viscoelastic plate 19. The lower side of the plate 19 can detect and record the vibration amplitude and frequency of the viscoelastic plate 19. The rotation of the support plate 37 can drive several groups of annularly distributed vibration sensors 40 to move synchronously, thereby adjusting the position of the vibration sensor 40 to facilitate detection and analysis of vibration parameters at different positions of the viscoelastic plate 19. By adjusting the position of the motor 31, the detection device and the motor 31 maintain the same vibration frequency, so that the experimenter can conduct a control experiment, thereby better analyzing the influence of the vibration of the motor 31 on the vibration parameters of the viscoelastic plate 19, and facilitating further comparative analysis and research on the vibration characteristics of the viscoelastic plate 19.

[0035] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A nonlinear vibration detection device for a high-speed rotating viscoelastic plate, comprising a support seat (11), characterized in that: A vibration damping pad (28) is fixedly connected to the outer surface of the upper end of the support seat (11), a support plate (29) is fixedly connected to the outer surface of the upper end of the vibration damping pad (28), and a control component is provided on the upper side of the support seat (11); The control assembly comprises a connecting plate (32) fixedly connected to the inner surface of the supporting plate (29), an adjusting rod (34) is threadedly connected to the middle portion of the outer surface of the connecting plate (32), a through groove (35) is provided on the upper side of the outer surface of the adjusting rod (34), the lower end of the adjusting rod (34) is rotatably connected to the mounting plate (33), the outer surface of the mounting plate (33) is provided with a positioning hole (45), the outer surface of the upper end of the supporting seat (11) is fixedly connected to the positioning rod (46), the outer surface of the upper end of the mounting plate (33) is fixedly connected to the motor (31), the upper end of the output shaft of the motor (31) is fixedly connected to the driving rod (17), the outer surface of the driving rod (17) is fixedly connected to the limiting plate (21), and the outer surface of the upper end of the limiting plate (21) is provided with an elastic plate (19).

2. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 1, characterized in that: The connecting plates (32) and the adjusting rods (34) are provided in several groups and are distributed in a ring array. The positioning rods (46) are located directly below the positioning holes (45). The supporting plates (29) and the vibration damping pads (28) are both annular. The vibration damping pads (28) are made of elastic rubber material. The positioning rods (46) and the positioning holes (45) are provided in several groups and are distributed in a ring array.

3. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 2, characterized in that: A spiral groove is provided in the middle of the outer surface of the driving rod (17), and a clamping assembly is provided on the outer side of the driving rod (17). The clamping assembly includes a locking sleeve (18) that is spirally connected to the outer surface of the driving rod (17), the lower end of the locking sleeve (18) is open, the outer surface of the upper end of the elastic plate (19) is in contact with a suction cup (26), and the inner surface of the suction cup (26) is fixedly connected with a sealing ring (27), the suction cup (26) and the sealing ring (27) are both annular, the lower side of the outer surface of the locking sleeve (18) is in rotational contact with the outer surface of the upper end of the suction cup (26), and the suction cup (26) and the sealing ring (27) are both made of elastic wear-resistant material.

4. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 3, characterized in that: A displacement groove (22) is provided on the outer surface of the upper end of the limit plate (21), and a clamping block (23) is slidably connected to the inner surface of the displacement groove (22). The clamping block (23) is in an L-shaped structure. A spring (24) is fixedly connected to the side of the outer surface of the clamping block (23) close to the driving rod (17). The end of the spring (24) away from the clamping block (23) is fixedly connected to the inner surface of the displacement groove (22). The number of the displacement grooves (22) and the clamping blocks (23) is several groups and is distributed in a ring array. The outer surface of the clamping block (23) away from the driving rod (17) is in contact with the outer surface of the elastic plate (19). The upper end of the inner surface of the locking sleeve (18) is fixedly connected to the top pipe (25), and the lower side of the outer surface of the top pipe (25) is in rotational contact with the clamping block (23).

5. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 4, characterized in that: A test assembly 1 is provided on the upper side of the support plate (29), and the test assembly 1 includes a fixing sleeve (30) fixedly connected to the outer surface of the upper end of the support plate (29), the outer surface of the upper end of the fixing sleeve (30) is fixedly connected to the fixing cylinder (15), the elastic plate (19) is located inside the fixing cylinder (15), and the lower end of the inner surface of the fixing cylinder (15) is fixedly connected to the mounting frame (47), and the mounting frame (47) is annular.

6. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 5, characterized in that: The outer surface of the mounting frame (47) is fixedly connected to a laser sensor (48), the outer surface of the fixing sleeve (30) is provided with a grille (20), the outer surface of the upper end of the support plate (29) is located outside the fixing sleeve (30) and is fixedly connected to a test box (12), and the inner surface of the test box (12) is fixedly connected to a sensing plate (14), and the sensing plates (14), grille (20), and laser sensors (48) are all provided in a plurality of groups and are distributed in a ring array.

7. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 6, characterized in that: A test assembly 2 is provided on the lower side of the elastic plate (19), and the test assembly 2 includes a guide groove (38) provided on the outer surface of the lower end of the fixed cylinder (15), the inner surface of the guide groove (38) is slidably connected to a guide rod (39), and the outer surface of the upper end of the guide rod (39) is fixedly connected to a vibration sensor (40), the guide groove (38), the guide rod (39) and the vibration sensor (40) are provided in a plurality of groups and are distributed in a ring array, and the vibration sensor (40) is located on the lower side of the elastic plate (19).

8. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 7, characterized in that: An adjustment assembly is provided on the lower side of the fixed cylinder (15), and the adjustment assembly includes a retaining ring (36) fixedly connected to the outer surface of the fixed sleeve (30). The outer surface of the retaining ring (36) is connected to a support plate (37) for damping rotation. The support plate (37) is annular. A limiting groove (44) is provided on the outer surface of the upper end of the support plate (37). The limiting groove (44) is arc-shaped. A movable rod (43) is fixedly connected to the outer surface of the lower end of the fixed cylinder (15). The lower end of the movable rod (43) is located inside the limiting groove (44).

9. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 8, characterized in that: The lower side of the outer surface of the guide rod (39) is rotatably connected to a swing rod (41), and the end of the swing rod (41) away from the guide rod (39) is rotatably connected to a push rod (42), and the outer surface of the lower end of the push rod (42) is fixedly connected to the outer surface of the upper end of the support plate (37). The number of the swing rods (41) and the push rods (42) is several groups and distributed corresponding to the guide rod (39). The outer surface of the test box (12) is provided with an operating port (13), and the number of the operating port (13) is several groups and is symmetrically distributed.

10. The nonlinear vibration detection device for a high-speed rotating viscoelastic plate according to claim 9, characterized in that: The upper end of the test box (12) is open, the retaining ring (36) is annular, the upper end of the fixing cylinder (15) is snap-connected with a cover plate (16), the lower ends of the locking sleeve (18) and the top pipe (25) are both arc-shaped, and the sensing plate (14), the grid (20) and the laser sensor (48) are arranged in a straight line.

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