Gearbox high-speed-level vibration mode testing device

Abstract

The utility model discloses a gearbox high-speed-level vibration mode testing device, which relates to the technical field of gear production testing and comprises a workbench, a side support frame vertically fixed at the top end of the workbench is arranged at the top end of the workbench, and a horizontal transverse support rod is fixed at the top end of the side support frame. A worm gear frame erected on the bottom face of the transverse supporting rod is fixed to the bottom end of the transverse supporting rod, a rotating shaft is fixed to the surface of the worm gear frame, a telescopic rod capable of swinging is rotationally connected to the surface of the rotating shaft, a spring rod capable of elastically stretching out and drawing back is arranged at the bottom end of the telescopic rod, and a testing pen is arranged at the bottom end of the connecting sleeve. According to the utility model, the bottom end of the telescopic rod is provided with the elastically telescopic spring rod for elastic pressing, so that the test pen can be tightly contacted with different positions on the surface of the gearbox, the vibration on the surface of the gearbox can be precisely captured by the test pen, the test pen is identified through the vibration sensor in the capturing process, and the detection accuracy is improved. And the identification accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of gear production testing technology, specifically a high-speed vibration modal testing device for gearboxes. Background Technology

[0002] Gearboxes are critical components in mechanical transmission systems, and their operating condition directly affects the performance and reliability of the entire system. Vibration issues are particularly prominent under high-speed operating conditions. To ensure the normal operation of gearboxes, vibration modal testing is essential. A high-speed gearbox vibration modal testing device, through the organic integration of excitation, measurement, and analysis systems, can effectively perform vibration modal testing on gearboxes. Through spectral analysis and modal analysis, the natural frequencies and mode shapes of the gearbox can be accurately identified, providing important reference data for gearbox design and maintenance.

[0003] Spectral analysis of the gearbox mainly includes Fourier transform: performing a Fourier transform on the acquired vibration signal to obtain a spectrum. Spectral characteristics: identifying the main frequency components in the spectrum, including natural frequencies and meshing frequencies. Modal analysis of the gearbox mainly includes modal parameter identification: identifying modal parameters such as the gearbox's natural frequencies, damping ratio, and mode shapes based on the spectral analysis results. Modal parameter verification: comparing the test results with the finite element calculation results to verify the accuracy of the test results.

[0004] Currently, gearbox testing methods mainly include single-point excitation: applying excitation at one point in the gearbox, suitable for testing simple structures; multi-point excitation: applying excitation simultaneously at multiple points in the gearbox, suitable for testing complex structures; and the selection of measurement points, choosing key parts of the gearbox (such as bearing housings, gear meshing points, and various parts of the gearbox housing) as measurement points. Measurements are taken at different locations in the gearbox to obtain comprehensive vibration information.

[0005] Traditionally, the measurement points for gearboxes mainly involve keeping the test pen stationary while the gearbox itself constantly changes position on the worktable. This constant repositioning of the gearbox on the worktable makes the testing process very cumbersome, inefficient, and results in a heavy workload for the testing personnel. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a high-speed vibration modal testing device for gearboxes, so as to solve the technical problems of traditional gearboxes where the measurement point is mainly the test pen position is fixed, while the gearbox is constantly changing position on the worktable. The constant changing position of the gearbox on the worktable makes the testing process very cumbersome, the testing efficiency is low, and the workload of the testing personnel is large.

[0007] To achieve the above objectives, this utility model employs the following technical solution:

[0008] A high-speed vibration modal testing device for a gearbox includes a workbench. A side support frame is vertically fixed to the top of the workbench. A horizontal crossbar is fixed to the top of the side support frame. A worm gear frame is vertically fixed to the bottom of the crossbar. A rotating shaft is fixed to the surface of the worm gear frame. A swingable telescopic rod is rotatably connected to the surface of the rotating shaft. A spring rod that can elastically extend and retract is provided at the bottom of the telescopic rod. A connecting sleeve is fixed to the bottom of the spring rod. A test pen is provided at the bottom of the connecting sleeve.

[0009] As a preferred technical solution of this utility model, a gearbox is installed on the top of the workbench, a corresponding circular hole is opened on the top of the workbench, and a number of downward through circular holes are opened on the top of the workbench. A locking bolt is provided on the bottom surface of the gearbox, and the locking bolt extends through the circular hole to the bottom surface of the workbench. A locking nut is provided on the surface of the locking bolt extending out of the bottom surface of the workbench.

[0010] As a preferred technical solution of this utility model, a worm gear bracket is fixedly installed on the bottom surface of the horizontal support rod, a worm gear is rotatably connected to the surface of the worm gear bracket, a semi-worm wheel is provided at the top of the telescopic rod, the semi-worm wheel is meshed with the worm gear, and an adjustment knob is provided at one end of the worm gear.

[0011] As a preferred embodiment of this invention, the test pen is configured as a disc, disc, or wheel structure.

[0012] As a preferred embodiment of this utility model, the bottom end of the telescopic rod is provided with a spring hole of a circular structure, the top end of the spring rod slides into the spring hole, and a spring is provided at the top end of the spring rod that extends into the spring hole.

[0013] As a preferred embodiment of this utility model, a test shaft is provided on the surface of the connecting sleeve, the test pen is provided at one end of the test shaft, and a vibration sensor is provided at the other end of the test shaft.

[0014] As a preferred embodiment of this invention, the vibration sensor has a metal shaft inside the test shaft that is connected to the test pen.

[0015] As a preferred embodiment of this utility model, the bottom of the workbench is fixed with a support leg that stands upright on the bottom surface of the workbench.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention features a side support frame vertically fixed to the top of the workbench. A horizontal crossbar is fixed to the top of the side support frame, and a worm gear frame is vertically fixed to the bottom of the crossbar. A rotating shaft is fixed to the surface of the worm gear frame, and a swingable telescopic rod is rotatably connected to the surface of the shaft. The swinging of the telescopic rod allows the test pen to swing along the surface of the gearbox. An elastically extendable spring rod at the bottom of the telescopic rod provides elastic compression, ensuring close contact between the test pen and different locations on the gearbox surface. This allows the test pen to precisely capture vibrations on the gearbox surface. Vibration sensors identify these vibrations during the capture process, improving the accuracy of the identification.

[0018] This invention features a gearbox mounted on the top of a workbench. The top of the workbench has corresponding circular holes, and several downward-through circular holes. Locking bolts are installed on the bottom surface of the gearbox, extending through the circular holes towards the bottom of the workbench. Locking nuts are fitted onto the surfaces of the locking bolts extending beyond the bottom of the workbench. This structural design of the locking bolts and nuts improves the installation stability of the gearbox, preventing vibration and loosening of the gears inside during high-speed rotation. It also enhances the structural stability of the gearbox placed on the workbench.

[0019] This invention features a worm gear bracket fixedly mounted on the bottom surface of a horizontal support rod. A worm gear is rotatably connected to the surface of the worm gear bracket. A semi-worm wheel is located at the top of the telescopic rod, meshing with the worm gear. An adjustment knob is located at one end of the worm gear. By rotating the adjustment knob, the worm gear is driven to rotate. During the rotation of the worm gear, the semi-worm wheel swings at an angle. This, combined with the test pen (which is a disc, plate, or wheel structure) sliding contact on the surface of the gearbox, ensures that the test pen can make good contact with the surface of the gearbox regardless of the angle at which the telescopic rod swings, thus improving the accuracy of test data acquisition.

[0020] This invention features a spring hole with a circular structure at the bottom of the telescopic rod. The top end of the spring rod slides into the spring hole, and a spring is installed at the top end of the spring rod extending into the spring hole. This facilitates elastic adjustment and allows for adaptive adjustment according to the surface contour of the gearbox, making it easy to adjust the angle of the telescopic rod. If necessary, a test pen can be used to assist in the adjustment.

[0021] This invention features a test shaft on the surface of a connecting sleeve, a test pen at one end of the test shaft, and a vibration sensor at the other end of the test shaft. The vibration sensor is connected to the test pen via a metal shaft inside the test shaft, thereby improving the accuracy of vibration transmission.

[0022] The bottom of the workbench is fixed with support legs that stand upright on the bottom surface of the workbench, which improves the stability of the workbench.

[0023] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0024] Figure 1 This is a front view schematic diagram of the gearbox high-speed stage vibration modal testing device of this utility model;

[0025] Figure 2 This is a schematic diagram of the left side of the gearbox high-speed stage vibration modal testing device of this utility model;

[0026] Figure 3 This is a schematic diagram of the left cross-sectional structure of the gearbox high-speed stage vibration modal testing device of this utility model;

[0027] In the diagram: 1. Side support frame; 2. Gearbox; 3. Rotating shaft; 4. Half worm gear; 5. Worm; 6. Adjustment knob; 7. Worm gear bracket; 8. Horizontal support rod; 9. Telescopic rod; 10. Spring rod; 11. Connecting sleeve; 12. Test pen; 13. Worm gear frame; 14. Vibration sensor; 15. Test shaft; 16. Workbench; 17. Support leg; 18. Locking bolt; 19. Locking nut; 20. Spring; 21. Spring hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0033] Example 1

[0034] Please see Figure 1-3 The present invention provides a technical solution: a high-speed vibration modal testing device for a gearbox, comprising a workbench 16, a side support frame 1 vertically fixed to the top of the workbench 16, a horizontal crossbar 8 fixed to the top of the side support frame 1, a worm gear frame 13 vertically fixed to the bottom of the crossbar 8, a rotating shaft 3 fixed to the surface of the worm gear frame 13, a swingable telescopic rod 9 rotatably connected to the surface of the rotating shaft 3, a spring rod 10 elastically extendable and retractable set at the bottom of the telescopic rod 9, a connecting sleeve 11 fixed to the bottom of the spring rod 10, and a test pen 12 set at the bottom of the connecting sleeve 11.

[0035] Specifically, in this embodiment, the present invention features a side support frame 1 vertically fixed to the top of the workbench 16. A horizontal crossbar 8 is fixed to the top of the side support frame 1, and a worm gear frame 13 vertically fixed to the bottom of the crossbar 8 is fixed to the bottom of the crossbar 8. A rotating shaft 3 is fixed to the surface of the worm gear frame 13, and a swingable telescopic rod 9 is rotatably connected to the surface of the rotating shaft 3. By swinging the telescopic rod 9, the test pen 12 can swing along the surface of the gearbox 2. The bottom of the telescopic rod 9 is provided with an elastically extendable spring 20 rod 10 for elastic compression, so that the test pen 12 can make close contact with different positions on the surface of the gearbox 2. This allows the test pen 12 to accurately capture the vibration of the surface of the gearbox 2. During the capture process, the vibration sensor 14 identifies the vibration, improving the accuracy of the identification.

[0036] A gearbox 2 is installed on the top of the workbench 16. A corresponding round hole is opened on the top of the workbench 16. Several downward through round holes are opened on the top of the workbench 16. A locking bolt 18 is provided on the bottom surface of the gearbox 2. The locking bolt 18 extends through the round hole to the bottom surface of the workbench 16. A locking nut 19 is provided on the surface of the locking bolt 18 extending out of the bottom surface of the workbench 16.

[0037] Specifically, in this embodiment, the present invention installs a gearbox 2 on the top of a workbench 16. The top of the workbench 16 has corresponding circular holes, and several downward-through circular holes are also present. A locking bolt 18 is provided on the bottom surface of the gearbox 2, extending through the circular holes to the bottom surface of the workbench 16. A locking nut 19 is provided on the surface of the locking bolt 18 extending from the bottom surface of the workbench 16. Through the structural design of the locking bolt 18 and the locking nut 19, the installation firmness of the gearbox 2 is improved, preventing vibration and loosening of the gears inside the gearbox 2 during high-speed rotation. This enhances the structural stability of the gearbox 2 placed on the workbench 16.

[0038] The bottom of the workbench 16 is fixed with a support leg 17 that stands upright on the bottom surface of the workbench 16.

[0039] Specifically, in this embodiment, a support leg 17 is fixed to the bottom of the workbench 16, which stands upright on the bottom surface of the workbench 16, thereby improving the stability of the workbench 16.

[0040] Example 2

[0041] Please see Figure 1-3 This is another technical solution provided by the present invention. This embodiment has the same features as the above embodiment 1, and the similarities will not be described in this embodiment. The specific differences are as follows:

[0042] A high-speed vibration modal testing device for a gearbox includes a workbench 16. A side support frame 1 is vertically fixed to the top of the workbench 16. A horizontal crossbar 8 is fixed to the top of the side support frame 1. A worm gear frame 13 is vertically fixed to the bottom of the crossbar 8. A rotating shaft 3 is fixed to the surface of the worm gear frame 13. A swingable telescopic rod 9 is rotatably connected to the surface of the rotating shaft 3. A spring rod 10 that can be elastically extended and retracted is provided at the bottom of the telescopic rod 9. A connecting sleeve 11 is fixed to the bottom of the spring rod 10. A test pen 12 is provided at the bottom of the connecting sleeve 11.

[0043] Specifically, in this embodiment, the present invention features a side support frame 1 vertically fixed to the top of the workbench 16. A horizontal crossbar 8 is fixed to the top of the side support frame 1, and a worm gear frame 13 vertically fixed to the bottom of the crossbar 8 is fixed to the bottom of the crossbar 8. A rotating shaft 3 is fixed to the surface of the worm gear frame 13, and a swingable telescopic rod 9 is rotatably connected to the surface of the rotating shaft 3. By swinging the telescopic rod 9, the test pen 12 can swing along the surface of the gearbox 2. The bottom of the telescopic rod 9 is provided with an elastically extendable spring 20 rod 10 for elastic compression, so that the test pen 12 can make close contact with different positions on the surface of the gearbox 2. This allows the test pen 12 to accurately capture the vibration of the surface of the gearbox 2. During the capture process, the vibration sensor 14 identifies the vibration, improving the accuracy of the identification.

[0044] A worm gear bracket 7 is fixedly installed on the bottom surface of the horizontal support rod 8. A worm 5 is rotatably connected to the surface of the worm gear bracket 7. A half worm wheel 4 is provided at the top of the telescopic rod 9. The half worm wheel 4 is meshed with the worm 5. An adjustment knob 6 is provided at one end of the worm 5.

[0045] Specifically, in this embodiment, the present invention uses a worm gear bracket 7 fixedly installed on the bottom surface of the horizontal support rod 8. A worm gear 5 is rotatably connected to the surface of the worm gear bracket 7. A semi-worm wheel 4 is provided at the top of the telescopic rod 9. The semi-worm wheel 4 is meshed with the worm gear 5. An adjustment knob 6 is provided at one end of the worm gear 5. By rotating the adjustment knob 6, the worm gear 5 is driven to rotate. During the rotation of the worm gear 5, the semi-worm wheel 4 is driven to swing at an angle. In conjunction with the test pen 12, which is a disc, disc, or wheel structure, it makes sliding contact with the surface of the gearbox 2. This ensures that the test pen 12 can make good contact with the surface of the gearbox 2 no matter what angle the telescopic rod 9 swings, thereby improving the accuracy of test data acquisition.

[0046] The test pen 12 is configured as a disc, disc, or wheel. Regardless of the angle at which the telescopic rod 9 swings, the test pen 12 can make good contact with the surface of the gearbox 2. The disc, disc, or wheel structure can improve the accuracy of test data acquisition.

[0047] The bottom end of the telescopic rod 9 is provided with a spring hole 21 with a circular hole structure. The top end of the spring rod 10 slides into the spring hole 21, and a spring 20 is provided at the top end of the spring rod 10 that extends into the spring hole 21.

[0048] Specifically, in this embodiment, the present invention provides a spring hole 21 with a circular hole structure at the bottom end of the telescopic rod 9. The top end of the spring 20 rod 10 slides into the spring hole 21, and a spring 20 is provided at the top end of the spring 20 rod 10 extending into the spring hole 21. This facilitates elastic adjustment and allows for adaptive adjustment according to the surface contour of the gearbox 2, making it easy to adjust the angle of the telescopic rod 9. If necessary, the test pen 12 can be pushed with a finger for auxiliary adjustment.

[0049] A test shaft 15 is provided on the surface of the connecting sleeve 11, a test pen 12 is provided at one end of the test shaft 15, and a vibration sensor 14 is provided at the other end of the test shaft 15.

[0050] The vibration sensor 14 has a metal shaft inside the test shaft 15 that is connected to the test pen 12.

[0051] This utility model has a test shaft 15 provided on the surface of the connecting sleeve 11, a test pen 12 provided at one end of the test shaft 15, and a vibration sensor 14 provided at the other end of the test shaft 15. The vibration sensor 14 is provided with a metal shaft inside the test shaft 15 and is connected to the test pen 12, thereby improving the accuracy of vibration transmission.

[0052] Among them, vibration sensor 14 is an existing technology. A vibration sensor is a device that can convert mechanical vibration signals (such as displacement, velocity, and acceleration) into electrical signals, and is widely used in fields such as mechanical condition monitoring, fault diagnosis, and structural health monitoring. Its core principles include: piezoelectric effect: materials generate electric charge when subjected to force (such as piezoelectric ceramics). Electromagnetic induction: a coil cuts magnetic field lines in a magnetic field to generate current (such as eddy current). Optical principle: measuring vibration displacement through optical interference or laser vibration measurement technology.

[0053] Vibration sensor 14 is a displacement velocity amplitude vibration sensor manufactured by Weite Intelligent brand. It has the function of monitoring vibration of motors, water pumps and gearboxes and is waterproof. The model number is WT-VB01-485.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vibration modal testing device for a high-speed gearbox, comprising a worktable (16), characterized in that: The top of the workbench (16) is provided with a side support frame (1) that is upright and fixed to the top of the workbench (16). The top of the side support frame (1) is fixed with a horizontal crossbar (8). The bottom of the crossbar (8) is fixed with a worm gear frame (13) that is upright on the bottom surface of the crossbar (8). The surface of the worm gear frame (13) is fixed with a rotating shaft (3). The surface of the rotating shaft (3) is rotatably connected with a swingable telescopic rod (9). The bottom of the telescopic rod (9) is provided with an elastically extendable spring rod (10). The bottom of the spring rod (10) is fixed with a connecting sleeve (11). The bottom of the connecting sleeve (11) is provided with a test pen (12).

2. The gearbox high-speed stage vibration modal testing device according to claim 1, characterized in that: A gearbox (2) is installed on the top of the workbench (16). A corresponding round hole is opened on the top of the workbench (16). Several downward-through round holes are opened on the top of the workbench (16). A locking bolt (18) is provided on the bottom surface of the gearbox (2). The locking bolt (18) extends through the round hole to the bottom surface of the workbench (16). A locking nut (19) is provided on the surface of the locking bolt (18) extending out of the bottom surface of the workbench (16).

3. The gearbox high-speed stage vibration modal testing device according to claim 1, characterized in that: A worm gear bracket (7) is fixedly installed on the bottom surface of the horizontal support rod (8). A worm gear (5) is rotatably connected to the surface of the worm gear bracket (7). A half worm wheel (4) is provided at the top of the telescopic rod (9). The half worm wheel (4) meshes with the worm gear (5). An adjustment knob (6) is provided at one end of the worm gear (5).

4. The gearbox high-speed stage vibration modal testing device according to claim 1, characterized in that: The test pen (12) is configured as a disc, disc, or wheel structure.

5. The gearbox high-speed stage vibration modal testing device according to claim 4, characterized in that: The bottom end of the telescopic rod (9) is provided with a spring hole (21) with a circular hole structure. The top end of the spring rod (10) slides into the spring hole (21), and a spring (20) is provided at the top end of the spring rod (10) that extends into the spring hole (21).

6. The gearbox high-speed stage vibration modal testing device according to claim 5, characterized in that: The surface of the connecting sleeve (11) is provided with a test shaft (15), the test pen (12) is provided at one end of the test shaft (15), and the other end of the test shaft (15) is provided with a vibration sensor (14).

7. The gearbox high-speed stage vibration modal testing device according to claim 6, characterized in that: The vibration sensor (14) has a metal shaft inside the test shaft (15) that is connected to the test pen (12).

8. The gearbox high-speed stage vibration modal testing device according to claim 7, characterized in that: The bottom end of the workbench (16) is fixed with a support leg (17) that stands upright on the bottom surface of the workbench (16).

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