Rotation vibration platform for rolling bearing fault test and use method

Abstract

The invention relates to the technical field of vibration platforms, in particular to a rotary vibration platform for fault testing of a rolling bearing and a use method, and the rotary vibration platform comprises a platform assembly, a detection assembly fixedly connected to the top end of the platform assembly, a transmission assembly mounted at the upper end of the platform assembly, a fastening assembly mounted on the outer side of the transmission assembly, and an adjusting assembly mounted on the outer side of the fastening assembly. The correcting assembly is installed at one end of the adjusting assembly, the transmission assembly comprises a transmission shaft, a first external thread is formed in the outer side of the transmission shaft, a first pressing piece and a second pressing piece are arranged on the outer side of the transmission shaft in a sleeving mode, the first external thread formed in the transmission shaft is in threaded connection with the first internal thread through a sleeve, and the fastening assembly comprises an expansion plate. The device can be compatible with bearings with various diameters, solves the problem of insufficient adaptation of a traditional transmission shaft, avoids repeated disassembly and assembly, improves the efficiency, guarantees uniform load and real working condition simulation through precise clamping, and ensures that test data is attached to real fault characteristics of the bearing.

Description

Technical Field

[0001] This invention relates to the field of vibration platform technology, specifically to a rotating vibration platform for testing rolling bearing failures and its usage method. Background Technology

[0002] Rolling bearings are precision mechanical components that convert the sliding friction between a rotating shaft and its housing into rolling friction. They typically consist of an inner ring, an outer ring, rolling elements, and a cage. They can reduce the coefficient of friction during transmission and ensure the rotational accuracy of the shaft, and are widely used in rotating parts of various mechanical equipment.

[0003] The rotating vibration platform for rolling bearing fault testing is a specialized test equipment that simulates the actual working conditions of bearings. It can adjust parameters such as rotational speed, load, and vibration excitation, and carry the bearing under test to collect data such as vibration signals and temperature changes during its operation. This data is used to analyze the operating characteristics of bearings under different conditions such as normal, wear, and cracks, and to provide experimental support for the verification and optimization of bearing fault diagnosis technology.

[0004] When testing bearings of different diameters, the bearings need to be fixed on a drive shaft directly connected to the motor spindle. Due to the large differences in the inner diameter of the bearings, a drive shaft with a fixed diameter is difficult to be compatible with the inner rings of bearings of various specifications, resulting in insufficient adaptability. If the fixing method is not properly selected, not only will the stiffness of the drive shaft fail to match the installation requirements of different bearings, but it will also easily cause uneven load application, ultimately leading to distortion of the simulation of the actual operating conditions of the bearings. This results in deviations between the collected test data and the actual fault characteristics of the bearings. Therefore, to address the above problems, a rotating vibration platform and its usage method for testing rolling bearing faults are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a rotational vibration platform and method for testing rolling bearing failures, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A rotating vibration platform for testing rolling bearing failures and its usage method include a platform assembly. A detection component is fixedly connected to the top of the platform assembly. A transmission component is installed on the upper end of the platform assembly. A restraining component is installed on the outside of the transmission component. An adjustment component is installed on the outside of the restraining component. A calibration component is installed at one end of the adjustment component. The transmission assembly includes a transmission shaft with a first external thread on its outer side. A first pressure plate and a second pressure plate are sleeved on the outer side of the transmission shaft. The first external thread of the transmission shaft is threadedly connected to a first internal thread through a sleeve. The restraining component includes an expansion plate with a groove on its inner side. An extension cylinder is fixedly connected to the rear end of the expansion plate. Both the expansion plate and the extension cylinder have second internal threads on their inner sides and second external threads on their outer sides. Both the expansion plate and the extension cylinder are threadedly connected to the first external thread through the second internal thread.

[0008] As a further optimization of the present invention, the platform component includes a machine base, the top of which is fixedly connected to the housing of a drive motor. An integrated controller, a speed adjustment button, and a shaft support are fixedly connected to the top of the machine base. A coupling is fixedly connected to the end of the drive motor spindle. The inner side of the coupling is fixedly connected to the rear end of a transmission shaft, and the inner side of the shaft support is rotatably connected to the outer side of the transmission shaft.

[0009] As a further optimization of the present invention, the detection component includes a frame plate, a laser Doppler vibration sensor is fixedly connected to the upper end of the frame plate, and the bottom end of the frame plate is fixedly connected to the top end of the platform component.

[0010] As a further optimization of the present invention, wherein: an electric cylinder is fixedly connected to both the left and right ends of the frame plate, a vertical plate is fixedly connected to the end of the piston rod of the electric cylinder, a spring telescopic rod and a pressure plate are fixedly connected to one side of the vertical plate in sequence, a clamping rod is fixedly connected to both the upper and lower ends of the pressure plate, and stripes are provided on the outer side of the clamping rod.

[0011] As a further optimization of the present invention, the adjusting component includes an adjusting cylinder, an outer ring is rotatably connected to the outer side of the adjusting cylinder, a sliding cylinder is rotatably connected to the inner side of the front end of the outer ring, a plurality of first ear seats are fixedly connected to the outer side of the sliding cylinder, a threaded hole is opened on the inner side of the adjusting cylinder, and the adjusting cylinder is threadedly connected to the outer side of the first external thread through the threaded hole.

[0012] As a further optimization of the present invention, the inner side of the slide cylinder is a hollow structure, the slide cylinder is sleeved on the outside of the first external thread, a gap is provided between the adjusting cylinder and the slide cylinder, a rotating rod is rotatably connected to the inner side of the first lug, and a second lug is rotatably connected to the front end of the rotating rod.

[0013] As a further optimization of the present invention, the front end of the second ear seat is fixedly connected to the rear end of the built-in block included in the correction component, and the built-in block has limiting grooves at both ends. The built-in block is slidably connected to the sliding groove of the expansion plate through the limiting grooves.

[0014] As a further optimization of the present invention, the inner side of the built-in block is provided with a column hole, an anti-detachment piece is slidably connected to the inner side of the column hole, a correction rod is fixedly connected to the inner side of the anti-detachment piece, and the correction rod slides on the inner side of the column hole.

[0015] As a further optimization of the present invention, a rolling bearing is sleeved on the outside of the transmission shaft, and the rolling bearing is clamped by multiple correction rods. The first pressure plate is in close contact with the rear end of the rolling bearing, and the rear end of the second pressure plate is in close contact with the front end of the rolling bearing.

[0016] A method for using a rotating vibration platform for testing rolling bearing failures;

[0017] Step 1: When installing the rolling bearing, the first pressure plate is sleeved on the outside of the drive shaft, and the rear end of the first pressure plate is in contact with the front end of the expansion plate. The rolling bearing is sleeved on the outside of the drive shaft. The rolling bearing is moved backward, and the rear end of the rolling bearing is in contact with the front end of the first pressure plate. The second pressure plate is sleeved on the outside of the drive shaft. The second pressure plate is moved backward, and the rear end of the second pressure plate is in contact with the front end of the rolling bearing. The sleeve is sleeved on the outside of the drive shaft. The sleeve is threaded to the first external thread of the drive shaft through the first internal thread. The sleeve is rotated to move backward. The adjusting cylinder is operated to move multiple correction components. Multiple correction rods clamp the outer periphery of the rolling bearing. The axis of the rolling bearing coincides with the axis of the drive shaft. The sleeve is operated, and the first pressure plate and the second pressure plate clamp and fix the rolling bearing.

[0018] Step 2: When calibrating the position of the rolling bearing, the rolling bearing is aligned with multiple calibration rods, the adjusting cylinder is threaded to the second external thread, the adjusting cylinder moves backward, and the adjusting cylinder pulls the slide cylinder and the first ear seat backward through the ring. After the first ear seat moves backward, it pulls the rotating rod through the first ear seat, and the first ear seat and the second ear seat rotate and engage. The second ear seat drives the built-in block to move towards the inner circumference of the expansion plate. The built-in block slides and engages with the slide groove through the limiting groove. The built-in block drives the calibration rods to move towards the rolling bearing. Multiple calibration rods squeeze the rolling bearing, and the axis of the rolling bearing is calibrated.

[0019] Step 3: During testing, start the two electric cylinders. The electric cylinders drive the vertical plate, spring telescopic rod, pressure plate and clamp rod to move simultaneously. After the clamp rod is in close contact with the outer periphery of the rolling bearing, the clamp rod pushes the pressure plate to squeeze the spring telescopic rod, causing the spring telescopic rod to retract. Operate the speed adjustment button to control the drive motor to start through the integrated controller. The drive motor drives the transmission shaft, the clamping assembly, the adjustment assembly and the correction assembly to rotate simultaneously. The transmission shaft drives the inner ring of the rolling bearing to rotate.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, by using a spring telescopic rod, a clamping rod, and a laser Doppler vibration sensor, the device can achieve compatibility and adaptation with various bearings of different diameters, effectively solving the problem of insufficient compatibility of traditional fixed-diameter drive shafts. It eliminates the need for repeated disassembly and reassembly of the connection structure between the drive shaft and the motor spindle, significantly improving installation efficiency. Precise clamping and fixing ensure uniform load application, guaranteeing the authenticity of the bearing's actual operating conditions simulation and avoiding deviations between the collected test data and the actual fault characteristics of the bearing.

[0022] 2. In this invention, through the set adjustment components and correction components, the device can be applied to the shaft center correction of bearings of various sizes. It can accurately adjust the bearing shaft center to coincide with the transmission shaft center, effectively avoid unexpected vibration caused by shaft center offset when the transmission shaft rotates, ensure the stability of bearing operation, lay the foundation for the accuracy of subsequent test data, and further improve the reliability of fault testing.

[0023] 3. In this invention, the detection components ensure both the reliability of the fixed position and the normal vibration of the outer ring of the bearing. It can realistically simulate the working condition of the bearing when the outer ring is fixed and the inner ring rotates during actual operation. The laser interferometry test method can accurately capture the Doppler frequency shift generated by the bearing vibration. After conversion and calculation, the core parameters such as vibration velocity, displacement, and acceleration can be accurately obtained, which greatly improves the authenticity and accuracy of the test results. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the platform component structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the detection component structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the frame structure of the present invention;

[0028] Figure 5 This is a cross-sectional structural diagram of the transmission component of the present invention;

[0029] Figure 6 This is a cross-sectional structural diagram of the confinement component of the present invention;

[0030] Figure 7 This is a cross-sectional structural diagram of the adjustment component of the present invention;

[0031] Figure 8 This is an exploded view of the regulating component of the present invention;

[0032] Figure 9 This is a cross-sectional structural diagram of the correction component of the present invention.

[0033] In the diagram: 1. Platform component; 11. Machine base; 12. Drive motor; 13. Integrated controller; 14. Speed ​​control button; 15. Coupling; 16. Shaft support;

[0034] 2. Detection components; 21. Frame plate; 22. Laser Doppler vibration sensor; 23. Electric cylinder; 24. Vertical plate; 25. Spring telescopic rod; 26. Pressure plate; 27. Clamping rod;

[0035] 3. Transmission assembly; 31. Drive shaft; 32. First external thread; 33. First pressure plate; 34. Second pressure plate; 35. Sleeve; 36. First internal thread;

[0036] 4. Confinement component; 41. Expansion plate; 42. Slide groove; 43. Extension cylinder; 44. Second internal thread; 45. Second external thread;

[0037] 5. Adjustment assembly; 51. Adjustment cylinder; 52. Ring; 53. Slide cylinder; 54. First ear seat; 55. Rotating rod; 56. Second ear seat;

[0038] 6. Correction assembly; 61. Built-in block; 62. Column hole; 63. Limiting groove; 64. Correction rod; 65. Anti-detachment plate;

[0039] 7. Rolling bearings. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] Please see Figures 1-9 The present invention provides a technical solution:

[0043] A rotating vibration platform for testing rolling bearing failures and its usage method include a platform assembly 1, a detection assembly 2 fixedly connected to the top of the platform assembly 1, a transmission assembly 3 installed on the upper end of the platform assembly 1, a restraining assembly 4 installed on the outside of the transmission assembly 3, an adjustment assembly 5 installed on the outside of the restraining assembly 4, and a calibration assembly 6 installed at one end of the adjustment assembly 5. The transmission assembly 3 includes a transmission shaft 31, with a first external thread 32 on the outside of the transmission shaft 31, and a first pressure plate 33 and a second pressure plate 34 sleeved on the outside of the transmission shaft 31. The first external thread 32 of the transmission shaft 31 is threadedly connected to a first internal thread 36 through a sleeve 35. The restraining assembly 4 includes an expansion plate 41, with a groove 42 on the inner side of the expansion plate 41, and an extension cylinder 43 fixedly connected to the rear end of the expansion plate 41. Both the expansion plate 41 and the extension cylinder 43 have a second internal thread 44 on their inner sides, and a second external thread 45 on the outer side of the extension cylinder 43. Both the expansion plate 41 and the extension cylinder 43 are threadedly connected to the first external thread 32 through the second internal thread 44.

[0044] As a further implementation of this solution, platform component 1 includes a machine base 11. The top of the machine base 11 is fixedly connected to the housing of the drive motor 12. An integrated controller 13, a speed control button 14, and a shaft support 16 are fixedly connected to the top of the machine base 11. A coupling 15 is fixedly connected to the end of the main shaft of the drive motor 12. The inner side of the coupling 15 is fixedly connected to the rear end of the transmission shaft 31, and the inner side of the shaft support 16 is rotatably connected to the outer side of the transmission shaft 31. Through the above arrangement, the machine base 11 serves as a load-bearing foundation, and the overall structure is stably supported by fixing it to the housing of the drive motor 12. The integrated controller 13... The fixed setting of the speed adjustment button 14 provides an installation carrier for the start control of the drive motor 12, ensuring the convenience and reliability of power control. The coupling 15 realizes the stable transmission between the main shaft of the drive motor 12 and the transmission shaft 31, ensuring that the power of the drive motor 12 can be accurately transmitted to the transmission shaft 31. At the same time, the rotational connection design between the shaft support 16 and the transmission shaft 31 does not hinder the normal rotation of the transmission shaft 31, but also provides auxiliary support for the transmission shaft 31, improving the coaxiality and stability of the transmission shaft 31 during rotation, laying a structural foundation for the smooth operation of the subsequent rolling bearing 7.

[0045] As a further implementation of this solution, the detection component 2 includes a frame plate 21. A laser Doppler vibration sensor 22 is fixedly connected to the upper end of the frame plate 21, and the bottom end of the frame plate 21 is fixedly connected to the top end of the platform component 1. Through the above configuration, the frame plate 21 serves as the load-bearing frame of the detection component 2. By being fixedly connected to the top end of the platform component 1, the overall structure of the detection component 2 is stably assembled, ensuring the reliability of the test. The fixed configuration of the laser Doppler vibration sensor 22 provides a stable emission carrier for laser interference testing, ensuring that the laser can be accurately focused and projected onto the vibration surface of the tested bearing rolling bearing 7, avoiding laser projection deviation due to unstable installation. This provides structural protection for subsequent accurate capture of Doppler frequency shift and accurate acquisition of vibration parameters. At the same time, the overall connection method enables the detection component 2 to work collaboratively with the main body of the device, improving the integration and stability of the test system.

[0046] As a further implementation of this solution, electric cylinders 23 are fixedly connected to both the left and right ends of the frame plate 21. A vertical plate 24 is fixedly connected to the end of the piston rod of the electric cylinder 23. A spring telescopic rod 25 and a pressure plate 26 are sequentially fixedly connected to one side of the vertical plate 24. Clamping rods 27 are fixedly connected to both the upper and lower ends of the pressure plate 26. Stripes are formed on the outer side of the clamping rods 27. Through this arrangement, the electric cylinders 23 are symmetrically fixed at both ends of the frame plate 21, ensuring balanced driving force on both sides. This provides a symmetrical force basis for the subsequent contact between the clamping rods 27 and the rolling bearing 7. The electric cylinders 23 drive the vertical plate 24, spring telescopic rod 25, pressure plate 26, and clamping rods 27 to move synchronously through the piston rod, achieving the desired contact. The matching clamping of the same diameter rolling bearing 7 and the setting of the double spring telescopic rod 25 enhance the elastic buffering performance. When the clamping rod 27 is in close contact with the rolling bearing 7, the contraction force of the spring telescopic rod 25 can make the clamping rod 27 and the rolling bearing 7 fit tightly and generate stable friction force, while not affecting the normal vibration of the outer ring of the rolling bearing 7, ensuring the realism of the working condition simulation. The symmetrical arrangement of the clamping rod 27 can limit the outer ring of the rolling bearing 7 from multiple directions. The stripes on the outside further increase the friction force between it and the rolling bearing 7, preventing the outer ring of the rolling bearing 7 from sliding relative to each other during the test, ensuring the reliability of the outer ring fixation, and providing stable conditions for the working condition simulation of the inner ring rotation.

[0047] As a further implementation of this solution, the adjustment component 5 includes an adjustment cylinder 51. A ring 52 is rotatably connected to the outer side of the adjustment cylinder 51, and a slide cylinder 53 is rotatably connected to the inner side of the front end of the ring 52. Multiple first ear seats 54 are fixedly connected to the outer side of the slide cylinder 53. A threaded hole is opened on the inner side of the adjustment cylinder 51. The adjustment cylinder 51 is threadedly connected to the outer side of the first external thread 32 through the threaded hole. Through the above settings, the adjustment cylinder 51 realizes the conversion of rotational motion to linear motion through the threaded connection of the threaded hole to the first external thread 32, providing precise power for the subsequent clamping and correction mechanism. The rotatable connection design of the ring 52 with the adjustment cylinder 51 and the slide cylinder 53 effectively avoids the slide cylinder 53 from twisting when the adjustment cylinder 51 rotates, ensuring the stability and directionality of the movement of the slide cylinder 53 and subsequent connecting parts. The symmetrical fixed arrangement of multiple first ear seats 54 enables the driving force to be evenly transmitted to the subsequent correction component 6, ensuring the balanced clamping and correction force on the rolling bearing 7, avoiding correction deviation due to uneven force, and adapting to the correction requirements of bearings of different diameters, thus improving the compatibility of the device.

[0048] As a further implementation of this solution, the inner side of the slide cylinder 53 is hollow. The slide cylinder 53 is fitted onto the outer side of the first external thread 32. A gap is provided between the adjusting cylinder 51 and the slide cylinder 53. A rotating rod 55 is rotatably connected to the inner side of the first lug 54, and a second lug 56 is rotatably connected to the front end of the rotating rod 55. Through the above arrangement, the hollow structure of the slide cylinder 53 and the design of fitting onto the first external thread 32 achieve a sliding fit with the first external thread 32, ensuring that the slide cylinder 53 moves smoothly along the axial direction of the first external thread 32, while saving installation space and improving efficiency. To enhance structural compactness, the spacing between the adjusting cylinder 51 and the sliding cylinder 53 provides ample space for the rotation and axial movement of the adjusting cylinder 51, avoiding interference between the two movements and ensuring smooth operation of the mechanism. The rotating rod 55 is rotatably connected to the first ear seat 54 and the second ear seat 56, flexibly converting the linear motion of the first ear seat 54 into the transmission motion of the second ear seat 56, achieving stable power transmission, while adapting to the force transmission requirements at different angles during the calibration process, ensuring the coordination of the calibration mechanism's actions, and improving the accuracy of bearing shaft alignment.

[0049] As a further implementation of this solution, the front end of the second ear seat 56 is fixedly connected to the rear end of the built-in block 61 included in the correction component 6. Both ends of the built-in block 61 are provided with limiting grooves 63. The built-in block 61 is slidably connected to the sliding groove 42 provided in the expansion plate 41 through the limiting grooves 63. Through the above settings, the fixed connection between the second ear seat 56 and the built-in block 61 realizes the direct transmission of power, ensuring that the correction driving force can be accurately applied to the built-in block 61. The sliding connection design of the limiting groove 63 and the sliding groove 42 provides a guiding effect for the movement of the built-in block 61, ensuring that the built-in block 61 moves smoothly along the set direction and avoiding inaccurate clamping correction due to movement deviation. This sliding fit structure also ensures the smoothness of movement, reduces frictional resistance, and enables the built-in block 61 to respond quickly to the driving action, improving the efficiency of the installation and correction of the bearing rolling bearing 7, and adapting to the movement requirements of different strokes, further enhancing the compatibility and adaptability of the device to bearings of different diameters.

[0050] As a further implementation of this solution, a column hole 62 is provided on the inner side of the built-in block 61. An anti-detachment plate 65 is slidably connected to the inner side of the column hole 62, and a correction rod 64 is fixedly connected to the inner side of the anti-detachment plate 65. The correction rod 64 slides on the inner side of the column hole 62. Through the above-mentioned arrangement, the sliding connection design between the column hole 62 and the anti-detachment plate 65 enables the correction rod 64 to have an adjustable stroke. It can flexibly adjust the extension length according to the diameter of the bearing rolling bearing 7, so as to achieve precise clamping of bearings of different specifications. As a direct clamping component, the sliding adjustment function of the correction rod 64 ensures that multiple correction rods 64 can synchronously fit against the outer ring of the bearing rolling bearing 7, ensuring uniform distribution of clamping force and avoiding damage to the bearing or unstable clamping due to excessive local force. At the same time, the sliding structure provides a certain buffer during the clamping process. Combined with the shaft center correction action, it can more accurately adjust the alignment of the bearing rolling bearing 7 shaft center with the transmission shaft 31 shaft center, effectively avoiding unexpected vibration caused by shaft center offset during rotation and ensuring the stability of the testing process.

[0051] As a further implementation of this solution, a rolling bearing 7 is fitted onto the outer side of the drive shaft 31. The outer side of the rolling bearing 7 is clamped by multiple straightening rods 64. The first pressure plate 33 is in close contact with the rear end of the rolling bearing 7, and the rear end of the second pressure plate 34 is in close contact with the front end of the rolling bearing 7. Through the above arrangement, the assembly method of fitting the rolling bearing 7 onto the outer side of the drive shaft 31 simplifies the bearing installation process. Combined with the front and rear positioning of the first pressure plate 33 and the second pressure plate 34 and the peripheral clamping of the multiple straightening rods 64, a dual fixing structure of "front and rear limiting + peripheral centering" is formed. The first pressure plate 33 and the second pressure plate 34 are respectively in close contact with the front and rear ends of the rolling bearing 7. This design achieves precise axial positioning of the bearing, preventing axial movement during testing. The clamping action of multiple correction rods 64 ensures accurate radial positioning of the bearing, aligning the axis of the rolling bearing 7 with the axis of the drive shaft 31. Furthermore, this structure can adapt to rolling bearings 7 of different diameters, solving the problem of insufficient compatibility with traditional fixed-diameter drive shafts. It eliminates the need for repeated disassembly and reassembly of the connection between the drive shaft 31 and the drive motor 12, significantly improving installation efficiency. The uniform clamping force ensures even load application, guaranteeing the realism of the simulated operating conditions and ensuring that the collected test data matches the actual bearing fault characteristics, thus improving the accuracy of the test results.

[0052] Workflow: When installing the rolling bearing 7, firstly, the first pressure plate 33 is fitted onto the outside of the drive shaft 31 until the rear end of the first pressure plate 33 is in contact with the front end of the expansion plate 41. Then, the rolling bearing 7 is fitted onto the outside of the drive shaft 31 and moved backward until the rear end of the rolling bearing 7 is in contact with the front end of the first pressure plate 33. At the same time, the rolling bearing 7 is positioned between multiple correction rods 64. Next, the second pressure plate 34 is fitted onto the outside of the drive shaft 31 and moved backward until the rear end of the second pressure plate 34 is in contact with the front end of the rolling bearing 7. Then, the sleeve 35 is fitted onto the outside of the drive shaft 31. The sleeve 35 is threadedly connected to the first external thread 32 of the drive shaft 31 through the first internal thread 36. By rotating the sleeve 35, the sleeve 35 is moved backward. The outer periphery of the selected second pressure plate 34 and the first pressure plate 33 is directly... The diameter of the roller bearing 7 is matched with the inner ring diameter. By operating the adjusting cylinder 51, multiple correction components 6 are displaced. Multiple correction rods 64 clamp the outer periphery of the roller bearing 7, so that the axis of the roller bearing 7 coincides with the axis of the drive shaft 31. The sleeve 35 is operated again. When the sleeve 35 moves, the sleeve 35 will squeeze the second pressure plate 34. Through the reaction force of the expansion plate 41, the first pressure plate 33 and the second pressure plate 34 will form a clamping and fixing effect on the roller bearing 7, thus completing the installation of the roller bearing 7. This installation method can be used for testing bearings with different diameters, is compatible with multiple specifications of bearing inner rings, improves adaptability, and eliminates the need for repeated disassembly and assembly between the drive shaft 31 and the drive motor 12. At the same time, this fixing method can ensure that the load is applied evenly, so that the collected test data is consistent with the actual fault characteristics of the bearing.

[0053] When calibrating the position of the rolling bearing 7, following the same principle, after the rolling bearing 7 is aligned with the multiple calibration rods 64, the adjusting cylinder 51 is operated. The adjusting cylinder 51 is threadedly connected to the second external thread 45. At this time, the adjusting cylinder 51 moves backward. The adjusting cylinder 51 pulls the slide cylinder 53 and the first ear seat 54 backward through the ring 52. The setting of the ring 52 does not affect the rotation of the sliding cylinder 53 when the adjusting cylinder 51 rotates. After the first ear seat 54 moves backward, it pulls the rotating rod 55, and the first ear seat 54 and the second ear seat 56 rotate in cooperation. The pulling action of the first ear seat 54 causes the second ear seat 56 to move the inner block 61 towards the inner circumference of the expansion plate 41. The inner block 61 slides with the slide groove 42 through the limiting groove 63. The inner block 61 drives the correction rod 64 to move towards the rolling bearing 7. At this time, multiple correction rods 64 squeeze the rolling bearing 7, so that the axis of the rolling bearing 7 is corrected, thereby preventing the transmission shaft 31 from causing unexpected vibration due to the misalignment between the axis of the rolling bearing 7 and the axis of the transmission shaft 31 when rotating. At the same time, this correction can be applied to rolling bearings 7 of various sizes.

[0054] During testing, two electric cylinders 23 are activated simultaneously. Cylinder 23 drives the vertical plate 24, spring telescopic rod 25, pressure plate 26, and clamping rod 27 to move simultaneously until the clamping rod 27 is in close contact with the outer periphery of the rolling bearing 7. At this point, under the action of the reaction force, the clamping rod 27 pushes the pressure plate 26 to squeeze the spring telescopic rod 25, causing the spring telescopic rod 25 to contract. The elasticity of the spring telescopic rod 25 increases the friction between the clamping rod 27 and the rolling bearing 7. Simultaneously, the stripes on the outer periphery of the clamping rod 27 further increase the friction between it and the rolling bearing 7. The spring telescopic rod 25 does not affect the normal vibration of the outer ring of the rolling bearing 7. By operating the speed control button 14, the integrated controller 13 starts the drive motor 12. The drive motor 12 drives the transmission shaft 31, the clamping assembly 4, the adjusting assembly 5, and the correction assembly 6 to rotate simultaneously. The moving shaft 31 drives the inner ring of the rolling bearing 7 to rotate. Since the outer ring of the rolling bearing 7 is fixed, this can simulate the operation of the rolling bearing 7. A monochromatic, coherent laser beam is emitted by the laser Doppler vibration sensor 22 and focused onto the vibrating surface of the rolling bearing 7 under test. A portion of the laser beam is separated as a reference beam, which forms an interference basis with the reflected light. The scattered light reflected from the bearing's vibrating surface is received. The frequency of the reflected light will undergo a Doppler frequency shift due to the bearing vibration. The reflected light and the reference light are optically interfered. The photodetector converts the interference light signal into an electrical signal, and then calculates the frequency shift through a demodulation algorithm. Finally, it is converted into the vibration velocity, displacement, or acceleration parameters of the bearing. This test method can simulate the actual rotation of the outer ring of the rolling bearing 7 during actual operation, improving the authenticity and accuracy of the rolling bearing 7 test results.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotating vibration platform for testing rolling bearing failures, comprising a platform assembly (1), characterized in that: The platform component (1) is fixedly connected to the top of a detection component (2). A transmission component (3) is installed on the upper end of the platform component (1). A restraining component (4) is installed on the outside of the transmission component (3). An adjusting component (5) is installed on the outside of the restraining component (4). A calibration component (6) is installed at one end of the adjusting component (5). The transmission component (3) includes a transmission shaft (31). A first external thread (32) is opened on the outside of the transmission shaft (31). A first pressure plate (33) and a second pressure plate (34) are sleeved on the outside of the transmission shaft (31). The transmission shaft (31) has... The first external thread (32) is threadedly connected to the first internal thread (36) through the sleeve (35). The confinement assembly (4) includes an expansion plate (41). A groove (42) is provided on the inner side of the expansion plate (41). An extension tube (43) is fixedly connected to the rear end of the expansion plate (41). A second internal thread (44) is provided on the inner side of both the expansion plate (41) and the extension tube (43). A second external thread (45) is provided on the outer side of the extension tube (43). The expansion plate (41) and the extension tube (43) are threadedly connected to the first external thread (32) through the second internal thread (44).

2. The rotating vibration platform for testing rolling bearing faults according to claim 1, characterized in that: The platform component (1) includes a machine base (11), the top of which is fixedly connected to the housing of a drive motor (12). An integrated controller (13), a speed adjustment button (14), and a shaft support (16) are fixedly connected to the top of the machine base (11). A coupling (15) is fixedly connected to the end of the main shaft of the drive motor (12). The inner side of the coupling (15) is fixedly connected to the rear end of the transmission shaft (31), and the inner side of the shaft support (16) is rotatably connected to the outer side of the transmission shaft (31).

3. The rotating vibration platform for testing rolling bearing faults according to claim 1, characterized in that: The detection component (2) includes a frame plate (21), a laser Doppler vibration sensor (22) is fixedly connected to the upper end of the frame plate (21), and the bottom end of the frame plate (21) is fixedly connected to the top end of the platform component (1).

4. The rotating vibration platform for testing rolling bearing faults according to claim 3, characterized in that: Electric cylinders (23) are fixedly connected to the left and right ends of the frame plate (21). A vertical plate (24) is fixedly connected to the piston rod end of the electric cylinder (23). A spring telescopic rod (25) and a pressure plate (26) are fixedly connected to one side of the vertical plate (24). A clamping rod (27) is fixedly connected to the upper and lower ends of the pressure plate (26). Stripes are opened on the outer side of the clamping rod (27).

5. The rotating vibration platform for testing rolling bearing faults according to claim 1, characterized in that: The adjustment assembly (5) includes an adjustment cylinder (51), a ring (52) is rotatably connected to the outside of the adjustment cylinder (51), a slide cylinder (53) is rotatably connected to the inside of the front end of the ring (52), a plurality of first ear seats (54) are fixedly connected to the outside of the slide cylinder (53), a threaded hole is opened on the inside of the adjustment cylinder (51), and the adjustment cylinder (51) is threadedly connected to the outside of the first external thread (32) through the threaded hole.

6. The rotating vibration platform for testing rolling bearing faults according to claim 5, characterized in that: The inner side of the slide cylinder (53) is hollow. The slide cylinder (53) is sleeved on the outside of the first external thread (32). There is a gap between the adjusting cylinder (51) and the slide cylinder (53). The inner side of the first ear seat (54) is rotatably connected to the rotating rod (55). The front end of the rotating rod (55) is rotatably connected to the second ear seat (56).

7. The rotating vibration platform for testing rolling bearing faults according to claim 6, characterized in that: The front end of the second ear seat (56) is fixedly connected to the rear end of the built-in block (61) included in the correction component (6). Both ends of the built-in block (61) are provided with limiting grooves (63). The built-in block (61) is slidably connected to the slide groove (42) provided in the expansion plate (41) through the limiting grooves (63).

8. The rotating vibration platform for testing rolling bearing faults according to claim 7, characterized in that: The inner side of the built-in block (61) is provided with a column hole (62), and an anti-detachment piece (65) is slidably connected to the inner side of the column hole (62). A correction rod (64) is fixedly connected to the inner side of the anti-detachment piece (65), and the correction rod (64) slides on the inner side of the column hole (62).

9. The rotating vibration platform for testing rolling bearing faults according to claim 1, characterized in that: A rolling bearing (7) is sleeved on the outside of the drive shaft (31). The rolling bearing (7) is clamped by multiple correction rods (64) on the outside. The first pressure plate (33) is in close contact with the rear end of the rolling bearing (7), and the rear end of the second pressure plate (34) is in close contact with the front end of the rolling bearing (7).

10. A method of using a rotating vibration platform for testing rolling bearing faults according to any one of claims 1-9, characterized in that: Step 1: When installing the rolling bearing (7), the first pressure plate (33) is fitted onto the outside of the drive shaft (31), with the rear end of the first pressure plate (33) fitting against the front end of the expansion plate (41). The rolling bearing (7) is fitted onto the outside of the drive shaft (31). The rolling bearing (7) is moved backward, with the rear end of the rolling bearing (7) fitting against the front end of the first pressure plate (33). The second pressure plate (34) is fitted onto the outside of the drive shaft (31). The second pressure plate (34) is moved backward, with the rear end of the second pressure plate (34) fitting against the front end of the rolling bearing (7). The sleeve (35) is fitted onto the outside of the drive shaft (31). On the outside of the drive shaft (31), the sleeve (35) is threadedly connected to the first external thread (32) of the drive shaft (31) through the first internal thread (36). Rotating the sleeve (35) causes the sleeve (35) to move backward. Operating the adjusting cylinder (51) causes multiple correction components (6) to move. Multiple correction rods (64) clamp the outer periphery of the rolling bearing (7). The axis of the rolling bearing (7) coincides with the axis of the drive shaft (31). Operating the sleeve (35) causes the first pressure plate (33) and the second pressure plate (34) to clamp and fix the rolling bearing (7). Step 2: When calibrating the position of the rolling bearing (7), the rolling bearing (7) is aligned with multiple calibrating rods (64), the adjusting cylinder (51) is threadedly connected to the second external thread (45), the adjusting cylinder (51) moves backward, the adjusting cylinder (51) pulls the slide cylinder (53) and the first ear seat (54) backward through the ring (52), after the first ear seat (54) moves backward, the rotating rod (55) is pulled through the first ear seat (54), the first ear seat (54) and the second ear seat (56) rotate and cooperate, the second ear seat (56) drives the built-in block (61) to move towards the inner circumference of the expansion plate (41), the built-in block (61) slides and cooperates with the slide groove (42) through the limiting groove (63), the built-in block (61) drives the calibrating rod (64) to move towards the rolling bearing (7), the multiple calibrating rods (64) squeeze the rolling bearing (7), and the axis of the rolling bearing (7) is calibrated; Step 3: During the test, start the two electric cylinders (23). The electric cylinders (23) drive the vertical plate (24), spring telescopic rod (25), pressure plate (26) and clamp rod (27) to move simultaneously. After the clamp rod (27) is in close contact with the outer periphery of the rolling bearing (7), the clamp rod (27) pushes the pressure plate (26) to squeeze the spring telescopic rod (25). The spring telescopic rod (25) retracts. The speed adjustment button (14) controls the drive motor (12) to start through the integrated controller (13). The drive motor (12) drives the transmission shaft (31), the clamping component (4), the adjustment component (5) and the correction component (6) to rotate simultaneously. The transmission shaft (31) drives the inner ring of the rolling bearing (7) to rotate.

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