Tapered roller bearing online fault platform

Abstract

The utility model relates to an online fault platform for a tapered roller bearing. The online fault platform comprises an outer ring clamping device, an inner ring fixing device, a laser device, a carrying manipulator and a rotating shaft, an inner ring of the tapered roller bearing is in interference fit with the rotating shaft, an outer ring of the tapered roller bearing is fixed in the outer ring clamping device, the inner ring fixing device is fixed on the rotating shaft, and one end of the inner ring fixing device abuts against the end face of the inner ring. Under the condition of not moving any position of the inner ring of the tapered roller bearing, the outer ring of the tapered roller bearing is in a free state and is grabbed by the carrying manipulator to move along the axial direction, so that the online fault prefabrication experiment of the faults of the retainer and the tapered roller of the tapered roller bearing and the fine adjustment of the rotating shaft by the motor are realized; and then, the laser device can sinter certain positions of the retainer and the tapered roller by utilizing multiple degrees of freedom to realize prefabrication of a single fault or a plurality of faults. And the rotating shaft can be sintered to realize coupling fault.

Description

Technical Field

[0001] This utility model belongs to the field of online monitoring of rotor system test benches, specifically relating to an online fault platform for tapered roller bearings, which performs online fault detection on tapered roller bearings. Background Technology

[0002] Current rotor system test benches generally perform single-fault experiments, and most importantly, they cannot perform online fault monitoring. Many companies require online monitoring systems, but moving the bearing causes significant positional changes, severely impacting test accuracy and precision. Adding faults without moving the bearing ensures timely fault detection and improves accuracy without altering the bearing's position. Furthermore, adding coupled faults enhances the test bench's practicality. Therefore, there is an urgent need for a utility model of an online fault monitoring platform and method for tapered roller bearing-rotor systems. Utility Model Content

[0003] This utility model provides an online fault monitoring platform for tapered roller bearings. The technical problem to be solved is that the test bench for rotor systems, especially tapered roller bearings, cannot perform online fault monitoring.

[0004] To address the above technical problems, this utility model provides an online fault diagnosis platform for tapered roller bearings, characterized by: an outer ring clamping device, an inner ring fixing device, a laser device, and a rotating shaft; two tapered roller bearings are symmetrically mounted on the rotating shaft; the inner ring of the tapered roller bearing is connected to the rotating shaft via an interference fit; the outer ring of the tapered roller bearing is fixed in the outer ring clamping device; the inner ring fixing device is fixed on the rotating shaft, and its end is in a pressing contact with the end face of the inner ring of the tapered roller bearing; the laser device is used to sinter the positions of the cage, tapered rollers, and outer ring of the tapered roller bearing to pre-determine single or multiple faults.

[0005] Beneficial effects: This invention allows the moving block to move outwards and to both sides along the Y direction without moving the inner ring of the bearing, leaving the outer ring of the bearing in a free state. A robotic arm then grasps the outer ring and moves it axially, enabling online pre-fault testing of the tapered roller bearing cage and tapered rollers. The motor fine-tunes the shaft to a specific position, and then a laser device, utilizing multiple degrees of freedom, can sinter certain locations on the cage and tapered rollers to pre-fabricate single or multiple faults. It can also sinter the shaft to achieve coupled faults. Attached Figure Description

[0006] Figure 1 This is a structural schematic diagram of the present invention.

[0007] Figure 2 This is a schematic diagram of the inner ring fixing device.

[0008] Figure 3 This is a schematic diagram of the outer ring clamping device 2.

[0009] Figure 4 This is a schematic diagram of the overall structure of the present invention. Detailed Implementation

[0010] To make the purpose, content and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below.

[0011] The present invention proposes an online fault platform for tapered roller bearings, comprising outer ring clamping devices 2 and 5, inner ring fixing devices 3 and 4, laser device 6, handling robot 7, and rotating shaft 8;

[0012] Two tapered roller bearings are symmetrically mounted on the rotating shaft 8. The inner ring of the tapered roller bearing is connected to the rotating shaft 8 by an interference fit, and the outer ring of the tapered roller bearing is fixed in the outer ring clamping device 2, achieving axial fixation of the outer ring in the X direction. The rotating shaft is driven to rotate by a motor.

[0013] The outer ring clamping device 2 includes a base, moving blocks 21 and 23, a fixed block 22, and a telescopic device 24. The fixed block 22 is installed on the base. The outer ring clamping device 2 uses the moving blocks 21 and 23 to move along the slide groove on the fixed block 22 in the Y direction, i.e., laterally, and is fixed by bolts and threaded devices to achieve the outer ring clamping function.

[0014] The telescopic device 24 can move the fixed block 22 up and down by extending and retracting the hydraulic cylinder to match different bearing models.

[0015] Due to its structural properties, the tapered roller bearing is fixed at one end by the outer ring in the X direction, while the other end requires the inner ring fixing device 3 to press against the inner ring. The inner ring fixing device 3 is equipped with piezoelectric ceramics 31, bolt devices 32, and threaded array holes 33. The inner ring fixing device is fixed to the rotating shaft 8 by the bolt devices 32. Piezoelectric ceramics 31 are arranged circumferentially at the end of the inner ring fixing device 3, with the top of the piezoelectric ceramics making contact with the end face of the inner ring. Axial expansion and contraction of the piezoelectric ceramics are achieved by controlling the voltage, thus applying different preloads to the inner ring. The rotating shaft 8 has threaded holes 81 at different distances, which are bolted to the bolt devices 32. The bolt devices 32 are fixed symmetrically to reduce the impact of dynamic balance. The span between the left and right bearings is adjusted according to the different distances of the threaded holes 81 to achieve experiments with different spans. Simultaneously, dynamic balance experiments are achieved by placing mass blocks (small bolts) of different weights in the threaded array holes 33. The fixing method for the inner rings of the left and right bearings is similar.

[0016] Without moving the inner ring of the tapered roller bearing to any position, taking the left bearing as an example, moving blocks 21 and 23 move outwards and to both sides along the Y direction, allowing the outer ring of the bearing to be in a free state. The robotic arm 7 then grasps the outer ring and moves it along the axial X direction, ensuring that the positions of the tapered roller bearing cage and tapered rollers remain unchanged, and enabling online pre-fault testing. The motor fine-tunes the shaft to a specific position, and then the laser device 6, utilizing multiple degrees of freedom, can sinter certain positions of the cage, tapered rollers, and outer ring to pre-fabricate single or multiple faults. Simultaneously, it can also sinter the shaft 8 to achieve pre-fault testing of shaft coupling defects, etc.

[0017] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An online fault platform for tapered roller bearings, characterized in that: It includes an outer ring clamping device, an inner ring fixing device, a laser device, and a rotating shaft; two tapered roller bearings are symmetrically mounted on the rotating shaft; the inner ring of the tapered roller bearing is connected to the rotating shaft by an interference fit; the outer ring of the tapered roller bearing is fixed in the outer ring clamping device; the inner ring fixing device is fixed on the rotating shaft, and its end is in pressure contact with the end face of the inner ring of the tapered roller bearing; the laser device is used to sinter the cage, tapered rollers, and outer ring of the tapered roller bearing to pre-fabricate single or multiple faults.

2. The online fault platform for tapered roller bearings according to claim 1, characterized in that: The motor drives the shaft to rotate.

3. The online fault platform for tapered roller bearings according to claim 1, characterized in that: The outer ring clamping device includes a base, a moving block, and a fixed block; the fixed block is installed on the base, the moving block and the fixed block are slidably connected to achieve lateral movement, and are fixed together by bolts.

4. The online fault platform for tapered roller bearings according to claim 3, characterized in that: The outer ring clamping device also includes a telescopic device, which moves the fixed block up and down to match different bearing models by telescopic movement.

5. The online fault platform for tapered roller bearings according to claim 1, characterized in that: The inner ring fixing device is equipped with a piezoelectric ceramic at its end, and the top of the piezoelectric ceramic is in pressure contact with the end face of the inner ring of the tapered roller bearing.

6. The online fault platform for tapered roller bearings according to claim 5, characterized in that: The inner ring fixing device is fixed to the rotating shaft by bolts.

7. The online fault platform for tapered roller bearings according to claim 5, characterized in that: By controlling the voltage, the axial expansion and contraction of the piezoelectric ceramic can be achieved, thereby applying different preload forces to the inner ring.

8. The online fault platform for tapered roller bearings according to claim 6, characterized in that: The rotating shaft is equipped with threaded holes at different distances, and the threaded holes are fixed to the bolt device; the span between the two tapered roller bearings on the left and right sides is adjusted according to the different distances of the threaded holes to achieve experiments with different spans.

9. The online fault platform for tapered roller bearings according to claim 1, characterized in that: The inner ring fixing device has multiple threaded array holes along the circumference. By placing mass blocks of different weights in the threaded array holes, dynamic balance experiments can be achieved.

10. The online fault platform for tapered roller bearings according to claim 1, characterized in that: The bolts are used for fixing in a symmetrical manner.

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