Tapered roller bearing online fault platform

Abstract

The invention 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 that any position of the inner ring of the tapered roller bearing is not moved, 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 online fault prefabrication experiment of faults of the retainer and the tapered roller of the tapered roller bearing and 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] The invention belongs to the field of online monitoring of rotor system test benches, and in particular relates to an online fault platform for tapered roller bearings, which performs online fault detection on tapered roller bearings. Background Art

[0002] The current rotor system test bench generally conducts experiments with a single fault, and most importantly, the fault cannot be tested online. Many companies need an online monitoring system. If the bearing is moved, the position will change greatly, seriously affecting the accuracy and precision of the test. Adding faults to the bearing without moving it can not only ensure the timeliness of the fault, but also improve its accuracy without moving the position of the bearing. At the same time, it is necessary to add coupling faults to improve the practicality of the test bench. It is urgent to invent an online fault platform and method of use for tapered roller bearing-rotor system for monitoring. Summary of the invention

[0003] The present invention provides an online fault platform for tapered roller bearings, and the technical problem to be solved is: solving the problem that a rotor system test bench, especially a tapered roller bearing, cannot be monitored for faults online.

[0004] In order to solve the above technical problems, the present invention provides an online fault platform for tapered roller bearings, which is characterized by: comprising an outer ring clamping device, an inner ring fixing device, a laser device and a rotating shaft; the left and right tapered roller bearings are symmetrically installed 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, and 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 retainer, tapered roller and outer ring of the tapered roller bearing to realize prefabrication of single or multiple faults.

[0005] Beneficial effects: In the present invention, without moving any position of the inner ring of the bearing, the moving block moves to the outside on both sides along the Y direction, so that the outer ring of the bearing is in a free state, and the outer ring is grasped by a manipulator and moved along the axial direction to realize the online prefabrication fault experiment of the tapered roller bearing retainer and tapered roller faults. The motor fine-tunes the shaft to a specific position, and then the laser device uses multiple degrees of freedom to sinter certain positions of the retainer and tapered roller to realize the prefabrication of single or multiple faults. It can also sinter on the shaft to realize coupled faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A schematic diagram of the structure of the present invention

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

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

[0009] Figure 4 Schematic diagram of the overall structure of the present invention DETAILED DESCRIPTION

[0010] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below.

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

[0012] The left and right 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 interference fit, and the outer ring of the tapered roller bearing is fixed in the outer ring clamping device 2 to achieve X-direction, i.e. axial fixation of the outer ring. The rotating shaft is driven to rotate by a motor.

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

[0014] The telescopic device 24 can realize the upward and downward movement of the fixed block 22 by means of the extension and retraction of the hydraulic cylinder to match different bearing models.

[0015] Due to the structural properties, one end of the tapered roller bearing is fixed in the X direction of the outer ring, and the other end needs to be pressed against the inner ring by the end of the inner ring fixing device 3. The inner ring fixing device 3 is provided with a piezoelectric ceramic 31, a bolt device 32 and a threaded array small hole 33. The inner ring fixing device is fixed to the rotating shaft 8 by the bolt device 32. The piezoelectric ceramic 31 is arranged circumferentially at the end of the inner ring fixing device 3, and the top of the piezoelectric ceramic is in contact with the end face of the inner ring. The axial expansion and contraction of the piezoelectric ceramic is achieved by controlling the voltage, so that different preload forces are applied to the inner ring. Threaded holes 81 with different distances are set on the rotating shaft 8, and the threaded holes 81 are fixed with bolts to the bolt device 32. The bolt device 32 is fixed in a symmetrical manner 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. At the same time, the threaded array small holes 33 are placed in the small holes to achieve dynamic balance experiments by placing mass blocks (small bolts) of different weights. The fixing method of the inner ring of the left bearing is similar to that of the right bearing.

[0016] Without moving any position of the inner ring of the tapered roller bearing, take the left bearing as an example, move the moving blocks 21 and 23 to the outside on both sides along the Y direction, so that the outer ring of the bearing is in a free state, and use the manipulator 7 to grab the outer ring and move it along the axial X direction to achieve the unchanged position of the tapered roller bearing retainer and tapered roller, and realize the online prefabrication fault experiment. The motor fine-tunes the shaft to a specific position, and then the laser device 6 uses multiple degrees of freedom to sinter certain positions of the retainer, tapered roller and outer ring to realize the prefabrication of single or multiple faults. At the same time, it can also sinter the shaft 8 to realize prefabrication experiments such as shaft coupling fault defects.

[0017] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An online fault platform for tapered roller bearings, characterized by: It includes an outer ring clamping device, an inner ring fixing device, a laser device and a rotating shaft; the left and right tapered roller bearings are symmetrically installed on the rotating shaft; the inner ring of the tapered roller bearing is connected to the rotating shaft through an interference fit, the outer ring of the tapered roller bearing is fixed in the outer ring clamping device, and 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 retainer, tapered roller and outer ring of the tapered roller bearing to realize the prefabrication of single or multiple faults.

2. The tapered roller bearing online fault platform according to claim 1, characterized in that: The shaft is driven to rotate by the motor.

3. The tapered roller bearing online fault platform according to claim 1, characterized in that: The outer ring clamping device comprises 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 realize lateral movement, and are fixed as a whole by bolts.

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

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

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

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

8. The tapered roller bearing online fault platform according to claim 6, characterized in that: Threaded holes with different distances are arranged on the rotating shaft, and the threaded holes are fixed with bolts to the bolt device; the span between the left and right tapered roller bearings is adjusted according to the different distances of the threaded holes to realize experiments with different spans.

9. The tapered roller bearing online fault platform according to claim 1, characterized in that: The inner ring fixing device is provided with a plurality of thread array holes along the circumference, and a dynamic balancing experiment is realized by placing mass blocks of different weights in the thread array holes.

10. The tapered roller bearing online fault platform according to claim 1, characterized in that: Without 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 the outer ring of the tapered roller bearing is grasped by a manipulator and moved along the axial X direction, so that the positions of the tapered roller bearing retainer and the tapered roller remain unchanged, and an online prefabrication fault experiment is realized; the motor fine-tunes the shaft to a specific position, and then the laser device uses multiple degrees of freedom to sinter certain positions of the retainer, tapered roller and outer ring to realize prefabrication of single or multiple faults; at the same time, the shaft 8 can also be sintered to realize the prefabrication experiment of the shaft coupling fault defect.

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