CN104792531A - Multistage thrust ball bearing-pack uniform loading performance test rack - Google Patents

Abstract

The invention relates to a load sharing performance test bench of a multistage thrust ball bearing group. It consists of a static condition simulation system and a loading system. The static working condition simulation system is composed of a main shaft, a compression sleeve, an upper end plate and a middle end plate. The middle end plate and the upper end plate are supported and connected by four support rods arranged at 90 degrees. The two ends of the support rod are processed with threads, and the axial relative positions of the two end plates are fixed and adjustable with nuts to ensure the center of the two end plates. located on the same axis. The multistage ball bearing group is installed on the main shaft, and the multistage ball bearing group is fixed between the middle end plate and the upper end plate through adjusting nuts. By arranging resistance strain gauges on the outer races of the bearings at all levels in the bearing group, the bearing capacity of the bearings at all levels after the bearing group is loaded can be measured, and then the load sharing of the bearing group can be obtained. The bench can realize continuously variable loading and can adapt to different series of bearings.

Description

A Test Bench for Load Sharing Performance of Multistage Thrust Ball Bearing Sets

technical field

The invention relates to a load sharing performance test bench of a multistage thrust ball bearing group, which belongs to indoor experimental equipment for petroleum drilling.

Background technique

The multi-stage thrust ball bearing set is a special bearing that can bear both radial load and axial load, and is widely used in aero-engines, ship propellers, water turbines, and downhole power drilling tools. It has been proved by experiments that its load sharing performance has a great influence on its working life. Only when the load distribution of each pair of bearings in the bearing group is uniform or tends to be uniform, its service life can reach the longest, and the actual bearing group is processed. After it was manufactured, its load-sharing performance was not known. According to the academic papers and patents published abroad, there is no experimental device for testing the load sharing performance of the multi-stage thrust ball bearing group. The invention aims at testing the load sharing performance of the multistage thrust ball bearing group, so as to clarify the load sharing situation of the multistage thrust ball bearing group during work, and further improve the service life of the bearing group.

Contents of the invention

The purpose of the present invention is to test the load-sharing performance of multi-stage thrust ball bearings, and provide a test bench for testing the load-sharing performance of multi-stage thrust ball bearings, which is used to test the load-sharing performance of multi-stage thrust ball bearings, thereby improving the The actual service life of the bearing set.

The technical scheme adopted in the present invention is: a multi-stage thrust ball bearing group load sharing performance test bench of the present invention, which is composed of a static working condition simulation system and a loading system. The static working condition simulation system is composed of a main shaft, a compression sleeve, an upper end plate and a middle end plate. The middle end plate and the upper end plate are supported and connected by four support rods arranged at 90 degrees. The two ends of the support rod are processed with threads, and the axial relative positions of the two end plates are fixed and adjustable with nuts to ensure the center of the two end plates. located on the same axis. The multi-stage ball bearing set is installed on the main shaft, and the main shaft is located between the middle end plate and the upper end plate, and the compression sleeve is pressed by the adjusting nut to fix the multi-stage ball bearing set between the middle end plate and the upper end plate .

The loading system is composed of a support sleeve, a jack and a support end plate. Four support rods distributed at 90 degrees are also used to support and connect the middle end plate and the support end plate; threads are processed at both ends of the support rod; Nuts connect and fix it and can be adjusted to ensure that the center of circle of the middle end plate and the support end plate are located on the same axis line. The jack is installed between the middle end plate and the support end plate, and is located on the same axis. The jack supports the main shaft through the support sleeve.

The upper end plate and the support end plate are also supported and connected by four support rods arranged at 90 degrees. The two ends of the support rod are threaded, and the support end plate is connected by double-headed studs, and the upper end plate is connected by nuts. Fixed (can be adjusted). Thereby the whole bench becomes a whole, and the stress is even.

The present invention has the following features and advantages: 1. The bench can realize continuously variable loading; 2. The bench can adapt to bearings of different stages; 3. The bench can scientifically measure the load-sharing condition of multi-stage bearings after being loaded.

Description of drawings

Fig. 1 is a kind of multi-stage thrust ball bearing set load sharing performance test bench structure schematic diagram of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1 .

In the figure: 1. Main shaft 2. Compression sleeve 3. Upper end plate 4. Middle end plate 5. Support sleeve 6. Jack 7. Support end plate 8. Multi-stage ball bearing 9. Support rod 10. Nut 11. Nut.

Detailed ways

Embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1 and Fig. 2, a multi-stage thrust ball bearing group load sharing performance test bench of the present invention is composed of a static working condition simulation system and a loading system. With the middle end plate 4 as the boundary, it can be divided into a static working condition simulation system and a loading system. The static working condition simulation system is composed of a main shaft 1, a compression sleeve 2, an upper end plate 3 and an intermediate end plate 4, and the intermediate end plate 4 and the upper end plate 3 are supported and connected by four support rods 9 arranged at 90 degrees. , the two ends of the support rod 9 are threaded, and the axial relative positions of the two ends of the plates are fixed and adjustable with nuts 10, so as to ensure that the centers of the two ends of the plates are located on the same axis.

The loading system is composed of a support sleeve 5, a jack 6 and a support end plate 7. The jack 6 is located between the middle end plate 4 and the support end plate 7 , and the jack 6 supports the main shaft 1 through the support sleeve 5 .

As shown in FIG. 1 , the multistage ball bearing 8 and the compression sleeve 2 are installed on the main shaft 1 . The inner ring at the bottom of the bearing just sits on the shoulder of the main shaft 1, while the outer ring sits on the middle end plate 4. By adjusting the nuts 10 on each support rod 9, the upper end plate 3 is located on the outer ring at the upper end of the bearing. , while the compression sleeve 2 is located above the inner ring of the bearing. Then the compression sleeve 2 is tightly fixed on the bearing inner ring by adjusting the nut 11 on the main shaft.

By adjusting the jack 6, loads of different sizes can act on the support sleeve 5, and the load is transmitted to the main shaft 1 through the support sleeve 5, and then the load is applied to the inner ring of the bearing to realize the simulated working state of the thrust ball bearing. The resistance strain gauges are arranged on the outer races of the bearings at all levels of the bearing group. After loading, the loading conditions of the bearings at all levels in the bearing group can be measured, so that the load sharing of the bearing group can be known. By adjusting the position of the nut 11 on the upper end plate 3 and the main shaft 1, the number of stages of the bearings in the bearing group can be increased or decreased, so that the number of stages of the bearings can be changed.

Claims (2)

1. A multi-stage thrust ball bearing group load equalization performance test bench is composed of a static working condition simulation system and a loading system, characterized in that: the static working condition simulation system consists of a main shaft (1), a compression sleeve (2), consisting of an upper end plate (3) and a middle end plate (4); the middle end plate (4) and the upper end plate (3) are supported and connected by four support rods (9) arranged at 90 degrees, and the support rods (9) Threads are processed at both ends; the axial relative positions of the two end plates are fixed and adjustable with nuts (10), so as to ensure that the centers of the two end plates are located on the same axis line; the loading system is supported by cover (5), jack (6), and support end plate (7); the jack (6) is located between the middle end plate (4) and the support end plate (7), and the jack (6) is supported by the support sleeve (5) Lift the spindle (1). 2. The load-sharing performance test bench of a multi-stage thrust ball bearing group according to claim 1, characterized in that: by adjusting the jack (6), loads of different sizes can be made to act on the support sleeve (5), And the load is transmitted to the main shaft (1) through the support sleeve (5), and then the load is applied to the inner ring of the bearing to realize the simulation of the working state of the multi-stage thrust ball bearing; adjust the nut on the upper end plate (3) and the main shaft (1) (11) position, the number of stages of bearings in the bearing group can be increased or decreased.