1. A self-balancing thrust sliding bearing is characterized in that: comprises a plurality of thrust bearing bushes and a supporting seat; the supporting seat comprises an upper seat and a bottom plate, the upper seat is arranged on the bottom plate, the upper seat is provided with a plurality of cylindrical through holes, and the plurality of through holes are positioned on the same circumference and are uniformly distributed on the circumference; a thrust bearing bush is arranged in each through hole; the bottom plate is provided with an oil groove and an oil inlet hole, each cylindrical through hole on the upper seat is respectively communicated with the oil groove, and the oil inlet hole is communicated with the oil groove; the bottom of the thrust bearing bush is provided with a cylindrical mounting part, the mounting part is inserted into the through hole of the upper seat, a sealing ring is arranged between the mounting part and the through hole, and a cavity gap enclosed by the oil groove, the through hole, the plurality of thrust bearing bush mounting parts and the sealing ring is filled with hydraulic oil.

2. The self-balancing thrust sliding bearing according to claim 1, wherein: and a pressure testing device is arranged at the bottom or on the side wall of the oil groove.

3. The self-balancing thrust sliding bearing according to claim 1, wherein: the oil groove on the base is annular or polygonal.

Background

For the thrust bearing, in order to improve the bearing capacity and reduce the temperature of the bearing bush, various load-balancing structures are generally adopted to balance the load of each thrust bearing bush. The current commonly used load balancing structure comprises: spring structures, bridge balancing mechanisms, etc. The spring structure can realize the uniform load among all bearing bushes, the structure is relatively simple, but the rigidity consistency of the spring per se has large influence on the uniform load of the bearing bushes, particularly on occasions with large load, the rigidity of the spring is not suitable to be designed to be too low, and the axial float is caused to be large if the rigidity of the spring is too low. The bridging balance mechanism has higher requirement on the processing precision of the balance mechanism, has a complex structure, is difficult to realize the uniform loading of the whole bearing, and has better uniform loading performance only on adjacent tiles.

Disclosure of Invention

In order to solve the technical problems, the invention provides a self-balancing thrust sliding bearing which is simple in structure, can realize uniform load of a thrust bearing, has a self-locking function and can prevent the occurrence of the condition of overlarge axial displacement under the working condition of overlarge load.

The technical scheme adopted by the invention is as follows: a self-balancing thrust sliding bearing is characterized in that: comprises a plurality of thrust bearing bushes and a supporting seat; the supporting seat comprises an upper seat and a bottom plate, the upper seat is arranged on the bottom plate, the upper seat is provided with a plurality of cylindrical through holes, and the plurality of through holes are positioned on the same circumference and are uniformly distributed on the circumference; a thrust bearing bush is arranged in each through hole; the bottom plate is provided with an oil groove and an oil inlet hole, each cylindrical through hole on the upper seat is respectively communicated with the oil groove, and the oil inlet hole is communicated with the oil groove; the bottom of the thrust bearing bush is provided with a cylindrical mounting part, the mounting part is inserted into the through hole of the upper seat, a sealing ring is arranged between the mounting part and the through hole, and a cavity gap enclosed by the oil groove, the through hole, the plurality of thrust bearing bush mounting parts and the sealing ring is filled with hydraulic oil.

In the self-balancing thrust sliding bearing, the bottom or the side wall of the oil groove is provided with a pressure testing device.

In the self-balancing thrust sliding bearing, the oil groove on the base is annular or polygonal.

Compared with the prior art, the invention has the beneficial effects that:

the self-balancing thrust bearing bush linkage device is simple in structure and low in cost, hydraulic oil is filled in a cavity formed by enclosing the oil groove, the through hole, the plurality of inference bearing bush mounting parts and the sealing ring, linkage of the thrust bearing bushes is achieved, namely, axial position change of one inference bearing bush can cause axial position change of other bearing bushes, load balancing among the thrust bearing bushes is achieved, and a self-balancing effect is good.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1-2, the present invention comprises a plurality of thrust bearing pads 1 and a support base 2; the supporting seat 2 comprises an upper seat 21 and a bottom plate 22, the upper seat 21 is installed on the bottom plate 22, a plurality of cylindrical through holes 211 are formed in the upper seat 21, the plurality of through holes 211 are located on the same circumference, and the through holes are evenly distributed on the circumference. Each through hole 211 is provided with a thrust bearing bush 1. The bottom plate 22 is provided with an annular oil groove 221 (the shape of the oil groove 221 can also be polygonal) and an oil inlet, each cylindrical through hole 211 on the upper seat is communicated with the oil groove 221 (when the oil groove 221 is polygonal, each cylindrical through hole 211 is positioned at the vertex or the edge of the polygonal oil groove), the bottom of the oil groove 221 is provided with a pressure testing device 222 (a strain sensor is adopted, a strain gauge is installed in the oil groove, a signal wire is led out and then connected to a proper display device, and the strain gauge can also be installed on the side wall of the oil groove 221) for testing the oil pressure in the oil groove 221, if the pressure of the oil pressure is obviously increased, the load borne by the bearing is increased, if the pressure is low, the bearing is proved to have sealing failure, and after the sealing failure of the bearing, the bearing is changed into a rigid supporting bearing through an axial limiting mechanism. The oil inlet hole is communicated with the oil groove 22 and is used for feeding oil into the oil groove 22. The bottom of the thrust bearing bush 1 is provided with a cylindrical mounting part 11, the mounting part 11 is inserted into a through hole 211 of the upper seat, a sealing ring 3 is arranged between the mounting part 11 and the through hole 211, and a cavity gap enclosed by the oil groove 221, the through hole 211, the mounting parts 11 of the thrust bearing bushes 1 and the sealing ring 3 is filled with hydraulic oil.

According to the invention, a cavity gap enclosed by the oil groove 221, the through hole 211, the mounting parts 11 of the plurality of thrust bearing bushes 1 and the sealing ring 3 is filled with hydraulic oil, a pressure detection device is adopted to monitor the pressure of the oil groove 221, when a certain thrust bearing bush 1 is pressed downwards under the action of load due to large load, other thrust bearing bushes 1 move outwards due to incompressible lubricating oil, and thus the load of other thrust bearing bushes 1 is increased, and finally, the automatic balance is realized until all the bush blocks are uniformly loaded.