Water-lubricated two-way working thrust bearing device

Abstract

The invention relates to a water-lubricated two-way working thrust bearing device, the main structure of which is composed of a bearing seat, a pre-tightening spring, a track ring plate, a lower balance block, a roller, an upper balance block, a thrust bearing shoe base, a thrust shoe, a positioning pin and The thrust head is composed of thrust bearings with upper and lower symmetrical structures. The thrust bearings press the thrust pads to the surface of the thrust head through the pre-tightening springs at both ends, and the motor bottom cover, bearing seat and sleeve are pressed axially by bolts. Installed in the bearing chamber of the motor frame. The thrust bearing adjusts the up and down movement of the thrust head through the gap between the bearing seat and the track ring plate. When the thrust head moves up and down, the pre-tightened spring pushes the track ring plate, rollers, balance weight, bearing pad and thrust The tiles complete the following movement together, forming a unique two-way working thrust bearing device.

Description

Technical field [0001] The invention is a water-lubricated two-way working thrust bearing device. Background technique [0002] A water-lubricated thrust bearing is a self-lubricating bearing that uses water as the medium. When the bearing is running, the rotating thrust head brings lubricant (water) into the thrust pad and the thrust head to produce a hydrodynamic lubricating water film. It is generally made of carbon, graphite or composite materials with self-lubricating function. In order to reduce the friction between the thrust head and the thrust pad, the roughness of the thrust head is required to be very high, and higher hardness is required to meet the needs of anti-wear. [0003] The third-generation large-scale advanced PWR nuclear power canned motor pump is one of the key core equipment in the primary loop system of the reactor. Since the canned motor pump is directly suspended upside down on the lower end of the steam generator without a separate support, the rotor o...

AI Technical Summary

Problems solved by technology

Since the rotor weighs more than ten tons, and the thrust generated by the impeller of the canned pump has reached more than ten tons, the combined thrust can reach more than thirty tons. The use of traditional one-way working thrust bearings will inevitably produce thrust reversing shocks. This kind of impact is likely to damage the parts of the thrust bearing, causing bearing failure

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