Metal tile water lubricating friction pair structure

Abstract

The invention relates to a metal tile water lubricating friction pair structure. A whole circle embedded thrust face is adopted for a thrust disc, and the thrust disc is made from graphite or silicon carbide or ceramic or a carbon fiber reinforced composite. A thrust tile is a metal tile, and the thrust tile is made of double-phase high-chromium alloy or is obtained by carrying out hardened layer treatment on the surface of a common steel material. The surface hardness of the thrust tile is HRC45-65, and the surface hardness of the thrust disc is HS50-85. The thrust face of the thrust disc is convenient to demount and maintain, the thrust tile is provided with a full-metal heat-insulation-free nonmetal tile face, the tile face is free of harmful concave deformation in a thermal transient state, and high temperature, high pressure and irradiation are resisted. The friction pair structure can be widely applied to the fields of three-generation nuclear power plants, small floating heaps and ship and warship nuclear power.

Description

technical field [0001] The invention relates to a water-lubricated friction pair structure of a metal tile. Background technique [0002] With the increasing safety standards of nuclear power plants, the low leakage rate of the primary circuit of the reactor has become the mainstream technical solution. The main pump of the traditional pressurized water reactor uses a shaft-sealed main pump. The shaft seal has hidden dangers of radiation leakage. The new third-generation pressurized water Type nuclear main pump or wet winding nuclear main pump, both nuclear main pumps use water lubricated bearings, and the water thrust of the impeller is mainly borne by water lubricated thrust bearings. Water-lubricated friction pairs are required to be resistant to high temperature, radiation, and impact. Traditional water-lubricated friction pairs generally use metal materials for the thrust plate and non-metallic materials for the thrust pads. [0003] Generally, the area of ​​the thrust...

AI Technical Summary

Problems solved by technology

Thrust tiles are generally made of graphite materials, which will have concave deformation during thermal transients, making it difficult to establish a water film of normal thickness, resulting in excessive wear and even irreversible damage to the friction pair

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