A high-temperature resistant self-lubricating spherical plain bearing, its preparation method and application

By constructing a multi-layer high-temperature resistant self-lubricating coating on the inner and outer rings of the spherical plain bearing, the wear resistance and lubrication problems of the spherical plain bearing under high-temperature conditions are solved, meeting the service requirements above 700℃ and suitable for high-end equipment.

CN122280951APending Publication Date: 2026-06-26SHANGHAI JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI JIAOTONG UNIV
Filing Date
2026-04-30
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies cannot meet the lubrication service requirements above 700°C. Traditional spherical plain bearing coatings cannot effectively achieve high temperature resistance, wear resistance and self-lubrication functions in high temperature environments.

Method used

A high-temperature resistant, self-lubricating cermet coating, including multi-layered NiCrAlY and NiCr-Cr3C2-hBN, is constructed on the outer spherical surface of the inner ring of the spherical bearing. A nickel-based nanocrystalline coating is constructed on the inner spherical surface of the outer ring. Plasma thermal spraying and magnetron sputtering technologies are used to form a multi-layered alternating structure NiCrMoNb+LaF3/NiCrAlYHf coating.

Benefits of technology

It achieves high temperature resistance, wear resistance and self-lubrication in environments above 700℃, meeting the extreme working conditions of high-end equipment.

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Abstract

This invention relates to the field of spherical plain bearing technology, and more particularly to a high-temperature resistant self-lubricating spherical plain bearing, its preparation method, and its application. This invention provides a high-temperature resistant self-lubricating spherical plain bearing. The invention constructs a high-temperature resistant self-lubricating cermet coating 4 on the outer spherical surface of the inner ring 5 of the high-temperature resistant self-lubricating spherical plain bearing, giving it high-temperature resistance, wear resistance, and self-lubricating functions. The invention also constructs a nickel-based nanocrystalline high-temperature resistant self-lubricating coating 2 on the inner spherical surface of the outer ring 1 of the high-temperature resistant self-lubricating spherical plain bearing to achieve high-temperature wear resistance and self-lubrication on the inner spherical surface of the outer ring 1. Through the construction and combination of the above coatings, this invention achieves high-temperature resistant self-lubricating function for the relatively moving surfaces of the inner and outer rings.
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