▎ 摘　　要

NOVELTY - The utility model belongs to the technical field of lubricating bearing, specifically claims a grease lubricating bearing structure of centrifugal pump, comprising an outer shaft sleeve and an inner shaft sleeve clamped and fixed in the outer shaft sleeve; the inner wall and the outer wall of the outer shaft sleeve are respectively coated with inner coating and outer coating of Teflon material; the coating formed by Teflon coating has good non-stick performance, high temperature resistance, low temperature resistance, corrosion resistance; low friction wear resistance and moisture resistance; it can enhance the mechanical performance and use stability of the outer shaft sleeve, reduce the wear loss caused by abrasion, extend the service life of the outer shaft sleeve to a certain extent; the inner wall of the inner shaft sleeve is coated with an auxiliary coating of graphene material; the graphene has high heat-conducting heat dissipation characteristics and corrosion resistance; reinforcing the connection stability between the bearing and the external workpiece, avoiding the high temperature caused by friction when the bearing rotates at high speed, resulting in abnormal wear condition of the bearing in the high temperature rotating state.