PLAIN BEARING Russian patent published in 1999 - IPC

FIELD: mechanical engineering. SUBSTANCE: plain bearing has friction pair consisting of external bush positioned in body and internal bush arranged on shaft and having longitudinal section shaped as trapezium. In this case tapered ends of internal bush interact with conjugated tapered surfaces of compressing parts. One compressing part is pressed to one of ends of internal bush by means of nut. External bush is press-fitted into body. Part compressing internal bush is made elastic, and larger base of the trapezium of internal bush faces shaft. External and internal bushes are manufactured of hard wear-resistant antifriction material with low tensile strength and high compression strength, for example, siliconized graphite. Internal bush consists of two parts between which intermediate ring is mounted. The ring is made from material of high tensile strength, for example, steel, with radial holes for lubricating liquid supply and with flats for hydraulic wedge creation. Parts compressing internal bush at ends have slope angles of ends to shaft axis smaller than corresponding slope angles of internal bush ends. Space is provided between internal bush and shaft which is filled with polymerized material. Internal bush ends and ends of compressing parts joined with bush are also coated with that material. Compressing parts are secured on shaft. One end of external bush rests on bead of body, while the other, on mating ring press-fitted into race. EFFECT: prolonged service life of bearing. 5 cl, 1 dwg