Traction motor bearing sealing structure
A technology for bearing sealing and traction motors, which is applied in the direction of structural connections, casings/covers/supports, electrical components, etc., can solve the problems of easy loss of grease, easy entry of pollutants into the bearing, and pollution of grease, etc., to prevent Effects of contamination or runoff
Active Publication Date: 2018-03-23
CRRC YONGJI ELECTRIC CO LTD
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Problems solved by technology
[0004] The invention solves the problem that pollutants in the current existing bearing sealing structure easily enter the bearing, contaminate the lubricating grease, and easily lose the internal lubricating grease, and provides a traction motor bearing sealing structure
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[0010] The bearing sealing structure of the traction motor includes a rotating shaft 1, the end of which is stepped, and the rotating shaft 1 is sequentially covered with a rotor pressure plate 2, an end cover 3, a bearing seat 4, and a bearing 5 along the axial direction of the rotating shaft 1 from inside to outside . The speed measuring toothed disc 6, the outer edge of the speed measuring toothed disc 6 is covered with the bearing pressure plate 7 supported on the end face of the outer ring of the bearing 5 and the end face of the bearing seat 4, and the end face of the speed measuring toothed disc 6 facing the outer side of the rotating shaft 1 There is a tapered disc surface extending outwards both axially and radially along the rotating shaft 1. The end cover 3 is fixed with a sensor mounting seat 8 and a speed measuring toothed disc cover 9; the connecting surface of the rotor pressure plate 2 and the end cover 3 There is a tooth-shaped annular seal groove with a rectan...
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The invention relates to a bearing sealing structure, in particular relates to a traction motor bearing sealing structure, and solves the problems of the existing bearing sealing structure as follows:pollutants easily enter a bearing; lubricating grease is polluted; and the internal lubricating grease is easily lost. The scheme is as follows: an annular sealing groove is arranged on a connectionsurface between a rotor pressure plate and an end cover, so that fifth labyrinth seal is formed; annular grooves are arranged on the inner edge of the end cover, so that fourth labyrinth seal is formed with a rotating shaft; an annular stop edge is arranged on the inner circle surface of a bearing base, so that third labyrinth seal is formed with the rotating shaft; toothed annular sealing groovesare arranged on the contact surface between a bearing pressure plate and a speed measurement gear disk, so that second labyrinth seal is formed; and an annular stop ring is arranged in a sensor installation base, so that first labyrinth seal is formed with a conical disk surface. The traction motor bearing sealing structure disclosed by the invention has the advantages that: due to labyrinth sealat double sides, the lubricating grease can be effectively prevented from being polluted or lost; blocking of an external pollution source is carried out, so that pollution is prevented; and the annular stop ring can prevent the lubricating grease from polluting a sensor probe, and guide the lubricating grease to flow back.
Description
technical field [0001] The invention relates to a bearing sealing structure, in particular to a traction motor bearing sealing structure. Background technique [0002] As an important part of the traction motor, the bearing is responsible for supporting the rotation of the rotor. According to the statistical analysis of the failure rate of the traction motors of existing locomotives and bullet trains in my country, the failure rate of the bearings accounts for the largest proportion and has become the biggest hidden danger of the failure of the traction motor. The working environment of traction motor bearings is very harsh. It not only bears the radial force and axial force brought by the outside when the traction motor is working, but also bears the vibration and high temperature caused by the high-speed rotation of the traction motor. Therefore, the selection, lubrication and sealing of traction motor bearings determine the service life of the bearings. At present, the e...
Claims
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IPC IPC(8): H02K5/16H02K5/10H02K11/21
CPCH02K5/10H02K5/16H02K11/21
Inventor 连鑫黄超李彩红钟幼康
Owner CRRC YONGJI ELECTRIC CO LTD