Novel shaft end sealing device

Abstract

The invention discloses a novel shaft end sealing device. A bearing is mounted on a transmission shaft; a bearing inner ring is fixedly arranged close to a sleeve; a bearing outer ring is fixedly arranged close to a bearing end cover; an impeller I, an impeller II and an impeller III are sequentially mounted on the transmission shaft, fixing in the axial direction is achieved through an elastic retainer ring, and connection in the peripheral direction is achieved through a flat key, so that the three impellers synchronously rotate along with the transmission shaft; a pressure area with high pressure in middle and low pressure at the two sides is formed inside the bearing end cover, so that the problem that lubricating oil leakage is caused as internal pressure intensity of a speed reduceris greater than external pressure intensity of the speed reducer as a result of action of piston wind while the multiple unit train in high-speed operation passes through a tunnel is solved; eight tapered impeller baffle blocks are uniformly distributed and welded inside impeller rings, so that narrow seams with large and small ends are formed, and the narrow seams with large ends are mounted at abearing end; the impeller III and the impeller I are the same in structure, and are mounted in the same direction; and eight narrow seams are uniformly formed in the impeller II. The structure dimension value range of the impellers is given. The novel shaft end sealing device solves the speed reducer oil leakage problem while the multiple unit train passes through the tunnel, and has the advantages of being simple in structure, small in size, high in reliability, and the like.

Description

technical field [0001] The technology of the invention mainly relates to a shaft end sealing structure, which is especially suitable for train speed reducers of EMUs, and belongs to the technical field of mechanical equipment sealing. Background technique [0002] In recent years, with the rapid development of my country's rail transit industry, EMU trains "Harmony" and "Fuxing" are a very representative business card in China. In response to faster running speed and more complex and changeable The terrain also puts forward higher requirements for the reducer in the power part of the EMU train. [0003] We have designed a new type of shaft end sealing device, which combines the impeller group and the labyrinth seal. Through the structure of the impeller group and the synchronous rotation of the transmission shaft, different pressure areas with high pressure in the middle and low pressure on both sides are formed inside the bearing end cover to solve the problem caused by high...

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Problems solved by technology

[0003] We have designed a new type of shaft end sealing device, which combines the impeller group and the labyrinth seal. Through the structure of the impeller group and the synchronous rotation of the transmission shaft, different pressure areas with high pressure in the middle and low pressure on both sides are formed inside the bearing end cover to solve the problem caused by high speed. Lubricating oil leakage caused by the internal pressure of the reducer being higher than the external pressure due to the action of the piston wind when the running EMU train passes through the tunnel

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