Self-reflux sealing structure of railway vehicle gearbox

Abstract

The invention discloses a self-backflow type sealing structure of a railway vehicle gear box. The self-backflow type sealing structure comprises a sealing cap, an oil baffle plate and a sealing ring. The sealing cap is provided with a first sealing cap flange, a second sealing cap flange, a third sealing cap flange, a fourth sealing cap flange, a sealing cap oil return notch, a first sealing groove and a third sealing groove. The sealing ring is provided with a first sealing ring flange, a second sealing ring flange, a third sealing ring flange, a fourth sealing ring flange, a fifth sealing ring flange, a second sealing groove and a fourth sealing groove. A first sealing clearance is formed between the sealing ring and the oil baffle plate, and a second sealing clearance is formed between the sealing ring and the sealing cap. A third sealing clearance, a fourth sealing clearance, a fifth sealing clearance, a sixth sealing clearance and a seventh sealing clearance are formed between the sealing cap and the sealing ring. The second, third and fourth sealing cap flanges and the third, fourth and fifth sealing ring flanges are arranged sequentially along the radial direction. The self-backflow type sealing structure is reliable in sealing and compact in structure.

Description

Technical field [0001] The invention relates to a sealing structure of the rotating through part of a gearbox that adopts oil lubrication, and is particularly suitable for a self-returning labyrinth seal structure of the rotating through part of a transmission gearbox of medium and high-speed rail vehicles, and belongs to the field of rail transit equipment. Background technique [0002] At present, most of the gearboxes of rail vehicles in our country use oil lubrication. If lubricating oil leaks in the gearbox during use, it will not only affect the service life of important parts such as gears and bearings in the gearbox, but also cause environmental pollution along the track, and even affect the adhesion performance of the vehicle running part. [0003] In the Chinese patent publication number: CN102009663A, the patent document titled "Urban Rail Vehicle Gearbox Sealing Structure" introduces a sealing structure for urban rail vehicle gearboxes. In the Chinese patent publicatio...

AI Technical Summary

Problems solved by technology

In the above two technical solutions, only four sealing gaps are set, so they are only suitable for urban rail, subway and other occasions where the running speed is not high

As the operating speed of the gearbox increases, the internal pressure of the gearbox also increases relatively, and the reliability of the seal cannot meet the requirements of the gearbox.

In addition, the mazes of the above two technical schemes are arranged in the axial direction, which requires a large axial space, which is not conducive to the lightweight and compact design of the gearbox

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