Railway vehicle traveling gearbox sealing structure

Abstract

The invention discloses a railway vehicle traveling gearbox sealing structure which comprises an end cover, a framework oil seal, a bearing pedestal, a sealing ring and a sealing sleeve, wherein a first sealing flange of the bearing pedestal is corresponding to a first flange of the sealing ring to form a first circumferential sealing gap; a second sealing flange of the bearing pedestal is corresponding to a second flange of the sealing ring to form a second circumferential sealing gap; a third sealing flange of the bearing pedestal is corresponding to a third flange of the sealing ring to form a third circumferential sealing gap; a fifth sealing flange of the bearing pedestal extends into a second maze sealing groove of the sealing ring; a fourth flange of the sealing ring extends into a first maze sealing groove of the bearing pedestal to form maze sealing; first, second and third sealing cavities are formed between the bearing pedestal and the sealing ring; oil return holes are arranged on the bearing pedestal and located at the bottoms of the sealing cavities; the framework oil seal is arranged between the end cover and the sealing sleeve; and contact type sealing is formed between the framework oil seal and the sealing sleeve. The railway vehicle traveling gearbox sealing structure is reliable in bidirectional sealing and simple in structure.

Description

technical field [0001] The invention relates to a sealing structure for a rotating through part of a gear box lubricated by oil, and is especially suitable for sealing the rotating through part of an axle of a transmission gear box for medium and high-speed rail vehicles. Background technique [0002] At present, most of my country's rail vehicle running gearboxes are lubricated with oil. If the lubricating oil leaks during the use of the running gearbox, 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 running part of the vehicle. At the same time, during the use of the gearbox, once foreign rain, snow, dust and other sundries enter the gearbox, it will have varying degrees of impact on the service life of the bearings, gears, etc. and the performance of the lubricating oil. Therefore, in the design of the gearbox Whe...

AI Technical Summary

Problems solved by technology

In this technical scheme, only one circumferential sealing gap is set, so it is only suitable for occasions where the running speed of urban rail, subway, etc. is not high

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

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