Gear case sealing structure of urban rail vehicle

Abstract

The invention discloses a gear case sealing structure of an urban rail vehicle, comprising a bearing pedestal fixed to a case body and a sealing ring fixed on a rotation shaft, the bearing pedestal includes a matching hole for installing an outer ring of the bearing, and further includes a first sealing flange of the bearing pedestal, a second sealing flange of the bearing pedestal, a third sealing flange of the bearing pedestal and a fourth sealing flange of the bearing pedestal, the sealing ring includes a first flange of the sealing ring and a second flange of the sealing ring, a third flange of the sealing ring, a lubricating flange and a second sealing groove; the bearing pedestal and the sealing ring form a first radial clearance seal, a second radial clearance seal and a labyrinth seal; a first ring-shaped sealing chamber and a second ring-shaped sealing chamber are further formed between the bearing pedestal and the sealing ring, the bottom of the first ring-shaped sealing chamber is provided with an oil return hole, and the bottom of the second ring-shaped sealing chamber is provided with a through hole. The invention is simple in structure, reliable in sealing, and convenient in detaching and maintaining.

Description

technical field [0001] The invention relates to an oil-lubricated sealing structure for a rotating through part of a gear box, especially suitable for sealing the rotating through part of an axle of a transmission gear box of a rail vehicle, and belongs to the field of rail transit machinery. Background technique [0002] At present, due to the reliability, maintainability and economic cost of the gearbox, the transmission gearboxes of urban rail vehicles in my country are all lubricated with oil. During the use of some subway vehicle transmission gearboxes, there are varying degrees of lubricating oil leakage in the dynamic sealing parts, and the sealing structure is complex and the axial size is large; the leakage of lubricating oil not only affects the gears and bearings in the gearbox service life, and will cause environmental pollution along the track, and even affect the adhesion performance of the running part of the vehicle. [0003] With the rapid development of my...

AI Technical Summary

Problems solved by technology

[0004] The overhaul requirements for gearboxes of urban rail vehicles are relatively high, and the overhaul cycle is usually required to be 10-12 years or 1.2 million-1.5 million kilometers. However, the current contact sealing structure such as skeleton oil seals obviously cannot meet the service life requirements of gearbox seals. , and because the material is worn, it is very inconvenient to repair and replace the gearbox installed on the bogie. Therefore, the seal of the rotating part of the gearbox needs to adopt a non-contact sealing structure without wear

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