Airproof equipment for power driven gear case of high speed train

Abstract

A sealing unit for the driven gear box of high-speed locomotive, where the lubricating oil is used, has a non-contact labyrinth seal mechanism, which features that a return oil buffering cavity is arranged in the return oil channel communicated with the internal cavity of box, the outlet of final return oil orifice is lower than the level of lubricating oil in the oil pool, and said return oil buffering cavity is communicated with said oil pool via said final return oil orifice. Its advantages are reasonable structure and high saeling effect.

Description

technical field [0001] The invention relates to a sealing device which is especially suitable for a gear box driven by a high-speed train power car lubricated by lubricating oil, and belongs to the technology of railway machinery. Background technique [0002] At present, for the lubrication of train drive gearboxes in my country, ordinary locomotives use grease, and quasi-high-speed locomotives use lubricating oil. However, whether it is grease or oil lubrication, there is a large amount of oil leakage, which seriously affects the service life of traction gears and transmission reliability. Safety and driving safety, and cause environmental pollution along the railway, at the same time, the leaked lubricating oil splashed on the track surface, also affects the performance of locomotive adhesion. [0003] my country's high-speed trains are currently being developed, tested and will soon enter the stage of commercial operation. However, during the development and testing proc...

AI Technical Summary

Problems solved by technology

When this kind of non-spur gear rotates at high speed, it will produce a blowing effect on its side, so it is not only difficult to use the Bernoulli effect to stably form the above-mentioned negative pressure zone in a certain area between the gear and the box, but also It is also possible to form a positive pressure at the outlet of the final oil return hole and cause the lubricating oil to flow backward, causing a large amount of oil leakage from the gearbox

That is to say, the existing technology is not only inapplicable for the sealing of the high-speed train power car drive gearbox that adopts non-spur gear transmissions such as herringbone gears, but also may make the final oil return hole become the oil inlet hole and produce Oil and gas backflow, resulting in a large amount of oil leakage from the gearbox

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