High-speed driven gearbox device of railway vehicle

Abstract

The invention discloses a high-speed driven gearbox device of a railway vehicle. The gearbox device comprises a box body and a driving gear and a sealing mechanism which are arranged in the box body, wherein the driving gear is arranged in an inner cavity of the box body; an oil sump is arranged at the bottom of the inner cavity; the sealing mechanism forms a non-contact type mechanical labyrinthsealing structure, and particularly a buffer cavity and an oil return cavity are arranged in the box body; the buffer cavity is arranged between the oil return cavity and the oil sump so as to separate the oil return cavity from the oil sump in the inner cavity; an oil return channel comprising the oil return cavity and the buffer cavity is formed between the sealing mechanism and the oil sump; and a first oil return hole led from the sealing mechanism is communicated with the oil sump through the oil return cavity and the buffer cavity, thereby ensuring that the gearbox device disclosed by the invention has simple structure, favorable processing property and low manufacturing cost; and an oil return system can smoothly return oil and has strong sealing property.

Description

Technical field [0001] The invention relates to a driving gear box device, an important component of a railway vehicle drive system, in particular to a high-speed drive gear box device of a railway vehicle. Background technique [0002] The railway vehicle drive gearbox device is one of the key components of the railway vehicle drive system, including the case, transmission gear, sealing mechanism, oil return passage, bearing, breather (hole), lubricating oil, dipstick and magnetic plug, etc. It keeps the lubricating oil in the box from leaking, and the dirt outside the box cannot enter the box, and has the functions of ensuring sufficient and reliable lubrication of the high-speed drive system and smooth and effective oil return system. [0003] The quality of the sealing performance of the high-speed drive gearbox device, the smoothness of the oil return system, and whether the lubrication effect of the lubrication system is sufficient and reliable are the key and difficult point...

AI Technical Summary

Problems solved by technology

But its described technical scheme mainly has the following disadvantages: on the one hand, its described non-contact labyrinth sealing mechanism is composed of the first dynamic oil seal ring, the second dynamic oil seal ring, the first static oil seal ring, the second static oil seal ring and the third Composed of static oil seal rings to form radial small clearance fit and decompression chamber, the flow resistance of viscous fluid is used to achieve sealing, and the three static oil seal rings are all made of aluminum alloy, which are welded into one body after processing.

Practice has proved that this structure is difficult to avoid the blockage of terminal oil return. As is known, due to the gear teeth stirring oil, a positive pressure area is generated on the same side of the gear rotation, and a negative pressure area is generated in the opposite direction. Of course, this positive and negative pressure area Because various factors are not distributed regularly, but exist objectively

Therefore, the terminal oil return hole is set near the lowest point of the gear teeth and the vicinity, which objectively affects the smooth oil return, and the existence of the blast effect on the end face of the gear exacerbates the obstruction of oil return

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