Gear case ventilation structure and gear case

Abstract

The invention discloses a gear case ventilation structure and a gear case. The gear case ventilation structure comprises a ventilation cover plate and ventilators arranged on the ventilation cover plate; the ventilation cover plate comprises an upper-layer cover plate body and a lower-layer cover plate body, the lower-layer cover plate body is covered with the upper-layer cover plate body, and thearea, protruding out of the lower-layer cover plate body, of the upper-layer cover plate body is adopted as an installing skirt edge; and ventilation holes penetrating through the side faces of the lower-layer cover plate body are formed in the lower-layer cover plate body, and first installing holes are formed in the upper surface of the ventilation cover plate, communicate with the ventilationholes and are used for allowing the ventilators to be installed. According to the gear case ventilation structure, the honeycomb-shaped ventilation cover plate is formed through multiple ventilation holes, therefore, the distance from the interior of a gear case body to the outside is lengthened, oil mist can be coagulated in the honeycomb-shaped ventilation holes and then flows back into the gearcase, the condition that the oil mist escapes out of the gear case is reduced, and the functions of achieving ventilation but not allowing oil to pass are achieved on the mechanical structure.

Description

technical field [0001] The invention relates to the technical field of gear box ventilation structure, in particular to a gear box ventilation structure and a gear box. Background technique [0002] High-speed gearboxes, especially high-speed gearboxes for rail vehicles with a gear line speed of more than 40m / s, generally need to be equipped with a gearbox ventilation device to ensure the relative balance between the internal air pressure of the box and the external atmospheric pressure, so as to avoid excessive air pressure in the box. Large, resulting in oil leakage. The usual method is to directly drill the ventilation installation hole on the box body or the bearing seat, install the respirator, and the respirator is directly connected with the inside of the box body. During the high-speed operation of the gearbox, the interior of the gearbox is mostly a mixture of air and oil atomization. In order to ensure that the lubricating oil does not leak, the inside of the...

AI Technical Summary

Problems solved by technology

The disadvantage is that part of the oil mist will escape the gear box and condense around the respirator, which is easy to be contaminated with dust, and even more seriously, it will even block the breathing passage

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