Shaft end oil seal structure of gearbox

Abstract

The invention discloses a shaft end oil seal structure of a gearbox. The shaft end oil seal structure comprises oil seal assemblies, wherein the oil seal assemblies include a movable oil seal assemblyand a static oil seal assembly, the movable oil seal assembly and the static oil seal assembly are matched in an insertion mode, a wear resistant ring sleeves a rotary shaft, the movable oil seal assembly is installed on a transparent cover of the gearbox and is located on the outer side of the wear resistant ring, the movable oil seal assembly comprises a first movable oil seal and a second movable oil seal, the first movable oil seal is far from the shaft end of the rotary shaft and is close to a bearing of the gearbox, the second movable oil seal is close to the shaft end of the rotary shaft, an oil collecting groove and an oil return passage are further formed in the transparent cover of the gearbox, the oil collecting groove communicates with the oil return passage, and the first movable oil seal and the second movable oil seal respectively communicates with the oil collecting groove.

Description

technical field [0001] The invention relates to the technical field of oil seals, in particular to a shaft end oil seal structure of a gearbox. Background technique [0002] The gearbox is an important transmission component, and the lubrication system of the gearbox is of great significance to the normal operation of the gearbox. Insufficient lubrication accounts for more than half of the reasons for gearbox failure. At present, the gearbox is usually lubricated with professional gear oil, but it is often accompanied by the problem of gear oil leakage during use, such as figure 1 As shown, the oil seal system of the gearbox includes a static seal assembly and a dynamic seal assembly. Each static seal can achieve a reliable leakage sealing effect through a reasonable end surface flatness combined with a seal. For example, the static seal assembly at the shaft end usually uses an O-shaped rubber seal ring. The O-shaped rubber sealing ring has good sealing performance, long ...

AI Technical Summary

Problems solved by technology

At low speed, the axial and radial dimensions of the rotary lip seal ring are relatively compact, the processing is simple and the seal is tight, but it is difficult to form a stable hydrodynamic oil film between the lip of the seal ring and the shaft interface. If the oil film is too thick, the fluid will leak; if the oil film is too thin, the fluid lubricating film cannot be formed, and the lips will be worn due to dry friction. It will also lead to insufficient oil level, which will reduce the service life of gears and bearings, cause equipment failure, cause shutdown, stop production, and cause huge economic losses to the user.

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