The lip provides dynamic sealing on the shaft, while the outside diameter deals with the static sealing at the bore. The type and the material of the seal varies according to the operating medium
and conditions.
Sealing elements are inexpensive when compared to the total cost of the equipment often depends on the quality of the seals.
The shaft seal consists of an elastomer ring bonded to a metallic ring, both of which are vulcanized together. The sealing is done by a lip on the elastomer ring that is pressed snugly around the shaft by a helically wound garter spring. When properly designed and installed, the lip rides on a film of lubricant about 0.0025 mm. thickness. If the film gets too thick, fluid leaks; if it is too thin, the lip gets hot, and the seal may fail.
The use of the sealing material is taken into consideration when lubricating oil is applied to the shaft to decrease the heat and wear caused by friction between two parts come into contact and one of these parts is rotating in a mechanism.
GENERAL INFORMATION
|
A shaft seal also called an oil seal, in machinery, a device that prevents the passage of fluids along a shaft. Seals are necessary when a shaft extends from a housing containing oil, such as a pump or gearbox. |
oil seals
Style: | Oil |
Standard or Nonstandard: | Standard |
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