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Seal

A technology of seals and rotating parts, applied in the direction of engine seals, engine components, mechanical equipment, etc., can solve the problems of high energy consumption, large energy loss, increased friction, etc., to achieve excellent dynamic and static sealing performance, miniaturization The effect of friction

Inactive Publication Date: 2010-11-03
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, higher preload increases friction, which leads to higher energy consumption and greater energy loss

Method used

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Experimental program
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Embodiment Construction

[0030] Examples of seals according to the invention are shown in Figure 1amiddle. The seal 1 comprises a sleeve-like portion 3 adapted to fit around a rotatable part such as a shaft 4 . The sleeve-like part 3 is connected to the outer housing 5 of the seal by means of a resilient part 7 . The outer housing 5 is adapted to fit eg in a bore of the housing and may (as shown) consist of a metal flange with a rubber outer diameter. Other variations are also possible, such as an entirely rubber or an entirely metal housing. The outer housing 5 is statically sealed against a housing bore (not shown) and the sleeve-like portion 3 provides a dynamic seal during rotation of the shaft 4 . Such a seal may be used to seal the gap between the rotatable and non-rotatable parts, thereby maintaining fluid on the fluid side 6 of the seal relative to the air side 9 of the seal.

[0031] According to the invention, a low-friction dynamic seal is obtained because the sleeve-like portion 3 is ...

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PUM

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Abstract

A seal to seal a gap between a rotatable component (4, 18) and a non-rotatable component comprises: A fastening section adapted to be fixedly mounted in relation to the non-rotatable component, a sleeve-like section (3) adapted to be mounted around the rotatable component (4, 18), a resilient section (7) between the sleeve-like and fastening section comprising an arcuate portion (8), and in an unmounted condition, the sleeve-like section (3) has an inner diameter, DSEAL, with a predefined magnitude relative to an outer diameter of the rotating component, DSHAFT,such that 0,9 = DSEAL / DSHAFT = 1,1.

Description

technical field [0001] The invention relates to seals for sealing gaps between relatively rotatable parts. Background technique [0002] Sealing assemblies are widely used to seal the gap between relatively rotatable parts, for example, the gap between the rotating shaft of the motor and the housing hole. Seals are used to keep lubricant inside the motor and keep contaminants out. These aspects are important for the proper functioning of the motor and the prevention of early failures. A typical seal includes an outer housing to which a seal member is joined. Elastomeric materials, such as nitrile rubber, can be used for the sealing element. The outer housing is statically sealed against the housing bore. The sealing element seals against a mating end face such as a shaft and provides a dynamic seal in a rotational situation and a static seal in a static situation. [0003] Seals designed to hold oil or low viscosity fluids are generally spring loaded to ensure static an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16F16J15/32
CPCF16J15/3224
Inventor 于尔根·库尔思克利福德·R·沃斯利
Owner AB SKF