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Seals and rotating components

A technology of rotating components and seals, which is applied in the direction of engine seals, bearing components, engine components, etc., and can solve problems such as large friction torque and large wear

Active Publication Date: 2021-01-29
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the sealing effect of the above-mentioned prior art seal depends on the contact force between the sealing lip 30 and the shaft, for a better sealing effect, the contact force between the sealing lip 30 and the shaft in the sealing Usually designed to be larger
Therefore, this typical oil medium seal usually has a very large frictional moment and produces a very large amount of wear during operation

Method used

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  • Seals and rotating components
  • Seals and rotating components
  • Seals and rotating components

Examples

Experimental program
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Effect test

no. 1 approach

[0029] The seal according to the invention has an annular structure as a whole. Such as figure 2 As shown, the seal according to the first embodiment of the present invention includes a skeleton 1 , a rubber part 2 and a sealing lip 3 .

[0030] The skeleton 1 includes a skeleton axial portion 11 extending along the axial direction A and a skeleton radial portion 12 extending along the radial direction R. The skeleton axial portion 11 is used to be fixed to a housing (not shown) of the shaft assembly. And the rubber portion 2 is mainly attached to the skeleton radial portion 12 . The sealing lip 3 extends from the radially inner end of the frame radial portion 12 of the frame 1 to the shaft (not shown) in the shaft assembly, and the extended axial free end 3a of the sealing lip 3 and the shaft The interference fit is realized, so that when the shaft assembly is in a static state (the shaft and the housing do not rotate relative to each other), the axial free end of the seal...

no. 2 approach

[0040] Such as Figure 4 As shown, the structure of the sealing lip 3 according to the second embodiment of the invention differs from that of the sealing lip 3 according to the first embodiment of the invention in that in this embodiment, the sealing surface of the sealing lip 3 3a1 has two sets of pumping grooves 31 (first pumping groove 311 and second pumping groove 312 ) opposite to each other in inclined directions with respect to the axial direction A, and the pumping groove 32 on the sealing lip 3 is a semicircular groove.

[0041] In the above-mentioned first embodiment, since the relative rotation direction of the seal lip 3 with respect to the shaft is constant, it is sufficient to provide only one set of pumping grooves 31 . However, if the relative rotation direction of the sealing lip 3 with respect to the shaft can be changed, two sets of pumping grooves 31 should be provided as in this embodiment.

[0042] Such as Figure 5 As shown, preferably, in the case wh...

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PUM

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Abstract

The invention relates to the field of sealing, more particularly to a seal used for sealing between relatively rotatable components and a rotating component using the seal. The seal is used for the sealing of the relatively rotatable first assembly and the second assembly and is generally ring-shaped. The seal includes: a skeleton; and a sealing lip fixed to the skeleton, and the sealing lip has an axial free end, and the axial free end has a sealing surface. The sealing surface has a plurality of pumping grooves distributed along the circumferential direction, and the width of the pumping grooves becomes smaller in the axial direction closer to the axial end edge of the axial free end. In addition, the present invention also provides a rotating assembly including the above sealing element. Thus, the present invention provides a near zero leakage, zero friction non-contacting hydrodynamic seal and shaft assemblies and bearings employing such seals.

Description

technical field [0001] The invention relates to the field of sealing, more particularly to a seal used for sealing between relatively rotatable components and a rotating component using the seal. Background technique [0002] In the prior art, a typical seal used for oil medium sealing in a shaft assembly (including a relatively rotatable shaft and a housing) is a contact seal, which usually has an annular shape and is usually interference-fitted with the shaft. Such as figure 1 As shown, the seal includes a skeleton 10 , a rubber part 20 , a sealing lip 30 and a spring 40 . The skeleton 10 includes a skeleton axial portion 101 extending along an axial direction A and a skeleton radial portion 102 extending along a radial direction R, and the skeleton axial portion 101 is used for fixing with a housing (not shown) of a shaft assembly. And the rubber part 20 is attached to the whole frame 10 . The sealing lip 30 extends from the radially inner end of the frame radial porti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/3248F16J15/3244F16C33/78
CPCF16C33/7823F16J15/3244F16J15/3248
Inventor 刘鑫张岳林乌维·尼伯林吉尔森·阿瑞玛
Owner SCHAEFFLER TECH AG & CO KG