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Press in place seal

A technology of seals and beading, applied in the direction of engine seals, engine components, mechanical equipment, etc., can solve the problems of seal rolling or twisting, leakage, seal failure, etc.

Inactive Publication Date: 2012-09-12
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This movement can cause the seal to roll or twist, allowing fluid to flow around the seal and leak
[0005] Furthermore, when used at higher pressures, known seals may begin to fail by being squeezed across the interface between the two structures, as the highest strain experienced by the seal during use was found to be located immediately adjacent to the two structures. surface of the interface of a structure

Method used

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Examples

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Embodiment Construction

[0032] As used herein, approximately means plus or minus 10% of the value.

[0033] refer to figure 1 , an exploded perspective view showing an example of an embodiment of the present invention. As shown, the assembly 100 includes a first structure 102 , a second structure 104 and a PIP seal 106 . The first structure 102 and the second structure 104 are components of a machine that requires a fluid seal at the interface between the first structure 102 and the second structure 104 . The first structure 102 includes a channel 110 having a generally rectangular cross-section. Channel 110 surrounds edge 112 of opening 114 . The second structure 104 includes a mating opening 120 and covers the channel 110 when assembled.

[0034] Fluid may pass through opening 114 and mating opening 120 . The pressure of the fluid can be pulsed or held at high pressure for a period of time. The pressure of the fluid is applied to the PIP seal 106 and the interface between the first structure ...

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PUM

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Abstract

A press-in-place or "PIP" seal has a length and a cross section. The cross section, when in an uncompressed state, includes a top portion that includes a first bead and a second bead. The top portion has a seal width. The cross section further includes a bottom portion having a third bead and a fourth bead. The bottom portion has a narrow width that is narrower than the seal width. A first side surface connects the third bead with the first bead and a second side surface connecting the fourth bead with the second bead.

Description

technical field [0001] The present invention relates generally to press-in-place "PIP" seals for sealing an interface between two surfaces. Background technique [0002] Seals are used in numerous applications to prevent fluid from leaking between two structures. Many seals include spaced flexible protrusions that hold the seal in channels of the structure during assembly. However, at higher pressures, such as 27.6 MPa or more, such spaced apart flexible protrusions may affect the contact pressure between the seal and the channel, causing leakage to occur. For example, in US Patent No. 5,002,290, a seal is configured to provide fluid tightness but includes such spaced apart flexible protrusions. [0003] Furthermore, such intermittent protrusions may act as stress concentrators leading to seal failure. [0004] These seals may also fail due to movement in response to applied pressure. This movement can cause the seal to roll or twist, allowing fluid to flow around the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/06F16J15/02
CPCF16J15/024F16J15/062
Inventor C·J·斯蒂克灵
Owner CATERPILLAR INC