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Rotary face seal assembly

A technology for sealing components and sealing rings, which is applied in the direction of engine sealing, engine components, and surface-polished machine tools, and can solve problems such as joint leakage.

Inactive Publication Date: 2015-01-14
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This "gap period (run-in period)" can cause some initial leakage from the joint, which is unacceptable

Method used

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  • Rotary face seal assembly
  • Rotary face seal assembly
  • Rotary face seal assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Embodiments of seal assemblies, seal rings for seal assemblies, and methods suitable for making seal rings for seal assemblies are described herein. In embodiments, a sealing ring for sealing an assembly may include a sealing surface having a sealing band disposed adjacent an outer periphery of the sealing ring. The cross-section of the sealing band may be substantially flat between the inner radial edge and the outer periphery. The sealing tape can be brush polished such that the sealing tape has a consistent surface finish with an average surface roughness of about 0.08 microns Ra or less. The sealing surface may include an inner relief area tapered between the sealing band and the inner periphery of the sealing ring. There may be a radius between the relief area and the sealing strip. The radius may be a substantially consistent radius from the cone (sharp) of the inner relief region to the flat seal band. The outer periphery can be substantially free of burrs.

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PUM

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Abstract

A seal assembly, adapted to seal a joint having a first member pivotable about a rotational axis relative to a second member thereof, includes first and second annular seal rings and first and second annular load rings. The first and second seal rings each has a loading surface, extending axially, and a sealing face, extending radially to an outer perimeter. Each sealing face has a sealing band disposed adjacent the outer perimeter. The first and second seal rings abut one another such that the sealing bands of the first and second seal rings are in contacting relationship with each other. The first and second load rings engage the loading surface of the first and second seal rings, respectively. Each sealing band is brush polished such that it has a surface roughness average of about 0.08 micrometers Ra or less.

Description

technical field [0001] The present invention relates generally to seal assemblies for machines and equipment, and more particularly to seal assemblies having rotating faces. Background technique [0002] One type of seal assembly employed to keep lubricant near bearing surfaces between relatively moving parts and to keep foreign matter away from near bearing surfaces may include face seals in which relatively rotating The mating surface of the sealing part to achieve sealing. In seals employing two rings made of metal or other hard material that rotate relative to each other in face-to-face contact, it is highly desirable to create sealing surfaces that will withstand hours of harsh service and maintain a seal. [0003] In conventional finishing / surfacing processes, the sealing surfaces are made fairly flat. The sealing surface is then ground using aluminum grit (eg 15 microns). In some cases, the lapped sealing surface is polished with very fine sandpaper (eg, 600-1200 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/34B24B29/00
CPCF16J15/34B24B1/00F16J15/344F16J15/3496
Inventor B·毕晓普
Owner CATERPILLAR INC
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