Claims
- 1. A mechanical seal assembly for sealing a rotary shaft to a housing having a shaft opening through which the shaft extends, comprising:
- a rotatable seal ring encircling and connected to said shaft for rotation therewith and for limited axial movement relative to said shaft;
- a stationary seal ring encircling said shaft and connected to said housing;
- said rotatable and stationary seal rings having opposed and generally radial sealing surfaces; and
- means for urging one seal ring toward another;
- said rotatable seal ring being of stepped configuration and consisting of two unitary ring portions, each ring portion having the same axial dimension, one ring portion having inner and outer diameters greater than the inner and outer diameters of the other ring portion;
- the diameters of the ring portions being selected to provide a desired degree of deflection of the sealing surface of said rotatable seal ring.
- 2. A mechanical seal assembly as recited in claim 1, in which the shrinkage of each ring portion is determined by the equation: ##EQU2## where U=shrinkage
- a=inside radius
- b=outside radius
- p=pressure
- E=modulus of elasticity, and
- v=Poisson's ratio.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part application of my copending application, Ser. No. 314,302, filed Oct. 23, 1981 and entitled "Improved Mechanical Seal Assembly" and now abandoned.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
314302 |
Oct 1981 |
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