Preloaded assembly with thermal compensation

Details Preloaded assembly with thermal compensation Preloaded assembly with thermal compensation

1991-05-21

1993-10-05

Footland, Lenard A.

Bearings

Rotary bearing

Plain bearing

F16C 1722

Patent

active

052498697

ABSTRACT:
A preloaded assembly (100) in accordance with the invention includes a stationary bushing (14) having an annulus (18); a shaft (12) having a first thermal coefficient of expansion with the shaft being mounted for rotation in the annulus of the stationary bushing; a first sleeve (102) which contacts the first shaft along a first portion (106) of an outside surface (104) of the shaft with the first sleeve having a second thermal coefficient of expansion; a second sleeve (108) having a third thermal coefficient of expansion, an outer surface (22) facing the annulus of the stationary bushing and an annulus with a first axial section (114) of the annulus of the second sleeve contacting a second portion (112) of the outside surface of the shaft adjacent the first portion and a second axial section (116) of the annulus of the second sleeve contacting an outside surface (118) of the first sleeve; and wherein the second coefficient of thermal expansion is greater than the third thermal coefficient of expansion and the shaft and sleeves rotate without slippage in unison in response to torque when an axial preload is applied to the shaft and sleeves within a predetermined range.

REFERENCES:
patent: 3359047 (1965-05-01), Andersen
patent: 4410285 (1983-10-01), Strasser et al.
patent: 4623810 (1986-11-01), Smith
patent: 4848935 (1989-07-01), Seibig et al.
patent: 4869603 (1989-09-01), Melzer et al.
patent: 4952078 (1990-08-01), Ankenbauer et al.
patent: 5073039 (1991-12-01), Shervington

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