Accession Number : AD0629038

Title :   DISTORTION OF GAS THRUST BEARING DUE TO VISCOUS SHEAR.

Descriptive Note : Technical rept.,

Corporate Author : MECHANICAL TECHNOLOGY INC LATHAM N Y

Personal Author(s) : PAN,C. H. T. ; Sternlicht,B.

Report Date : DEC 1965

Pagination or Media Count : 29

Abstract : Friction heat generated in the fluid film can distort the thrust surface and cause considerable reduction in load carrying capacity. In order to minimize the frictional power losses the bearing distortion must be minimized. The degree of distortion does not directly depend on the temperature level. The amount of distortion is enhanced by a large coefficient of thermal expansion and is reduced by a large coefficient of thermal conductivity. Large radius ratio bearings and/or high speed rotors are more sensitive to this type of thermal distortion. Analysis of a typical bearing design shows that the effects of thermal distortion can be significant for most structural materials. Materials for minimum thermal distortion are often not satisfactory with respect to structural considerations and from the standpoint of friction and wear. Application of surface coatings can alleviate the problem of friction and wear and permit the use of materials chosen for minimum thermal distortion. (Author)

Descriptors :   (*GAS BEARINGS, DEFORMATION), (*THRUST BEARINGS, DEFORMATION), FRICTION, HEATING, LOADS(FORCES), THERMAL EXPANSION, THERMAL CONDUCTIVITY, WEAR RESISTANCE, COATINGS

Subject Categories : Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE