국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Effect of Internal Clearance on Load Distribution and Life of Radially Loaded Ball and Roller Bearings
저자	Oswald, Fred B.;; Zaretsky, Erwin V.;; Poplawski, Joseph V.
Keyword	BALL BEARINGS;; CLEARANCES;; CYLINDRICAL BODIES;; DEFLECTION;; FATIGUE LIFE;; ITERATION;; LOADS (FORCES); MECHANICAL ENGINEERING;; ROLLER BEARINGS
URL	http://hdl.handle.net/2060/20120008398
보고서번호	NASA/TM-2012-217115
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	The effect of internal clearance on radially loaded deepgroove ball and cylindrical roller bearing load distribution and fatigue life was determined for four clearance groups defined in the bearing standards. The analysis was extended to negative clearance (interference) conditions to produce a curve of life factor versus internal clearance. Rolling-element loads can be optimized and bearing life maximized for a small negative operating clearance. Life declines gradually with positive clearance and rapidly with increasing negative clearance. Relationships were found between bearing life and internal clearance as a function of ball or roller diameter, adjusted for load. Results are presented as life factors for radially loaded bearings independent of bearing size or applied load. In addition, a modified Stribeck Equation is presented that relates the maximum rolling-element load to internal bearing clearance.