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볼 베어링의 예압을 고려한 수평형 전동기의 동특성 연구
정덕현(Dukhyun Chung),문병윤(Byoungyun Moon),박현용(Hyunyong Park) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
It is known that the vibration and noise problems in rotating machines can be alleviated by imposing preload on deep-grooved ball bearings. Many previous technical reports studied that preloads on bearings can change the axial rigidity of the bearings, which in result changes the natural frequency of rotating machines. This paper presents change of the ball bearing’s axial rigidity, as preload to the outer ring of the bearing varies. Preloads are applied by two cases, Coil Spring and Wave Spring. Finite element analysis is conducted in creating the correlation graph between preload and rigidity change of bearings. Subsequently, modal analysis is carried out to find out how preload and bearing axial stiffness affect natural frequency of motor. This paper can be used to avoid the resonance problem in the case where preload is applied to bearings and motors.