[2F3] Impact of low inner ring waviness orders on hybrid ball bearing under high speeds
S Berrada¹,²,³, R Serra²,³, P Dalen⁴ and C Chastagner¹
¹SKF France, France
²Institut National des Sciences Appliquées Centre Val de Loire, France
³Laboratoire de Mécanique Gabriel Lamé, France
⁴SKF RTD, Netherlands
Deep-groove ball bearings (DGBBs) are widely used in rotating equipment in many fields, among which are electric vehicle powerpacks, so very demanding in terms of noise and vibration.
Geometrical design, clearance, component material and lubricant properties influence vibratory behaviour and bearing lifecycle. In rotating machines, bearings act as friction reducers to allow a smooth rotation, but they are also exciters inducing vibrations due to the rotation of the ball set, even in the case of a theoretical perfect bearing. Bearing performance depends highly on contact surface quality (ring races and ball surfaces). In a ball bearing, contact surface quality results from several manufacturing processes (heat treatment, turning, grinding, honing and assembly) and directly affects the noise and vibration levels generated by the bearing in the application. Also, component materials and hardness will affect the contact forces between balls and ring paths on rotating bearings. Hybrid bearings are known for their performance when operating under high rotational speeds. In this work, inner and outer ring low waviness orders are studied on hybrid deep-groove ball bearings. Both a numerical model and experimental tests are carried out to study the effect of ring waviness on hybrid bearings under high rotational speed.
Keywords: Hybrid ball bearing, bearing dynamics, ceramic ball, waviness, vibration, deep-groove ball bearing, high-speed applications, dynamics of ball bearings, bearing frequencies, inner ring waviness, low-order waviness.
Geometrical design, clearance, component material and lubricant properties influence vibratory behaviour and bearing lifecycle. In rotating machines, bearings act as friction reducers to allow a smooth rotation, but they are also exciters inducing vibrations due to the rotation of the ball set, even in the case of a theoretical perfect bearing. Bearing performance depends highly on contact surface quality (ring races and ball surfaces). In a ball bearing, contact surface quality results from several manufacturing processes (heat treatment, turning, grinding, honing and assembly) and directly affects the noise and vibration levels generated by the bearing in the application. Also, component materials and hardness will affect the contact forces between balls and ring paths on rotating bearings. Hybrid bearings are known for their performance when operating under high rotational speeds. In this work, inner and outer ring low waviness orders are studied on hybrid deep-groove ball bearings. Both a numerical model and experimental tests are carried out to study the effect of ring waviness on hybrid bearings under high rotational speed.
Keywords: Hybrid ball bearing, bearing dynamics, ceramic ball, waviness, vibration, deep-groove ball bearing, high-speed applications, dynamics of ball bearings, bearing frequencies, inner ring waviness, low-order waviness.
