Vibration simulation of a ball bearing with the combined imperfections and velocity fluctuations

Abstract

For angular contact ball bearings (ACBBs), the unacceptable vibrations caused by the manufacturing errors including the roundness and waviness imperfections can greatly reduce their performances and service life. A clear vibration analysis of ACBBs excited by the manufacturing errors can provide some new guidance for their quality diagnosis and life improvement. A dynamic model considering the time-dependent excitations generated by the combined imperfections including the roundness and waviness in an ACBB is conducted. The influence of the cage speed fluctuation is also formulated. Note that the vibrational frequency components (FCs) excited by the combined imperfections on the outer and inner raceways of ACBB are distinguished from each other. When the waviness order is the integer multiple of the number of balls, the vibration of inner raceway is greater than those of other cases. When the axial force reaches the minimum value, the ball will reach its theoretical revolution speed; and the sliding motion between the ball and raceway should be suppressed basically.

Highlights

• A dynamic model considering the combined imperfections for ACBB is conducted.

• Time-dependent excitations generated by combined imperfections is formulated.

• Influence of the cage speed fluctuation is also formulated.

Keywords:

• Angular contact ball bearing (ACBB)
• angular velocity fluctuations
• dynamic model
• waviness and roundness
• frequency component (FC)

Disclosure statement

The authors declared that they have no conflicts of interest.

Additional information

Funding

National Natural Science Foundation of China No. 52175120 and 51975068; and Natural Science Foundation of Chongqing Contract No. cstc2019jcyj-msxmX0023.