Vibration-Pulse Method of Assessing Technical Condition of Ball Bearings. Study of Shock Pulses Parameters when Wearing Bearing Elements

Abstract

The issues of application of vibration-pulse method of assessing technical condition of ball bearings are investigated for an estimation of influence of wear of their working surfaces on shock pulses parameters. Urgency of development of methods for in-place vibration diagnostics of magnitude wear in the bearings is justified. The changes associated with the refinement of the calculation of the impact action time are proposed by introducing an additional parameter depending on the radial force acting on the shaft into the initial formula. It is shown that wear process, being the cause of increasing of the working radial clearance between the raceways and the rolling elements in the bearing, increases the force of the shock pulse and affects the time of the shock interaction. The problems of calculation and rationing of the radial clearance and the amount of wear in ball bearings are considered. The example of calculation of shock pulse parameters taking into account change of size of wear in ball radial single-row bearings of series 307 is given. The features of precessional motion of the shaft caused by the presence of centrifugal force, and the formation of shock pulses for bearings operating at high rotational speeds are considered.

Keywords

• bearing
• technical condition
• diagnostics
• shock pulse
• shock pulse parameters
• radial clearance
• wear