Rolling bearing stiffness testing experiment device and experiment method thereof

Abstract

The invention discloses a rolling bearing stiffness testing experiment device and an experiment method thereof. The experiment device comprises a hydraulic initial pre-tightening module, a piezoelectric actuator pre-tightening force adjustment module and a frequency response function testing module. The hydraulic initial pre-tightening module comprises a hydraulic system, a hydraulic cylinder, a tension sensor, a tension display and a spindle; the piezoelectric actuator pre-tightening force adjustment module comprises a plurality of first pressure sensors, a plurality of piezoelectric actuators, an actuator hole seat, a rolling bearing, an end cap and a bearing seat; the frequency response function testing module comprises a plurality of acceleration sensors, a plurality of second pressure sensors, a plurality of vibration exciters, a data acquisition instrument, a computer and a signal generator. According to the experiment method, a mode of implementing combined pre-tightening to the rolling bearing is adopted, and stiffness of the rolling bearing is calculated in the frequency response function testing module. By the rolling bearing stiffness testing experiment device, dynamic test on the stiffness of the rolling bearing is realized through accurate adjustment of pre-tightening force of the rolling bearing.

Description

technical field [0001] The invention belongs to the field of performance testing of a main shaft-bearing system, and in particular relates to an experimental device and an experimental method for testing the stiffness of a rolling bearing. Background technique [0002] Bearing stiffness is a very important performance parameter in the spindle system. In the spindle-bearing system, the stiffness of the bearing is mainly affected by the bearing preload configuration, the size of the preload, the bearing pairing method, the cooperation between the bearing and the shaft, the spindle speed and It is determined by factors such as bearing temperature rise. With the development of high-speed and high-precision machining technology, more requirements are put forward for the spindle-bearing system, especially to ensure the spindle-bearing system has the best rigidity by accurately controlling the bearing preload. Therefore, the research is expected to It is very important to determin...

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Problems solved by technology

[0003] However, there is no device that can accurately test the stiffness of rolling bearings

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