Comprehensive test experiment device for dynamic and static properties of rolling bearing-main shaft system

Abstract

A comprehensive test experiment device for dynamic and static properties of a rolling bearing-main shaft system comprises a main shaft in which the front end is installed on a front end bearing support saddle; the end surface of the front end bearing support saddle is provided with three laser displacement sensor test probes; the front end bearing support saddle is internally provided with an experiment bearing; load is carried out through a radial load hydraulic tank and an axial load hydraulic tank; the back end of the main shaft is assembled on a back end bearing support saddle, and the back end bearing support saddle is configured to be paired angle contact bearings, and both an integrated monitoring ring and a pre-tightening push block are installed between the angle contact bearings to realize self-adapting pre-tightening of the bearing; the main shaft is provided with an eccentric quality shock excitation disk for applying bearing shock excitation; and the main shaft is driven by a variable-frequency electric motor. The comprehensive test experiment device for dynamic and static properties of a rolling bearing-main shaft system is used for detecting the influence on the dynamic and static properties of multiple types of bearings and the main shaft system, thereby overcoming the defect that the existing rolling bearing-main shaft experiment platform has the characteristics of single-type tested bearing, too low integration degree and rough single processing, being capable of carrying multiple experimental researches, and improving the flexibility of the rolling bearing-main shaft experiment platform.

Description

technical field [0001] The invention relates to a test experiment device, in particular to a comprehensive test experiment device for dynamic and static characteristics of a rolling bearing-spindle system. Background technique [0002] The dynamic characteristics of the bearing have an important influence on the dynamic characteristics of the rotor-bearing system. But so far, there is still a lack of systematic data on the dynamic characteristics of rolling bearings. Generally, the stiffness characteristics are estimated according to empirical formulas or simplified to constant elastic elements, but the error is relatively large. The existing rolling bearing test bench mainly has a rolling bearing life test bench with an inner diameter of 2-180mm, and there is no patented product for the multifunctional test bench based on the rolling bearing-shafting characteristic test. [0003] There are mainly two test methods for the dynamic characteristics of rolling bearings, indirec...

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Problems solved by technology

[0007] 1. The existing experimental devices for the dynamic characteristics of the rolling bearing-spindle system are too single in function, and only test a certain test performance, such as the static stiffness and life of the rolling bearing or the dynamic stiffness of the rolling bearing, and cannot verify the influence of the bearing characteristics on the performance of the bearing-spindle system. It has not been realized to integrate it in a test bench; the test of the influence of preload on its stiffness, temperature and other bearing characteristics and the research of the influence of spindle machining accuracy have not been realized

[0008] 2. Of the existing rolling bearing test benches, only the fatigue life testing machine can realize the bearing life test of a series of inner diameters, and there is no special test bench for the influence of bearings on the performance of the main shaft

[0009] 3. The existing rolling bearing test benches usually use orthogonal electric eddy current displacement sensors to measure the vibration displacement of the main shaft, which cannot effectively separate the influence of the shape and position error of the structure on the test results

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