Fatigue life test stand for angular contact ball bearing

Abstract

The invention provides an apparatus for testing the fatigue life of a high-speed angular contact ball bearing. The apparatus tests the fatigue life of the angular contact ball bearing under the working condition of various rotary speeds and loads by adoption of a frequency converter to realize infinite variable speed of a high-frequency motor, adoption of a transmission shaft to drive the angular contact ball bearing to rotate at a high speed under certain pretightening force, and adoption of a weight to adjust and load the axial pretightening force. The apparatus overcomes the defects of complex structure, expensive price, trivial operation, large noise and so on of the prior apparatus for testing the fatigue life of the angular contact ball bearing, realizes zero transmission and lever loading, and has the advantages of superior high-speed performance, reliable test results, simple structure and low cost.

Description

1. Technical field [0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to an angular contact ball bearing fatigue life test bench. 2. Background technology [0002] Existing technology: At present, most of the fatigue life test devices for angular contact ball bearings adopt a horizontal structure, driven by a motor, accelerated by a belt transmission, and hydraulically applied with an axial pretightening force. However, such test benches generally have the following obvious disadvantages: [0003] 1) The power source (drive component) is connected to the tested bearing through a coupling, and the coaxiality of the shaft system is poor. In addition, some test benches use pulley transmission. Therefore, the impact load and noise generated during the test will cause the bearing to Fatigue life test results have large errors; [0004] 2) The horizontal structure generally adopts hydraulic loading (or other more complex mech...

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Problems solved by technology

[0003] 1) The power source (drive component) is connected to the tested bearing through a coupling, and the coaxiality of the shaft system is poor. In addition, some test benches use pulley transmission. Therefore, the impact load and noise generated during the test will cause the bearing to Fatigue life test results have large errors;

[0004] 2) The horizontal structure generally adopts hydraulic loading (or other more complex mechanical loading) technology, resulting in a complex structure and high cost of the loading system;

[0005] 3) The structure of the tested bearing part is complicated, the installation and disassembly are cumbersome, and the operation is inconvenient;

[0006] 4) With the traditional mechanical transmission speed-up technology, the high-speed performance of the test bench is poor, and it is only suitable for medium and low speeds (generally less than 10000rpm)

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