Single-pivot double row rolling bearing supporting type rotor comprehensive performance experiment device

Abstract

The invention discloses a single-pivot double row rolling bearing supporting type rotor comprehensive performance experiment device comprising a variable frequency motor, an experiment main shaft, two bearing pedestals, a loading bracket, double rows of rolling bearings, an axial loading device and a radial loading device. The two bearing pedestals and the variable frequency motor are installed on an experiment table pedestal. The experiment main shaft is supported on the two bearing pedestals and connected with the variable frequency motor. The axial loading device and the radial loading device are arranged between the two bearing pedestals. The experiment main shaft is provided with the double rows of rolling bearings which are installed in a bearing sleeve. The bearing sleeve is installed on the experiment table pedestal. A temperature sensor and an acceleration vibration sensor are installed on the bearing sleeve. Axial loading and radial loading are performed on the double rows of rolling bearings by the axial loading device and the radial loading device so that axial and radial loads can be accurately applied to the tested double rows of rolling bearings simultaneously. The single-pivot double row rolling bearing supporting type rotor comprehensive performance experiment device can be used for simulating comprehensive performance of engine main shaft bearings under the complicated conditions of high temperature and high DN value.

Description

technical field [0001] The invention relates to an experimental device, in particular to an experimental device for the comprehensive performance of a single fulcrum double-row rolling bearing supported rotor. Background technique [0002] Bearing is one of the key components in rotating machinery, and its performance directly affects the performance and life of rotating machinery. Especially in the field of aerospace, taking aero-engine main shaft bearings as an example, the compressor and turbine main shafts are supported by rolling bearings. Ball bearings are usually used at the compressor end to determine the position of the main shaft, and cylindrical roller bearings are used at the turbine end to absorb the axial thermal expansion displacement of the main shaft after heating. The basic reasons for the use of rolling bearings in aeroengines are to minimize weight, reduce friction and power loss, reduce the amount of lubricating oil and cooling requirements, and be able...

AI Technical Summary

Problems solved by technology

Through the failure statistics of many aero-engine main shaft bearings in recent years, it can be found that with the development of bearing materials, the continuous improvement of the performance of bearing steel and better W or Mo series tool steel, the fatigue life of main shaft bearings has been greatly improved Fatigue is no longer the main problem in various failures of high-speed spindle bearings, but bearing failures caused by high DN values ​​such as accelerated bearing wear, high temperature rise, frequent impact, poor lubrication, and vibration have already Replace the fatigue damage of the bearing as the main damage factor of the bearing, and even cause catastrophic damage such as shaft locking and broken shaft

Moreover, most of the existing research technologies focus on a single rolling bearing, and there are few studies on the combination of two ball bearings on a single fulcrum or the combination of a ball and a roller on a single fulcrum, especially the contact friction caused by the rotating motion of the bearing under high DN operation. Frictional heat and stirring heat generated by stirring lubricating oil during high-speed rotation

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