Elastic support capable of measuring axial load of rotor

Abstract

The present invention provides an elastic support capable of measuring an axial load of a rotor. The elastic support comprises a mounting base and a cylindrical support part connected with the mounting base; the support part includes a connection end 1, a connection end 2 and an elastic bar located between the connection end 1 and the connection end 2; the connection end 1 is connected with the mounting base, and the connection end 2 is disposed between the oil film inner ring of the support part and the bearing outer ring; the elastic support also comprises an elastic ring; the elastic ring is arranged in the connection end 2; load boss are arranged at one side of the elastic ring close to the bearing; the load boss is contacted with the bearing outer ring, and a connection boss is fixed at the other side of the elastic ring; the connection boss is fixed with the inner wall of the connection end 2; the outer diameter of the elastic ring is smaller than the inner diameter of the connection end 2; and a strain gage is pasted at the press stress position close to the load boss, and a strain gage is also pasted at the tension stress position between two load bosses. The elastic support capable of measuring an axial load of a rotor provided by the invention has advantages of simple and compact whole design, high operability, high reliability and repeated usage.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to an elastic support capable of measuring the axial load of a rotor. Background technique [0002] From the start of the engine to the maximum operating speed, the engine must pass through the first-order, second-order or even third-order critical speed. When the rotor passes through the critical speed quickly, the rotor will vibrate greatly. The rotor of the aero-engine is equipped with an elastic support, which can play the role of reducing vibration and amplitude, and can effectively adjust the critical speed of the rotor, so that the critical speed of the rotor can be adjusted beyond its working speed, so as to ensure that the rotor passes the critical speed safely. [0003] When the compressor rotor is working, it will generate forward axial load, and when the turbine rotor is working, it will generate backward axial load. The compressor rotor compresses the gas to do w...

AI Technical Summary

Problems solved by technology

During its assembly and use with the elastic support, the signal line of the elastic ring sensor is cut off due to improper assembly or the circumferential rotation of the elastic ring sensor, so that the test task cannot be completed

It is troublesome to test the signal line from the elastic support. If it is not handled properly, it may scratch the high-speed rotating rotor

At the same time, the elastic ring sensor is matched with the inner ring of the elastic support bearing seat. If the design of the matching gap between the two is too small, the actual measurement load will be too small due to the need to overcome the friction between the two during measurement; if the matching gap between the two is too large, it is difficult to ensure The elastic ring sensor in the installed state is concentric with the elastic support, which may cause the elastic ring sensor to be unbalanced

In addition, if the flatness and parallelism of the two ends of the elastic ring sensor are not good, it will also cause the unbalanced load of the bearing during work, which will have a great impact on its measurement results

[0007] There are no other technical reports on the elastic support design and device for measuring the axial load of the rotor in the existing public information

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