Rotor supporting system dynamic similarity testing experiment table and testing method

Abstract

The invention relates to a rotor supporting system dynamic similarity testing experiment table and a testing method, and belongs to the technical field of vibration testing of a rotor supporting system in a large-scale rotary machine. A driving motor of the rotor supporting system dynamic similarity testing experiment table is installed on a base, and a coupler is arranged on a power output shaft of the driving motor. Bearing bases are located on the center axis of the power output shaft of the driving motor and arranged on the base, and the coupler corresponds to the bearing bases; an electrical vortex sensor is located between the two bearing bases and installed on the base through a sensor support. The testing method of the rotor supporting system dynamic similarity testing experiment table includes the following steps: selecting a prototype rotor supporting system for studying, determining relevant parameters of a model rotor supporting system for experimenting according to relevant parameters of the prototype rotor supporting system, manufacturing a model rotating shaft and a model rotary disc for experimenting, selecting model bearings with the corresponding support stiffness in a mated mode, testing the model rotor supporting system, and forecasting the inherent frequency, the vibration mode and the critical rotation speed of the prototype rotor supporting system according to the testing result.

Description

technical field [0001] The invention belongs to the technical field of vibration testing of a rotor support system in a large rotating machine, and in particular relates to a test bench and a test method for a dynamic similarity test of a rotor support system based on a dynamic similarity theory. Background technique [0002] As an important part of large rotating machinery such as gas turbines, aeroengines and compressors, the rotor support system has a direct impact on the overall performance of large rotating machinery. Vibration and noise will be generated during the rotation process, which will reduce the service life and work efficiency of the equipment in the slightest, and cause damage to the equipment in severe cases and cause major safety accidents. [0003] At this stage, the vibration test equipment of the rotor support system can only realize the natural frequency test, but cannot test the mode shape. Because the size of the rotor support system is generally lar...

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Problems solved by technology

[0002] As an important part of large rotating machinery such as gas turbines, aeroengines and compressors, the rotor support system has a direct impact on the overall performance of large rotating machinery. Vibration and noise will be generated during the rotation process, which will reduce the service life and work efficiency of the equipment in the slightest, and cause damage to the equipment in severe cases and cause major safety accidents

[0003] At this stage, the vibration test equipment of the rotor support system can only realize the natural frequency test, but cannot test the mode shape. Because the size of the rotor support system is generally large and the critical speed is high, it is very difficult to test the high-order critical speed. However, the existing The vibration test bench of the rotor support system is not perfect enough

[0004] With the increasingly higher requirements for the performance of large-scale rotating machinery, the research and development of large-scale rotating machinery has gradually become a hot spot. For large-scale rotor support systems, their natural frequencies are generally very high. Direct experiments are carried out during the design and research process. The cost is high and the experiment period is greatly extended

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