Load excitation identification method of rotor compressor in refrigeration equipment under time-varying conditions

Abstract

The invention discloses a refrigeration equipment rotor compressor load excitation recognition method under the time-varying working condition. The method is characterized in that vibration testing is performed on a refrigeration equipment rotor compressor exhaust muffler opening under the time-varying condition, an actual measurement acceleration response time history signal of the rotor compressor exhaust muffler opening is obtained, and an acceleration expected response matrix is constructed; a finite element method is used for constructing a refrigeration equipment rotor compressor virtual model machine model, the virtual model machine model is applied to analyzing acceleration response of an exhaust muffler opening of the refrigeration equipment rotor compressor under the effect of white noise loads, and a transfer function matrix is obtained. Back calculation is performed on the result of vibration testing of the rotor compressor exhaust muffler opening measured point under the time-varying condition to perform load excitation of the refrigeration equipment rotor compressor under the time-varying condition, and an iterative method is adopted for eliminating errors. Refrigeration equipment rotor compressor load excitation recognition analysis under the time-varying condition is achieved, and the basis is provided for the compressor-pipeline system vibration analysis and pipeline structure reliability design, estimation and the like.

Description

technical field [0001] The invention relates to a load excitation identification method of a refrigeration equipment rotor compressor under time-varying working conditions, which is used for the vibration analysis of the refrigeration equipment compressor-pipeline system and the reliability design and evaluation of the pipeline structure under the time-varying working conditions. Background technique [0002] The rotary compressor is one of the most commonly used power devices in refrigeration equipment at present, and the identification of the load excitation of the rotary compressor in refrigeration equipment is the premise of dynamic analysis and evaluation of the compressor-pipeline system. The Chinese invention patent with the patent number CN104791234A discloses a "load excitation test analysis method under the start-up condition of the rotor compressor of the refrigeration equipment". However, it cannot identify the time history of the load excitation of refrigeration...

AI Technical Summary

Problems solved by technology

The Chinese invention patent with the patent number CN104791234A discloses a "load excitation test analysis method under the start-up condition of the rotor compressor of the refrigeration equipment". However, it cannot identify the time history of the load excitation of refrigeration equipment under any time-varying conditions

In fact, due to the influence of environmental conditions, the operating conditions of the refrigeration equipment rotor compressor are more complicated in most cases. Only through the time history of the refrigeration equipment rotor compressor load excitation under any time-varying conditions Only by identification can we provide a basis for the vibration analysis of the refrigeration equipment compressor-pipeline system and the reliability design and evaluation of the pipeline structure, but so far there is no public report on the relevant technical solutions

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