Simulation evaluation method of compressor piping vibration of constant frequency air conditioner

Abstract

The invention relates to the piping field of a compressor of a fixed frequency air conditioner. The invention solves the problems that the piping mode analysis of the fixed frequency air conditioner can not be quantified and the natural frequency point of the pipe which is close to the operation frequency of the compressor can not be accurately judged according to the piping mode analysis, and a simulation evaluation method of the compressor piping vibration of the constant frequency air conditioner is presented. The main points of the technical scheme are as follows: firstly, the accurate finite element model of the compressor pipe is determined; secondly, the boundary conditions are applied to the finite element model and the modal analysis is carried out; then, whether the modal analysis result accords with the evaluation standard of piping modal analysis is judged, if so, the compressor pipe is trial-manufactured, otherwise, boundary conditions and load excitation are applied to the determined finite element model, and harmonic response analysis is performed; then whether the harmonic response analysis result accords with the piping harmonic response analysis evaluation criteria is determined, if so, the compressor pipe is trial-manufactured, otherwise, the finite element model is re-determined after pipe structure optimization.

Description

technical field [0001] The invention relates to the piping technology of the compressor of the fixed-frequency air conditioner, in particular to the technology of simulating the vibration of the piping of the compressor of the fixed-frequency air conditioner and establishing a quantitative simulation evaluation standard. Background technique [0002] In the air-conditioning industry, the simulation of the compressor piping of fixed-frequency air conditioners is only modal analysis, and then the distance between the natural frequency of the piping obtained by the modal analysis and the operating frequency of the compressor is used to evaluate whether the piping vibration is good. Although this method can guide the optimization of piping in the piping design process, thereby reducing piping vibration, this method has limitations in some cases. This limitation is mainly manifested in two points: First, there is a lack of clear and quantitative indicators to evaluate the vibrati...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a simulation evaluation method for the vibration of the compressor piping of a fixed-frequency air conditioner, so as to solve the problem that the modal analysis of the current fixed-frequency air-conditioner piping cannot be quantified and the piping modal analysis cannot be performed on piping that is close to the operating frequency of the compressor. Accurate evaluation of natural frequency points

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