迴轉式壓縮機之泵零件與組合件模型驗證

Model Verification of Pump Components and its Assembly for Rotary Compressor

王栢村(Bor-Tsuen Wang) ； 林建敦(Chien-Tui Lin) ； 吳秉修(Bing-Hsiu Wu) ； 陳金龍(Chin-Lung Chen) ； 徐維良(Wei-Liang Hsu) ； 謝長鴻(Chang-Hung Hsieh)

《中華民國振動與噪音工程學會論文集》 2014 (2014/06) Pp. 251-258

摘要

單缸變頻迴轉式壓縮機主要以壓縮機本體以及儲液瓶所組成，泵零件與組合件為壓縮機重要零組件之一。本文主要建立泵組合件之有限元素模型，以能探討其結構動態特性，有助於整體壓縮機振動與噪音之診斷，分別運用有限元素分析（FEA）與實驗模態分析（EMA），進行泵零件與組合件模型驗證。首先介紹泵6個零件與組合件之模型驗證理念，每一零件均執行有限元素分析與實驗，有限元素模型進行理論模態分析（TMA），實驗與分析皆得到結構模態參數，結果顯示，每個零件之有限元素模型經模態參數比對進行校準比對，獲得良好的驗證結果以確保有限元素模型之正確性。泵組合件結構模型由組件間之接觸模擬進行理論模態分析（TMA）且得到結構自然頻率與對應之模態振型，以實驗所得模態參數用於校正有限元素模型之接觸參數，泵組合件之有限元素模型得到合理之校驗，進一步運用於其他子結構之組件進行分析，藉由模態振型所提供的物理意義以了解結構模態特性，泵組合件獲得等效於實際結構之有限元素模型，與壓縮機其他子系統進行次組合分析與實驗，為壓縮機之初始設計、振動與噪音做輔助診斷的重要關鍵。

關鍵字

有限元素分析 ； 實驗模態分析 ； 模型驗證 ； 迴轉式壓縮機 ； 泵組合件

並列摘要

The rotary compressor is composed of the compressor body and accumulator. The pump components and its assembly are one of key components in the compressor. This work aims to show the simulation techniques in constructing the finite element model for the pump assembly so as to investigate its structural dynamic properties, which might affect the vibration or noise response for the compressor. Both finite element analysis (FEA) and experimental model analysis (EMA) are adopted to perform model verification on the pump components as well as the pump assembly structure. The idea of model verification is first introduced. There are six pieces of components for the pump assembly. The FE model for each component is constructed and performed theoretical model analysis (TMA) to obtain structural model parameters, while EMA is conducted for the component. Results show the FE model can be well calibrated through the comparison of model parameters to ensure the correctness of FE model. The pump assembly structural model that consists of contact simulation between components is then integrated to perform TMA so as to get structural natural frequencies and corresponding mode shapes. The experimentally extracted model parameters are used to calibrate the contact parameters in the FE model. The FE model for the pump assembly can be reasonably calibrated and used for further assembly analysis in conjunction with other substructures. Visualized vibration mode shapes also provide physical insights of model properties for the pump structures. The buildup analytical and experimental approaches in obtaining the equivalent FE model for the pump as well as other subsystems are crucial for initial design evaluation and helpful in assisting noise and vibration diagnosis for the compressor.

並列關鍵字

Finite Element Analysis ； Experimental Model Analysis ； Model Verification ； Rotary Compressor ； Pump Assembly