迴轉式壓縮機泵浦吐出口閥片厚度對性能影響之研究

The Influence of the thickness of pump discharge valve on the performance of Rotary Compressor

黃克倫(Ke-lun Huang)

指導教授 ： 洪勵吾

國立中央大學/工學院/機械工程研究所碩士在職專班/碩士(2014年)

摘要

本研究利用R410A冷媒所對應的莫利爾曲線，求得壓縮機在不同工作參數下，所對應理論吸入、吐出之溫度與壓力，再由冷媒的熱力性質，求得腔室內每曲軸角度對應不同的體積下，造成腔室內的壓力變化。

再使用ANSYS軟體來模擬迴轉式壓縮機運轉過程閥片位移，利用閥片的材料機械性質(密度、楊式係數、蒲松比)，和固定上支座各零件組合幾何，藉由改變閥片厚度參數，求得瞬時壓縮腔室吐出口閥片內外部之壓力所對應不同閥片位移量與壓縮機性能之影響。

模擬結果顯示，相同壓力下之0.305mm閥片位移量較0.25mm低4.1%，因位移減少，閥片閉合時，高壓端逆流減少，使得效率提升。經實驗驗證，性能測試結果0.305mm閥片提升EER能量效率比
(Energy Efficiency Ratio)1.8%；本研究藉由模擬可合理的解釋實驗結果。

關鍵字

迴轉式壓縮機 ； R410A冷媒 ； 吐出口閥片

並列摘要

Mollier chart of R410A refrigerant is used to obtain the corresponding theoretical suction temperatures, discharge temperatures, densities and pressures at different working
conditions. Then the corresponding volumes and pressures at different crank angles are calculated based on its thermodynamic properties.

ANSYS is used to simulate the valve displacement of the rotary compressor under different operation processes. Under the fix of valve material mechanical properties (density, Young's modulus and Poisson's ratio) and top flange parts, by changing the valve thickness only, the instantaneous valve displacement and the compressor performance caused by the difference between internal and external pressures of the compressor chamber.

Simulation shows that the displacement of 0.305mm valve is lower by 4.1% compared with that of 0.25mm valve under the same pressure loading. The experimental test verifies that 0.305mm valve increases the energy efficiency ratio EER (Energy Efficiency Ratio) by 1.8%. The simulated and experimental results are consistent each other.

並列關鍵字

rotary compressor ； R410A refrigerant ； discharge valve

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