【摘要】 阀片的运动在制冷压缩机性能模拟中非常重要,然而,制冷压缩机中簧片阀的推力系数很难获得,提出了一种测量簧片阀推力系数的方法。由于簧片阀的特性,我们用应变仪去测量簧片阀的推力系数,并用最小二乘法对实验数据拟合,得到了推力系数和阀片升程的相关性函数;另外,建立了计算流体动力学模型来探讨在不同气阀升程下作用在簧片阀上的力的分布。在这个模型中通过等效力矩法获得等效力,得到了实验中相应的作用在阀片上的力,并与实验结果进行了对比。结果表明:无论工作介质是R600a或者空气,虽然簧片阀的推力系数是关于气阀升程的函数,但其值始终是近似恒定的。更多还原

【Abstract】 The valve movement is essential in the performance simulation of a refrigeration compressor. However, it is usually hard to obtain the thrust coefficient of the reed valve in refrigeration compressor. In this paper, a method of measuring the reed valve thrust coefficients was presented. Due to the characteristic of the reed valve, a strain gauge was used to measure the reed valve thrust coef-ficient. The correlation function between the thrust coefficient and the reed valve lift were obtained by curve fitting using the method of least squares. In addition, Computational Fluid Dynamics model was built to explore the distribution of force on the reed valve un-der different valve lifts. In this model, an equivalent moment method is used to obtain equivalent force, corresponding to the force on the valve measured in the experiment, and we compared the experimental data and simulation data. The results indicated that no matter working medium is R600 a or air, the thrust coefficient of the reed valve is always an approximate constant as a function of the valve lift.更多还原