R32 rotary compressor is commonly applied in the household air conditioner. The valve motion is significant to the performance and reliability of rotary compressor. Valve lift is an important factor which directly affects the valve motion. A suitable valve lift can both reduce power consumption and fracture risk of valve plate. Based on a compressor prototype, this paper developed a FSI model to simulate the working process of discharge valve. The simulation results show that a large valve lift means a large discharge effective flow area and a low indicated power. But both the velocity of valve plate impacting the retainer and the impact stress of valve plate are relatively large, which will lead to the fracture in the valve plate. The simulated initial impact location on the head of valve plate is near the oblique incision due to the uneven pressure distribution in the discharge port and the torsional movement of valve plate. The maximum impact stress distribution areas on the valve plate obtained from simulation results are matched with the fracture areas of two valve plate samples, which proves that the simulation results are accurate enough to guide the optimization design of discharge valve in the rotary compressor.

中文翻译：

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FSI对R32回转式压缩机排气阀升程的研究及验证


R32旋转式压缩机常用于家用空调。阀门运动对旋转式压缩机的性能和可靠性具有重要意义。气门升程是直接影响气门运动的重要因素。合适的气门升程既可以降低功耗，又可以降低阀板断裂的风险。本文以压缩机样机为基础，建立了FSI模型来模拟排气阀的工作过程。仿真结果表明，较大的气门升程意味着较大的排放有效流通面积和较低的指示功率。但阀板冲击保持器的速度和阀板的冲击应力都较大，会导致阀板断裂。由于排出口压力分布不均匀以及阀板的扭转运动，模拟阀板头部的初始冲击位置位于斜切口附近。仿真结果得到的阀板最大冲击应力分布区域与两个阀板样品的断裂面积相匹配，证明仿真结果足够准确，可以指导旋转式压缩机排气阀的优化设计。