电动汽车空调变工况背压腔流场特性研究
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摘要
鉴于电动汽车空调系统工况具有复杂多变的特点,对其采用的涡旋压缩机背压腔展开变工况特性研究。在考虑平衡块搅动影响的基础上,运用FLUENT滑移网格技术,模拟变工况下不同入口压力的背压腔流场分布特性。结果表明,在变工况下,背压腔流场分布、提供的轴向平衡力和润滑油循环量均发生规律性变化。并提出了将轴向平衡力与轴向气体力变相位协调叠加以达到动涡盘最佳运行状态的新设计方法,使动涡盘所受轴向合力的振幅减少了31%。
In view of complex and changeable characteristics of operating conditions of electric vehicle A/C system,research is conducted on the performance of back pressure chamber under off-design conditions of its scroll compressor. In consideration of the influence of balance weight agitation,the flow distribution characteristics of the back pressure chamber with different inlet pressure under variable operating conditions is simulated by FLUENT sliding mesh technique. The results show that the flow distribution of the back pressure chamber,the axial balance force and the amount of circulating oil change regularly under variable operating conditions. A new design method is proposed to coordinate the design of the axial balance force and the axial gas force angle position in order to optimize the operation of the orbiting scroll,with the axial force amplitude reduced by 31%.
In view of complex and changeable characteristics of operating conditions of electric vehicle A/C system,research is conducted on the performance of back pressure chamber under off-design conditions of its scroll compressor. In consideration of the influence of balance weight agitation,the flow distribution characteristics of the back pressure chamber with different inlet pressure under variable operating conditions is simulated by FLUENT sliding mesh technique. The results show that the flow distribution of the back pressure chamber,the axial balance force and the amount of circulating oil change regularly under variable operating conditions. A new design method is proposed to coordinate the design of the axial balance force and the axial gas force angle position in order to optimize the operation of the orbiting scroll,with the axial force amplitude reduced by 31%.
引文
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[8]孙乐,李红旗,程睿,等.纯电动汽车空调系统负荷特性的试验研究[J].汽车工程,2014,36(8):1014-1018.
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[10]吴建华,束鹏程.涡旋压缩机的动力分析[J].制冷学报,1995(4):1-8.
[2]闫福珑.纯电动乘用车热泵空调系统设计与性能仿真研究[D].长春:吉林大学,2012.
[3]彭庆丰,赵韩,陈祥吉,等.电动汽车新型热泵空调系统的设计与试验研究[J].汽车工程,2015,37(12):1467-1470.
[4]刘向农.汽车空调冷凝器的匹配设计研究[J].合肥工业大学学报(自然科学版),2002,25(1):139-142.
[5] MAERTENS M J,RICHARDSON H. Scroll compressor operating envelope considerations[C]. Proc. of International Compressor Engineering Conference at Purdue,1992:587-591.
[6] NAM D,LEE P,LEE G,et al. Optimization of an oil charge amount on electric driven scroll compressor for eco-friendly vehicle[J]. International Journal of Refrigeration,2015,57:54-61.
[7]唐光德,王文彦,许修铭.涡旋式压缩机轴向柔性补偿机构设计[J].暖通空调,2006,36(b02):16-19.
[8]孙乐,李红旗,程睿,等.纯电动汽车空调系统负荷特性的试验研究[J].汽车工程,2014,36(8):1014-1018.
[9] GENNAMI H,KIMURA K,SUITOU K,et al. Electric compressor:US2004191083 A1[P]. 2004-03-30.
[10]吴建华,束鹏程.涡旋压缩机的动力分析[J].制冷学报,1995(4):1-8.