汽车工程

汽车工程 ›› 2018, Vol. 40 ›› Issue (10): 1239-1245.doi: 10.19562/j.chinasae.qcgc.2018.010.017

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电动汽车空调变工况背压腔流场特性研究*

刘兴旺, 万春焕   

  1. 兰州理工大学石油化工学院,兰州 730050
  • 收稿日期:2017-06-13 出版日期:2018-10-25 发布日期:2018-10-25
  • 通讯作者: 万春焕,硕士研究生,E-mail:wch20111126@163.com。
  • 基金资助:
    *国家自然科学基金(51265025和51265027)资助。

A Study on Flow Characteristics of Back Pressure Chamber Under Off-design Conditions of Electric Vehicle Air Conditioning

Liu Xingwang, Wan Chunhuan   

  1. School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050
  • Received:2017-06-13 Online:2018-10-25 Published:2018-10-25

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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%。

关键词: 电动汽车, 空调, 变工况, 涡旋压缩机, 背压腔

Abstract: 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%

Key words: electric vehicle, air conditioning, off-design condition, scroll compressor, back pressure chamber