流体机械2025，Vol.53Issue(10)：27-34,45,9.DOI:10.3969/j.issn.1005-0329.2025.10.004
电动汽车涡旋压缩机涡旋腔非对称压力分布成因及特性分析
Cause and characteristic analysis of asymmetric pressure distribution in scroll chambers of electric vehicle scroll compressors
摘要
Abstract
To investigate the causes and characteristics of asymmetric pressure distribution in scroll chambers,mathematical models for geometric analysis and thermodynamic processes were established based on asymmetric features.Dynamic pressure measurement tests inside the scroll chamber of an electric vehicle scroll compressor were conducted,validating model rationality.Under pressure ratios of 2 and 5 and rotational speeds of 3 000 r/min and 8 000 r/min,pressure variations in scroll chambers,valve rear chambers,exhaust ports,and pressure relief ports versus orbiting scroll angle were calculated.Results show that with a 50° difference in end angles between fixed and orbiting scrolls,a pressure difference of approximately 0.02 MPa exists in bilateral scroll chambers during early-mid compression.At pressure ratio 5,asymmetric pressure distributions remain similar across speeds,with maximum discharge pressure reaching 2.1 MPa at high speeds indicating severe over-compression.At 3 000 r/min,asymmetric pressure characteristics differ with increasing pressure ratios due to changes in the relative magnitude of designed internal versus operational external pressure ratios.Under low pressure ratios,implementing pressure relief structures reduces indicated power by 1.4%at 3 000 r/min but increases it by 0.65%at 8 000 r/min compared to non-relief configurations.This study provides guidance for scroll profile design and optimization.关键词
电动汽车涡旋压缩机/数学模型/非对称压力分布/泄压过程Key words
electric vehicle scroll compressor/mathematical model/asymmetric pressure distribution/pressure relief process分类
机械制造引用本文复制引用
赵子博,吴建华,王澈..电动汽车涡旋压缩机涡旋腔非对称压力分布成因及特性分析[J].流体机械,2025,53(10):27-34,45,9.基金项目
国家自然科学基金项目(52406026) （52406026）
