文档介绍：部分负荷下螺杆压缩机电机内流动与换热研究

陈文卿沈九兵吴华根邢子文

(西安交通大学能源与动力工程学院,西安 710049)

摘要 YSR 系列鼠笼式三相异步感应电机广泛应用于半封闭螺杆制冷压缩机中,由压缩机吸气冷
却电机。为研究冷媒对电机的冷却效果,确保电机安全可靠地长期运行,考察冷媒流经电机后的温
升及压力损失对压缩机性能的影响,基于流体网络和等效热路理论建立了部分负荷下半封闭螺杆制
冷压缩机用电机内流动与换热数学模型,并对其进行了试验验证,分析了不同负荷下定子绕组温度
分布,冷媒温升和压降,以及压缩机功耗和容积效率等宏观性能参数的的变化趋势。研究表明,定
子绕组温度和冷媒流经电机后的过热度随负荷下降而快速上升,不可逆损失增加,为保证电机绝缘
可靠性和效率,应避免压缩机在过低负荷下长时间运行。
关键词部分负荷半封闭螺杆制冷压缩机电机流动换热过热度压降

FLOW AND HEAT TRANSFER ANALYSIS OF THE MOTOR IN SCREW
COMPRESSOR

Chen Wenqing Shen Jiubing Wu Huagen Xing Ziwen
(School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049)

Abstract YSR series squirrel cage three phase asynchronous induction motor is widely used in
semi-hermetic twin screw pressor, the motor is cooled pressor suction refrigerant.
To research cooling effects of the motor and influences of refrigerant temperature rise and pressure drop
through the motor on performance of pressor package, ensure reliable continuous operation, a
mathematical model describing flow and heat transfer characteristics of the motor in semi-hermetic twin
screw pressor under part-load conditions is built based on work and thermal
equivalent circuit theories. Experimental research is implemented and the model is verified to be
reasonable for temperature and pressure distribution evaluation inside the motor and investigation of their
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