柴油机电动增压器电机轴设计及其流量特性研究  

Research on motor shaft design and flow characteristics of diesel engine’s electric supercharger

作　　者：钟应子 唐国强 韩伟强[2] ZHONG Ying-zi;TANG Guo-qiang;HAN Wei-qiang(School of Architecture and Civil Engineering,Chengdu University,Chengdu 610106;Key Laboratory of Automotive Measurement,Control and Safety,Xihua University,Chengdu 610039)

机构地区：[1]成都大学建筑与土木工程学院,四川成都610106 [2]西华大学汽车测控与安全四川省重点实验室,四川成都610039

出　　处：《机械设计》2022年第8期36-41,共6页Journal of Machine Design

基　　金：国家自然科学基金青年科学基金项目(52006182);四川省自然科学基金项目(2022NSFSC0196);广元市科技计划重点研发项目(21ZDYF0025);天津大学内燃机燃烧学国家重点实验室开放课题资助项目(K2018-02);西华大学2019年“青年学者”支持计划项目。

摘　　要：为改善柴油机加速时涡轮迟滞所带来的高碳烟、高油耗问题,设计了一款补气量不依赖柴油机工况的电动增压器。其结构设计的核心为电机轴的设计。电机轴设计需满足如下要求:压气机叶轮、压气机壳与电机轴刚性连接;压气机叶前间隙应在0.382~0.645 mm间。为此,重点探讨了电机轴各段尺寸的设计,以实现电动增压器响应快、流量大、效率高的工作特点。最后,将设计好的电动增压器流量特性进行了实测,并绘制了电动增压器的MAP图。结果表明,设计的电动增压器最大流量达610.5 kg/h时,增压比可达1.137,具有流量大,响应快,结构简单的优点,为改善柴油机加速性能提供了技术支撑。In this article,in order to solve the problems of high soot and high fuel consumption caused by turbine hysteresis during acceleration of the diesel engine,an electric supercharger,whose air compensation is independent of working conditions,is designed.The core of its structural design is the high-speed motor shaft.The design of the motor shaft shall meet the following requirements:The compressor impeller and the compressor housing shall be rigidly connected to the motor shaft,also,the compressor’s blade front clearance shall be between 0.382 mm and 0.645 mm.To this end,this article focuses on the design of the size of the motor shaft’s each section,in order to realize the characteristics of fast response,large flow rate and high efficiency of the electric supercharger.Finally,the electric supercharger’s flow characteristics are measured,and the MAP figure is drawn.The results show that the flow rate of the electric supercharger reaches up to 610.5 kg/h and the pressure ratio is 1.137.The electric supercharger has such advantages as large flow rate,fast response and simple structure.This study provides technical support for improving acceleration performance of diesel engines.

关 键 词：电动增压器 电机轴设计 刚性连接 流量特性 

分 类 号：TK413.4[动力工程及工程热物理—动力机械及工程]