基于串联刚度模型的涡轮泵轴向力计算方法  

Calculation method of axial force in turbopump based on serial stiffness model

作　　者：李爱民[1] 金路[1] 苗旭升 李惠敏[1] 李春乐[1] LI Aimin;JIN Lu;MIAO Xusheng;LI Huimin;LI Chunle(Xi'an Aerospace Propulsion Institute,Xi'an 710100,China;Northwest Polytechnical University,Xi'an 710072,China)

机构地区：[1]西安航天动力研究所,陕西西安710100 [2]西北工业大学,陕西西安710072

出　　处：《火箭推进》2020年第6期30-34,共5页Journal of Rocket Propulsion

基　　金：国家重大基础研究项目(613321)。

摘　　要：转子轴向力为液体火箭发动机涡轮泵工作过程中的一项重要参数,把转子轴向力有效控制在主轴承的承载范围内是涡轮泵可靠工作的基础。为准确获取涡轮泵轴向力,采用基于串联刚度模型的方法,利用转子轴端位移和轴承的静刚度试验数据,结合有限元分析,得到某发动机涡轮泵转子轴系的轴向载荷,与轴向力传感器实测误差为4.1%。利用该方法,可实现涡轮泵试验过程中转子位移与轴向载荷之间的相互验证,提高测试数据可靠性,保证试验成功率,减少试验次数,降低试验成本。The axial force of rotor is an important parameter in the working process of liquid rocket engine turbopump.Controlling the axial force of rotor within the load carrying capacity that the main bearing,which is the foundation that turbopump can work in stability and reliability.Based on the serial stiffness model and the finite element analysis,combined with the test data of shaft displacement and the static stiffness of the bearing,the axial load of rotor shaft system in an engine turbopump was obtained.The relative error between the calculated value and the experimental value was 4.1%.By using this method,the rotor displacement and the axial load can be verified during the turbopump test,and the reliability of the test data can be improved.Therefore,it guarantees the success rate of test,and reduces the test time and expense.

关 键 词：涡轮泵 轴向力 串联刚度模型 轴承 

分 类 号：V434.21[航空宇航科学与技术—航空宇航推进理论与工程]