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由于液体火箭发动机涡轮泵运行状态的好坏直接影响发动机的性能和可靠性,所以对其进行超速疲劳试验是检验涡轮泵转子系统高速旋转时稳定性的可靠保证。低温氢转子转速高、动能大,实际工作中又受低温环境、振动等多种复杂因素的影响,给涡轮转子的结构强度和稳定性带来很大挑战。为确保涡轮泵产品运行的稳定性,研究其高速离心时的变形特性对保证涡轮泵产品的结构强度和可靠性具有重要意义。建立了涡轮等部件的有限元模型,研究应力分布和形变特性,在理论研究的基础上开展了试验研究,验证了产品设计的可靠性,为发动机的可靠运转提供保证。
As the performance of liquid propellant rocket engine turbopump directly affects the performance and reliability of the turbopump, its over-speed fatigue test is a reliable guarantee for the stability of the turbo-pump rotor system at high speed. Low temperature hydrogen rotor high speed, kinetic energy, practical work and by the low temperature environment, vibration and other complex factors, to the turbine rotor structural strength and stability posed great challenges. In order to ensure the stability of turbo-pump products, it is important to study the deformation characteristics of turbo-pump products at high speed to ensure the structural strength and reliability of turbo-pump products. The finite element model of turbine and other components is established, the stress distribution and deformation characteristics are researched, and the experimental research is carried out on the basis of theoretical research to verify the reliability of product design and provide guarantee for the reliable operation of the engine.