Effects of Rotor Parameters on Transient Process of Turbine
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摘要: 涡轮机是涡轮泵发射系统的核心组件, 为了研究系统各参数对涡轮机转子系统振动的影响, 运用拉格朗日方程, 考虑系统的陀螺效应、支撑刚度、支撑阻尼和系统的结构阻尼, 建立了涡轮机转子瞬态工作的运动微分方程, 并对方程进行了求解, 分析了不平衡质量、加速度等参数对转子振动的影响, 得出了这些参数对转子振动的影响规律。工程实践中应尽量降低不平衡质量和采用梯度加速度或正指数加速度以降低涡轮机的振动。文中的分析结果可为涡轮机转子的动力学设计提供参考。Abstract: Turbine is the core component of a turbo pump launching system. To reveal the effects of rotor system parameters on vibration of the turbine rotor system, the Lagrange equation is adopted to establish the differential equations of motion for the transient operation of the turbine rotor by considering the gyroscopic effect, support stiffness, support damp and structural damping of the system. The differential equations are solved, the effects of the parameters, such as unbalanced mass and acceleration, on rotor vibration are analyzed, hence the affecting rules of these parameters on rotor vibration are obtained. It is suggested that the unbalanced mass should be reduced as far as possible in engineering, and the gradient acceleration or positive exponential acceleration should be used to reduce vibration of the turbine. This study may provide a reference for the dynamics design of turbine rotor.
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Key words:
- turbine /
- rotor /
- vibration /
- transient operation /
- unbalanced mass /
- structural damping
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