大功率、高转速、高扬程涡轮泵振动分析与减振研究  

Analysis of vibration and vibration reduction for turbopumps with high-power, high-rotation speed and high-delivery-head

作　　者：黄智勇[1] 胡钟兵[1] 李惠敏[1] 

机构地区：[1]陕西动力机械设计研究所,陕西西安710100

出　　处：《火箭推进》2005年第6期1-6,共6页Journal of Rocket Propulsion

摘　　要：比功率和能量密度都很高的火箭发动机涡轮泵,工作时引起振动的基本原因之一是较大的损失功作用在质量较小的产品上,减振必须是以提高组件的效率降低其振动比载荷为首选措施,同时改变其刚度与强度。组件中动、静件叶片之间的能量转换是引起流体压力脉动的主要原因,避免压力脉动的频率与转子转动的倍频耦合,特别是较低的倍频,是降低产品耦合振动的关键。流体密封间隙内的激振力对产品振动的影响很复杂,但激振力的主频与转子的某一固有频率接近时,将会对转子激起很大的振动,改变密封间隙内流体激振力的频率是抑制流—固耦合振动的主要方向。The power and efficiency of turbopump in rocket engine is very high. The essence factor of stirring vibration is that the greater loss power works on the low mass parts. The method of reducing vibration is improving efficiency of the subassembly, decreasing its vibration specific load, and changing the rigidity and strength at the same time. The process of energy transformation between blades of the runner and the stator cause pressure oscillation. To avoid frequency coupling between pressure oscillation and rotation speed multiple frequency, especially lower multiple-frequency coupling, the key is to reducing coupling resonances. Vibration of parts affected by induced-vibration in the clearance of liquid seals is very complicated. When the main-frequency of induced-vibration is close to a certain natural-frequency of the rotor, it induces very big rotor vibration. Thus changing the frequency of fluid-induced vibration in seal is the main direction to bate fluid-solid coupling vibration.

关 键 词：涡轮泵 振动 分析 措施 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]