An Electro-Hydraulic Actuator for the TVC of a Throttlable Kerolox Rocket Engine

• 作者: LIU Hong CHEN Keqin LAN Tian WANG Yuhao ZHAO Yingxin ZHAO Shoujun
• 来源期刊: 中国航天（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: NEW GENERATION MEDIUM-LIFT LAUNCH VEHICLE—LM-8
• 页码范围: 53-58
• 页数: 6页
• 语种: 英文
• DOI: 10.3969/j.issn.1671-0940.2021.02.007

摘要

An electro-hydraulic actuator for the thrust vector control(TVC)of a throttlable kerolox rocket engine is introduced in this paper.The creative feature is an integrated hydraulic power drive unit,where a constant speed kerosene motor is used to draw high pressure kerosene from the engine and to drive a constant pressure variable displacement piston pump,acting as the power supply for the actuator.Its operational mechanism,to accommodate the varying pressure from the turbo-pump of a throttling engine,lies in a pressure-reducing flow regulator inserted at the motor inlet.Another key point is that the displacement of the motor is reasonably bigger than the pump so that a sufficiently wide range of pressures can be adapted.Modeling analysis and flight test results were well matched,which show the outstanding performance of this novel type actuator.