Tandem type self-locking electromechanical servo mechanism

Abstract

A tandem type self-locking electromechanical servo mechanism adopts tandem type layout and comprises a front supporting lug, an actuator assembly, a self-locking module, a servo motor and a rear supporting lug which are coaxially arranged from front to back in sequence; the front supporting lug is connected with the actuator assembly through a thread arranged on the front supporting lug, and the actuator assembly, the self-locking module, the servo motor and the rear supporting lug are coaxially connected in series through screws; and the servo motor receives a driving signal and outputs variable-direction and variable-rotating-speed rotating motion, the actuator assembly converts the rotating motion into linear motion and measures displacement parameters, and the self-locking module locksa motor shaft of the servo motor in a power-off state to achieve locking of the output position of the servo mechanism.

Description

technical field [0001] The invention relates to a serial self-locking electromechanical servo mechanism, which is used for thrust vector control of liquid hydrogen and liquid oxygen engines of launch vehicles. Background technique [0002] The servo mechanism is an important device or system of the launch vehicle, which is used to realize the thrust vector control of each sub-stage. Most domestic and foreign launch vehicles use electro-hydraulic servo mechanisms with servo valves as the core. The first, second, and third sub-stages of my country's current main rocket, the Long March 3A series, all use electro-hydraulic servo mechanisms, and the third sub-stage integrates a hydraulic locking mechanism to realize the swing of the first and second flight sections and the third-stage gliding section. Engine lock function. With the increasing demand for high-density launches in the commercial aerospace market and the intensification of market competition, new launch vehicles foc...

AI Technical Summary

Problems solved by technology

The third stage of my country's Long March 6 rocket, which flew for the first time in September 2015, uses electromechanical servo mechanisms, but the thrust of the engine is small, and the power of the servo mechanisms is low, only tens of watts, which is relatively easy to implement in design

The American Centaur Liquid Hydrogen Liquid Oxygen upper stage single-engine configuration adopts electromechanical servo mechanism, but there is no level test and use report

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