Support lug of servo actuator adapting to axisymmetric swinging nozzle

Abstract

The invention belongs to a support lug structure of an electromechanical servo actuator adapting to an axisymmetric swinging nozzle and particularly relates to the support lug structure of a servo actuator adapting to the axisymmetric swinging nozzle. In the support lug of the servo actuator adapting to the axisymmetric swinging nozzle, a shaft sleeve of the support lug and an ear sleeve of a universal joint pin are respectively pressed and arranged in the support lug of the servo actuator and a pin hole of the universal joint pin; the support lug of the servo actuator is divided into two halves; and the universal joint pin is arranged in a shaft sleeve hole of the support lug of the servo actuator. The support lug structure has the advantages of simple structure and convenience in installation; the support lug structure of the servo actuator realizes the swinging in pitching and yawing directions needed by the electromechanical servo actuator only by using the universal joint pin as a transmission middle element and can be connected with the actuator and a flange of the engine by only two screws in a fastening manner; and the support lug structure limits the bidirectional swinging of the electromechanical servo actuator around the per se axis under the action of positive and negative output torque and greatly increases the capability of torque transmission of the actuator and the controlling accuracy and the stability of a servo system.

Description

technical field [0001] The invention belongs to a lug structure of an electromechanical actuator adaptable to full-axis swing nozzles, in particular to a lug structure adaptable to full-axis swing nozzle servo actuators. Background technique [0002] The electromechanical actuator used for the thrust vector control of the full-axis swing nozzle adopts the scheme of joint bearings at both ends. This scheme has been widely used in the previous supporting hydraulic servo mechanism, but the disadvantage of this scheme is that the servo mechanism rotates around its axis. The degree of freedom is not constrained in a small angle range, and it is used for electromechanical servo-flexible nozzle thrust vector control, which will make the electromechanical servo mechanism swing around its own axis in both directions under the action of positive and negative output torque, without torque transmission capability, which will affect the servo motor. System control accuracy and stability....

AI Technical Summary

Problems solved by technology

[0002] The electromechanical actuator used for the thrust vector control of the full-axis swing nozzle adopts the scheme of joint bearings at both ends. This scheme has been widely used in the previous supporting hydraulic servo mechanism, but the disadvantage of this scheme is that the servo mechanism rotates around its axis. The degree of freedom is not constrained in a small angle range, and it is used for electromechanical servo-flexible nozzle thrust vector control, which will make the electromechanical servo mechanism swing around its own axis in both directions under the action of positive and negative output torque, without torque transmission capability, which will affect the servo motor. System control accuracy and stability

In the past, in order to ensure the torsion resistance of the electromechanical servo mechanism, the joint bearing and the anti-roll rubber bushing were generally used, or the joint bearing with the upper lug of the nozzle was used. The former scheme restricted the The degree of freedom of the electromechanical servo mechanism to rotate around its own axis, but this mechanism makes the joint bearing only have one degree of freedom to rotate around its own axis, which still cannot meet the requirements of the full-axis swing of the nozzle. Gaps will be introduced due to structural fit problems, resulting in system errors

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