（1.School of Mechanical Engineering, Hebei Institute of Architecture and Civil Engineering, Zhangjiakou 075000, China; 2.Beijing Qingyun Aviation Instrument Co., Ltd., Beijing 100086, China;3.School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China）


Abstract: Aiming at the problems of reliability and accuracy of the aviation throttle actuator, inorder to meet the requirement of precise control of aircraft engine opening, the transmission part of aircraft throttle actuator was studied, a doublelead worm gear pair was designed and applied to a certain type of electric throttle actuator. The working principle and related parameters of Archimedes duallead worm were analyzed. Aiming at the change of processing materials and methods of aviation doublelead worm, the accurate modeling method and process of Archimedes duallead worm was discussed, and its transmission application in throttle actuator was analyzed. The results indicate that the duallead worm and its precise modeling method are accurate，reliable，adjustable clearance, and it can be applied to the aviation actuator with high precision requirements, and provides a theoretical basis for the processing technology of products.
Key words: throttle actuator ;transmission precision; duallead worm; precise modeling; UG software