Axial Force and Strength Analysis of a Non-oil Twin Screw Air Compressor Driving Gears

• Main Author: 郭曜億
• Other Authors: 劉永生
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/00361284410086674015

碩士 === 逢甲大學 === 機械與電腦輔助工程學系 === 103 === The main content of this thesis is to analyze axial force and strength of the synchronous gears for driving a non-oil twin screws air compressor. The air pressure applied on the screw rotors has been estimated. This distributed pressure forces are employed to calculate the axial thrust of the screw rotors by using dynamic analysis software ADAMS. The object is to design a pair of helical synchronous gears to drive the screw rotors and generate opposite axial thrust force to balance the axial thrust from screw rotors. Helical gears of modulus 1.5 with 24 degrees helix angle and modulus 1.75 with 20 degrees helix angle are compared in this paper. Finally the strength of the helical gears are analyzed by finite element analysis software ABAQUS. The results show that bending fatigue failure at root fillet of gear teeth and surface fatigue failure caused by cyclic Hertz contact stress are two factors most likely to govern the design.