Study on the clearance modification of rotors for twin-screw compressor

• Main Authors: Qin-shun Xu, 許欽舜
• Other Authors: Zhan-hua Fong
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/46320385080574611293

碩士 === 國立中正大學 === 機械工程所 === 95 === Interference and abnormal wear are most common failures for the twin screw compressor. These failures are often caused by thermal expansion, hydrodynamic effects, and assembly errors. Reasonable clearance between meshing rotors is required to avoid such interference and abnormal wear. A feasible rotor profile modification is proposed in this thesis to provide reasonable clearance between rotors considering assembly errors. A numerical method is developed to calculate the interference due to assembly error. Based on these interference values, the rotor surfaces can thus be modified in accordance to several correction methods. Finally, the gap between two rotors under the given conditions can ensure be positive values by the repeat interference. Therefore, the design procedure and inclusive methods in this thesis are useful and general for the clearance distribution of rotors of twin-screw compressors.