Drilling equipment for stator case of large wind generator

ZHANG Jian-xin, LI Long-quan, SHEN Jun-teng, ZHAO Xin
(Basic Experimental Training Centre, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China）

Abstract: Aiming at the positioning hole processing of large wind power generator stator case, the drilling equipment for stator case was designed. Based on the structural characteristics of stator case, the rotary positioning platform was designed by 3D modeling technology. Studying the location and processing technology of positioning holes, three-axis horizontal drilling equipment was designed. Based on the research of structure and stress, the key structural parts and their deformation direction which have the greatest influence on machining accuracy were analyzed. Analysing the structural stiffness and processing precision, the positioning and locking mechanism of lifting platform was designed by finite element method. The results indicate that the rotary positioning platform can realize the drilling of four processing surfaces in one time clamping, the three-axis horizontal drilling equipment can realize the processing of all holes with high precision. The experiment show that this drilling equipment can improve the efficiency and precision of drilling processing remarkably.
Key words: stator case; three-axis horizontal drilling equipment; finite element analysis（FEA）; stiffness analysis