Design And Research On Gearbox For MW Wind Turbine

The rapid development of wind power industry lead to the prosperity of wind power equipment manufacturing industry.As the core component of wind turbine, the gearbox is received much concern from related industries and research institution both at home and abroad.However,due to the domestic research of gearbox for wind turbine starts late,technology is weak,especially in the gearbox for MW wind turbine, which mainly relied on the introduction of foreign technology.Therefore,it is urgent need to carry out independent development and research on MW wind power gearbox, and truly master the design and manufacturing technology in order to achieve the goal of localization.This paper takes the wind power as object,which is imported by CSR Zhuzhou Electric Locomotive Research Institute Co.,Ltd.The independent design of the gearbox matching for the wind turbine has been carried out by selecting the transmission scheme and calculating the gear parameters,and the modification design of involute helical gear is realized by finite element contact analysis on gear transmission.Firstly,the mechanical structure of gearbox is determined.The two-stage derivation planetary transmission scheme is selected.The gear parameters of every stage transmission is calculated.,and the force analysis results is obtained.The static strength check of tooth surface contact is implemented according to related standard.The result shows that it is accord with safety requirements.Secondly,the helical gear parametric model is established based on involute curve equation and generation theory of spiral line by using the function of parametric modeling in Pro/E.The connection between ANSYS and Pro/E is realized by configuring interface.Then,the tooth surface contact stress of the gear transmission is calculated.Contact stress is analyzed adopting theory algorithm and finite element analysis respectively. The result shows they are anastomosing,which means that the accurate result can be gained with the reasonable finite element method.Proper and reasonable parameters are obtained by influence analysis of contact parameter on finite element contact.Finally,this paper presents the scheme of tooth profile and helix angle modification based on the principle of tooth modification.The scheme is reasonable by contrasting with the contact stress before and after modification.