Theoretical Study On Geared Linkage Mechanism Applied On The Speed-increaser Of Wind Turbine

At present, wind power growth device is mostly consisted of ordinary gear trains and planetary gear trains, which is complex and its transmission chain is relatively long. Because of high numbers of the meshing gear pairs, the device's mechanical efficiency is slightly low; In the high speed and heavy load situations, this kind of device go hot largely and its failure rate is very high. The design and key technology of most parts of domestic wind power generators still currently rely on foreign imports, and the localization degree of th is growth device is low. Therefore, it is urgent to develop and research a new wind power growth system independently to solve the technical problem of restricting the development of wind power.Based on the theoretical research of configuration, motion performance and dynamic performance, especially mechanical efficiency of geared linkage mechanism(GLM), the article expects to find a kind of GLM, which can especially suit wind power growth device. Meanwhile, we study the possibility of GLM used as the speed-increaser of wind turbine(TSWB), and build a perfect theoretical system that GLM is applied to TSWB, which can help us to explore a new method for the application of GLM.The main research contents and conclusions are as follows:Firstly, this paper analyzed transmission ratio and some other movement characteristics of GLM, and found the properties of two kind mechanisms of internal meshing type —— internal and external parallel moving gear mechanism, is better, which has bigger transmission ratio, more compact structure and better stable operation performance, so the article chose them as the primary type of TSWB; Meanwhile, in order to eliminate the influence of motion uncertainty of primary mechanism, we put forward the improving method of using tricyclic or polycyclic structure type;Secondly, the meshing efficiency of primary mechanism were analyzed and compared by meshing power method,and the results show that the meshing efficiency of external parallel moving gear mechanism is higher, so we selected it as the final type of TSWB; At the same time, we drew a conclusion that the overall efficiency of new wind power growth device can be up to 94.12%;Thirdly, the mechanics theoretical model of TSWB was established. Among it, the stress situation of the gear ring plate and three shafts(the input shaft, the output shaft and the supporting shaft) were analyzed in detail; Then, the balance performance was also analyzed, which satisfied the static balance, but wasn't enough to meet the dynamic balance, and the balance on the frame of its inertial moments needed to consider the influence of the actual conditions;Fourthly, the interference limited constrains and assembly conditions of gear transmission were analyzed. Then, according to the performance parameters of wind turbine, the main parts were designed and their strength were checked. Finally, this paper completed the structure design of the new type TSWB, which turned the theoretical achievements of the subject into reality.