The connection structure of the main shaft and the speed-increasing gearbox of the wind turbine and its optimization design method

Abstract

The invention discloses a connecting structure for a spindle and a step-up gear box of a wind turbine generator and an optimization design method of the connecting structure. In the connecting structure, an end flange of the spindle is of an inner cone structure with the inner diameters gradually reduced from outside to inside, and the end of an input shaft of the step-up gear box is of a conic structure matched with the inner cone structure. The large diameter of the end flange is 97%-99% of the large diameter of the end of the input shaft, the small diameter of the end flange is 97%-99% of the small diameter of the end of the input shaft, and the conic face angles and lengths of the end flange and the end of the input shaft are the same. After the end flange is inserted into the end of the input shaft, the end flange and the end of the input shaft are fastened through bolts. According to the connecting structure for the spindle and the step-up gear box of the wind turbine generator and the optimization design method of the connecting structure, the friction force of the contact face is large, the number of the bolts needed during fastening is reduced, mounting difficulty and unitdesign difficulty are reduced, the design optimization efficiency of the unit is improved, and the torque transmission effect is guaranteed.

Description

technical field [0001] The invention relates to the technical field of wind power generation equipment, in particular to a connection structure between a main shaft and a speed-increasing gearbox of a wind power unit and an optimization design method thereof. Background technique [0002] With the increasing energy consumption and the increasing demand for environmental protection, the development of renewable new energy is getting more and more attention. Among them, wind power is one of the fastest growing new energy sources, and the design of wind turbines has become a crucial technology in the wind energy industry. . In wind turbines with step-up gearboxes, the main shaft needs to transmit torque to the step-up gearbox. A reliable connection without gaps is required between the two, usually in the form of a shrink disc or a flange. Shrink disks are usually used in smaller megawatt wind turbines, and flange connections are used to further shorten the length of the trans...

AI Technical Summary

Problems solved by technology

The current flange connections are all flat flange connections, and the torque transmission is mainly realized by the static friction force provided by the bolt pre-tightening force to compress the flange surface, but with the increase of rated power and the lengthening of blades, the torque is often very large , Relying on the friction force of the plane flange to transmit torque requires a lot of bolts, and the structure needs to be enlarged to a certain extent. However, due to the space constraints such as the diameter of the main shaft, the bolt arrangement becomes difficult, which brings great difficulties to the enlargement of the unit. limit

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