Pitch changing and periodical pitch changing device of downwind wind driven generator

Abstract

The invention relates to a pitch changing and periodical pitch changing device of a downwind wind driven generator, which changes the pitch through a wind speed rudder and changes the pitch periodically. One end of a pitch changing main shaft passes through a generator and a main shaft of a fan and is fixedly arranged on an outer frame of the wind driven generator, while the other end of the pitch changing main shaft passes through a hub to form a certain included angle with a pitch changing and periodical pitch changing slide rail. The pitch changing and periodical pitch changing slide rail is provided with a fixed disc sliding in a reciprocating manner and an inclined disc. The inclined disc is movably installed on the fixed disc and rotates on the fixed disc. One end of a pitch changing connecting rod is movably connected with the inclined disc while the other end of the pitch changing connecting rod is connected with an eccentric shaft at the root of a blade. The fixed disc is connected with a reciprocating pitch changing movement mechanism through the pitch changing connecting rod. The device provided by the invention is rapid in pitch changing, strong in anti-gust capacity, and simple in structure. As the self energy of the device is not consumed to wind and pitch changing, the annual average generating capacity is high, and the period of return on investment can be shortened.

Description

technical field [0001] The present invention relates to a wind-driven generator, in particular to a pitch-changing and periodic pitch-changing device for a downwind wind-driven generator that uses a wind speed rudder to change the pitch and can periodically change the pitch. Background technique [0002] Wind power is an inexhaustible source of clean energy, and the megawatt-level has been perfected, but the structure of small and medium-sized ones is relatively complicated, the manufacturing cost is high, and the stability is poor, so it is difficult to popularize. The main reason for the high cost is that the wind-facing part and the pitch-changing part are relatively complicated, and these two parts are also prone to failure. Although there is a kind of centrifugal pitch wind turbine, although the technology is mature, it needs a relatively high speed to provide centrifugal pitch force, so it is not suitable for making it bigger, and the high speed is harmful to birds and...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the above-mentioned prior art, and provides a pitch change and periodic pitch change device for downwind wind power generators, which solves the problem that the entire wind power generator vibrates due to the tower shadow effect

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