Fan linkage pitch system

Abstract

The invention relates to a fan linkage pitch system, which is applied to the manual and power-driven linkage pitching for a fan. The fan linkage pitch system comprises a blade group and a pitch system which is connected with a machine head hub, and has the advantages of simple structure, low cost, excellent stability and high linkage precision. A main control system signal of the fan is used for instructing a power-driven tension system to control a blade pitching angle, and the active pitching of a blade is realized; and by the adoption of the multi-free-degree rotation of a joint bearing, the highly precise coordination of the waist hole of a linkage disc and the outer circle of the joint bearing, and the movement capability of the joint bearing in the waist hole, the high synchronization among blades of an impeller during the pitching of blades is achieved, and the problem that non-synchronization of pitching caused by non-uniform pitching force of the blades due to wind shearing, down-wind tower shadow effect and the like is solved. According to synchronized pitching and timely active pitching, the operation stability of a set is effectively improved, electricity generation is improved, the service life of the set is prolonged, and the operation safety of the set is guaranteed.

Description

technical field [0001] The patent of the present invention relates to a wind turbine linkage variable pitch system, that is, a manual and electric linkage system of a wind power generator. Background technique [0002] As a renewable, green and environmentally friendly energy, wind energy is one of the main new energy sources that my country and other countries in the world will develop at present and in the future. Due to the special working conditions such as wind speed, wind direction instability and storm in nature, it is necessary to control the fan. In order to improve the utilization rate of wind energy and protect the fan under special working conditions. [0003] All components of the pitch system of the wind turbine (hereinafter referred to as the fan) are installed on the hub. During normal operation of the fan, all parts rotate with the hub at a certain speed. The pitch system controls the speed of the wind rotor by controlling the angle of the blades, thereby...

AI Technical Summary

Problems solved by technology

With this structure, several pitch drive systems are installed in the hub of the nose, which increases the volume of the hub of the nose, increases the weight of the nose, increases the moment of inertia of the impeller, complicates the control system, and increases maintenance costs.

Especially for small and medium-sized wind turbines, the mechanism of the electric pitch control system is complicated, its manufacture and installation are difficult, there are many faults, and the relative cost is relatively high

[0007] However, small wind turbines generally adopt fixed-pitch blade stall control technology and yaw control technology. Due to the influence of bad weather, there are disadvantages such as unstable power control, low power generation efficiency, poor safety, and short fan life. Even if the small and medium-sized wind turbine adopts the linkage pitch control technology, it generally adopts gear linkage, which has a complicated structure and low precision

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