Horizontal shaft wind turbine blade self-adaptive elastic variable pitch device

Abstract

The invention discloses a horizontal shaft wind turbine blade self-adaptive elastic variable pitch device. The horizontal shaft wind turbine blade self-adaptive elastic variable pitch device comprisesa flange plate and draught fan blades; a guiding sleeve is fixed to the flange plate; a sleeve cavity matched with the guiding sleeve in a sleeved manner is machined for the draught fan blades whichare provided with a flange block; a spring damper for applying proper pre-tightening force to the draught fan blades when the inflow air speed of a wind turbine is smaller than the rated air speed isarranged in the guiding sleeve; the front end of the spring damper is fixedly connected with the flange block; the rear end of the spring damper is fixed to the flange plate; an inverted-T-shaped reversing track is arranged on the peripheral face of the guiding sleeve; a U-shaped reversing track groove matched with the inverted-T-shaped reversing track is formed in the sleeve cavity; and the draught fan blades overcome the pre-tightening force of the spring damper to complete the variable pitch action of the draught fan blades along guiding reversing of the inverted-T-shaped reversing track bymeans of the centrifugal force generated due to high-speed rotating and the pneumatic reversing torque generated on the draught fan blades by gas flow when the inflow air speed of the wind turbine islarger than the rated air speed.

Description

Technical field [0001] The invention belongs to the technical field of wind power generators, and in particular relates to a variable pitch device applied to a wind turbine to enable the wind turbine blade to generate adaptive pitch according to the wind, in particular to a horizontal axis wind turbine blade adaptive elastic pitch change Device. Background technique [0002] Wind power is a clean and pollution-free renewable energy with huge reserves and broad development prospects. It is an important part of future energy. Horizontal axis wind turbines are currently the main form of wind energy development for wind energy development due to their higher wind energy utilization efficiency, low power generation cost and excellent mechanical quality, and are widely recognized in business. [0003] Horizontal axis wind turbines are divided into two types: fixed pitch and variable pitch. The essential difference between the two is that their respective power control strategies are di...

AI Technical Summary

Problems solved by technology

The structure of the electric pitch system is very complicated, the cost is high, the space is large, and the maintenance cost is high

Therefore, the complex electric pitch system will greatly increase the manufacturing cost of small wind turbines and reduce the reliability of the whole machine

It can be seen that the variable pitch wind turbine can greatly improve the wind energy extraction efficiency of the wind turbine, but this electric pitch system used on large wind turbines is not suitable for small wind turbines, so if we can develop a suitable The new pitch device for small wind turbines will definitely have broad market application prospects

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