Automatic blade-changing speed-regulating device based on wind speed

Abstract

The invention provides an automatic variable-pitch speed regulating device based on an air speed, which is formed by a variable mounting angle mechanism and a variable inclined angle mechanism. A blade mounting plate is fixedly connected with an outer step of a sleeve of the variable mounting angle mechanism and a mandrel is mounted at the upper end of the sleeve through a radial bearing; the mandrel is positioned by a positioning screw at the lower end; the mandrel is connected with the sleeve through a torsional spring; the lower end of the mandrel is fixedly connected with a positioning rod on a machine shell and is connected with the variable inclined angle mechanism through a connecting rod; a spline transmission shaft of the variable inclined angle mechanism is slidingly connected with a rotary table; an axial bearing is mounted at the front end of the rotary table; the axial bearing is connected with the machine shell through a compression spring; the back end of the rotary table is connected with the connecting rod. Under the effect of wind power, an automatic variable pitch blade mounting angle is realizing by the torsional spring and a rotary mechanism, and an automatic variable pitch blade inclined angle is realized by using the compression spring and a connecting rod mechanism. According to the device, the structure is simpler, the installation is convenient, other auxiliary energy sources and counter weight mechanisms are not needed and the function can be automatically realized according to the size of the wind power.

Description

technical field [0001] The invention relates to a pitch-variable speed-regulating device, in particular to an automatic pitch-variable speed-regulating device based on wind speed. Background technique [0002] The pitch speed regulating device is a device used in wind turbines to automatically adjust the speed of wind turbines within a certain wind speed range. During the working process of the wind energy machine, in order to ensure that the output voltage of the generator can only fluctuate within a small range, a pitch control device can be used. By changing the installation angle and inclination angle of the blades to change the speed of the wind turbine so as to limit a small wind speed fluctuation range, the output voltage of the generator can be kept at a stable value within the allowable range. The commonly used pitch speed control devices include motor-driven pitch systems, hydraulically driven pitch systems, and mechanical pitch devices with additional mass. The ...

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Problems solved by technology

The structures of the above mechanisms are complex and some of them need auxiliary energy.

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