Pulp distance varying mechanism of wind power generator

Abstract

The invention discloses a variable-pitch mechanism for an aerogenerator, which comprises a wheel hub, a power component, a plurality of variable-pitch bearings, wherein the wheel hub consists of a curved surface formed by the axes around the wheel hub, a front cover and a back cover which are vertical to the axes of the wheel hub; the outer circle of the variable-pitch bearing is fixedly connected with the curve surface of the wheel hub, and the variable-pitch bearing is evenly distributed on the curve surface of the wheel hub. The device also comprises a screw-driven component, a synchronous mounting rack, a connecting piece and a rotating component, wherein the screw-driven component is rotationally matched with central holes of the front cover and the back cover, and the screw-driven component is connected with the power component; the screw-driven component is fixedly connected with the synchronous mounting rack; the synchronous mounting rack is rotationally connected with each connecting piece, each connecting piece is evenly distributed on the circumference taking the center of the synchronous mounting rack as circle center, and circumference plane is vertical to the axes of the wheel hub; and the connecting piece is also rotationally connected with the rotating component, and the rotating component is fixedly connected with the inner circle of the variable-pitch bearing.

Description

technical field [0001] The invention relates to a wind power generator, in particular to a pitch variable pitch mechanism of the wind power generator. Background technique [0002] The pitch mechanism of the existing wind power generator generally adopts the hydraulic pitch mechanism or the motor independent pitch mechanism. The hydraulic pitch mechanism has a slow response speed, complex structure, and high manufacturing and maintenance costs. Because hydraulic oil is used as the medium for power transmission, the environmental adaptability is poor. For example, in a low-temperature environment, the hydraulic oil is easily frozen and Make described hydraulic pressure variable pitch mechanism paralyzed, if start forcibly, wind turbine has the risk of being damaged. The motor independent pitch change mechanism means that the pitch change of each blade of the wind power generator is realized by an independent motor driving the corresponding reduction box. The structure of the...

AI Technical Summary

Problems solved by technology

The hydraulic pitch mechanism has a slow response speed, complex structure, and high manufacturing and maintenance costs. Because hydraulic oil is used as the medium for power transmission, the environmental adaptability is poor. For example, in a low-temperature environment, the hydraulic oil is easily frozen and Make the hydraulic pitch mechanism paralyzed, if forced to start, the wind turbine has the risk of being damaged

The motor independent pitch change mechanism means that the pitch change of each blade of the wind power generator is realized by an independent motor driving the corresponding reduction box. The structure of the motor independent pitch change mechanism is complicated, and the manufacturing and maintenance costs High, in fact, due to the manufacturing differences of the motor and the gearbox itself, it is very difficult to ensure that the pitch angle of each blade is consistent during the pitch change process, although the wind turbine can be accurately debugged at the initial stage of installation However, after a period of time, because the motor independent pitch mechanism has many parts and the connection relationship is complicated, the error accumulation between the parts after wear and tear is enlarged, so the motor independent pitch mechanism can no longer be used in variable pitch. Keep the pitch angle of each blade consistent during the pitch process

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