Pitch-varying system for synchronous variable-pitch wind generating set with protection function

Abstract

The invention relates to a pitch-varying system for a synchronous variable-pitch wind generating set with a protection function. The pitch-varying system comprises blades, a pitch-varying rocker mechanism, a pitch-varying pushrod and an electric pushrod, wherein the pitch-varying rocker mechanism is arranged in a wheel hub; the blades are fixed with the pitch-varying rocker mechanism; a power input end of the pitch-varying rocker mechanism is arranged at the end part of the pitch-varying pushrod; the electric pushrod is provided with a bracket support; the pitch-varying pushrod is fixed with the electric pushrod; a driving motor is connected with an pitch-varying electric control system; the electric pushrod is provided with an output shaft; a fan spindle is sleeved outside the pitch-varying pushrod; a gearbox hollow low-speed shaft is sleeved on the fan spindle; the front end of the fan spindle is fixed with the wheel hub; the rear end of the fan spindle is connected with the gearbox hollow low-speed shaft in an expanding manner; the gearbox hollow low-speed shaft is mounted in a speed-up gearbox; an output shaft of the speed-up gearbox is connected with a generator; a gear pair is mounted at the end of an output shaft of the electric pushrod; an input gear of the gear pair is fixed at the end part of an accessory shaft; a gear A is mounted at the other end of the accessory shaft; an electromagnetic clutch is arranged at the middle part of the accessory shaft; and a gear B engaged with the gear A is fixed on the gearbox hollow low-speed shaft.

Description

technical field [0001] The invention belongs to the technical field of wind power generating sets, and in particular relates to a synchronous pitch variable pitch system of wind power generating sets with protection function. Background technique [0002] The wind rotors of wind power generators mainly have two forms: fixed pitch and variable pitch. Due to the higher utilization rate of wind energy and better controllability of the wind rotors in the form of variable pitch, at present, large and medium-sized wind turbines at home and abroad often use three The form of blade synchronous pitch change, the commonly used three-blade synchronous pitch system includes blades, variable pitch bearings, rocker mechanism in the hub, electric or hydraulic push rod, variable pitch electronic control system and backup power supply of variable pitch electronic control system , when the pitch of the blades is changed, the pitch-variable electric push rod drives the rocker in the hub to mak...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects and deficiencies of the existing wind turbine pitch control system, the present invention provides a synchronous variable pitch wind turbine pitch control system with protection function to solve the problem of unit power failure, electronic control system failure, backup power supply, etc. The problem that the propeller retraction cannot be completed in the case of failure

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