Pitch adjusting system of rotation type hydraulic proportional servo drive motor

Abstract

The invention discloses a pitch adjusting system of a rotation type hydraulic proportional servo drive motor, relating to the technical field of wind power generation and aiming to solve the technical problems of high cost and failure rates. The pitch adjusting system comprises a wind wheel with paddles, a generator set, a pitch adjusting controller, a pitch adjusting executing unit and a detecting unit, wherein the pitch adjusting controller is used for controlling the pitch adjusting executing unit to run, the pitch adjusting executing unit is used for controlling the pitch angle change of the wind wheel, the wind wheel is connected with the generator set and is used for driving the generator set to work, and the detecting unit is used for detecting the pitch angle of the wind wheel andthe power of the generator set and transmitting feedback signals to the pitch adjusting controller. The pitch adjusting system is characterized in that the pitch adjusting executing unit comprises a rotation type hydraulic cylinder and a control loop of the rotation type hydraulic cylinder; and the rotation type hydraulic cylinder comprises a cylinder body, end caps at both ends of the cylinder body as well as two stator and one rotor in the cylinder body, and the paddles of the wind wheel are connected with a rotating shaft of the rotor. The pitch adjusting system provided in the invention has the advantages of low cost and failure rate and can be started to generate power at any time.

Description

technical field [0001] The present invention relates to the technology of wind power generation, in particular to a technology for controlling the pitch control system of a rotary hydraulic proportional servo drive motor of a wind wheel. Background technique [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world, and the application of wind power generation equipment is also becoming more and more extensive. Wind power generation equipment includes wind rotors and generator sets. The wind rotors are composed of blades and rotor shafts. The wind energy drives the generator sets to generate electricity through the blades and rotor shafts. Since the speed of the wind rotors changes with the wind speed, wind power generation The equipment is equipped with a speed regulating system to control the absorption of wind energy by the wind wheel. [0003] The current wind rotor speed regulation adopts the variable pi...

AI Technical Summary

Problems solved by technology

[0005] The pitch execution unit in the electric pitch control system is composed of a motor, a pitch gearbox and a battery. The cost of this execution unit is relatively high, and the generator set cannot start power generation at any time (that is, quick start after emergency shutdown), and it needs to wait The battery can only be started after charging, the response speed of the system is also slow, and there is a hidden danger of overspeeding of the wind wheel, which makes the generator set have a potential risk of overloading

[0006] The pitch actuator unit of the linear hydraulic cylinder (double cylinder) variable pitch system is a linear hydraulic cylinder (double cylinder) and its control circuit. This actuator unit has large transmission torque, high rigidity, accurate positioning, and fast dynamic response. and other advantages; but because there are many components in the control circuit, the control circuit is very complicated, and the volume is also large, so the failure rate is high and the maintenance is extremely inconvenient

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