Three-guiding-rod synchronous variable pitch device and assembling method thereof

Abstract

The invention provides a three-guiding-rod synchronous variable pitch device and an assembling method thereof. The three-guiding-rod synchronous variable pitch device is characterized in that a bladerotary bearing is included; the outer circle of the blade rotary bearing is connected with a blade, and the inner circle of the blade rotary bearing is connected with a hub; the outer circle of the blade rotary bearing is connected with a synchronous disc through a connecting rod; and three guiding sleeves are arranged on the synchronous disc, three parallelly-arranged guiding rods are arranged inthe three guiding sleeves correspondingly, and the synchronous disc can move front and back along the guiding rods. By changing the mounting mode of the rotary bearing, a set of brand new transmission structure is designed, thus the size of the hub is decreased by 20%, the blade mounting precision is improved, and a blade transferring flange with the high manufacturing requirements and cost is omitted; and a front guiding rod mounting seat and a rear guiding rod mounting seat are separated from the hub, thus the front guiding rod seat and the rear guiding rod seat are machined together, and the accuracy of a guiding mechanism of the synchronous disc is guaranteed.

Description

technical field [0001] The invention can be applied to the pitch angle adjustment mechanism of the impellers of wind power generators and hydraulic power generators, and its main functions are positioned as safety protection and power adjustment. Background technique [0002] At present, in the field of pitch design and structure of small and medium-sized wind turbines, the three-blade synchronous pitch technology is widely used due to its low cost and simple control. The synchronous pitch structure generally uses a drive motor to simultaneously drive multiple blades to change the pitch. The pitch speed and angle of each blade are kept consistent, and there is no need to independently control a single blade. The specific motion conversion process is as follows: the rotary motion of the driving motor is converted into linear motion through the ball screw, and the linear motion of the screw nut is connected to the pitch connecting rod of each blade through the mechanism to pul...

AI Technical Summary

Problems solved by technology

[0004] 1. The blade is installed on the inner ring of the slewing bearing, resulting in a large volume of the hub, and the connecting flange between the inner ring and the blade has a very high production requirement due to its small diameter;

[0005] 2. The processing technology of the multi-guide rods of the synchronous disk is very demanding, and it is very easy to cause the multi-guide rods to be non-parallel and cause the operation to be stuck;

[0006] 3. During the rotation of the wind wheel, since the outer ring of the conversion bearing still has a certain friction force against the inner ring, it may cause the screw nut to follow the rotation, resulting in unexpected changes in the blade angle

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