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Wind impeller hybrid pitch technology

A pitch and blade technology, applied in the fields of semi-pitch blades, control of semi-pitch blades, and hybrid pitch impellers, can solve problems such as large volume and weight of blades, inability of blades to rotate each other, and difficulty in pitch implementation. , to achieve the effect of reducing cost and reducing pitch load

Active Publication Date: 2015-10-07
BEIJING SANLI XINNENG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The common thing in modern technology is the variable pitch technology. Whether it is the existing integral blade, or the newly proposed segmented blade or telescopic blade, the segments of the blade cannot rotate with each other. Propellers; due to the large volume and weight of the blades, the implementation of pitch changes is becoming more and more difficult

Method used

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  • Wind impeller hybrid pitch technology
  • Wind impeller hybrid pitch technology
  • Wind impeller hybrid pitch technology

Examples

Experimental program
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Embodiment Construction

[0033] There are many ways to drive the pitch of modern blades, and the most commonly used ones include gear transmission, belt transmission, hydraulic transmission, etc. This specific implementation mode uses gear transmission as an example.

[0034] See attached figure 1 And attached figure 2 , three semi-pitch blades 11 are installed on the hub 12, the hub 12 is connected to the nacelle 13 through the low-speed shaft, and the nacelle 13 is installed on the top of the tower 14.

[0035] See attached image 3 , attached Figure 4 , attached Figure 5 And attached Figure 6 , the lower part of the blade 7 is fixedly installed on the hub 12, that is, it is installed with a fixed pitch, the shroud 16 is fixedly connected with the shell of the semi-variable pitch blade 11 and is smoothly transitioned and sealed, and the upper part of the blade 1 includes the bolt 4 and the pitch drive device The connecting device of 5 is installed on the top of blade bottom 7, promptly adop...

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PUM

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Abstract

The invention discloses a semi-variable-pitch blade. The blade structurally comprises a blade upper part and a blade lower part, wherein the blade upper part is mounted in a variable-pitch manner; the blade lower part is mounted in a fixed-pitch manner; and the blade upper part and the blade lower part are connected through a connecting device. The invention further discloses a mixed-pitch impeller equipped with the semi-variable-pitch blade and a control method of the semi-variable-pitch blade. As the semi-variable-pitch blade is adopted, the variable pitch load is reduced, the design and the production of the blade are simple and feasible, and the cost is lowered accordingly. Through application of the semi-variable-pitch blade control method, the pitch angle I is accurately controlled, and accordingly, the wind energy absorption, power control, pneumatic braking and other functions of the impeller are completed.

Description

technical field [0001] The invention relates to a wind power generating device, in particular to a half-pitch blade. The invention also relates to a mixed pitch impeller fitted with half variable pitch blades. In addition, the present invention also relates to a control method for half-pitch blades. Background technique [0002] The impeller is the energy extraction device of wind power equipment. Whether it is wind power generation, wind water pumping or wind power hydrogen production, the energy is obtained by the impeller from wind energy; as the capacity of wind power equipment continues to increase, the diameter of the impeller is also increasing , the length of the blades is increasing; correspondingly, the volume and weight of the blades are increasing; the transportation and installation of the blades are becoming increasingly difficult. Vestad's 7MW wind turbine has a blade length of more than 80 meters, a weight of more than 20 tons, and a diameter of nearly 3 me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D1/06F03D7/04
CPCY02E10/721Y02E10/723Y02E10/72Y02P70/50
Inventor 欧振玉
Owner BEIJING SANLI XINNENG SCI & TECH