Unlock instant, AI-driven research and patent intelligence for your innovation.

Wind turbine impeller and wind turbine

A technology for wind turbines and impellers, applied in wind turbine combinations, wind turbines, wind energy power generation, etc., can solve problems such as increasing the cost and complexity of the pitch system, reducing the reliability of the pitch drive device, and the wear of the pitch drive gears. , to achieve smooth transmission, improved reliability and service life, and reduced load fluctuations

Active Publication Date: 2017-11-07
XINJIANG GOLDWIND SCI & TECH CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the variability of the natural environment and the complexity of the operating state of the wind turbine, the independent pitch control system and control method need to be customized according to the specific environment and state. At the same time, to achieve independent pitch generally requires adding a set of highly reliable load measurement system, which will inevitably greatly increase the cost and complexity of the pitch system
In addition, independent pitch adjustment requires frequent actions of the pitch drive device, which will cause frequent wear of the pitch drive gear and reduce the reliability of the pitch drive device
[0006] In fact, it is precisely because of the above-mentioned many shortcomings of the independent pitch control system and method that it has not been popularized. Modern wind turbines still generally use a simple unified pitch control system and method.
However, as the power of wind turbines continues to increase, especially the impeller diameters of mainstream wind turbines have reached or exceeded 100 meters, which makes the force imbalance between the blade units of the impeller more prominent. The service life and reliability of the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wind turbine impeller and wind turbine
  • Wind turbine impeller and wind turbine
  • Wind turbine impeller and wind turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like figure 1 As shown, the impeller of the wind power generating set according to Embodiment 1 of the present invention includes a central coupling 1 (for example figure 1 The hub 11 shown in ), the blade unit 2 is connected to the central coupling 1, the blade unit 2 includes a blade support 21, and the blade 23 is connected to the blade support 21 through a pitch bearing 22, and the blade support 21 is flexible Connected to the central coupling 1, the blade supports 21 of every two adjacent blade units 2 pass through at least one (for example figure 1 Shown in is a) elastic coupling 3 connection.

[0040] The impeller of the wind power generating set provided in this embodiment provides a new technical concept to reduce fatigue load and vibration, the blade support 21 of the blade unit 2 is flexibly connected with the central coupling 1, and the elastic coupling 3 will The blade supports 21 of every two adjacent blade units 2 are connected, so that each blade unit ...

Embodiment 2

[0053] like Figure 7 and Figure 8 As shown, the difference between the impeller of the wind power generating set in Embodiment 2 of the present invention and the impeller of the wind generating set in Embodiment 1 lies in the way of flexible connection. In order to flexibly connect the blade support 21 to the central coupling 1, the blade support The component 21 can also be connected to the central coupling 1 through the elastic damper 5, and the elastic damper 5 can enable the blade support 21 to produce a certain displacement relative to the central coupling 1, so as to realize flexible connection as well. In order to make the connection more stable and reliable, preferably, the number of elastic dampers 5 connected to each blade support 21 can be at least four (for example, four as shown in the figure), and at least two of them (for example, As shown in the figure, two) elastic dampers 5 are connected to the front of the blade support 21 , wherein at least two elastic d...

Embodiment 3

[0057] like Figure 9 As shown, the wind power generating set of the third embodiment of the present invention includes the impeller of the above-mentioned embodiment, the central coupling 1 of the impeller is a hub 11, the hub 11 is rotatably connected to the main shaft 12, and the main shaft 12 is fixed on the base 6 , the base 6 is connected to the tower 8 through the yaw bearing 7 , the generator rotor 91 is connected to the hub 11 , and the generator stator 92 is connected to the main shaft 12 . Specifically, both the generator rotor 91 and the generator stator 92 are located on the rear side of the hub 11 . In order to connect the hub 11 to the main shaft 12, specifically, the main shaft 12 extends into the hub 11, and a bearing is provided between the main shaft 12 and the hub 11. The number of the bearings can be one or more, and two bearings are used. More commonly, this embodiment uses two bearings, which are the front bearing 121 and the rear bearing 122 respective...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an impeller of a wind-driven power generator set and a wind-driven power generator set. The impeller of the wind-driven power generator set provided by the invention comprises a central connecting piece, wherein blade units are connected onto the central connecting piece, each blade unit comprises a blade supporting piece, blades are connected onto the blade supporting piece through a variable-pitch bearing, the blade supporting pieces are flexibly connected onto the central connecting piece, and the blade supporting pieces of every two adjacent blade units are connected through at least one elastic connector. The impeller of the wind-driven power generator set provided by the invention has the advantages that since the blade units are not mutually independent any longer but are mutually correlated, unbalance load on each blade unit can automatically reach a balance, the fluctuation of load transmitted to the central connecting piece can be fundamentally and obviously reduced, the fatigue load and vibration born by the central connecting piece can be effectively reduced, and the stable transmission of impeller load is realized.

Description

technical field [0001] The invention relates to an impeller, in particular to an impeller of a wind power generator set and the wind power generator set. Background technique [0002] A wind power generating set (also known as a wind turbine) is mainly composed of an impeller (also known as a wind wheel), a generator, a nacelle, a tower, electrical components, and a control system. Existing wind turbines, whether they are direct-drive, doubly-fed or medium-speed wind turbines, generally include a hub and at least two blade units. In order to be able to change the pitch, the blades in each blade unit generally The pitch bearing is connected to the hub, and the flange surface of the pitch bearing is generally rigidly connected to the hub through bolts. Therefore, there is no load transfer between the blade units and they are relatively independent, and the load on the blade is directly transmitted to the hub. Because the impeller of the wind turbine will be affected by wind s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F03D80/00
CPCF03D1/0658F03D9/25F05B2260/966Y02E10/72
Inventor 彭云武青虎
Owner XINJIANG GOLDWIND SCI & TECH CO LTD