Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Blade mounting

a technology for mounting blades and rotor blades, which is applied in the direction of wind energy generation, motors, engine fuctions, etc., can solve the problems of difficult and risky operation of rotor blades mounted to the hub, affecting the performance of rotor blades, and unable to generally only be lifted. , to achieve the effect of fast, safe and secure method of blade mounting operation

Inactive Publication Date: 2012-06-07
GE WIND ENERGY NORWAY
View PDF3 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]It is one object of the present invention to overcome the drawbacks and disadvantages of the above described prior art. The solution according to various aspects of the present invention provide a fast, safe and secure method for the blade mounting operation.
[0013]Thanks to the arrangement according to certain aspects of the invention, the mounting of the second rotor blade and the next-coming rotor blades to the rotor hub can be carried out in a safe and secure manner. The mounting operation can also be carried out in a fast and cost-effective manner. The investment cost of the equipment needed for various embodiments of the invention is low.

Problems solved by technology

The lifting of the rotor hub with several rotor blades mounted to the hub, is a difficult and risky operation because of the high total weight of the rotor hub and the rotor blades together.
The lifting is weather dependent and can generally only be performed on calm days with no wind.
The geographic places chosen for wind power plants to be built on are preferably windy places and it can therefore be understood that the mounting normally will be very costly.
The in situ mounting of rotor blades on the rotor hub of a wind power plant is accompanied by at least two problems to deal with, namely lifting the rotor blade from the ground up to the rotor hub and, after having mounted the first rotor blade to the rotor hub, handling the considerable imbalance which has been introduced due to the one-sided load of the blade.
A disadvantage of mobile cranes is that they must always be on site when the rotor blades are to be mounted to the hub of the wind power installation.
Furthermore, the ground surrounding the wind power plant may not be smooth and even but mountainous or hilly leading to difficulties in transporting the huge mobile crane to the site.
Using a crane for the mounting of the rotor is combined with big expenses, either for the rental or for the owing of the crane as well as for the transportation of the crane.
After having lifted and mounted the first rotor blade to the rotor hub, a considerable imbalance due to the one-sided load of the blade is introduced.
In the next step of the process, when the rotor hub is further rotated into the mounting position for the next blade, the imbalance leads to a considerable torque of the rotor hub to be overcome.
This is a heavy, unsecure and time consuming solution.

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
  • Blade mounting
  • Blade mounting
  • Blade mounting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020]FIG. 1 is an overview of a wind power plant. A rotor blade 51 is being lifted up to the rotor hub 40 at the upper part of the tower 50 in order to be fitted with its rotor blade connection 52 to the flange 41 of the rotor hub 40, which is connected to the main shaft by means of a hub flange (shown in FIG. 2).

[0021]FIG. 2 is a side view of the interior of the machine housing of the wind power plant. A brake disc 1 is centrally mounted on the main shaft S of the wind turbine and has a large diameter, normally in the range of 1.5-3 meters. The brake disc 1 extends with a portion of its periphery into the gap of a number of brake units 5. The brake disc 1 is provided with a connecting means 2, consisting of a number of through bores evenly distributed on the brake disc 1 at a certain distance from the axis of the brake disc 1. The number of through holes and the degree of angles between the through holes may vary depending on the different needs. A locking device 20 is positioned ...

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

PropertyMeasurementUnit
Angleaaaaaaaaaa
Distanceaaaaaaaaaa
Login to View More

Abstract

The present invention concerns an arrangement for in situ mounting of rotor blades to a rotor hub of a wind power plant comprising rotor blades, a rotor hub (40), a disc (1), a means for rotation (30) of the disc (1) around its axis. The disc (1) is in connection with the rotor hub (40) in such a way that when the disc (1) rotates a certain degree of angle around its axis (3) it will cause the rotor hub (40) to rotate the same degree of angle around the axis of the rotor hub. When the means for rotation (30) comes into a desired position, the disc (1) is secured by a securing means (20; 36, 37).

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is a national stage application under 35 U.S.C. §371(c) of prior-filed, co-pending PCT patent application serial number PCT / EP2010 / 053133, filed on Mar. 11, 2010 which claims priority to U.S. provisional patent application Ser. No. 61 / 186,182, filed on Jun. 11, 2009 and Swedish patent application serial number 0950152-9, each of which is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]The field of the present invention concerns the area of construction of a wind power plant and more specifically an arrangement and a method for mounting rotor blades to a rotor hub of a wind power installation in situ. Various aspects of the invention also concern a wind power installation implementing the method.[0003]The most common way for mounting rotor blades to a rotor hub is to perform the mounting on the ground, i.e. all of the rotor blades are fitted to the flange of the rotor hub, which rotor hub is resting o...

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
IPC IPC(8): B21K3/04
CPCF03D1/001F03D1/003F03D1/0658F03D7/0268F03D11/00Y10T29/37Y02E10/721Y02E10/722Y02E10/723Y02E10/728F05B2260/30F03D80/00F03D13/10F03D80/50Y02E10/72F05B2260/31F03D13/108F03D1/066
Inventor LINDBERG, MIKAELHEDBERG, JOHAN
Owner GE WIND ENERGY NORWAY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com