Wind power generator
a wind power generator and generator technology, applied in the direction of machines/engines, sustainable buildings, mechanical equipment, etc., can solve the problems of increasing the size and the overall length of the nacelle became long, etc., to reduce the weight of the nacelle, simplify the construction of the nacelle, and shorten the amount of rotor overhang
Inactive Publication Date: 2012-05-03
HITACHI LTD
View PDF2 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention provides a downwind type wind power generator that can shorten the rotor overhang and make the nacelle more lightweight. This is achieved by designing the blades with a curved intermediate section that overcomes the issue of excessive rotor overhang without compromising the clearance between the blade and the tower. This results in a more efficient and lightweight wind power generator.
Problems solved by technology
Therefore, the overall length of the nacelle became long, and thus the size and weight of the nacelle was also increased.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
embodiment
[0029]In the following, an embodiment of a wind power generator to which the present invention is applied is explained. FIG. 1 is a schematic side view of an embodiment of a wind power generator to which the present invention is applied, and illustrates the state as seen in the horizontal direction that is orthogonal to the wind direction during normal operation (this is the same in FIG. 2 described later). The wind power generator 1 comprises a nacelle 10, a tower 20 and a rotor 30.
[0030]The nacelle 10 is the portion that houses a generator, transformer, control panel, lubrication equipment, cooling equipment and the like (which are not illustrated in the drawings). Moreover, as necessary a step-up gear, which increases the speed of rotation of the rotor 30 and transmits that rotational speed to the generator, is provided in the nacelle 10.
[0031]The nacelle 10 has a nacelle frame (not illustrated in the drawing) on which the devices and equipment above are mounted, and the nacelle ...
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
Login to View More Abstract
This wind power generator comprises: a nacelle that houses a generator; a tower, the top end section thereof being connected to the nacelle and the bottom end section being fastened to a base section; and a rotor that is located on the downwind side of the nacelle during normal operation, and that by receiving the force of the wind and rotating, drives the generator. The rotor has a hub that is supported such that it can rotate, and a plurality of blades that are arranged such that they extend radially from the hub. The blades, when not loaded, are pre-bent blades that are formed such that the middle section of each blade is curved outward with respect to a straight line that connects the root end section of the blade that is attached to the hub and the tip end section on the outer diameter side of the rotor, with a specified coning angle being applied to the blade.
Description
CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority under 35 U.S.C. 119 based upon Japanese Patent Application Serial No. 2010-243064, filed on Oct. 29, 2010. The entire disclosure of the aforesaid application is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to a downwind type wind power generator in which the rotor is located on the downwind side of the nacelle, and more particularly to a downwind type wind power generator in which the entire length of the nacelle is shortened.BACKGROUND OF THE INVENTION[0003]A wind power generator generates electrical power by a rotor driving a generator that is housed inside a nacelle that is located on the top of a tower.[0004]As such a wind power generator, there is an upwind type, in which the rotor is located on the upwind side of the nacelle during normal use, and a downwind type, in which the rotor is located on the downwind side of the nacelle.[0005]A downwind type wind ...
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
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): F01D5/14
CPCF03D1/0608F03D1/065F05B2240/2213Y02E10/726Y02B10/30Y02E10/722Y02E10/721F05B2250/71Y02E10/72
Inventor YOSHIDA, SHIGEOTOBINAGA, IKUO
Owner HITACHI LTD