RU2522349C2 - Windwheel of wind-driven electric generator - Google Patents

Abstract

FIELD: power industry.

SUBSTANCE: invention relates to wind power engineering, and namely to windwheels of wind-driven power plants and wind-driven electric power plants with a horizontal rotation axis, which is mainly intended for operation with electric generators of a segmented type. A windwheel includes a hub connected to the main one-piece blade, to the end of which a bow of a rotor element with teeth and slots is attached by means of bolt connections. The rotor element interacts with the stator element through an air gap. The bow of the rotor element is equipped with a roller that is enveloped with a flexible element, one end of which is fixed on the hub, and the other one is fixed on the tension device that represents a pulley with a worm wheel and a worm. Branches of the flexible element are enclosed with a flexible cover representing a tubular cover forming an additional blade.

EFFECT: simpler and cheaper design at the possibility of changing aerodynamic characteristics of the additional blade by its twisting.

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Description

The invention relates to wind energy, and in particular to wind wheels of wind power and wind power plants with a horizontal axis of rotation, mainly intended for operation with segment-type electric generators.

A wind wheel is known [US Pat. RF №2211366, publ. 08/27/2003, bull. No. 24 / Litvinenko A.M. - application No. 2002104027/06 of 02.14.2002]. The technical result, which consists in simplifying the design, increasing reliability, providing drilling protection with relative cost reduction and ensuring modularity and manufacturability, is ensured by the fact that in a wind wheel containing a hub in the blades, made in the form of sail feathers, spars, cable, D-shaped the leading edge, according to the invention, the sail feathers are made in the form of elastic plates, the leading edge of which has the shape of an arch and is provided with holes for the spar.

The disadvantage of this wind wheel is the inability to use sailing-type fabric shells.

Closest to the claimed combination of essential features is a wind wheel [US Pat. RF №2249720, publ. 04/10/2005, bull. No. 10 / Litvinenko A.M. - application No. 2003130051/06 of 09.10.2003]. The technical result consists in simplifying the design, improving reliability and manufacturability while ensuring cheaper modularity. This is achieved by the fact that the blades, both main and possibly additional, are made in the form of sail feathers, namely, a shell, two-layer, isosceles triangle fastened around the perimeter, the apex of which is fixed at the hub, the base is equipped with a tension bar that is pivotally connected to the balancer, the balancer is pivotally mounted on the outer end of the tubular spar and connected to the tension rod.

Its disadvantage is the difficulty in providing the twist of the blades, which, as you know, provides the best aerodynamic characteristics.

The invention is aimed at simplifying and reducing the cost of construction.

This is achieved by the fact that the wheel of the wind generator containing a hub, main blades and additional blades with rotor elements in the form of an arc, according to the invention, the arc of the rotor element is provided with a roller, which is surrounded by a flexible element, one end of which is fixed on the hub and the other on the tensioner while the branches of the flexible element are surrounded by a flexible shell with the formation of an additional blade.

The achievement of the technical result is ensured by the rational execution of the additional blade.

The invention is illustrated by drawings, where in FIG. 1 shows a fragment of a wind wheel in front view; FIG. 2 shows a cross section of an additional blade; FIG. 3 - kinematic diagram.

The wind wheel is a hub 1 connected to the main monolithic blade 2, to the end of which the bolt 3 is bolted to the arc 4 of the rotor element with teeth 5 and grooves 6. The rotor element interacts through the air gap with the stator element 7, which is shown conditionally and mounted on a rotating base connected to the hub bearing housing. The arc 4 of the rotor element is equipped with a roller 8, which is covered by a flexible element, namely its oncoming branch 9 and the offending branch 10. The end of the oncoming branch 11 is fixed on the hub, and the end of the offending branch on the tension device 12, which is a drum with a worm wheel and worm 13, i.e. self-braking worm gear. The branches of the flexible element are surrounded by a flexible sheath 14, which is a tubular cover that covers the run-down branch 10, the run-in branch 9, and a piece of hose 15 can be put on the run-in branch to ensure aerodynamic characteristics.

The wind wheel operates as follows. When the wind flow is perpendicular to the plane of FIG. 1 from the action of the aerodynamic moment of the blade 2, the wind wheel comes into motion. This moment is increased by the action of an additional blade, which is formed by the branches 9 and 10 of the flexible element, surrounded by a flexible shell 14. In this case, it is possible to tension the flexible element using a tensioner and rollers 8, and it is also possible to provide twist by arranging the tensioner and roller 8 in different planes. Thus, a change in the aerodynamic characteristics of the additional blade, that is, twist, is possible with a relative change in the position of the second end of the flexible element mounted on the tensioner relative to the roller. When the wind wheel rotates, the rotor elements, interacting with the stator elements, induce a voltage in the latter, which is then transmitted to the consumer. The kinematic diagram shown in Fig. 3 shows the location of the main parts of the wind wheel, and also indicates the possibility of twisting by arranging the base AB and the CD arc in different planes.

The main technical and economic advantages of this wind wheel include the following:

- low cost and ease of source materials;

- simplicity and reliability of the tension mechanism - FIG. 3;

- high manufacturability, ease of assembly;

- modularity provided by the possibility of the same execution of several blades;

- high aerodynamic characteristics of the profile - FIG. 2.

Claims (1)

A wind generator wheel containing a hub, main blades and additional blades with rotor elements in the form of an arc, characterized in that the arc of the rotor element is provided with a roller that is surrounded by a flexible element, one end of which is fixed to the hub, and the other end to the tensioner, while the branches the flexible element is surrounded by a flexible shell with the formation of an additional blade.

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