The rotor of a wind turbine

 

(57) Abstract:

The invention relates to wind power and for rotors of wind turbines. The technical result consists in increasing the efficiency of regulation of a wind turbine and its reliability, reducing the complexity of the manufacturing, maintenance and repair. The solution of this problem is achieved in that the rotor of a wind turbine with at least two blades of a C-shaped profile mounted on a vertical shaft, a C-shaped blade attached, with the possibility of rotation on parallel lifting beams which are rigidly connected with a vertical shaft, and the anchor point of the blades is located on the axis of symmetry of the blade beyond its center of gravity in the direction from the top of the C-shaped profile of the blade, which at least one articulated thrust relates corresponding points on the other blade, and each blade by means of a bracket rigidly connected with it, is connected with the elastic element and the tensioning traction with at least one of the traverse. The difference is that bracket length l should correspond to the relationship: l> Fmax-Fmin)Fmax/Fminwhere Fmaxthe maximum deformation of the elastic element; Fm is rgetic and touches the rotors of wind turbines.

Known multilevel turbine, containing mounted on a vertical shaft impeller and guide vanes placed along the shaft coaxially him [1].

Famous carousel windmill comprising a vertical shaft and radial blades, each of which is made in the form attached to the shaft of the frame and installed it can be rotated about a horizontal axis parallel plates [2].

Known wind turbine with vertical mounted on the bearing shaft and secured on the impeller, which is made of composite wind profiles that are installed parallel to the shaft can be rotated around the axes. In the initial state airfoils adjoin one another and form a C-shaped blades of the impeller (rotor) of a wind turbine [4].

A common disadvantage of the above devices is changing the number of revolutions of the rotor of a wind turbine within wide limits, depending on the wind strength and the propensity for unlimited dispersal in a strong wind, which leads to the need to create significant reserves of strength and periuterine.

Closest to the technical nature of articulated rods, fixed brackets on the hollow vertical shaft, and adjustable S-shaped blades with variable surface area. The rotor is provided with a rod placed in the cavity of the shaft, the latter is provided with longitudinal slots, the rotor blades are made of C-shaped composite height of the upper fixed part with the guide grooves on the outer edges and at least one lower movable part with rollers placed in the grooves of the fixed blade, and thrust profiled blades are connected with the rod being attached to the lower part of the C-shaped movable blades [3].

The disadvantages of this device are:

- the presence of two types of aerodynamic blades, shaped and C-shaped, which can result in conditions upstream or downstream, as well as the turbulence to the opposite effect, i.e., when the aerodynamic forces acting on a profiled blade, exceeds the force of inertia, it may not lead to a decrease in the square C-shaped blades, and to increase,

- small adjustment range. The area of the swept surface of the C-shaped blades is not completely in terms of, for example, a hurricane or strong then the ri which the rotor is able to maintain a constant speed, that reduces the effectiveness of regulation,

- low reliability, because the presence of the reciprocating moving pairs of friction makes this device almost not workable in icing conditions, when intense precipitation in the form of snow or high dust content in the air,

- difficulty in manufacturing, maintenance and repair, because the production of mutually movable blades, a large area is not practically feasible due to the inability of legends sufficient rigidity.

The objective of the invention is to increase the effective regulation of a wind turbine and increase its reliability, reducing the complexity of the manufacturing, maintenance and repair.

The solution of this problem is achieved in that the rotor of a wind turbine with at least two blades C-shaped profile, mounted on a vertical shaft, C-shaped blades fixed to rotate on parallel lifting beams which are rigidly connected with a vertical shaft, and the anchor point of the blades is located on the axis of symmetry of the blade beyond its center of gravity in the direction from the top of the C-shaped profile of the blade, which at least one articulated thrust is connected in one the s by means of the elastic element and the tensioning traction with at least one of the traverse.

The difference is that the length of the bracket 1 should correspond to the value:

1 > (Fmax-Fmin)Fmax/Fmin< / BR>
where Fmaxthe maximum deformation of the elastic element;

Fmin- minimum deformation of the elastic element.

Regulatory efficiency increases due to the use of C-shaped blades as a regulatory element, full use of space swept square C-shaped blades, insensitive to the turbulence of the wind flow and the use of special geometrical relations in the mechanism of regulation. Improving reliability, reducing the complexity of the manufacturing, maintenance and repair due to the simplicity of the design of a regulatory mechanism.

The rotor of a wind turbine is depicted in the drawings, where Fig. 1 shows a top view of the rotor at the top and the dash-dotted line limit position of the C-shaped blades, Fig.2 shows the rotor side of Fig.3 shows the tensioning mechanism.

The rotor of the wind turbine includes a C-shaped blade 1 (Fig. 1,4,2), mounted to rotate in the hinge 2 (Fig.1, figs.5, Fig.6) in parallel traverse 3 (Fig.1, figs.2) which are rigidly connected with vertion of gravity at the point O, the distance a (Fig.1), which at least one articulated thrust 5 (Fig.1) is connected in the same locations using simirnov 6 (Fig.7) and 7 (Fig.8-9) with the other blade, and each blade by means of a bracket 8 (Fig.1-3) having a length l, rigidly connected to it, is connected with the elastic element 9 (Fig.3) and idler thrust 10 (Fig.3) at least one of the traverse 3. On the blade 1 (Fig.1) fixed the balancing loads 11 (Fig.10).

The rotor operates as follows.

Under the influence of the wind rotor starts to rotate and reaches the rated speed. When the wind speed is greater than estimated, the rotor is gaining momentum and blade 1 begins to rotate in the hinge 2 around the axis About under the influence of the moment of the centrifugal force applied at the point T, overcoming pretensioning Fminthe elastic element 9, while the elastic element 9 is stretched, preventing further rotation of the blade. Because the blades are interconnected hinge rods 5, they are rotated synchronously, while the aerodynamic properties of the rotor is changed, with the full rotation of the blades of the rotor becomes in the limit type aerodynamically symmetrical figures, in which the wind flow can not create torque momirovova characteristics, i.e., a small rotation of the blades should correspond to a large change in the aerodynamic properties, the length of the bracket 8 is selected such that ran the ratio

1 > (Fmax-Fmin)Fmax/Fmin< / BR>
where Fmaxthe maximum deformation of the elastic element;

Fmin- minimum deformation of the elastic element.

When the rotor stably supports the rated speed.

Pretensioning of the elastic elements 9 is performed by means of a screw rod 10, and the balancing of the blades relative to the axis by means of a set of goods 11.

The proposed rotor of a wind turbine in comparison with the prototype provides the following technical and economic advantages.

1. Regulatory efficiency increases due to the use of C-shaped blades as a regulatory element, i.e., eliminates additional profiled blades exposed to aerodynamic forces uncertain direction because the wind flow can be ascending or descending runs, and also occur disruption of flow and turbulent flow, which leads to chaotic change in aerodynamic forces. The effectiveness reg sensitivity to changes in wind speed, and the use of special geometric relations in the regulatory mechanism that contributes to more stable to maintain rated speed, and prevents the destruction of the rotor when the wind is strong.

2. Improving reliability, reducing the complexity of the manufacturing, maintenance and repair due to the simplicity of the design of a regulatory mechanism, of mechanism excluded additional profiled blades, a pair of sliding friction, guides and rollers.

1. The rotor of a wind turbine with at least two blades of a C-shaped profile, mounted on a vertical shaft, wherein the blade is fixed to rotate on parallel lifting beams which are rigidly connected with a vertical shaft, and the anchor point of the blades is located on the axis of symmetry of the blade beyond its center of gravity in the direction from the top of the C-shaped profile of the blade, which at least one articulated thrust relates corresponding points on the other blade, and each blade by means of a bracket rigidly connected with it, is connected with the elastic element and the tensioning traction with at least one of the traverse.

2. The rotor of a wind turbine under item 1,Fmax/ Fmin,

where Fmaxthe maximum deformation of the elastic element;

Fmin- minimum deformation of the elastic element.

 

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