FI67919C - ROTOR CONSTRUCTION FOR VINDROTORANORDNING - Google Patents

Description

6791 9

The present invention relates to a rotor structure of a wind rotor device according to the preamble of claim 1.

5 To date, vertical rotors of a similar type, operating on the basis of Flettner's law, have been manufactured with the aid of end plates or other similar fasteners located at the ends of the rotor. In this case, the span of the fastenings has remained long and flexible, with the wings remaining in the middle 10 without support. Flettner's static vertical rotors have the same large wind-surface area against the wind, even if they are stopped during a storm. In this way, the rotors have been easily vulnerable in storms.

The object of the invention is to eliminate the above-mentioned drawbacks and to provide a completely new type of rotor structure.

The invention is based on controlling the flow of wind by means of the shape and fastening of the rotor structure so as to achieve a better flow pattern in the rotor by using wing-shaped fasteners which guide the wind in the axial direction and allow removal of end plates which would otherwise adversely affect rotor flow.

More specifically, the rotor structure according to the invention is characterized by what is set forth in the characterizing part of claim 1.

The invention provides considerable advantages. Thus, the sii-30 pilot system allows the rotor to operate both vertically and horizontally in the direction of the wind, as the wind can also blow end-to-end through the rotor. In addition, the rotor becomes very durable even in the vertical position, since several fasteners can be used which distribute the load on the shaft 35 evenly and allow the actual blades of the rotor 2 67919 to be firmly attached directly to the shaft at short fastening intervals. The rotor thus manufactured exceeds the corresponding type of rotors in the endurance of high wind speeds.

5

The brackets allow the rotor to tilt, while keeping the direction of wind flow inside the rotor correct.

The brackets form the turbine impeller as the wind pu-10 holds through a rotor rotating in a horizontal position.

The brackets distribute the bending moment of the rotor shaft over the entire width of the rotor, so a much thinner shaft can be used inside the rotor or the shaft 15 can be removed completely, which facilitates wind flow through the rotor in its vertical position and at different tilt angles.

The brackets eliminate the need for rotor end plates and thus allow for a more versatile use of this type of rotor.

The invention will now be examined in more detail with the aid of the accompanying drawing.

Figures 1, 2 and 6 show, in different perspective views, one rotor structure according to the invention.

Figure 3 shows a cross-section of the rotor according to Figure 1.

Figure 4 is a perspective view of three different shapes of fastener 30.

Figure 5 shows a perspective view of a mounting arrangement for one rotor according to the invention.

35 A rotor based on Flettner's law is connected to blades, i.e. brackets 4, 4 ', 4 ", which have a good aerodynamic, wind-controlling shape. When the wind flows inside the rotor, these brackets 4, 4', 4" guide

II

3 67919 in the direction of the actual rotor blades 1, 2 of the wind. At the same time, part of the kinetic energy is transmitted directly through the brackets 4, 4 ', 4 "to the shaft 3. As the wind flow slightly changes direction due to the brackets 4, 4', 4", the flow meets the actual rotor blades 1, 2 at a better angle.

In Figure 1, the rotor is provided with brackets 4 / having a shape approaching the wing profile of the aircraft. With such a shape, a very high strength is achieved for the shaft 3, since a relatively thick amount of material relative to the rotor can be used, while at the same time improving the flow. For example, if we compare the shape of the wing 4 with the shape of a round bar that would be mounted in the same way, the ratio would be as follows. The 25 mm diameter round steel bar 15 has the same air resistance as the 70 mm high and 500 mm wide wing profile (found in the wind tunnel).

Figure 6 most clearly shows how the wing-shaped brackets make the ends of the rotor completely open, which allows the snow and the chute to escape from inside the rotor.

This is a great advantage because in rotors with end plates, during a snowstorm, the rotor fills from the inside because the snow cannot fall off and stops. Figures 2 and 4C show that for the same purpose as above, a turbine blade-like shape can also be used, which gives a lighter and more material-saving structure and is easier to manufacture than a standard blade profile. The wing-shaped fasteners 4, 4 ', 4 "can be fastened to the actual rotor blades 1, 2, which are made of reinforcing plastic or metal. The fastening is done, for example, by riveting and gluing.

Due to the small span, a very strong assembly is thus obtained inside the clamping wing, which does not easily start to oscillate even at high wind speeds. Low vibration sensitivity is highly valued, because if the blades start to vibrate, the durable rotor structures will disintegrate.

4,67919

It can be said that the brackets 4, 4 ', 4 "have an ideal aerodynamic shape and a simple construction that can increase the efficiency of the actual rotor blades. This type of vertical rotor becomes economically advantageous because it allows the rotor blades themselves to be thinned. The solution also allows Flettner's law vertical rotors without end plates so that they become very durable and efficient.

10 At the same time, it is possible to design the rotors so that they can be tilted steplessly to the horizontal in a wind direction, while continuously utilizing wind force. Equipped with a turntable, the rotor provides a completely storm-resistant (tested in wind tunnel 15 speeds above 60m / s), vertical-axis wind rotor, whose spring force always automatically returns to the vertical position to take advantage of very quiet wind speeds.

Il

Claims (1)

A rotor structure of a wind rotor device comprising a body 5, two elongate blades (1, 2) having a curved cross-section and arranged axially about a geometric axis so symmetrically that the concave halves of the blades 10 (1, 2) are partially abut each other so that an axial gap is left between the inner edges of the wings (1, 2) and which wings (1, 2) are helically twisted relative to each other. 15. a rotor shaft (3) parallel to the geometric axis and connected at one end to the frame, and ribbed fasteners (4) transverse to the rotor shaft (3) connecting the edges of the vanes (1, 2) to stiffen the structure, characterized by that the brackets (4, 4 ', 4 ") are arranged at axial intervals over the entire length 25 of the vanes (1, 2) and the brackets (4, 4', 4") have a convex cross-section in the other direction of the rotor shaft (3), e.g. in the shape of a flying wing profile.