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INVENTION
Russian Federation Patent RU2249720
Windwheels for wind turbines
Name of the inventor: Litvinenko AM
The name of the patentee: Voronezh State Technical University
Address for correspondence: 394026, Voronezh, Moscow Prospect, 14, Vilnius Gediminas Technical University, Department of Patent
Starting date of the patent: 2003.10.09
The invention relates to wind power engineering, namely to windwheels vetroelektroenergeticheskih and wind power plants with a horizontal axis of rotation, primarily intended for use with power segment type. The technical result is to simplify the structure, improve the reliability and manufacturability while providing cheaper and modularity. This is achieved in that the blades are in the form of the shell, dual layer bonded by an isosceles triangle perimeter, the apex of which is fixed at the hub, and the base is provided with a tension strap, which is pivotally connected to the rocker, the rocker is pivotally mounted on the outer end of the tubular side member and is connected to a tension rod .
DESCRIPTION OF THE INVENTION
The invention relates to wind power engineering, namely to windwheels vetroelektroenergeticheskih and wind power plants with a horizontal axis of rotation, primarily intended for use with power segment type.
Propellers known [1] with spherical pitch blades mounted in the sleeve, which is axially movable on the screw shaft, and the force is transmitted to the blades through the scenes with annular grooves, breadcrumbs, ball bearings and fingers.
The disadvantage of this screw, which in principle ensures Burevoi protection is the complexity of construction, having many moving parts to the manufacturing accuracy are increased requirements which, which ultimately leads to a significant cost increasing constructions.
The closest to the claimed combination of essential features for a sail with the wind wheel blades, described for example in [2]. It represents a different combination of sailing plumage from a circular, D-shaped front edges, end fairing, the central fairing, but also with a variety in terms of the front fairing, tubular spars and cable extensions.
Its disadvantage is poor reliability and reduced workability, which is connected, firstly, to the presence of D-shaped edge, and secondly, the need to dock the tissue webs D-shaped edge further questions remain achieve tension.
The invention is aimed at simplifying the structure, increasing the reliability and manufacturability while providing cheaper and modularity.
This is achieved in that the blades are formed as shell two-layer bonded by an isosceles triangle perimeter, the apex of which is fixed at the hub, and the base is provided with a tension strap, which is pivotally connected to the rocker, the rocker is pivotally mounted on the outer end of the tubular side member and is connected to the tension rod.
The achievement of the technical result provided a rational form of sail cloth blades, but also due to the fact that the main pipe - spar and traction, flexible surface covered the sail to form an aerodynamic profile.
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The invention is illustrated by drawings, where Figure 1 shows a wind-wheel, front view, Figure 2 shows the inner blade device in an enlarged form, Figure 3 shows the blade section along the median plane, drawn in Figure 4 an end view of the blade base, opposite main spar, can be seen in Figure 5 an end view of the blade base, which is situated at the tubular main spar and the tension rod. Wind wheel is a hub 1, which by means of clamps 2 reinforced pipe 3 - main spar, which is installed near the hub area 4 which serves to provide a stop tensioning rods and space fixing tops 5 isosceles shell triangle blades which is formed by two cross-linked (bonded ) around the perimeter of the flexible layers of cloth (sailing plumage). The base 6 of the isosceles triangle is provided with a tensioning strap 7 which may be formed, for example, as a channel, strip provided installed in the middle hinge 8, in which is fixed the left shoulder balancer 9 balancer provided with a central pivot 10 which is mounted on the outer end of the main pipe spar and and right hinge 11, which is fixed tension rod 12 having a tension screw 13 passing through a hole in the corner 4, the screw is provided with a nut 14, Area 4 is attached to the pipe 3 a bolt 15. The airfoil formed rod 12, the main pipe 3 spar, layer 16 and layer 17 of the flexible cloth. |
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Wind wheel operates as follows. At clash wind flow perpendicular to the plane of Figure 1, due to the presence of angular displacement relative to the base used fixing seat top 5 (in planes perpendicular to the axis of the tube 3), there is a circumferential force applied to the blades, so that the wind wheel comes into rotation.
propeller assembly takes place in the following sequence. At the position of the main parts shown in Figure 2, there is a processing by a bunting these parts, made, for example, sailcloth, in the form of isosceles triangles (2 pcs.), Then fastened around the perimeter of the cloth. The top of the equal sides 5 is fixed in the corner 4, for example, by an annular fastening. Further there is the tension of the base 6 bar 7. When tightening the nut 14 on the rod 13 rod 12 goes down - see Figure 2.. Since the rocker 9 mounted in the hinge 10 and is a lever, the right end - see Figure 2 -. With the hinge 11 moves down with a thrust of 12, and the left end of the hinge 8 moves up, thereby averting the bar 7 up. Consequently, there is tension base 6 fixed relatively early peaks 5 and accordingly only yachting cloth tension blade. Due to the angular (relative to the tube section 3) displacement of the hinge bracket 4 and twist the blade 10 is provided, which in combination with the aerodynamic profile - see Figure 3 -. Affords satisfactory aerodynamic performance, which is achieved by relatively simple technical means.
The main technical and economic advantages of the propeller include:
- Low cost and ease of starting materials - aluminum tubes (3 and 12) and sail panels with layers 16 and 17;
- Simplicity and reliability of the mechanism of a tension - 2;
- High manufacturability, ease of assembly;
- Modularity provided by the possibility of the same type of execution of several blades;
- High aerodynamic profile - see Figure 3..
INFORMATION SOURCES
1. AS USSR №1742123 - propeller with self-aligning step /N.M.Gilyazetdinov, s-ka №4673534 / 23 dated 05.04.89, published. 06.23.92, Bul. №23, MKI 5 64 C 11/30.
2. Wind / Ed. D.de Randy: Trans. with English .; ed. Ya.I.Sheftera. - M .: Energoatomisdat, 1982. - p.109, fig. 3.17; p.114, ris.3,19 and 3.20.
CLAIM
Wind wheel comprising a hub and blades are formed as a sailing Feathers having a tubular spar, characterized in that the blades are formed as shell two-layer bonded by an isosceles triangle perimeter, the apex of which is fixed at the hub, and the base is provided with a tension strap, which is pivotally connected to the balancer , the rocker is pivotally mounted on the outer end of the tubular spar and is connected to a tension rod.
print version
Publication date 02.02.2007gg
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