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INVENTION
Russian Federation Patent RU2209999
Wind turbine for wind turbines
Name of the inventor: Akari AI .; Zelinsky AM .; Medvedev MM .; Pepelin AB
The name of the patentee: OOO "Meader-K"
Address for correspondence: 125008, Moscow, pr-d Cherepanov, 36, kv.8, ID Efimov
Starting date of the patent: 2002.09.12
The invention relates to wind energy and wind turbines with regard to many propeller. The technical result achieved in the implementation of the invention is to provide a wind turbine, which provides the most complete conversion of wind energy into useful work by reducing the flow cross section for the wind flow as it passes through the wind turbine and the choice of form and position of the blades and is provided by the fact that wind turbine comprises horizontal shafts attached to each of these two bladed propeller, the axle shafts are arranged parallel to each other so that the blades of one propeller on the shaft of each adjacent pair of rollers are disposed between the blades of two windwheels second shaft, each blade has a trapezoidal shape with an angle equal to half of the angular pitch of the blades at a single propeller, and the blades on each shaft of propeller blades are offset with respect to the second propeller in the circumferential direction by half the angular pitch.
DESCRIPTION OF THE INVENTION
The invention relates to wind energy and wind turbines with regard to many propeller.
Known wind power station comprising horizontal shafts with fixed propeller on them. Propeller installed in the housings on the frame and kinematically connected to the generator (copyright certificate of the USSR 1280180, F 03 D 1/02, 1986).
Known wind turbine comprising a horizontal shaft with a propeller attached to them. The vertical supports are made in the form of gratings with rectangular cells and propeller blade positioned between the gratings (copyright certificate of the USSR 1130033, F 03 D 1/02, 1985, the closest analogue).
The disadvantage of both known wind turbine is a large area occupied by nearby propeller, and therefore inefficient use of wind energy with a certain area.
The task to be solved by the invention is to provide a wind turbine, which provides the most comprehensive wind energy into useful work by reducing the flow cross section for the wind flow lie passes through the wind turbine and the choice of form and position of the blades.
The problem solved by the invention is achieved by the fact that the wind turbine comprising a horizontal shafts attached to them blade propeller according to the invention on each shaft are fixed two propeller at the same distance from each other, the axle shafts are arranged parallel to each other so that the blades of one windwheel each adjacent pair of rollers are disposed between the blades of two windwheels second shaft, each blade has a trapezoidal shape with an angle equal to half the angular pitch blade arrangement on one propeller, and on each shaft the blades of one propeller are displaced relative to the blades of the second propeller in the circumferential direction by half the angular step.
Anchoring on each shaft two windwheels equidistant from each other, the arrangement of the axes of shafts parallel to each other so that the blades of one propeller of each adjacent pair of rollers are located between the vanes of two windwheels second shaft, the execution of each blade is trapezoidal shape with an angle equal to half the angular pitch the blade arrangement on one propeller, and offset on each shaft the blades of one propeller with respect to the blades of the second propeller in the circumferential direction by half the angular pitch provides a near-minimum total energy extraction area of the wind passing through the wind turbine, but also the total projected area of all the blades both windwheels on one shaft on a plane perpendicular to the axis of rotation windwheels, as close as possible to the area swept by the blades, which allows you to select all the power of the wind flow with the swept surface.
Wind turbine may be provided with a fixed cylindrical casing covering the whole front of the propeller and propeller extended by at least the length of the blade, thus increasing the amount of torque. When rotating propeller air cast in the direction of rotation and forward against the direction of wind flow. Cast off the air reflected the housing so that the flow of the wind, the incident at the propeller, is twisted in the direction of their rotation, which increases torque and thus the effectiveness of windwheels. Due to the reflection of the largest air twist oncoming wind stream is achieved by a cylindrical casing. The length of the housing is determined by the distance at which the reflected air velocity is close to zero. With optimal parameters of the blades and the rotational speed windwheels it is close to the radius windwheels and thus to the length of the blades.
Each blade may be provided with a flat windward side and the leeward side with a convex, sharp leading and trailing edges, which reduces losses in the rotation of the blades and creates the greatest torque and rotational speed.
Each blade can be twisted, which allows maximum use of the area of the blades to generate torque.
The convex blade may have the greatest thickness in the middle of its chord profile that provides the least resistance to the blade.
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FIG. 1 shows a general view of a wind turbine; Figure 2 - view of a wind turbine in front; Figure 3 - view from the top of a wind turbine; 4 - side view of a wind turbine; Figure 5 - a view of the twisted blade. |
Wind turbine 1 comprises horizontal rolls, with two fixed on each of them the two propeller blade 3, 4 and 5, 6 at the same distance l from each other. The number of rolls can be unlimited. The axes of shafts 1, 2 are arranged parallel to each other so that the blades of one propeller 5, 7 on the shaft 2 of each adjacent pair of shafts 1, 2 are located between the blades 9 and 10 two windwheels 3 and 4 of the second shaft 1. The vanes 8 of the second propeller shaft 2 to 6 9 overlap the propeller blades 4. Similarly, the propeller blades 9 on the shaft 4 adjacent pair of shafts 1 and 1 are disposed between the two blades 7 and 8 of two windwheels 5 and 6 of the shaft 2.
Each blade 7 or 8 or 9 or 10 has a trapezoidal shape with an angle equal to half the angular pitch t arrangement of blades on one propeller, and on each shaft one or two blades 9 or 8 of propeller 4 and 6 are displaced relative to the blades 10 or 7 of the second propeller 3 or 5 in the circumferential direction by half the angular pitch t.
Wind turbine may be provided with a fixed cylindrical casing 11 covering all the propeller 3, 4, 5, 6, etc. and an extended front propeller 4 and 6 is not less than the blade length L.
Each blade may be formed with a flat 12 and the windward side of the convex leeward side 13, and a sharp leading edge 14 and trailing edge 15.
Each blade can be twisted.
Each convex lobe may have the greatest thickness in the middle of its chord b.
Wind turbine operates as follows.
Wind impacting trapezoidal blades 9, 10, 8, 7 windwheels 4, 3 and 6, the shaft 5 causes rotation 1 and 2. The wind acts on the first overlapping blades 8 and 9 windwheels 4 and 6, to provide close to minimum total wind energy extraction area, passing through the wind turbine and then acts on the blade 10 and 7 windwheels 3 and 5, which are shifted with respect to the blades 9 and 8, to provide the total projected area of all the blades both windwheels 4, 3 or 6, 5 on one shaft 1 or 2 in a plane perpendicular to the axis of rotation windwheels, as close as possible to the area swept by the blades, which allows you to select all the power of the wind flow with the swept surface.
When the wind flow passage through a fixed cylindrical casing 11 covering all the propeller 4, 3, 5 and 6, the rotating propeller 4, 3, 5 and 6, which blades throw the air in the direction of rotation and forward against the flow direction of the wind. Cast off the air reflected the housing 11 so that the flow of the wind, the incident at the propeller, is twisted in the direction of their rotation, increasing torque and, thus, the effectiveness of windwheels.
With clash of wind on the blade with the flat windward side 12 and a convex leeward side of 13, the sharp leading edge 14 and trailing edge 15 reduces losses during the rotation of the blades, which allows you to create the highest torque and speed.
With clash of wind on the twisted blades ensures maximum use of the area of the blades to create torque.
With clash of wind on the blade is convex with the greatest thickness in the middle of its chord b it provides the least resistance to the blade profile.
CLAIM
1. Wind turbine comprising a horizontal shafts attached to them propeller blade, characterized in that on each shaft two propeller mounted equidistant from each other, the axle shafts are arranged parallel to each other so that the blades of one propeller shafts each adjacent pair of vanes disposed between two windwheels second shaft, each blade has a trapezoidal shape with an angle equal to half the angular pitch of the blades at a single propeller, and the blades on each shaft of propeller blades are offset with respect to the second propeller in the circumferential direction by half the angular pitch.
2. Wind turbine according to claim 1, characterized in that it is provided with a stationary cylindrical casing covering the whole front of the propeller and propeller extended by at least the length of the blade.
3. Wind turbine according to claim 1 or 2, characterized in that each blade is formed with a flat windward side and the leeward side convex, sharp leading and trailing edges.
4. Wind turbine according to claim 3, wherein the blade is twisted.
5. Wind turbine according to claim 3 or 4, characterized in that the convex blade is thickest in the middle of its chord.
print version
Publication date 31.01.2007gg
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