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INVENTION
Russian Federation Patent RU2013646
BLADE wind turbine
Name of the inventor: Soloviev, AP
The name of the patentee: Naval Academy im.N.G.Kuznetsova
Address for correspondence:
Starting date of the patent: 1991.04.26
Use: in the wind energy sector. The inventive wind turbine blade profile and comprises a spring-loaded swivel spoiler disposed in the trailing edge region and formed in the form of two connected plate-shaped elements, one of which is flush with one of the profile surfaces. Plate elements are connected kinematically and provided with parallel axes of rotation, with the elements of the kinematic connection mounted on the rotation axis and are rotatable by an angle not exceeding 90, a plate member located flush with the surface profile is set by the retaining surface and is spring-loaded one axes or both. Profile made of composite primary and output parts, the latter has a cavity in which the axis of rotation and has a kinematic connection elements. Output of the blade is in the form of several independent units.
DESCRIPTION OF THE INVENTION
The invention relates to wind power engineering, namely to the wind turbine with its axis of rotation coinciding with the direction of action of the wind and can be used in shipbuilding.
Known wind turbine blade comprising an elongated body of the wing profile. Such blades have a relatively low efficiency. Increasing the power of wind turbines by simply increasing the length of the blades leads to serious problems of ensuring the strength and durability of blades, protection from destruction during strong winds.
Known wind turbine blades, which comprise spring-loaded bow spoiler on the suction surface or retractable spoiler profile chord perpendicularly from the pressure surface. The spoilers are provided with actuators controlled by the computer. This device is not efficient enough (lift) in operation, a relatively complex control spoiler for wind turbine speed limit during strong winds, you need a special drive.
The purpose of the present invention - increase the efficiency of the blade work due to lift and simplify the management of interceptors for the speed limit in strong winds.
For this swivel spoilers are mounted near the trailing edge of the blade, one spoiler - perpendicular to the pressure surface, the other - flush - a blade suction surface. Thus interceptors and parallel to the axis of rotation is kinematically linked (e.g., via gear) so as to ensure a simultaneous rotation in both spoilers blade trailing edge side at an angle of 90 °. Wherein one or both of spring-loaded rotating axis (for example using elastic members or springs, one end of which is fastened to the axle or toothed wheel, the other - to the body of the blade). The axis of rotation and the kinematic connection elements placed in the cavity inside the rear part of the blade, which is designed as a detachable from the rest of the blade unit. Blade height may be several such units working independently of each other.
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FIG. 1a, b shows a proposed blade, a general view and its profile; FIG. 2 back of the blade with the mechanization, cross-section.
Blade with interceptors for wind turbine comprises a body wing profile 1, separated from the blade body unit 2 (2a, 2b, 2c) with blades mechanization elements rotary spoilers 3 and 4 attached to the axis of rotation 5 spoilers, gears 6, impaled on the axis of rotation 5, the springs 7 holding the spoilers 3 and 4 in the operating position, the inner cavity of the body 8 of the blade 1, the blade 9 trim.
BLADE WORKS AS FOLLOWS
When working (permissible) speed of the incoming wind flow on the blade brake front spoiler 3, so that a region of high pressure in front of him and additional lift
The magnitude of this force can be up to 100% of wing lift. Additional blade thrust force T (r) in the plane of its rotation radius r at the same time be
In the particular case of C v = 3 and P = 0.66 x the angle of attack for T> 0 must be greater than about 12. Conjugated resistance force F (3) acting on the spoiler at the 3 allowable wind speeds, the power spring 7 is balanced, while under the influence of spoiler conjugated F (3) can turn through an angle from the vertical that does not exceed about 10. From this additional lift will not change. If you exceed the permissible strength under the influence of wind spoiler R conjugated(3) (v> vdop) rotated by a larger angle against the force of the spring. As a result, even when the angle of rotation of more than 20 of the additional force F ext(3) virtually disappear. At the same time due to the kinematic axes of communication both spoilers to the same or a greater angle turn spoiler 4. oncoming flow to it, he will continue to turn to an angle of 90, with an associated interceptor 3 takes a position near the position of 3 l. The resistance of the blade significantly increase. Indeed, in addition to the forces of resistance spoiler 4 equal 
will decrease the lift of the blade due to the appearance on the suction surface of the pressure zone in front inteptseptorom 4. In this negative pressure on the suction surface will be significantly reduced. When the wind speed drops to an acceptable value of the spoilers of the provisions of 3 l and 4 l by the action of the spring 7 will return to its original state 3 and 4. When placing interceptors 3 and 4 in the nose of the blade (as a prototype), it is impossible to achieve such an effect.
CLAIM
1. BLADE wind turbine comprising a spring-loaded turning profile and spoiler disposed in the zone of the trailing edge and configured in the form of two connected plate-shaped elements, one of which is flush with one of the profile surfaces, characterized in that, in order to improve reliability, the plate members are connected kinematically and provided the axes of rotation extending parallel to one another, with the elements of the kinematic connection mounted on the rotation axis and are rotatable by an angle not exceeding 90 o, a plate member located flush with the surface profile is set by the retaining surface of the latter, and biased one or both of the axes.
2. The blade of claim. 1, characterized in that the composite profile is formed from main and output parts, the latter has a cavity in which the axis of rotation and has a kinematic connection elements.
3. The blade of claim. 1 and 2, characterized in that the output part is in the form of several independent units.
print version
Publication date 11.02.2007gg
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