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INVENTION
Russian Federation Patent RU2267647
Wind turbine blades "BANANA" FREQUENCY CONTROL METHOD
SPEED WIND TURBINE
Name of the inventor: Owner Boris Petrovich (RU); Khozyainov Denis Borisovich (RU); Lobanov Milena B.
The name of the patentee: Owner Boris Petrovich (RU); Khozyainov Denis Borisovich (RU); Lobanov Milena B.
Address for correspondence: 650026, Kemerovo, ul. Spring, 28, Kuzbass State Technical University, the patent department
Starting date of the patent: 2004.04.19
The invention relates to the field of wind energy, in particular to a wind turbine with vertical axis of rotation. The technical result is to increase the energy efficiency of wind blades of the wind turbine with a vertical axis of rotation through the use of a new profile of the blade, and a new method for generating energy and efficient speed control of the wind turbine and the torque value. Wind turbine comprising rotating wind turbine blades which are designed as airfoils, wherein each wind turbine blade profile is symmetrical and is formed by two smooth curves of varying degree of curvature of one sign, in this case the axis of symmetry passes through the middle of the length of the wind turbine blade profile. And each blade consists of two or more parts connected to each other by vertical joints with the capability of forced rotation of any part of the blade. In addition, a new method for controlling the speed of the wind turbine, in which the wind turbine blade when changing wind speed radially moves, changing the distance between the blade and the rotation of the wind turbine axis, while hurricane force bring the blade to the axis of rotation of the wind turbine, and revolves around the vertical axis of the blade, forming of legkoobtekaemuyu blade surface.
DESCRIPTION OF THE INVENTION
The invention relates to wind energy, in particular wind turbine, and can be used for mechanical and electrical energy. Known blade propeller, comprising a pen, the cross section of which is designed as a streamlined profile with a bent toe on the windward side of the profile is in the form of an ellipsoid of rotation, and the windward side - in the form of a curve described by a function of the density log normal distribution (see SU, 1740767 A1. , cl. F 03 D 1/06, 15.06.1992).
The disadvantage of this blade is that it is almost effective in a changing direction of the air flow.
Known windmill, comprising a rotor mounted on bearings in the upper and lower fixed supports. The upper and lower supports are interconnected by means of radially extending vanes, and the rotor is equipped with upper and lower discs which are connected three blades having a symmetrical cross section with rounded front and pointed trailing edges (see. US, 4,162,410 A, cl. F 03 D 9 / 00, 1979).
The disadvantage of this windmill is that its blades have a rounded front edge and a pointed rear that can not be effectively in changing the direction of air flow relative to the blade itself.
The closest in technical essence to the claimed apparatus is selected as a prototype wind turbine comprising rotating wind turbine blades which are made in the form of airfoils where input rounded edge of the blade is located at a greater distance from the rotational axis than the rear tapered edge, the outer face blade forms an optimal angle of attack to change the direction of air flow (see. RU, 7453 U1, cl. F 03 D 3/04, 16.08.1998).
The disadvantage of this device is that the wind turbine blades are fixed relative to the blade itself inlet and outlet edge. This hinders effective use of wind energy with the use of such blades in wind turbines with a vertical axis of rotation of the wind turbine as a blade, being on the windward and leeward sides, front edge changes at an output, and an output - to an input with respect to the direction of airflow. At the same time, being in the lee of the wind turbine blade prevents its rotation.
A single technical result is to increase the energy efficiency of wind blades of the wind turbine with a vertical axis of rotation through the use of a new profile of the blade, and a new method for generating energy and efficient speed control of the wind turbine and the torque value.
Said technical result is achieved by that in the known wind turbine comprising rotating wind turbine with vertical axis of rotation, the blades of which are designed as airfoils, where the front rounded edge of the blade is located at a greater distance from the rotational axis than the rear tapered edge, the outer face forms an optimum blade angle of attack with a modified air flow direction and turning boards, shielding blade according to the invention, the wind turbine blade profile is symmetrical and is formed by two smooth curves of varying degree of curvature of one sign, in this case the axis of symmetry extends centrally the length of the wind turbine blade profile.
Each blade consists of two or more parts connected to each other by vertical joints with the capability of forced rotation of any part of the blade.
Known method of controlling the turbine rotor speed wind turbine in which the rotary boards, shielding blade with increasing wind, turn and partially cover the blade, which allows to adjust the speed of rotation, and at Burevoi winds rotating shields the fully closed to each other, blocking the path of the wind to the blades ( cm. SU, A1 1257275, cl. F 03 D 3/00, 15.09.1986).
The disadvantage of this method of rotor speed control is that it is ineffective, while hurricane winds create large wind load on the first rotary panels, which transmit it to the desk for support.
The above technical result is achieved by the fact that in the process of regulation of the turbine rotor speed wind turbine in which the rotary boards, shielding blade with increasing wind turn and partially cover the blade, which allows to adjust the speed of rotation and pivoting panels fully closed position when Burevoi winds between them, blocking the path of the wind to the blades, the blades of the wind turbine according to the invention when changing wind speed radially moved, changing the distance between the blade and the axis of rotation of the wind turbine, and when hurricanes forced to bring the blade to the axis of rotation of the wind turbine, and revolves around the vertical axis of the blade, forming one of the blades legkoobtekaemuyu surface.
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Figure 1 is a schematic diagram of a wind turbine in the plan with vetronapravlyayuschimi screens and wind turbine blades "Banana". (The dotted line shows the position svobodnopovorachivayuschihsya vetronapravlyayuschih screens when the direction of the wind at 90 °). 2 is a diagram of a wind turbine in the plan with vetronapravlyayuschimi screens and wind turbine blades "Banana", forming legkoobtekaemuyu surface with hurricane wind flows. (The dotted line shows the position of the blades "Banana" in the operating mode). 3 illustrates a wind turbine blade "banana". Wind turbine blades "Banana" contains wind turbine 1 with a vertical axis of rotation 2, the blades 3, 4 vertical axis of rotation of the blade 3, 5 guides movement of the blade 3, vetronapravlyayuschie screens 6 and 7, the axis of rotation vetronapravlyayuschih 6 screens. |
Wind turbine operates as follows. When the wind air stream 8 is sent to the wind turbine 1 through 6 vetronapravlyayuschie screens that increase the wind speed and its flow is concentrated on the wind turbine blades 3 of the wind turbine 1 1. Rotating 180 ° blade changes leading edge 3 on the output and, conversely, to the input output edge . However, this change does not affect the operation of the blade 3, as they are symmetrical.
The presence of the hinge, located on the axis of symmetry of the blade 3 allows forcing the blade halves 3 rotate relative to each other and to modify the overall curvature of the blade 3 and its angle of attack, which will adjust the blade 3 in efficiency changing the direction and strength of the wind stream. Moreover, the rotation blade halves 3 can perform both simultaneously and each half separately. When hurricane wind gusts of wind turbine impeller 3 9 1 move along radial guides 5 to the axis of rotation 2 of the wind turbine 1 and 4 are deploying blade around its own axis of rotation 3, forming legkoobtekaemuyu surface.
CLAIM
1. Wind turbine comprising rotating wind turbine with vertical axis of rotation, the blades of which are designed as airfoils, where the front edge of the blade is rounded at a greater distance from the rotational axis than the rear edge is tapered, the outer face forms an optimum blade angle of attack with altered the direction of air flow, and turning boards, shielding the blade, wherein the wind turbine blade profile is symmetrical and is formed by two smooth curves of varying degree of curvature of one sign, in this case the axis of symmetry passes through the middle of the length of the wind turbine blade profile.
2. Wind turbine according to claim 1, characterized in that each blade consists of two or more parts interconnected by vertical hinges with the ability of forced rotation of any part of the blade.
3. A method for controlling the turbine rotor speed wind turbine in which the rotary boards, shielding blade with increasing wind and turn the blades partially cover that allows you to adjust the speed of the shaft, and at Burevoi winds rotating panels are brought together completely with each other, blocking the path of the wind to the blades, characterized in that the blades of the wind turbine when wind velocity changes radially moved, changing the distance between the blade and the axis of rotation of the wind turbine, while the blade hurricane force closer to the axis of rotation of the wind turbine and the blades unfold about the vertical axis of the blades legkoobtekaemuyu forming surface.
print version
Publication date 31.01.2007gg
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