section Home
Production, Amateur
Radio amateur
Model aircraft, rocket-
Useful, entertaining 		Stealth master
Electronics
Physics
Technologies
invention 		space Mystery
Earth Mysteries
Secrets of the Ocean
Stealth
section Map
Start
Forum
Use of material is permitted for reference (for websites - hyperlinks)
INVENTION
Russian Federation Patent RU2272173

CD CONTROL SPEED AERODYNAMIC TYPE FOR Wind Turbine

CD CONTROL SPEED AERODYNAMIC TYPE FOR Wind Turbine

Name of the inventor: Gabchenko Valery Fedorovich (RU); Lavrov Valery Stepanovich (RU); Porhachev Viktor (RU); Ulanovskii Jacob Benediktovich
The name of the patentee: Limited Liability Company "STROYENGINEERING SM"
Address for correspondence: 141980, Moscow region, Dubna, Str.. Tverskaya, 9, kv.637, VS Lavrov
Starting date of the patent: 2004.06.02

The invention relates to wind energy, namely, to the devices of speed control and torque propeller. The technical result consists in the creation of a device allowing to increase the accuracy of maintaining speed propeller with sustainability and the necessary characteristics for dynamic processes, improving orientation propeller to the wind, the elimination effect on the operation of wind turbines aerodynamic wake of the tower, but also the simplification of wind turbine design provided by the fact, wind wheel comprises a hub that is rigidly fixed on it bearing units in which the blades are placed rotatably about their axes arranged conically in relation to the propeller axis. The hub of the propeller taken by the device, affecting the rotation of the blade, which consists of a guide mounted on it at least two springs of different stiffness, rigidly fixed to the supporting parts rocking blades connected via rods sliding along the guide tappet resting on the spring of lesser rigidity, and spring compression control device. The springs are capable of sequential shutdown of the operation of the spring stiffness at first, and then more.

DESCRIPTION OF THE INVENTION

The invention relates to wind energy, to speed control devices and torque propeller.

Known centrifugal regulator of revolutions, as described in European Patent №0043872, taken as a prototype. Described in the prototype wind turbine is a device that affects the blades turn, positioned perpendicular to the axis of the blades, which respectively have the ability to rotate about their axes and provided with centrifugal weights. The apparatus includes rigidly fixed to each blade rocking which through rod connected with sliding on the guide part, which is under the influence of torque generated by the centrifugal weights, transmit force to act in the opposite direction, put on the spring guide different rigidity arranged to sequentially turn off of work (termination compression) spring stiffness at first, and then more. Each blade is mounted in the bearing assembly which is attached to the disk is rigidly mounted on the propeller shaft. and has a compression spring control device.

The common essential features of the proposed technical solutions with the prototype are as follows - wind turbine is a device that affects the rotation of the blades, which respectively have the ability to rotate about their axes. The apparatus includes rigidly fixed to each blade rocking which through rod connected with sliding along the guide part which transmits the force to act in the opposite direction, put on the spring guide different rigidity arranged to sequential shutdown of operation (termination of compression) spring first less stiffness, and then more. Each blade is mounted in the bearing assembly. and has a compression spring control device.

In a prior art device during rotation of the propeller blades on the cargo attached to the centrifugal forces arise that create torque relative to the blade axis, which tends to turn the blade in the direction of decreasing the angle of attack and, therefore, reduce the speed VC. This speed control mechanism provides the necessary counteracting torque about the axis of rotation of the blade. mechanism parameters are selected in such a way as to counteracting the moment created mechanisms to ensure the stability of the speed propeller in a wide range of wind speeds. A feature of the mechanism of this control is that any combination of the parameters of the mechanism of counteraction moment generated mechanism is a non-decreasing function of the angle of rotation of the blades. This means that when the blade is rotated in the direction of decreasing the angle of attack counteracting the moment generated by the mechanism can only increase.

The disadvantages of the above centrifugal regulator are:

1. In the event of fluctuations in the angle of rotation of the blade relative equilibrium position regulating centrifugal moment tends to increase with the angle of rotation of the blade, and therefore the counteracting torque produced by the spring, and should increase, and thus to provide static stability of the system (damping) with greater intensity than regulating centrifugal moment. In connection with what has to make a spring of high rigidity, which leads to occurrence of unevenness as the speed for the wind speed and the load and to ensure consistent accuracy of low speed propeller.

2. The presence of heavy loads.

3. Poor performance in dynamic processes and the complexity of the system to ensure the dynamic stability of the smallness of (or even the complete absence) of damping forces. In theory, centrifugal regulator is proved that in the absence of damping, centrifugal regulators are dynamically unstable.

4. The propeller of this design is characterized by large yaw rate, unstable orientation of the wind, the impact on the work of an aerodynamic wake tower associated with a perpendicular arrangement of the axes of the blades to the propeller shaft.

The technical problem to be solved by the proposed invention is to provide a device that allows to increase the accuracy of maintaining speed VC with sustainability and the necessary characteristics for dynamic processes, improve the orientation of the propeller to the wind, the elimination effect on the operation of wind turbines aerodynamic wake of the tower, but also the simplification of wind turbine design .

To solve this technical problem wind wheel comprises a hub fixedly mounted on it bearing units in which the blades are placed rotatably about their axes arranged conically in relation to the propeller axis. The hub of the propeller taken by the device, affecting the rotation of the blade, which consists of a guide mounted on it at least two springs of different stiffness, rigidly fixed to the supporting parts of the blades rocking connected via rods sliding along the guide tappet resting on the spring of lesser rigidity, device compression springs regulation. The springs are capable of sequential shutdown of the operation of the spring stiffness at first, and then more.

Distinctive features of the proposed technical solutions are known from the following - wind wheel comprises a hub on which are fixed inside the housing units and which is the regulatory mechanism (a device that affects the rotation of the blade); blades are arranged conically in relation to the propeller axis.

Due to the essential features of the proposed technical solutions together with renowned technical result is achieved by the following:

1. Set the value of the aerodynamic moment about the axis of rotation of the blade is a non-decreasing (in absolute value) function of the angle of rotation of the blades. This means that when the blade is rotated in the direction of decreasing the angle of attack counteracting the moment generated by the mechanism can only increase.

2. This control allows you to maintain a high accuracy for speed in connection with the provision of a system of static stability (without the presence of unevenness on the wind speed and load), and good dynamic stability parameters.

3. Ensuring good performance by the dynamic processes due to the presence of aerodynamic damping forces arising due to the reduced blade position.

4. Reduction of the yaw propeller, providing a stable orientation to the wind, to reduce the impact on the work of wind turbine aerodynamic wake tower.

5. Protection mechanism located inside the hub, and a lack of heavy loads.

As a result, the search for sources of patent and scientific and technological information, a set of attributes that characterizes the proposed compact controller type aerodynamic speed, was not detected. Thus, the invention meets the criterion of patentability "new."

Based on a comparative analysis of the proposed technical solution to the prior art on the sources of scientific-technical and patent literature can be argued that between the set of characteristics, including distinctive, and the functions they perform and achieve goals there is not obvious causal connection. Based on the above it can be concluded that the proposed technical solution in the device should not be explicitly in the art and, therefore, meets the criteria for eligibility "inventive step".

The proposed technical solution can be used in the construction of wind turbines horizontally-axial type, and hence this solution meets the criterion "industrial applicability".

The design offers a compact regulator aerodynamic speed type illustrated by a drawing.

CD CONTROL SPEED AERODYNAMIC TYPE FOR Wind Turbine

Depicted in the drawing compact controller turns the aerodynamic type comprises a hub 1, rigidly secured to it two bearing units in which the blades 3 arranged rotatably about their axes arranged conically in relation to the propeller axis. The hub 1 propeller taken by the device, affecting the rotation of the blade 3, which consists of a guide 4 mounted on it at least two springs - less than 5 and most six stiffening is rigidly fixed to the supporting parts of the blades 3 rockers 7 connected via rods 8 with the sliding 4, the guide follower 9 resting on the spring stiffness at 5. This device is essentially a crank mechanism. Springs 5 ​​and 6 the compression regulation device is a controller 10 that defines the initial compression of the springs 5, 6 and the abutment 12, regulating the time sequential switching operation in the springs 5 ​​and 6. To prevent twisting of the pusher 9 is set relative to the guide finger 11 4.

The proposed type of aerodynamic speed control works as follows. If you exceed the propeller speed over the nominal arises aerodynamic moment about the axis of rotation of the blade 3, installed in the bearing assembly 2 with the use of rolling bearings, which allows the blade to rotate about its axis. In this case the blade 3 tends to rotate in the direction of decreasing the angle of attack and, therefore, reduce the rotational speed of the propeller. This is transmitted through the rocker 7, 8 and the pusher rod 9 on the spring 5 and 6, so that is their compression and a force opposing the rotation of the blades 3 in the feathered position. This spring included - off series, which uses a special focus 12. This arrangement allows for a predetermined law of variation of the mechanism of resistance forces on the magnitude of displacement and ensure high stability maintenance of propeller speed over a wide range of wind speeds. To improve the accuracy of control knob 10 is used, allowing to change the initial spring compression force 5, 6. To reduce the level of vibrations rods 8, the length is adjustable, which allows for aerodynamic balancing of propeller blades 3.

CLAIM

Wind wheel, characterized in that it comprises a hub fixedly mounted on it bearing assemblies which are placed blades rotatable about their axes arranged conically in relation to the propeller axis, and which are located in the hub device, affecting the rotation blade, which consists of guide mounted therein at least two springs of different rigidity arranged to sequentially off of work spring first lower stiffness, and then more rigidly fixed to the supporting parts of the blades rocking connected via rods sliding along the guide tappet resting on the spring at stiffness and compression springs regulating device.

print version
Publication date 02.02.2007gg