JP2008150963A - Vertical axis lift utilizing type counter-rotating wind turbine generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce vibration and noise, to upsize a wind turbine, and to eliminate danger of tower collapse, without requiring to equip a high tower, by installing a central part of a generator on the ground, by dispensing with a yaw system by utilizing a vertical axis wind turbine. <P>SOLUTION: This wind turbine generator can be enlarged without requiring the tower, by installing the generator on the ground, by reducing the noise and an energy loss by omitting a speed increasing gear by coping by a multipolar generator, without requiring the yaw system due to the vertical axis wind turbine, and can provide relatively high speed rotation by counter-rotating blades, and can highly efficiently generate electric power by directly coupling a stator 3 and a rotor 13 of the multipolar generator with the respective rotary blades, and can provide a high peripheral speed by upsizing the wind turbine, and can inexpensively and highly efficiently generate the electric power. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to wind power generation that converts wind power into rotational energy and becomes power in the form of energy.

  Conventional devices that generate wind energy by converting wind power into rotational energy are wind turbines that use high-speed lift and can be either horizontal-axis propeller type or vertical-axis gyro and Darius type wind turbines. In most cases, it is a horizontal axis propeller type windmill.

  However, wind turbines use the nature of the wind to increase the size of the wind turbines, but the propeller type is equipped with a generator at the top of the tower and a speed increaser. In order to introduce the yaw system, the center of gravity exists at the top, and the dangers such as collapse of the tower or breakage of the blade increase, and the enlargement has reached the limit.

  On the other hand, the vertical axis wind turbine absorbs vibration and noise because the central shaft and the generator are installed on the ground, so noise pollution is low, and since it is non-oriented, there is no need for azimuth control and it is possible to increase the size.

  A vertical-axis wind turbine can be combined with a multi-pole synchronous generator or an asynchronous generator that does not require a gearbox to introduce a large generator at a variable speed. It is possible to do.

  In the conventional counter-rotating wind turbine, in the horizontal axis wind turbine, the blades are installed at the front and rear, and 60% of the wind energy is consumed in the front wing, so the expected energy cannot be obtained in the rear wing. In a vertical axis windmill, a method of obtaining relatively high speed rotation by installing the windmill up and down on the same axis and rotating them in opposite directions is considered, but this method installs two windmills. It is not as efficient as it is.

JP 58-185980 Special table flat 10-504366

  In general, lift-driven horizontal axis wind turbines used for power generation require azimuth control, and in the case of large wind turbines, a yaw system is introduced or a down-blade method is available. However, if a yaw system is introduced, the weight increases. However, if the down blade system is introduced, the fatigue of the blade increases due to the Karman vortex of the tower that supports the wind turbine, and there is a high risk of blade damage.

To obtain a high peripheral speed ratio and increase the size for the purpose of efficiently utilizing wind power, in the case of a horizontal axis wind turbine, if a speed increaser is introduced or a multipolar generator is supported, but a speed increaser is introduced, The mechanical noise is large, the energy loss is large, and the weight increases.
In addition, if a multipolar generator is introduced, the generator will become large, and the weight will also increase, so there is a danger of tower collapse in a horizontal axis windmill with the center of gravity at the top of the tower, and the enlargement has reached the limit.

  Since the blades of a horizontal axis wind turbine rotate with one side support, the speeds of the blade tip and base are different, the design is complicated, the manufacturing cost is high, and the risk of breakage is high.

  Since the wind turbine utilizing lift is difficult to start, wiring for introducing the induction power is necessary for the purpose of starting with the induction power.

The conventional counter-rotating wind turbine device is a method of installing two wind turbines at the front and rear in a horizontal axis wind turbine and rotating them counterclockwise, but this method consumes most of the energy at the front wing, and the rear The wings do not provide the expected energy.
On the other hand, in the vertical axis reversal wind turbine, two wind turbines are installed on the same axis up and down, and each of them is rotated in the opposite direction to try to obtain relatively high-efficiency power generation. The wind receiving area that is doubled in the same way as the method of installing separately is required, so it cannot be said to be highly efficient power generation.

  Horizontal axis windmills require azimuth control, whereas vertical axis windmills are omnidirectional and do not require azimuth control, so no yaw system is required.

  By using a multi-pole generator for a vertical axis wind turbine, the gearbox can be omitted, and by installing the generator on the ground, vibration and noise can be absorbed, and the wind turbine can be made larger to cope with the increase in weight. High peripheral speed can be obtained.

  The blade of the vertical axis wind turbine is strong because the upper and lower points are fixed and rotated by the arm, the blade is less fatigued, therefore the risk of blade breakage is reduced and the design is simple, and the tower that supports the full weight of the rotating part It is unnecessary and can avoid the danger of collapse.

  The contra-rotating wind turbine of the present invention is a vertical axis wind turbine utilizing lift, and the gyro-type or Darius-type wind turbine rotor blades are installed on the outside and inside, utilizing a uniform flow within the same axis and the same wind receiving area, and at the same time Efficient high-speed rotation can be obtained by rotating in the opposite direction.

  The stator of the generator is installed in a rotatable state on the lower arm of the outer rotor and directly connected to it, and the generator rotor is directly connected to the lower arm of the inner rotor. Therefore, it is possible to eliminate the gearbox by making the generator multi-polar, thereby eliminating mechanical noise and energy loss.

  A difficult problem with a vertical axis wind turbine is the startability. In a gyro type wind turbine, an auxiliary wing similar to an airplane wing flap is installed on the support plate (wing) of the blade arm, or the arm (support wing) By changing the angle, it can be installed in a state where the drag can be used and it can be started easily.

  By using a vertical axis windmill, the yaw system is no longer necessary, and by installing the center of the generator on the ground, there is no need to install a high tower, reducing vibration and noise, and allowing the windmill to be enlarged, It is possible to eliminate the danger of tower collapse.

  Installation of generators on the ground makes it possible to increase the size, significantly reducing construction costs, facilitating maintenance management, and greatly reducing power supply costs.

  By making the counter-rotating wind turbine correspond to the multi-pole synchronous power generation system, it is possible to obtain a relatively high speed rotation, omitting the gearbox, eliminating energy loss, and efficient power generation. In addition to being possible, it is freed from machine noise generated by the gearbox.

  Propeller type wind turbines are supported on one side, so the blade root and tip have different peripheral speeds, and the design is complicated and causes blade damage. The design is small, the manufacturing cost is low, and the durability is high.

  Large wind turbines using lift are difficult to start up, so they are started by inductive power.However, in the gyro-type wind turbine of the present invention, auxiliary blades similar to airplane blade flaps are installed on the rotor blades or the angle of the arms is changed. It is possible to make the start-up easier by utilizing the drag.

In startup, it is possible to facilitate startup by utilizing lift and drag in the blade rotation process. When the blade rotation (peripheral speed) becomes faster than the wind speed, only lift is used.

  An embodiment of the present invention will be described in detail with reference to FIGS.

Fig. 1 is a front view of a vertical axis gyro-type counter rotating wind turbine and a multi-pole synchronous generator. The arms of 2A and 12A can be flapped or angle-changed for the purpose of facilitating start-up, and lift force is utilized in the head wind. And in the tailwind, it is a device that can use the drag, and in the state where the peripheral speed exceeds the wind speed, the device that can always use the lift.

  The rotary blades (1, 11) are constituted by NACA type blades for the purpose of effectively utilizing lift, and the angle of attack is preferably inclined by about 13 ° to 15 °.

  Reference numeral 1 denotes an outer rotary blade, which is supported by the upper and lower arms 2A and 2B and rotates around a rotation axis of 5.

  Since the stator of the multipole synchronous generator is directly connected to the upper part of the outer rotor blade support plate 2B in a rotatable state, the stator rotates as the 2B rotates.

  Reference numeral 11 denotes an inner rotor blade, which is supported by upper and lower arms 12A and 12B and rotates around 5 on the opposite side of the outer rotor blade.

  The rotor of the multipolar synchronous generator is directly connected to the lower part of the inner rotor blade support plate 12B and rotates together with 12B.

  The outer rotor blade and the inner rotor blade rotate in opposite directions with a uniform flow, thereby enabling efficient power generation.

  It is also possible to install rotating wheels and rails for the wheels under the outer rotor blade support plate.

  The inner rotor blade is fixed with a branch line to prevent the blade from deforming.

  In order to prevent the windmill from collapsing, support columns 9 are installed in three or four directions, and the rotating shaft is supported by 10 branch lines.

  FIG. 2 is a plan view of FIG.

  FIG. 3 shows an automatic device for facilitating activation of the rotor blade (an example in the case of changing the angle).

Front view of a counter rotating wind turbine and a multipolar synchronous generator showing an embodiment of the present invention Planes of counter-rotating wind turbine and multi-pole synchronous generator Top view of wind turbine rotor blade arm (support blade) and flap Cross section of wind turbine rotor blade arm and flap (in case of head wind) Cross section of windmill rotor blade and flap (in case of tailwind)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer rotary blade 2A Outer rotary blade upper support blade 2B Outer rotary blade lower support blade 3 Multipole synchronous generator stator 4 Stator cover 5 Rotating shaft 6A Outer rotary blade upper support bearing 6B Outer rotary blade lower support bearing 7 Outer rotation Wing support wheel 8 Rail 9 Post 10 Branch line (for post)
11 Inner rotor blade 12A Inner rotor blade upper support blade 12B Inner rotor blade lower support blade 13 Multipolar generator rotor 14 Rotor cover 16A Inner rotor upper support bearing 16B Inner rotor lower support bearing 17 Inner rotor blade branch line 21 Outside Rotating blade flap 21A Rotating blade flap rotating shaft 21B Rotating blade flap rotation guide fulcrum 21C Rotating blade flap guide groove 22 Inner rotating blade flap

Claims (5)

  Efficient power generation by using a vertical-axis wind turbine and a gyro-type wind turbine or a Darius-type wind turbine that has double-sided rotor blades on the outside and inside and sets the blade orientation to rotate in opposite directions. A device characterized in that   The rotor blade in the gyro-type wind turbine according to claim 1 is a NACA-type blade and is composed of upper and lower arms (support blades) and a rotating shaft, an inner rotating blade is installed around the rotating shaft, and opposite to the inner rotating blade. A device characterized by installing a rotating outer rotor blade and simultaneously rotating it in the opposite direction.   2. The apparatus according to claim 1, wherein two wings of long and short are installed on the same axis on the outer side and the inner side, and the wings are changed in direction so as to rotate counterclockwise.   In the case of the gyro-type windmill according to claim 2, by installing a wing similar to the flap of an airplane wing on an arm (support wing) or by installing it in a state in which the angle of the wing can be changed, Device characterized by facilitating activation.   The lower arm of the outer rotor blade according to claim 1 is directly connected to the stator of the multipolar generator (installed in a rotatable state), and the rotor of the multipolar generator is connected to the lower arm of the inner rotor blade. A device that is directly connected and rotates the stator and the rotor in the opposite direction to enable efficient power generation.

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