WO2011158350A1 - Variable pitch device - Google Patents

Variable pitch device

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Publication number
WO2011158350A1
WO2011158350A1 PCT/JP2010/060230 JP2010060230W WO2011158350A1 WO 2011158350 A1 WO2011158350 A1 WO 2011158350A1 JP 2010060230 W JP2010060230 W JP 2010060230W WO 2011158350 A1 WO2011158350 A1 WO 2011158350A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
blade
pitch
member
angle
hinge
Prior art date
Application number
PCT/JP2010/060230
Other languages
French (fr)
Japanese (ja)
Inventor
直樹 柿
道代 北野
Original Assignee
A-Wingインターナショナル株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D7/00Controlling wind motors
    • F03D7/02Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022Adjusting aerodynamic properties of the blades
    • F03D7/0224Adjusting blade pitch
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
    • F05B2260/00Function
    • F05B2260/70Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/79Bearing, support or actuation arrangements therefor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • Y02E10/723Control of turbines

Abstract

A variable pitch device enables the pitch angle of blades to be automatically changed using a simple configuration. A variable pitch device (1) for a propeller type wind power generator comprises: a hub (3) to which blades (2) are attached; hinges (4) attached at a predetermined angle to the positions of the hub (3) to which the blades are attached; blades (2) attached through the hinges (4) and pivoting along the rotation axis; and a pressing member (6) for pressing toward the hub (3) the base ends of the blades (2), the base ends being located closer to the rotation axis than the hinges (4). The tips of the blades (2) pivot along the rotation axis against the pressing by the pressing member, and this increases and decreases the pitch angle of the blades (2) through the hinges (4).

Description

Variable pitch apparatus

The present invention relates to a variable pitch device particularly propeller type wind power generator relates variable pitch device.

In recent years, increased interest in wind power is a clean energy creation in terms of electrical energy creation in which there is a growing momentum to protect the Earth's environment, more secure in a more simple structure and efficient wind power power generation device has been demanded.

Conventionally, in a wind power generation apparatus of this type, a system for power generation by turning the power generator by the rotational force by utilizing the force of wind rotates the propeller blades, how within the system the power of natural wind or well absorbed control is a major issue. For example, in the case of strong wind such as typhoon rotated unnecessarily propeller blades, because some intact dangerous or lead to failure of the apparatus itself continues to operate the power generator, by varying the pitch of the propeller blades, spin down or a method for stopping were common.

However, as the mechanism for changing the pitch of the propeller blades, a complicated structure such as a hydraulic unit and the piston and the link mechanism, with the cost and required a great deal of expense for maintenance.

Therefore, having a blade tilting means for tilting the propeller blade to the drive axis, the wind turbine generator has been proposed to control the rotation is inclined blade to the drive shaft direction by the blade inclining means (see Patent Document 1.) . Further, provided with a pitch actuator for rotating the blade to the blade shaft of a wind turbine, the blade shaft held swingably flap shaft, the flap mechanism also having a spring for normally urging further blade shaft ( see Patent Document 2.).

JP-09-79127 discloses JP 2001-221145 JP

However, wind power generation apparatus proposed in Patent Document 1 is capable of use in a downwind for tilting the propeller blade to the drive shaft direction (placing the propeller blades downwind), upwind (windward side there is a problem that can not be used for the propeller blades disposed) on. Further, the flap mechanism disclosed in Patent Document 2 has a structure pitch angle of the blades to rotate within the cylindrical member for rotatably holding the blade shaft is changed, also the urging by the spring via the cylindrical member order to perform the energization, the need to carry out a fine adjustment for each blade, there is a problem that the structure is expensive becomes complicated.

The present invention has been made in view of the foregoing problems, a simple structure, and an object thereof is to provide a variable pitch device capable automatically changing the pitch angle of the blades.

Thus variable pitch apparatus of the present invention, there is provided a variable-pitch apparatus of propeller type wind power generator, a hub mounting a plurality of blades, a hinge mounted at a predetermined mounting angle the blade mounting position of the hub, the hinge attached via has a blade that swings along the rotation axis direction, and a biasing member for biasing the proximal end portion of the blade to the hub side thereof opposite to the rotation shaft side of the hinge, swings along the rotation axis direction end portion of the blade against the bias of the biasing member, the pitch angle of the blade through the hinge and wherein the increasing or decreasing.

The tip portion of the blade swings downwind direction against the bias of the biasing member by the wind pressure, characterized in that the pitch angle of the blade through the hinge is increased or decreased.
The tip portion of the blade is swung windward direction against the bias of the biasing member by a centrifugal force, characterized in that the pitch angle of the blade through the hinge is increased or decreased.

Further, the biasing member includes a spring member which is provided by winding in the axial direction of the rotation center shaft provided erected at the center of the hub, of the blade provided on one end side of the spring member and having a proximal end abutting the abutting member, and a fixing member for compressing said spring member provided on the other end of the spring member.

The mounting angle of the hinge, a predetermined angle counterclockwise hinge axis of the hinge with respect to a center line of the blade, characterized in that decreasing the pitch angle of the blades by wind pressure or centrifugal force.

The mounting angle of the hinge, the hinge shaft base of the hinge is a predetermined angle clockwise with respect to the center line of the blade, characterized in that increasing the pitch angle of the blades by wind pressure or centrifugal force.

According to the variable-pitch apparatus of the present invention, a plurality of blades mounted via a hinge on the hub, since it is biased in the hub direction further by the urging member the proximal end of the blade, the blade by wind pressure or centrifugal force tip swings along the rotation axis direction, automatically has an excellent effect that it is possible to increase or decrease the pitch angle.

The biasing member includes a spring member which is provided by winding in the axial direction of the rotary shaft which is provided standing on the center of the hub, a proximal end of the blade is provided on one end side of the spring member abutting contact member, since a fixing member for compressing provided spring member to the other end of the spring member, it is possible to urge the plurality of blades in the hub direction with a simple structure . It has an excellent effect of not selected blade mounting direction (downwind or upwind) because it can adjust the swing amount of the blade tip portion by adjusting the urging force of the advance biasing member.

Furthermore, the mounting angle of the hinge counter-clockwise, or it is possible to select and use a clockwise has the effect of selecting the decrease of the pitch angle due to the swinging of the tip of the blade.

Figure 1 is a plan view showing one embodiment of a variable pitch apparatus of the present invention. Figure 2 is a front view of FIG. Figure 3A is a diagram showing a movable state of the variable pitch apparatus of the present invention. Figure 3B is a diagram showing a movable state of the variable pitch apparatus of the present invention. Figure 4 is a graph showing the rotational speed control by variable pitch apparatus of the present invention. Figure 5 is a side view showing another embodiment of a variable pitch apparatus of the present invention. Figure 6A is a diagram showing a movable state of the variable pitch apparatus of Figure 5. 6B is a diagram showing a movable state of the variable pitch apparatus of Figure 5. Figure 7 is a graph showing the rotational speed control according to another embodiment of the variable-pitch apparatus of the present invention.

Hereinafter, a description will be given of a variable pitch apparatus of the present invention in the Examples. Incidentally, it goes without saying that the present invention is not limited to this embodiment. Figure 1 is a plan view showing an embodiment of a variable pitch apparatus of the present invention, FIG, 4 shown FIG. 2 is a front view of FIG. 1, the movable state of the variable pitch apparatus of Figure 3A and 3B present invention present invention it is a graph showing a state of controlling the blade rotation speed of the variable-pitch device.

1 to 3, professional Pera type wind power generator with a variable pitch apparatus of the present invention, showing the mechanism for reducing the pitch angle. Figure 1 is a plan view, FIG. 2 is a front view, FIG. 3A is a plan view showing a movable state of the variable pitch device, FIG. 3B is a front view showing a movable state of the variable pitch device. Variable pitch device 1 as shown in figure, a hub 3 mounting a three blades 2 of the propeller type wind power generator, and a hinge 4 attached to the hub 3, a blade 2 mounted via a hinge 4, the blade 2 the base fixing member 5 is configured to include a biasing member 6 for biasing the hub 3 directions.

As shown in FIGS. 1 and 2, the blade 2 is arranged in three equally to the rotating shaft 7 around, through the base fixing member 5 as a base end portion of the blade 2 is fixed to the hub 3, respectively, by a hinge 4 and it is rotatable. The hinge 4 is located at the proximal end of the blade 2, one end of the hinge 4 is a hinge axis 9 with respect to the central axis 8 of the blade 2 is attached to the base fixing member 5 with a predetermined angle in the counterclockwise direction, the other end side is attached to the mount 10 provided on the hub 3. As shown in FIG. 1, the base fixing member 5 along the hinge axis 9 direction of the hinge 4, toward the rotation axis 7 direction from the proximal end of the blade 2, it extends. In the present embodiment has the mounting angle of the hinge 4 and 15 degrees. In the present embodiment the pitch angle of the tip portion of the blade 2 was used in the form of 4 °.

Biasing member 6 for biasing the base fixing member 5 of the plurality of blades 2 in the hub 3 direction are provided on the upwind side of the Blanket 2. Biasing member 6 includes a spring member 12 which is provided by winding in the axial direction of the rotation center shaft 11 provided upright on the center of the hub 3, the blade 2 is provided at one end of the spring member 12 a base fixed member 5 and the contact member 13 abuts is configured to include a fixing member 14 provided on the other side to compress the spring member 12 at a predetermined urging force of the spring member 12. Fixing member 14 is regulated so as not to move upward by a nut 15 which is screwed to the male screw portion of the rotation center shaft 11. By tightening the hub 3 along the nut 15 to the male screw portion, the fixing member 14 presses the spring member 12. That is, by tightening or loosening the nut 15, can be compressed amount of the spring member 12 is displaced to adjust the biasing force of the biasing member 6.

When the tip side of the blade 2 in this configuration is subjected to wind pressure, twisted by hinges 4 with a blade 2 as shown in the state of FIG. 3B from the state of FIG. 3A is shifted downwind direction by the wind pressure, the blade 2 to the hinge shaft 9 around rotates, reduces the pitch angle.

When performing power generation by the propeller type wind power generator using a variable pitch device 1 described above, three blades 2 are rotated by wind pressure, the rotational speed increases with the wind speed increases. When the predetermined wind pressure is applied to the blade 2, the tip end of the blade 2 by displacing the lee side, the entire blade 2 is rotated in the hinge shaft 9 around the hinge 4. At this time, since the hinge axis 9 of the hinge 4 is marked with a predetermined angle with respect to the central axis 8 of the blade 2, since the twisted blade 2 with respect to the central axis 8 of the blade 2, blade 2 pitch angle It is rotated so as to decrease. Further, when the entire blade 2 is rotated to the hinge shaft 9 around, the base fixing member 5 of the blade 2 against the bias of the spring member 12, the abutting member 13 so as to separate from the hub 3, the windward side displaced. Thus, the blade 2 in accordance with the biasing force of the biasing member 6, thus starting the hinge shaft 9 around the pivot. In this manner, the blade 2 is rotated in the hinge shaft 9 around, reduces the pitch angle of the blade 2, the rotational speed of the blade 2 converge at a constant speed. Here, the pitch angle of the tip portion of the blade 2 wind speed was reduced 3 °, and the more the wind speed increases from 4 ° at 3m.

Figure 4 is a graph showing a state of controlling the blade rotation speed of the pro Pera wind power generating apparatus using a variable pitch apparatus of the present invention. In FIG. 4, A line shows an example of a fixed pitch, B line (PPC-) shows an example of decreasing the pitch angle, C line (PPC +) shows an example in which the pitch angle increases. Incidentally, the vertical axis represents the rotational speed, the horizontal axis represents the wind velocity.

As shown in FIG. 4, when the pitch angle does not change, the rotational speed of the blade increases in proportion to the wind speed as A line. Meanwhile line B indicates changes in the blade in the rotational speed by the variable pitch device shown in this embodiment. The B line, wind speed fell almost constant until 300rpm vicinity accordance approximately 400rpm next at 3m / s near the wind speed increases. Pitch angle of the tip portion of the blade in the wind speed of the 3m / s was 3 °.

C line, the mounting angle of the hinge, the hinge axis of the hinge is a predetermined angle clockwise with respect to the central axis of the blade, it shows changes in blade rotation speed by variable pitch apparatus for increasing the pitch angle of the blades by wind pressure ing. The C line, the wind speed in the same manner as described above B line becomes increased substantially constant until 400rpm vicinity accordance approximately 300rpm next at 3m / s near the wind speed increases. Pitch angle of the tip portion of the blade in the wind speed of the 3m / s is 6 °, the pitch angle increases each time the wind speed increases.

According to the variable pitch apparatus according to the present embodiment, since the hub 3 blades is attached via a hinge, is further urging the proximal end of the blade by the urging member to the hub direction, the blade by wind pressure tip swings downwind direction, can automatically increase or decrease the pitch angle.

Then according to FIGS. 5 and 6, illustrating another embodiment of a variable pitch device. Figure 5 is a side view showing another embodiment of a variable pitch apparatus of the present invention, FIGS. 6A and 6B is a perspective view showing a movable state of the variable pitch device. As shown, variable pitch device 21 of this embodiment is intended to be used in the pro Pera type wind power generator provided with a blade 22 downwind direction. Variable pitch device 21, in a state in which the blade 22 is perpendicular to the direction of about 15 ° inclined to the rotation axis 23, is attached to the hub 25 via a hinge 24. Variable pitch device 21 of this embodiment, the hub 25 from the windward side, the blade 22, are arranged in order of the biasing member 28. The mounting structure of the blade 22 and the hub 25, and with respect to the mounting structure of the biasing member 28 is the same as in Example 1 and a description thereof will be omitted. Further, it described in example pitch angle of the blades 22 is reduced by a centrifugal force in the present embodiment.

6A and 6B pro Pera type wind power generator having a variable pitch device before the wind of the present invention, showing a state in which the blade 22 is pitch angle of the blades 22 is changed according to the wind velocity to rotate there. Figure 6A shows a prior change, and FIG. 6B shows a post-change. When the blade 22 is subjected to wind a predetermined wind speed, rotate around the rotation shaft 23, the centrifugal force is generated to the blade 22. As shown in FIG. 6B, by centrifugal force, the tip side of the blade 22 by displacing the windward side, the entire blade 22 is rotated on the hinge shaft 27 about the hinge 24. At this time, since the hinge shaft 27 of the hinge 24 is marked with a predetermined angle with respect to the central axis (not shown) of the blade 22, since the twisted blade 22 with respect to the central axis of the blade 22, the blade 22 is rotated so that the pitch angle is reduced. Further, when the entire blade 22 is pivoted to the hinge shaft 27 around the base end portion of the blade 22 against the bias of the spring member 26 is displaced to the leeward side. Thus, the blade 22, in accordance with the biasing force of the biasing member 28 will start the hinge shaft 27 around the pivot. In this manner, the blade 22 is rotated in the hinge shaft 27 about the pitch angle of the blades 22 is reduced, the rotational speed of the blade 22 is substantially constant value.

Figure 7 is a graph showing a state of controlling the blade rotation speed of the pro Pera wind power generating apparatus using a variable pitch apparatus of the present invention. In FIG 7, A line shows an example of a fixed pitch, line B · C line · D line shows an example of decreasing the pitch angle, the strength of the spring material is D-line, C-line, strong in the order of B line Become. Incidentally, the vertical axis represents the rotational speed, the horizontal axis represents the wind velocity.

As shown in FIG. 7, when the pitch angle does not change the rotation speed of the blades is increased in proportion to the wind speed as line A. Meanwhile B-line, C-line, D line shows the change in the rotational speed of the blade by the variable pitch apparatus described above, for example, about 300rpm next in wind speed 3m / s near the D line, the wind speed at 5 m / s near It was about 350rpm. The amount of pitch change angle of the blade tip portion of the wind speed 5 m / s (reduction) was about 7 °. In the present embodiment has performed with the example where the pitch angle of the blades is reduced, it may be configured to have a pitch angle increases is of course. To increase the pitch angle, the mounting angle of the hinge, Figure 5 hinge axis with respect to the central axis of the blade may be at a predetermined angle opposite around the variable pitch device shown in FIGS. 6A and 6B.

Or variable pitch apparatus according to the present invention includes a hub mounting a plurality of blades, a hinge mounted at a predetermined angle to the blade mounting position of the hub, attached via the hinge, along the rotation axis direction by wind pressure a blade swings, since the base end portion of the blade was composed of a biasing member for biasing the hub direction, a simple structure, to provide a variable pitch device capable automatically changing the pitch angle of the blade can. Furthermore, it also provides a variable pitch device capable automatically changing the pitch angle by a centrifugal force due to rotation of the blades.

In Example 1 and Example 2 described above, by tightening or loosening the hub along the nut to the male threaded portion, by displacing the compression amount of the spring member to adjust the biasing force of the biasing member It has been described, but the invention is not limited to this case. For example, the amount of compression of the spring member 12 or can be displaced steplessly by exchanging the spring member itself, configured to adjust the biasing force by tightening or loosening with the fixing member itself to the nut it may be.
In Example 1 and Example 2 described above, the biasing member has been described a case where biasing the base fixing member as a base end portion of the blade is not limited to this case. For example, to form a base fixing member and the blade integrally, the biasing member may constitute the base fixing member that is formed integrally with the blade so as to urge the hub direction. Further, omitting the base fixing member extends one end of the hinge to the biasing member, the biasing member may be configured to press a portion of one end of the hinge hub direction, in this case, the hinge one end is the proximal end portion of the blade.

Blade mounting direction can be used in any of the downwind or upwind propeller type wind power generator.

Claims (6)

  1. A variable-pitch apparatus of propeller-type wind power generator,
    And the hub mounting a plurality of blades,
    A hinge mounted at a predetermined mounting angle the blade mounting position of the hub,
    Attached via the hinge, and the blade that swings along the rotation axis direction,
    And a biasing member for biasing the proximal end portion of the blade located on the rotation axis side of the hinge to the hub direction,
    Variable pitch and wherein the tip portion of the blade is swung along the rotation axis direction against the bias of the biasing member, the pitch angle of the blade through the hinge is increased or decreased.
  2. Tip of the blade swings downwind direction against the bias of the biasing member by the wind pressure, according to claim 1, the pitch angle of the blade through the hinge and wherein the increasing or decreasing variable pitch devices.
  3. Tip of the blade is swung windward direction against the urging of said biasing members by centrifugal force, to claim 1 where the pitch angle of the blades via said hinge characterized in that the increase or decrease variable pitch apparatus according.
  4. Wherein the biasing member,
    A spring member which is provided by winding in the axial direction of the rotation center shaft provided erected at the center of the hub,
    A contact member provided on one end side abuts a proximal end of said blade of said spring member,
    Variable pitch apparatus according to claim 1, characterized in that it comprises a fixing member for compressing said spring member provided on the other end of the spring member.
  5. Mounting angle of the hinge, according to claim 1 hinge axis of said hinge and counterclockwise predetermined angle with respect to a center line of the blade, characterized in that reducing the pitch angle of the blades by wind pressure or centrifugal force variable pitch apparatus according to.
  6. Mounting angle of said hinge, the hinge axis of the hinge is a predetermined angle clockwise with respect to a center line of the blade, to claim 1, characterized in that increasing the pitch angle of the blades by wind pressure or centrifugal force variable pitch apparatus according.
PCT/JP2010/060230 2010-06-16 2010-06-16 Variable pitch device WO2011158350A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/060230 WO2011158350A1 (en) 2010-06-16 2010-06-16 Variable pitch device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/060230 WO2011158350A1 (en) 2010-06-16 2010-06-16 Variable pitch device

Publications (1)

Publication Number Publication Date
WO2011158350A1 true true WO2011158350A1 (en) 2011-12-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/060230 WO2011158350A1 (en) 2010-06-16 2010-06-16 Variable pitch device

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2054383A (en) * 1936-03-30 1936-09-15 Ludewig Hercel Joseph Wind power apparatus
JPS253964B1 (en) * 1948-09-30 1950-11-20
US4443154A (en) * 1979-08-27 1984-04-17 Randolph Arthur J Windmill tower shadow eliminator
JPH0434466U (en) * 1990-07-17 1992-03-23

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2054383A (en) * 1936-03-30 1936-09-15 Ludewig Hercel Joseph Wind power apparatus
JPS253964B1 (en) * 1948-09-30 1950-11-20
US4443154A (en) * 1979-08-27 1984-04-17 Randolph Arthur J Windmill tower shadow eliminator
JPH0434466U (en) * 1990-07-17 1992-03-23

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