JP6626261B2 - Wind turbine seismic isolation device - Google Patents

Description

  The present invention relates to a seismic isolation device for a wind turbine, and more particularly to a seismic isolation device for a wind turbine that suppresses the vibration of a support frame generated when a vertical wind turbine rotates, thereby increasing the rotation efficiency of a rotor.

  Patent Documents 1 and 2 disclose vertical axis wind turbines in which rotors are arranged in a multilayer structure on a high-rise support frame.

JP 2006-118384 A JP 2006-017011 A

In the invention described in Patent Document 1, a plurality of rotors are arranged in a multilayer shape on one vertical main shaft supported by a support frame.
The invention described in Patent Document 2 also has a structure in which a plurality of rotors are arranged in a multilayer shape on one main shaft supported by a support frame, and a vertical main shaft is provided with a deflection preventing means.
In these inventions, the rotation efficiency of the rotor is high and excellent even in a light wind, and if the support frame is fixed and held in four directions by wire ropes or the like, the centrifugal force accompanying the rotation of the rotor causes the entire support frame to be held. There was vibration, it is possible to prevent the looseness of the wire rope. However, a method of suppressing the vibration of the entire support frame is about to be desired.
The present invention aims to solve this problem.

  The specific contents of the present invention are as follows.

(1) In a windmill in which a plurality of rotors are mounted in layers on one vertical main shaft of a support frame, the support frame is three-dimensionally assembled with a plurality of columns and a plurality of horizontal frames arranged vertically . The horizontal frame body is formed in a rectangular shape with vertical and horizontal outer frame bars in a plan view, and a bearing is horizontally mounted through a plurality of supporting bars at the inner center thereof, and elastically attached to a central base of the support frame member. A vertical main shaft erected on the upper part of the generator arranged via the body is supported by bearings supported by the horizontal frame, and a lowermost basic horizontal frame of the horizontal frames is An elastic body for seismic isolation provided at the tip of the supporting middle bar is brought into contact with the upper surface of the generator so as to suppress the roll of the generator , and at least in the middle of the height of the support frame. horizontal frame is a MenShinyoko frame,該免Shinyoko frame body, the inner center of the outer frame crosspieces are assembled in a square, the isolator Fixed via a plurality of support in bars, the seismic isolation device, the inside of the directly support during crosspiece fixed annular outer frame, via the outer elastic body supporting the annular in frame, annular in frame to support the annular frame via the inner elastic body inward, the center portion of the annular frame, isolator windmill bearings supporting the height intermediate the longitudinal main shaft is disposed.

(2) the MenShinyoko frame body, between the annular frame and the annular in frame, arranged inside the elastic body is higher resilience than the outer elastic bodies in two stages apart vertically, annular in frame and the annular An outer elastic body having lower resilience than the inner elastic body is arranged between the outer frames , and a pair of upper and lower bearings are fitted inside the annular inner frame at the same positions corresponding to the upper and lower inner elastic bodies , respectively. The seismic isolation device for a windmill according to the above (1), which is mounted.

(3) In the seismic isolation horizontal frame , the upper and lower inner elastic bodies between the annular inner frame and the annular middle frame have inner and outer doubles, and the inscribed elastic body has a higher resilience than the circumscribed elastic body. (2) The seismic isolation device for a wind turbine according to (2), wherein the elastic body is a high elastic body , the outer elastic body is double inner and outer , and the inscribed elastic body is an elastic body having higher resilience than the circumscribed elastic body .

  According to the present invention, the following effects can be obtained.

Wherein in the invention described in (1), at least intermediate MenShinyoko frame vertically is disposed in the support frame, via an outer elastic body inside the annular outer frame of the isolator ring The middle frame is supported, the annular inner frame is supported inside through the inner elastic body, and the bearing that supports the vertical main shaft is arranged at the center of the inner frame. be vibrated by rotation, to absorb the dynamic internal elastic body vibration, because more external elastic body absorbs vibration, or the vibration support frame of the windmill supporting the seismic isolation device, a low-frequency There is no danger of occurrence, and stable rotation of the rotor is maintained.
Further, the inner elastic member and the outer elastic member isolator in MenShinyoko frame, since the resilience different from each other, the inside and outside of resilience difference, to absorb vibration of the vertical spindle effectively be able to.

In the invention according to (2), when the bearing portion supported by the inner and outer elastic bodies of the seismic isolation device in MenShinyoko frame body since it is disposed in two upper and lower stages, the vertical main shaft has vibration, bearing portions of the upper and lower are moved to the respective opposite direction, to return to the original in the reaction, vibration is easily absorbed.

In the invention described in the above (3), the outer elastic body sandwiched between the annular inner frame and the annular outer frame of the seismic isolation device in the seismic isolation horizontal frame has two inner and outer layers, and the inner inscribed outer elastic body is there because as a high resilience, the roll vibration of the vertical spindle, the resilience of different inside and outside of the elastic body, can be a good vibration absorption efficiency.

It is a top view of Example 1 of the seismic isolation device of the present invention. It is a front view of FIG. It is a top view of a horizontal frame to which the seismic isolation device of the present invention is attached. It is a front view of a windmill using the seismic isolation device of the present invention. It is a front view of Example 2 of the seismic isolation device of the present invention.

  Hereinafter, the present invention will be described with reference to the drawings.

As shown in FIG. 1, the seismic isolation device 1, inside the annular outer frame 2, and supports the annular During frame 4 through the outer elastic member 3 such known BoShin rubber or a coil spring, and an annular in frame 4 An annular inner frame 6 is supported inside through an inner elastic body 5, and a bearing 7 is fitted at the center thereof. The outer elastic body 3 and the inner elastic body 5 preferably have different resilience from each other, and the inner elastic body 5 preferably has higher resilience than the outer elastic body 3.

As shown in FIG. 3, this seismic isolation device 1 has a central portion in a plan view of a horizontal frame body 10 formed by a vertical and horizontal outer frame rails 11 in a support frame 9 of a wind turbine erected on a base G. to, and it is fixedly held via a plurality of support in bars 11 a.
As shown in FIG. 4, the support frame 9 of the windmill is formed by assembling a plurality of horizontal frames 10 in a layered manner with a plurality of columns 12, respectively.

The vertical main shaft 8 is disposed at the center of the lower inside of the support frame 9 and is supported by the bearing 7 in each horizontal frame 10. If the bearing 7 is normally supported, the vertical main shaft 8 is vibrated by the high-speed rotation of the rotor 14, the vibration causes the vibrated transverse frame member 10 through a bearing 7, the entire support frame 9 and thus to greatly vibration.

However, in the present invention, as the second lateral frame member 10A from the bottom in FIG. 2, because of the MenShinyoko frame, even if vibrated vertically main shaft 8 is large rotor 14 is rotated at a high speed, as shown in FIG. 1, vibration of the annular frame 6 in the seismic isolation device 1 for supporting a bearing 7, by the outer elastic member 3 which is disposed inside the outer frame 2, are absorbed, MenShinyoko since the frame body 8A is difficult to vibration, also vibration supporting frame 9 is prevented.

  As shown in FIG. 4, the generator 13 is supported by a support 19 provided on a base G via an elastic body 18, and the periphery of the upper part of the generator 13 is supported by the elastic body 18 of the base horizontal frame 10B. Have been. The elastic body 18 is configured by arranging, for example, an anti-vibration rubber or a coil spring.

Thus, also the vertical main shaft 8 and vibrated by the rotation of the rotor 14, the upper portion of the vibration generator 11 is relaxed by the elastic body 18, vibration of the entire generator 13, absorbed by the lower portion of the elastic body 18 It is difficult to transmit from the base G to other areas.

  The rotor 14 is configured such that a vertically-long lift-type blade 15 (hereinafter simply referred to as a blade) having upper and lower ends formed with an inclined portion 15A inclined toward the vertical main shaft 8 is attached to the main shaft 8 via a radial support arm 16. It is formed so as to be detachably fixed to the mounting plate 17 mounted.

  The blades 15 are arranged symmetrically with respect to the vertical main shaft 8. Although the number of blades 15 is not limited, if the number is large, the following blades 15 receive turbulence generated by the preceding blade 15 during high-speed rotation, and the entire blade 15 stalls.

If the blade 15 is single, not good rotation balance relative to the longitudinal main axis 8, causing the vibration. When the rotors 14 are arranged in a multilayer shape on the vertical main shaft 8, the phases of the blades 15 are changed in a well-balanced manner so that the upper and lower blades 15 do not overlap.

  The rotors 14 are arranged in three layers in FIG. 4. However, if the number of layers increases, the speed of the airflow differs between the upper and lower portions, so that the rotational speed tends to be different between the upper and lower rotors 14. In a place where the position of the base G is high and a relatively high-speed wind blows, the three-layer arrangement of the rotors 14 enables efficient high-speed rotation.

When the upper vertical main shaft 8 shown in FIG. 4 are fixed, since the vibration in the lower part of the vertical main shaft 8 occurs at a position lower vertical spindle 8 adopts the seismic isolation device 1.
As shown in FIG. 4, a vertical main shaft 8 by vibration, even when the dynamic annular frame 6 of the seismic isolation device 1 is vibration, vibration by the elastic member 5 within which is interposed between the annular in frame 4 Movement is absorbed.

When vibration is strong, the outer elastic member 3 interposed between the annular outer frame 2 and the annular During frame 4, it is absorbed.
The entire generator 13 also, since the dynamic vibration by the lower of the elastic body 18 is absorbed, vibration of the entire support frame 9 by vibration of the vertical main shaft 8 is prevented.

FIG. 5 is a longitudinal sectional front view showing a second embodiment of the seismic isolation device. The same members as those in the previous example are denoted by the same reference numerals, and description thereof will be omitted. In the second embodiment, the annular outer frame 2, the annular middle frame ring 4, and the annular inner frame 6 are common, but the inner elastic body 5 </ b> A is arranged in two layers inside the inner elastic body 5. The resilience is different from each other. Preferably, the inscribed inner elastic body 5 </ b> A has higher resilience than the inner elastic body 5.

Thus, the vibration of the vertical main shaft 8 is absorbed by initially inscribed within the elastic body 5A, it is absorbed by the internal elastic member 5 a vibration of the residual. Further, inside the outer elastic body 3, an inscribed outer elastic body 3 </ b> A having a higher resilience than the outer elastic body 3 is doubled. Thus, vibration of the vertical main shaft 8 is absorbed 4 stepwise, very effective in vibration relaxation.
The resilience of each elastic body can be arbitrarily combined inside and outside.

In the present invention, by supporting the main shaft of the wind turbine in the vibration isolating apparatus, the deflection vibration of the spindle due to the rotation of the rotor, it is possible to absorb the vibration isolating apparatus, a wind power generation apparatus that performs high-efficiency power generation Can be obtained.

1. Seismic isolation device2. Annular outer frame 3. Outer elastic body 3A. 3. Internal and external elastic body Annular middle frame 5. Internal elastic body 5A. Inscribed inner elastic body 6. Annular inner frame 7. Bearing 8. Vertical spindle 9. Support frame
Ten. Horizontal frame
10A. Seismic isolation horizontal frame
10B. Foundation horizontal frame
11． The outer frame bar
11A. Supporting pier
12． Prop
13. Generator
14. Rotor
15． Lifting blade
15A. Inclined part
16． Support arm
17． Mounting plate
18． Elastic body
19. Support G Foundation

Claims (3)

In a windmill in which a plurality of rotors are mounted on one main shaft of a support frame in a layered manner, the support frame is three-dimensionally assembled with a plurality of columns and a plurality of horizontal frames arranged vertically .
The horizontal frame body is formed in a rectangular shape with vertical and horizontal outer frame bars in a plan view, and a bearing is horizontally mounted through a plurality of supporting bars at the inner center thereof, and elastically attached to a central base of the support frame member. A vertical main shaft erected on the upper part of the generator arranged via the body is supported by bearings supported by the horizontal frame, and a lowermost basic horizontal frame of the horizontal frames is An elastic body for seismic isolation provided at the tip of the supporting middle bar is brought into contact with the upper surface of the generator so as to suppress the roll of the generator , and at least in the middle of the height of the support frame. The horizontal frame body is a seismic isolation horizontal frame body, and the seismic isolation horizontal frame body is fixed to the center of the inside of a rectangular outer frame bar through a plurality of supporting middle bars ,
The seismic isolation device, the inside of the support in the crosspiece directly fixed annular outer frame, a circular in frame supported via the outer elastic body, the annular via the inner elastic body inside the annular during frame to support the frame, the center portion of the annular frame, isolator windmill, characterized in that the bearing supporting the height intermediate the longitudinal main shaft is disposed. The said seismic isolation horizontal frame body, between the annular inner frame and the annular middle frame, the inner elastic body having a higher resilience than the outer elastic body is arranged in two stages vertically separated from each other. An outer elastic body having a lower resilience than the inner elastic body is disposed therebetween, and a pair of upper and lower bearings are fitted inside the annular inner frame at the same positions corresponding to the upper and lower inner elastic bodies , respectively. The seismic isolation device for a windmill according to claim 1, wherein The seismic isolation horizontal frame is an elastic body in which the upper and lower inner elastic bodies between the annular inner frame and the annular middle frame are double inner and outer, and the inscribed elastic body has higher resilience than the circumscribed elastic body. The seismic isolation device for a windmill according to claim 2 , wherein the outer elastic body is also double inner and outer , and the inscribed elastic body is an elastic body having higher resilience than the circumscribed elastic body .

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