CA1111351A - Wind turbine dampers - Google Patents
Wind turbine dampersInfo
- Publication number
- CA1111351A CA1111351A CA326,852A CA326852A CA1111351A CA 1111351 A CA1111351 A CA 1111351A CA 326852 A CA326852 A CA 326852A CA 1111351 A CA1111351 A CA 1111351A
- Authority
- CA
- Canada
- Prior art keywords
- guys
- anchored
- guy
- dampers
- combination
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 238000013016 damping Methods 0.000 description 3
- 241000321453 Paranthias colonus Species 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/21—Rotors for wind turbines
- F05B2240/211—Rotors for wind turbines with vertical axis
- F05B2240/212—Rotors for wind turbines with vertical axis of the Darrieus type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/91—Mounting on supporting structures or systems on a stationary structure
- F05B2240/912—Mounting on supporting structures or systems on a stationary structure on a tower
- F05B2240/9121—Mounting on supporting structures or systems on a stationary structure on a tower on a lattice tower
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
A B S T R A C T
A wind turbine is provided, incorporating guy wires for support, the improvement comprising single or double acting dampers operating in single or multiple planes, applied to the guy wires for the absorption of energy from the guys that are cuased to vibrate laterally in any plane under the influence of fluctuating loads imparted to them by the wind turbine.
A wind turbine is provided, incorporating guy wires for support, the improvement comprising single or double acting dampers operating in single or multiple planes, applied to the guy wires for the absorption of energy from the guys that are cuased to vibrate laterally in any plane under the influence of fluctuating loads imparted to them by the wind turbine.
Description
3S ~
1 FIELD OF INVENT _ N
This invention relates to vertical axis wind turbines and particularly supports therefor.
BACKGROUND OF THE INVENTION
Vertical axis wind turbines require guy wires for their support and continued support during operation. Particularly, the guys must withstand fluctuating loads applied thereto--the severity and disposition of the fluct-uating loads dependent upon a number of parameters, including the operating speed of the rotor or rotors, temperature, wind speed, guy tension, and accumulation of ice (where existing). blhile attempts to overcome the problem of fluctuating loads have been made, no one proposal has been entirely satisfactory.
Particularly, extremely high tensions have been applied to the guys (in the order of in excess of 16,000 pounds by Sandia Laboratories, Albuquerque, New Mexico) to elevate the natural frequency (lst mode) of the guys above the load-ing frequency generated by the wind turbine (two(2) per revolution). However, the increased tension decreases the efficiency of the wind turbine because of increased wear and tear to, and internal friction of, the structure.
It is therefore an object of this invention, to provide an improved control for the guys on the application of fluctuating loads.
It is a further object of this invention to provide an improved control for the guys which permits the safe operation of wind turbines, atreduced guy tensions, thereby decreasing the wear and tear to, and internal friction of, the structure. For example, the wind turbine tested by Sandia Laboratories at a guy tension of 16,000 pounds can be operated at a guy tension of 5,000 pounds.
Further and other objects of the invention will be realized by those skilled in the art from the following summary of the invention and detailed description of the preferred embodiment thereof.
_UMMARY OF THE INVENTION
In accordance with one aspect of the invention, single or double -.~
~135:~
1 acting dampers (operating in single or multiple planes) are applied to the guys for supporting a wind turbine for the absorption of energy from guys that are caused to vibrate laterally in any plane under the influence of fluctuating loads, imparted to them by the wind turbine.
Preferably the dampers are secured to the guys at substantially right angles thereto.
DESCRIPTION OF THE DRAWINGS
The invention will now be illustrated with reference to the following drawings of a preferred embodiment of the invention, in which:
Figure 1 is a side elevation of a wind turbine incorporating a pre-ferred embodiment of the invention;
Figure 2 is a top view of the structure shown in Figure 1;
Figure 3 is a close-up view of part of the structure shown in Figure l;
Figure 4 is a section taken along the line 4-4 of Figure 3 looking in the direction of the arrows.
DETAILED DESCRIPTION OF THE PREFERRED EMBODI~lENT
With reference to Figure 1, there is shown 50 ~i 1 owatt vertical axis wind turbine 10 having vertical shaft 12 and rotor blades 14 and 16 secured at 20 their respective ends to vertical shaft 12, and intermediate their ends by struts 18 and 20 to vertical shaft 12 and to one another. Vertical shaft 12 is supported for rotation on tower 22 at one end and by guy wires 24, 25, 26 and 27(See Figure 2), at the other joined to coupling 28 secured to the top of shaft 12.
Guy wire 24 is anchored to the ground at 30 by anchor 32 under a tension of 3,500 pounds. Guy wires 25, 26 and 27 are anchored in the same way.
Double acting dampers 34 are applied to each of guy wires 24,25, 26 and 27 at substantially right angles thereto (See Figures 1 and 3) for absorption of energy from the guys 24, 25, 26, and 27 when they are caused to vibrate laterally 30 in any plane under the influence of fluctuating loads imparted to them by the 3S:~
.`
1 wind turbine responding to environmental conditions--rain, sleet, snow and wind.
Each of dampers 34 comprises rectangular tube 36 anchored in the ground at 38 (as shown ), telescoping into rectangular hollow tubular member 40, inner side wall a of member 40 being considerably larger than outer side b of rectangular member 36 (See Figure 4) and side c of tubular member 40 being marginally larger than outer side wall d. Tubular member 40 is in turn secured - at end 44 by ring assembly 46 welded onto the end of tubular member 40, to guy wire 24 by hook sleeve assembly 48 clamped to the guy wire at 50. ~hen guy wire 24 is caused to laterally vibrate in any direction, the internal surface of member 40 engages the outer surface of stationary member 36 absorbing vibrational energy from the guys by friction when the surfaces slide one over the other.
For example, if the guys had not been damped, in winds of 35 m.p.h., the extent of the lateral vibrational displacement from the mean position of the guy wire would be in excess of .3 meters, whereas, with the damping of the guy wire as shown, the extent of lateral vibrational displacement is less than .1 meter. Thus the tension in the guy wire is only 3,500 pounds with damping, as compared`to 14,000 pounds without damping.
As many changes could be made in the preferred embodiment of the invention without departing from the scope of the invention, it is intended that all matter contained herein be interpreted as illustrative thereof, and not in a limiting sense.
1 FIELD OF INVENT _ N
This invention relates to vertical axis wind turbines and particularly supports therefor.
BACKGROUND OF THE INVENTION
Vertical axis wind turbines require guy wires for their support and continued support during operation. Particularly, the guys must withstand fluctuating loads applied thereto--the severity and disposition of the fluct-uating loads dependent upon a number of parameters, including the operating speed of the rotor or rotors, temperature, wind speed, guy tension, and accumulation of ice (where existing). blhile attempts to overcome the problem of fluctuating loads have been made, no one proposal has been entirely satisfactory.
Particularly, extremely high tensions have been applied to the guys (in the order of in excess of 16,000 pounds by Sandia Laboratories, Albuquerque, New Mexico) to elevate the natural frequency (lst mode) of the guys above the load-ing frequency generated by the wind turbine (two(2) per revolution). However, the increased tension decreases the efficiency of the wind turbine because of increased wear and tear to, and internal friction of, the structure.
It is therefore an object of this invention, to provide an improved control for the guys on the application of fluctuating loads.
It is a further object of this invention to provide an improved control for the guys which permits the safe operation of wind turbines, atreduced guy tensions, thereby decreasing the wear and tear to, and internal friction of, the structure. For example, the wind turbine tested by Sandia Laboratories at a guy tension of 16,000 pounds can be operated at a guy tension of 5,000 pounds.
Further and other objects of the invention will be realized by those skilled in the art from the following summary of the invention and detailed description of the preferred embodiment thereof.
_UMMARY OF THE INVENTION
In accordance with one aspect of the invention, single or double -.~
~135:~
1 acting dampers (operating in single or multiple planes) are applied to the guys for supporting a wind turbine for the absorption of energy from guys that are caused to vibrate laterally in any plane under the influence of fluctuating loads, imparted to them by the wind turbine.
Preferably the dampers are secured to the guys at substantially right angles thereto.
DESCRIPTION OF THE DRAWINGS
The invention will now be illustrated with reference to the following drawings of a preferred embodiment of the invention, in which:
Figure 1 is a side elevation of a wind turbine incorporating a pre-ferred embodiment of the invention;
Figure 2 is a top view of the structure shown in Figure 1;
Figure 3 is a close-up view of part of the structure shown in Figure l;
Figure 4 is a section taken along the line 4-4 of Figure 3 looking in the direction of the arrows.
DETAILED DESCRIPTION OF THE PREFERRED EMBODI~lENT
With reference to Figure 1, there is shown 50 ~i 1 owatt vertical axis wind turbine 10 having vertical shaft 12 and rotor blades 14 and 16 secured at 20 their respective ends to vertical shaft 12, and intermediate their ends by struts 18 and 20 to vertical shaft 12 and to one another. Vertical shaft 12 is supported for rotation on tower 22 at one end and by guy wires 24, 25, 26 and 27(See Figure 2), at the other joined to coupling 28 secured to the top of shaft 12.
Guy wire 24 is anchored to the ground at 30 by anchor 32 under a tension of 3,500 pounds. Guy wires 25, 26 and 27 are anchored in the same way.
Double acting dampers 34 are applied to each of guy wires 24,25, 26 and 27 at substantially right angles thereto (See Figures 1 and 3) for absorption of energy from the guys 24, 25, 26, and 27 when they are caused to vibrate laterally 30 in any plane under the influence of fluctuating loads imparted to them by the 3S:~
.`
1 wind turbine responding to environmental conditions--rain, sleet, snow and wind.
Each of dampers 34 comprises rectangular tube 36 anchored in the ground at 38 (as shown ), telescoping into rectangular hollow tubular member 40, inner side wall a of member 40 being considerably larger than outer side b of rectangular member 36 (See Figure 4) and side c of tubular member 40 being marginally larger than outer side wall d. Tubular member 40 is in turn secured - at end 44 by ring assembly 46 welded onto the end of tubular member 40, to guy wire 24 by hook sleeve assembly 48 clamped to the guy wire at 50. ~hen guy wire 24 is caused to laterally vibrate in any direction, the internal surface of member 40 engages the outer surface of stationary member 36 absorbing vibrational energy from the guys by friction when the surfaces slide one over the other.
For example, if the guys had not been damped, in winds of 35 m.p.h., the extent of the lateral vibrational displacement from the mean position of the guy wire would be in excess of .3 meters, whereas, with the damping of the guy wire as shown, the extent of lateral vibrational displacement is less than .1 meter. Thus the tension in the guy wire is only 3,500 pounds with damping, as compared`to 14,000 pounds without damping.
As many changes could be made in the preferred embodiment of the invention without departing from the scope of the invention, it is intended that all matter contained herein be interpreted as illustrative thereof, and not in a limiting sense.
Claims (8)
CLAIMED ARE AS FOLLOWS:
1. In a wind turbine, having guy wires for supporting the wind turbine, the improvement comprising single or double acting dampers operating in single or multiple planes, applied to the guy wires for the absorption of energy from the guys that are caused to vibrate laterally in any plane under the influence of fluctuating loads imparted to them by the wind turbine.
2. The combination of Claim 1, wherein the dampers are single acting.
3. The combination of Claim 1, wherein the dampers are double acting.
4. The combination of Claim 3, wherein the double acting dampers comprisetwo members, one anchored in the ground, the other secured to the guy and fitting over the member anchored in the ground to provide a sliding frictional fit therewith when the guys are caused to vibrate to thereby absorb energy from the guys.
5. The combination of Claim 3, wherein the two members comprise tele-scoping tubular members, one member anchored in the ground, the other secured tothe guy wire, and being free to move relative to the anchored member.
6. The combination of Claim 3, wherein the two members comprise telescop-ing members, a first member being rectangular in cross-section, anchored to the ground, and a second hollow member being rectangular in cross-section secured tothe guy wire and being free to move relative to the anchored member, the length of the longer side of the rectangular cross-section of the second member securedto the guy being considerably longer than the longer side of the rectangular cross-section of the first member, anchored to the ground and the smaller side of the rectangular cross-section of the second member secured to the guy being marginally larger than the smaller side of the rectangular cross-section, of thefirst member anchored to the ground.
7. The combination of Claim 1, 2, or 3 wherein the dampers are applied tothe guys at substantially right angles to the guys.
8. The combination of Claim 4, 5 or 6 wherein the dampers are applied to the guys at substantially right angles to the guys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA326,852A CA1111351A (en) | 1979-05-03 | 1979-05-03 | Wind turbine dampers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA326,852A CA1111351A (en) | 1979-05-03 | 1979-05-03 | Wind turbine dampers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1111351A true CA1111351A (en) | 1981-10-27 |
Family
ID=4114120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA326,852A Expired CA1111351A (en) | 1979-05-03 | 1979-05-03 | Wind turbine dampers |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1111351A (en) |
-
1979
- 1979-05-03 CA CA326,852A patent/CA1111351A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |