CA1124181A - Rotor for converting the energy of natural wind into usable mechanical energy - Google Patents
Rotor for converting the energy of natural wind into usable mechanical energyInfo
- Publication number
- CA1124181A CA1124181A CA348,964A CA348964A CA1124181A CA 1124181 A CA1124181 A CA 1124181A CA 348964 A CA348964 A CA 348964A CA 1124181 A CA1124181 A CA 1124181A
- Authority
- CA
- Canada
- Prior art keywords
- blades
- rotor assembly
- assembly according
- rotor
- axes
- 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
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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/02—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor having a plurality of rotors
-
- 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
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Abstract
Abstract of the Disclosure:
Rotor assembly for converting the energy of natural wind into usable mechanical energy, including at least two elongated curved blades being rotatable about given axes, the blades being helically twisted about the axes.
Rotor assembly for converting the energy of natural wind into usable mechanical energy, including at least two elongated curved blades being rotatable about given axes, the blades being helically twisted about the axes.
Description
The lnvention relates t,o a rotor f'or converting the energy of natural win~ into usable mechanical energy, including at least two elongated curved blades whlch are preferably opposltely disposed on the axis of rotation of the rotor~
Rotors of this type have been known for a long tlme under the name of "Sàvonius Rotors". In these rotors the individual blades are disposed in such a way that they extend parallel to the axis of rotation. With these rotors the full wind power is transmitted if the ~lades are positioned transversely to the direction of the wind, and theoretically no wind power ls transmitted (especially in the case of two-blade rotors) if the blades are positioned in the direction of the wind. This continuous alter-nating of' the two extreme wind power transmission values that is experienced when these rotors rotate~ leads to jerky irregular running~ which causes vibrations to be transmitted to the tower on which the rotors are supported, With higher wind velocities~
these vibrations can be so considerable that a special construction o~ the tower is necessary.
This circumstance has had a particularly adverse affect ln wind power stations where two such rotors are disposed together on a bearing block that is rotatably supported on the tower. This rotatable arrangement is necessary when using se~eral cooperating rotors so that the plant always automatically sets itself to the -la-~.
op-timum directio~ relative to the wind. Gusts of wind and rapid changes in wind direction in this device additionally lead to a back-and-forth movement of the entire bearing block due to the alternatingly full exposure of the blades. At higher wind veloci-ties these oscillating movements are fanned up so strongly that such plants can no longer be operated economically.
It is accordingly an object of the invention to provide a rotor for converting the energy of natural wind into usable mechanical energy, which overcomes the hereinafore mentioned shortcomings of the heretofore known devices of this general type, and which on the one hand runs more uniformly and, on the other hand prevents fanning up of oscillating motions in twin operation of rotors on a rotatable bearing block.
According to the invention, this problem is solved by arranging the individual blades of the rotor helically twisted about the axis of rotation.
With the foregoing and other objects in view there is provided, in accordance with the invention, a rotor assembly for converting the energy of natural wind into usable mechanical energy, comprising at least two elongated curved blades being rotatable about given axes, the blades being helically twisted about the axes, and each of the blades having portions thereof inserted between portions of the other blade.
In accordance with a preferred feature there is provided an axis of rotation of the rotor, the blades being oppositely disposed about the axis of rotation.
In this way, the blades are never perpendicular to the direction of the wind but are always at somewhat of an angle so that part of the wind stream is deflected without effect. The blades are not struck by the full impact of the instantaneous wind force. In addition, in the arrangement according to the invention, if a blade emerges from the wind a new blade is already partially exposed to the wind. Specifically, with optimum con-struction, one blade leaves the wind to the extent to which the other blade ~3 enters the wind stream. This ensures quiet running of the rotor, and at the same time the bearing block is prevented Erom oscillating i:E such rotors are operated as twin rotors.
The blacles may be formed flS a shaped or molded part.
In order to match the rated power of the wind power station to the respective demand, the shaped parts may be stackable together into one unit.
This also facilitates transportation of the rotor to its desti.nation, especially in the case of larger rotors. The shaped parts are transported individually to the destination and are only assembled there to make up the required size.
The shaped parts may be formed of plastic.
Means may be provided for synchronizing rotation of the blades.
Further means may be provided for rotating the alignment of the blades of the rotor in relation to each other.
The ro*ating means may include two V-shaped brackets for supporting two of the blades and a bearing block for supporting the brackets.
The synchronizing means may include a pulley attached to each of two of the blades and a belt for rotating the blades in opposite directions.
Finally, the blades may describe overlapping paths.
Although the invention is illustrated and described herein as em-bodied in a rotor for converting the energy of natural wind into usable mechanical energy, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The construction and method of operation of the invention) however~
together with additional objects and advantages thereof will be best under-stood from the following description of specific embodiments when read in connection with the single figure of the drawing which is a diagrammatic perspective view of an embodiment of a rotor according to the invention.
Referring now to the single figure of the drawing, it is seen that two rotors 1, 1' according to the invention, working in twin operation, are disposed on a bearing block ~, which is rotatably or slewably supported about the tower or turret 2. Each rotor includes a rotating shaft 4, 4', having two blades 5 and 6 disposed thereon. The two blades 5 and 6 are each made of a series of shaped parts 7. The si~e of the rotors and thus the power output of the wind power station can be determined by the number of -the shaped parts 7 which can be put together. In order to assume synchronous running, if the rotors 1 are used in twin operation, the shaped parts 7 are coupled to each other by a mechanical transmission 8. The blades 5 and 6 of the rotors 1 are helically twisted about the axes of rotation 4, 4'. In order to achieve the desired helical shape of the blades 5 and 6, each shaped part 7 is already twisted accordingly, depending on the number of shaped parts 7 to be put together.
In a rotor which includes four axially adjacent shaped parts 7 and a total twist of 90, for instance, the twist of one shaped part 7 is 22.5.
Due to the helical twist, only a part of each of the individual blades 5 and 6 is subjected to the wind in any position of the rotor 1.
Because the wind power is thus taken up continuously by parts of the blades 5 and 6 during the rotation of the rotor, jerky running o-f the rotors 1, 1' due to the alternation of full absorption of the wind power and minimum absorption, common with the known rotors, is avoided.
Rotors of this type have been known for a long tlme under the name of "Sàvonius Rotors". In these rotors the individual blades are disposed in such a way that they extend parallel to the axis of rotation. With these rotors the full wind power is transmitted if the ~lades are positioned transversely to the direction of the wind, and theoretically no wind power ls transmitted (especially in the case of two-blade rotors) if the blades are positioned in the direction of the wind. This continuous alter-nating of' the two extreme wind power transmission values that is experienced when these rotors rotate~ leads to jerky irregular running~ which causes vibrations to be transmitted to the tower on which the rotors are supported, With higher wind velocities~
these vibrations can be so considerable that a special construction o~ the tower is necessary.
This circumstance has had a particularly adverse affect ln wind power stations where two such rotors are disposed together on a bearing block that is rotatably supported on the tower. This rotatable arrangement is necessary when using se~eral cooperating rotors so that the plant always automatically sets itself to the -la-~.
op-timum directio~ relative to the wind. Gusts of wind and rapid changes in wind direction in this device additionally lead to a back-and-forth movement of the entire bearing block due to the alternatingly full exposure of the blades. At higher wind veloci-ties these oscillating movements are fanned up so strongly that such plants can no longer be operated economically.
It is accordingly an object of the invention to provide a rotor for converting the energy of natural wind into usable mechanical energy, which overcomes the hereinafore mentioned shortcomings of the heretofore known devices of this general type, and which on the one hand runs more uniformly and, on the other hand prevents fanning up of oscillating motions in twin operation of rotors on a rotatable bearing block.
According to the invention, this problem is solved by arranging the individual blades of the rotor helically twisted about the axis of rotation.
With the foregoing and other objects in view there is provided, in accordance with the invention, a rotor assembly for converting the energy of natural wind into usable mechanical energy, comprising at least two elongated curved blades being rotatable about given axes, the blades being helically twisted about the axes, and each of the blades having portions thereof inserted between portions of the other blade.
In accordance with a preferred feature there is provided an axis of rotation of the rotor, the blades being oppositely disposed about the axis of rotation.
In this way, the blades are never perpendicular to the direction of the wind but are always at somewhat of an angle so that part of the wind stream is deflected without effect. The blades are not struck by the full impact of the instantaneous wind force. In addition, in the arrangement according to the invention, if a blade emerges from the wind a new blade is already partially exposed to the wind. Specifically, with optimum con-struction, one blade leaves the wind to the extent to which the other blade ~3 enters the wind stream. This ensures quiet running of the rotor, and at the same time the bearing block is prevented Erom oscillating i:E such rotors are operated as twin rotors.
The blacles may be formed flS a shaped or molded part.
In order to match the rated power of the wind power station to the respective demand, the shaped parts may be stackable together into one unit.
This also facilitates transportation of the rotor to its desti.nation, especially in the case of larger rotors. The shaped parts are transported individually to the destination and are only assembled there to make up the required size.
The shaped parts may be formed of plastic.
Means may be provided for synchronizing rotation of the blades.
Further means may be provided for rotating the alignment of the blades of the rotor in relation to each other.
The ro*ating means may include two V-shaped brackets for supporting two of the blades and a bearing block for supporting the brackets.
The synchronizing means may include a pulley attached to each of two of the blades and a belt for rotating the blades in opposite directions.
Finally, the blades may describe overlapping paths.
Although the invention is illustrated and described herein as em-bodied in a rotor for converting the energy of natural wind into usable mechanical energy, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The construction and method of operation of the invention) however~
together with additional objects and advantages thereof will be best under-stood from the following description of specific embodiments when read in connection with the single figure of the drawing which is a diagrammatic perspective view of an embodiment of a rotor according to the invention.
Referring now to the single figure of the drawing, it is seen that two rotors 1, 1' according to the invention, working in twin operation, are disposed on a bearing block ~, which is rotatably or slewably supported about the tower or turret 2. Each rotor includes a rotating shaft 4, 4', having two blades 5 and 6 disposed thereon. The two blades 5 and 6 are each made of a series of shaped parts 7. The si~e of the rotors and thus the power output of the wind power station can be determined by the number of -the shaped parts 7 which can be put together. In order to assume synchronous running, if the rotors 1 are used in twin operation, the shaped parts 7 are coupled to each other by a mechanical transmission 8. The blades 5 and 6 of the rotors 1 are helically twisted about the axes of rotation 4, 4'. In order to achieve the desired helical shape of the blades 5 and 6, each shaped part 7 is already twisted accordingly, depending on the number of shaped parts 7 to be put together.
In a rotor which includes four axially adjacent shaped parts 7 and a total twist of 90, for instance, the twist of one shaped part 7 is 22.5.
Due to the helical twist, only a part of each of the individual blades 5 and 6 is subjected to the wind in any position of the rotor 1.
Because the wind power is thus taken up continuously by parts of the blades 5 and 6 during the rotation of the rotor, jerky running o-f the rotors 1, 1' due to the alternation of full absorption of the wind power and minimum absorption, common with the known rotors, is avoided.
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Rotor assembly for converting the energy of natural wind into usable mechanical energy, comprising at least two elongated curved blades being rotatable about given axes, said blades being helically twisted about said axes, and each of said blades having portions thereof being inserted between portions of the other of said blades.
2. Rotor assembly according to claim 1, wherein each two blades form a rotor including axes of rotation of the rotors being coextensive with the axes of said blades, said blades being oppositely disposed about said axes of rotation of the rotors.
3. Rotor assembly according to claim 1, wherein each of said blades is a separate shaped part.
4. Rotor assembly according to claim 3, wherein said shaped parts are shaped so as to be stackable together when disassembled.
5. Rotor assembly according to claim 4, wherein said shaped parts are formed of plastic.
6. Rotor assembly according to claim 1, including means for synchronizing rotation of said blades.
7. Rotor assembly according to claim 1, including means for rotating the alignment of the blades of the rotor in relation to each other.
8. Rotor assembly according to claim 7, wherein said rotating means includes two V-shaped brackets for supporting two of said blades and a bearing block for supporting said brackets.
9. Rotor assembly according to claim 6, wherein said syn-chronizing means includes a pulley attached to each of two of said blades and a belt for rotating said blades in opposite directions.
10. Rotor assembly according to claim 1, wherein said blades describe at least partially overlapping paths.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792913290 DE2913290A1 (en) | 1979-04-03 | 1979-04-03 | ROTOR FOR CONVERTING THE ENERGY OF NATURAL WIND TO USEABLE MECHANICAL ENERGY |
| DEP2913290.9 | 1979-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1124181A true CA1124181A (en) | 1982-05-25 |
Family
ID=6067283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA348,964A Expired CA1124181A (en) | 1979-04-03 | 1980-04-01 | Rotor for converting the energy of natural wind into usable mechanical energy |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS55164784A (en) |
| AU (1) | AU537934B2 (en) |
| CA (1) | CA1124181A (en) |
| DE (1) | DE2913290A1 (en) |
| DK (1) | DK82380A (en) |
| FR (1) | FR2453286A1 (en) |
| NL (1) | NL8001324A (en) |
| SE (1) | SE8001846L (en) |
| ZA (1) | ZA801981B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606697A (en) * | 1984-08-15 | 1986-08-19 | Advance Energy Conversion Corporation | Wind turbine generator |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500259A (en) * | 1981-08-18 | 1985-02-19 | Schumacher Berthold W | Fluid flow energy converter |
| DE3928538A1 (en) * | 1989-08-29 | 1991-03-07 | Louis L Lepoix | Wind turbine shaft - is comprised of S-profile formed bodies |
| DE102008052182A1 (en) * | 2008-10-17 | 2010-04-22 | Debus, Martin | Savonius wind turbine, has rotor blades closed above by circular disk, opened down, and connected with common shaft, where wind turbine is guided into lattice cage or H-frame and spins around specific value |
| US20130008488A1 (en) * | 2011-07-07 | 2013-01-10 | Holmes John W | Use of rotating photovoltaic cells and assemblies for concentrated and non-concentrated solar systems |
| CN106704111A (en) * | 2016-12-12 | 2017-05-24 | 天津明阳风能叶片技术有限公司 | Novel screw type wind energy blade device equipment |
-
1979
- 1979-04-03 DE DE19792913290 patent/DE2913290A1/en not_active Ceased
-
1980
- 1980-02-27 DK DK82380A patent/DK82380A/en not_active Application Discontinuation
- 1980-03-05 NL NL8001324A patent/NL8001324A/en not_active Application Discontinuation
- 1980-03-10 SE SE8001846A patent/SE8001846L/en not_active Application Discontinuation
- 1980-03-31 FR FR8007206A patent/FR2453286A1/en active Granted
- 1980-04-01 CA CA348,964A patent/CA1124181A/en not_active Expired
- 1980-04-02 AU AU57114/80A patent/AU537934B2/en not_active Ceased
- 1980-04-02 ZA ZA00801981A patent/ZA801981B/en unknown
- 1980-04-03 JP JP4288780A patent/JPS55164784A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606697A (en) * | 1984-08-15 | 1986-08-19 | Advance Energy Conversion Corporation | Wind turbine generator |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8001846L (en) | 1980-10-04 |
| AU5711480A (en) | 1980-10-09 |
| JPS55164784A (en) | 1980-12-22 |
| ZA801981B (en) | 1981-04-29 |
| DK82380A (en) | 1980-10-04 |
| FR2453286A1 (en) | 1980-10-31 |
| FR2453286B3 (en) | 1982-02-12 |
| AU537934B2 (en) | 1984-07-19 |
| DE2913290A1 (en) | 1980-10-16 |
| NL8001324A (en) | 1980-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4288200A (en) | Wind tower turbine | |
| US20110027084A1 (en) | Novel turbine and blades | |
| US4006925A (en) | Wind power energy generating system | |
| ES439834A1 (en) | Wind turbine | |
| CA1124181A (en) | Rotor for converting the energy of natural wind into usable mechanical energy | |
| KR100853350B1 (en) | Wind power generator | |
| DK214885A (en) | ENERGY CONVERSION | |
| ES2150501T3 (en) | WIND ENERGY INSTALLATION, WITH A DARRIEUS ROTOR IN H. | |
| AU2002215254B2 (en) | Vertical axis wind turbine | |
| SE8900308A (en) | ||
| US20020153728A1 (en) | Wind turbine | |
| GB1562174A (en) | Devices for deriving opwer from the sea | |
| US4402650A (en) | Vertical axis rotor | |
| JPS6193279A (en) | Runner in turbine | |
| RU2783798C1 (en) | Wind power plant | |
| CA2330700A1 (en) | Wind funnel | |
| RU2029885C1 (en) | Wind motor | |
| FR2405378A1 (en) | Vertical axis wind-driven machine - has pairs of arms with auxiliary starter vanes and main vanes shaped to offer more wind resistance when moving in one direction | |
| US3899268A (en) | Wind-driven motive apparatus | |
| RU2088797C1 (en) | Wind-power unit | |
| KR890005066Y1 (en) | Wind turbine generating system | |
| RU2148185C1 (en) | Windmill rotor | |
| SU1502877A1 (en) | Wind motor rotor | |
| Nahas et al. | Performance prediction for windmills with linkage-guided blades | |
| JPS55161979A (en) | Gyro-type windimill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |