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GB2386161A - Fluid dynamic bladed rotor - Google Patents

Fluid dynamic bladed rotor Download PDF

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Publication number
GB2386161A
GB2386161A GB0205584A GB0205584A GB2386161A GB 2386161 A GB2386161 A GB 2386161A GB 0205584 A GB0205584 A GB 0205584A GB 0205584 A GB0205584 A GB 0205584A GB 2386161 A GB2386161 A GB 2386161A
Authority
GB
United Kingdom
Prior art keywords
rotor
blade segments
adjacent
locating means
hub portion
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.)
Granted
Application number
GB0205584A
Other versions
GB0205584D0 (en
GB2386161B (en
Inventor
Jonathan Rodger Laws
Paul Edward Atkinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ATKINSON DESIGN ASS Ltd
Original Assignee
ATKINSON DESIGN ASS Ltd
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
Application filed by ATKINSON DESIGN ASS Ltd filed Critical ATKINSON DESIGN ASS Ltd
Priority to GB0205584A priority Critical patent/GB2386161B/en
Priority to GB0602997A priority patent/GB2420158B/en
Publication of GB0205584D0 publication Critical patent/GB0205584D0/en
Publication of GB2386161A publication Critical patent/GB2386161A/en
Application granted granted Critical
Publication of GB2386161B publication Critical patent/GB2386161B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/24—Details
    • B65G33/26—Screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/24—Details
    • B65G33/26—Screws
    • B65G33/265—Screws with a continuous helical surface
    • 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
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12—Blades; Blade-carrying rotors
    • F03B3/121—Blades, their form or construction
    • 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 
    • F03D3/06—Rotors
    • F03D3/062—Rotors characterised by their construction elements
    • 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 
    • F03D3/06—Rotors
    • F03D3/062—Rotors characterised by their construction elements
    • F03D3/064—Fixing wind engaging parts to rest of rotor
    • F03D3/065—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
    • 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
    • F05B2210/00—Working fluid
    • F05B2210/16—Air or water being indistinctly used as working fluid, i.e. the machine can work equally with air or water without any modification
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Wind Motors (AREA)

Abstract

A rotor element 10 comprises a circular hub portion 12 and a pair of blade segments 14, 16 which are attached to and extend from diametrically opposite positions of the hub portion 12. The blade segments 14, 16 are helical in cross-section, and are curved longitudinally. A number of rotor elements 10 can be stacked on a drive shaft 22 in order to form a vertical axis wind turbine 23. Each of the blade segments 14, 16 is provided with locating means, for example, tongues and slots, which co-operate with the locating means of an adjacent rotor element 10 in the stack. The rotor element may be injection moulded in plastics or cast, for example from aluminium, and adjacent rotor elements in the stack may be bonded together using adhesive and/or welding (ultrasonic welding in the case of plastics). Horizontal or vertical ribs 13,15 may be provided.

Description

<Desc/Clms Page number 1>
Title: Rotor The present invention relates to a rotor and more particularly but not exclusively to a rotor for a turbine, for example a wind turbine.
The generation of electrical power from wind is desirable, because wind energy is sustainable, and clean. In use, wind turbines produce no emissions, for example, carbon dioxide or contaminated effluent, which are harmful to the environment.
It is known to provide both horizontal axis and vertical axis wind turbines. Horizontal axis turbines are driven by a rotor having a plurality of angularly spaced blades extending radially from a central hub. The central hub is axially connected to a substantially horizontal drive shaft, which either drives a generator directly, or through a gearbox. Vertical axis wind turbines have a vertical drive tube or hub, which is driven by a rotor having two or more angularly spaced helical blades. As well as being helical in cross section, each blade is curved longitudinally, ie, in a direction parallel with the vertical shaft. Each side of a blade is typically fabricated from a single sheet of metal, for example steel, which must be heated and pressed or hammered into shape. The helical blades are therefore expensive to produce, and are heavy.
Horizontal axis turbines are therefore more common than vertical axis wind turbines, due to their design simplicity, and ease and relatively low cost of manufacture. However, in applications where a low power wind turbine is mounted at low level, for example, on the roof of a garden shed, it is believed, subject to empirical testing, that a vertical axis wind turbine is more efficient than a horizontal axis turbine. This is because a vertical axis wind turbine is more capable of operating in gusty wind conditions, in which the wing blows in different directions, because the rotor blades do not require aligning to the wind direction.
<Desc/Clms Page number 2>
It is therefore an object of the invention to provide a rotor which is particularly suitable for a vertical axis wind turbine, and which is substantially simpler and cheaper to manufacture than existing designs of rotor.
According to the present invention there is provided a rotor element having a hub portion with an aperture therethrough for location on a drive shaft or drive tube, and at least two blade segments attached to and extending from spaced apart positions of the hub portion, each of the blade segments being provided with locating means, which are adapted to cooperate in use, with the locating means of an adjacent rotor element.
Preferably the hub portion is substantially circular. Two blade segments may be attached to and extend from diametrically opposite positions of the hub portion.
The rotor element is preferably moulded from plastics. Alternatively the rotor element is cast, for example, from aluminium.
Preferably a plurality of rotor elements are positioned in a stack to form a rotor, and the locating means serve to angularly align adjacent rotor elements in the stack to respective positions in which upper and lower edges of adjacent blade segments align to form a single blade.
Preferably, the locating means is provided by respective locating means on the upper and lower edges of adjacent blade segments.
The locating means may be tongues, which engage in respective slots.
Alternatively, the locating means is provided by respective locating means on the upper and lower edges of adjacent hub portions.
According to a yet further aspect of the present invention there is provided a method of manufacturing a rotor comprising injection moulding in plastics a plurality of rotor elements,
<Desc/Clms Page number 3>
each rotor element having a hub portion with an aperture therethrough for location on a drive shaft or drive tube, and at least two blade segments attached to and extending from spaced apart positions of the hub portion, stacking the rotor elements, and angularly aligning adjacent rotor elements in the stack to respective positions in which upper and lower edges of adjacent blade segments align to form a single blade.
The invention will now be described by way of example only with reference to the accompanying drawings in which: Fig 1 shows a perspective view of a first embodiment of a rotor element in accordance with the invention; Fig 2 shows a perspective view of a second embodiment of a rotor element; Fig 3 shows a perspective view of a third embodiment of a rotor element; Fig 4 shows a perspective view of a fourth embodiment of a rotor element; Fig 5 shows a perspective view of a fifth embodiment of a rotor element; Fig 6 shows a plan view of the rotor element shown in Fig 5; Fig 7 shows a partially exploded perspective view of a vertical axis wind turbine having a rotor including a plurality of rotor elements as shown in Figs 5 and 6; and Fig 8 shows an assembled perspective view of the vertical axis wind turbine of Fig 7.
Referring firstly to Fig 1, a rotor element is indicated generally at 10. The rotor element 10 comprises a circular hub portion 12 and a pair of blade segments 14,16, which are attached to and extend from diametrically opposite positions of the hub portion 12. The blade segments 14,16 are helical in cross section, and are curved longitudinally. Ribs 13,15 project
<Desc/Clms Page number 4>
from the blade segments 14,16, and extend along horizontal axes of the blade segments, along their helical shape. The ribs are intended to improve the strength and wind capture efficiency of the rotor element 10.
Further embodiments of the rotor element, referenced 20, 30, 40 and 50, are shown respectively in Figs 2 to 5, all of which include a circular hub portion and a pair of blade segments. Common reference numerals have been used to designate parts in common with the parts of Fig 1. The rotor element 20 has a pair of vertically extending spaced ribs 21 on each of the blade segments 14,16. The rotor element 30 has an enlarged tip 31 running along the distal edge of each of the blade segments 14,16, and the rotor element 40 has two pairs of horizontally extending spaced ribs 41 on each of the blade segments 14,16, each pair being connected at one end by a vertically extending connecting rib 43.
A circular aperture 18 passes through the centre of each hub portion 12, best seen in Fig 6, which enables the rotor elements 10,20, 30,40, 50 to be located on a drive shaft or drive tube 22 of a vertical axis wind turbine 23, as shown in Fig 7. Each hub portion 12 may be engaged with the shaft 22 by any one of a number of means, for example by splines or screws (not shown), enabling rotational drive to be passed either from the rotor elements to the shaft, or from the shaft to the rotor elements. The hub portion is able to locate on the shaft 22 in substantially any angular position, which enables adjacent rotor elements in a stack on the shaft 22, for example rotor elements 24,26 shown in Fig 7, to be angularly aligned. When the rotor elements 24,26 are angularly aligned, the upper edges 28 of the blade segments 12,14 of the lower rotor element 26 in the stack, align with the lower edges 32 of adjacent blade segments 12,14 of the upper rotor element 24, to form single blades, 34,36 of the rotor.
Referring back to Figs 1 to 6, locating means in the form of projecting tongues 38 are provided along the upper edge of the blade segments 12,14, which engage in respective slots (not shown) in the lower edges of adjacent blade segments 12,14.
<Desc/Clms Page number 5>
A further means for angularly aligning adjacent rotor elements may be provided by respective locating means on the upper and lower edges of adjacent hub portions 12, for example, dowels and holes (not shown).
The vertical axis wind turbine 23, also shown in Fig 8, comprises a base 38 for attaching to, for example, the roof of a building, or a mast (not shown). The shaft 22 extends vertically from the base 38, in which it is connected either directly to an electricity generator, or to a gearbox which drives the generator (not shown). Rotation of the shaft 22, caused by the action of wind on the rotor blades 34,36, thus enables electricity to be generated.
The rotor elements 10,20, 30,40, 50 are injection moulding in plastics, but may alternatively be cast, for example, from aluminium. In the assembly of a rotor, a plurality of rotor elements, are located on the drive shaft or drive tube 22 in a stack, and adjacent rotor elements in the stack are angularly aligned to respective positions in which upper and lower edges of adjacent blade segments align to form a single blade. Adjacent rotor elements can be bonded together using adhesive and/or welding, ultrasonic welding in the case of plastics rotor elements.
The cost of manufacture of injection moulded plastics or cast rotor elements, a set of which forms a rotor, is considerably cheaper than the cost of manufacturing rotors for vertical axis wind turbines in the conventional manner, as described above. Although the rotor elements 10,20, 30,40, 50 are described for use particularly with a vertical shaft to form a vertical axis wind turbine 23, as shown in Figs 7 and 8, one or more rotor elements may also be disposed on a horizontal shaft (not shown).
Wind accelerates as it passes over an angled roof, through compression, and reaches a maximum speed at the upper end of the roof. Therefore, rotor elements are usefully deployed on a horizontal shaft which is positioned at the upper end of a sloping roof covering (not shown), for example, parallel with the ridge of a gabled roof.
<Desc/Clms Page number 6>
A rotor assembled from one or more rotor elements 10,20, 30,40, 50 may also be driven by fluids other than air, for example, water. It is envisaged that the rotor elements can be used in the construction of a rotor for a marine turbine, in particular, a marine turbine powered by tidal waters.
In a further application of the invention (not shown), the rotor elements 10,20, 30,40, 50 may be mounted on a driven shaft, to form a rotor which is driven. The rotor may be mounted in a cylindrical housing in the manner of an auger screw, and used, for example, to lift grain into a silo.
Although the invention has been described with reference to a rotor for use in a wind turbine, marine turbine and auger screw, it will be appreciated that the invention is not intended to be limited to these applications.

Claims (5)

  1. CLAIMS 1. A rotor element having a hub portion with an aperture therethrough for location on a drive shaft or drive tube, and at least two blade segments attached to and extending from spaced apart positions of the hub portion, each of the blade segments being provided with locating means, which are adapted to co-operate in use, with the locating means of an adjacent rotor element.
  2. 2. A rotor element as claimed in claim 1 in which the rotor element is moulded from plastics.
  3. 3. A rotor comprising a plurality of rotor elements as claimed in claim 1 or 2, in which the rotor elements are positioned in a stack, and the locating means serve to angularly align adjacent rotor elements in the stack to respective positions in which upper and lower edges of adjacent blade segments align to form a single blade.
  4. 4. A rotor as claimed in claim 3 in which the locating means is provided by respective locating means on the upper and lower edges of adjacent blade segments.
  5. 5. A method of manufacturing a rotor comprising injection moulding in plastics a plurality of rotor elements, each rotor element having a hub portion with an aperture therethrough for location on a drive shaft or drive tube, and at least two blade segments attached to and extending from spaced apart positions of the hub portion, stacking the rotor elements, and angularly aligning adjacent rotor elements in the stack to respective positions in which upper and lower edges of adjacent blade segments align to form a single blade.
GB0205584A 2002-03-09 2002-03-09 Rotor for a turbine Expired - Lifetime GB2386161B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0205584A GB2386161B (en) 2002-03-09 2002-03-09 Rotor for a turbine
GB0602997A GB2420158B (en) 2002-03-09 2002-03-09 Method of manufacture of a rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0205584A GB2386161B (en) 2002-03-09 2002-03-09 Rotor for a turbine

Publications (3)

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GB0205584D0 GB0205584D0 (en) 2002-04-24
GB2386161A true GB2386161A (en) 2003-09-10
GB2386161B GB2386161B (en) 2006-05-31

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GB0205584A Expired - Lifetime GB2386161B (en) 2002-03-09 2002-03-09 Rotor for a turbine
GB0602997A Expired - Lifetime GB2420158B (en) 2002-03-09 2002-03-09 Method of manufacture of a rotor

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GB0602997A Expired - Lifetime GB2420158B (en) 2002-03-09 2002-03-09 Method of manufacture of a rotor

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404227A (en) * 2003-07-24 2005-01-26 Xc02 Conisbee Ltd A vertical axis wind turbine
GB2412948A (en) * 2004-04-08 2005-10-12 Alfred Learmonth Wind or water-driven generator
GB2436612A (en) * 2006-04-01 2007-10-03 Firewinder Company Ltd Rotating light
WO2007141367A1 (en) * 2006-06-02 2007-12-13 Ryynaenen Seppo Method and apparatus for converting marine wave energy by means of a difference in flow resistance form factors into electricity
WO2008100580A1 (en) 2007-02-13 2008-08-21 Helix Wind, Inc. Wind-driven electricity generation device with segmented savonius rotor
WO2009018666A1 (en) * 2007-08-08 2009-02-12 Rokeby-Thomas Andrew Byron Rhy Transverse-axis turbine with twisted foils
WO2009109107A1 (en) * 2008-03-04 2009-09-11 南京宇能仪表有限公司 A wind power generating system
CN101955055A (en) * 2010-08-27 2011-01-26 天津市金桥焊材集团有限公司 Automatic powder feeding device for spiral extrusion press
WO2011142653A1 (en) * 2010-05-10 2011-11-17 De Archimedes B.V. Windmill, rotor blade and method
RU2438036C2 (en) * 2006-06-02 2011-12-27 Сеппо Рюнянен Method and device of energy conversion of sea waves to electric energy by differentiating between form coefficients determining hydraulic resistance
US8143738B2 (en) 2008-08-06 2012-03-27 Infinite Wind Energy LLC Hyper-surface wind generator
FR2968725A1 (en) * 2010-12-08 2012-06-15 Peugeot Citroen Automobiles Sa Savonius rotor type wind power device i.e. wind turbine, for mounting on roof of e.g. motor vehicle, to convert wind into electrical energy, has rotary shaft arranged to vary in height from folded position to deployed position
US20120183407A1 (en) * 2009-09-22 2012-07-19 Vallejo Roberto Vertical-axis wind turbine
CN102852710A (en) * 2012-09-12 2013-01-02 江苏中蕴风电科技有限公司 Butterfly-wing type engine rotor
CN102900620A (en) * 2012-09-29 2013-01-30 冯桂华 Screw-type wind power generator
US8393853B2 (en) * 2007-11-19 2013-03-12 Ocean Renewable Power Company, Llc High efficiency turbine and method of generating power
WO2013104382A1 (en) * 2012-01-12 2013-07-18 Don Mirko Wind energy converter
US20130237744A1 (en) * 2007-10-08 2013-09-12 Ais Gmbh Aachen Innovative Solutions Catheter device
EP2250042A4 (en) * 2008-02-19 2014-01-01 Jeffrey Ryan Gilbert Energy recovery system and method of using the same
ITCH20120012A1 (en) * 2012-07-02 2014-01-03 Giuseppe Salvatore Infante MODULAR WIND TURBINE
CN104564800A (en) * 2015-01-22 2015-04-29 王振科 Device for generating air current through spiral disturbance
CN104948383A (en) * 2015-05-14 2015-09-30 杰米伊罗德里格斯 Rotary blade of wind power generator and wind power generator using the blade
CN106065840A (en) * 2015-04-22 2016-11-02 黄国彰 Flow force blade device
US9828968B1 (en) * 2014-02-11 2017-11-28 Dorraine Marie Rooney HydroQueen
WO2019009730A1 (en) * 2017-07-06 2019-01-10 Apl Technology As Energy harvesting device
WO2024074873A1 (en) 2022-10-06 2024-04-11 Mlc Wind Turbine Ltd Improvements in and relating to wind turbines
WO2024077396A1 (en) * 2022-10-13 2024-04-18 Kootenay Kinetic Energy Turbine Inc. Vertical axis turbine
US20250243838A1 (en) * 2023-05-08 2025-07-31 Jiangsu University Hydropower device combining lift and drag effects

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US8864440B2 (en) 2010-11-15 2014-10-21 Sauer Energy, Incc. Wind sail turbine
US8905704B2 (en) 2010-11-15 2014-12-09 Sauer Energy, Inc. Wind sail turbine
CN103183208B (en) * 2013-04-07 2016-01-20 普瑞特机械制造股份有限公司 A kind of vertical screw conveyer is realized automatic material taking promotes servo-actuatedly leads skirt and subsystem thereof
CN105041564A (en) * 2015-08-17 2015-11-11 罗彪 Wind wheel of vertical-axis wind turbine
CN111439539B (en) * 2019-12-05 2024-12-31 中交第一航务工程局有限公司 Double-force screw transport mechanism

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GB299634A (en) * 1927-12-16 1928-11-01 Sigurd Johannes Savonius Improvements in or relating to wind rotors
GB1398091A (en) * 1971-05-08 1975-06-18 Sharman H D Augers
GB1421795A (en) * 1972-07-06 1976-01-21 Girolamo S Di Fanwheel for a transverse-flow fan and fan fitted with such wheel
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US6036443A (en) * 1994-01-11 2000-03-14 Northeastern University Helical turbine assembly operable under multidirectional gas and water flow for power and propulsion systems
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB299634A (en) * 1927-12-16 1928-11-01 Sigurd Johannes Savonius Improvements in or relating to wind rotors
GB1398091A (en) * 1971-05-08 1975-06-18 Sharman H D Augers
GB1421795A (en) * 1972-07-06 1976-01-21 Girolamo S Di Fanwheel for a transverse-flow fan and fan fitted with such wheel
EP0246325A1 (en) * 1985-11-11 1987-11-25 Hosiden Electronics Co., Ltd. Cross-flow cooling fan device
US4976341A (en) * 1987-01-22 1990-12-11 Lundell Vance G Segmented auger
US6036443A (en) * 1994-01-11 2000-03-14 Northeastern University Helical turbine assembly operable under multidirectional gas and water flow for power and propulsion systems
US6318964B1 (en) * 2000-09-08 2001-11-20 Sheng Shyan Yang Complex cooling fan with increased cooling capacity

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404227A (en) * 2003-07-24 2005-01-26 Xc02 Conisbee Ltd A vertical axis wind turbine
GB2404227B (en) * 2003-07-24 2006-02-01 Xc02 Conisbee Ltd Vertical-axis wind turbine
GB2412948A (en) * 2004-04-08 2005-10-12 Alfred Learmonth Wind or water-driven generator
GB2412948B (en) * 2004-04-08 2007-02-28 Alfred Learmonth Wind or water motor
GB2436612A (en) * 2006-04-01 2007-10-03 Firewinder Company Ltd Rotating light
EP2032837A4 (en) * 2006-06-02 2013-01-02 Seppo Ryynaenen Method and apparatus for converting marine wave energy by means of a difference in flow resistance form factors into electricity
US8206113B2 (en) 2006-06-02 2012-06-26 Ryynaenen Seppo Method and apparatus for converting marine wave energy by means of a difference in flow resistance form factors into electricity
RU2438036C2 (en) * 2006-06-02 2011-12-27 Сеппо Рюнянен Method and device of energy conversion of sea waves to electric energy by differentiating between form coefficients determining hydraulic resistance
WO2007141367A1 (en) * 2006-06-02 2007-12-13 Ryynaenen Seppo Method and apparatus for converting marine wave energy by means of a difference in flow resistance form factors into electricity
WO2008100580A1 (en) 2007-02-13 2008-08-21 Helix Wind, Inc. Wind-driven electricity generation device with segmented savonius rotor
EP2115300A4 (en) * 2007-02-13 2011-07-06 Helix Wind Inc Wind-driven electricity generation device with segmented savonius rotor
WO2009018666A1 (en) * 2007-08-08 2009-02-12 Rokeby-Thomas Andrew Byron Rhy Transverse-axis turbine with twisted foils
US8602718B2 (en) 2007-08-08 2013-12-10 Art Turbine Inc. Transverse-axis turbine with twisted foils
CN101842585B (en) * 2007-08-08 2012-10-10 艺术涡轮公司 Transverse-axis turbine with twisted airfoils
US11583659B2 (en) 2007-10-08 2023-02-21 Ais Gmbh Aachen Innovative Solutions Catheter device
US10874783B2 (en) 2007-10-08 2020-12-29 Ais Gmbh Aachen Innovative Solutions Catheter device
US11338124B2 (en) 2007-10-08 2022-05-24 Ais Gmbh Aachen Innovative Solutions Catheter device
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GB2420158A (en) 2006-05-17
GB2386161B (en) 2006-05-31

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