WO2013144610A2 - Dispositif à vis pour une génération de puissance ou un appareil de maniement de matériau - Google Patents

Dispositif à vis pour une génération de puissance ou un appareil de maniement de matériau Download PDF

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Publication number
WO2013144610A2
WO2013144610A2 PCT/GB2013/050785 GB2013050785W WO2013144610A2 WO 2013144610 A2 WO2013144610 A2 WO 2013144610A2 GB 2013050785 W GB2013050785 W GB 2013050785W WO 2013144610 A2 WO2013144610 A2 WO 2013144610A2
Authority
WO
WIPO (PCT)
Prior art keywords
screw device
feeder
material engaging
screw
support structure
Prior art date
Application number
PCT/GB2013/050785
Other languages
English (en)
Other versions
WO2013144610A3 (fr
Inventor
Gordon FRANKLAND
Original Assignee
Towerlane Limited
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 Towerlane Limited filed Critical Towerlane Limited
Priority to EP13719132.6A priority Critical patent/EP2831407A2/fr
Publication of WO2013144610A2 publication Critical patent/WO2013144610A2/fr
Publication of WO2013144610A3 publication Critical patent/WO2013144610A3/fr

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
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/10—Machines or engines of reaction type; Parts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
    • F03B3/103—Machines or engines of reaction type; Parts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines the same wheel acting as turbine wheel and as pump wheel
    • 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
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F03B17/061—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially in flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F04D3/02—Axial-flow pumps of screw 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
    • F05B2240/20—Rotors
    • F05B2240/24—Rotors for turbines
    • F05B2240/243—Rotors for turbines of the Archimedes screw type
    • 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
    • Y02E10/20—Hydro energy

Definitions

  • the present invention relates to a screw device for use in a power generation or a material handling apparatus and relates particularly, but not exclusively, to an Archimedes screw for use in a small scale hydroelectric power generation device.
  • Archimedes screw in small scale hydroelectric power generation has become increasingly popular in recent years as they provide an efficient method of generating electricity from the potential energy of low head hydropower resources such as weirs and are v fish- friendly' .
  • a 'closed' Archimedes screw there is a central cylinder and extending from this in an axially outward direction are one or more helical blades turning around it like the thread of a screw.
  • a concentric second cylinder is connected to the outermost edge of the blades and water is able to pass through the channels formed between the inner and outer cylinders and adjacent blades.
  • the interaction between the angle to the horizontal of the screw and the helical blades splits these channels into a number of 'buckets' which are off centre with respect to the axis of the screw so the weight of water in them causes the screw to rotate.
  • the buckets travel up the screw when it is rotated in the right direction so lifting water or other material to the top of the screw.
  • An 'open' Archimedes screw is formed in the same manner as the closed screw but without the second outermost cylinder which is functionally replaced by a channel/trough or cylinder fixed in relation to the ground and shaped to closely follow the outermost edge of the blade as it rotates; 'buckets' are formed between adjacent blades, this trough and the central cylinder.
  • the gap between the outermost edge of the blade and the channel must be kept to a minimum to avoid excess leakage of water from the 'buckets' .
  • This leakage is proportionately greater for smaller units or for larger units with the smaller buckets that result from having more interleaved blades on a screw of given diameter.
  • An 'open' screw with larger buckets is therefore most effective at a shallower angle (and correspondingly greater length) .
  • Preferred embodiments of the present invention seek to overcome the above described disadvantages of the prior art .
  • a screw device for a power generation or a material handling apparatus comprising: - at least one support structure axially rotatable around an axis ; a plurality of substantially tubular material engaging elements attached to and extending around and substantially along the length of the support structure thereby forming an Archimedes screw device; and at least one feeder member having a first end sized to engage an end of at least one material engaging element so as to allow transfer of material from said feeder member to said material engaging element and a second end forming, or combining with other feeder members to form, a substantially annular entrance aperture to the material engaging elements of the screw device.
  • annular entrance For optimum efficiency and minimal turbulence or loss in transferring water or other material into a screw device, an annular entrance should be provided that is divided depending upon the number of tubular material engaging elements being fed.
  • Each of the material engaging elements or pipes in the screw device has an optimum volume of water that it can carry in each turn of the helical pipe . This can be used to calculate the optimum rate at which water should enter each pipe based on factors such as the diameter/size of the pipe and the rotation speed of the screw (which has an optimum rate and sometimes also a regulatory limit) . For example, a given size of pipe may optimally handle a flow of water into it of 100 litres per second.
  • the screw device should ideally be provided with six such pipes and so on up to the maximum number that can be fitted around the central cylinder. If the design flow exceeds the maximum possible number of material engaging elements on a screw, then a second screw in parallel to the first can be provided and so on.
  • screw devices can be formed mainly from a kit of standard parts that can handle a wide variety of flow rates by simply changing the shape of the feeder members that form the entrance aperture to the screw device .
  • the pipes remain the same and the support structure remain very nearly the same (the length may vary) , thereby reducing manufacturing costs at the same time as enabling the device to customised for the site.
  • By making the channels from pipe segments in a 'closed' screw it is possible to economically utilise more but smaller pipes (and therefore buckets) . This is because the pipe segments can be cheaply mass produced by extrusion or moulding, and also there is no leakage flow to worry about.
  • utilising more, smaller buckets means in turn that performance is better (other things being equal) at steeper angles and as a result, the overall screw can be shorter and cheaper.
  • at least one said material engaging element comprises a plurality of pipe portions.
  • the device comprises a single said feeder member that feeds into a plurality of material engaging elements .
  • the device may further comprise a plurality of feeder member with one feeder member per material engaging element .
  • the support structure comprises a substantially cylindrical body.
  • a power generation apparatus comprising: - at least one screw device as defined above; and at least one power generation device for converting rotation of said screw device into electrical power.
  • a material handling apparatus comprising: - at least one screw device as defined above; and at least one drive device for providing rotational drive to at least one said screw device.
  • a kit of parts for forming screw a device for a power generation or a material handling apparatus comprising:- at least one support structure axially rotatable around an axis; a plurality of substantially tubular material engaging elements for attaching to and extending around and substantially along the length of the support structure thereby forming an Archimedes screw device; and a plurality of feeder members, each feeder member having a first end sized to engage an end of at least one material engaging element so as to allow transfer of material from said feeder member to said material engaging element and a second end forming, or combining with other feeder members to form, a substantially annular entrance aperture to the material engaging elements of the screw device, one or more feeder members being selected to be used in the screw device depending upon the optimum flow to be carried by the screw device .
  • a method of making a screw device for a power generation or a material handling apparatus comprising: - providing at least one support structure axially rotatable around an axis; attaching a plurality of substantially tubular material engaging elements to the support structure such that they extend around and substantially along the length of the support structure thereby forming an Archimedes screw device; and engaging around an end of at least one material engaging element at least one feeder member having a first end sized to engage an end of at least one material engaging element so as to allow transfer of material from said feeder member to said material engaging element, the feeder member also having a second end forming, or combining with other feeder members to form, a substantially annular entrance aperture to the material engaging elements of the screw device wherein said feeder member is selected from a plurality of differently sized feeder member each designed to engage and seal the same sized material engaging element but designed that alone or together the feeder members feed into a different number of material engaging elements.
  • the method may further comprise determining an optimum flow for the screw device and selecting the number of material engaging elements depending on the optimum flow.
  • FIG 2 is a perspective view of a feeder member used in the screw device of Figure 1;
  • FIGS 3 and 4 are perspective views of a series of feeder members of Figure 2 ; and Figures 5 and 6 are perspective views of a series of feeder members of an alternative embodiment of the present invention.
  • a screw device 10 is provided for use in a power generation device, such as an Archimedes screw turbine or in a material handling apparatus, with the device shown in Figure 1 particularly for use in an Archimedes screw turbine or pump.
  • the screw device 10 has a support structure or central cylinder 12 that includes an axle 14 having a lower axle end 16 and an upper axle end 18.
  • the central cylinder 12 is typically formed as a cylinder and has the axle 14 mounted at its centre of rotation .
  • the screw device 10 also has a plurality of substantially tubular material engaging elements or pipes 20 attached to and extending around and substantially along the length of the central cylinder 12 from adjacent the upper axle end 18 to the lower axle end 16.
  • the pipes 20 are formed from pipe sections 22 that are typically identically formed and joined together to form the pipe 20 that spirals around the central cylinder 12.
  • the pipe sections are attached to the central cylinder by any suitable means which includes bolts fastened to the central cylinder and pipe section and/or by strappings extending around the outside of the pipe portions thereby holding them into engagement with the central cylinder 12. Adjacent the upper axle end 18, at least one feeder member 24 is provided.
  • the feeder member 24 has a first or output end 26 that is sized to engage and substantially seal around an end of a pipe 22 so as to allow transfer of material from said feeder member to said material engaging element.
  • the feeder member 24 also has a second or input end 28 that combines with other feeder members to form a substantially annular entrance aperture to the pipes 20 of screw device 10, as shown most clearly in Figure 3.
  • a device such as an upward pointing cone formed around the screw axle and covering the space radially inward of the feeder members 24 serves to direct flow into the feeder members and prevent it running down the centre of the support structure thereby adding weight without contributing power output.
  • the annular inlet is formed from the input ends 28 of three feeder members 24 that are sized differently from those shown in Figures 3 and 4.
  • the first ends 26 of feeder members 24 are sized similarly to those in Figures 3 and 4 and are designed to attach to pipes 20 that are the same size for both embodiments .
  • an embodiment of the present invention using the feeder members 24 shown in Figures 5 and 6 will feed to three pipes 20 that are wound in a helical manner around the central cylinder 12 instead of the six pipes 20 used for the feeder members 24 in Figures 3 and 4 and as shown in Figure 1.
  • the other components of the screw device 10, particularly the central cylinder 12 and pipes 20, formed from pipe sections 22, are the same for both embodiments and it is only the feeder members 24 that change, although less pipe sections 22 are required for the embodiment having three feeder members 24. It will be immediately apparent that the screw device 10 having the three feeder members shown in Figures 5 and 6 is designed to work with a flow rate of approximately half that which the embodiment shown in Figures 1, 3 and 4 is designed to use. As a result, the major components of the screw device 10, namely the central cylinder 12 and pipe sections 22, are standard with the feeder members 24 changing depending upon the design flow rate of the screw.
  • the pipes 20 in a screw device 10 may be designed for and sized to operate with a flow rate of 100 litres per second per pipe at the optimum rotational speed.
  • a pair of feeder members 24, each having a input end 28 in the form of a half-annulus will be used together with two pipes 20 to form the screw device 10.
  • the average usable flow for the water course is 500 litres per second, then five feeder members that each form a fifth of the annulus are used to feed into five pipes 20.
  • the support structure can be made in any convenient form including, but not limited to, a cylinder formed from thin steel plate or composite materials of sufficient strength. It may be pierced by openings to facilitate assembly and allow maintenance inspections and, if necessary, treated and/or painted to prevent corrosion. It may also have holes for bolts to secure pipe clamps or other fixings to hold the material engaging elements securely in place. At each end the support structure is fixed securely to a stub axle by any of the well-known means .
  • the material engaging elements can be extruded as helical pipes or they can be moulded in segments from a suitable grade of plastic or plastic composite.
  • the feeder devices can be moulded from a suitable grade of plastic or made from steel or other suitable material .
  • a screw device 10 In use as a pump, the input end 28 of a screw device 10 is immersed in the water or other material to be pumped and as it rotates water or other material is scooped into the feeder members 24 and then directed by them into the pipes 20 where is collects into buckets which are lifted to the top of the screw by its rotation.
  • support for the screw device may be provided by using rollers engaging an external surface of the screw device rather than using axle 1 .
  • central cylinder 12 may be provided with apertures in its curved surface allowing access and making attachment of the pipe sections to the central cylinder 12 easier.
  • any number of feeder members 24 can feed into any number of pipes, including a single pipe with a large annular feeder member.
  • a larger number of smaller material handling elements is more likely to snag debris and is likely to have a higher ratio of material and manufacturing cost to the total flow they can handle plus a larger number of fixings which again increases costs. Taken together these considerations limit the maximum number of material handling elements that is cost- effective .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Screw Conveyors (AREA)
  • Hydraulic Turbines (AREA)

Abstract

L'invention concerne un dispositif à vis pour une génération de puissance ou un appareil de maniement de matériau. Elle concerne en particulier une structure de support ou cylindre central. Des organes à vis sont connectés au cylindre central. Les organes à vis sont formés de parties tubulaires qui sont jointes et enroulées autour du cylindre central pour former un certain nombre de tubes hélicoïdaux. Des organes d'alimentation qui forment ensemble un orifice annulaire alimentant les tubes hélicoïdaux sont fixés à la partie supérieure de chaque tube hélicoïdal. Le nombre d'organes d'alimentation et de tubes est sélectionné en fonction du débit de conception du dispositif.
PCT/GB2013/050785 2012-03-26 2013-03-26 Dispositif à vis pour une génération de puissance ou un appareil de maniement de matériau WO2013144610A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13719132.6A EP2831407A2 (fr) 2012-03-26 2013-03-26 Dispositif à vis pour une génération de puissance ou un appareil de maniement de matériau

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1205308.8A GB2500619B (en) 2012-03-26 2012-03-26 A screw device for a power generation or a material handling apparatus
GB1205308.8 2012-03-26

Publications (2)

Publication Number Publication Date
WO2013144610A2 true WO2013144610A2 (fr) 2013-10-03
WO2013144610A3 WO2013144610A3 (fr) 2013-11-21

Family

ID=46087148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2013/050785 WO2013144610A2 (fr) 2012-03-26 2013-03-26 Dispositif à vis pour une génération de puissance ou un appareil de maniement de matériau

Country Status (3)

Country Link
EP (1) EP2831407A2 (fr)
GB (1) GB2500619B (fr)
WO (1) WO2013144610A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516541A1 (de) * 2014-11-25 2016-06-15 Bernhard Mayrhofer Schlauch-Wasserkraftschnecke

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107387292A (zh) * 2017-09-13 2017-11-24 安徽金贺财建筑工程有限公司 一种旋转导管式的水轮机及其方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005042970A1 (fr) * 2003-10-31 2005-05-12 Jae Won Park Turbine spiralee en deux parties
WO2005124148A1 (fr) * 2004-06-15 2005-12-29 Bernhard Weber Machine hydraulique a plusieurs conduites d'eau enroulees sous forme helicoidale
WO2011039750A2 (fr) * 2009-09-29 2011-04-07 Re-10 Ltd Turbine hélicoïdale creuse conique pour transduction d'énergie
WO2011128640A2 (fr) * 2010-04-17 2011-10-20 The Archimedes Screw Company Limited Ensemble vis d'archimède

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004116505A (ja) * 2002-09-26 2004-04-15 Shigeki Odera ラセン状管を利用した水車原動機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005042970A1 (fr) * 2003-10-31 2005-05-12 Jae Won Park Turbine spiralee en deux parties
WO2005124148A1 (fr) * 2004-06-15 2005-12-29 Bernhard Weber Machine hydraulique a plusieurs conduites d'eau enroulees sous forme helicoidale
WO2011039750A2 (fr) * 2009-09-29 2011-04-07 Re-10 Ltd Turbine hélicoïdale creuse conique pour transduction d'énergie
WO2011128640A2 (fr) * 2010-04-17 2011-10-20 The Archimedes Screw Company Limited Ensemble vis d'archimède

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516541A1 (de) * 2014-11-25 2016-06-15 Bernhard Mayrhofer Schlauch-Wasserkraftschnecke

Also Published As

Publication number Publication date
WO2013144610A3 (fr) 2013-11-21
GB2500619B (en) 2014-07-16
GB2500619A (en) 2013-10-02
EP2831407A2 (fr) 2015-02-04
GB201205308D0 (en) 2012-05-09

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