WO2020008238A1 - Turbo-machines sans arbre & systèmes de propulsion - Google Patents

Turbo-machines sans arbre & systèmes de propulsion Download PDF

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Publication number
WO2020008238A1
WO2020008238A1 PCT/IB2018/055000 IB2018055000W WO2020008238A1 WO 2020008238 A1 WO2020008238 A1 WO 2020008238A1 IB 2018055000 W IB2018055000 W IB 2018055000W WO 2020008238 A1 WO2020008238 A1 WO 2020008238A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
less
propeller
laim
shroud
Prior art date
Application number
PCT/IB2018/055000
Other languages
English (en)
Inventor
modjtaba KABOODVANDY RAD
Original Assignee
Kaboodvandy Rad Modjtaba
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 Kaboodvandy Rad Modjtaba filed Critical Kaboodvandy Rad Modjtaba
Priority to PCT/IB2018/055000 priority Critical patent/WO2020008238A1/fr
Publication of WO2020008238A1 publication Critical patent/WO2020008238A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H2001/122—Single or multiple threaded helicoidal screws, or the like, comprising foils extending over a substantial angle; Archimedean screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
    • B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
    • B63H2011/081—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type with axial flow, i.e. the axis of rotation being parallel to the flow direction

Definitions

  • This invention relates generally to turbo-machines and propulsion systems, and, more
  • Turbo-machines may be classified into two categories: those that produce energy to increase the fluid pressure, i.e. pumps, fans, and compressors, and those that absorb energy such as turbines by expanding flow to lower pressures.
  • a pump is a device that moves fluids by mechanical action and a turbine is a rotary
  • the work produced by a turbine can be used for generating electrical power when combined with a generator.
  • a propulsion system consists of a source of mechanical power, and a propulsor (means of converting this power into propulsive force) or propeller that transmits power by converting rotational motion into thrust.
  • Turbo-machines have at least one moving part called a rotor assembly, which is a shaft or drum with blades attached.
  • a shaft-less turbo-machine comprises at least one blade, a shroud that at least one said blade is disposed into said shroud, and a shaft-less propeller coupled to a generator or engine unit.
  • FIG.1A is a perspective view of the Shaft-less Turbo-machine that driven by gear wheel and use a gear-box to control and change in rpm.
  • FIG.1 B is an exploded perspective view of the Shaft-less Turbo-machine that driven by gear wheel.
  • FIG.1C is a perspective view of the gear-box (transmission unit) without its case.
  • FIG.2A is a perspective view of a Shaft-less Turbo-machine that is driven by electrical motor or drive generator.
  • Fig.2B is a perspective view of a Shaft-less Turbo-machine that is driven by electrical motor or drive generator.
  • FIG.2B is an exploded perspective view of the Shaft-less Turbo-machine that is driven by electrical motor or drive generator.
  • FIG.3A is a perspective view of a Shaft-less Turbo-machine with separate casing that driven by gear wheel.
  • FIG.3B is a perspective view of the Shaft-less Turbo-machine with united casing that driven by gear wheel.
  • FIG.4 is a perspective view of the Shaft-less Turbo-machine that driven by chain drive.
  • FIG.5 is a perspective view of a Shaft-less propulsion system (water-jet);
  • FIG.6 is a perspective view of a Shaft-less propeller with its shroud
  • FIG.7A is a perspective view of a Shaft-less propeller with both two full and two splitter blades and without its shroud.
  • FIG.7B is a perspective view of a Shaft-less propeller with both three full and three splitter blades and without its shroud.
  • FIG.8 is a perspective view of a Shaft-less propeller that is fish-friendly
  • FIG.9 is a perspective view of a Shaft-less propeller with hub.
  • FIG.10 is a perspective view of an Archimedes Shaft-less propeller with hub.
  • articles“a,”“an,” and“the” are intended to mean that there are one or more of the elements.
  • the adjective“another,” when used to introduce an element, is intended to mean one or more elements.
  • the terms“including” and“having” are intended to be inclusive such that there may be additional elements other than the listed elements.
  • a Shaft-less Turbo-machine that driven by gear wheel 22 includes a shaft-less propeller 50; a gear box 36; shaft 23; casing of ball bearing 46; supportive structure 44; and engine or generator 20.
  • One embodiment of the shaft-less turbo-machine is illustrated in Fig. 1A.
  • the shaft-less turbo-machine has shaft-less propeller 50 consisting of a plates of material which can be durable and supportive to each other.
  • a shroud 52 and blades 54 are metallic stiffened structures, such as steel, aluminum, etc.
  • shroud 52 and blades 54 can consist of any other material such as plastic, composite, etc.
  • Shaft-less propeller may be powered by any source of shaft power such as a reciprocating engine, Wankel engine, electric motor, etc.
  • Gearboxes have designed and developed in a wide variety of different types; simple one is shown in this embodiment. As most gearbox, lubrication rely on splash lubrication although gearbox may will incorporate an oil pump. Gearbox 36 is filled to capacity from filler plug 40 and discharged at drain plug 42.
  • the shaft-less turbo-machine that driven by gears 26 includes a gear wheel 22; separable casings 24; gears 26 mounted on shaft-less propeller 50; flanges 30; ball bearings 48; inlet 32; outlet 34; bolts 38; and long bolts 28.
  • Propeller blades 54 is mounted and joined within a cylindrical shroud 52 or duct that is rotate together.
  • the shroud 52 reduces losses in pressure from the tips of the props.
  • Cross-section of the shroud 52 can be varied that varying the cross-section of the shroud 52 allows the designer to advantageously affect the velocity and pressure of the flow.
  • a propeller transmits power by converting rotational motion of engine into pressure difference. Pressure difference is produced between the forward and rear surfaces of the blade, and a fluid (such as air or water) is accelerated behind the blade.
  • a turbine is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating electrical power when combined with a generator.
  • the gear-box without its casing 39 includes ball bearings 48; large
  • gearwheel 62 gearwheel 62; small gearwheel 63; Input shaft 56; Output shaft 58; and Counter shafts 60.
  • the essential information required for designing a Gear box are the lowest output (rpm); the highest output (rpm); the number of steps into which the range between the highest output and the lowest output is divided; and the number of stages in which the required number of speed steps are to be achieved.
  • Conventional gearbox, hydraulic transmission, or any other transmission unit may be used to change rotational speed.
  • a shaft-less propeller can be made to cooperate with a liquid, with a stator having a circular opening and a rotor mounted in the opening and having an annular rotor body with a multiplicity of inwardly projecting propeller blades, with the bearings between the rotor and stator having a ball bearing.
  • Shaft-less propeller 50 includes a Main casing 68; long bolts and nuts 28; and Separable casing 70.
  • Pumps and propulsion systems such as water-jet system could have stationary guide vanes 64 to direct the working fluid at the appropriate angle towards the outlet; and turbines could have stationary guide vanes 64 to direct the working fluid at the appropriate angle towards the propeller.
  • the distance between the downstream edges of the guide vanes 64 and the leading edges of the propeller will have a bearing on the size of fish that can safely pass through the turbine, and prevent from large fish, sharks, etc. to inter and injured by blades 54 of propellers.
  • Fig. 2B shows a shaft-less turbo-machine which includes a shaft-less propeller 50 supported by the ball bearing 48.
  • Shaft-less propeller 50 have blades 52 fixed therein so that fluid will rotate the propeller 50 and thereby the shroud 52 or propeller 50 will rotate and transfer fluid.
  • a stator 74 which in use is fixed to the main casing 68, and a rotor 72 which is constrained for rotation within the stator 74 thereby and generate power or motor will rotate propeller 50; power transferred by power cable 66.
  • the invention has been described above with reference to a propeller forming part of the propulsion installation of a vessel.
  • the invention therefore also relates to a propeller/motor unit comprising a propeller of this type, at the circumference provided with permanent magnets, and also stator windings, provided around the opening of the stator, for driving the rotor in cooperation with the magnets.
  • the invention further encompasses a propeller/generator unit comprising a propeller as described above, wherein the rotor may be driven by a flow of liquid through the rotor, stator windings provided around the opening of the stator and also permanent magnets, provided at the circumference of the rotor, for generating an electric current in the stator windings when the rotor is driven.
  • FIG. 3A shows separable casings 24 that fixed together with long bolt and nut 28, and, inlet 32 and outlet 34 fixed with nut 75 on thread 65 of separable casings 24; while Fig. 3B shows united casings 78 fixed on base 76 by bolt 38.
  • Fig. 4 shows the Shaft-less Turbo-machine includes a Chain drive 80; chain 82; Gear wheel 84; and gears 86. Chain drives and belts are used in greater distance between shaft less propeller 50 and engine/generator 20. Water-pump, oil-pump, or fuel pump of car engine instead of using power from independent engine, they use the torque from main engine by a gearwheel, a pulley or any other means for transmission the torque (not shown).
  • a Shaft-less propulsion system (water-jet) includes an engine 20; a
  • Shaft-less propulsion system offer enhanced safety in undersurface of water for blades and sea cables, sharks, whales, etc.
  • Shaft less propeller can be more efficient than an open rotor. The improved performance is because of the outward flow is less contracted and thus carries more kinetic energy.
  • Shaft-less propulsion systems are quieter than traditional propellers because they shield the blade noise, and reduce the tip speed and intensity of the tip vortices both of which contribute to noise production.
  • Said shaft-less propulsion system may is disposed outside of watercrafts with rotational capability instead of steering unit.
  • Fig. 6 shows a Shaft-less propeller includes a shroud 52; and blades 54.
  • the turbo-machine are used widely in many applications. A large number of the turbo-machine are still designed and produced by conventional methods and their performance and efficiency. Thus it would be possible to detect and diminish the unwanted physical attributes of the flow such as flow separation, friction, cavitation and swirling with smart engineering solutions. Hence, the parameters related to the propeller are directly affecting the performance of the turbo-machine.
  • splitter blades 54 on shroud 52 of shaft-less propeller are one of the techniques in flow field optimization and performance enhancement of rotating machinery. Cross-section of said shroud may be change in the alignment of said shaft-less propeller (not shown), if optimization in hydrodynamic needs changing in diameter of blades and shroud.
  • Shaft-less propellers are quieter than traditional propellers, because shroud shield the blade noise, and eliminate the tip noises of traditional propeller. By reducing propeller blade tip losses, the shaft-less propeller is more efficient in producing thrust than a conventional propeller, especially at low speed and high static thrust level; also in shaft-less turbines is more efficient in absorbing energy.
  • Fig. 7 A shows a Shaft-less propeller includes two main blades 54; two splitter blades 94; and without its shroud 90. In order to increase efficiency in different cases, optimization in arrangement, dimension, curvature and number of main blades and splitter blades are required.
  • Fig. 7B shows a Shaft-less propeller includes three main blades; three splitter blades; and without its shroud 90.
  • Fig. 8 shows the shaft-less propeller 50 that blades 54 rotate together with a shroud 52.
  • a Shaft-less propeller includes a hub 98; blades 54; and without shroud 52. Hub 98 can be used for bearing blades and improve performance in some cases.
  • Fig. 10 shows an Archimedes Shaft-less propeller that includes a hub 98; and an Archimedes Shaft-less blades 100. Archimedes Shaft-less propeller is useful to making or using reciprocating current in turbo-machine or propulsion systems, for example for turbines in tidal current. In hydraulic power storage or other applications, reversible generator-engine may act as both pump and turbine.
  • Shaft-less propeller for propulsion system offer enhanced safety in undersurface of water for blades and sea cables, sharks, whales, etc.
  • water-flooding or water injection is where water is injected into the oil field, usually to increase pressure and thereby stimulate production.
  • Water injection wells can be found both on- and offshore, to increase oil recovery from an existing reservoir. Water is injected to support pressure of the reservoir (also known as voidage replacement), and also to sweep or displace oil from the reservoir, and push it towards a well. Normally only 30% of the oil in a reservoir can be extracted, but water injection increases that percentage (known as the recovery factor) and maintains the production rate of a reservoir over a longer period.
  • Geo-thermal power stations are similar to other steam turbine thermal power stations in that heat from a fuel source (in geo-thermal's case, the Earth's core) is used to heat water or another working fluid. The working fluid is then used to turn a turbine of a generator, thereby producing electricity. The fluid is then cooled and returned to the heat source.
  • a fuel source in geo-thermal's case, the Earth's core
  • the working fluid is then used to turn a turbine of a generator, thereby producing electricity.
  • the fluid is then cooled and returned to the heat source.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une hélice sans arbre mise en œuvre dans des turbines, des pompes et un système de propulsion. Des pales d'une hélice sans arbre sont montées à l'intérieur d'un carénage cylindrique. La conception complexe d'hélice peut être formée et construite à partir de composites haute performance, de métaux, etc. Le carénage réduit les pertes de poussée aux extrémités des pales, et la variation de la section transversale du carénage permet au concepteur d'influer avantageusement sur la vitesse et la pression du flux. Une hélice sans arbre peut être plus efficace qu'une hélice classique. La performance améliorée découle principalement de la possibilité de modification de paramètres tels que le diamètre et la longueur du carénage cylindrique, le nombre de pales pleines, et l'ajout de pales séparatrices, la torsion (courbure) des pales, etc. Les hélices sans arbre peuvent être alimentées par n'importe quelle source de puissance d'arbre par une roue dentée, une transmission par chaîne, une courroie, etc. sur son carénage ou directement par moteur ou générateur électrique dont le rotor peut être directement monté sur son carénage.
PCT/IB2018/055000 2018-07-06 2018-07-06 Turbo-machines sans arbre & systèmes de propulsion WO2020008238A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2018/055000 WO2020008238A1 (fr) 2018-07-06 2018-07-06 Turbo-machines sans arbre & systèmes de propulsion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2018/055000 WO2020008238A1 (fr) 2018-07-06 2018-07-06 Turbo-machines sans arbre & systèmes de propulsion

Publications (1)

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WO2020008238A1 true WO2020008238A1 (fr) 2020-01-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113971317A (zh) * 2021-12-01 2022-01-25 中国船舶科学研究中心 一种轮缘推进系统动态传递力的计算方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487805A (en) * 1966-12-22 1970-01-06 Satterthwaite James G Peripheral journal propeller drive
US20040027020A1 (en) * 2002-08-08 2004-02-12 Newcomb Ronald A. Electro-magnetic archimedean screw motor-generator
WO2012074465A1 (fr) * 2010-11-29 2012-06-07 Examec Holding Ab Propulseur d'étrave

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487805A (en) * 1966-12-22 1970-01-06 Satterthwaite James G Peripheral journal propeller drive
US20040027020A1 (en) * 2002-08-08 2004-02-12 Newcomb Ronald A. Electro-magnetic archimedean screw motor-generator
WO2012074465A1 (fr) * 2010-11-29 2012-06-07 Examec Holding Ab Propulseur d'étrave

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113971317A (zh) * 2021-12-01 2022-01-25 中国船舶科学研究中心 一种轮缘推进系统动态传递力的计算方法
CN113971317B (zh) * 2021-12-01 2023-05-12 中国船舶科学研究中心 一种轮缘推进系统动态传递力的计算方法

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