DE344976C - Screw propeller with jacket - Google Patents

Screw propeller with jacket

Info

Publication number
DE344976C
DE344976C DE1920344976D DE344976DA DE344976C DE 344976 C DE344976 C DE 344976C DE 1920344976 D DE1920344976 D DE 1920344976D DE 344976D A DE344976D A DE 344976DA DE 344976 C DE344976 C DE 344976C
Authority
DE
Germany
Prior art keywords
jacket
propeller
screw
blades
screw propeller
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
Application number
DE1920344976D
Other languages
German (de)
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.)
GILL PROPELLER Co Ltd
Original Assignee
GILL PROPELLER Co 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 GILL PROPELLER Co Ltd filed Critical GILL PROPELLER Co Ltd
Application granted granted Critical
Publication of DE344976C publication Critical patent/DE344976C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H1/00Propulsive elements directly acting on water
    • B63H1/02Propulsive elements directly acting on water of rotary type
    • B63H1/12Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14Propellers
    • B63H1/16Propellers having a shrouding ring attached to blades

Landscapes

  • 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)
  • Mixers Of The Rotary Stirring Type (AREA)

Description

Schraubenpropeller mit Mantel. Die Erfindung betrifft einen Schraubenpropeller mit Mantel, wie solche schon früher angewandt wurden, tun .dem Schraubenwasser eine Führung und eine Abgrenzung gegen die nicht von der Schraube erfaßten Wassermassen zu geben. Bei solchen Propellern wurde ,bisher der Mantel .meist getrennt von der Schraube am Schiffskörper befestigt, was insbesondere den Nachteil hat, daß große Verluste infolge der Wasserwirbel in dem Spielraum zwischen Flügelaußenkante und Mantelinnenfläche eintreten. Bei anderen Konstruktionen ließ man auch den Mantel mit :der Schraube umlaufen. Es fehlte diesen Konstruktionen aber an einer möglichst zweckmäßigen Formgebung des Mantels.Screw propeller with jacket. The invention relates to a screw propeller with a coat, as it was used earlier, do one with the screw water Leadership and a demarcation against the water masses not captured by the screw admit. In the case of such propellers, up to now the jacket has mostly been separated from the Screw attached to the hull, which has the particular disadvantage that large Losses due to the water eddies in the Space between the outer edge of the wing and the inner surface of the jacket. Other constructions also left the coat with: revolve around the screw. However, these constructions lacked one as possible appropriate shaping of the jacket.

Erfindungsgemäß ist nun der auf den Schraubenflügeln befestigte Mantel so ausgebildet daß er eine düsenartige, der natürlichen Form des Schraubenstrahles angepaßte Form erhält, die insbesondere so a@bgepaß.t ist, ,daß unter Berücksichtigung der Nabenstärke dem die Düse durchfließenden Schraubenstrom eine gleichmäßig zunehmende Beschleunigung erteilt wird. Es hat sich als zweckmäßig herausgestellt, die Länge des Mantels größer zu wählen als die achsiale Länge der 'Flügel, jedoch kürzer als den Durchmesser des Propellers, und außerdem den Überstand des Mantels über die Schraubenflügel ungleich zu nehmen, nämlich nach ,hinten größer als nach vorn.According to the invention, the jacket attached to the screw wings is now designed so that it has a nozzle-like, the natural shape of the screw jet adapted form, which is in particular so a@bgepaß.t, that taking into account The hub thickness increases evenly with the screw flow flowing through the nozzle Acceleration is granted. It turned out to be useful, the length of the mantle larger than the axial length of the 'wings, but shorter than the diameter of the propeller, and also the protrusion of the jacket over the To take screw wing unequal, namely to the rear larger than to the front.

Ein solcher Propeller hat besonders bei hohen Umdrehungszahlen günstige Ergebnisse gezeigt, indem er einen guten Wirkungsgrad ergab und auch bei geringerer Eintauchtiefe gut arbeitete.Such a propeller is particularly advantageous at high speeds Results shown by giving good efficiency and also at lower levels Immersion depth worked well.

Die Abbildungen zeigen eine beispielsweise Ausführungsform :des Propellers für Schiffsantrieb, nämlich Abb. i einen Längsschnitt, Abb. 2 eine Ansicht von der Vorderseite, also dem Einlaßen@de, Abb.3 eine Ansieht von hinten, also vom Austrittsende.The figures show an example embodiment: the propeller for ship propulsion, namely Fig. i a longitudinal section, Fig. 2 a view of the Front, i.e. the inlet @ de, Fig. 3 a view from the rear, i.e. from the exit end.

Nach der Darstellung hat der Propeller vier Schaufeln A, die an einer zylindrischen Nabe B sitzen, deren hinteres Ende bei B1 stromlinienartig verjüngt ist. An den äußeren Enden der Schaufeln A ist eine .düsenförmige Ring-wand C vorgesehen, welche entweder mit den Schaufeln aus einem Stück i besteht oder an dieser in geeigneter Weise befestigt ist. Die Schaufeln haben vorteilhaft eine wachsende Steigung entsprechend der Beschleunigung des .durch den Düsenring C - gehenden Wassers. Die Länge der Ringwand C kann entsprechend den Anforderungen und Arbeitsbedingungen wechseln. Bei dein .dargestellten Beispiel ist die Länge der Düse in der Achsrichtung ungefähr drei Viertel :des kleinen Durchmessers des Propellers. Das kleinere Auslaßende Cl hat einen Durchmesser, welcher ungefähr o,8 des kleinen Propellerdurchmessers ist. Wie ersichtlich, sind die Schaufeln A nicht in :der Mitte rler Ringwand C angeordnet, sondern einseitig von dieser Mitte etwas nach dem vorderen Ende C2 des Düsenringes verschoben. Die Nabe B kann auch geschlitzt und beringt: sein, um eine gleichmäßige Kontraktion der Wand C zu erzielen, wenn diese mit den Schaufeln aus einem Stück besteht.According to the illustration, the propeller has four blades A attached to one cylindrical hub B, the rear end of which tapers streamlined at B1 is. A nozzle-shaped ring wall C is provided at the outer ends of the blades A, which either consists of one piece i with the blades or in a suitable manner Way is attached. The blades advantageously have a corresponding increasing slope the acceleration of the water passing through the nozzle ring C. The length of the Ring wall C can change according to requirements and working conditions. In the example shown, the length of the nozzle in the axial direction is approximate three quarters: the small diameter of the propeller. The smaller outlet end Cl has a diameter which is approximately 0.8 the small propeller diameter. As can be seen, the blades A are not arranged in the middle of the ring wall C, but on one side from this center somewhat towards the front end C2 of the nozzle ring postponed. The hub B can also be slotted and ringed: to be even Achieve contraction of wall C if this is made in one piece with the blades consists.

Die Leitkante C2 am Einlaßende des Diisenringes ist vorteilhaft mit einer Wölbung nach außen erweitert, während das Hinterende Cl von der Innenseite zugeschärft ist. Wenn der Propeller möglicherweise mit Eis oder anderen Hindernissen in Berührung kommt, welche er -durchschneiden soll, kann die Kante C' sägenförmig ausgeschnitten sein.The leading edge C2 at the inlet end of the nozzle ring is advantageous with a bulge expands outwards, while the rear end Cl from the inside is sharpened. When the propeller may have ice or other obstructions comes into contact, which it is supposed to cut through, the edge C 'can be saw-shaped be cut out.

Der Umriß der Wandung C entspricht der Bahn, welche das durch :die Propellerschaufeln gleichmäßig beschleunigte Wasser nimmt. Wenn ein Propeller, ;der so geformt ist und mit einer Düsenwandung versehen ist, mit hohem Slip arbeitet, wie es beim Schleppen vorkommt, so wenden die radiale Wirkung und die Wirbelverluste verringert, und; der Propeller arbeitet wie eine achsial beaufschlagte Pumpe. Dex Propeller arbeitet auch wirksam bei der Rückwärtsfahrt, wirkt aber dann wie ein gewöhnlicher Propeller in kleinerer Form.The outline of the wall C corresponds to the path which the through: the Propeller blades evenly accelerated water takes. If a propeller,; the is shaped and provided with a nozzle wall, works with high slip, As happens with towing, the radial effect and the vortex losses turn decreased, and; the propeller works like an axially loaded pump. Dex Propeller also works effectively when reversing, but then acts like a ordinary propeller in a smaller form.

Claims (2)

PATFNT-ANSPRÜCHE: i. Schraubenpropeller mit Mantel, dadurch gekennzeichnet, daß der mit ,den Schaufeln umlaufende Mantel an der Innenseite :die Form einer Düse hat, die dem Flüssigkeitsstrom, in dem der Propeller arbeitet, eine gleichmäßig ansteigende BesAleunigung verleiht. PATFNT CLAIMS: i. Screw propeller with jacket, characterized in that that the jacket running around with the blades on the inside: the shape of a nozzle that has a uniform flow of liquid in which the propeller works increasing acceleration. 2. Schraubenpropeller nach Anspruch i, dadurch gekennzeichnet, .daß der Mantel eine achsiale Länge hat, die kleiner ist als der Propellerdurchmesser, aber größer als ,die achsiale Schaufellänge, und daß sein Überstand über die Schaufeln nach hinten größer ist als nach vorn.2. Screw propeller according to claim i, characterized marked, .that the jacket has an axial length which is smaller than the Propeller diameter, but larger than, the axial blade length, and that be The protrusion over the blades to the rear is greater than to the front.
DE1920344976D 1919-07-22 1920-06-23 Screw propeller with jacket Expired DE344976C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB18228/19A GB142713A (en) 1919-07-22 1919-07-22 Improvements in and relating to screw propellers and similar appliances
US389195A US1454967A (en) 1919-07-22 1920-06-15 Screw propeller and similar appliance

Publications (1)

Publication Number Publication Date
DE344976C true DE344976C (en) 1921-12-03

Family

ID=41258144

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1920344976D Expired DE344976C (en) 1919-07-22 1920-06-23 Screw propeller with jacket

Country Status (5)

Country Link
US (1) US1454967A (en)
DE (1) DE344976C (en)
DK (1) DK28897C (en)
FR (1) FR517272A (en)
GB (1) GB142713A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093691B (en) * 1957-08-05 1960-11-24 Eta Corp G M B H Completely or partially encased like a Duesen or arranged in a tunnel propellant, in particular ship propeller, conveyor screw or the like.
DE1203635B (en) * 1962-01-12 1965-10-21 Rudolf Arnold Erren Reaction drive for watercraft
DE102010022070A1 (en) 2010-05-18 2011-11-24 Johann Christian Hofmann Drive unit for watercraft, has driving element comprising drive blades that include convex outer surface edge and concave inner surface edge in cross-section, where drive blades are helically arranged at radial distance around shaft

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595504A (en) * 1943-05-28 1952-05-06 Harold T Avery Means for producing thrust
US4930986A (en) * 1984-07-10 1990-06-05 The Carborundum Company Apparatus for immersing solids into fluids and moving fluids in a linear direction
EP0219364A1 (en) * 1985-08-13 1987-04-22 COMPANIA AUXILIAR DE NAVEGACION S.A. (AUXINAVE) Société dite: Ship propellers
US5620153A (en) * 1995-03-20 1997-04-15 Ginsberg; Harold M. Light aircraft with inflatable parachute wing propelled by a ducted propeller
US5944496A (en) * 1996-12-03 1999-08-31 Cooper; Paul V. Molten metal pump with a flexible coupling and cement-free metal-transfer conduit connection
US5951243A (en) * 1997-07-03 1999-09-14 Cooper; Paul V. Rotor bearing system for molten metal pumps
US6027685A (en) * 1997-10-15 2000-02-22 Cooper; Paul V. Flow-directing device for molten metal pump
US6093000A (en) 1998-08-11 2000-07-25 Cooper; Paul V Molten metal pump with monolithic rotor
US6303074B1 (en) 1999-05-14 2001-10-16 Paul V. Cooper Mixed flow rotor for molten metal pumping device
US6689310B1 (en) 2000-05-12 2004-02-10 Paul V. Cooper Molten metal degassing device and impellers therefor
US6723276B1 (en) 2000-08-28 2004-04-20 Paul V. Cooper Scrap melter and impeller
US7470392B2 (en) 2003-07-14 2008-12-30 Cooper Paul V Molten metal pump components
US7402276B2 (en) 2003-07-14 2008-07-22 Cooper Paul V Pump with rotating inlet
US7731891B2 (en) 2002-07-12 2010-06-08 Cooper Paul V Couplings for molten metal devices
US20070253807A1 (en) 2006-04-28 2007-11-01 Cooper Paul V Gas-transfer foot
US7507367B2 (en) 2002-07-12 2009-03-24 Cooper Paul V Protective coatings for molten metal devices
US20050013715A1 (en) * 2003-07-14 2005-01-20 Cooper Paul V. System for releasing gas into molten metal
US7906068B2 (en) 2003-07-14 2011-03-15 Cooper Paul V Support post system for molten metal pump
US8613884B2 (en) 2007-06-21 2013-12-24 Paul V. Cooper Launder transfer insert and system
US8337746B2 (en) 2007-06-21 2012-12-25 Cooper Paul V Transferring molten metal from one structure to another
US8366993B2 (en) 2007-06-21 2013-02-05 Cooper Paul V System and method for degassing molten metal
US9409232B2 (en) 2007-06-21 2016-08-09 Molten Metal Equipment Innovations, Llc Molten metal transfer vessel and method of construction
US9410744B2 (en) 2010-05-12 2016-08-09 Molten Metal Equipment Innovations, Llc Vessel transfer insert and system
US9156087B2 (en) 2007-06-21 2015-10-13 Molten Metal Equipment Innovations, Llc Molten metal transfer system and rotor
US9205490B2 (en) 2007-06-21 2015-12-08 Molten Metal Equipment Innovations, Llc Transfer well system and method for making same
US9643247B2 (en) 2007-06-21 2017-05-09 Molten Metal Equipment Innovations, Llc Molten metal transfer and degassing system
US10428821B2 (en) 2009-08-07 2019-10-01 Molten Metal Equipment Innovations, Llc Quick submergence molten metal pump
US8444911B2 (en) 2009-08-07 2013-05-21 Paul V. Cooper Shaft and post tensioning device
US8535603B2 (en) 2009-08-07 2013-09-17 Paul V. Cooper Rotary degasser and rotor therefor
US8449814B2 (en) 2009-08-07 2013-05-28 Paul V. Cooper Systems and methods for melting scrap metal
US8524146B2 (en) 2009-08-07 2013-09-03 Paul V. Cooper Rotary degassers and components therefor
US8714914B2 (en) 2009-09-08 2014-05-06 Paul V. Cooper Molten metal pump filter
US9108244B2 (en) 2009-09-09 2015-08-18 Paul V. Cooper Immersion heater for molten metal
US9903383B2 (en) 2013-03-13 2018-02-27 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened top
US9011761B2 (en) 2013-03-14 2015-04-21 Paul V. Cooper Ladle with transfer conduit
US10052688B2 (en) 2013-03-15 2018-08-21 Molten Metal Equipment Innovations, Llc Transfer pump launder system
US10138892B2 (en) 2014-07-02 2018-11-27 Molten Metal Equipment Innovations, Llc Rotor and rotor shaft for molten metal
US10947980B2 (en) 2015-02-02 2021-03-16 Molten Metal Equipment Innovations, Llc Molten metal rotor with hardened blade tips
US10267314B2 (en) 2016-01-13 2019-04-23 Molten Metal Equipment Innovations, Llc Tensioned support shaft and other molten metal devices
US11149747B2 (en) 2017-11-17 2021-10-19 Molten Metal Equipment Innovations, Llc Tensioned support post and other molten metal devices
US20200360990A1 (en) 2019-05-17 2020-11-19 Molten Metal Equipment Innovations, Llc Molten Metal Transfer System and Method
US11873845B2 (en) 2021-05-28 2024-01-16 Molten Metal Equipment Innovations, Llc Molten metal transfer device
US11555608B1 (en) 2021-11-23 2023-01-17 Leron Hollinshed Illuminated two-piece exhibit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093691B (en) * 1957-08-05 1960-11-24 Eta Corp G M B H Completely or partially encased like a Duesen or arranged in a tunnel propellant, in particular ship propeller, conveyor screw or the like.
DE1203635B (en) * 1962-01-12 1965-10-21 Rudolf Arnold Erren Reaction drive for watercraft
DE102010022070A1 (en) 2010-05-18 2011-11-24 Johann Christian Hofmann Drive unit for watercraft, has driving element comprising drive blades that include convex outer surface edge and concave inner surface edge in cross-section, where drive blades are helically arranged at radial distance around shaft

Also Published As

Publication number Publication date
US1454967A (en) 1923-05-15
FR517272A (en) 1921-05-03
GB142713A (en) 1920-05-13
DK28897C (en) 1921-12-05

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