DE344976C - Screw propeller with jacket - Google Patents
Screw propeller with jacketInfo
- 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
Links
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
- B63H1/14—Propellers
- B63H1/16—Propellers 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)
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)
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 (44)
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 |
US20050013715A1 (en) | 2003-07-14 | 2005-01-20 | Cooper Paul V. | System for releasing gas into molten metal |
US7402276B2 (en) | 2003-07-14 | 2008-07-22 | Cooper Paul V | Pump with rotating inlet |
US7507367B2 (en) | 2002-07-12 | 2009-03-24 | Cooper Paul V | Protective coatings for molten metal devices |
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 |
US7906068B2 (en) | 2003-07-14 | 2011-03-15 | Cooper Paul V | Support post system for molten metal pump |
US9409232B2 (en) | 2007-06-21 | 2016-08-09 | Molten Metal Equipment Innovations, Llc | Molten metal transfer vessel and method of construction |
US8613884B2 (en) | 2007-06-21 | 2013-12-24 | Paul V. Cooper | Launder transfer insert and system |
US9643247B2 (en) | 2007-06-21 | 2017-05-09 | Molten Metal Equipment Innovations, Llc | Molten metal transfer and degassing system |
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 |
US8337746B2 (en) | 2007-06-21 | 2012-12-25 | Cooper Paul V | Transferring molten metal from one structure to another |
US9205490B2 (en) | 2007-06-21 | 2015-12-08 | Molten Metal Equipment Innovations, Llc | Transfer well system and method for making same |
US8366993B2 (en) | 2007-06-21 | 2013-02-05 | Cooper Paul V | System and method for degassing molten metal |
US8444911B2 (en) | 2009-08-07 | 2013-05-21 | Paul V. Cooper | Shaft and post tensioning device |
US8524146B2 (en) | 2009-08-07 | 2013-09-03 | Paul V. Cooper | Rotary degassers and components therefor |
US10428821B2 (en) | 2009-08-07 | 2019-10-01 | Molten Metal Equipment Innovations, Llc | Quick submergence molten metal pump |
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 |
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 |
US11858036B2 (en) | 2019-05-17 | 2024-01-02 | Molten Metal Equipment Innovations, Llc | System and method to feed mold with molten metal |
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 |
US12146508B2 (en) | 2022-05-26 | 2024-11-19 | Molten Metal Equipment Innovations, Llc | Axial pump and riser |
-
1919
- 1919-07-22 GB GB18228/19A patent/GB142713A/en not_active Expired
-
1920
- 1920-06-15 US US389195A patent/US1454967A/en not_active Expired - Lifetime
- 1920-06-16 FR FR517272A patent/FR517272A/en not_active Expired
- 1920-06-23 DE DE1920344976D patent/DE344976C/en not_active Expired
- 1920-06-25 DK DK28897D patent/DK28897C/en active
Cited By (3)
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 |
---|---|
FR517272A (en) | 1921-05-03 |
GB142713A (en) | 1920-05-13 |
DK28897C (en) | 1921-12-05 |
US1454967A (en) | 1923-05-15 |
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