EP0122726B1 - Fluid contacting surfaces and devices incorporating such surfaces - Google Patents

Fluid contacting surfaces and devices incorporating such surfaces Download PDF

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Publication number
EP0122726B1
EP0122726B1 EP84301804A EP84301804A EP0122726B1 EP 0122726 B1 EP0122726 B1 EP 0122726B1 EP 84301804 A EP84301804 A EP 84301804A EP 84301804 A EP84301804 A EP 84301804A EP 0122726 B1 EP0122726 B1 EP 0122726B1
Authority
EP
European Patent Office
Prior art keywords
axis
fluid
impeller
propeller
contacting surface
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
EP84301804A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0122726A1 (en
Inventor
Robert Davidson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0122726A1 publication Critical patent/EP0122726A1/en
Application granted granted Critical
Publication of EP0122726B1 publication Critical patent/EP0122726B1/en
Expired legal-status Critical Current

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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
    • B63H1/14—Propellers
    • B63H1/26—Blades
    • 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
    • F04D29/181—Axial flow rotors

Definitions

  • This invention relates to fluid-contacting surfaces and devices incorporating such surfaces, and more particularly relates to fluid-contacting surfaces and devices which are arranged to affect, modify or control the flow of fluids, as for example the fluid-contacting surfaces of stationary deflectors or rotatable devices such as turbines, impellers or propellers and the like which may be used for a variety of purposes and applications e.g. as in the pneumatic and hydraulic applications.
  • an axial flow fluid impeller or propeller incorporating at least one fluid-contacting surface generated as aforesaid.
  • the invention further includes the methods of forming the said generating surface and the said stationary deflector and/or axial flow fluid impeller or propeller.
  • FIG. 1 of the drawings this diagrammatically illustrates how a fluid-contacting surface in accordance with the present invention may be generated about a point of origin O of an axis of rotation Z.
  • a generatrix point P defines a radius vector OP
  • transverse axis X extends at right angles to the axis of rotation Z and the angle ⁇ is formed between the X axis and the projection OQ of the radius vector OP onto the XY plane, with the angle Z being formed between the radius vector OP and the XY plane.
  • the parametric equations defining the curve generated by the point P are:
  • the surface may include the full 90° sweep between the transverse axis X and the true axis of rotation Z or a part thereof, or the full 180° sweep from adjacent the axis Z to one side of the point of origin 0 through the transverse axis X to lie adjacent the axis Z at the opposite side of the point of origin 0; and the surface thus formed may be duplicated or otherwise multiplied in providing a plurality of similar fluid-contacting surfaces in continuous or spaced relationship about the axis of rotation Z e.g. as in providing fluid-contacting surfaces on a twin or multi bladed impeller or propeller.
  • the rotatable impeller or propeller may be constructed with a blade 1 formed from such as a thin sheet of metal or other suitable material in initially flat circular disc form of radius equal to the length of the generating line OP and provided with either a single radial slit S or a small sector R, R' cut out, as illustrated by way of example in figure 5 of the drawings; and the whole or part disc form may then be twisted and bent into shape with the radial slit (or sector) edges R, R' disposed in opposition 180° apart to lie on or adjacent the axis of rotation Z of the impeller or propeller.
  • the blades 1' witt sweep through an imaginary sphere A.
  • the invention is not confined to impellers or propellers in which the fluid-contacting surface generating line OP is constant, but by varying the length of such line (e.g. by a gradual increase to a peak followed by a gradual decrease) during formation of the impeller, or by subsequent shaping of the impeller blades once initially formed as before described, impellers or propellers of different shapes and sweeping different shaped volumes can be provided to meet the desired situations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Hydraulic Turbines (AREA)
EP84301804A 1983-03-17 1984-03-16 Fluid contacting surfaces and devices incorporating such surfaces Expired EP0122726B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ203600A NZ203600A (en) 1983-03-17 1983-03-17 Generating a non-planar fluid working surface
NZ203600 1983-03-17

Publications (2)

Publication Number Publication Date
EP0122726A1 EP0122726A1 (en) 1984-10-24
EP0122726B1 true EP0122726B1 (en) 1986-07-09

Family

ID=19920280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301804A Expired EP0122726B1 (en) 1983-03-17 1984-03-16 Fluid contacting surfaces and devices incorporating such surfaces

Country Status (8)

Country Link
EP (1) EP0122726B1 (es)
JP (1) JPS59183001A (es)
AU (1) AU571200B2 (es)
CA (1) CA1229765A (es)
DE (1) DE3460275D1 (es)
MX (1) MX161273A (es)
NZ (1) NZ203600A (es)
ZA (1) ZA842009B (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013115658A1 (en) * 2012-01-31 2013-08-08 Propeller Technology Ltd Propeller

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62500515A (ja) * 1984-10-12 1987-03-05 ロリモント　プロプライエタリー　リミテッド 船舶用プロペラ
WO1986002331A1 (en) * 1984-10-12 1986-04-24 Arnold Clair Virgil Holmberg Propellors for watercraft
CN111498049B (zh) * 2020-04-10 2021-12-21 中船澄西扬州船舶有限公司 一种节能定子的安装方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1017915B (de) * 1955-06-02 1957-10-17 Bergedorfer Eisenwerk Ag Kreiselpumpe fuer fluessige Nahrungsmittel
JPS524940B1 (es) * 1970-02-20 1977-02-08
FR2187030A5 (es) * 1971-07-09 1974-01-11 Crambes Maurice
FR2359294A1 (fr) * 1976-07-23 1978-02-17 Carrouset Pierre Turbine de prehension d'un fluide
NL184075B (nl) * 1978-06-30 1988-11-01 Hva Water Contractors B V Werkwijze voor het bedrijven van een om een draaiingsas draaibare rotor, alsmede rotor bestemd voor het uitvoeren van een dergelijke werkwijze.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013115658A1 (en) * 2012-01-31 2013-08-08 Propeller Technology Ltd Propeller

Also Published As

Publication number Publication date
DE3460275D1 (en) 1986-08-14
AU2557884A (en) 1984-09-20
AU571200B2 (en) 1988-04-14
CA1229765A (en) 1987-12-01
ZA842009B (en) 1984-10-31
EP0122726A1 (en) 1984-10-24
MX161273A (es) 1990-08-27
NZ203600A (en) 1987-03-06
JPS59183001A (ja) 1984-10-18

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