EP0040532A1 - Konstruktion von Ventilatorflügeln - Google Patents

Konstruktion von Ventilatorflügeln Download PDF

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Publication number
EP0040532A1
EP0040532A1 EP81302184A EP81302184A EP0040532A1 EP 0040532 A1 EP0040532 A1 EP 0040532A1 EP 81302184 A EP81302184 A EP 81302184A EP 81302184 A EP81302184 A EP 81302184A EP 0040532 A1 EP0040532 A1 EP 0040532A1
Authority
EP
European Patent Office
Prior art keywords
fan
angle
attack
blades
shape memory
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.)
Withdrawn
Application number
EP81302184A
Other languages
English (en)
French (fr)
Inventor
Anthony Geoffrey Plackett
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.)
Electrical and Musical Industries Ltd
Original Assignee
Kenwood Manufacturing 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 Kenwood Manufacturing Co Ltd filed Critical Kenwood Manufacturing Co Ltd
Publication of EP0040532A1 publication Critical patent/EP0040532A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation
    • F04D29/368—Adjustment by differences of temperature

Definitions

  • the present invention relates to fans, and in particular to fans suitable for cooling engines or motors.
  • a rotary fan having blades constructed of shape memory material and capable of assuming a first angle of attack at temperatures below a threshold value and a second angle of attack, greater than the first, at a temperature above said threshold value.
  • a fan which may be used for cooling an engine or motor, in which the blades have a small angle of attack at ambient temperatures, and due to being made of a shape memory material, for example shape memory brass or a copper-zinc-aluminium alloy known as "Betalloy N-1040" and manufactured by Raychem Inc. of California, U.S.A., will deform to give a normal fan angle of attack at a temperature above a particular threshold value.
  • a threshold value suitable for use with an electric motor, is 50 to 70 o C.
  • the fan is advantageously punched out from sheet metal shape memory material so as to have a disc form at ambient temperature.
  • an elevated temperature for example 50 to 70°C, then provided that the fan has an appropriate construction history, the punched out blades of the disc will incline to the desired fan angle, so that air is projected over the windings of the motor.
  • the "fan” when the motor starts off, the "fan" will be essentially disc-shaped, and will make substantially no noise.
  • the motor itself will increase in temperature, and the fan will also increase in temperature, because it will be connected thereto directly.
  • the fan blades will then begin to alter or form due to the shape memory characteristics of the metal, and this will project air over the armature, thus cooling it down.
  • the motor operates at full speed, the actual rotation of the motor will itself induce . a cooling, and the current demand will be greatly reduced, in any event, so that the requirement for a fan will drop.
  • the temperature of the armature will drop, and the "fan” will reassume its disc-like configuration, thus reducing significantly the noise.
  • the angle of attack will, of course, then be zero. It is possible, however, for the blades to have a smaller than normal angle of attack at ambient temperature.
  • the fan is initially formed (Fig. 1(a)) as a flat disc 1 with radial slots such as 2 defining the blades, such as 3, of the fan.
  • a central boss 4 is provided, and this member may or may not be formed of shape memory material. It can be advantageous for the boss 4 to be formed of material of high thermal conductivity so as to assist heat flow to the vicinity of the blades.
  • the blades are twisted, by cold or hot shaping, to form blades with a normal angle of attack for such fans (e.g.25° - 35 0 ).
  • the so formed fan is then heated to give austenitic crystal structure (beta or parent phase) then rapidly cooled, or subjected to stress whose magnitude is related to temperature, to give crystal form of martensite.
  • the fan is re-formed, at room temperature, into a disc-shaped plate (i.e. matensite under stress).
  • the structure is "trained” by repeating several times the foregoing sequence of "betatizing”. quenching, deforming and then betatizing again.
  • the fan' assumes its disc-like shape at relatively low temperatures but reverts to this fan-like form, with angle of attack 25 0 - 35°, when its temperature is raised to, say, 50°C to 70°C.
  • a blade angle of 30° corresponds to:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP81302184A 1980-05-20 1981-05-18 Konstruktion von Ventilatorflügeln Withdrawn EP0040532A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8016582 1980-05-20
GB8016582 1980-05-20

Publications (1)

Publication Number Publication Date
EP0040532A1 true EP0040532A1 (de) 1981-11-25

Family

ID=10513531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81302184A Withdrawn EP0040532A1 (de) 1980-05-20 1981-05-18 Konstruktion von Ventilatorflügeln

Country Status (3)

Country Link
EP (1) EP0040532A1 (de)
JP (1) JPS5710798A (de)
AU (1) AU7068881A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530886A1 (fr) * 1982-04-28 1984-01-27 Mitsubishi Electric Corp Generateur pour un vehicule avec ventilateur de refroidissement
GB2184168A (en) * 1985-12-04 1987-06-17 Mtu Muenchen Gmbh Use of shape-memory alloy components to operate gas turbine engine elements
EP1247992A1 (de) * 2001-03-16 2002-10-09 C.R.F. Società Consortile per Azioni Formgedächtnisspropeller oder -ventilator
EP2078865A2 (de) 2008-01-09 2009-07-15 Rosati Fratelli S.r.l. Ventilator mit variabler Geometrie und Verfahren zur Herstellung von deren Schaufeln
US11668316B1 (en) * 2022-01-07 2023-06-06 Hamilton Sundstrand Corporation Rotor formed of multiple metals

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5999098A (ja) * 1982-11-26 1984-06-07 Matsushita Electric Ind Co Ltd 空気調和機の送風装置
JPS6127917U (ja) * 1984-07-23 1986-02-19 本田技研工業株式会社 冷却フアン
JPS6365894U (de) * 1986-10-20 1988-04-30
JPH0226697A (ja) * 1988-07-16 1990-01-29 Nomura Kiko:Kk ヘドロ状物の脱水方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112261A1 (de) * 1971-03-13 1972-09-14 Battelle Institut E V Kuehlerventilator
US3764227A (en) * 1972-08-11 1973-10-09 Hayes Albion Corp Temperature sensitive fan
FR2351446A1 (fr) * 1976-05-10 1977-12-09 Delta Materials Research Ltd Organe de commande sensible a la temperature

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112261A1 (de) * 1971-03-13 1972-09-14 Battelle Institut E V Kuehlerventilator
US3764227A (en) * 1972-08-11 1973-10-09 Hayes Albion Corp Temperature sensitive fan
FR2351446A1 (fr) * 1976-05-10 1977-12-09 Delta Materials Research Ltd Organe de commande sensible a la temperature
GB1573204A (en) * 1976-05-10 1980-08-20 Delta Materials Research Ltd Temperature responsive actuators

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Machine Design, Vol. 51, October 1979, Nr. 24 Cleveland, US D.T. CURRY: "New uses for Metals that Remember", pages 113-117 * pages 114,115 * *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530886A1 (fr) * 1982-04-28 1984-01-27 Mitsubishi Electric Corp Generateur pour un vehicule avec ventilateur de refroidissement
GB2184168A (en) * 1985-12-04 1987-06-17 Mtu Muenchen Gmbh Use of shape-memory alloy components to operate gas turbine engine elements
US4740138A (en) * 1985-12-04 1988-04-26 MTU Motoren-und Turbinen-Munchen GmbH Device for controlling the throat areas between the diffusor guide vanes of a centrifugal compressor of a gas turbine engine
US4752182A (en) * 1985-12-04 1988-06-21 Mtu Motoren-Und Turbinen-Munench Gmbh Device for the open- or closed-loop control of gas turbine engines or turbojet engines
GB2184168B (en) * 1985-12-04 1989-10-11 Mtu Muenchen Gmbh Diffusor guide vane having a device for open-or closed-loop control of a gas turbine.
EP1247992A1 (de) * 2001-03-16 2002-10-09 C.R.F. Società Consortile per Azioni Formgedächtnisspropeller oder -ventilator
EP2078865A2 (de) 2008-01-09 2009-07-15 Rosati Fratelli S.r.l. Ventilator mit variabler Geometrie und Verfahren zur Herstellung von deren Schaufeln
US8092188B2 (en) 2008-01-09 2012-01-10 Rosati Fratelli S.R.L. Variable geometry fan and method for manufacturing the blades thereof
US11668316B1 (en) * 2022-01-07 2023-06-06 Hamilton Sundstrand Corporation Rotor formed of multiple metals

Also Published As

Publication number Publication date
JPS5710798A (en) 1982-01-20
AU7068881A (en) 1982-07-15

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE FR GB IT NL

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19820302

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PLACKETT, ANTHONY GEOFFREY