+

WO1996019669A1 - Ventilateur - Google Patents

Ventilateur Download PDF

Info

Publication number
WO1996019669A1
WO1996019669A1 PCT/NL1995/000433 NL9500433W WO9619669A1 WO 1996019669 A1 WO1996019669 A1 WO 1996019669A1 NL 9500433 W NL9500433 W NL 9500433W WO 9619669 A1 WO9619669 A1 WO 9619669A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
blades
hub
skin
ring
Prior art date
Application number
PCT/NL1995/000433
Other languages
English (en)
Inventor
Augustinus Wilhelmus Maria Bertels
Original Assignee
Helpman Intellectual Properties B.V.
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 Helpman Intellectual Properties B.V. filed Critical Helpman Intellectual Properties B.V.
Priority to EP95942786A priority Critical patent/EP0799383A1/fr
Priority to AU44015/96A priority patent/AU4401596A/en
Publication of WO1996019669A1 publication Critical patent/WO1996019669A1/fr

Links

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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/066—Linear Motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • 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
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction

Definitions

  • the invention relates to a fan comprising: a central hub; a plurality of blades connected to this hub and extending at least more or less in radial direction, which blades take a form such that when driven rotatably round the axis of the hub an air displacement occurs; and drive means for rotatably driving the blades with the hub round the axis of the hub.
  • the drive means comprise a motor of not inconsiderable diame ⁇ ter, the output shaft of which motor is joined directly to the hub.
  • the hub likewise has a not inconsiderable diameter adapted to the diameter of the motor.
  • a further significant aspect limiting efficiency is the flow round the ends of the blades, the so-called tips. It would be desirable to eliminate this flow round the tips.
  • a further object of the invention is to embody a fan such that a greater flexibility is obtained in respect of the choice of the or each drive motor, wherein the trans- mission between the rotor, comprising hub and blades, and the motor can be designed such that both the rotor and the motor rotate at the most favourable possible rotation speed.
  • the invention provides a fan of the stated type which has the feature that the end zones of the blades are connected by a ring, which ring is supported rotatably in a housing; and the drive means comprise a motor which is placed at a distance from the hub outside the air flow generated by the driven blades.
  • a specific embodiment is that in which the ring forms part of the drive means.
  • This variant can for instance have the special feature that the ring is driven by a motor.
  • a specific embodiment has the special feature that the ring is the rotor of an optionally collectorless electric motor.
  • a variant of this latter embodiment has the special feature that the rotor is a linear induction motor.
  • the fan according to the invention has the special feature that during operation the rotor is suspended magnetically.
  • a light but nevertheless mechanically very strong embodiment has the special feature that the blades are connected under bias to the hub and the ring.
  • blades each comprise a skin consisting of metal with a thickness of a maximum of 1 mm.
  • a particular embodiment has the special feature that the blades each comprise a skin consisting of a plastic layer reinforced with fibres having tensile strength.
  • the above two embodiments can have the feature that the skin has a thickness of 0.001-0.03 x the average chord of a blade.
  • this latter variant can make use of a very thin skin.
  • the fan can then for instance have the special feature that the skin has a thickness of (0.2 ⁇ 0.1) mm.
  • the embodiment is recommended in which the skin consists of aluminium or stainless steel.
  • the fan can have the special feature that the cavity enclosed by the skin is filled with a filler.
  • This latter embodiment can be manufactured in simple manner.
  • This variant has the special feature that the filler is modelled beforehand in a mould cavity and the skin is subsequently arranged therearound.
  • a still further increase in efficiency can be ob ⁇ tained with an embodiment in which the number of blades amounts to more than four.
  • the number of blades can amount for instance to eight or more.
  • the average thickness of the blades can for instance be in the order of 15% of the chords. In known designs this thickness is in the order of 2 to 3%.
  • the coefficient of resistance c D decreases while the lift coefficient c L can be increased for instance from 0.8 to 1.6.
  • the efficiency of the fan is related to the quotient c L /c D .
  • the fan efficiency can be increased by these steps to the order of magnitude of 90%. In known designs this efficiency lies in the order of magnitude of a maximum of 50%.
  • the decrease of (c ) 0 also contributes to a reduction in the generated sound.
  • the blades will taper toward their ends directed toward the ring.
  • the torsion of the blades can display at the axis a torsion in the order of 15° as seen in the axial direction of the fan, while the blades can have for instance a torsion in the order of 65° at the tips, i.e. the ends adjoining the ring.
  • the latter can have the special feature that at least the inner surface of the ring has an aero ⁇ dynamic form.
  • An embodiment which limits noise and increases efficiency is that in which the end zones of the blades connect smoothly onto the inner surface of the ring.
  • This embodiment can advantageously display the feature that the end zones have a form widening over the whole periphery with a radius of curvature in the same order of magnitude as the characteristic thickness of the blades.
  • a variant in which the blades possess an aerodynamic form with maximized c. I-i/c-,J at a minimized c- U can moreover advantageously have the feature that the blades have a rear edge with a small thickness relative to the aerody ⁇ namic boundary layer during operation of the fan.
  • FIG. 1 shows a partly broken away perspective view of a fan according to the invention in a first embodi ⁇ ment
  • figure 2 shows a partly broken away perspective view of a second embodiment
  • figure 3 shows a partly broken away perspective view of a third embodiment
  • figure 4 shows a longitudinal section through a fourth embodiment
  • figure 5 shows a partly broken away, partly perspec ⁇ tive view of a part of the fan.
  • Figure 1 shows a fan 1 comprising a central hub 2, eight blades 3 connected to this hub 2 and extending at least more or less in radial direction and having a form such that during rotary driving round the axis of hub 2 an air displacement occurs.
  • the end zones 4 of blades 3 are mutually joined by a ring 5 which is supported rota ⁇ tably and drivably in a housing 6.
  • a motor 7 which drives a drive roller 9 via a transmission 8.
  • the roller 9 drives the ring 5 by frictional con ⁇ tact.
  • the latter is further supported by two free guide rollers 10,11 which are arranged spring-mounted in hous ⁇ ing 6 for movement away from and toward ring 5.
  • the inner surface 12 of ring 5 has a rounded aerody ⁇ namic design.
  • FIG. 2 shows a fan 12, the housing 13 of which is adapted to accommodate two rotors 2,3,4,5.
  • the motor 7 drives both rotors.
  • a toothed belt 15 which is driven by a tooth wheel 14 driven by motor 7 and which co-acts with a pinion 16 arranged round each ring 5.
  • Two free-turning tooth wheels 17,18 are mounted fixedly relative to housing 13 and serve for correct positioning of both rotors 2,3,4,5 in combination with the tensile stress in toothed belt 15. Space saving is achieved by using two free-turning deflecting rollers 19,20 whereby the toothed belt engages in substantially horizontal direction on both the upper part and the lower part of the rotors.
  • Figure 3 shows a fan 21, the housing 22 of which is rotatably supported by frame 23.
  • the housing 22 takes a tubular form and has an aerodynamic form on its inner surface 24.
  • a rotor 2,3,4,5 is fixed to this inner sur ⁇ face 24.
  • the ring 15 can be used for production purposes. This could also be omitted, particu ⁇ larly in the case where the blades 3 are joined directly, for instance under bias, to inner surface 24.
  • a stator winding 27 forming part of the frame 23.
  • the housing 22 which, as stated, is rotatable relative to frame 23, carries a crown 28 of magnet means which together with the stator winding 27 form a collectorless electric motor. If de ⁇ sired, this motor can be embodied such that during opera ⁇ tion the housing 22 is suspended electrically.
  • Figure 4 shows a fan 29 with a plastic housing 30 and a guard 31 of metal gauze.
  • the rotor 2,3,4,5 carries magnets 32 which co-act with a stator winding 33 analogously of the embodiment of figure 3.
  • the blades 3 comprise a foam core 34, for instance of plastic such as PUR, with stainless steel skin plates with a thickness in the order of 0.2 mm.
  • the wall of housing 30 comprises a plurality of metal rods 36 glued thereto.
  • the inner surface of housing 30 has a streamlined form as shown in the top left-hand corner of figure 4. For the sake of a low weight use is made of a foam material filling 37.
  • this skin has a thickness which is preferably related to the span width and the chord of these blades.
  • FIG. 5 shows in partly broken away perspective view the structure of the fan blades 3.
  • Each blade 3 comprises a skin 38 modelled to an aerodynamic form such that blade 3 has a convex surface 39 and a concave sur ⁇ face 40. These surfaces are joined to each other via a bent front edge 41 with relatively small radius of curva- ture.
  • the surfaces 39 and 40 mutually overlap. Protruding beyond the overlap zone 43 is that skin part which connects onto the convex surface 39.
  • a protruding rear edge 44 consisting of a thin layer corresponding with the thickness of the skin.
  • the blade 3 is further filled with foam material 45.
  • the end zones of the fan blades connect smoothly onto the inner surface of the ring. These end zones have a form widening over their whole periphery.
  • the radius of curva- ture is more or less constant and has a value in the same order of magnitude as the characteristic thickness of the fan blades.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un ventilateur qui comprend: un moyeu central; une pluralité de pales rattachées à ce moyeu et s'étendant au moins dans une direction relativement radiale; la forme de ces pales est telle que leur rotation autour de l'axe du moyeu entraîne un déplacement d'air; et un système d'entraînement pour mettre en rotation les pales avec le moyeu autour de l'axe du moyeu. Pour le ventilateur décrit, l'invention prévoit un dispositif selon lequel les pales sont reliées entre elles à leur extrémité par un anneau supporté rotatif dans un boîtier; et le système d'entraînement comprend un moteur placé à une certaine distance du moyeu, en dehors de l'écoulement d'air engendré par les pales en rotation.
PCT/NL1995/000433 1994-12-22 1995-12-20 Ventilateur WO1996019669A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95942786A EP0799383A1 (fr) 1994-12-22 1995-12-20 Ventilateur
AU44015/96A AU4401596A (en) 1994-12-22 1995-12-20 Fan

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9402191 1994-12-22
NL9402191A NL9402191A (nl) 1994-12-22 1994-12-22 Ventilator.

Publications (1)

Publication Number Publication Date
WO1996019669A1 true WO1996019669A1 (fr) 1996-06-27

Family

ID=19865060

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1995/000433 WO1996019669A1 (fr) 1994-12-22 1995-12-20 Ventilateur

Country Status (5)

Country Link
EP (1) EP0799383A1 (fr)
AU (1) AU4401596A (fr)
NL (1) NL9402191A (fr)
TW (1) TW307815B (fr)
WO (1) WO1996019669A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU751254B2 (en) * 2000-08-31 2002-08-08 Carrier Corporation Motor cooling fan blade assembly with finger guard
WO2009045108A1 (fr) * 2007-10-04 2009-04-09 Bronswerk Heat Transfer B.V. Ventilateur
EP3147510A4 (fr) * 2014-06-25 2018-03-14 Suk Ho Jang Moto-ventilateur de type en anneau sans noyau pour la ventilation et le refroidissement
EP3759352A1 (fr) * 2017-06-12 2021-01-06 Valeo Systemes Thermiques Ventilateur de vehicule automobile

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE128797C (fr) *
US1996195A (en) * 1933-05-05 1935-04-02 Julian K Ferguson Electric fan
FR1568546A (fr) * 1967-09-08 1969-05-23
DE2113019A1 (de) * 1970-03-19 1971-10-14 Fluor Prod Co Inc Geblaeseschaufel und Geblaeselaeuferbaugruppe
DE2242218A1 (de) * 1972-02-28 1973-09-06 United Aircraft Corp Zusammengesetztes ventilatorblatt und verfahren zu dessen herstellung
DE2211208A1 (de) * 1972-03-08 1973-09-13 Siemens Ag Antrieb eines luefterrades
GB2022703A (en) * 1978-06-09 1979-12-19 Omya Gmbh Fluid flow machine
EP0168594A1 (fr) * 1984-06-27 1986-01-22 Canadian Fram Limited Ventilateur axial
DE3707437A1 (de) * 1986-03-08 1988-03-17 Hans Joachim Leithner Laufrad fuer einen axialventilator
US4962734A (en) * 1990-03-14 1990-10-16 Paccar Inc. Electrically driven, circumferentially supported fan
EP0524863A1 (fr) * 1991-07-26 1993-01-27 Renault Vehicules Industriels Hélice de ventilateur
EP0567688A1 (fr) * 1992-04-30 1993-11-03 Götz Heidelberg Dispositif de transport d'un fluide, en particulier un ventilateur
EP0606054A2 (fr) * 1992-12-28 1994-07-13 Ivan Dipl.-Ing. Sandurkov Dispositif de transport avec roue déplaçant des gaz ou des fluides dans un canal d'écoulement

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE128797C (fr) *
US1996195A (en) * 1933-05-05 1935-04-02 Julian K Ferguson Electric fan
FR1568546A (fr) * 1967-09-08 1969-05-23
DE2113019A1 (de) * 1970-03-19 1971-10-14 Fluor Prod Co Inc Geblaeseschaufel und Geblaeselaeuferbaugruppe
DE2242218A1 (de) * 1972-02-28 1973-09-06 United Aircraft Corp Zusammengesetztes ventilatorblatt und verfahren zu dessen herstellung
DE2211208A1 (de) * 1972-03-08 1973-09-13 Siemens Ag Antrieb eines luefterrades
GB2022703A (en) * 1978-06-09 1979-12-19 Omya Gmbh Fluid flow machine
EP0168594A1 (fr) * 1984-06-27 1986-01-22 Canadian Fram Limited Ventilateur axial
DE3707437A1 (de) * 1986-03-08 1988-03-17 Hans Joachim Leithner Laufrad fuer einen axialventilator
US4962734A (en) * 1990-03-14 1990-10-16 Paccar Inc. Electrically driven, circumferentially supported fan
EP0524863A1 (fr) * 1991-07-26 1993-01-27 Renault Vehicules Industriels Hélice de ventilateur
EP0567688A1 (fr) * 1992-04-30 1993-11-03 Götz Heidelberg Dispositif de transport d'un fluide, en particulier un ventilateur
EP0606054A2 (fr) * 1992-12-28 1994-07-13 Ivan Dipl.-Ing. Sandurkov Dispositif de transport avec roue déplaçant des gaz ou des fluides dans un canal d'écoulement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU751254B2 (en) * 2000-08-31 2002-08-08 Carrier Corporation Motor cooling fan blade assembly with finger guard
WO2009045108A1 (fr) * 2007-10-04 2009-04-09 Bronswerk Heat Transfer B.V. Ventilateur
NL2002057C2 (nl) * 2007-10-04 2009-04-28 Bronswerk Heat Transfer Bv Ventilator.
US8961109B2 (en) 2007-10-04 2015-02-24 Bronswerk Heat Transfer B.V. Fan
EP3147510A4 (fr) * 2014-06-25 2018-03-14 Suk Ho Jang Moto-ventilateur de type en anneau sans noyau pour la ventilation et le refroidissement
EP3759352A1 (fr) * 2017-06-12 2021-01-06 Valeo Systemes Thermiques Ventilateur de vehicule automobile

Also Published As

Publication number Publication date
EP0799383A1 (fr) 1997-10-08
AU4401596A (en) 1996-07-10
NL9402191A (nl) 1996-08-01
TW307815B (fr) 1997-06-11

Similar Documents

Publication Publication Date Title
US7504754B2 (en) Rotor having multiple permanent-magnet pieces in a cavity
US7218011B2 (en) Diffuser-augmented wind turbine
US20070041823A1 (en) Fluid energy converter
EP0928738A2 (fr) Dispositif d'hélice à pas variable
US8070452B2 (en) Blade provided with a horizontally-wound spar, and a method of fabricating such a spar
WO2004047255A3 (fr) Ensemble de moteurs a flux axial
CN1309750A (zh) 齿轮箱体
WO2007137041A2 (fr) Rotor antivibratoire pour machine tournante
EP0799383A1 (fr) Ventilateur
WO2006065248A2 (fr) Eolienne a accroissement de diffusion
US20120107127A1 (en) Fan blade assemlby
CN219447244U (zh) 多级传动结构、动力装置及电动自行车
AU2011333460B2 (en) A wind turbine
CN215934563U (zh) 一种外转子组件及电动机
CN220775487U (zh) 一种无刷电机转子
CN220416153U (zh) 蜗轮
CN222377144U (zh) 分体式齿轮及直升机
CN200989413Y (zh) 轮毂形谐波齿轮减速机
CN116353756A (zh) 多级传动结构、动力装置及电动自行车
CN221995202U (zh) 无刷电机转子及无刷电机
JPH1077994A (ja) 回転翼
WO1996019670A2 (fr) Ventilateur a usage domestique
CN211830525U (zh) 一种用于开关电梯门的隔爆型三相异步电动机
CN110768494A (zh) 一种双转子电机
CN210927338U (zh) 一种微型力矩电机

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TT UA UG US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1995942786

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1995942786

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWW Wipo information: withdrawn in national office

Ref document number: 1995942786

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载