EP0263000B1 - Propellergebläse mit Leitmantel - Google Patents

Propellergebläse mit Leitmantel Download PDF

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Publication number
EP0263000B1
EP0263000B1 EP87401940A EP87401940A EP0263000B1 EP 0263000 B1 EP0263000 B1 EP 0263000B1 EP 87401940 A EP87401940 A EP 87401940A EP 87401940 A EP87401940 A EP 87401940A EP 0263000 B1 EP0263000 B1 EP 0263000B1
Authority
EP
European Patent Office
Prior art keywords
casing
propeller
blades
sleeve
blower according
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 - Lifetime
Application number
EP87401940A
Other languages
English (en)
French (fr)
Other versions
EP0263000A1 (de
Inventor
Bernard Pradelle
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.)
Orano Cycle SA
Original Assignee
Compagnie Generale des Matieres Nucleaires SA
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 Compagnie Generale des Matieres Nucleaires SA filed Critical Compagnie Generale des Matieres Nucleaires SA
Priority to AT87401940T priority Critical patent/ATE59887T1/de
Publication of EP0263000A1 publication Critical patent/EP0263000A1/de
Application granted granted Critical
Publication of EP0263000B1 publication Critical patent/EP0263000B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts

Definitions

  • the invention relates to fans of the type having a tubular air flow guide envelope provided with flow straightening vanes carrying a central assembly comprising, on the one hand, an electric motor provided with an aerodynamic fairing and of which the shaft carries a propeller placed at the front of the blades and, on the other hand, a tubular casing constituting a single piece of casting with the blades and with at least one section of the envelope surrounding the propeller.
  • the present invention aims to provide a fan with an electric motor that can be produced at a cost barely higher than that of conventional industrial fans, having a significantly improved overall efficiency (ratio of useful power to power of the electric motor) and a reduced noise level.
  • the invention provides a fan of the type defined above, characterized in that the part of said section surrounding the propeller is machined concentrically inside said casing and in that the stator of the electric motor is adjusted in a bore of said housing and is in thermal contact with the housing over its entire circumference.
  • the tubular casing, the blades and the envelope section advantageously constitute a single piece of foundry made of a material having a high thermal conductivity.
  • a spheroidal graphite cast iron which is subjected to a heat treatment giving it a good coefficient of elongation and consequently, allowing it to withstand very large temperature variations.
  • the propeller blade is a machined cylindrical segment. Thanks to the use of an attached segment of short axial length, the machining of which can be carried out at the same time as that of the casing receiving the shaft and the bearings of the shaft of the electric motor, it is possible to ensure precise centering. of the propeller and reduce the radial clearance to a value of the order of a tenth of a millimeter, for which the turbulence at the end of the blade is reduced.
  • the segment can be housed in a cylindrical housing delimited by two constituent parts of the internal envelope so that the machined internal face is substantially level with the internal face of the two parts and does not cause a drop which would be a source of turbulence.
  • the segment can be formed from polytetrafluoroethylene and further machined.
  • the internal casing (or at least its central section), the straightening vanes and the casing are produced by foundry.
  • the external envelope can be produced by mechanical welding, that is to say by economic techniques.
  • the internal envelope may be integral with an external envelope separated by a soundproofing material which reduces the external noise level.
  • the reduction in turbulence also has a favorable effect on this level.
  • the fairing of the electric motor may include an inlet cone and an outlet cone reducing the pressure drops and further improving the overall efficiency.
  • the sheath may also include a converging entrance pavilion.
  • the fan shown in Figure 1 can be regarded as comprising a tubular sheath 10 for guiding the air flow and a central assembly supported by the sheath.
  • the sheath 10 is constituted, in the illustrated embodiment, in three sections or successive parts. Each of these parts has an inner wall and an outer wall.
  • the association of the internal walls constitutes an internal envelope 12 limiting the path of air circulation.
  • the external walls constitute an external envelope 14 concentric with the internal envelope and at a constant distance from the latter.
  • the front part of the sheath carries a converging horn 18 which guides the air streams and makes it possible to reduce the pressure losses.
  • This pavilion can be made of repoussé metal and fixed by welding to the internal envelope.
  • the central assembly is carried by the central part of the sheath.
  • this assembly comprises a casing 20 supported and centered in the envelope by the flow straightening vanes 22 and by a set of sails 24.
  • the vanes and the sails are distributed regularly in the circumferential direction.
  • the fixed part of the central assembly comprises the casing 20, to which is attached the stator 25 of an electric motor constituting the motor member of the fan.
  • the casing 20 is extended at the front by an entry cone 26 in the form of a warhead and, at the rear, by a shaped tip 28 so as to reduce the pressure losses.
  • the cone and the tip can be of pushed metal and fixed to the central part of the casing 20, which can be a molded part.
  • the stator 25 is mounted in a one-piece casing carrying bearings 29 on which the shaft 30 of the motor rotates. This shaft in turn carries a propeller 32, placed between the webs 24 and the flow straightening vanes 22, in the axial direction.
  • the profile, the timing and the arrangement of the blades 32 and of the straightening vanes 22 are chosen to optimize the efficiency of the assembly of the propeller and the electric motor for the expected flow.
  • a segment 34 of molded synthetic material is embedded in the internal casing 12, in line with the blades.
  • the segment 34 is machined and this operation is carried out at the same time as the machining of the bearings 29 carrying the shaft 30, that is to say - say with the same reference axis. Under these conditions, the alignment of the propeller and segment axes is precise enough to tolerate a play of the order of a tenth of a millimeter between propeller 32 and segment 34.
  • a fan intended to receive a motor from 5 to 25 kW has been constituted, with a casing 20 of 240 mm in diameter, carried by several blades (for example seventeen) of rectification 22.
  • the stator of the motor was fitted tightly in the central part of the casing 20, which ensures good cooling.
  • the propeller 32 statically and dynamically balanced, was mounted on the shaft 30 by means of a split cone 35 which guarantees the coaxiality of the shaft and the propeller.
  • the fan shown also includes the accessory elements required for its operation.
  • the motor carcass carries at the rear an electrical connection box 36 connected to a connection box 38, carried by the sheath 10, by conductors contained in a profiled tube 40.
  • the fan can also include measuring or safety elements (not shown), for example a pressure sensor located at the inlet of the fan, an engine temperature sensor, etc.
  • the sheath can also be provided with fasteners for receiving an air filter located at the front.
  • FIG. 2 in which the elements corresponding to those of FIG. 1 are designated by the same reference number, also comprises a casting part, advantageously made of spheroidal graphite cast iron, grouping together the casing 20, the blades 22 and the central section of the internal casing 12.
  • the straightening vanes 22 extend over a length exceeding that of the stator 25 of the motor.
  • These blades have a shape (indicated in phantom) adapted to that of the propeller blades 32.
  • the casing 20 is machined internally, concentrically with the part of the internal envelope which directly surrounds the propeller 32. This machining allows centering precision of the flanges 42 which carry the bearings 29 and of the stator 25.
  • the magnetic circuit of the latter is machined at its periphery so as to engage with gentle friction in the bore of the casing 20, where it is immobilized by a simple key 44.
  • a conductive grease is advantageously interposed between the casing and the ferromagnetic carcass of the motor to improve heat transfers.
  • the inlet cone 26 rotates with the propeller of which it is integral.
  • an annular segment of polytetrafluoroethylene in a groove (indicated in dashes) of the envelope section 12.
  • This segment can in particular consist of a section of large diameter polytetrafluoroethylene tube .
  • the segment is then machined concentric with the bore of the casing 20 once in place.
  • the fan can be supplemented with the same elements as those which have been represented in FIG. 1. More generally, it is possible to substitute the provisions of FIG. 2 with those of FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)
  • Separation Of Particles Using Liquids (AREA)
  • Harvester Elements (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Food-Manufacturing Devices (AREA)
  • Cookers (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Claims (8)

1. Ventilator mit einem zur Führung des Luftstromes dienenden rohrförmigen Mantel (12), der mit Strömungsleitflügeln (22) versehen ist, die eine zentrale Baueinheit abstützen, welche einerseits einen mit einer stromlinienförmigen Verkleidung versehenen Elektromotor umfaßt, dessen Welle (30) ein vor den Leitflügeln angeordnetes Flügelrad (32) trägt, und anderseits ein rohrförmiges Gehäuse (20) aufweist, das mit den Leitflügeln (22) und zumindest einem Abschnitt des das Flügelrad (32) umgebenden Mantels ein einziges Gußstück bildet, dadurch gekennzeichnet, daß der das Flügelrad (32) umgebende Mantelabschnitt axial mit dem Inneren des Gehäuses ausgebildet ist und daß der Stator (25) des Elektromotors in der Bohrung des Gehäuses (20) ausgerichtet und über seinen ganzen Umfang in thermischem Kontakt mit dem Gehäuse ist.
2. Ventilator nach Anspruch 1, dadurch gekennzeichnet, daß der den Flügelenden des Flügelrades gegenüberliegende Abschnitt des Innenmantels ein bearbeitetes zylindrisches Segment (34) trägt.
3. Ventilateor nach Anspruch 2, dadurch gekennzeichnet, daß das Segment (34) aus Polytetrafluorethylen geformt und bearbeitet ist.
4. Ventilator nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß sich die Leitflügel (22) axial über die ganze Länge des aktiven Teils des Motors erstrecken.
5. Ventilator nach Anspruch 1, dadurch gekennzeichnet, daß die Verkleidung des Elektromotors einen Anströmkonus (26) und das rohrförmige Gehäuse und einen Abströmkonus (28) aufweist.
6. Ventilator nach Anspruch 1, dadurch gekennzeichnet, daß der rohrförmige Mantel (12) mit einem Außenmantel (14) verbunden und von diesem durch schalldämmendes Material (16) getrennt ist.
7. Ventilator nach Anspruch 6, dadurch gekennzeichnet, daß der äußere Mantel mechanisch geschweißt ist.
8. Ventilator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das einstückige Gußstück aus Kugelgraphitguß ist.
EP87401940A 1986-09-02 1987-08-28 Propellergebläse mit Leitmantel Expired - Lifetime EP0263000B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87401940T ATE59887T1 (de) 1986-09-02 1987-08-28 Propellergeblaese mit leitmantel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8612327 1986-09-02
FR8612327A FR2603350B1 (fr) 1986-09-02 1986-09-02 Ventilateur helicoide a gaine de guidage

Publications (2)

Publication Number Publication Date
EP0263000A1 EP0263000A1 (de) 1988-04-06
EP0263000B1 true EP0263000B1 (de) 1991-01-09

Family

ID=9338639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401940A Expired - Lifetime EP0263000B1 (de) 1986-09-02 1987-08-28 Propellergebläse mit Leitmantel

Country Status (15)

Country Link
US (1) US4780052A (de)
EP (1) EP0263000B1 (de)
AT (1) ATE59887T1 (de)
AU (1) AU611860B2 (de)
CA (1) CA1312318C (de)
DE (1) DE3767263D1 (de)
ES (1) ES2019651B3 (de)
FI (1) FI873797A (de)
FR (1) FR2603350B1 (de)
GR (1) GR3001296T3 (de)
IE (1) IE872322L (de)
IN (1) IN166551B (de)
NO (1) NO166421C (de)
PT (1) PT85634B (de)
ZA (1) ZA876554B (de)

Families Citing this family (17)

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Publication number Priority date Publication date Assignee Title
US5277380A (en) * 1992-06-22 1994-01-11 United Technologies Corporation Toroidal fuselage structure for unmanned aerial vehicles having ducted, coaxial, counter-rotating rotors
DE4334124A1 (de) * 1993-03-04 1994-09-08 Bosch Gmbh Robert Vorrichtung zum Aufnehmen eines Elektromotors
GB9420536D0 (en) * 1994-10-12 1994-11-30 Dunphy Christopher M A destratification fan
US5851105A (en) * 1995-06-28 1998-12-22 General Electric Company Tapered strut frame
FR2908152B1 (fr) * 2006-11-08 2009-02-06 Snecma Sa Aube en fleche de turbomachine
US8282348B2 (en) * 2007-03-05 2012-10-09 Xcelaero Corporation Fan with strut-mounted electrical components
US8622695B2 (en) * 2009-08-12 2014-01-07 Xcelaero Corporation Flow trim for vane-axial fans
FR2973815B1 (fr) 2011-04-07 2014-08-29 Pellenc Sa Souffleur electroportatif autonome a vitesse de sortie d'air modulable
CN102182690A (zh) * 2011-06-08 2011-09-14 扬州大学 复合式贯流泵装置
CN102889242B (zh) * 2012-11-05 2014-12-10 李起武 一种风扇
BR102014017335B1 (pt) * 2014-07-14 2020-08-25 Marchesan Implementos E Máquinas Agrícolas Tatú S.A. rotor para um conjunto exaustor de uma máquina agrícola
CN105402165A (zh) * 2014-09-09 2016-03-16 苏州金莱克精密机械有限公司 吹风机
US10669008B2 (en) * 2015-03-31 2020-06-02 Vantage Robotics, Llc Propeller-motor assembly for efficient thermal dissipation
CA2960405C (en) 2015-06-12 2023-09-19 Tti (Macao Commercial Offshore) Limited Axial fan blower
CN105422481A (zh) * 2015-11-30 2016-03-23 王庆昌 水驱无电排风机排风总成
CN105715586B (zh) * 2016-01-19 2017-09-08 扬州大学 一种灯泡体前置式贯流泵装置进水流道及应用方法
FR3062757B1 (fr) * 2017-02-03 2019-04-05 Alstom Transport Technologies Moteur auto-ventile silencieux, notamment pour un vehicule ferroviaire

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US2040452A (en) * 1934-03-23 1936-05-12 Troller Theodor Fan construction
US2308685A (en) * 1940-11-14 1943-01-19 B F Sturtevant Co Spin neutralizing vane
US2488945A (en) * 1944-05-05 1949-11-22 Joy Mfg Co Fan and motor support
FR998558A (fr) * 1945-10-29 1952-01-21 Fournier Et Mouillon Ets Perfectionnements aux ventilateurs d'aérage des mines
US2541251A (en) * 1948-04-29 1951-02-13 Anemostat Corp America Portable electric fan
FR1068395A (fr) * 1951-12-21 1954-06-24 Power Jets Res & Dev Ltd Perfectionnements apportés aux aubes de turbines
US2879936A (en) * 1955-12-16 1959-03-31 Westinghouse Electric Corp Elastic fluid apparatus
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Also Published As

Publication number Publication date
NO166421B (no) 1991-04-08
ZA876554B (en) 1988-11-30
US4780052A (en) 1988-10-25
FR2603350A1 (fr) 1988-03-04
NO873645D0 (no) 1987-08-28
IN166551B (de) 1990-06-09
AU7774487A (en) 1988-03-10
NO166421C (no) 1991-07-17
FI873797A0 (fi) 1987-09-01
ES2019651B3 (es) 1991-07-01
GR3001296T3 (en) 1992-08-26
PT85634A (pt) 1988-10-14
DE3767263D1 (de) 1991-02-14
FI873797A (fi) 1988-03-03
IE872322L (en) 1988-03-02
CA1312318C (fr) 1993-01-05
PT85634B (pt) 1993-07-30
EP0263000A1 (de) 1988-04-06
NO873645L (no) 1988-03-03
AU611860B2 (en) 1991-06-27
ATE59887T1 (de) 1991-01-15
FR2603350B1 (fr) 1991-03-29

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