EP0486539B1 - Ventilateur a moteur electrique - Google Patents

Ventilateur a moteur electrique Download PDF

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Publication number
EP0486539B1
EP0486539B1 EP19900911759 EP90911759A EP0486539B1 EP 0486539 B1 EP0486539 B1 EP 0486539B1 EP 19900911759 EP19900911759 EP 19900911759 EP 90911759 A EP90911759 A EP 90911759A EP 0486539 B1 EP0486539 B1 EP 0486539B1
Authority
EP
European Patent Office
Prior art keywords
vanes
wheel
impeller
vane
circumference
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
EP19900911759
Other languages
German (de)
English (en)
Other versions
EP0486539A1 (fr
Inventor
Konrad Bisser
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.)
Metrax GmbH
Original Assignee
Metrax GmbH
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Filing date
Publication date
Application filed by Metrax GmbH filed Critical Metrax GmbH
Publication of EP0486539A1 publication Critical patent/EP0486539A1/fr
Application granted granted Critical
Publication of EP0486539B1 publication Critical patent/EP0486539B1/fr
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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/164—Multi-stage fans, e.g. for vacuum cleaners
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary 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
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Definitions

  • the invention relates to a blower with an electric motor and at least one impeller on the motor shaft, which is arranged in front of the electric motor in a housing cap with a central suction opening and feeds the sucked-in air through the engine compartment through outlet openings,
  • the impeller consists of an impeller disk that is rotationally fixed is connected to the motor shaft and, on the side facing the suction side, carries vanes which are evenly distributed over the circumference, in which the vanes on the suction side are closed with a wing washer which is flush with the outer periphery of the impeller disk and the inner ends of the vanes and a central one Has recess which corresponds in cross section essentially to the suction opening of the housing cap.
  • a blower of this type is known from DE-A 14 03 032.
  • the operation is associated with high running noises, especially when a large delivery rate is desired.
  • vanes are concavely recessed on the end faces facing the circumference of the impeller, that the parabolic recesses of the vanes run into the peripheral edges of the impeller disk and the vane ring disk and that the vanes are concave on the leading side and are correspondingly convex on the trailing side.
  • This configuration of the wing cutouts alone reduces the noise even with a high delivery rate.
  • two impellers are arranged on the motor shaft, which are located on both sides of an annular stator connected to the housing cap, which is led to the motor shaft down to an annular gap, the circumference of which is at a distance from the housing cap and that is constructed essentially like an impeller.
  • the impeller facing the suction opening acts as a suction impeller and the impeller facing the electric motor acts as a pressure impeller.
  • the idler leads the air sucked in by the suction wheel to the central inlet of the pressure wheel.
  • the structure of the stator is preferably such that the stator is composed of two ring disks, between which vanes are arranged, as in the case of the impeller, and that the vanes of the stator are concavely recessed on both end faces.
  • the axial fan has the electric motor 10, which is closed on the outlet side with the outlet connection 35.
  • the motor bearing 13 is screwed, which is used to support the motor shaft.
  • the two-part housing cap 15, 16 is connected, which form chambers for the impellers 18 and 24 of the two-stage axial fan.
  • the housing cap 16 has the suction opening centrally the two-part housing cap 15, 16 connected to form the chambers for the impellers 18 and 24 of the two-stage axial fan.
  • the housing cap 16 has the suction opening 17 centrally.
  • the engine compartment 32 is connected to the chambers 30 and 31 of the housing cap 15, 16 via the engine mount 13, since the central bearing part of the engine mount 13 is connected to the annular fastening part of the engine mount 13 only via radial webs 14.
  • the impeller consists of the impeller disk 19, which is pushed onto the motor shaft 11 with the bore 34 and is fixed thereon in a rotationally fixed manner with the spacer bushings 12.
  • Leaf-shaped, somewhat curved blades 21, 21 'and 21''with one longitudinal edge are firmly attached to the impeller disk 19.
  • the concave side of the vanes faces the leading side and the convex side of the vanes faces the trailing side of the impeller 18.
  • the impeller 18 facing the suction side is closed with the impeller 20.
  • the vane washer 20 is fixedly connected to the other longitudinal edge of the vanes 21, 21 'and 21''and is flush on the circumferential side and with its central recess 33 flush with the vane wheel disk 19 and the inner ends of the vanes 21, 21' and 21 ''.
  • the end faces of the blades facing the circumference of the impeller 18 are provided with cutouts 22, 22 'and 22''which form concave edges.
  • the cutouts 22, 22 ′ and 22 ′′ are symmetrical toward a central plane between the impeller disk 19 and the washer disk 20 and run into the peripheral edges of the impeller disk 19 and the washer disk 20.
  • the cutouts 22, 22 'and 22'' are preferably parabolic.
  • the central recess 33 of the wing washer 20 is approximately adapted to the size of the central suction opening 17 of the housing cap 15, 16.
  • the construction of the impeller 24 serving as a pressure wheel is identical to the construction of the impeller 18, as the impeller disk 25, the vane ring disk 26 and the vanes 27 with the cutouts 28 show.
  • the stator 23 is arranged, which is fastened to the housing cap 15, 16 and only leaves the small annular gap 29 exposed to the motor shaft 11.
  • the air sucked in via the suction opening 17 leaves the impeller 18 on the circumferential side and is sucked back by the impeller 24 via the stator 23 from the circumferential region into the central region of the chamber 30. From there, the air passes the impeller 24 and is pressed into the engine compartment 32 via the engine mount 13 until the air finally leaves the engine compartment 32 via the outlet connection 35.
  • the stator 23 is constructed from two impeller washers and vanes similar to the impellers 18 and 24.
  • the wings can also have concave cutouts on the end faces.
  • the following values were measured: power consumption 800W, delivery rate 600 liters per minute at a pressure of 150 mbar, speed 25,000 rpm and noise level 62 to 64 dB (A). This results in an average noise reduction of approx. 8 dB (A) compared to comparable devices with other impellers.
  • the blower can be designed both as an axial blower and as a bypass blower.

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

Abstract

Un ventilateur comporte un moteur électrique (10) et au moins un rotor (18, 24) sur l'arbre de moteur (11), qui est monté devant le moteur électrique (10) dans un cache de carter (16) pourvu d'une ouverture d'aspiration centrale (17) et amène à des ouvertures de sorties par-delà le compartiment moteur (32) l'air aspiré. Dans le but d'obtenir un débit important et un fonctionnement plus silencieux, le rotor (18, 24) comporte un disque (19, 25) solidaire en rotation avec l'arbre de moteur (11), et des pales (22, 22', 22') sont uniformément réparties sur la circomférence du côté tourné vers l'admission; les pales tournées côté admission sont entourées par une plaque annulaire (20, 26) qui affleure la circonférence extérieure du disque de rotor et les extrémités intérieures des pales (22, 22', 22'); la plaque annulaire (20, 26) possède un évidement central (33) dont la section est sensiblement égale à celle de l'ouverture d'admission (17) du cache de carter (16); et les faces frontales des pales (22, 22', 22') tournées vers la périphérie du rotor sont concaves.

Claims (3)

  1. Ventilateur comportant un moteur électrique (10) et au moins une roue à ailettes (18 ou 24) sur l'arbre d'entraînement (11) du moteur qui est disposée devant le moteur électrique (10) dans un capot du carter (15, 16) présentant un orifice d'aspiration (17) central et qui amène l'air aspiré à travers l'espace du moteur (32) à des orifices de sortie, dont la roue à ailettes (18 ou 24) se compose d'un disque de roue à ailettes (19 ou 25) qui est relié de manière solidaire en rotation à l'arbre d'entraînement (11) du moteur et qui porte sur le côté tourné vers le côté d'aspiration des ailettes (21 ou 27) uniformément réparties sur le pourtour, dont les ailettes (21 ou 27) tournées vers le côté d'aspiration sont terminées par un disque annulaire à ailettes (20 ou 26) qui se termine en alignement avec le pourtour extérieur du disque de roue à ailettes (19 ou 25) et avec les extrémités intérieures des ailettes (21 ou 27) et qui présente un orifice (33) central dont la section transversale correspond pour l'essentiel à l'orifice d'aspiration (17) du capot du carter (15, 16), caractérisé en ce que les ailettes (21 ou 27) sont évidées de manière concave sur les faces frontales tournées vers le pourtour de la roue à ailettes (18 ou 24), en ce que les évidements (22, 22', 22'' ou 28) des ailettes (21 ou 27) réalisés de façon parabolique se terminent dans les bords périphériques des disques de roues à ailettes (19 ou 25) et des disques annulaires à ailettes (20 ou 26), et en ce que les ailettes (21 ou 27) sont réalisées de façon concave sur le côté d'attaque et de façon convexe sur le côté de fuite.
  2. Ventilateur selon la revendication 1, caractérisé en ce que sur l'arbre d'entraînement (11) du moteur sont disposées deux roues à ailettes (18, 24) qui se situent de part et d'autre d'une roue directrice (23) annulaire reliée au capot du carter (15, 16) qui est séparée de l'arbre d'entraînement (11) du rotor par une fente annulaire (29), dont le pourtour se trouve à distance du capot du carter (15, 16), et qui est construite pour l'essentiel comme une roue à ailettes (18 ou 24).
  3. Ventilateur selon la revendication 1 ou 2, caractérisé en ce que la roue directrice (23) se compose de deux disques annulaires entre lesquels sont disposées des ailettes, comme dans le cas de la roue à ailettes (18 ou 24), et en ce que les ailettes de la roue directrice (23) sont évidées de manière concave sur les deux faces frontales.
EP19900911759 1989-08-10 1990-08-04 Ventilateur a moteur electrique Expired - Lifetime EP0486539B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3926456 1989-08-10
DE19893926456 DE3926456A1 (de) 1989-08-10 1989-08-10 Geblaese mit einem elektromotor

Publications (2)

Publication Number Publication Date
EP0486539A1 EP0486539A1 (fr) 1992-05-27
EP0486539B1 true EP0486539B1 (fr) 1994-03-02

Family

ID=6386878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900911759 Expired - Lifetime EP0486539B1 (fr) 1989-08-10 1990-08-04 Ventilateur a moteur electrique

Country Status (3)

Country Link
EP (1) EP0486539B1 (fr)
DE (1) DE3926456A1 (fr)
WO (1) WO1991002163A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2679828A2 (fr) 2012-06-29 2014-01-01 BSH Bosch und Siemens Hausgeräte GmbH Ventilateur d'aspirateur et aspirateur doté d'un ventilateur d'aspirateur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006161803A (ja) * 2004-12-09 2006-06-22 Samsung Kwangju Electronics Co Ltd 掃除機用インペラーおよびこれを有するモータ組立体
US8057185B2 (en) 2008-02-11 2011-11-15 Lau Industries Forward swept centrifugal fan wheel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR648371A (fr) * 1927-06-20 1928-12-08 Sev Marchal Perfectionnements aux turbines centrifuges pour aspiration ou soufflage
US2091537A (en) * 1933-12-13 1937-08-31 Electrolux Corp Vacuum cleaner
DE1016888B (de) * 1952-02-23 1957-10-03 Maschf Augsburg Nuernberg Ag Laufrad fuer Radialverdichter
NL196239A (fr) * 1954-08-07
US2915237A (en) * 1956-06-13 1959-12-01 Electrolux Corp Centrifugal blowers
US3245610A (en) * 1964-01-02 1966-04-12 Ametek Inc Motor-fan unit for vacuum cleaners
NL7015615A (fr) * 1970-10-24 1972-04-26

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2679828A2 (fr) 2012-06-29 2014-01-01 BSH Bosch und Siemens Hausgeräte GmbH Ventilateur d'aspirateur et aspirateur doté d'un ventilateur d'aspirateur
DE102012211250A1 (de) * 2012-06-29 2014-01-02 BSH Bosch und Siemens Hausgeräte GmbH Staubsaugergebläse und Staubsauger mit einem Staubsaugergebläse

Also Published As

Publication number Publication date
EP0486539A1 (fr) 1992-05-27
WO1991002163A1 (fr) 1991-02-21
DE3926456C2 (fr) 1991-06-27
DE3926456A1 (de) 1991-02-14

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