EP0805277B1 - Kreisellüfter - Google Patents

Kreisellüfter Download PDF

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Publication number
EP0805277B1
EP0805277B1 EP96107007A EP96107007A EP0805277B1 EP 0805277 B1 EP0805277 B1 EP 0805277B1 EP 96107007 A EP96107007 A EP 96107007A EP 96107007 A EP96107007 A EP 96107007A EP 0805277 B1 EP0805277 B1 EP 0805277B1
Authority
EP
European Patent Office
Prior art keywords
volute
single block
ventilator
impeller
centrifugal ventilator
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
EP96107007A
Other languages
English (en)
French (fr)
Other versions
EP0805277A1 (de
Inventor
Germano Marchi
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.)
IDR Holding SA
Original Assignee
IDR Holding 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 IDR Holding SA filed Critical IDR Holding SA
Priority to EP96107007A priority Critical patent/EP0805277B1/de
Priority to DE69617205T priority patent/DE69617205T2/de
Priority to AT96107007T priority patent/ATE209303T1/de
Publication of EP0805277A1 publication Critical patent/EP0805277A1/de
Application granted granted Critical
Publication of EP0805277B1 publication Critical patent/EP0805277B1/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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings

Definitions

  • the invention relates in particular to the field of centrifugal ventilators for industrial use, which are destined to generate considerable, generally low-pressure, air flows, and which are called upon to function continuously in work areas containing several personnel.
  • ventilators are provided with an impeller, normally set in rotation by a motor, and rotating internally of a volute usually realized by means of a shell which can be made by casting, though since construction of this type of ventilator is especially economical, more frequently the shell is made of specially fashioned sheet metal.
  • the prior art also comprises centrifugal ventilators as described in the preamble of claim 1.
  • DE 1503610 discloses such a centrifugal ventilator, wherein an involute or scroll-shaped surface of the airflow passage is formed substantially wholly from a self-coherent, air permeable sound absorbing medium, such as expanded polyurethane.
  • the air-permeable medium is contained in an enclosure having airimpermeable walls provided with inlet and outlet openings.
  • a fan casing is provided with guide ducts for the medium to be conveyed.
  • the fan casing consists of a casing block made of sound absorbing material, such as a porous plastic of a predetermined hardness, and of two cover plates at the end faces which accommodate the casing block between them and of which at least one can likewise consist of sound absorbing material.
  • FR 2469770 discloses an impeller which rotates internally of a volute made as an impression in a single block of plastic material having a right parallelepipedic shape.
  • the main aim of the present invention is to obviate the above-described limits and drawbacks in the prior art, by providing a centrifugal ventilator which is constructionally simple and economical and which generates, during functioning, only limited noise.
  • Some of the advantages of the invention are its compactness, its simplicity of manufacture and installation, and the fact of being able to vary the external geometry of the ventilator in such a way as to eliminate possible noise determined by special installation and functioning conditions.
  • 10 denotes in its entirety a centrifugal ventilator provided with an impeller 2 which rotates internally of a volute 3.
  • the volute 3 is afforded is a single block 1 of plastic material (preferably polyeurethane), provided with an external shape which is different to the shape of the volute 3. It has been demonstrated that the combination of the above-mentioned characteristics (especially the use of a plastic material and the adoption of an external shape which does not follow the shape of the volute 3) produces a reduction in the number of vibrations and noises created by the ventilator 10 during use, and, at the same time, enables the ventilator 10 to be made extremely simply and economically.
  • plastic material preferably polyeurethane
  • the single block 1 preferably has a parallelepiped shape, with a flat inferior surface that enables it to be placed on a support plane, for which reason the ventilator 10 is self-standing.
  • a cover 4 for closing the volute 3 is also provided (not shown in figure 1 for reasons of clarity of illustration).
  • the volute 3 afforded in the single block 1 exhibits on one side an aperture 9, coaxial to the impeller 2, through which a shaft 8 (for driving the impeller 2) of a motor 7 can pass.
  • the aperture 9 can be conformed in such a way as to house therein a support for the shaft 8.
  • a recess complete with ventilation apertures is made internally of the single block 1, which recess can house a motor for the impeller 2, thus reducing ventilator vibrations and noise levels even further.
  • the cover 4 exhibits a mouth 11, coaxial to the impeller 2, for the inlet of air into the ventilator 10.
  • 12 denotes an outlet mouth of the ventilator 10.
  • the breadth of the single block 1, measured in the various radial directions with respect to the impeller 2 starting from the outline of the volute 3 and going externalwise, is of the same order as the diameter of the impeller 2. This characteristic improves sound absorption during ventilator 10 functioning.
  • one or more impressions 5 are made, variously-shaped and of various dimensions and depths; also present are one or more through-holes 6, also of various shapes and dimensions.
  • the single block 1 can be manufactured in known ways and with relatively contained costs, by pressing or by moulding molten plastic material.
  • the above-indicated cavities are indicated by 5 and 6 and can be made directly during the single block 1 hot-pressing process, for example by inserting cores into the die, or after manufacture by removing material, for example after the installation of the ventilator 10 once excessive noise levels and vibrations are noted.
  • the single block 1 can also be provided with projections, recesses, grips, feet and the like, all directed at simplifying, for example, the setting up of the ventilator, its mounting on an external frame, the application on the single block 1 of the cover 4 to close the volute 3, and so on. It is further possible to provide holes 13 in the single block 1 around the outlet mouth 12, to allow fixture thereto of a connection flange to an external outlet. Thanks to the considerable breadth of the single block 1, it is possible to create chambers therein which can be used, for example, for storing tools and other objects.

Landscapes

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

Claims (5)

  1. Kreisellüfter, enthaltend ein Flügelrad (2), welches sich im Inneren einer Schnecke (3) dreht, wobei die genannte Schnecke (3) als ein Formeindruck in einem einzigen Block (1) aus Kunststoffmaterial hergestellt ist, dessen äusseres Profil ein anderes ist als die Form der genannten Schnecke (3); einen Deckel (4), vorgesehen zum Verschliessen der genannten Schnecke (3); dadurch gekennzeichnet, dass in einem Teil des genannten einzigen Blockes (1), der nicht von der genannten Schnecke (3) berührt ist, eine oder mehrere durchgehende Bohrungen (6) aufgewiesen sind.
  2. Kreisellüfter nach Patentanspruch 1, dadurch gekennzeichnet, dass die Stärke des genannten einzigen Blockes (1), gemessen in verschiedenen radialen Richtungen im Verhältnis zu dem genannten Flügelrad (2), ausgehend von der Form der genannten Schnecke (3) und sich in Richtung des Aussenbereiches bewegend, von der gleichen Grössenordnung ist wie der Durchmesser des genannten Flügelrades (2).
  3. Kreisellüfter nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass in einem Teil des genannten einzigen Blockes (1), der nicht von der genannten Schnecke (3) berührt ist, ein oder mehrere Formeindrücke vorgesehen sind.
  4. Kreisellüfter nach einem beliebigen der vorstehenden Patentansprüche, dadurch gekennzeichnet, dass der genannte einzige Block (1) eine parallelflache Form hat.
  5. Kreisellüfter nach einem beliebigen der vorstehenden Patentansprüche, dadurch gekennzeichnet, dass der genannte einzige Block (1) aus Polyurethan hergestellt ist.
EP96107007A 1996-05-03 1996-05-03 Kreisellüfter Expired - Lifetime EP0805277B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP96107007A EP0805277B1 (de) 1996-05-03 1996-05-03 Kreisellüfter
DE69617205T DE69617205T2 (de) 1996-05-03 1996-05-03 Kreisellüfter
AT96107007T ATE209303T1 (de) 1996-05-03 1996-05-03 Kreisellüfter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96107007A EP0805277B1 (de) 1996-05-03 1996-05-03 Kreisellüfter

Publications (2)

Publication Number Publication Date
EP0805277A1 EP0805277A1 (de) 1997-11-05
EP0805277B1 true EP0805277B1 (de) 2001-11-21

Family

ID=8222745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107007A Expired - Lifetime EP0805277B1 (de) 1996-05-03 1996-05-03 Kreisellüfter

Country Status (3)

Country Link
EP (1) EP0805277B1 (de)
AT (1) ATE209303T1 (de)
DE (1) DE69617205T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106621578B (zh) * 2016-12-21 2019-05-14 中国燃气涡轮研究院 一种轴向进气离心通风器
CN110469543A (zh) * 2019-09-12 2019-11-19 中国船舶重工集团公司第七0四研究所 离心通风机柱式蜗舌

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1403496A1 (de) * 1961-07-01 1969-01-30 Daimler Benz Ag Kuehl- oder Heissluftgeblaese
GB1107726A (en) * 1964-07-07 1968-03-27 Sound Attenuators Ltd Improved centrifugal fan or blower and a ventilator embodying the same
DE7616393U1 (de) * 1976-05-21 1976-10-28 Bernstein, Hans Friedrich, 8000 Muenchen Radialgebläse
FR2406107A1 (fr) * 1977-10-11 1979-05-11 Vierling Charles Forme en matiere synthetique alveolee pour caisson de ventilation
FR2469770A1 (fr) * 1979-11-13 1981-05-22 Tuzelestechnikai Kutatointezet Dispositif a niveau de bruit reduit, notamment ventilateur
DE3151386A1 (de) * 1981-12-24 1983-07-14 FSL Fenster-System-Lüftung GmbH, 6800 Mannheim Geblaese, insbesondere einbaugeblaese

Also Published As

Publication number Publication date
EP0805277A1 (de) 1997-11-05
DE69617205T2 (de) 2002-08-22
DE69617205D1 (de) 2002-01-03
ATE209303T1 (de) 2001-12-15

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