EP2677175A1 - Ventilateur radial en plusieurs étages - Google Patents

Ventilateur radial en plusieurs étages Download PDF

Info

Publication number
EP2677175A1
EP2677175A1 EP12172538.6A EP12172538A EP2677175A1 EP 2677175 A1 EP2677175 A1 EP 2677175A1 EP 12172538 A EP12172538 A EP 12172538A EP 2677175 A1 EP2677175 A1 EP 2677175A1
Authority
EP
European Patent Office
Prior art keywords
impeller
return
chamber
radial fan
impeller chamber
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Withdrawn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
EP12172538.6A
Other languages
German (de)
English (en)
Inventor
Lothar Reckert
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP12172538.6A priority Critical patent/EP2677175A1/fr
Publication of EP2677175A1 publication Critical patent/EP2677175A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • F04D29/30—Vanes
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/70—Shape

Definitions

  • the present invention relates to a multi-stage radial fan, in particular a multi-stage miniature radial fan.
  • centrifugal blowers are known from the prior art. Such or its components are used for example in the EP 1 013 938 B1 disclosed. From the basic structure similar concepts are known in the art as centrifugal pumps, such as from the DE 100 33 402 A1 , However, such centrifugal pumps are not radial fans, as they are not designed to convey gases, but liquids. This requires different designs, designs and designs. It is also known from the prior art to design centrifugal pumps in several stages. It is also known to provide return blades for charging the second and following stages. These are in centrifugal pumps in the prior art, such as in the DE 100 33 402 A1 mostly open. These recirculation loads are designed to utilize the swirl of the fluid to charge the subsequent stages more effectively.
  • Object of the present invention is to provide a radial fan as shown in EP 1 013 938 B1 known to develop so forth that higher pressure differences can be achieved with high efficiency.
  • the inventor has initially made efforts to increase the speed of the fan accordingly. This did not lead to the desired result.
  • the object is achieved according to claim 1 by a scaffold designedbeschaufelung, which is at least partially closed and has return vanes, which are identical to the impeller blades of the impeller of the respective impeller chamber formed.
  • the dependent claims 2 to 10 indicate advantageous developments.
  • the radial fan has at least two impeller chambers which are circular in cross-section and flow-connected one after the other as well as geometrically concentrically arranged.
  • Each impeller chamber of the at least two impeller chambers has an impeller.
  • This has a circular lid and a circular bottom, which are arranged concentrically to one another and to the impeller chamber. In the bottom of an air inlet opening is arranged centrally.
  • the impeller on a plurality of part spiral impeller blades as for example from EP 1 013 938 B1 is known. Thus, it is an at least partially closed impeller.
  • the impeller blades extend between the lid and bottom of the air inlet opening radially outward.
  • At least one impeller chamber which is connected downstream of at least one further impeller chamber in terms of flow, has a return blading connected in a rotationally fixed manner to the impeller chamber.
  • the return blading is at least partially closed according to the invention and has return blades, which are formed identically to the impeller blades of the impeller of the impeller chamber.
  • the efficiency can be significantly increased, in particular when using the radial fan to achieve high pressure differences.
  • Such return blading differs from known centrifugal pumps by the formation of the return blading according to the impeller blades. As a result, optimal utilization of the twist and a particularly efficient charging or deflection into the subsequent stage can be achieved.
  • the scaffold for this purpose, advantageously on a centric air outlet, which is fluidly connected to the air inlet of the impeller of the fluidically downstream impeller chamber.
  • a centric air outlet which is fluidly connected to the air inlet of the impeller of the fluidically downstream impeller chamber.
  • the radial fan is a miniature radial fan.
  • the diameter of the wheels impeller chambers, and / or may be prepared by a process of preparing for the following reasons: a) of the following reasons: a) of the following reasons: a) of the following reasons: a) of the following reasons: a) of the following reasons: a) of the following reasons: a) of the following reasons: a) of the following reasons: a) of the following reasons: a) of the following reasons: a) 3 to 10 cm, in particular 4 to 8 cm, in particular 5 to 7 cm.
  • the radial fan according to claim 3 in particular characterized in that the return vanes are formed in their number, shape, longitudinal sectional shape and / or relative arrangement to each other and / or in cross section of the impeller identical to the impeller blades of the impeller of the impeller chamber.
  • Particularly preferred is a conformity with the impeller blades in terms of the number, the longitudinal sectional shape and the relative arrangement to one another and the arrangement in the cross section of the impeller chamber.
  • the coincidence in the height of the return vanes with that of the impeller blades is of minor importance and, in particular, depending on the purpose, deliberately deviating from the height of the impeller blades are selected to effect a corresponding pressure adjustment.
  • the return blading according to claim 4 viewed from the radially inner to the radially outer initially a closed and then open to the impeller of the same impeller chamber area.
  • the impeller chamber is designed so that it has in the longitudinal step parallel to the axis of the concentric arrangement at the ends of a semicircular termination on the side facing away from the wheel, the impeller facing away from the remindzhoubeschaufelung starts and facing away from the scaffold manufacturedbeschaufelung on the impeller facing area End of the impeller is arranged.
  • a shape may be selected with up and down quarter-circle terminations with a straight line portion therebetween.
  • the impeller is advantageously arranged with respect to the semicircular end or the quarter-circle end in such a way that the end of the impeller blades facing away from the return blading ends with the semicircular or quarter-circle rounding.
  • the return blading is closed according to claim 5 in the area facing away from the impeller of the same impeller chamber to the impeller of the same impeller chamber area. This also supports the most efficient possible continuation of the gas quantities in the subsequent stages.
  • the impeller in the chamber with scaffold with scaffold with scaffold.
  • the impeller in the chamber with scaffold with scaffold.
  • all impellers and / or bunkfashionfelonne the radial fan are identical.
  • the return vanes taking into account the features of the respective preceding claims, are designed such that the cross sections between the return vanes used to guide the gas masses initially increase from radially inner to radially outer and then remain constant or smaller, wherein the rising portion advantageously has two-thirds of the radial extent of the return vanes and the change in the cross-sections is effected by longitudinally sectioned by the vanes over the radius of different thickness return vanes.
  • the return vanes are designed so that their return vane outlet angle 55 ° to 80 ° and their return vane inlet angle 15 ° to 35 °.
  • the return bucket exit angle is the angle of the tangent to a return bucket in the radially innermost.
  • the return bucket exit angle is the angle of the tangent at the radially outermost point of the return bucket. In this case, the angle is measured in each case against the tangent of a virtual circle at this point about the axis of concentricity of the impeller chamber.
  • FIG. 1 Figure 11 shows a plan view of a return blading 9. Recognizable are return blades 7 disposed between a return blading tray 10 and a return blading lid 11. It will be appreciated that the return blading 9 is closed in the area of the return blading tray 10 and in the area where the return blading tray 10 is not disposed is open on one side. Evident are also the part-spiral ends of the return blades 7, which are beyond the sudclobeschaufelungsboden 10 addition.
  • Fig. 2 shows a cross section through a return blading.
  • Recirculating buckets 7 can be seen in longitudinal section 20. They are formed in part spiral shape on a scaffold manufactured by a scaffolding. This has an air outlet 21. This is arranged centrally.
  • Fig. 3 shows a longitudinal section through a radial fan.
  • a first impeller 1 is arranged in the first impeller chamber 6 .
  • a second impeller 13 In the second impeller chamber 12 is a second impeller 13.
  • the impellers have between the impeller bottom 4 and impeller cover 5 impeller blades 3.
  • the impeller floors 4 have air inlet openings 2.
  • the impeller chambers 6, 12 are formed by a surrounding plastic housing.
  • a return blading 9 is arranged in addition to the first impeller 1. This is partially open and partially closed.
  • the first impeller chamber 6 has at the outer ends in this longitudinal section an air space, which is formed from two quarter-circular sections with a rectangular, straight section arranged therebetween.
  • an air space which is formed from two quarter-circular sections with a rectangular, straight section arranged therebetween.
  • the return blading 9 includes a deflection 8 and an air outlet 21.
  • This air outlet 21 is fluidically coupled directly to the air inlet 2 of the second impeller 13.
  • the impeller blades 3 of the first impeller 1 have in their longitudinal sectional shape, arrangement and number identity with the return blades 7 of the return blading 9 of the first impeller chamber 6.
  • the wheels 1 and 13 are connected via the drive shaft 15 directly to the drive 16 and thereby can be compared to the impeller chambers 6, 12 and the scaffolding 9, which is rotatably connected to the housing, brought into rotation.
  • Fig. 4 shows a cross section through a rinse tank, as well as in Fig. 2 shown.
  • the return vane entry angles 18 and the return vane exit angles 17 are indicated.
  • cross sections 19 are marked, which initially increase from the radial interior to the radial outward and then fall off again.
  • the radial inner part of the drawn cross-sections 19 is 3.2 mm on average, the following 3.5 mm of the following radially outwardly adjoining 3, 4.5 mm and the radially outermost drawn 3.2 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP12172538.6A 2012-06-19 2012-06-19 Ventilateur radial en plusieurs étages Withdrawn EP2677175A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12172538.6A EP2677175A1 (fr) 2012-06-19 2012-06-19 Ventilateur radial en plusieurs étages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12172538.6A EP2677175A1 (fr) 2012-06-19 2012-06-19 Ventilateur radial en plusieurs étages

Publications (1)

Publication Number Publication Date
EP2677175A1 true EP2677175A1 (fr) 2013-12-25

Family

ID=46384175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12172538.6A Withdrawn EP2677175A1 (fr) 2012-06-19 2012-06-19 Ventilateur radial en plusieurs étages

Country Status (1)

Country Link
EP (1) EP2677175A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114688046A (zh) * 2020-12-25 2022-07-01 广东美的白色家电技术创新中心有限公司 风机组件和吸尘器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822123A (en) * 1955-05-16 1958-02-04 American Machine & Metals Electric motor fan unit for hazardous locations
US3245610A (en) * 1964-01-02 1966-04-12 Ametek Inc Motor-fan unit for vacuum cleaners
DE2024023A1 (de) * 1969-05-19 1970-11-26 Air Control Installations Ltd., Chard, Somerset (Großbritannien) Mehrstufiges Gebläse
JPS63100298A (ja) * 1986-10-16 1988-05-02 Matsushita Electric Ind Co Ltd 多段遠心フアン
EP1013938B1 (fr) 1998-12-18 2001-08-01 Lothar Reckert Rotor de soufflante à vitesse spécifique réduite
DE10033402A1 (de) 2000-07-08 2002-01-24 Hilge Philipp Gmbh Kreiselpumpe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822123A (en) * 1955-05-16 1958-02-04 American Machine & Metals Electric motor fan unit for hazardous locations
US3245610A (en) * 1964-01-02 1966-04-12 Ametek Inc Motor-fan unit for vacuum cleaners
DE2024023A1 (de) * 1969-05-19 1970-11-26 Air Control Installations Ltd., Chard, Somerset (Großbritannien) Mehrstufiges Gebläse
JPS63100298A (ja) * 1986-10-16 1988-05-02 Matsushita Electric Ind Co Ltd 多段遠心フアン
EP1013938B1 (fr) 1998-12-18 2001-08-01 Lothar Reckert Rotor de soufflante à vitesse spécifique réduite
DE10033402A1 (de) 2000-07-08 2002-01-24 Hilge Philipp Gmbh Kreiselpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114688046A (zh) * 2020-12-25 2022-07-01 广东美的白色家电技术创新中心有限公司 风机组件和吸尘器

Similar Documents

Publication Publication Date Title
EP2696029B1 (fr) Grille d'aube avec définition de contour de la paroi latérale et turbomachine
EP2025945B1 (fr) Machine de traitement des écoulements dotée d'un creux de paroi de canal de ceinture
DE112015001237B4 (de) Abgasturbolader
DE102011013076A1 (de) Strahltriebwerksvorrichtung mit einem Nebenstromkanal
DE102009019061A1 (de) Mehrstufiger Radialverdichter
EP2802780A1 (fr) Ventilateur axial ou diagonal avec bord de décrochage sur l'extrados des pales de rotor
WO2019063384A1 (fr) Diffuseur pour compresseur
EP1632662A2 (fr) Turbomachine avec soutirage
DE1817430A1 (de) Regenerativkompressor
DE102013114609A1 (de) Radial-Laufrad für einen Trommellüfter und Lüftereinheit mit einem derartigen Radial-Laufrad
DE102010046331A1 (de) Gekühlte Turbinenschaufeln für ein Gasturbinentriebwerk
EP3404269B1 (fr) Dispositif formant ventilateur pourvu de buse de division d'écoulement
EP3256732B1 (fr) Roue pour un ventilateur et ventilateur
WO2020099034A1 (fr) Ventilateur diagonal compact équipé d'un dispositif directeur de sortie
DE112012002199T5 (de) Strömungsmaschine der regenerativen Art mit einer Leitschaufel an einer Kana!wand
DE102018211809A1 (de) Gehäuse für einen Ventilator und Ventilator
EP3527832B1 (fr) Boîtier en spirale d'un ventilateur radial
EP3158204A1 (fr) Rotor de compresseur radial et compresseur radial associé
EP2677175A1 (fr) Ventilateur radial en plusieurs étages
EP3032107A2 (fr) Pompe turbomoleculaire
DE202018106503U1 (de) Diagonalventilator mit Nachleiteinrichtung
DE102014226341A1 (de) Verdichter, Abgasturbolader und Brennkraftmaschine
DE102017114007A1 (de) Diffusor für einen Radialverdichter
DE102011013677B4 (de) Lüfterrad
DE202015100654U1 (de) Ventilatorrad und Ventilator

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20140624

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20160621

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20160726