EP2104787B1 - Soufflante radiale et nettoyeur à haute pression pourvu d'une soufflante radiale - Google Patents

Soufflante radiale et nettoyeur à haute pression pourvu d'une soufflante radiale Download PDF

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Publication number
EP2104787B1
EP2104787B1 EP07819773.8A EP07819773A EP2104787B1 EP 2104787 B1 EP2104787 B1 EP 2104787B1 EP 07819773 A EP07819773 A EP 07819773A EP 2104787 B1 EP2104787 B1 EP 2104787B1
Authority
EP
European Patent Office
Prior art keywords
impeller
radial fan
peripheral wall
outlet area
wall section
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.)
Not-in-force
Application number
EP07819773.8A
Other languages
German (de)
English (en)
Other versions
EP2104787A1 (fr
Inventor
Ernst Claussen
Joachim Peetz
Gerd Wegner
Ralph Seitter
Lutz Bauer
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.)
Punker GmbH
Alfred Kaercher SE and Co KG
Original Assignee
Punker GmbH
Alfred Kaercher SE and Co KG
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 Punker GmbH, Alfred Kaercher SE and Co KG filed Critical Punker GmbH
Publication of EP2104787A1 publication Critical patent/EP2104787A1/fr
Application granted granted Critical
Publication of EP2104787B1 publication Critical patent/EP2104787B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • 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
    • F04D29/40—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
    • 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
    • F04D29/422—Discharge tongues

Definitions

  • the invention relates to a radial fan, which is designed as a so-called HG blower, with the features of the preamble of claim 1.
  • EP 1 002 958 A1 is a radial fan with a pot-like impeller provided with a blade ring at its circumference, and a housing receiving the impeller, which extends radially from an arcuately curved, directly along the blade ring extending peripheral wall area helically in the direction of rotation of the impeller to an outlet, known.
  • Axial end faces of the impeller are covered by side walls, wherein a partition wall, which engages in the cup-shaped impeller, is arranged on one of the side walls and divides its interior into a first and a second suction space.
  • Pump-blower units with a drive shaft are also made of DE 3001571 A1 and the DE 3115698 C1 known.
  • An object of the invention is to improve a radial fan in HG-technology with regard to the volume flow and pressure generated, in particular for use in a high-pressure cleaner, so that a smaller-volume design is achieved and / or operation at a lower speed is made possible.
  • the advantage of the radial blower according to the invention is, in particular, that the return flow to the second suction chamber is guided and improved in the manner of a flow guide element by the S-shaped peripheral wall region, which leads to an overall increase in the power of the blower.
  • a diffuser in cross-section widening outlet area which also contributes to increase the fan performance.
  • this outlet is integrated in or on the radial fan.
  • the improved achieved performance data make the radial fan particularly suitable for high-pressure cleaning devices, where it comes down to small-volume design at relatively low speed. The low speed is not only required by the common operation with a high-pressure pump, but it also contributes to a reduction in the noise emission. At the same time increases the life of the radial fan and possibly one arranged on a same drive shaft high-pressure pump.
  • the end regions of the second and the third peripheral wall regions remote from the impeller form opposite wall regions of the outlet region, so that the latter is completely integrated and seamlessly formed. This also leads to an improvement in the flow conditions.
  • the outlet region has at its housing-side beginning its smallest width, which is preferably less than half the diameter of the impeller. This dimensioning has proven to be particularly suitable for achieving a high pressure and a high volume flow. This is expediently achieved in that the third peripheral wall region on the housing-side beginning of the outlet region has a tongue-like design into the housing interior, so that this narrowing is achieved at the beginning of the outlet region by the peripheral wall regions and no additional elements are required.
  • the housing is preferably made of plastic to achieve a simple and cost-effective production, in principle, a metal version is possible.
  • the second peripheral wall region has a logarithmic spiral shape, which has proved to be particularly advantageous with regard to the desired objectives.
  • the radial fan according to the invention is particularly suitable for use in a high-pressure cleaning device in which the impeller of the radial fan and a high-pressure pump are fixed to the same drive shaft of a drive motor and form a pump-fan unit in view of the described properties and advantages.
  • Preferred is the arrangement of the radial fan on one side and that of the high-pressure pump on the other side of the drive motor.
  • the pump-blower unit is arranged on a particular mobile chassis together with a boiler, wherein the radial fan for supplying the combustion air for a burner is connected to the boiler and a liquid line from the high pressure pump for heating the liquid in the Boiler is running.
  • a cup-shaped impeller 10 rotatably mounted in a helical housing 11.
  • the impeller 10 consists of a circular disk-like bottom 12, the center of a hub 13 for connection to the drive shaft 16 of a only in FIG. 3 has shown drive motor 17.
  • At the radially outer peripheral region of the bottom 12 rises perpendicular to its plane a plurality of blades 14 which form a blade ring 15.
  • the housing 11 consists of a helically shaped peripheral wall 18, wherein a part-circular curved first peripheral wall portion 19 extends directly with a very small gap along the blade ring 15, in the embodiment over an angle of about 120 °. However, this angle may vary, wherein between the blade ring 15 and the first peripheral wall portion 19, a seal may be provided in the manner of a labyrinth seal.
  • a second circumferential wall area 20 connects, which extends in a spiral manner with increasing radial distance from the impeller 10 as far as an outlet area 21 which forms the fan outlet.
  • the second peripheral wall portion 20 has a logarithmic spiral shape.
  • a third circumferential wall region 22 which likewise extends as far as the outlet region 21.
  • This third peripheral wall region 22 is curved in an S shape as far as a tongue-like indentation 23, this indentation 23 forming the beginning of the outlet region 21, which has its smallest width at this beginning with respect to the outlet flow direction, and then in width in the outlet flow direction in the manner of a diffuser or expanded its cross section.
  • the two end regions of the second peripheral wall region 20 and of the third peripheral wall region 22 remote from the first peripheral wall region 19 form opposite walls of the outlet region 21, so that this is integrally formed with respect to the circumferential wall 18. He may also be recognized in an alternative embodiment.
  • the S-shaped curvature of the third outlet wall region 22, starting from the first peripheral wall region 19, has first an opposing curvature and then again an equidirectional curvature.
  • the same direction of curvature region 24 (with respect to the first peripheral wall portion 19) forms a flow guide for the return to the impeller 10 partial flow.
  • the indentation 23 promotes the division of the flow into this recirculated partial flow and the partial flow reaching the outlet region 21.
  • the peripheral wall 18 forms together with two the open sides of the peripheral wall 18 covering side walls 25, 26, the housing 11. According to FIG. 3 These side walls 25, 26 are each integrally connected to an axial portion of the peripheral wall 18, so that a two-part housing 11 is formed. The two parts are at a connecting line 27 screwed together or fixed together in some other way.
  • peripheral wall 18 may be integrally formed integrally on one of the two side walls 25, 26, or there is a three-piece housing, consisting of peripheral wall 18 and the two side walls 25, 26th
  • the impeller 10 is sealed to the two side walls 25, 26 towards labyrinth seal, as shown in the EP 1022469 B1 or in the EP 1022470 B1 is described in more detail.
  • a partition wall 28 extends into the interior of the cup-shaped impeller 10 and divides the interior thereof into a first suction chamber V1 and a second suction chamber V2, which faces the peripheral wall region 19.
  • This partition wall 28 extends from the side wall 26 obliquely out to the bottom 12 of the impeller 10, wherein in principle a parallel course to the axis of rotation of the impeller 10 is possible.
  • this edge may be provided with sealing elements, as described in more detail in the cited prior art.
  • the side wall 26 is provided with an air intake opening 29, which opens in the first suction chamber V1.
  • the air intake 29 may be in various shapes and configurations. Various variants and embodiments are described in detail in the prior art mentioned above and can be used accordingly in the present invention.
  • the impeller 10 acts in the region of the first suction chamber V1 as a radial fan. Outside air is sucked through the air intake opening 28 into the first suction chamber V1 and accelerated radially outward over the peripheral region of the first suction chamber V1 through the blade ring 15. This accelerated air flow is divided outside into a working flow A1 and a working flow A2. The working flow A1 returns to the first suction chamber V1 and is accelerated outwards again by the radial fan action, whereby a substantial part of this working flow reaches the spiral extension area at the opposite end of the first suction chamber V1.
  • the impeller In the region of the second suction chamber V2, the impeller is not closed at its two axial end faces by the side walls 25, 26. Towards the interior, the partition wall 28 forms a tight seal, and at the partition wall opposite the first peripheral wall portion 19, this forms the seal.
  • the impeller 10 therefore operates in the region of the second suction chamber V2 exclusively as a cross-flow fan, which sucks the working stream A2 and is supported by the S-shaped curvature of the third peripheral wall portion 22 and the indentation 23. This working stream A2 is then compressed and blown out again on the opposite side of the impeller 10.
  • the fan works thus partly as a two-stage blower with a first stage formed by the first suction chamber V1, working as a radial fan and a second stage formed by the second suction chamber V2, acting as a cross-flow fan.
  • outlet portion 21 as a discharge diffuser due to the described enlargement in width or in cross-section causes an increase in the static fan pressure.
  • high pressure cleaning device has a similar structure as that of the EP 0248282 B1 known high pressure cleaning device.
  • the drive motor has a vertical drive shaft, while the drive shaft 16 of the drive motor 17 is arranged horizontally according to Figures 2 and 3. It is of course possible to form the high-pressure cleaning device described in connection with the invention with a vertical drive shaft 16.
  • a pump-blower unit 30 On a chassis 40, which may be formed as a wheeled mobile chassis, a pump-blower unit 30 is mounted, which consists of the drive motor 17, the drive shaft 16 on one side of the impeller 10 of the radial fan 9 and on the opposite Side a high-pressure pump 31 drives.
  • the radial fan 9 or its outlet region 21 is connected to a cylindrical heating boiler 32, the cover 33 of which carries a fan burner 34 which is equipped with gas or liquid fuel is operated.
  • the high-pressure pump 31 is connected via a connecting line 35 to a pipe system 36 in the interior of the boiler 32, wherein the pipe system 36 extends in a plurality of turns along the cylindrical outer wall 37 of the boiler 32. These turns are formed in two layers in the illustrated embodiment, of course, a different number of layers is possible.
  • the air flow generated by the radial fan 9 flows upward in the boiler 32 along the outer wall 37 and supplies the required combustion air to the fan burner 34.
  • the burner flame extends vertically downward from the blower burner 34 and heats the pipe system 36 or the liquid therein.
  • the heated liquid is then passed in a continuous process through the high-pressure pump 31 to an outlet pump nozzle, not shown, which is usually mounted on a high-pressure hose.
  • a fuel pump 38 is still connected to the fuel supply to the fan burner 34 on the drive shaft 16 and the hub 13 of the impeller 10 and is driven simultaneously.
  • a regulating element 39 is arranged, by means of which the air flow generated can be regulated as required.
  • a 4-pole asynchronous motor is usually used, which causes a speed of less than 1,500 U / min in a 50 Hz alternating current.
  • electronically controlled motors can be used, which allow a greater variability of the speed.
  • the housing 11 of the radial fan 9 is suitably made of plastic, on the one hand to achieve a cost-effective production and on the other hand a low weight. In principle, however, a metal version is possible.

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

Claims (9)

  1. Soufflante radiale avec un rotor (10) de type pot, qui est pourvue sur sa périphérie d'une couronne d'aubes (15), avec un boîtier (11) recevant le rotor (10), dont la paroi périphérique (18) présente à partir d'une première zone de paroi périphérique (19) s'étendant directement le long de la couronne d'aubes (15), courbée en cercle partiel d'une part dans le sens de rotation du rotor (10) une deuxième zone périphérique (20) avec une distance radiale devenant de plus en plus grande en spirale par rapport au rotor (10) jusqu'à une zone de sortie (21), et possède d'autre part contre le sens de rotation du rotor (10) une troisième zone de paroi périphérique (22) s'étendant aussi jusqu'à la zone de sortie (21), avec deux parois latérales (25, 26) recouvrant les côtés avant axiaux du rotor (10), une paroi de séparation (28) agencée sur l'une des parois latérales (26) s'engageant dans le rotor (10) de type pot et divisant son espace intérieur en un premier (V1) et un second espace d'aspiration (V2), et une ouverture d'aspiration (29) étant associée au premier espace d'aspiration (V1) et le second espace d'aspiration (V2) étant tourné vers la première zone de paroi périphérique (19) s'étendant directement le long de la couronne d'aubes (15), la troisième zone de paroi périphérique (22) étant courbée à partir de la première zone de paroi périphérique (19) en S jusqu'à la zone de sortie (21) et sa zone partielle (24) courbée dans le même sens que la première zone de paroi périphérique (19) formant un élément conducteur d'écoulement pour un courant d'air (A2) ramené vers le second espace d'aspiration (V2), et la zone de sortie (21) s'élargissant en section transversale dans le sens d'écoulement de sortie comme un diffuseur, caractérisée en ce que les zones d'extrémité éloignées du rotor (10) de la deuxième et troisième zones de paroi périphériques (20, 22) forment des zones de paroi en regard de la zone de sortie (21) de sorte que la zone de sortie soit complètement intégrée et formée sans transition.
  2. Soufflante radiale selon la revendication 1, caractérisée en ce que la zone de sortie (21) possède sur sa périphérie côté boîtier sa largeur la plus petite qui est de préférence plus petite que la moitié du diamètre du rotor (10).
  3. Soufflante radiale selon l'une quelconque des revendications précédentes, caractérisée en ce que la troisième zone de paroi périphérique (22) possède sur la périphérie côté boîtier de la zone de sortie (21) une forme (23) dirigée comme une languette à l'intérieur du boîtier.
  4. Soufflante radiale selon l'une quelconque des revendications précédentes, caractérisée en ce que le boîtier se compose de matière plastique ou de métal.
  5. Soufflante radiale selon l'une quelconque des revendications précédentes, caractérisée en ce que la deuxième zone de paroi périphérique (20) possède une forme spiralée logarithmique.
  6. Soufflante radiale selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un système étanche à labyrinthe est formé entre le rotor (10) ou sa couronne d'aubes (15) et les deux parois latérales (25, 26).
  7. Appareil de nettoyage haute pression avec une soufflante radiale (9) selon l'une quelconque des revendications précédentes, caractérisé en ce que le rotor (10) de la soufflante radiale (9) et une pompe haute pression (31) sont fixés sur le même arbre d'entraînement (16) d'un moteur d'entraînement (17) et forment une unité de soufflante et pompe (30).
  8. Appareil de nettoyage haute pression selon la revendication 7, caractérisé en ce que la soufflante radiale (9) est agencée sur l'un côté et la pompe haute pression (31) est agencée sur l'autre côté du moteur d'entraînement (17).
  9. Appareil de nettoyage haute pression selon la revendication 7 ou 8, caractérisé en ce que l'unité de soufflante et pompe (30) est agencée sur un châssis (40) en particulier mobile conjointement avec une chaudière (32), la soufflante radiale (9) étant reliée pour l'amenée de l'air de combustion pour un brûleur (34) à la chaudière (32) et une conduite de liquide (35, 36) s'étendant depuis la pompe haute pression (31) pour le chauffage du liquide dans la chaudière (32).
EP07819773.8A 2006-12-28 2007-11-13 Soufflante radiale et nettoyeur à haute pression pourvu d'une soufflante radiale Not-in-force EP2104787B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006061756A DE102006061756A1 (de) 2006-12-28 2006-12-28 Radialgebläse und mit einem Radialgebläse versehenes Hochdruck-Reinigungsgerät
PCT/EP2007/009787 WO2008083787A1 (fr) 2006-12-28 2007-11-13 Soufflante radiale et nettoyeur à haute pression pourvu d'une soufflante radiale

Publications (2)

Publication Number Publication Date
EP2104787A1 EP2104787A1 (fr) 2009-09-30
EP2104787B1 true EP2104787B1 (fr) 2016-05-04

Family

ID=39092012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07819773.8A Not-in-force EP2104787B1 (fr) 2006-12-28 2007-11-13 Soufflante radiale et nettoyeur à haute pression pourvu d'une soufflante radiale

Country Status (6)

Country Link
US (1) US8813689B2 (fr)
EP (1) EP2104787B1 (fr)
CN (1) CN101652572B (fr)
DE (1) DE102006061756A1 (fr)
DK (1) DK2104787T3 (fr)
WO (1) WO2008083787A1 (fr)

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Publication number Priority date Publication date Assignee Title
US20090318380A1 (en) 2007-11-20 2009-12-24 Pharmasset, Inc. 2',4'-substituted nucleosides as antiviral agents
DE202009014093U1 (de) * 2009-10-14 2010-12-23 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
JP5994827B2 (ja) * 2014-09-09 2016-09-21 株式会社ノーリツ 送風機および給湯装置
DE102016005552A1 (de) * 2016-05-09 2017-11-09 Stiebel Eltron Gmbh & Co. Kg Elektrischer Heizlüfter
CN107049136B (zh) * 2016-12-21 2022-05-20 青岛博一伟道电子技术有限公司 一种新型静音除尘喷雾装置
DE102017111910A1 (de) * 2017-05-31 2018-12-06 Alfred Kärcher SE & Co. KG Reinigungsgerät
CN111980967B (zh) * 2020-08-10 2021-10-15 佛山市威灵洗涤电机制造有限公司 风机和衣物处理装置
CN112901557B (zh) * 2020-12-30 2021-12-03 中南大学 一种半无叶区具有自适应曲率型面的扩压器

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EP1022470B1 (fr) 1999-01-20 2004-10-13 PUNKER GmbH & CO. Soufflante radial
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Also Published As

Publication number Publication date
WO2008083787A1 (fr) 2008-07-17
US8813689B2 (en) 2014-08-26
US20110044808A1 (en) 2011-02-24
CN101652572A (zh) 2010-02-17
DK2104787T3 (en) 2016-08-22
CN101652572B (zh) 2013-08-21
EP2104787A1 (fr) 2009-09-30
DE102006061756A1 (de) 2008-07-03

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