EP2104787A1 - 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

Info

Publication number
EP2104787A1
EP2104787A1 EP07819773A EP07819773A EP2104787A1 EP 2104787 A1 EP2104787 A1 EP 2104787A1 EP 07819773 A EP07819773 A EP 07819773A EP 07819773 A EP07819773 A EP 07819773A EP 2104787 A1 EP2104787 A1 EP 2104787A1
Authority
EP
European Patent Office
Prior art keywords
impeller
radial fan
region
outlet
peripheral wall
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.)
Granted
Application number
EP07819773A
Other languages
German (de)
English (en)
Other versions
EP2104787B1 (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

Links

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.
  • a high-pressure cleaning device known from EP 0248282 B1 has such a pump-blower unit with a drive shaft.
  • a very large volume radial fan can be used or the speed must be increased significantly or you must use a correspondingly smaller burner, which requires less combustion air.
  • Pump-blower units with a drive shaft are also known from DE 3001571 A1 and DE 3115698 C1.
  • 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 space is guided and improved in the manner of a flow guide element by the S-shaped peripheral wall area, 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 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.
  • 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.
  • To improve the desired properties also contributes between the impeller or its blade ring and the two side walls formed labyrinth sealing system.
  • 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 blower 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 runs.
  • FIG. 1 shows a side view of the radial fan as an exemplary embodiment of the invention, in which the side wall provided with the dividing wall is removed, but the dividing wall is shown, FIG.
  • FIG. 2 shows a side view, partially in section, of a high-pressure cleaning device in which a heating boiler is cut in section and the one connected to the boiler is shown. connected radial fan is shown in Figure 1, and
  • Figure 3 is a plan view of the high pressure cleaning device with schematically illustrated drive motor and schematically illustrated high pressure pump.
  • a cup-shaped impeller 10 is rotatably mounted in a helical housing 11.
  • the impeller 10 consists of a circular disk-like bottom 12, which has a center hub 13 for connection to the drive shaft 16 of a drive motor 17 shown only in Figure 3.
  • 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-circle-like curved first peripheral wall region 19 extends directly with a very small gap along the blade ring 15, in the exemplary embodiment over an angle of approximately 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 region 20 adjoins, which extends in a spiral manner with increasing radial distance from the impeller 10 as far as an outlet region 21 which forms the fan outlet.
  • the second peripheral wall portion 20 has a logarithmic spiral shape.
  • a third peripheral wall region 22 adjoins the first peripheral wall region 19, which also extends to the outlet region 21.
  • This third peripheral wall region 22 is curved in an S shape as far as an initially formed recess 23, this recess 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 the outlet flow direction in the manner of a diffuser extended in its width or its lo 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 it is integrally formed with respect to the peripheral 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.
  • 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.
  • 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 connected to each other 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 described in more detail in EP 1022469 Bl or in EP 1022470 Bl.
  • a partition 28 extends into the interior of the cup-shaped impeller 10 and divides its interior into a first suction space V 1 and a second suction space V 2 facing the peripheral wall area 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 Vl.
  • 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 principal mode of action is described in detail in the cited prior art according to EP 1022469 Bl or EP 1022470 Bl, so that it will be simplified and shortened in the following. These are specifically combined functions of the radial and cross-flow fan technology as well as the side channel compressor technology, whereby this fan technology is referred to as HG technology. Depending on the design and execution, one or the other technique dominates.
  • the impeller 10 When the impeller 10 rotates in the direction of rotation A, the impeller 10 acts as a radial fan in the region of the first suction chamber V1. Outside air is sucked through the air intake opening 28 into the first suction chamber Vl and accelerated radially outward over the peripheral region of the first suction chamber Vl by the blade ring 15. This accelerated air flow is divided outside into a working flow Al and a working flow A2. The working flow Al passes back into the first suction chamber Vl and is again accelerated outwards by the radial fan action, wherein 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 dividing wall 28 forms a tight seal, and at the first circumferential wall region 19 lying opposite the dividing wall, 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 thereby 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 fan with a first stage formed by the first suction chamber Vl, working as a radial fan and a second stage formed by the second suction chamber V2, working as a cross-flow fan.
  • outlet region 21 as a blow-out diffuser inaccording to the expansion described in the width or in the cross-section causes an increase in the static blower pressure.
  • the high-pressure cleaning device shown in FIGS. 2 and 3 has a structure similar to that of the high-pressure cleaning device known from EP 0 248 282 11 Bl.
  • 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, also in connection with the invention
  • a pump-blower unit 30 On a chassis 40, which may be designed as a wheeled mobile chassis, a pump-blower unit 30 is mounted, which consists of the drive motor 17,
  • the radial fan 9 or its outlet area 21 is connected to a cylindrical heating boiler 32, the lid 33 of which is a
  • blower burner 34 carries 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 heating 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.
  • the side of the radial fan 9 is still a fuel pump 38 is connected to the fuel supply to the blower burner 34 to 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 drive motor 17 is usually a 4-pole asynchronous motor is used, which causes a speed of less than 1,500 U / min in a 50 Hz alternating current. in principle Also 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.

Landscapes

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

Abstract

L'invention concerne une soufflante radiale avec une roue mobile (10) en forme de pot et avec un carter (11) recevant la roue mobile (10). La paroi périphérique (18) de ce carter présente, en partant d'une première région de paroi circonférentielle (19) incurvée en forme de cercle partiel et s'étendant directement le long de la roue mobile (10) : d'une part, dans la direction de rotation de la roue mobile (10), une deuxième région de paroi circonférentielle (20) dont la distance radiale par rapport à la roue mobile (10) augmente sans cesse en spirale jusqu'à une région de sortie (21) ; et d'autre part, à l'encontre de la direction de rotation de la roue mobile (10), une troisième région de paroi circonférentielle (22) s'étendant également jusqu'à la région de sortie (21). Deux parois latérales (25, 26) recouvrent les côtés frontaux axiaux de la roue mobile ; une cloison séparatrice (28), disposée sur une des parois latérales, s'engage dans la roue mobile (10) en forme de pot et divise l'espace intérieur de celle-ci en une première chambre d'aspiration (V1) et une deuxième chambre d'aspiration (V2), une ouverture d'aspiration (29) étant associée à la première chambre d'aspiration (V1). La troisième région de paroi circonférentielle (22) est, en partant de la première région de paroi circonférentielle (19), incurvée en S jusqu'à la région de sortie (21), sachant que sa région partielle (24) incurvée dans le même sens que la première région de paroi circonférentielle (19) forme un élément de guidage de flux pour un flux d'air ramené vers la deuxième chambre d'aspiration (V2). La section de la région de sortie (21) s'élargit à la manière d'un diffuseur dans la direction du flux sortant. Cette configuration permet d'obtenir une soufflante radiale de rendement accru et de puissance de soufflante accrue, pour un volume réduit.
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 true EP2104787A1 (fr) 2009-09-30
EP2104787B1 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)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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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Also Published As

Publication number Publication date
DE102006061756A1 (de) 2008-07-03
US8813689B2 (en) 2014-08-26
CN101652572B (zh) 2013-08-21
CN101652572A (zh) 2010-02-17
DK2104787T3 (en) 2016-08-22
US20110044808A1 (en) 2011-02-24
EP2104787B1 (fr) 2016-05-04
WO2008083787A1 (fr) 2008-07-17

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