EP0879644B1 - Zerstäuber mit rotierender Düse - Google Patents

Zerstäuber mit rotierender Düse Download PDF

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Publication number
EP0879644B1
EP0879644B1 EP97202633A EP97202633A EP0879644B1 EP 0879644 B1 EP0879644 B1 EP 0879644B1 EP 97202633 A EP97202633 A EP 97202633A EP 97202633 A EP97202633 A EP 97202633A EP 0879644 B1 EP0879644 B1 EP 0879644B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
stator
rotor
chamber
rotary nozzle
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
EP97202633A
Other languages
English (en)
French (fr)
Other versions
EP0879644A3 (de
EP0879644A2 (de
Inventor
Giuseppe Arsi
Erminio Landini
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.)
Interpump Group SpA
Original Assignee
Interpump Group SpA
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 Interpump Group SpA filed Critical Interpump Group SpA
Publication of EP0879644A2 publication Critical patent/EP0879644A2/de
Publication of EP0879644A3 publication Critical patent/EP0879644A3/de
Application granted granted Critical
Publication of EP0879644B1 publication Critical patent/EP0879644B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
    • B05B3/0409—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements
    • B05B3/0463—Rotor nozzles, i.e. nozzles consisting of an element having an upstream part rotated by the liquid flow, and a downstream part connected to the apparatus by a universal joint

Definitions

  • This patent relates to pressurized water delivery lances of the rotary nozzle type, as usually used in hot or cold water jet washers.
  • Such a water delivery lance according to the preamble of claim 1 is s known from US 4 542 853.
  • Rotary nozzle delivery lances comprise a cylindrical chamber into which the water to be delivered is fed at high velocity in a direction at least partly tangential, ie having a tangential component, and which has an axial exit hole acting as the support seat for a nozzle.
  • the nozzle is in the form of a body with an at least partly conical wall arranged to rest against the inner surface of the cylindrical chamber, and at its top a spherical surface arranged to bear under hydraulic seal conditions against the axial exit hole of the chamber, said body also having a narrow axial hole from which the pressurized water emerges.
  • the nozzle is immersed in a body of liquid in the form of the water filling the chamber, in which body of liquid the nozzle lies in an inclined position with its top resting against the axial exit hole of the chamber, and its lateral wall resting against the chamber.
  • the nozzle By virtue of the rotation of the body of liquid impressed on the water by its axial feed, the nozzle is subjected to rotary motion about the chamber axis, by which the water jet leaving the nozzle travels in the form of a conical surface having a vertex angle double the inclination of the nozzle axis to the chamber axis.
  • said rotary motion has a velocity of the order of 2000-3000 r.p.m.
  • Rotary nozzle delivery devices of the aforedescribed type operate more effectively the higher the rotational velocity of the nozzle about the axis of the cylindrical chamber containing it.
  • the rotational velocity of the nozzle about its axis is regulated by regulating the friction coefficient, or rather the friction force, arising from the sliding of the nozzle against the cylindrical wall of the chamber.
  • the velocity of rotation of the nozzle about its axis is about one half the velocity of rotation of the nozzle about the chamber axis and is in the same direction thereas.
  • a serious drawback of the aforesaid known art is that the need to maintain a high rotational velocity of the body of liquid containing the nozzle, the braking action exerted between the chamber surface and the nozzle surface, and the consequent turbulence of the body of liquid give rise to negative phenomena.
  • the object of the present invention is to optimize the velocity of rotation of the nozzle about its own axis and about the axis of the cylindrical chamber which contains it, while at the same time minimizing the pressure drop and consequently the turbulence in the body of liquid containing the nozzle.
  • This object is attained by choosing the materials of the nozzle (the rotor) and of its containing chamber (the stator) such as to minimize the friction coefficient between them.
  • the water feed conduits to the stator can be not only of greater cross-section but also possibly have an axial direction with a lesser tangential component.
  • the resultant pressure drop enables water to be fed to the stator at a lower pressure without compromising the effectiveness of the exit jet, so allowing jet washers to be constructed of lower power and cost than currently known jet washers of equal performance.
  • the figures show a delivery Lance comprising a tubular-body 1 acting as a handgrip 2, connected at one end 3 to the water feed hose and having a delivery end 4.
  • the end 3 communicates with a piece 6 containing the rotary nozzle, as best seen in Figure 2.
  • the piece 6 is substantially shaped as a cup 7 having in its end an axial aperture 8, and having an internal section which tapers stepwise towards its end.
  • the widest part of the cup 7 sealedly receives the end of the water feed conduit, having a closed head 91 in which peripheral inclined ducts 92 are provided.
  • Said peripheral ducts open into the cup 7, in proximity to its wall, in a direction having a tangential component.
  • the head 91 of the conduit 9 defines within the cup 7 a chamber 10 containing a nozzle 11.
  • the nozzle comprises an insert 110 of ceramic or another suitable hard anti-wear material, which is of hemispherical shape and sealedly rests in a conjugate ceramic seat provided in a ring 71 inserted into the narrowest section of the cup 7.
  • the body of the nozzle 11 has a frusto-conical portion 111 intended to rest against the inner cylindrical wall 72 of the cup 7, and an axial sized duct 112 having a diameter which in the illustrated example is 1.25 mm.
  • two ducts 92 are provided, each of 1.5 mm 2 cross-section, their inclination to the plane perpendicular to the axis of the chamber 10 being 0°.
  • the velocity of rotation of the nozzle 11 about its own axis is at least 10% less than its velocity of rotation about the axis of the chamber 10.
  • the cup 7 is constructed of acetal resin monopolymer filled with teflon micropowder, which has a dynamic friction coefficient against itself of the order of 0.30.
  • This resin (deldrin + teflon) is known as DE9156 and is manufactured and marketed by Du Pont de Nemours Italiana S.p.A.
  • the body of the nozzle 11 is constructed of acetal resin monopolymer modified with silicone, which has a dynamic friction coefficient against itself of the order of 0.10, is known as DE8903 and is manufactured and marketed by Du Pont de Nemours Italiana S.p.A.
  • the dynamic friction coefficient between said two materials is about 0.19 under dry conditions, and much less under wet conditions.

Claims (5)

  1. Hochdruck-Wasserausgabelanze mit einer Rotationsdüse, die eine als Stator bekannte zylindrische Kammer aufweist, welcher unter Druck stehendes Wasser über mindestens eine tangentiale Leitung zuführbar ist, deren Richtung eine axiale Komponente aufweist, und in welcher eine als Rotor bekannte Düse rotiert,
    gekennzeichnet durch
    eine zumindest teilweise kegelstumpfförmige Wand, die auf der Kammerfläche rollt und auf derselben entlang der gesamten Länge ihrer Erzeugenden aufliegt, wobei eine in axialer Richtung dimensionierte Bohrung und ein Ende dichtend in einem Endsitz der Kammer ruhen, und wobei der Rotor und der Stator aus Materialien gebildet sind, deren dynamischer Reibungskoeffizient gegenüber einander geringer ist als 0,2.
  2. Hochdruckwasserausgabelanze mit einer Rotationsdüse (11) nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die den Rotor und den Stator bildenden Materialien Kunstharze sind.
  3. Hochdruckwasserausgabelanze mit einer Rotationsdüse (11) nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die den Rotor und den Stator bildenden Materialien Acetalharze sind.
  4. Hochdruckwasserausgabelanze mit einer Rotationsdüse (11) nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die den Rotor und den Stator bildenden Materialien Acetalharze sind, die mit Teflon-Mikropulver gefüllt sind.
  5. Hochdruckwasserausgabelanze mit einer Rotationsdüse (11) nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die den Rotor und den Stator bildenden Materialien Acetalharze sind, die mit Silikon modifiziert sind.
EP97202633A 1997-05-22 1997-08-28 Zerstäuber mit rotierender Düse Expired - Lifetime EP0879644B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE970034 1997-05-22
IT97RE000034A IT1294433B1 (it) 1997-05-22 1997-05-22 Lancia erogatrice a ugello rotante

Publications (3)

Publication Number Publication Date
EP0879644A2 EP0879644A2 (de) 1998-11-25
EP0879644A3 EP0879644A3 (de) 2002-01-16
EP0879644B1 true EP0879644B1 (de) 2004-07-07

Family

ID=11399045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97202633A Expired - Lifetime EP0879644B1 (de) 1997-05-22 1997-08-28 Zerstäuber mit rotierender Düse

Country Status (4)

Country Link
EP (1) EP0879644B1 (de)
AT (1) ATE270587T1 (de)
DE (2) DE69729788T2 (de)
IT (1) IT1294433B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3422328B2 (ja) * 2001-01-05 2003-06-30 東陶機器株式会社 吐水装置
JP3422786B2 (ja) * 2001-02-27 2003-06-30 東陶機器株式会社 流体噴出装置
ATE407269T1 (de) 2001-02-27 2008-09-15 Toto Ltd Fluidspritzvorrichtung
US6766967B2 (en) 2002-05-07 2004-07-27 Gp Companies, Inc. Magnet-driven rotary nozzle
EP2038067B1 (de) 2006-06-30 2017-11-29 Nilfisk A/S Drehdüse
EP1920847B1 (de) * 2006-11-09 2017-04-05 Nilfisk A/S Rotordüse für ein Hochdruckreinigungsgerät

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4542853A (en) * 1983-01-14 1985-09-24 Diamond Harvey E Fluid valve with directional outlet jet of continuously changing direction
EP0393689A1 (de) * 1989-04-20 1990-10-24 Ingo R. Dipl.-Ing. Friedrichs Verfahren zur Wirkungsverbesserung einer einen bewegbaren Fluidstrahl erzeugenden Düse und Vorrichtung zur Durchführung des Verfahrens
US5201468A (en) * 1991-07-31 1993-04-13 Kohler Co. Pulsating fluid spray apparatus
US5415130A (en) * 1994-01-14 1995-05-16 Brackett; Alan C. Sprinkler for washing the udders of dairy animals

Also Published As

Publication number Publication date
DE29716005U1 (de) 1997-10-23
DE69729788D1 (de) 2004-08-12
EP0879644A3 (de) 2002-01-16
DE69729788T2 (de) 2004-11-11
ATE270587T1 (de) 2004-07-15
EP0879644A2 (de) 1998-11-25
ITRE970034A1 (it) 1998-11-22
IT1294433B1 (it) 1999-03-24

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