EP0879644A2 - Delivery lance with rotary nozzle - Google Patents
Delivery lance with rotary nozzle Download PDFInfo
- Publication number
- EP0879644A2 EP0879644A2 EP97202633A EP97202633A EP0879644A2 EP 0879644 A2 EP0879644 A2 EP 0879644A2 EP 97202633 A EP97202633 A EP 97202633A EP 97202633 A EP97202633 A EP 97202633A EP 0879644 A2 EP0879644 A2 EP 0879644A2
- 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.)
- Granted
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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.
- 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.
Abstract
Description
Claims (5)
- A high-pressure water delivery lance with rotary nozzle, comprising a cylindrical chamber known as the stator, which is fed with pressurized water via at least one tangential conduit the direction of which has an axial component, and in which there rotates a nozzle known as the rotor having an at least partly frusto-conical wall which rolls on the chamber surface, a sized axial hole and an end sealedly resting in an end seat of the chamber, characterised in that the rotor and stator are formed of materials having between them a dynamical friction coefficient of less than 0.20.
- A high-pressure water delivery lance with rotary nozzle as claimed in claim 1, characterised in that the constituent materials of the rotor and stator are synthetic resins.
- A high-pressure water delivery lance with rotary nozzle as claimed in claim 1, characterised in that the constituent materials of the rotor and stator are acetal resins.
- A high-pressure water delivery lance with rotary nozzle as claimed in claim 1, characterised in that the constituent materials of the rotor and stator are acetal resins filled with teflon micropowder.
- A high-pressure water delivery lance with rotary nozzle as claimed in claim 1, characterised in that the constituent materials of the rotor and stator are acetal resins modified with silicone.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRE970034 | 1997-05-22 | ||
IT97RE000034A IT1294433B1 (en) | 1997-05-22 | 1997-05-22 | ROTATING NOZZLE DISPENSER |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0879644A2 true EP0879644A2 (en) | 1998-11-25 |
EP0879644A3 EP0879644A3 (en) | 2002-01-16 |
EP0879644B1 EP0879644B1 (en) | 2004-07-07 |
Family
ID=11399045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97202633A Expired - Lifetime EP0879644B1 (en) | 1997-05-22 | 1997-08-28 | Delivery lance with rotary nozzle |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0879644B1 (en) |
AT (1) | ATE270587T1 (en) |
DE (2) | DE69729788T2 (en) |
IT (1) | IT1294433B1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002068766A1 (en) * | 2001-02-27 | 2002-09-06 | Toto Ltd. | Fluid jetting device |
JP2002336741A (en) * | 2001-02-27 | 2002-11-26 | Toto Ltd | Fluid ejecting device |
JP2003176560A (en) * | 2001-01-05 | 2003-06-24 | Toto Ltd | Water discharging device |
WO2008004030A1 (en) | 2006-06-30 | 2008-01-10 | Nilfisk-Alto A/S | Rotating nozzle |
EP1920847A1 (en) | 2006-11-09 | 2008-05-14 | Nilfisk-ALTO A/S | Rotating nozzle for a high-pressure cleaning device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6766967B2 (en) * | 2002-05-07 | 2004-07-27 | Gp Companies, Inc. | Magnet-driven rotary nozzle |
Family Cites Families (4)
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 |
DE9004452U1 (en) * | 1989-04-20 | 1990-06-21 | Friedrichs, Ingo, Dipl.-Ing., 4432 Gronau, De | |
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 |
-
1997
- 1997-05-22 IT IT97RE000034A patent/IT1294433B1/en active IP Right Grant
- 1997-08-28 EP EP97202633A patent/EP0879644B1/en not_active Expired - Lifetime
- 1997-08-28 AT AT97202633T patent/ATE270587T1/en not_active IP Right Cessation
- 1997-08-28 DE DE69729788T patent/DE69729788T2/en not_active Expired - Fee Related
- 1997-09-06 DE DE29716005U patent/DE29716005U1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003176560A (en) * | 2001-01-05 | 2003-06-24 | Toto Ltd | Water discharging device |
WO2002068766A1 (en) * | 2001-02-27 | 2002-09-06 | Toto Ltd. | Fluid jetting device |
JP2002336741A (en) * | 2001-02-27 | 2002-11-26 | Toto Ltd | Fluid ejecting device |
US6925659B2 (en) | 2001-02-27 | 2005-08-09 | Toto Ltd. | Fluid jetting device |
WO2008004030A1 (en) | 2006-06-30 | 2008-01-10 | Nilfisk-Alto A/S | Rotating nozzle |
EP1920847A1 (en) | 2006-11-09 | 2008-05-14 | Nilfisk-ALTO A/S | Rotating nozzle for a high-pressure cleaning device |
WO2008056218A2 (en) | 2006-11-09 | 2008-05-15 | Nilfisk-Alto A/S | Rotating nozzle for a high-pressure cleaning device |
WO2008056218A3 (en) * | 2006-11-09 | 2008-07-10 | Nilfisk Alto As | Rotating nozzle for a high-pressure cleaning device |
CN101594941B (en) * | 2006-11-09 | 2012-11-21 | 力奇-先进股份公司 | Rotating nozzle for a high-pressure cleaning device |
Also Published As
Publication number | Publication date |
---|---|
EP0879644A3 (en) | 2002-01-16 |
IT1294433B1 (en) | 1999-03-24 |
ATE270587T1 (en) | 2004-07-15 |
ITRE970034A1 (en) | 1998-11-22 |
DE69729788D1 (en) | 2004-08-12 |
DE69729788T2 (en) | 2004-11-11 |
DE29716005U1 (en) | 1997-10-23 |
EP0879644B1 (en) | 2004-07-07 |
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