EP2038067B1 - Buse rotative - Google Patents

Buse rotative Download PDF

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Publication number
EP2038067B1
EP2038067B1 EP06765965.6A EP06765965A EP2038067B1 EP 2038067 B1 EP2038067 B1 EP 2038067B1 EP 06765965 A EP06765965 A EP 06765965A EP 2038067 B1 EP2038067 B1 EP 2038067B1
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EP
European Patent Office
Prior art keywords
nozzle
nozzle member
chamber
end portion
house
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.)
Active
Application number
EP06765965.6A
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German (de)
English (en)
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EP2038067A1 (fr
Inventor
Jørgen Madsen
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.)
Nilfisk AS
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Nilfisk AS
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Publication date
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Publication of EP2038067A1 publication Critical patent/EP2038067A1/fr
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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

  • the present invention relates generally to nozzles for high-pressure cleaning devices, and particularly to such nozzles provided with means making the jet of pressure fluid leaving the nozzle rotate relative to the main body of the nozzle of the cleaning device.
  • EP 0 879 644 B1 describes a rotating nozzle section of a cleaning device comprising a cylindrical nozzle house chamber in which there is provided a nozzle member, the exit end of which is in engagement with a seat in such a manner that the nozzle member can undergo pivotal or rotational movement within the cylindrical nozzle house chamber under the influence of high-pressure fluid circulating in the chamber.
  • the nozzle member comprises a frusto-conical portion, the outer surface of which rests against the inner wall of a corresponding portion of the nozzle house chamber, when the nozzle member is rotating.
  • the desired maximum rotational velocity of the nozzle member about its longitudinal axis is determined by the frictional force between the surface of the frusto-conical portion of the nozzle member and the corresponding portion of the inner wall of the nozzle house chamber.
  • Specific materials suitable for these parts and specific coefficients of friction are mentioned in the document. By the choice of suitable materials or coefficients of friction the rotational velocity of the nozzle member about its own longitudinal axis can be determined.
  • DE 40 13 446 C1 describes a rotating nozzle section provided with a nozzle house chamber into which high-pressure fluid is led in a manner making the fluid in the nozzle house chamber rotate about the longitudinal axis hereof.
  • a nozzle member is rotatably provided in the nozzle house chamber and brought to rotate under the influence of the fluid rotating in the nozzle house chamber. A portion of the outer circumferential surface of the nozzle member is during rotation in contact with a corresponding portion of the inner wall of the nozzle house chamber via an O-ring.
  • EP 0 600 937 B1 describes a rotating nozzle for a cleaning device of a kind somewhat similar to the one described above and also comprising a nozzle house chamber in which a nozzle member is mounted for rotation about the longitudinal axis of the nozzle house driven by the cleaning fluid rotating in the nozzle house chamber.
  • the nozzle house chamber is provided with frusto-conical sidewalls along which the nozzle member moves rotated by the fluid in the chamber.
  • the nozzle member is furthermore at the end opposite its fluid exit provided with an axially extending channel, in which is accommodated a ball that due to the centrifugal force exerted on the ball during rotation of the nozzle member is urged against a contact surface provided at an adjacent longitudinal end of the nozzle house chamber.
  • the frictional force between the ball and the contact surface which force increases with the rotational velocity of the nozzle member, also serve to limit the rotational velocity of the nozzle member about the longitudinal axis of the nozzle house.
  • JP2004105790A describes a shower head having a rotation nozzle.
  • the nozzle is provided with a small throughgoing hole leading liquid through a sidewall into a central bore or chamber of the rotating nozzle.
  • the indicated hole in the rotating nozzle does not provide any significant cooperation with the fluid flowing in the showerhead, thus mainly supporting the starting of the rotation of the nozzle.
  • DE102004047586 describes a construction having a rotating body inside a housing, said rotating body providing vibration of the construction in order to vibrate the brushes provided at the end of the construction.
  • DE3836053 describes a construction in which a nozzle member is rotated by mechanical engagement with a turbine light drive construction.
  • DE 10104191 describes a construction having a rotating nozzle provided with an adjustable bypass opening provided with closing means in order to have the opening open whenever the rotating nozzle is in a non-rotating state in order to disturb the flow out of the nozzle for avoiding destructing influence on the surface (1) by the jets from the nozzle.
  • a rotating nozzle of the above kind comprising means for limiting the rotational velocity of the nozzle member about the longitudinal axis of the nozzle house and about its own longitudinal axis, hence maintaining a compact jet of cleaning fluid rotating at a certain predetermined optimal rotational velocity about the longitudinal axis of the nozzle house or within a certain predetermined velocity interval.
  • a desirable interval is between 2500 RPM to 3500 RPM.
  • these objects are attained by a single technical feature, thus serving the dual function of initiating the rotation of the nozzle member and limiting the final rotational velocity of the nozzle member.
  • the above objects are advantageously attained according to the present invention with a rotating nozzle member not comprising parts undergoing relative displacement or rotation to other parts of the nozzle member, as for instance the ball member described in EP 0 879 644 B1 .
  • the rotating nozzle according to the invention does in principle not place specific requirements on materials used for the different parts of the rotating nozzle or frictional coefficients between adjacent materials in the rotational nozzle apart from the fact that a sufficient friction must during rotation of the nozzle member in the nozzle house chamber be present at the contact point between the nozzle member and the corresponding portion of the inner wall of the nozzle house chamber in order to ensure that the nozzle member actually rolls on the inner wall of the nozzle house chamber during operation of the rotating nozzle.
  • the rotor nozzle comprises a nozzle house provided with a nozzle house chamber having a fluid exit opening through which a jet of cleaning fluid is ejected, where the exit opening comprises a seat co-operating with a first end portion of a nozzle member accommodated within said nozzle house chamber, such that the nozzle member can undergo pivotal and rotational movement relative to a longitudinal axis X through the nozzle house, the nozzle house being provided with an inlet chamber or inlet portion receiving cleaning fluid from a suitable fluid source, from which inlet chamber fluid flows through a diffuser into said nozzle house chamber, in which said nozzle member is provided, said diffuser causing the fluid in the nozzle house chamber to rotate about the longitudinal axis X of the nozzle house, in such a manner that this rotation of fluid causes the nozzle member to rotate about the longitudinal axis X of the nozzle house, and where a second end portion of the nozzle member longitudinally opposite said first end portion of the nozzle member is provided with at least one opening in the circum
  • a stabilising member is provided at the longitudinal end opposite said first end portion of said nozzle member.
  • an inner wall of the second end portion of the nozzle member may be provided with one or more fluid passages formed between thicker wall portions of the inner wall of the second end portion and an outer circumferential surface of an insert portion of the stabilising member, the fluid passages connecting the openings with the internal nozzle chamber.
  • at least one protrusion extending substantially radially outwardly from the circumferential surface of the nozzle member and adapted for co-operation with the fluid flowing in the nozzle house chamber is, according to the invention, provided on the nozzle member.
  • the said one or more openings could be of a substantially square or rectangular configuration and formed in said second end portion of the nozzle member, as will be described in further details in the detailed description of the invention.
  • other shapes of openings may be used according to the invention, such as circular or elliptic openings.
  • the diffuser is, in a manner that is known per se within the art, provided with fluid passages leading from the inlet chamber and exiting substantially tangentially in the nozzle house chamber, whereby the fluid entering the nozzle house chamber is brought to rotate about the longitudinal axis of the nozzle house.
  • the one or more rotation impeding openings and protrusions are acted upon by the rotating body of fluid in the nozzle house chamber in a manner which will be more fully understood with reference to a description of an embodiment of the invention given in the following.
  • the fluid action of said one or more openings will initially have the effect that the nozzle member starts to rotate, and when a certain maximum desired rotational velocity of the nozzle member has been reached, fluid action on the opening(s) will impede the rotation of the nozzle member due to a counter rotation of the nozzle member itself about its own longitudinal axis, thus setting the maximum rotational velocity of the nozzle member.
  • said openings can furthermore provide fluid communication between the nozzle house chamber and a nozzle chamber inside the nozzle member from which the fluid can exit through a nozzle outlet in the first end portion of the nozzle member as a jet of cleaning fluid.
  • the nozzle member is furthermore provided with a stabiliser at the second end portion of the nozzle member, which due to the inertia/moment of inertia of the stabiliser stabilises the movement of the nozzle member.
  • the stabiliser could form part of the velocity limiting means.
  • the stabiliser forms part of the above-mentioned fluid passages.
  • said stabiliser could be made of metal (for instance aluminium) or another relatively heavy material
  • the first end portion of the nozzle could be made of a ceramic material to reduce abrasion of this portion of the nozzle member
  • the remaining parts of the nozzle member could be made of a plastics material, for instance the same material as the nozzle house itself.
  • the seat mentioned above could for instance also be made of a ceramic material.
  • FIG 1(a) there is shown a longitudinal cross sectional view of the rotating nozzle according to an embodiment of the invention generally indicated by reference numeral 1 in figure 1(a) .
  • the rotary nozzle 1 comprises a nozzle house 2, forming a body of revolution about a longitudinal axis X.
  • the nozzle house 2 At one longitudinal end the nozzle house 2 is provided with an inlet 3, through which cleaning fluid under pressure is led to an inlet chamber 4 terminated by a diffuser 5 sealed against the inner surface of the inlet chamber 4, for instance by an O-ring 6.
  • the details of the diffuser 5 according to this embodiment of the invention are shown in figure 1 (b) .
  • the diffuser 5 comprises two portions 23 and 24, the latter provided with the sealing O-ring 6, and an internal chamber 21 effectively forming part of the total inlet chamber 4, when the diffuser is provided in the nozzle house.
  • the upper end face of the portion 24 rests against a shoulder portion 25 on the inside of the nozzle house.
  • Portion 23 of the diffuser 5 has a diameter a little less than the diameter of the corresponding portion of the inner surface of the nozzle house, whereby a circumferential gap 22 is formed between portion 23 of the diffuser 5 and the corresponding portion of the inner surface of the nozzle house.
  • Fluid communicating canals 26 are provided between the chamber 21 and the circumferential surface of portion 23 of the diffuser 5 in such a manner that fluid is led substantially tangentially relative to the longitudinal axis X of the nozzle house out into the gap 22 through openings 20. By these means fluid leaving the diffuser will eventually rotate in the nozzle house chamber 7.
  • the nozzle house 2 is provided with an internal chamber, the nozzle house chamber 7, in which a hollow nozzle member 8 is pivotably/rotationally guided by engagement between a first end portion 13 of the nozzle member 8 and a corresponding seat 14.
  • This seat 14 is provided at a fluid exit opening 15 of the nozzle house longitudinally opposite the inlet 3.
  • a nozzle member 8 according to an embodiment of the invention will now be described with reference to figures 1(a) and 2 .
  • the nozzle member 8 comprises a substantially tubular body around a longitudinal axis X N .
  • the nozzle member 8 is provided with an internal nozzle chamber 12 at one longitudinal end terminated by a first end portion 13 comprising a rounded (spherical) portion 13' for engagement with a similarly shaped inner portion of the seat 14.
  • This arrangement allows the nozzle member 8 to undergo pivotal or rotational movement relative to the seat 14 and hence to the nozzle house 2.
  • the end portion 13 is provided with a nozzle outlet 18 for fluid passing through the nozzle member 8. This fluid can leave the nozzle house 2 through the fluid exit opening 15.
  • the longitudinal end of the nozzle member 8 opposite the first end portion 13 is provided with an end portion 9, in the shown embodiment of a somewhat larger outer diameter than the main middle portion of the nozzle member 8.
  • a stabilising member 11 made of a relatively heavy material, such as aluminium, which stabilises the movement of the nozzle member 8 due to its inertia/moment of inertia.
  • the stabiliser 11 may be provided with a cylindrical insert portion 17 fitting tightly into the cylindrical inner space of the end portion 9 of the nozzle member 8. During rotational movement of the nozzle member 8 within the nozzle house chamber 7, a portion of the circumferential surface of the stabiliser 11 moves in contact with the inner surface of the nozzle house chamber as indicated by P in figure 1(a) .
  • the end portion 9 of the nozzle member 8 is furthermore provided with one or more radial openings 10 distributed over the circumferential surface of the end portion 9. The purposes of these openings have been described initially in the summary of the invention and will be further described in connection with figure 3 .
  • the nozzle member 8 is according to this embodiment, provided with fluid passages 19 connecting the openings 10 with the internal nozzle chamber 12 of the nozzle member 8.
  • Such passages are distributed along the insert portion 17 of the stabiliser 11 from each corresponding opening 10 to the internal nozzle chamber 12.
  • the complete fluid path through the rotating nozzle is from the inlet 3 through the inlet chamber 4 and via the passages 26 in the stabiliser 5 to the nozzle house chamber 7, and from hence via the passages 19 to the inner nozzle chamber 12 of the nozzle member 8, and finally through the nozzle outlet 18.
  • FIG 3 there is shown a schematic representation of a lateral cross sectional view along line AA in figure 2 , shown partly to explain the function of the rotating nozzle mechanism according to the present invention.
  • Figure 3 thus shows a cross sectional view through the nozzle house chamber 7 of the nozzle house 2 viewed towards the end face 17" of the stabiliser 11.
  • the rotating nozzle cleaning fluid rotates within the nozzle house chamber 7, as indicated by arrow B in figure 3 , and this fluid rotation causes the end of the nozzle member longitudinally opposite the nozzle exit 18 to rotate within the nozzle house chamber 7 along the inner circumferential surface hereof, as indicated by P.
  • the openings 10 serve the dual function initially to help starting the rotation of the nozzle member 8 and to determine the maximum rotational velocity of the rotating nozzle 8 according to the invention.
  • FIG 4 there is shown an exploded view of a specific embodiment of the nozzle member 8 according to the invention.
  • the inner wall of the end portion 9 of the nozzle member 8 is provided with a number of fluid passages/channels 19 formed between thicker wall portions 27 of the inner wall of the end portion 9 and the outer circumferential surface of the insert portion 17 of the stabiliser 11, when this is inserted into the end portion 9 of the nozzle member 8.
  • These fluid channels terminate in radially inwardly extending sections 28 communicating with the internal nozzle chamber 12 in the nozzle member 8.

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  • Nozzles (AREA)

Claims (8)

  1. Buse rotative pour appareil de nettoyage à haute pression comprenant un boîtier de buse (2) fourni avec une ouverture de sortie de fluide (15) comprenant un siège (14) coopérant avec une première partie d'extrémité (13) d'un élément de buse (8) comprenant une chambre de buse (12), de manière à ce que l'élément de buse (8) peut être subi à un movement pivotant et de rotation par rapport à une axe longitudinal (X) à travers le boîtier de buse (2), le boîtier de buse (2) étant fourni avec une chambre d'entrée (4), de laquelle coule un fluide à travers un diffuseur (5) dans une chambre de boîtier de buse (7) dans laquelle ledit élément de buse (8) est réalisé où une deuxième partie d'extrémité (9) dudit élément de buse (8) longitudinalement opposée à ladite première partie d'extrémité (13) de l'élément de buse (8) est fournie avec au moins une ouverture (10) dans la surface circonférentielle de l'élément de buse (8), et ledit élément de buse (8) est fourni à l'extrémité longitudinale opposée à ladite première partie d'extrémité (13) avec un élément stabilisant (11) qui stabilise le mouvement de rotation de l'élément de buse (8) dû à l'inertie/au moment de l'intertie de l'élément stabilisant (11),
    caractérisée en ce qu' une paroi intérieure de la deuxième partie d'extrémité (9) de l'élément de buse (8) est fournie avec un ou plusieurs passages de fluide (19) formés entre des parties de paroi plus épaisses de la paroi intérieure de la deuxième partie d'extrémité (9) et une surface circonférentielle extérieure d'une partie d'insert (17) de l'élément stabilisant (11), lesdits passages de fluide (19) reliant les ouvertures (10) avec la chambre de buse intérieure (12) de l'élément de buse (8).
  2. Buse rotative selon la revendication 1, caractérisée en ce qu'une deuxième partie d'extrémité (9) dudit élément de buse (8) longitudinalement opposée à la première partie d'extrémité (13) de l'élément de buse (8) est fournie avec au moins une protubérance s'étendant de la surface circonférentielle de l'élément de buse (8) en combinaison avec au moins une ouverture (10) dans la surface circonférentielle de l'élément de buse (8).
  3. Buse rotative selon la revendication 1, caractérisée en ce que ledit élément stabilisant (11) est inséré de manière détachable dans et retenu dans une extrémité longitudinale de ladite deuxième partie d'extrémité (9) de l'élément de buse (8).
  4. Buse rotative selon l'une quelconque des revendications précédentes, caractérisée en ce que lesdites ouvertures (10) sont formées à l'interface entre ladite deuxième partie d'extrémité (9) et ledit élément stabilisant (11) de manière à ce qu'une partie de l'ouverture est formée par l'élément stabilisant (11).
  5. Buse rotative selon l'une quelconque des revendications précédentes, caractérisée en ce que ladite une ou lesdites plusieurs ouvertures sont substantiellement quadratiques ou rectangulaires ou circulaires ou elliptiques.
  6. Buse rotative selon la revendication 1, caractérisée en ce que ladite chambre de buse (12) est en communication fluidique avec ladite chambre de boîtier de buse (7) par un ou plusieurs passages (19) dans l'élément de buse (8).
  7. Buse rotative selon la revendication 6, caractérisée en ce que ledit un ou lesdits plusieurs passages (19) relient ladite chambre de buse (12) avec ladite une ou lesdites plusieurs ouvertures (10) dans la surface circonférentielle de l'élément de buse (8) moyennant quoi du fluide peut couler de la chambre de boîtier de buse (7) à travers lesdites ouvertures (10) et lesdits passages (19) dans la chambre de buse (12).
  8. Buse rotative selon la revendication 7, caractérisée en ce que lesdits passages (19) sont formés dans la paroi circonférentielle intérieure de la partie d'extrémité (9) de l'élément de buse (8) et définis par des parties de paroi (27), s'étendant radialement vers l'intérieur, de la partie d'extrémité (9) de l'élément de buse (8) et la surface circonférentielle extérieure de la partie d'insert (17) de l'élément stabilisant (11), lorsque le dernier est inséré dans la partie d'extrémité (9).
EP06765965.6A 2006-06-30 2006-06-30 Buse rotative Active EP2038067B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2006/052200 WO2008004030A1 (fr) 2006-06-30 2006-06-30 Buse rotative

Publications (2)

Publication Number Publication Date
EP2038067A1 EP2038067A1 (fr) 2009-03-25
EP2038067B1 true EP2038067B1 (fr) 2017-11-29

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ID=37461106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06765965.6A Active EP2038067B1 (fr) 2006-06-30 2006-06-30 Buse rotative

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EP (1) EP2038067B1 (fr)
WO (1) WO2008004030A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009023647A1 (de) * 2009-05-25 2010-12-02 Alfred Kärcher Gmbh & Co. Kg Rotordüse für ein Hochdruckreinigungsgerät
CN103920608A (zh) * 2013-01-10 2014-07-16 林文斌 用于旋转喷头的氧化铝陶瓷材料及润滑方法
DK3888796T3 (en) 2018-11-05 2023-11-13 P A S P A Rotary jet nozzle assembly for pressure cleaning devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3836053C1 (fr) * 1988-10-22 1990-01-11 Alfred Kaercher Gmbh & Co, 7057 Winnenden, De
DE10104191A1 (de) * 2001-01-31 2002-08-01 Anton Jaeger Rotordüse
JP2004105790A (ja) * 2002-09-13 2004-04-08 Toto Ltd 吐水装置
DE102004047586A1 (de) * 2004-09-23 2006-04-06 Alfred Kärcher Gmbh & Co. Kg Reinigungskopf
EP1719557A1 (fr) * 2005-05-03 2006-11-08 Hans Einhell AG Buse rotative pour dispositif de nettoyage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013446C1 (fr) 1990-04-27 1991-05-08 Alfred Kaercher Gmbh & Co, 7057 Winnenden, De
DE9108507U1 (de) * 1991-07-10 1991-11-07 Anton Jäger Montagebau, 7913 Senden Rotordüse für ein Hochdruckreinigungsgerät
DE4129026C1 (fr) 1991-08-31 1993-03-04 Alfred Kaercher Gmbh & Co, 7057 Winnenden, De
IT1294433B1 (it) 1997-05-22 1999-03-24 Interpump Group S P A Lancia erogatrice a ugello rotante

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3836053C1 (fr) * 1988-10-22 1990-01-11 Alfred Kaercher Gmbh & Co, 7057 Winnenden, De
DE10104191A1 (de) * 2001-01-31 2002-08-01 Anton Jaeger Rotordüse
JP2004105790A (ja) * 2002-09-13 2004-04-08 Toto Ltd 吐水装置
DE102004047586A1 (de) * 2004-09-23 2006-04-06 Alfred Kärcher Gmbh & Co. Kg Reinigungskopf
EP1719557A1 (fr) * 2005-05-03 2006-11-08 Hans Einhell AG Buse rotative pour dispositif de nettoyage

Also Published As

Publication number Publication date
EP2038067A1 (fr) 2009-03-25
WO2008004030A1 (fr) 2008-01-10

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