WO2008004030A1 - Rotating nozzle - Google Patents
Rotating nozzle Download PDFInfo
- Publication number
- WO2008004030A1 WO2008004030A1 PCT/IB2006/052200 IB2006052200W WO2008004030A1 WO 2008004030 A1 WO2008004030 A1 WO 2008004030A1 IB 2006052200 W IB2006052200 W IB 2006052200W WO 2008004030 A1 WO2008004030 A1 WO 2008004030A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- house
- chamber
- nozzle member
- end portion
- Prior art date
Links
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 rnan- ner 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 rota- tional 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 longitu- dinal 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 frictionat 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.
- 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 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 mate- rials 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 por- tion of the nozzle member is provided with at least one opening
- 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 are acted upon by the rotating body of fluid in the nozzle house chamber in a manner which wilt 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 in-side 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.
- 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 stabi-liser could form part of the velocity limiting means and/or 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.
- figure 1(a) shows a longitudinal cross sectional view of the nozzle section according to an embodiment of the invention
- figure 1(b) shows a diffuser used in the embodiment of figure 1 (a);
- figure 2 shows a further longitudinal cross sectional view of the nozzle section of the embodiment shown in figure 1, specifically illustrating the presence of a fluid pas- sage leading from the nozzle house chamber to an interior chamber in the nozzle member;
- figure 3 shows a schematic representation of a lateral cross sectional view along line A - A in figure 2, illustrating the operational principle of the invention.
- figure 4 shows a schematic exploded perspective view of an embodiment of the nozzle member according to the invention.
- 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 numerai 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 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.
- the nozzle house 2 is provided with an internal chamber, the nozzle house chamber 7, in which a hollow nozzle member 8 is pivota- bly/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.
- the nozzle member 8 comprises a substantially tubular body around a longitudinal axis Xi M -
- 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 end por- tion 17 fitting tightly into the cylindrical inner space of the end portion 9 of the nozzle member 8.
- 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, of which only a single is shown in cross sectional view in figure 2, are distributed along the insert portion 17 of the stabiliser 1 1 from each corresponding opening 10 to the internal nozzle chamber 12.
- the complete fluid path through the rotating nozzle is from the intet 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
- Also indicated in figure 3 is a single of the openings 10 in the circumferentia! surface of the end portion 9 of the nozzle member 8.
- 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 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 radiaiiy inwardly extending sections 28 communicating with the second nozzle chamber 12 in the nozzle member 8.
Abstract
The present invention relates to a rotating nozzle for high-pressure cleaning devices comprising a nozzle house (2) provided with a fluid exit opening (15) comprising a seat (14) co-operating with a first end portion (13) of a nozzle member (8), such that the nozzle member (8) can undergo pivotal or rotational movement relative to a lon- gitudinal axis (X) through the nozzle house (2), the nozzle house (2) being provided with an inlet charnber(4), from which fluid flows through a diffuser (5) into a nozzle house chamber (7), in which said nozzle member (8) is provided, where the nozzle member (8) according to a specific embodiment of the invention, is furthermore provided with a second end portion (9) longitudinally opposite the first end portion (13) of the nozzle member (8), which second portion is provided with at least one opening (10) serving the dual purpose of initiating rotation of the nozzle member (8) and determining its maximum rotational velocity.
Description
ROTATING NOZZLE
TECHNICAL FIELD
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.
BACKGROUND OF THE INVENTION
It is known within the art to apply rotating nozzles in connection with high-pressure cleaning devices.
Thus for instance 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 rnan- ner 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 rota- tional 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. As in the above
document 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. The coefficient of friction between this O-ring and the inner wall of the nozzle house chamber is described as limiting the rotational velocity of the nozzle member itseif about its own longitudinal axis, thereby maintaining a compact jet of cleaning fluid circulating in the surrounding space as a consequence of the rotation of the nozzle member about the longitudinal axis of the nozzte house itself.
Furthermore 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 longitu- dinal 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. Between the nozzle member and the side wails of the nozzle house chamber is inserted two O-rings, which (partly through interaction with the fluid in the chamber) during rota- tion of the nozzle member impede the rotational movement of the nozzle member about the longitudinal axis of the nozzle house and hence function as a break, limiting the rotational velocity of the nozzle member about the longitudinal axis of the nozzle house. 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 frictionat 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.
It is a problem of rotating nozzle arrangements that a very high velocity of cleaning fluid is required in order to initiate rotational movement of the nozzle member in the nozzle house chamber and to overcome friction. Furthermore it is required to limit the rotational velocity of the nozzle member both above the longitudinal axis of the
nozzle house and about the nozzle members own longitudinal axis in order to obtain optimal cleaning efficiency.
SUMMARY OF THE INVENTION
On the above background it is an object of the present invention to provide 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. Although other velocity intervals may be chosen a desirable interval is between 2500 RPM to 3500 RPM.
It is a further object of the invention to provide means for initiating the rotation of the nozzle member.
Desirably, although not necessarily, 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
At least according to specific embodiments of the invention, it is a further object to provide said velocity limiting/rotation initiating means in such a manner that these means can also function at least as part of one or more fluid communication passages leading cleaning fluid from the nozzle house chamber to the fluid exit 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 Bl Furthermore 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 mate- rials 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.
These and further objects and advantages are according to the invention attained with a rotating nozzle for a high-pressure cleaning device as defined by claim 1. An alternative to the rotating nozzle defined by claim 1 , which does also fali within the scope of the present invention, is defined in claim 2.
Thus the rotor nozzle according to the invention 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 por- tion of the nozzle member is provided with at least one opening in the circumferential surface of the nozzle member and adapted for co-operation with the fluid flowing in the nozzle house chamber, As an alternative, as defined by claim 2, 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 could, according to the invention, be provided on the nozzle member. Even combinations of said openings and protrusions provided on the nozzle member would be conceivable and would fall within the scope of the present invention.
Specifically 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. Alternatively, 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 (or alternatively protrusions) are acted upon by the rotating body of fluid in the nozzle house chamber in a manner which wilt 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.
According to an embodiment of the invention, said openings can furthermore provide fluid communication between the nozzle house chamber and a nozzle chamber in-side 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.
According to a preferred embodiment of the invention, 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. Preferably - although not necessarily - the stabi-liser could form part of the velocity limiting means and/or the above-mentioned fluid passages.
According to a specific embodiment of the invention, 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, and 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.
BRIEF DESCRIPTION QF THE DRAWINGS
The invention itself and its mode of operation will be better understood with refer- ence to the following detailed description of an embodiment hereof in conjunction with the figures of the drawing, where
figure 1(a) shows a longitudinal cross sectional view of the nozzle section according to an embodiment of the invention;
figure 1(b) shows a diffuser used in the embodiment of figure 1 (a);
figure 2 shows a further longitudinal cross sectional view of the nozzle section of the embodiment shown in figure 1, specifically illustrating the presence of a fluid pas- sage leading from the nozzle house chamber to an interior chamber in the nozzle member;
figure 3 shows a schematic representation of a lateral cross sectional view along line A - A in figure 2, illustrating the operational principle of the invention; and
figure 4 shows a schematic exploded perspective view of an embodiment of the nozzle member according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
In the following a detailed description of a specific embodiment of the rotating nozzle according to the invention is described, but it is understood that a person skilled in the art will be able to conceive other embodiments of the basic inventive concepts
set forth in the summary of the invention without deviating from the scope of the invention as defined by the independent claim.
Thus with reference to figure 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 numerai 1 in figure 1 (a). The rotary nozzle 1 comprises a nozzle house 2, forming a body of revolution about a longitudinal axis X. 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.
Referring again to figure 1(a) the nozzle house 2 is provided with an internal chamber, the nozzle house chamber 7, in which a hollow nozzle member 8 is pivota- bly/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 XiM- 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. In this end portion 9 there ts inserted 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 end por- tion 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.
Referring to figure 2, the complete fluid path from the inlet 3 to the nozzle outlet 18 of the rotating nozzle according to this embodiment of the invention is described. Specifically 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, of which only a single is shown in cross sectional view in figure 2, are distributed along the insert portion 17 of the stabiliser 1 1 from each corresponding opening 10 to the internal nozzle chamber 12. Thus the complete fluid path through the rotating nozzle according to this embodiment of the invention is from the intet 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.
Referring to figure 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 Also indicated in figure 3 is a single of the openings 10 in the circumferentia! surface of the end portion 9 of the nozzle member 8. During operation of 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. During this rotation of the complete nozzle member (arrow B) the nozzle member 8 itself is forced - due to friction at point P between the corresponding portions of the nozzle member and the inner wall of the nozzle house chamber - to undergo rotation in the opposite rotational direction about its longitudinal axis XN as indicated by arrow C in figure 3. The nozzle member 8 will thus undergo rotation against the rotational direction of the fluid in the nozzle house cham- ber as it rolls on the inner circumferential surface of the nozzle house chamber. This counter rotation of the nozzle member will cause the openings 10 to impede the rotation of the nozzle member 8 around the longitudinal axis X of the nozzle house, thereby functioning as a break, which determines the maximum rotational velocity of the nozzle member 8 about the longitudinal axis X of the nozzle house 2, Thus, as described previously, 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.
Referring to figure 4, there is shown an exploded view of a specific embodiment of the nozzle member 8 according to the invention. In this embodiment the inner wall of the end portion 9 of the nozzle member 8 is provided with a number of fluid 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 radiaiiy inwardly extending sections 28 communicating with the second nozzle chamber 12 in the nozzle member 8.
It is understood that other specific configurations of fluid channels may also be de- vised by a person skilled in the art without deviating from the scope of the invention.
LIST OF REFERENCE NUMERALS
I, Nozzle section 2. Nozzle house
3. Inlet
4. Inlet chamber
5. Diffuser
6. O-ring 7. First nozzle chamber
8. Nozzle member
9. End portion of nozzle member
10. Opening in end portion
I 1. Stabiϋser 12. Second nozzle chamber
13. Ceramic end portion of nozzle member 13'. Rounded portion of ceramic end portion
14, Ceramic seat
14'. Rounded portion of ceramic seat 15. Fluid exit opening of nozzle house
16. Inclined inner wail of fluid exit opening
17. insert portion of stabiliser
18. Nozzle outlet
19. Fluid passage in nozzle member 20. Tangential openings in fluid passages in diffuser
21. Internal chamber of diffuser
22. Gap between diffuser and nozzle house chamber
23. Gap-forming portion of diffuser
24. Second (sealing) portion of diffuser 25. Internal shoulder of nozzle house chamber
26. Fluid communication canals in diffuser
27. Inner wall portions of second portion of nozzle member
28. Thicker (radially inwardly extending) wall portions 27 X. Longitudinal axis of nozzle house XN Longitudinal axis of nozzle member
Claims
1 , Rotating nozzie for a high-pressure deaniπg device comprising a nozzle house (2) provided with a fluid exit opening ( 15) comprising a seat ( 14) co-operating with a first end portion (13) of a nozzle member (8) comprising a nozzle chamber ( 12), such that the nozzie member (8) can undergo pivotal and rotational movement relative to a longitudinal axis (X) through the nozzle house (2), the nozzle house (2) being provided with an inlet chamber(4), from which fluid flows through a diffuser (5) into a nozzle house chamber (7), in which said nozzie member (8) is provided, characterised in that a second end portion (9) of said nozzle member (8) longitudinally opposite said first end portion (13) of the nozzle member (8) is provided with at least one opening in the circumferential surface of the nozzle member (8).
2. Rotating nozzle for a high-pressure cleaning device comprising a nozzle house (2) provided with a fluid exit opening (15) comprising a seat (14) co-operating with a first end portion (13) of a nozzle member (8) comprising a nozzie chamber (12), such that the nozzie member (8) can undergo pivotal or rotational movement relative to a longitudinal axis (X) through the nozzle house (2), the nozzle house (2) being provided with an intet chamber(4), from which fluid flows through a diffuser (5) into a nozzle house chamber (7), in which said nozzle member (8) is provided, characterised in that a second end portion (9) of said nozzle member (8) longitudinally opposite said first end portion (13) of the nozzle member (8) is provided with at least one protrusion extending from the circumferential surface of the nozzie member (8) or a combination of at least one opening (10) in the circumferential surface of the nozzle member (8) and at least one of said protrusions.
3, Rotating nozzle according to claim 1 or 2, characterised in that said nozzle member (8) at the longitudinal end opposite said first end portion (13) is provided with a stabilising member (1 1) that stabilises the rotational movement of the nozzle member (8) due to the inertia/moment of inertia of the stabilising member (11 ).
4. Rotating nozzie according to claim 3, characterised in that said stabilising member (1 1) is releasably inserted into and retained in a longitudinal end of said second end portion (9) of the nozzle member (8),
5. Rotating nozzle according to claim 3 or 4, characterised in that said openings (10) are formed at the interface between said second end portion (9) and said stabilising member (1 1), such that a portion of the opening is formed by the stabiiising member (11).
6. Rotating nozzle according to any of the preceding claims, characterised in that said one or more openings are substantially square or rectangular or circular or elliptic,
7. Rotating nozzle according to claim 1 , characterised in that said nozzle chamber (12) is in fluid communication with said nozzle house chamber (7) via one or more passages (19) in the nozzle member (8).
8, Rotating nozzle according to claim 7, characterised in that said one or more passages (19) connect said nozzle chamber (12) with said one or more openings (10) in the circumferential surface of the nozzle member (8), whereby fluid can flow from the nozzle house chamber (7) through said openings (10) and said passages (19) into the nozzle chamber (12).
9. Rotating nozzle according to claim 8, characterised in that said passages (19) are formed in the inner circumferential wall of the end portion (9) of the nozzle member (8) and defined by radially inwardly extending wall portions (27) of the end portion (9) of the nozzle member (8) and the outer circumferential surface of the insert portion (17) of the stabiliser (1 1), when the latter is inserted into the end por- tion (9).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2006/052200 WO2008004030A1 (en) | 2006-06-30 | 2006-06-30 | Rotating nozzle |
EP06765965.6A EP2038067B1 (en) | 2006-06-30 | 2006-06-30 | Rotating nozzle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2006/052200 WO2008004030A1 (en) | 2006-06-30 | 2006-06-30 | Rotating nozzle |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008004030A1 true WO2008004030A1 (en) | 2008-01-10 |
Family
ID=37461106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2006/052200 WO2008004030A1 (en) | 2006-06-30 | 2006-06-30 | Rotating nozzle |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2038067B1 (en) |
WO (1) | WO2008004030A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010136412A1 (en) * | 2009-05-25 | 2010-12-02 | Alfred Kärcher Gmbh & Co. Kg | Rotary nozzle for a high-pressure cleaning device |
CN103920608A (en) * | 2013-01-10 | 2014-07-16 | 林文斌 | Aluminum oxide ceramic material and lubricating method applied to rotating nozzle |
EP3646953B1 (en) | 2018-11-05 | 2021-07-14 | P.A. S.p.A. | Rotary jet nozzle assembly for pressure cleaning devices |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3836053C1 (en) * | 1988-10-22 | 1990-01-11 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | |
DE4013446C1 (en) | 1990-04-27 | 1991-05-08 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | |
DE9108507U1 (en) * | 1991-07-10 | 1991-11-07 | Anton Jaeger Montagebau, 7913 Senden, De | |
EP0600937A1 (en) | 1991-08-31 | 1994-06-15 | Kaercher Gmbh & Co Alfred | Rotor nozzle for a high-pressure cleaning device. |
EP0879644A2 (en) | 1997-05-22 | 1998-11-25 | Interpump Group S.P.A. | Delivery lance with rotary nozzle |
DE10104191A1 (en) * | 2001-01-31 | 2002-08-01 | Anton Jaeger | Rotor jet for high pressure water cleaning system has at least one bypass aperture between inflow aperture and jet |
JP2004105790A (en) * | 2002-09-13 | 2004-04-08 | Toto Ltd | Water delivery device |
DE102004047586A1 (en) * | 2004-09-23 | 2006-04-06 | Alfred Kärcher Gmbh & Co. Kg | Cleaning head for purifier, has housing with which cleaning body is rigidly connected, and bobbin, arranged in interior, displaced from agent flowing through interior in motion, where housing is displaced with moving bobbin in oscillation |
EP1719557A1 (en) * | 2005-05-03 | 2006-11-08 | Hans Einhell AG | Rotary nozzle for cleaning device |
-
2006
- 2006-06-30 WO PCT/IB2006/052200 patent/WO2008004030A1/en active Application Filing
- 2006-06-30 EP EP06765965.6A patent/EP2038067B1/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3836053C1 (en) * | 1988-10-22 | 1990-01-11 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | |
DE4013446C1 (en) | 1990-04-27 | 1991-05-08 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | |
DE9108507U1 (en) * | 1991-07-10 | 1991-11-07 | Anton Jaeger Montagebau, 7913 Senden, De | |
EP0600937A1 (en) | 1991-08-31 | 1994-06-15 | Kaercher Gmbh & Co Alfred | Rotor nozzle for a high-pressure cleaning device. |
EP0879644A2 (en) | 1997-05-22 | 1998-11-25 | Interpump Group S.P.A. | Delivery lance with rotary nozzle |
DE10104191A1 (en) * | 2001-01-31 | 2002-08-01 | Anton Jaeger | Rotor jet for high pressure water cleaning system has at least one bypass aperture between inflow aperture and jet |
JP2004105790A (en) * | 2002-09-13 | 2004-04-08 | Toto Ltd | Water delivery device |
DE102004047586A1 (en) * | 2004-09-23 | 2006-04-06 | Alfred Kärcher Gmbh & Co. Kg | Cleaning head for purifier, has housing with which cleaning body is rigidly connected, and bobbin, arranged in interior, displaced from agent flowing through interior in motion, where housing is displaced with moving bobbin in oscillation |
EP1719557A1 (en) * | 2005-05-03 | 2006-11-08 | Hans Einhell AG | Rotary nozzle for cleaning device |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010136412A1 (en) * | 2009-05-25 | 2010-12-02 | Alfred Kärcher Gmbh & Co. Kg | Rotary nozzle for a high-pressure cleaning device |
CN102448616A (en) * | 2009-05-25 | 2012-05-09 | 阿尔弗雷德·凯驰两合公司 | Rotary nozzle for a high-pressure cleaning device |
US8820659B2 (en) | 2009-05-25 | 2014-09-02 | Alfred Kaercher Gmbh & Co. Kg | Rotor nozzle for a high-pressure cleaning appliance |
CN102448616B (en) * | 2009-05-25 | 2015-02-18 | 阿尔弗雷德·凯驰两合公司 | Rotary nozzle for a high-pressure cleaning device |
CN103920608A (en) * | 2013-01-10 | 2014-07-16 | 林文斌 | Aluminum oxide ceramic material and lubricating method applied to rotating nozzle |
EP3646953B1 (en) | 2018-11-05 | 2021-07-14 | P.A. S.p.A. | Rotary jet nozzle assembly for pressure cleaning devices |
Also Published As
Publication number | Publication date |
---|---|
EP2038067A1 (en) | 2009-03-25 |
EP2038067B1 (en) | 2017-11-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4330089A (en) | Adjustable massage shower head | |
CA2080696C (en) | Rotor nozzle for a high-pressure cleaning device | |
US5518181A (en) | Variable spray or variable pulse shower head | |
US5356077A (en) | Pulsating shower head | |
US6186414B1 (en) | Fluid delivery from a spray head having a moving nozzle | |
US5294054A (en) | Adjustable showerhead assemblies | |
US5598975A (en) | Rotor nozzle, especially for a high pressure cleaning apparatus | |
JP5166279B2 (en) | Device for spraying liquid | |
US6766967B2 (en) | Magnet-driven rotary nozzle | |
JP2608230B2 (en) | Fluid spray device | |
CN102029229B (en) | Shower head for a sanitary shower fitting | |
US6021539A (en) | Washing device | |
US6092739A (en) | Spray head with moving nozzle | |
US6193169B1 (en) | Rotating spray nozzle with controlled braking action | |
US7063274B2 (en) | Cleaning nozzle | |
RU2006130489A (en) | LIQUID SPRAY | |
US20120168538A1 (en) | Spin Annular Slit Spray Nozzle and Spray Apparatus Thereof | |
JPH0780361A (en) | Rotary nozzle | |
JPH0442068B2 (en) | ||
ITTO20000277A1 (en) | SHOWER HEAD COMPLEX | |
WO2008004030A1 (en) | Rotating nozzle | |
WO2002045864A8 (en) | Hero-turbine centrifuge with drainage enhancing baffle devices | |
US7237726B2 (en) | Paint sprayer gun | |
US4378195A (en) | Pressure fluid motor | |
EP2191756A1 (en) | Shower device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 06765965 Country of ref document: EP Kind code of ref document: A1 |
|
REEP | Request for entry into the european phase |
Ref document number: 2006765965 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006765965 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
NENP | Non-entry into the national phase |
Ref country code: RU |