EP0762941A1 - Rotary nozzle for high pressure cleaning appliances - Google Patents
Rotary nozzle for high pressure cleaning appliancesInfo
- Publication number
- EP0762941A1 EP0762941A1 EP94918819A EP94918819A EP0762941A1 EP 0762941 A1 EP0762941 A1 EP 0762941A1 EP 94918819 A EP94918819 A EP 94918819A EP 94918819 A EP94918819 A EP 94918819A EP 0762941 A1 EP0762941 A1 EP 0762941A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle body
- nozzle
- housing
- longitudinal axis
- rectifier
- 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
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 10
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 241000237942 Conidae Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 208000031872 Body Remains Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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 invention relates to a rotor nozzle for a high-pressure cleaning device with a housing which is provided in a front wall with a pan-shaped, centrally perforated depression, with a nozzle body having a through-bore and which has a spherical end in the pan-shaped depression ab ⁇ supports, extends in the longitudinal direction over a part of the housing and has an outer diameter which is smaller than the inner diameter of the housing, and with an inlet opening into the housing in one direction for the liquid through which the liquid in the housing around the
- the longitudinal axis can be set in rotation so that the nozzle body rotates together with the rotating liquid and thereby lies against the inner wall of the housing with a bearing surface, the longitudinal axis of the nozzle body being inclined with respect to the longitudinal axis of the housing.
- Such a rotor nozzle is known for example from DE 40 13 446 Cl. It has proven to be a very effective cleaning nozzle, since this nozzle can be used to generate a compact jet running around a cone jacket, with which a larger area can be achieved, the properties of the compact jet nevertheless being retained. This is also achieved with another known rotor nozzle, which, however, has a different drive principle, since in this known rotor nozzle the nozzle body is driven by a turbine or a paddle wheel (EP 0 379 654 B1).
- a rotor nozzle of the type described in the introduction in that the length of the through-bore in the nozzle body is at least 70 mm, in that the ratio of the length of the through-bore to its diameter has the value 17 or a greater value and that in the upstream section of the through hole, a rectifier with axially parallel and diametrically extending walls is arranged in the through hole, the length of which is at least 0.25 the length of the through hole.
- the relative speed between the circulating liquid on the one hand and the circulating nozzle body on the other hand at the inlet of the nozzle body is low, so that in this area only minor flow disturbances when the liquid enters the nozzle body be occurring.
- These remaining slight flow disturbances can be eliminated by the special dimensioning of the through-hole and the rectifier to such an extent that a cleaning effect which was previously unattainable with known rotor nozzles can be achieved. It is advantageous if the diameter of the through hole is the same throughout, with the exception of the outlet area, that is, if there are no steps or constrictions in the through hole.
- the through hole in the outlet area will merge into the outlet opening of an outlet nozzle, and this outlet opening usually has a much smaller diameter than the through hole. It is also advantageous here if the transition from the through hole into the outlet opening of the nozzle takes place continuously, as is known per se.
- the thickness of the walls of the rectifier is at most 1/40 of the total length of the rectifier. This is a very thin wall, which means that the flow through the through hole through the walls is minimally disturbed. This also promotes the uniformity of the flow through the through hole considerably.
- the rectifier is made of metal, since the higher strength values of metal compared to plastic mean that it is possible to work with smaller wall thicknesses without fear of damage to the rectifier and thus a change in the rectifier geometry .
- the width of the walls of the rectifier corresponds over most of its length to the inside diameter of the through hole, that the walls at the upstream end of the rectifier are slightly widened and that the widened parts of the walls merge into one Penetrate insert from deformable material that forms the inner wall at the upstream end of the through hole. It is thereby possible to fix the rectifier by axially inserting it into the through hole, since the widened ends of the rectifier dig into the deformable material and thus fix the rectifier in this position. At the same time, the walls bear most of their length against the inner wall of the through hole and thus divide the through hole into axially parallel and completely separate channels, which lead to the calming of the liquid.
- a plastic ring which forms the deformable material is inserted into an enlarged section at the upstream end of the through-bore.
- a nozzle insert with an outlet opening is arranged at the downstream end of the through bore, the outlet direction of which is inclined with respect to the longitudinal axis of the nozzle body.
- the compact jet is no longer emitted from the nozzle body in the direction of the longitudinal axis of the nozzle body, but is inclined obliquely to this longitudinal direction, that is to say at an angle to this longitudinal direction.
- This longitudinal direction of the nozzle body at the same time forms the axis of rotation about which the nozzle body can rotate in the housing, so that this direction of the outlet opening also rotates on a cone shell, namely a cone shell, due to this intrinsic rotation of the nozzle body about its own longitudinal axis. whose axis coincides with the longitudinal axis of the nozzle body.
- a complicated superimposition movement of the emitted compact jet is obtained in this way, namely, it first rotates according to the conical orbit of the nozzle body on a cone surface, and according to the intrinsic rotation of the nozzle body about its own longitudinal axis, this is superimposed Once again a conical orbit of the jet, this time in the extension of the longitudinal direction of the nozzle body itself.
- a very compact jet is formed by the upstream connection of the specially dimensioned through hole, which is deflected by the outlet opening with respect to the longitudinal axis of the nozzle body and at the same time retains its compact nature to the full extent .
- a very compact jet thus runs around a superimposed conical surface, and this means that when this compact jet strikes a surface, a circular strip is cleaned very effectively, since practically every point on the circular strip is struck by the very compact jet.
- the inclination of the outlet opening with respect to the longitudinal axis of the nozzle body is slight, for example in the range from 0.5 ° to 10 °, preferably from 1 ° to 5 ° and very preferably in the range between 2 ° and 3 , 5 °.
- a relatively slight inclination of the outlet opening relative to the axis of rotation of the nozzle body is therefore sufficient to achieve the desired effect.
- the nozzle body receives a nozzle insert in which an outlet opening is arranged which is inclined with respect to the longitudinal axis of the nozzle insert which is fitted axially parallel to the nozzle body.
- the nozzle body receives a nozzle insert with an outlet opening arranged axially parallel in the nozzle insert and that the nozzle insert in the nozzle body is arranged with its own axis inclined with respect to its longitudinal axis.
- the nozzle insert itself is therefore already manufactured with an outlet opening inclined with respect to the longitudinal axis of the nozzle insert, or a conventional nozzle insert with an axis-parallel outlet opening is inserted obliquely into the nozzle body.
- Figure 1 is a longitudinal sectional view of a rotor nozzle
- Figure 2 is a sectional view taken along line 2-2 in Figure 1;
- FIG. 3 shows an enlarged partial view of the outlet area of the rotor nozzle of FIG. 1 in a modified exemplary embodiment with a nozzle insert with an inclined outlet opening and
- FIG. 4 a view similar to FIG. 3 in a further preferred exemplary embodiment with a nozzle insert with an axially parallel outlet opening which is inserted obliquely into the nozzle body.
- the rotor nozzle shown in the drawing comprises a central screw connection 1, into which a high-pressure line (not shown in the drawing) can be screwed, through which cleaning fluid is supplied under high pressure.
- the screw connection 1 opens into a central blind bore 2 which is connected to the interior 4 of a housing 5 of the rotor nozzle via tangential bores 3 which run essentially transversely to the longitudinal direction of the blind bore 2.
- This housing 5 is formed by a hood-shaped housing cap 6, which is screwed onto an external thread 7 of a screw part 1 and the bottom part 8 receiving the blind hole 2. Housing cap 6 and base part 8 are sealed from the outside by an interposed ring seal 9.
- the base part 8 has a central projection 10 directed towards the interior 4, which between it and the inner wall of the interior 4 forms an annular space 11 coaxially surrounding the blind bore 2, into which the bores 3 open in such a way that the bores 3 liquid entering the annular space 11 is accelerated in the circumferential direction in the annular space 11. This results from the laterally offset arrangement of the bores 3, through which a component running tangentially to the circumferential direction is introduced into the flow.
- the side wall 12 of the projection 10 which delimits the annular space 11 on the inside has an annular shoulder 13 on which the side wall 12 springs back in the radial direction in the direction of the interior 4.
- the interior 4 is cylindrical in the area adjoining the base part 8 and then merges into a conically narrowing section 14, which is finally closed by an end wall 15.
- this end wall 15 there is a central opening 16 which widens in steps towards the interior 4.
- a bearing body 18 is inserted, which can be made of ceramic, for example, and is sealed against the housing cap 6 by means of an annular seal 19.
- this ring-shaped bearing body 18, which is arranged concentrically to the opening 16 is designed in the form of a spherically shaped pan, into which the spherical head 20 of a component which is referred to as the nozzle body 21 is inserted.
- This nozzle body 21 essentially comprises a tube 22, with a constant outer and inner diameter, into which a nozzle insert 23 is inserted at the end on the bearing body side, which insert can also be made of ceramic, for example.
- This nozzle insert 23 is spherically shaped at its outer end protruding from the tube 22 and thus forms the head 20.
- this nozzle insert 23 there is an outlet opening 24, the diameter of which is considerably smaller than the inside diameter of the tube 22.
- a rolling element 25 with a cross-section is attached to the tube, which can be made of polyurethane, for example, which is set relatively soft and which has a high friction with respect to the inner wall of the housing cap 6.
- This rolling element 25 is supported on an annular shoulder 26 on the outer wall of the tube 22 and is thereby fixed in one direction in the axial direction.
- the end of the tube 22 facing away from the bearing body 18 dips into the annular space 11 and keeps a small distance from the shoulder 13 which is so small that the nozzle body 21 in the housing can only be displaced in the axial direction by a very small distance and thus cannot exit with its head 20 from the bearing in the bearing body 18.
- a plastic ring 28 which consists of a relatively soft, deformable plastic, is inserted into a step-shaped extension 27 at the rear end of the tube 22 opposite the bearing body 18.
- a rectifier 30 is inserted into the through bore 29 of the tube 22 and, in the exemplary embodiment shown, has two walls 31 which are perpendicular to one another and run parallel to the through bore 29 and penetrate them diametrically.
- the width of these walls 31 is the same as the inside diameter of the through hole 29 over most of the length of the rectifier 30, so that axially parallel channels which are completely separate from one another are formed between each two walls 31.
- the width of the walls 31 increases, so that the walls dig into the plastic ring 28 in this region of greater width when the rectifier 30 is inserted into the through bore 29 in the axial direction.
- This digging fixes the rectifier 30 in the through hole 29.
- the through hole 29 has the same inner diameter throughout, so that no steps or constrictions occur, except, of course, in the area of the nozzle opening 24.
- the length L of the through hole 29 is at least 70 mm, and the diameter d of the through hole 29 is chosen so small that the ratio Length L / diameter d assumes the value 17 or is greater.
- the length 1 of the rectifier 30 in the axial direction corresponds to at least 0.25 the length L of the through hole 29.
- the rectifier 30 has particularly thin walls, namely the maximum thickness of the walls 31 is 1/40 of the length 1 of the rectifier.
- the rectifier 30 is preferably made of metal.
- the cleaning liquid supplied generates a rotational flow in the interior 4, in which the liquid inside the housing 5 rotates about the longitudinal axis of the housing. It takes along the nozzle body 21, which rests with the rolling body 25 on the inner wall of the housing 5 and rolls on it. As a result, the nozzle body 21 moves in the interior of the housing 5 on a cone shell, so that a compact cleaning jet emerging from the outlet opening 24 in the direction of the through bore 29 also rotates on a cone shell.
- This compact cleaning jet is particularly turbulence-free and compact due to the dimensions specified and is therefore particularly suitable for cleaning purposes. While in the exemplary embodiment in FIG.
- the nozzle insert 23 has an outlet opening, the outlet direction of which lies exactly on the longitudinal axis of the nozzle body 21, so that the jet is emitted from the nozzle body exactly in the direction of the longitudinal axis of the nozzle body, the outlet direction is Outlet opening 24 in the embodiments according to FIGS. 3 and 4 is inclined with respect to the longitudinal axis of the nozzle body 21. This angle of inclination is on the order of 0.5 ° to 10 °, preferably a few degrees. As in the exemplary embodiment shown in FIG.
- the nozzle body 21 is inclined relative to the longitudinal axis of the housing of the rotor nozzle by an angle which results from the fact that the nozzle body 21 rests with a rolling body 25 on the inner wall of the interior 4.
- the longitudinal axis of the nozzle body thus runs on a conical surface around the longitudinal axis.
- the axis of the outlet opening 24 and thus the direction of the emerging jet in turn run around the longitudinal axis of the nozzle body 21 on a cone jacket.
Landscapes
- Nozzles (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT94918819T ATE169845T1 (en) | 1994-05-30 | 1994-05-30 | ROTOR NOZZLE FOR A HIGH PRESSURE CLEANING DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1994/001755 WO1995032804A1 (en) | 1994-05-30 | 1994-05-30 | Rotary nozzle for high pressure cleaning appliances |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0762941A1 true EP0762941A1 (en) | 1997-03-19 |
EP0762941B1 EP0762941B1 (en) | 1998-08-19 |
Family
ID=8165860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94918819A Expired - Lifetime EP0762941B1 (en) | 1994-05-30 | 1994-05-30 | Rotary nozzle for high pressure cleaning appliances |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0762941B1 (en) |
DE (1) | DE59406749D1 (en) |
DK (1) | DK0762941T3 (en) |
WO (1) | WO1995032804A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19833261C2 (en) * | 1998-07-23 | 2001-05-17 | Anton Jaeger | Rotor nozzle |
ATE516084T1 (en) * | 2001-01-05 | 2011-07-15 | Toto Ltd | WATER DISCHARGE DEVICE |
DE102009023647A1 (en) | 2009-05-25 | 2010-12-02 | Alfred Kärcher Gmbh & Co. Kg | Rotor nozzle for a high-pressure cleaning device |
DE102012111797B4 (en) | 2012-12-05 | 2017-04-20 | Reinhard Caliebe | Machining device for a workpiece |
EP4263063A1 (en) | 2020-12-16 | 2023-10-25 | Alfred Kärcher SE & Co. KG | Rotary nozzle for a high-pressure cleaning device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3902478C1 (en) * | 1989-01-27 | 1990-07-19 | Josef 7918 Illertissen De Kraenzle | |
DE4013446C1 (en) * | 1990-04-27 | 1991-05-08 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | |
IT1243658B (en) * | 1990-10-18 | 1994-06-16 | Interpump | DEVICE FOR EMITTING A LIQUID JET WITH ROTATING AXIS ON A CONICAL SURFACE. |
-
1994
- 1994-05-30 WO PCT/EP1994/001755 patent/WO1995032804A1/en active IP Right Grant
- 1994-05-30 DE DE59406749T patent/DE59406749D1/en not_active Expired - Lifetime
- 1994-05-30 EP EP94918819A patent/EP0762941B1/en not_active Expired - Lifetime
- 1994-05-30 DK DK94918819T patent/DK0762941T3/en active
Non-Patent Citations (1)
Title |
---|
See references of WO9532804A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1995032804A1 (en) | 1995-12-07 |
EP0762941B1 (en) | 1998-08-19 |
DE59406749D1 (en) | 1998-09-24 |
DK0762941T3 (en) | 1998-11-16 |
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