EP4263063A1 - Rotary nozzle for a high-pressure cleaning device - Google Patents
Rotary nozzle for a high-pressure cleaning deviceInfo
- Publication number
- EP4263063A1 EP4263063A1 EP20837954.5A EP20837954A EP4263063A1 EP 4263063 A1 EP4263063 A1 EP 4263063A1 EP 20837954 A EP20837954 A EP 20837954A EP 4263063 A1 EP4263063 A1 EP 4263063A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- nozzle
- housing
- longitudinal axis
- rotor body
- 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.)
- Withdrawn
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 17
- -1 polypropylene Polymers 0.000 claims description 14
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 241000237942 Conidae Species 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 5
- 239000000945 filler Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 229940099514 low-density polyethylene Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect 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 that has at least one liquid inlet and one liquid outlet, and with a rotor that is arranged in an interior space of the housing and has a rotor body and a nozzle, the nozzle on a side facing the liquid outlet front end area of the rotor body and the rotor body has a through-channel which is followed by a nozzle channel of the nozzle, and wherein the rotor is supported on a pan-shaped, centrally perforated depression arranged upstream of the liquid outlet, the longitudinal axis of the rotor being inclined relative to the longitudinal axis of the housing and the rotor is caused to rotate by the liquid flowing through the housing, in which the longitudinal axis of the rotor rotates on a cone surface.
- Such a rotor nozzle is known, for example, from DE 40 13 446 CI and EP 0 762 941 B1. With their help, a compact jet of liquid can be generated that circulates on a cone surface and that can be directed onto a surface for cleaning purposes, for example.
- the at least one liquid inlet can be supplied with pressurized liquid, usually water, for example from a high-pressure cleaning device which is in flow connection with the at least one liquid inlet via a pressure line.
- the pressurized liquid can flow into the interior of the housing of the rotor nozzle via the at least one liquid inlet.
- a rotor which has a rotor body and a nozzle, is arranged in the interior.
- the nozzle is fixed to an end area of the rotor body facing the liquid outlet.
- the rotor body has a through-channel which is followed by a nozzle channel of the nozzle.
- the rotor rests on a recess located upstream of the liquid outlet.
- the depression is designed in the shape of a pan and has a hole in the middle, so that the through-channel of the rotor body and the nozzle channel of the nozzle can be discharged through the central opening of the recess and the liquid outlet.
- the longitudinal axis of the rotor is inclined to the longitudinal axis of the housing. The liquid that flows through the housing causes the rotor to rotate around the longitudinal axis of the housing, during which the longitudinal axis of the rotor rotates on a cone surface.
- the rotor revolving around the longitudinal axis of the housing means that the rotor nozzle emits a compact liquid jet revolving on a cone surface.
- the pressure of the liquid can be at least 80 bar, for example, preferably at least 100 bar. Such a jet of liquid results in a good cleaning effect.
- the rotational movement of the rotor around the longitudinal axis of the housing usually leads to an imbalance, which causes the rotor nozzle to vibrate, which are aligned perpendicularly to the longitudinal axis of the housing and are often perceived as annoying by the user.
- the rotor nozzle is subjected to a recoil force which, due to the rotor being oriented obliquely to the longitudinal axis of the housing, has a force component oriented perpendicularly to the longitudinal axis of the housing. This force component also causes vibrations in the rotor nozzle.
- EP 1 072 317 A2 and EP 3 646 953 A1 propose a compensating body which is diametrically opposite the rotor in relation to the longitudinal axis of the housing and is rigidly connected to the rotor.
- the compensating body opposite the rotor thus performs a revolving motion about the longitudinal axis of the housing together with the rotor.
- the vibrations caused by the rotation of the rotor can be minimized by means of the compensating body.
- the object of the present invention is therefore to further develop a rotor nozzle of the type mentioned at the outset in such a way that vibrations of the rotor nozzle that occur during operation can be minimized in a structurally simple manner.
- this object is achieved according to the invention in that the density of the rotor body is at most 1 g/cm 3 .
- the invention incorporates the idea that the imbalance caused by the rotor during its orbital movement can be reduced by the density of the rotor body being at most 1 g/cm 3 .
- the density of the rotor body is the quotient of the mass of the rotor body and the volume of the rotor body.
- the density of the rotor body is at most as high as the density of water, which is typically used as a liquid for cleaning a surface. It is known that the density of water is approximately 1 g/cm 3 .
- the nozzle causes a slight imbalance when the rotor rotates, although this is practically due to the low mass of the nozzle and the small distance between the center of gravity of the nozzle and the longitudinal axis of the housing is negligible.
- the rotor revolving around the longitudinal axis of the housing results in practically no imbalance, the effect of which could cause the rotor nozzle to vibrate. It has been shown that when using a rotor body with a maximum density of 1 g/cm 3 a user perceives practically no disruptive vibrations of the rotor nozzle.
- the density of the rotor body is less than 1 g/cm 3 . It has been shown that not only can an imbalance caused by the revolving rotor be avoided, but it can also be avoided Vibrations are compensated for, which are caused by the force component, which is aligned perpendicular to the longitudinal axis of the housing, of the recoil force caused by the liquid as it exits the nozzle. This results in a further reduction in vibrations of the rotor nozzle that are perceived as disturbing.
- the density of the rotor body is at most 0.97 g/cm 3 .
- the density of the rotor body is approximately 0.87 g/cm 3 to approximately 0.97 g/cm 3 .
- the volume of the rotor body minus the through-channel is at least 15% of the volume of the interior of the housing. It has been shown that vibrations of the rotor nozzle can be counteracted particularly effectively by the rotor body filling up at least 15% of the interior of the housing.
- the volume of the interior of the housing is about 40 cm 3 to about 50 cm 3 and that the volume of the rotor body minus the passage channel is about 8 cm 3 to about 9 cm 3 .
- the rotor body preferably consists of a plastic material, in particular a polypropylene and/or polyethylene material.
- the rotor body consists at least in areas, preferably completely, of a polypropylene material without fillers.
- the rotor body consists at least partially, preferably completely, of a polyethylene material, in particular a high-density polyethylene material, a linear low-density polyethylene material and/or a low- Density polyethylene material.
- the rotor body can be designed in several parts, ie it can consist of several components with different or the same density, the components being joined together and having a total density of at most 1 g/cm 3 in the assembled state.
- the rotor body is designed in one piece.
- the rotor body consists of a single component with a maximum density of 1 g/cm 3 .
- a rectifier is arranged in a section of the through-channel of the rotor body that faces away from the nozzle.
- Such rectifiers often have two walls which are perpendicular to one another, run parallel to the longitudinal axis of the rotor and penetrate diametrically through its passage channel.
- the density of the rectifier is at most 1 g/cm 3 .
- the density of the rectifier is at most 0.97 g/cm 3 .
- the rectifier consists of a plastic material, in particular of a polypropylene and/or polyethylene material.
- a nozzle through which the liquid is discharged is arranged on an end region of the rotor body facing the liquid outlet of the housing. It is favorable here if the nozzle consists of a ceramic material, a sintered metal or a hard metal, because such materials are particularly hard-wearing.
- the nozzle rotating together with the rotor body around the longitudinal axis of the housing contributes at most to a very small extent due to its low mass and due to the small distance that the center of gravity of the nozzle occupies to the longitudinal axis of the housing Contributes to vibrations that can be bothersome to the user.
- the nozzle can therefore consist of materials that are as wear-resistant as possible, even if their density is greater than 1 g/cm 3 .
- the at least one liquid inlet via which the liquid can flow into the interior of the housing, opens into an annular space which surrounds a projection in the circumferential direction that protrudes into the interior of the housing and is aligned coaxially with the longitudinal axis of the housing, with the rotor body immersed in the annular space with a rear end region facing away from the liquid outlet.
- the annular space forms a guide for the rotor body, so that it reliably maintains an orientation at an angle to the longitudinal axis of the housing.
- starting behavior of the rotor can be improved as a result.
- the start-up behavior is understood to mean the initiation of the rotational movement of the rotor around the longitudinal axis of the housing.
- the rotor Before pressurized liquid is supplied to the housing, the rotor is at rest relative to the inner wall of the housing, i.e. it is not yet rotating. If pressurized liquid is now supplied via the at least one liquid inlet, the rotor must first be set in a rotating motion about the longitudinal axis of the housing. It is advantageous here if the rotor is already aligned at an angle to the longitudinal axis of the housing.
- the only figure shows a schematic longitudinal section of an advantageous embodiment of a rotor nozzle according to the invention, which is denoted overall by the reference numeral 10 .
- the rotor nozzle 10 has a housing 12 with a first housing part 14 and a second housing part 16 surrounding an interior space 18 .
- the second housing part 16 is surrounded by a protective jacket 17 in the circumferential direction.
- the first housing part 14 is screwed into the second housing part 16 and has a stepped blind hole 20 with an internal thread 22.
- the first housing part 14 can be connected by means of the internal thread 22 to a jet pipe which is known per se and is therefore not shown in the drawing is in flow connection via a pressure hose with a high-pressure cleaning device, so that the rotor nozzle 10 can be supplied with liquid, preferably water, which has been pressurized by the high-pressure cleaning device.
- a plurality of tangential liquid inlets 24 of the first housing part 14 adjoin the blind hole 20 in the direction of flow of the liquid, via which the liquid can enter the interior space 18 . Because of the tangential orientation of the liquid inlets 24 , the liquid entering the interior 18 has a directional component that is oriented tangentially with respect to a longitudinal axis 26 of the housing 12 . As a result, liquid in the interior 18 is rotated about the longitudinal axis 26 of the housing 12 .
- the second housing part 16 has a front housing section 28 and a rear housing section 34 .
- the rear housing section 34 is integrally connected to the front housing section 28 and is designed essentially as a hollow cylinder.
- the end wall 30 of the front housing section 28 has a liquid outlet 36 which is aligned coaxially to the longitudinal axis 26 of the housing and which widens conically in the direction facing away from the interior space 18 .
- a bearing element 38 is arranged on the inside of the end wall 30 and has a pan-shaped depression 39 with a central opening 40 which is aligned coaxially with the liquid outlet 36 .
- the bearing element 38 is surrounded by a sealing ring 42 .
- the bearing element 38 is sealed off from the front housing section 28 by means of the sealing ring 42 .
- the first housing part 14 has a projection 44 which is aligned coaxially to the housing longitudinal axis 26 and protrudes into the interior space 18 and is surrounded by an annular space 46 in the circumferential direction.
- the liquid inlets 24 extend through a cylindrical section 48 of the projection 44.
- a truncated cone-shaped section 50 of the projection 44 adjoins the cylindrical section 48 in one piece.
- a rotor 52 is arranged in the interior 18 of the housing 12 .
- the rotor 52 has a rotor body 54 and a nozzle 56 .
- the nozzle 56 is fixed to a front end area 58 of the rotor body 54 facing the liquid outlet 36 .
- the rotor 52 has a longitudinal axis 60 which is inclined relative to the longitudinal axis 26 of the housing 12 and intersects the longitudinal axis 26 of the housing 12 in the area of the liquid outlet 36 .
- the rotor body 34 is penetrated by a passage channel 62 which is followed by a nozzle channel 64 of the nozzle 56 pressed into the front end region 58 of the rotor body 54 .
- rectifier 66 which has two walls 68, 70 which are perpendicular to one another, run parallel to the longitudinal axis 60 of the rotor 52 and penetrate the through-channel 62 diametrically.
- the rotor body 54 dips into the annular space 46 at the level of the frustoconical section 50 .
- the rotor body 54 has a frustoconical contact surface 74 which extends over its circumference and bears against an inner wall 76 of the second housing part 16 .
- liquid under pressure preferably water
- the liquid enters the interior space 18 via the tangential inlets 24 and can flow out of the interior space 18 via the through-channel 62 of the rotor body 54 , the nozzle channel 64 of the nozzle 56 and then via the central opening 40 of the bearing element 38 and the liquid outlet 36 .
- the interior space 18 is filled with liquid which is rotated about the longitudinal axis 26 of the housing 12 by the liquid flowing in via the tangential inlets 24 . A column of liquid rotating about the longitudinal axis 26 is thus formed within the interior space 18 .
- rotor 52 Under the influence of the rotating column of liquid, rotor 52, which is supported on bearing element 38 and whose longitudinal axis 60 is aligned obliquely with respect to longitudinal axis 26 of the housing, is set in rotation about longitudinal axis 26 of the housing, so that it performs an orbital movement about longitudinal axis 26 of the housing, with longitudinal axis 60 of the Rotor 52 rotates on a cone surface.
- This circulating movement is that the liquid flowing out of the liquid outlet 36 is discharged in the form of a compact jet of liquid circulating on a cone envelope. For cleaning purposes, for example, this jet of liquid can be directed onto a surface to be cleaned.
- the density of the rotor body 54 is a maximum of 1 g/cm 3 , that is, the density of the rotor body 54 has at most the same value as the density of the liquid typically used, namely the density of water.
- the rotor body 54 Since the rotor body 54 has practically the same density or even a slightly lower density than the liquid that is typically used, the rotational movement of the rotor 52 around the longitudinal axis 26 of the housing does not lead to any noticeable imbalance and thus also no noticeable vibrations of the rotor nozzle 10. In addition, A maximum density of the rotor body 54 of 1 g/cm 3 also keeps vibrations low, which are caused by the recoil force of the liquid flowing through the nozzle 56, which recoil is oriented obliquely to the longitudinal axis 26 of the housing.
- the rotor body preferably consists of a polypropylene or polyethylene material, in particular a polypropylene material without fillers.
- the rectifier 66 is also preferably made of a polypropylene or polyethylene material, in particular a polypropylene material without fillers.
- the nozzle 56 is made of a ceramic material, a sintered metal or a hard metal because this gives the nozzle 56 high wear resistance.
- the nozzle 56 can have a density of more than 1 g/cm 3 , but since it has only a small mass and the center of gravity of the nozzle is arranged at a small distance from the housing longitudinal axis 26, the influence of the nozzle 56 on vibrations of the rotor nozzle 10 is practical negligible.
Landscapes
- Nozzles (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2020/086536 WO2022128085A1 (en) | 2020-12-16 | 2020-12-16 | Rotary nozzle for a high-pressure cleaning device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4263063A1 true EP4263063A1 (en) | 2023-10-25 |
Family
ID=74130172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20837954.5A Withdrawn EP4263063A1 (en) | 2020-12-16 | 2020-12-16 | Rotary nozzle for a high-pressure cleaning device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4263063A1 (en) |
CN (1) | CN116367927A (en) |
WO (1) | WO2022128085A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4013446C1 (en) | 1990-04-27 | 1991-05-08 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | |
EP0762941B1 (en) | 1994-05-30 | 1998-08-19 | Alfred Kärcher GmbH & Co. | Rotary nozzle for high pressure cleaning appliances |
EP1072317A3 (en) | 1999-07-27 | 2002-07-03 | Wolfgang Suttner | Rotor nozzle for a high-pressure cleaning device and method for manufacturing a nozzle |
DE20121222U1 (en) * | 2001-11-07 | 2003-03-20 | Jäger, Anton, 89250 Senden | Rotor nozzle, especially for high pressure cleaners |
DE502005000330D1 (en) * | 2005-05-03 | 2007-03-08 | Einhell Hans Ag | Rotor nozzle for a cleaning device |
EP1920847B1 (en) * | 2006-11-09 | 2017-04-05 | Nilfisk A/S | Rotating nozzle for a high-pressure cleaning device |
WO2014023341A1 (en) * | 2012-08-07 | 2014-02-13 | Alfred Kärcher Gmbh & Co. Kg | Rotor nozzle for a high-pressure cleaning device |
US10040078B2 (en) * | 2015-11-25 | 2018-08-07 | Karl J. Fritze | Compact linear oscillating water jet |
ES2965058T3 (en) | 2018-11-05 | 2024-04-10 | P A S P A | Rotating jet nozzle assembly for pressure cleaning devices |
CN210474358U (en) * | 2019-08-12 | 2020-05-08 | 朱天骄 | High-speed jet rotatable nozzle |
-
2020
- 2020-12-16 CN CN202080106858.XA patent/CN116367927A/en active Pending
- 2020-12-16 EP EP20837954.5A patent/EP4263063A1/en not_active Withdrawn
- 2020-12-16 WO PCT/EP2020/086536 patent/WO2022128085A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2022128085A1 (en) | 2022-06-23 |
CN116367927A (en) | 2023-06-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0526508B1 (en) | Rotor nozzle for a high-pressure cleaning device | |
EP2435190B1 (en) | Rotary nozzle for a high-pressure cleaning device | |
EP0379654B1 (en) | Rotating nozzle for a high-pressure cleaning device | |
EP0301310B1 (en) | Axial piston machine of the plate or inclined axis type with distribution slots and pressure compensation canals | |
DE3419964C2 (en) | Spray head of a high pressure cleaning device | |
EP2543442A2 (en) | Spray nozzle and method for creating at least one rotating spray jet | |
DE102009056010A1 (en) | Vane pump | |
DE4428633A1 (en) | Fuel pump for supplying fuel to a vehicle engine | |
DE102006016531A1 (en) | Fuel pump consists of housing in which flywheel is located and rotates within together with groups of recesses above and below the flywheel and channel extending from flywheel | |
DE9108507U1 (en) | Rotor nozzle for a high-pressure cleaning device | |
DE3705436A1 (en) | ROTATING CONNECTION FOR FIXED LIFTING TUBE | |
EP2251091B1 (en) | Rotor nozzle | |
EP4263063A1 (en) | Rotary nozzle for a high-pressure cleaning device | |
DE2434397C2 (en) | Radial turbine | |
DE9420324U1 (en) | Air head | |
DE4419404C2 (en) | Rotor nozzle | |
DE3016211A1 (en) | SCREEN SEPARATOR FOR PAPER FABRIC | |
WO2016138928A1 (en) | Switchable nozzle arrangement | |
DE69416081T2 (en) | Rotating generator | |
EP0762941B1 (en) | Rotary nozzle for high pressure cleaning appliances | |
EP3892383B1 (en) | Rotor nozzle | |
EP3265247A1 (en) | Rotary nozzle for a high-pressure cleaning device | |
DE20019430U1 (en) | Rotor nozzle for a high pressure cleaning device | |
EP3892382A1 (en) | Rotor nozzle | |
DE202021102286U1 (en) | Hollow cone nozzle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20230523 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20240206 |