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EP0865828A2 - Nozzle head with a nozzle holder which is mounted on a bearing and rotatable about a longitudinal axis - Google Patents

Nozzle head with a nozzle holder which is mounted on a bearing and rotatable about a longitudinal axis Download PDF

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Publication number
EP0865828A2
EP0865828A2 EP98100757A EP98100757A EP0865828A2 EP 0865828 A2 EP0865828 A2 EP 0865828A2 EP 98100757 A EP98100757 A EP 98100757A EP 98100757 A EP98100757 A EP 98100757A EP 0865828 A2 EP0865828 A2 EP 0865828A2
Authority
EP
European Patent Office
Prior art keywords
nozzle head
head according
sealing
hollow shaft
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98100757A
Other languages
German (de)
French (fr)
Other versions
EP0865828A3 (en
Inventor
Hermann Frye-Hammelmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paul Hammelmann Maschinenfabrik GmbH
Original Assignee
Paul Hammelmann Maschinenfabrik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Paul Hammelmann Maschinenfabrik GmbH filed Critical Paul Hammelmann Maschinenfabrik GmbH
Publication of EP0865828A2 publication Critical patent/EP0865828A2/en
Publication of EP0865828A3 publication Critical patent/EP0865828A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/003—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with braking means, e.g. friction rings designed to provide a substantially constant revolution speed
    • B05B3/006—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with braking means, e.g. friction rings designed to provide a substantially constant revolution speed using induced currents; using magnetic means
    • 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
    • B05B3/025—Rotational joints
    • B05B3/026—Rotational joints the fluid passing axially from one joint element to another
    • 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
    • B05B3/06—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 by jet reaction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/19—Nozzle materials

Definitions

  • the invention relates to a nozzle head with a around a longitudinal axis rotatably mounted, drivable nozzle holder and with a fixed one Housing with pressurized water connection, one in the housing on the nozzle holder attached hollow shaft is rotatably supported, through the central channel Pressurized water can be fed to the spray nozzles of the nozzle carrier.
  • a nozzle head of this type is known (DE 38 27 251 A1), in which the pressurized water through an extended borehole starting from the pressurized water connection the hollow shaft extending insert sleeve the spray nozzles of the nozzle carrier is fed.
  • a labyrinth gap seal Between the insertion sleeve and the boundary surface of the enlarged bore of the hollow shaft is a labyrinth gap seal with the annular gap provided on one side expanding, arranged in the one-piece sleeve ring grooves.
  • this labyrinth gap seal flows between the insert sleeve and the hollow shaft Leakage water, i.e. a subset of the pressure medium, that of a chamber is received, which extends radially outwards Drain holes is equipped.
  • the insert sleeve is a wearing part that from time to time Time needs to be changed.
  • the invention has for its object a seal between the rotating Parts of a nozzle head and the stationary parts so that leakage water flowing to the outside is avoided and wear resistance is significantly increased.
  • This object is achieved in that on the nozzle holder facing away from the end of the hollow shaft a provided with a central channel supporting the end face of the hollow shaft, made of a highly wear-resistant material existing sealing washer arranged and by a bracket on the Hollow shaft is fixed, and that the face facing the pressurized water connection the sealing disc that rotates during operation with the nozzle carrier and the hollow shaft on a sealing washer made of a highly wear-resistant material supports, which is taken up by a bracket fixed in the stationary housing becomes.
  • the sealing washers can be made of a ceramic material or of a high-strength and wear-resistant bearing material.
  • the collaborators End faces of the sealing washers are precision machined, preferably polished, so that the friction between these disks is low and also an escape of Leakage water is largely avoided.
  • the seal according to the invention can be in a working area of the pressure medium between 1,000 bar and 3,500 bar can be used.
  • the nozzle head 1 has a stationary, cylindrical housing 2, which with a Pressurized water connection 3 is provided.
  • the casing is covered by the Pressurized water connection 3 formed in one piece housing part 4, which with the housing part 5 is screwed and by a carrier body 6, which is fixed to the housing part 5 is.
  • the stationary housing 2 is provided with a central channel 7 Hollow shaft 8 rotatably supported and is supported on rolling bearings via an annular flange 9 10, 11 and 12, which are arranged in the central housing part 5.
  • the hollow shaft 8 is on the side facing away from the pressurized water connection 3 connected to a nozzle carrier 13 in which spray nozzles 14 are fixed.
  • This Spray nozzles are fixed with their longitudinal axes inclined to the axis of rotation 15, so that by the recoil of the pressurized water emerging from the nozzles Nozzle carrier 13 driven and its rotational movement by means of a brake must be braked.
  • This brake is arranged in the sleeve-shaped carrier body 6 and has one Copper ring 16, which surrounds permanent magnets 17 at a distance Ring body 18 are attached.
  • the permanent magnets and the copper ring form one Eddy current brake, by means of which the rotational movement of the nozzle carrier 13 is braked becomes.
  • a sealing washer 19 which consists of a highly wear-resistant material, arranged and fixed by a bracket 20 to the hollow shaft 8.
  • a threaded piece 21 provided with an internal thread, which on an external thread 22 of the hollow shaft 8 is screwed.
  • a sealing ring 23 Made of rubber or plastic, which is arranged in a receptacle of the hollow shaft and encompasses the central channel in the hollow shaft.
  • the sealing washer 19 is equipped with a central channel 24 which is connected to the adjacent central one Channel of the hollow shaft 8 is aligned.
  • a sealing washer 25 which is also made of a highly wear-resistant material is manufactured and which is received by a holder 26 which is in the housing part 4 is set.
  • a sealing ring 27 is used, which clamps clamped in the fixed housing part 14 is.
  • the sealing washers 19 and 25 can be made of a ceramic material or be made from a high-strength, wear-resistant bearing material.
  • the brackets 20 and 26, which receive the sealing washers 19 and 25, can be made of steel exist and are cylindrical in the illustrated embodiment.
  • the cooperating end faces of the sealing washers 19 and 25 are precision machined and preferably polished.
  • the longitudinal axes are the central ones Channels 24 and 28 of the sealing washers 19 and 25 slightly offset from each other.
  • the offset is e.g. approx. 1 mm. Practice has shown that this Wear behavior of the sealing washers 19.25 is improved.
  • the end face of the sealing disk 25 is in the nozzle head 1 according to FIG. 1 the side facing the pressurized water connection 3 is convex and the associated one Sealing surface of a support body 29 is concavely curved.
  • the support body has a central stepped channel 30 and is the housing part 4 slidably supported with a small stroke.
  • the pressure water connection 3 facing Pressurized water is applied to the end face 31, so that the support body 29 with the force generated thereby on the convex surface of the sealing washer 25 is pressed.
  • the effective, pressure-loaded end face 31 of the support body 29 is outward limited by a sealing ring 32 provided in a housing receptacle. Between the support body 29 and the sealing washer 25 is a central channel 30 of the support body 29 encompassing sealing ring 33 made of rubber or plastic in one Recording the support body 29 arranged.
  • the spray nozzles in the nozzle holder are arranged such that the pressurized water emerging from the spray nozzles drives the nozzle carrier due to the recoil, there is also the possibility to drive the nozzle head via a motor that is integrated into the nozzle head construction is.

Landscapes

  • Nozzles (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The jet arrangement consists of a cylindrical housing (2,4) which has a connection (3) for the water supply at one end and a head (13), in which the jet (14) is mounted, at the other end. A hollow shaft (8), which is mounted on ball bearings (11,12) in the housing, is attached to the head A sealing disc (19) is connected to the end of the hollow shaft with a ring-nut (20). This disc is made from a wear resistant material, e.g. ceramic, and rotates with the jet. The side of the disc nearest the water inlet lies against a fixed sealing disc (25) which is also made from a wear resistant material. This disc is mounted in the housing.

Description

Die Erfindung bezieht sich auf einen Düsenkopf mit einem um eine Längsachse drehbar gelagerten, antreibbaren Düsenträger und mit einem ortsfesten, einen Druckwasseranschluß aufweisenden Gehäuse, wobei im Gehäuse eine am Düsenträger befestigte Hohlwelle drehbar gelagert ist, durch deren mittigen Kanal das Druckwasser den Spritzdüsen des Düsenträgers zuführbar ist.The invention relates to a nozzle head with a around a longitudinal axis rotatably mounted, drivable nozzle holder and with a fixed one Housing with pressurized water connection, one in the housing on the nozzle holder attached hollow shaft is rotatably supported, through the central channel Pressurized water can be fed to the spray nozzles of the nozzle carrier.

Es ist ein Düsenkopf dieser Art bekannt (DE 38 27 251 A1), bei dem das Druckwasser durch eine von dem Druckwasseranschluß ausgehende, in eine erweiterte Bohrung der Hohlwelle sich erstreckende Einsteckhülse den Spritzdüsen des Düsenträgers zugeführt wird. Zwischen der Einsteckhülse und der Begrenzungsfläche der erweiterten Bohrung der Hohlwelle ist eine Labyrinthspaltdichtung mit den Ringspalt einseitig erweiternden, in der Einstückhülse angeordneten Ringnuten vorgesehen. Trotz dieser Labyrinthspaltdichtung fließt zwischen der Einsteckhülse und der Hohlwelle Leckagewasser, also eine Teilmenge des Druckmediums, das bzw. die von einer Kammer aufgenommen wird, die mit radial nach außen sich erstreckenden Ablaufbohrungen ausgerüstet ist. A nozzle head of this type is known (DE 38 27 251 A1), in which the pressurized water through an extended borehole starting from the pressurized water connection the hollow shaft extending insert sleeve the spray nozzles of the nozzle carrier is fed. Between the insertion sleeve and the boundary surface of the enlarged bore of the hollow shaft is a labyrinth gap seal with the annular gap provided on one side expanding, arranged in the one-piece sleeve ring grooves. Despite this labyrinth gap seal flows between the insert sleeve and the hollow shaft Leakage water, i.e. a subset of the pressure medium, that of a chamber is received, which extends radially outwards Drain holes is equipped.

Bei diesem Düsenkopf stellt die Einsteckhülse ein Verschleißteil dar, das von Zeit zu Zeit ausgewechselt werden muß.With this nozzle head, the insert sleeve is a wearing part that from time to time Time needs to be changed.

Der Erfindung liegt die Aufgabe zugrunde, eine Abdichtung zwischen den sich drehenden Teilen eines Düsenkopfes und den ortsfesten Teilen so zu gestalten, daß nach außen abfließendes Leckagewasser vermieden und die Verschleißfestigkeit wesentlich erhöht wird.The invention has for its object a seal between the rotating Parts of a nozzle head and the stationary parts so that leakage water flowing to the outside is avoided and wear resistance is significantly increased.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß an dem dem Düsenträger abgewandten Ende der Hohlwelle eine mit einem mittigen Kanal versehene, sich an der Stirnfläche der Hohlwelle abstützende, aus einem hochverschleißfesten Werkstoff bestehende Dichtungsscheibe angeordnet und durch eine Halterung an der Hohlwelle festgelegt ist, und daß die dem Druckwasseranschluß zugewandte Stirnfläche der im Betrieb mit dem Düsenträger und der Hohlwelle drehbaren Dichtungsscheibe sich an einer Dichtungsscheibe aus einem hochverschleißfesten Werkstoff abstützt, die von einer im ortsfesten Gehäuse festgelegten Halterung aufgenommen wird.This object is achieved in that on the nozzle holder facing away from the end of the hollow shaft a provided with a central channel supporting the end face of the hollow shaft, made of a highly wear-resistant material existing sealing washer arranged and by a bracket on the Hollow shaft is fixed, and that the face facing the pressurized water connection the sealing disc that rotates during operation with the nozzle carrier and the hollow shaft on a sealing washer made of a highly wear-resistant material supports, which is taken up by a bracket fixed in the stationary housing becomes.

Die Dichtungsscheiben können aus einem keramischen Werkstoff oder aus einem hochfesten und verschleißfesten Lagerwerkstoff bestehen. Die zusammenarbeitenden Stirnflächen der Dichtungsscheiben sind feinstbearbeitet, vorzugsweise poliert, so daß die Reibung zwischen diesen Scheiben gering ist und auch ein Austritt von Leckagewasser weitgehend vermieden wird.The sealing washers can be made of a ceramic material or of a high-strength and wear-resistant bearing material. The collaborators End faces of the sealing washers are precision machined, preferably polished, so that the friction between these disks is low and also an escape of Leakage water is largely avoided.

Die erfindungsgemäße Abdichtung kann in einem Arbeitsbereich des Druckmediums zwischen 1.000 bar und 3.500 bar eingesetzt werden.The seal according to the invention can be in a working area of the pressure medium between 1,000 bar and 3,500 bar can be used.

Weitere Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung eines Ausführungsbeispiels, das in den Figuren dargestellt ist.Further refinements of the invention result from the subclaims and the following description of an embodiment shown in the figures is.

Es zeigen:

  • Figur 1 einen Düsenkopf im Längsschnitt und
  • Figur 2 eine Ansicht in Richtung des Pfeiles II in Fig. 1.
    • Show it:
  • Figure 1 shows a nozzle head in longitudinal section and
  • Figure 2 is a view in the direction of arrow II in Fig. 1st

    • Der Düsenkopf 1 weist ein ortsfestes, zylinderförmiges Gehäuse 2 auf, das mit einem Druckwasseranschluß 3 versehen ist. Der Gehäusemantel wird durch das mit dem Druckwasseranschluß 3 einstückige Gehäuseteil 4 gebildet, das mit dem Gehäuseteil 5 verschraubt ist und durch einen Trägerkörper 6, der an dem Gehäuseteil 5 festgelegt ist. In dem ortsfesten Gehäuse 2 ist eine mit einem mittigen Kanal 7 versehene Hohlwelle 8 drehbar gelagert und stützt sich über einen Ringflansch 9 an Wälzlagern 10,11 und 12 ab, die in dem mittigen Gehäuseteil 5 angeordnet sind.The nozzle head 1 has a stationary, cylindrical housing 2, which with a Pressurized water connection 3 is provided. The casing is covered by the Pressurized water connection 3 formed in one piece housing part 4, which with the housing part 5 is screwed and by a carrier body 6, which is fixed to the housing part 5 is. In the stationary housing 2 is provided with a central channel 7 Hollow shaft 8 rotatably supported and is supported on rolling bearings via an annular flange 9 10, 11 and 12, which are arranged in the central housing part 5.

    Die Hohlwelle 8 ist an der dem Druckwasseranschluß 3 abgewandten Seite mit einem Düsenträger 13 verbunden, in dem Spritzdüsen 14 festgelegt sind. Diese Spritzdüsen sind mit ihren Längsachsen geneigt zur Rotationsachse 15 festgelegt, so daß durch den Rückstoß des aus den Düsen austretenden Druckwassers der Düsenträger 13 angetrieben und seine Rotationsbewegung mittels einer Bremse abgebremst werden muß.The hollow shaft 8 is on the side facing away from the pressurized water connection 3 connected to a nozzle carrier 13 in which spray nozzles 14 are fixed. This Spray nozzles are fixed with their longitudinal axes inclined to the axis of rotation 15, so that by the recoil of the pressurized water emerging from the nozzles Nozzle carrier 13 driven and its rotational movement by means of a brake must be braked.

    Diese Bremse ist in dem hülsenförmigen Trägerkörper 6 angeordnet und weist einen Kupferring 16 auf, der mit Abstand Permanentmagnete 17 umschließt, die an einem Ringkörper 18 befestigt sind. Die Permanentmagnete und der Kupferring bilden eine Wirbelstrombremse, durch die die Drehbewegung des Düsenträgers 13 abgebremst wird.This brake is arranged in the sleeve-shaped carrier body 6 and has one Copper ring 16, which surrounds permanent magnets 17 at a distance Ring body 18 are attached. The permanent magnets and the copper ring form one Eddy current brake, by means of which the rotational movement of the nozzle carrier 13 is braked becomes.

    An dem dem Düsenträger 13 abgewandten Ende der Hohlwelle 8 ist eine Dichtungsscheibe 19, die aus einem hochverschleißfesten Werkstoff besteht, angeordnet und durch eine Halterung 20 an der Hohlwelle 8 festgelegt. Zur Festlegung weist die Halterung 20 ein mit einem Innengewinde versehenes Gewindestück 21 auf, das auf ein Außengewinde 22 der Hohlwelle 8 geschraubt ist. Zwischen der Dichtungsscheibe 19 und der zugeordneten Stirnfläche der Hohlwelle 8 ist ein Dichtungsring 23 aus Gummi oder Kunststoff vorgesehen, der in einer Aufnahme der Hohlwelle angeordnet ist und den mittigen Kanal in der Hohlwelle umgreift. Die Dichtungsscheibe 19 ist mit einem mittigen Kanal 24 ausgerüstet, der mit dem benachbarten mittigen Kanal der Hohlwelle 8 fluchtet.At the end of the hollow shaft 8 facing away from the nozzle carrier 13 there is a sealing washer 19, which consists of a highly wear-resistant material, arranged and fixed by a bracket 20 to the hollow shaft 8. To determine the Bracket 20 a threaded piece 21 provided with an internal thread, which on an external thread 22 of the hollow shaft 8 is screwed. Between the sealing washer 19 and the associated end face of the hollow shaft 8 is a sealing ring 23 Made of rubber or plastic, which is arranged in a receptacle of the hollow shaft and encompasses the central channel in the hollow shaft. The sealing washer 19 is equipped with a central channel 24 which is connected to the adjacent central one Channel of the hollow shaft 8 is aligned.

    Die dem Druckwasseranschluß 3 zugewandten Stirnfläche der im Betrieb mit dem Düsenträger 13 und der Hohlwelle 8 drehbaren Dichtungsscheibe 19 stützt sich an einer Dichtungsscheibe 25 ab, die ebenfalls aus einem hochverschleißfesten Werkstoff gefertigt ist und die von einer Halterung 26 aufgenommen wird, die im Gehäuseteil 4 festgelegt ist. Zur Festlegung wird in dem dargestellten Ausführungsbeispiel ein Dichtungsring 27 benutzt, der in dem ortsfesten Gehäuseteil 14 klemmend verspannt ist.The face of the pressurized water connection 3 facing the in operation with the Nozzle carrier 13 and the hollow shaft 8 rotatable sealing disk 19 is supported from a sealing washer 25, which is also made of a highly wear-resistant material is manufactured and which is received by a holder 26 which is in the housing part 4 is set. In the illustrated embodiment, the determination is made a sealing ring 27 is used, which clamps clamped in the fixed housing part 14 is.

    Die Dichtungsscheiben 19 und 25 können aus einem keramischen Werkstoff oder aus einem hochfesten, verschleißfesten Lagerwerkstoff gefertigt sein. Die Halterungen 20 und 26, die die Dichtungsscheiben 19 und 25 aufnehmen, können aus Stahl bestehen und sind in dem aufgezeigten Ausführungsbeispiel zylindrisch ausgebildet.The sealing washers 19 and 25 can be made of a ceramic material or be made from a high-strength, wear-resistant bearing material. The brackets 20 and 26, which receive the sealing washers 19 and 25, can be made of steel exist and are cylindrical in the illustrated embodiment.

    Die zusammenwirkenden Stirnflächen der Dichtungsscheiben 19 und 25 sind feinstbearbeitet und vorzugsweise poliert.The cooperating end faces of the sealing washers 19 and 25 are precision machined and preferably polished.

    In dem Ausführungsbeispiel nach der Fig. 1 sind die Längsachsen der mittigen Kanäle 24 und 28 der Dichtungsscheiben 19 und 25 geringfügig zueinander versetzt. Die Versetzung beträgt z.B. ca. 1 mm. Die Praxis hat gezeigt, daß hierdurch das Verschleißverhalten der Dichtungsscheiben 19,25 verbessert wird.In the exemplary embodiment according to FIG. 1, the longitudinal axes are the central ones Channels 24 and 28 of the sealing washers 19 and 25 slightly offset from each other. The offset is e.g. approx. 1 mm. Practice has shown that this Wear behavior of the sealing washers 19.25 is improved.

    In dem Düsenkopf 1 nach der Fig. 1 ist die Stirnfläche der Dichtungsscheibe 25 an der dem Druckwasseranschluß 3 zugewandten Seite konvex und die zugeordnete Dichtfläche eines Stützkörper 29 konkav gekrümmt.The end face of the sealing disk 25 is in the nozzle head 1 according to FIG. 1 the side facing the pressurized water connection 3 is convex and the associated one Sealing surface of a support body 29 is concavely curved.

    Der Stützkörper weist einen mittigen gestuften Kanal 30 auf und ist dem Gehäuseteil 4 mit einem geringen Hub gleitbar gelagert. Die dem Druckwasseranschluß 3 zugewandte Stirnfläche 31 wird mit Druckwasser beaufschlagt, so daß der Stützkörper 29 mit der hierdurch erzeugten Kraft auf die konvexe Fläche der Dichtungsscheibe 25 gepreßt wird.The support body has a central stepped channel 30 and is the housing part 4 slidably supported with a small stroke. The pressure water connection 3 facing Pressurized water is applied to the end face 31, so that the support body 29 with the force generated thereby on the convex surface of the sealing washer 25 is pressed.

    Die wirksame, druckbelastete Stirnfläche 31 des Stützkörpers 29 wird nach außen durch einen in einer Gehäuseaufnahme vorgesehenen Dichtring 32 begrenzt. Zwischen dem Stützkörper 29 und der Dichtungsscheibe 25 ist ein den mittigen Kanal 30 des Stützkörpers 29 umgreifender Dichtring 33 aus Gummi oder Kunststoff in einer Aufnahme des Stützkörpers 29 angeordnet.The effective, pressure-loaded end face 31 of the support body 29 is outward limited by a sealing ring 32 provided in a housing receptacle. Between the support body 29 and the sealing washer 25 is a central channel 30 of the support body 29 encompassing sealing ring 33 made of rubber or plastic in one Recording the support body 29 arranged.

    Während bei dem dargestellten Ausführungsbeispiel die Spritzdüsen in dem Düsenträger derart angeordnet sind, daß das aus den Spritzdüsen austretende Druckwasser aufgrund des Rückstoßes den Düsenträger antreibt, besteht auch die Möglichkeit, den Düsenkopf über einen Motor anzutreiben, der in die Düsenkopfkonstruktion integriert ist.While in the illustrated embodiment, the spray nozzles in the nozzle holder are arranged such that the pressurized water emerging from the spray nozzles drives the nozzle carrier due to the recoil, there is also the possibility to drive the nozzle head via a motor that is integrated into the nozzle head construction is.

    Zur Festlegung der aus einem hochverschleißfesten Werkstoff, z. B. aus Keramik gefertigten Dichtungsscheiben 19 und 25 in den Aufnahmen der aus Stahl hergestellten Halterungen 20, 26 können die Halterungen auf die Dichtungsscheiben geschrumpft werden. Die die Dichtungsscheiben in den Aufnahmen der Halterungen festlegenden radial wirkenden Schrumpfkräfte müssen größer sein als die vom Strömungsmedium auf die Vorrichtung ausgeübten Kräfte. To determine the from a highly wear-resistant material such. B. made of ceramic manufactured sealing washers 19 and 25 in the receptacles made of steel Brackets 20, 26, the brackets can be shrunk onto the sealing washers will. The sealing washers in the mounts of the brackets the radially acting shrinkage forces must be greater than those of the flow medium forces exerted on the device.

    BezugszeichenlisteReference list

    11
    DüsenkopfNozzle head
    22nd
    Gehäusecasing
    33rd
    DruckwasseranschlußPressurized water connection
    44th
    GehäuseteilHousing part
    55
    GehäuseteilHousing part
    66
    TrägerkörperCarrier body
    77
    Kanalchannel
    88th
    HohlwelleHollow shaft
    99
    RingflanschRing flange
    1010th
    Wälzlagerroller bearing
    1111
    Wälzlagerroller bearing
    1212th
    Wälzlagerroller bearing
    1313
    DüsenträgerNozzle holder
    1414
    SpritzdüseSpray nozzle
    1515
    RotationsachseAxis of rotation
    1616
    KupferringCopper ring
    1717th
    PermanentmagnetPermanent magnet
    1818th
    RingkörperRing body
    1919th
    DichtungsscheibeSealing washer
    2020th
    Halterungbracket
    2121
    GewindestückThreaded piece
    2222
    AußengewindeExternal thread
    2323
    DichtungsringSealing ring
    2424th
    Kanalchannel
    2525th
    DichtungsscheibeSealing washer
    2626
    Halterungbracket
    2727
    DichtungsringSealing ring
    2828
    Kanalchannel
    2929
    StützkörperSupport body
    3030th
    Kanalchannel
    3131
    StirnflächeFace
    3232
    Dichtungpoetry
    3333
    Dichtungpoetry

    Claims (15)

    Düsenkopf mit einem um eine Längsachse drehbar gelagerten, antreibbaren Düsenträger und mit einem ortsfesten, einen Druckwasseranschluß aufweisenden Gehäuse, wobei im Gehäuse eine am Düsenträger befestigte Hohlwelle drehbar gelagert ist, durch deren mittigen Kanal das Druckwasser den Spritzdüsen des Düsenträgers zuführbar ist, dadurch gekennzeichnet, daß an dem dem Düsenträger (13) abgewandten Ende der Hohlwelle (8) eine mit einem mittigen Kanal (24) versehene, sich an der Stirnfläche der Hohlwelle abstützende, aus einem hochverschleißfesten Werkstoff bestehende Dichtungsscheibe (19) angeordnet und durch eine Halterung (20) an der Hohlwelle (8) festgelegt ist, und daß die dem Druckwasseranschluß zugewandten Stirnfläche der im Betrieb mit dem Düsenträger (13) und der Hohlwelle (8) drehbaren Dichtungsscheibe (19) sich an einer Dichtungsscheibe (25) aus einem hochverschleißfesten Werkstoff abstützt, auf die eine im ortsfesten Gehäuse (2) festgelegte Halterung (26) aufgebracht ist.Nozzle head with a drivable nozzle holder mounted rotatably about a longitudinal axis and with a stationary housing having a pressurized water connection, in which case a hollow shaft fastened to the nozzle holder is rotatably mounted, through the central channel of which the pressurized water can be fed to the spray nozzles of the nozzle holder, characterized in that On the end of the hollow shaft (8) facing away from the nozzle carrier (13), a sealing washer (19), which is provided with a central channel (24) and is supported on the end face of the hollow shaft and is made of a highly wear-resistant material, is arranged and attached by a holder (20) the hollow shaft (8) is fixed, and that the end face facing the pressurized water connection of the sealing disk (19) rotatable during operation with the nozzle carrier (13) and the hollow shaft (8) is supported on a sealing disk (25) made of a highly wear-resistant material on which a holder (2.) fixed in the stationary housing (2) 6) is applied. Düsenkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Halterungen (20,26) für die Dichtungsscheiben (19,25) aus Stahl gefertigt sind.Nozzle head according to claim 1, characterized in that the holders (20,26) for the sealing washers (19,25) are made of steel. Düsenkopf nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Halterungen (20,26) für die Dichtungsscheiben (19,25) als zylindrische Körper ausgebildet sind. Nozzle head according to claim 1 or 2, characterized in that the holders (20,26) for the sealing washers (19,25) designed as a cylindrical body are. Düsenkopf nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Halterung (20) ein Gewindestück (21) mit einem Innengewinde aufweist, das auf ein Außengewinde der Hohlwelle (8) geschraubt ist.Nozzle head according to one of claims 1 to 3, characterized in that the holder (20) has a threaded piece (21) with an internal thread, which is screwed onto an external thread of the hollow shaft (8). Düsenkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Halterung (26) mittels eines Dichtungsrings (27) verdrehfest in dem ortsfesten Gehäuse (2) verspannt ist.Nozzle head according to claim 1, characterized in that the holder (26) by means of a sealing ring (27) in the stationary housing (2) so that it cannot rotate. is tense. Düsenkopf nach Anspruch 1, dadurch gekennzeichnet, daß die zusammenwirkenden Stirnflächen der Dichtungsscheiben (19,25) feinstbearbeitet, vorzugsweise poliert sind.Nozzle head according to claim 1, characterized in that the interacting End faces of the sealing washers (19, 25) are precision machined, preferably are polished. Düsenkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Längsachsen der Kanäle (24,28) der Dichtungsscheibe (19,25) geringfügig zueinander versetzt sind.Nozzle head according to claim 1, characterized in that the longitudinal axes of the channels (24, 28) of the sealing washer (19, 25) are slightly offset from one another are. Düsenkopf nach Anspruch 7, dadurch gekennzeichnet, daß die Versetzung ca. 1 mm beträgt.Nozzle head according to claim 7, characterized in that the offset is approx. Is 1 mm. Düsenkopf nach Anspruch 1, dadurch gekennzeichnet, daß die ortsfeste Dichtungsscheibe (25) an dem dem Druckwasseranschluß (3) zugewandten Seite konvex und die zugeordnete Dichtfläche eines Stützkörpers (29) konkav gekrümmt ist.Nozzle head according to claim 1, characterized in that the stationary Sealing disc (25) on the pressure water connection (3) facing Convex side and the associated sealing surface of a support body (29) concave is curved. Düsenkopf nach Anspruch 9, dadurch gekennzeichnet, daß der Stützkörper (29) mit einem geringen Hub gleitbar im Gehäuse (2) und die dem Druckwasseranschluß (3) zugewandte Stirnfläche (31) mit Druckwasser beaufschlagt ist.Nozzle head according to claim 9, characterized in that the support body (29) with a small stroke slidable in the housing (2) and the pressurized water connection (3) facing end face (31) with pressurized water is. Düsenkopf nach Anspruch 10, dadurch gekennzeichnet, daß die wirksame, druckbeaufschlagte Stirnfläche (31) des Stützkörpers (29) nach außen durch einen in einer Gehäuseaufnahme vorgesehenen Dichtungsring (32) begrenzt ist.Nozzle head according to claim 10, characterized in that the effective, pressurized end face (31) of the support body (29) to the outside limits a sealing ring (32) provided in a housing receptacle is. Düsenkopf nach Anspruch 9, dadurch gekennzeichnet, daß zwischen dem Stützkörper (29) und der Dichtungsscheibe (25) ein den mittigen Kanal des Stützkörpers umgreifender Dichtring (33) aus Gummi oder Kunststoff in einer Aufnahme des Stützkörpers angeordnet ist.Nozzle head according to claim 9, characterized in that between the Support body (29) and the sealing washer (25) a the central channel of the Support body encompassing sealing ring (33) made of rubber or plastic in one Recording the support body is arranged. Düsenkopf nach Anspruch 1, dadurch gekennzeichnet, daß zwischen der Dichtungsscheibe (19) und der benachbart liegenden Stirnfläche der Hohlwelle (8) ein Dichtring (23) aus Gummi oder Kunststoff in einer Aufnahme der Hohlwelle (8) angeordnet ist.Nozzle head according to claim 1, characterized in that between the Sealing disc (19) and the adjacent end face of the hollow shaft (8) a sealing ring (23) made of rubber or plastic in a receptacle of the hollow shaft (8) is arranged. Düsenkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Dichtungsscheiben (19,25) aus einem keramischen Werkstoff (aus Keramik) oder aus einem verschleißfesten Lagerwerkstoff gefertigt sind.Nozzle head according to one of the preceding claims, characterized in that that the sealing washers (19, 25) made of a ceramic material (made of ceramic) or made of a wear-resistant bearing material are. Düsenkopf nach Anspruch 1, dadurchgekennzeichnet, daß die Halterungen (20, 26) auf die zugeordneten Dichtungsscheiben (19, 25) geschrumpft sind.Nozzle head according to claim 1, characterized in that the holders (20, 26) have shrunk onto the associated sealing washers (19, 25).
    EP98100757A 1997-03-21 1998-01-17 Nozzle head with a nozzle holder which is mounted on a bearing and rotatable about a longitudinal axis Withdrawn EP0865828A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19711837A DE19711837A1 (en) 1997-03-21 1997-03-21 Nozzle head with a drivable nozzle holder which is rotatably mounted about a longitudinal axis
    DE19711837 1997-03-21

    Publications (2)

    Publication Number Publication Date
    EP0865828A2 true EP0865828A2 (en) 1998-09-23
    EP0865828A3 EP0865828A3 (en) 1999-06-23

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98100757A Withdrawn EP0865828A3 (en) 1997-03-21 1998-01-17 Nozzle head with a nozzle holder which is mounted on a bearing and rotatable about a longitudinal axis

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    US (1) US6027040A (en)
    EP (1) EP0865828A3 (en)
    JP (1) JPH10263441A (en)
    AU (1) AU5628798A (en)
    DE (1) DE19711837A1 (en)

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    Also Published As

    Publication number Publication date
    JPH10263441A (en) 1998-10-06
    AU5628798A (en) 1998-09-24
    DE19711837A1 (en) 1998-09-24
    US6027040A (en) 2000-02-22
    EP0865828A3 (en) 1999-06-23

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