WO2018095621A1 - Adaptateur pour la production d'un jet de fluide et dispositif de découpage au jet de fluide - Google Patents

Adaptateur pour la production d'un jet de fluide et dispositif de découpage au jet de fluide Download PDF

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Publication number
WO2018095621A1
WO2018095621A1 PCT/EP2017/075139 EP2017075139W WO2018095621A1 WO 2018095621 A1 WO2018095621 A1 WO 2018095621A1 EP 2017075139 W EP2017075139 W EP 2017075139W WO 2018095621 A1 WO2018095621 A1 WO 2018095621A1
Authority
WO
WIPO (PCT)
Prior art keywords
adapter
fluid
injector
fluid jet
nozzle
Prior art date
Application number
PCT/EP2017/075139
Other languages
German (de)
English (en)
Inventor
Bernd Stuke
Malte Bickelhaupt
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2018095621A1 publication Critical patent/WO2018095621A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet

Definitions

  • the invention relates to an adapter for generating a fluid jet, as used for example for fluid jet cutting use, and an apparatus for fluid jet cutting.
  • DE 10 2013 201 797 A1 discloses a fluid jet cutting device in which a fuel injector is used.
  • the fuel injector is used to generate the fluid jet with which the workpiece is to be cut, wherein the injector must be adapted.
  • fuel injectors are designed to introduce fuel under high pressure into combustion chambers of internal combustion engines.
  • the fuel injectors have at their combustion-chamber-side end a plurality of injection openings, which are designed and arranged to distribute the fuel as widely as possible in the combustion chamber.
  • the injection nozzle For use in a fluid jet cutting device, at least the injection nozzle must be specially adapted by not providing the usual injection openings, but a single, larger injection opening facing in the desired cutting direction, for example in the longitudinal direction of the fuel injector. This special adjustment of the fuel injector requires other and additional operations, which makes such a fuel injector more expensive.
  • Fluid jet cutting device can be operated.
  • the adapter which is operated with an at least two nozzle openings having injector, an adapter body having an opening for receiving the part of the injector, in which the nozzle openings are formed.
  • the adapter body has an outlet opening for ejecting the introduced into the adapter via the nozzle openings of the injector fluid, wherein the adapter body has a sealing surface on which the injector rests so that all but one nozzle opening all nozzle openings covered by the adapter and thus closed or all the nozzle openings open into a flow chamber in the adapter body.
  • the fluid which is present under high pressure within the injector remains only an open nozzle opening through which the fluid can flow.
  • the amount of fluid flowing through this nozzle opening is correspondingly higher, so that the individual fluid jet thus generated can be used for fluid jet cutting.
  • all of the nozzle openings of the injector can also open into a flow chamber, which is formed in the adapter body of the adapter and from which, in turn, a single outlet opening for generating the fluid jet emanates. With this adapter so the usual injectors can be used without these need to be specially adapted.
  • the adapter is formed so that the sealing surface is conical and the injector can lie fluidly against it.
  • the high pressure fluid within the injector exclusively via the intended outlet opening of the adapter.
  • the flow chamber in the adapter body is formed such that it has an extended section and an at least substantially conical section, which opens into the outlet opening.
  • the nozzle openings thus introduce the compressed fluid into the widened section, which, with suitable shaping of the widened section, passes into the conical section without major pressure losses and from there, with further acceleration of the fluid, opens into the outlet opening.
  • This can be a single fluid jet produce, which is well suited for fluid jet cutting.
  • a feed opens into the flow chamber, wherein an additive can be added to the fluid via the feed.
  • the additives can serve, for example, to reduce the shear forces within the fluid and thus the losses that inevitably result from the deflection of the fluid flow.
  • a further supply can be provided in the adapter body, via which an abrasive medium can be introduced into the flow chamber.
  • the abrasive medium consists for example of abrasive particles, which are entrained by the fluid flow and hit the fluid to the workpiece to be machined, which improves the cutting action or the Ent fürungsrial, if the workpiece is not cut, but stripped or otherwise processed ,
  • a fluid jet cutting device comprises a high-pressure pump, which provides a compressed fluid and is connected to an injector, which can eject the compressed fluid via at least two nozzle openings, wherein the injector is connected to an adapter according to the invention.
  • the fluid jet cutting device has an interrupter unit which is arranged inside the injector, so that the fluid flow and thus the fluid jet can be interrupted and released alternately from the nozzle openings.
  • the interrupter unit is advantageously a nozzle needle.
  • Figure 1 is a schematic representation of a fluid jet cutting device with an injector, which cooperates with a corresponding adapter, in a schematic representation, wherein only the essential components are shown,
  • FIG. 2 shows another embodiment of an adapter according to the invention, as well as
  • FIG. 1 shows an inventive adapter for generating a single fluid idstrahls is represented by an injector according to a first embodiment, wherein the adapter is shown as part of a fluid jet cutting device.
  • the fluid jet cutting device is shown schematically here and comprises a tank 1, in which the fluid used for fluid jet cutting is kept available. Via a line 2, the fluid is fed to a high-pressure pump 3, which compresses the fluid and supplies via a high-pressure line 5 to an injector 4, wherein the injector 4 is shown here schematically and only with its essential components.
  • the injector 4 comprises a nozzle needle 7, which is arranged longitudinally displaceable in a nozzle body 6.
  • a nozzle seat 8 is formed, which has a substantially conical shape, wherein the nozzle needle 7 cooperates with a conical sealing surface with the conical nozzle seat 8 and thereby opens and closes a plurality of nozzle openings 13
  • This pressure chamber 20 is connected via the high-pressure line 5 to the high-pressure pump 3, so that there is always a high fluid pressure in the pressure chamber 20, as is required to produce a correspondingly strong fluid jet.
  • the nozzle needle 7 is longitudinally displaceable and is guided with its end facing away from the nozzle seat 8 in a guide body 9, which has a receptacle for the nozzle needle 7.
  • a control chamber 10 is limited.
  • the control chamber 10 is connected via an inlet throttle 11 with a high pressure line 5, so that in this a high fluid pressure can be introduced.
  • the control chamber 10 via an outlet throttle 12 with a return line 23 and connected via this with the tank 1, wherein in the return line 23 for connecting the outlet throttle 12 with the drain line 23, a control valve 15 is provided, which is 2/2 Control valve is formed and, for example, via an electromagnet or other electrical actuator is switchable.
  • the inlet throttle 11 and the outlet throttle 12 are matched to one another such that more fluid can flow via the outlet throttle 12 than can flow via the inlet throttle 11, so that the fluid pressure in the control chamber 10 is lowered when the control valve 15 is open. If the control valve 15 is closed, the high pressure builds up again in the control chamber 10, as provided by the high-pressure pump 3.
  • This control principle is well known from fuel injectors. In addition to this control principle but other injectors can be used, in which the Düsenna- del 7, for example, is moved directly by the action of an electromagnet or the nozzle needle is moved by the changing pressure in the pressure chamber 20 against the force of a closing spring.
  • an adapter 16 which comprises an adapter body 17 and is fixed by a device not shown in more detail on the nozzle body 6 is used.
  • the adapter body 17 has a receptacle 24 which receives the lower part of the nozzle body 6 in FIG. 1, in which the nozzle openings 13 are formed.
  • a flow chamber 18 is formed, which has an enlarged portion 21 and an adjoining conical portion 22.
  • the conical section 2 narrows to the end de of the adapter body 17 and goes at its end in an outlet opening 25 via.
  • the nozzle body 6 bears sealingly against a contact surface 14 of the nozzle body 6 with a conical sealing surface 19, so that the flow chamber 18 is closed except for the outlet opening 25 and the inlet via the nozzle openings 13.
  • the nozzle openings 13 are formed so that they open into the widened portion 21 of the flow chamber 18, wherein the extended portion 21 is aerodynamically shaped so that the exiting through the nozzle openings 13 fluid jets diverted through the wall of the flow chamber 18 largely lossless and in be passed the conical section 22.
  • the fluid is accelerated toward the outlet opening 25 by the conical configuration of the conical section 22, exits through the outlet opening 25 and forms a fluid jet 27. Since the fluid in the injector 14 exits under high pressure, as provided by the high-pressure pump 3 is, results in a fluid jet
  • FIG. 2 shows a further embodiment of the adapter according to the invention
  • the adapter 16 with its adapter body 17 is largely identical to the adapter 16 shown in Figure 1, but here is provided in the region of the outlet opening 25, a feed 32 for an abrasive.
  • An abrasive is a substance consisting of abrasive particles, for example a sand, which increases the cutting action of the fluid.
  • the abrasive particles are added via the feed 32 to the fluid jet 27 and entrained with the fluid, so that the abrasive particles, together with the fluid jet 27, strike the workpiece 26 to be machined.
  • the cutting action of the fluid jet 27 can be significantly improved so that materials which would not be able to be cut without abrasive particles are now severed or even a lower pressure for the operation of the Fluidstrahlschneide- machine is sufficient.
  • Abrasive particles can also improve the stripping action of the fluid jet 27.
  • the fluid jet 27 does not cut the workpiece, but frees it from a firmly adhering layer, for example a ceramic layer or a lacquer layer.
  • Workpiece can be achieved that the fluid jet does not damage the workpiece, but only removes the firmly adhering coating.
  • FIG. 3 shows a further exemplary embodiment of the adapter 16 according to the invention, which differs from the adapter shown in FIG.
  • Feeder 30 differs, via which an additive can be supplied to the fluid.
  • This additive can be, for example, a polymer solution or other hydrocarbons that are used to reduce the shear forces within the fluid. As a result, the deflection losses which occur due to the change in direction of the fluid within the flow chamber can be reduced, so that the effectively available fluid pressure at the outlet opening 25 is increased.
  • Both abrasive particles can also be supplied via the feed 32 and additives via the feed 30 to the fluid jet.
  • FIG. 4 shows a further embodiment of the adapter 16 'according to the invention, but which has a different shape.
  • the adapter 16 ' has an adapter body 17', in which the flow chamber 18 is formed in the form of a bore and thus forms an opening 28.
  • the outlet opening 25 forms the end of the opening 28 and is formed so large that the fluid jet, which exits through one of the nozzle openings 13, passes through the opening 28 without loss and forms the fluid jet 27.
  • the adapter body 17 ' is designed so that it closes all the other nozzle openings so that fluid exits exclusively through one of the nozzle openings 13 and forms the fluid jet 27.
  • a single fluid jet 27 is formed with a conventional one Injector, as it is used for fuel injection in the combustion chambers of internal combustion engines, without structural changes to the injector, in particular at the nozzle must be made.
  • the fluid jet 27 does not emerge here parallel to the longitudinal axis of the nozzle needle 7, so that in the fluid jet cutting device using the corresponding adapter 16 'another angle to the workpiece must be maintained.
  • the nozzle body 6 rests against a sealing surface 19, which is conically formed, which cooperates sealingly with the contact surface 14 of the nozzle body 6, so that the flow chamber 18 is closed except for the outlet opening 25 and the inlet via the nozzle openings 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

L'invention concerne un adaptateur (16) destiné à produire un jet de fluide (27) individuel par l'intermédiaire d'un injecteur (4) qui présente au moins deux ouvertures de buse (13) à travers lesquelles le fluide comprimé peut s'écouler, ledit adaptateur comprenant un corps (17) qui présente une ouverture (24) destinée à recevoir la partie de l'injecteur (4) dans laquelle sont ménagées les ouvertures de buse (13). L'adaptateur (16) présente une ouverture de sortie (25) pour injecter le fluide introduit dans l'adaptateur (16) par l'intermédiaire des ouvertures de buse (13), le corps d'adaptateur (17) présentant une surface d'étanchéité (19) sur laquelle est appliqué l'injecteur (4) de telle sorte que, soit toutes les ouvertures de buse (13), à l'exception d'une, sont recouvertes par l'adaptateur (16) et donc fermées, soit toutes les ouvertures de buse (13) débouchent dans une chambre d'écoulement (18) dans le corps d'adaptateur (17).
PCT/EP2017/075139 2016-11-22 2017-10-04 Adaptateur pour la production d'un jet de fluide et dispositif de découpage au jet de fluide WO2018095621A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016222967.2 2016-11-22
DE102016222967.2A DE102016222967A1 (de) 2016-11-22 2016-11-22 Adapter zur Erzeugung eines Fluidstrahls und Vorrichtung zum Fluidstrahlschneiden

Publications (1)

Publication Number Publication Date
WO2018095621A1 true WO2018095621A1 (fr) 2018-05-31

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ID=60117649

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Application Number Title Priority Date Filing Date
PCT/EP2017/075139 WO2018095621A1 (fr) 2016-11-22 2017-10-04 Adaptateur pour la production d'un jet de fluide et dispositif de découpage au jet de fluide

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DE (1) DE102016222967A1 (fr)
WO (1) WO2018095621A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224458A (en) * 1991-10-31 1993-07-06 Aisan Kogyo Kabushiki Kaisha Multi-hole injector with improved atomization and distribution
EP1408225A1 (fr) * 2002-10-07 2004-04-14 Robert Bosch Gmbh Adaptateur pour vaporisateur
DE102013201797A1 (de) 2013-02-05 2014-08-07 Robert Bosch Gmbh Vorrichtung mit einer Hochdruckpumpe zum Fördern eines Fluids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224458A (en) * 1991-10-31 1993-07-06 Aisan Kogyo Kabushiki Kaisha Multi-hole injector with improved atomization and distribution
EP1408225A1 (fr) * 2002-10-07 2004-04-14 Robert Bosch Gmbh Adaptateur pour vaporisateur
DE102013201797A1 (de) 2013-02-05 2014-08-07 Robert Bosch Gmbh Vorrichtung mit einer Hochdruckpumpe zum Fördern eines Fluids

Also Published As

Publication number Publication date
DE102016222967A1 (de) 2018-05-24

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