EP0568989A1 - Einspritzdüse für flüssige Medien - Google Patents

Einspritzdüse für flüssige Medien Download PDF

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Publication number
EP0568989A1
EP0568989A1 EP93107270A EP93107270A EP0568989A1 EP 0568989 A1 EP0568989 A1 EP 0568989A1 EP 93107270 A EP93107270 A EP 93107270A EP 93107270 A EP93107270 A EP 93107270A EP 0568989 A1 EP0568989 A1 EP 0568989A1
Authority
EP
European Patent Office
Prior art keywords
cover plate
nozzle
nozzle body
outlet opening
depression
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Withdrawn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
EP93107270A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ulrich Dr.-Ing. Rohs
Heinrich Dr.-Ing. Jeuken
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.)
Calsim Gesellschaft fur Simulationstechnik mbH
Original Assignee
Calsim Gesellschaft fur Simulationstechnik mbH
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 Calsim Gesellschaft fur Simulationstechnik mbH filed Critical Calsim Gesellschaft fur Simulationstechnik mbH
Publication of EP0568989A1 publication Critical patent/EP0568989A1/de
Withdrawn legal-status Critical Current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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3484—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with a return channel extending from the swirl chamber by-passing the swirl imparting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
    • B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
    • B05B1/3436—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis
    • 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
    • F02M61/02—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 of valveless type
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/047—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being formed by deformable nozzle parts, e.g. flexible plates or discs with fuel discharge orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/38—Nozzles; Cleaning devices therefor
    • F23D11/383—Nozzles; Cleaning devices therefor with swirl means

Definitions

  • the invention relates to an injection nozzle for liquid media, in particular fuels according to the preamble of claim 1.
  • Such an injection nozzle is known from DE-PS 24 07 856 and has proven itself well for spraying quantities of 0.05-10 kg / h.
  • the increasing requirements for keeping the environment clean and for the economic efficiency of combustion devices and engines make it necessary to further reduce the spray volume to extremely low values.
  • the invention has for its object to improve the known injection nozzle in terms of its spray accuracy.
  • the task is solved in specified injection nozzle according to the invention in the features specified in the characterizing part of claim 1. This ensures that the cover plate is held exactly in the center of the swirl chamber, thereby avoiding deflection of the spray jet due to insufficient centering of the outlet opening with respect to the swirl chamber.
  • the spray medium enters the swirl chamber at high pressure and undergoes swirl amplification there. It then flows at high pressure through the disk-shaped gap between the nozzle core surrounded by the swirl chamber and the cover plate and then, with maximum acceleration, enters the outlet opening of the cover plate from all sides, where the atomization takes place.
  • claim 2 provides a further improvement of the injection nozzle in that the central outlet opening of the cover plate has a depression on the inlet side over a substantial part of the thickness of the cover plate.
  • the depression forms a calming space running in the direction of spraying for the spray medium flowing in, even with the small possible dimensions.
  • the spraying is further improved according to the invention in that the collar of the nozzle housing located on the outlet side of the cover plate and carrying it forms a conical spraying opening, the opening angle of which is greater than 100 °.
  • a suction forms at the boundary layer of the spray jet, which leads to the deposition of a film of spray around and on the outlet opening. This also influences the spray jet, for example deflects it.
  • the embodiment according to the invention avoids this, the suction which arises at the boundary layer sucking in a sufficient amount of air and contributing to self-cleaning of the injection nozzle.
  • the configuration of the injection nozzle according to the invention enables a very wide control range with extremely small spray quantities.
  • Fig. 1 shows the lower part of an injection nozzle for a liquid medium, e.g. Fuel with a nozzle housing 1, which has a central bore 2, which is reduced in diameter at its outlet end by a collar 3.
  • a liquid medium e.g. Fuel with a nozzle housing 1, which has a central bore 2, which is reduced in diameter at its outlet end by a collar 3.
  • a cylindrical nozzle body 4 Arranged above this collar 3 is a cylindrical nozzle body 4, in the lower end face 5 of which a plurality of concentric grooves 6, 7 are incorporated, which are connected to one another by tangential swirl channels (not shown) in the web 8 located between the grooves 6 and 7.
  • the nozzle body 4 also has a central return duct 10.
  • the lower end face 5 of the nozzle body 4 also has one central depression 11, which serves for the positive reception of a part of the thickness of a cover plate 12.
  • This covers the above-mentioned grooves 6, 7 and forms with the end face 13 of the nozzle core 14 enclosed by the groove 7 a disk-shaped gap 15, the lateral surface of which is many times smaller than the cross section of a central outlet opening 16 in the cover plate 12 Cover plate 12 with the groove 6 a receiving chamber and with the groove 7 a swirl chamber 18 for the spray medium.
  • the cover plate 12 the thickness of which is a few ⁇ , advantageously consists of elastic material, e.g. Spring steel and can put on the end face 13 of the nozzle core 14 so that the thickness of the disk-shaped gap 15 is practically zero in the rest position and only increases by a small amount with the appropriate spray pressure.
  • elastic material e.g. Spring steel
  • the depression 11 in the nozzle body 4 ensures a perfect central position of the cover plate 12 with respect to the swirl chamber and avoids inaccuracies that could result from the tolerance between the nozzle housing 1 and the nozzle body 4.
  • FIG. 2 shows a modified and further improved embodiment of an injection nozzle according to the invention, the parts corresponding to FIG. 1 having the same reference numerals and not being described again.
  • the return duct is made larger in diameter at a distance from the end face 13 of the nozzle core 14.
  • an injector channel 21 leads out from the swirl chamber 18, the diameter of which is much smaller than that of the enlarged part 20 of the return channel 10. This results in a particularly favorable return of the unused spray material enables.
  • This injector channel 21 is, however, not absolutely necessary in view of the other features of this exemplary embodiment that differ from FIG.
  • the outlet opening 16 in the cover plate 12 has a depression 22 on its side facing the nozzle core 14, the depth of which makes up a substantial part of the thickness of the cover plate 12.
  • This depression forms a calming space for the spray material coming through the disk-shaped gap 15 under high acceleration even when the spray material flows from the swirl chamber from all sides at different speeds or amounts. This avoids that the spray jet is deformed or deflected in that the spray material emerges with pressure distributed uniformly over the entire cross section of the outlet opening 16.
  • the collar 3 of the nozzle housing 1 has a conical depression which forms a conical spray opening 23, the opening angle ⁇ of which is greater than 100 °.
  • This configuration causes air to be sucked into the conical boundary layer 24 of the spray jet, which air moves along the wall of the spray opening 23 to the outlet opening 16 and prevents the accumulation of a disruptive spray material film. This would deflect the spray jet and change the outlet opening. This training thus also causes self-cleaning of the injection nozzle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Fuel-Injection Apparatus (AREA)
EP93107270A 1992-05-08 1993-05-05 Einspritzdüse für flüssige Medien Withdrawn EP0568989A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4215122A DE4215122C1 (enrdf_load_stackoverflow) 1992-05-08 1992-05-08
DE4215122 1992-05-08

Publications (1)

Publication Number Publication Date
EP0568989A1 true EP0568989A1 (de) 1993-11-10

Family

ID=6458379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107270A Withdrawn EP0568989A1 (de) 1992-05-08 1993-05-05 Einspritzdüse für flüssige Medien

Country Status (4)

Country Link
US (1) US5320290A (enrdf_load_stackoverflow)
EP (1) EP0568989A1 (enrdf_load_stackoverflow)
JP (1) JPH0642432A (enrdf_load_stackoverflow)
DE (1) DE4215122C1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016030C1 (nl) * 2000-08-28 2002-03-01 Aquamarijn Holding B V Sproei inrichting met een nozzleplaat, een nozzleplaat, alsmede werkwijzen ter vervaardiging en voor toepassing van een dergelijke nozzleplaat.
US6669115B2 (en) * 2002-02-07 2003-12-30 Tai-Yen Sun Vortex twin-fluid nozzle with self-cleaning pintle
WO2005046852A2 (en) * 2003-11-07 2005-05-26 Angiotech Biomaterials Corporation Device and method for mixing and dispensing fluid components of a multicomponent composition
CN107763615A (zh) * 2016-08-19 2018-03-06 河南汇金智能装备有限公司 油枪

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1589242A (en) * 1921-08-08 1926-06-15 Super Diesel Tractor Corp Atomizer for internal-combustion engines and the like
US2144874A (en) * 1937-04-03 1939-01-24 Timken Roller Bearing Co Fuel injector
US2605142A (en) * 1948-10-25 1952-07-29 Gold Harold Spray device
DE2407856A1 (de) * 1974-02-19 1975-08-28 Ulrich Dipl Ing Rohs Einspritzduese fuer fluessige medien, insbesondere kraftstoff
DE3417657A1 (de) * 1984-05-12 1985-11-21 Ulrich Dipl.-Ing. 5160 Düren Rohs Einspritzduese fuer fluessige medien, insbesondere kraftstoff

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514581A (en) * 1944-03-15 1950-07-11 Shell Dev Method and atomizer for atomizing fuel oil
US3532271A (en) * 1967-02-23 1970-10-06 Frederick F Polnauer Spray nozzles with spiral flow fluid
JPS53144012A (en) * 1977-05-20 1978-12-15 Sharp Corp Nozzle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1589242A (en) * 1921-08-08 1926-06-15 Super Diesel Tractor Corp Atomizer for internal-combustion engines and the like
US2144874A (en) * 1937-04-03 1939-01-24 Timken Roller Bearing Co Fuel injector
US2605142A (en) * 1948-10-25 1952-07-29 Gold Harold Spray device
DE2407856A1 (de) * 1974-02-19 1975-08-28 Ulrich Dipl Ing Rohs Einspritzduese fuer fluessige medien, insbesondere kraftstoff
DE3417657A1 (de) * 1984-05-12 1985-11-21 Ulrich Dipl.-Ing. 5160 Düren Rohs Einspritzduese fuer fluessige medien, insbesondere kraftstoff

Also Published As

Publication number Publication date
JPH0642432A (ja) 1994-02-15
US5320290A (en) 1994-06-14
DE4215122C1 (enrdf_load_stackoverflow) 1993-08-19

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