EP0604741B1 - Buse à tourbillonnement pour pulvériser un liquide - Google Patents

Buse à tourbillonnement pour pulvériser un liquide Download PDF

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Publication number
EP0604741B1
EP0604741B1 EP93118034A EP93118034A EP0604741B1 EP 0604741 B1 EP0604741 B1 EP 0604741B1 EP 93118034 A EP93118034 A EP 93118034A EP 93118034 A EP93118034 A EP 93118034A EP 0604741 B1 EP0604741 B1 EP 0604741B1
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EP
European Patent Office
Prior art keywords
whirl
nozzle
swirl
central axis
nozzle outlet
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.)
Expired - Lifetime
Application number
EP93118034A
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German (de)
English (en)
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EP0604741A2 (fr
EP0604741A3 (fr
Inventor
Zoltan Farago
Tom Schork
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.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsches Zentrum fuer Luft und Raumfahrt eV
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Publication date
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Publication of EP0604741A2 publication Critical patent/EP0604741A2/fr
Publication of EP0604741A3 publication Critical patent/EP0604741A3/fr
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Publication of EP0604741B1 publication Critical patent/EP0604741B1/fr
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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
    • B05B1/3478—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 the liquid flowing at least two different courses before reaching the swirl chamber
    • 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
    • B05B1/3442—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 cone having the same axis as the outlet

Definitions

  • the invention relates to a swirl nozzle for atomizing a Liquid with a spread over a swirl chamber floor uplifting and opposite to the swirl chamber floor Swirl chamber tapering towards the nozzle outlet opening at least one opposite a central axis of the swirl chamber laterally offset into this swirl channel, with a Swirl parameters of> 1, with a different from the swirl chamber floor uplifting and the formation of an air core in one displacement body preventing swirl chamber at the bottom, which is arranged concentrically to the central axis and has an outer diameter in the bottom part, the at least one diameter of the nozzle outlet opening corresponds.
  • the one to be atomized flows Liquid through the swirl channel preferably in tangential direction in the swirl chamber in which it itself in the direction of the central axis of the swirl chamber with enlargement their peripheral speed moves. Since the Liquid with a swirl parameter of the swirl nozzle of> 1 due to the centrifugal forces not to the central axis can flow around the central axis air core extending the entire height of the swirl chamber which the liquid flows around and thus as rotating Liquid film ring passes through the nozzle outlet opening and then forms a liquid film cone that due to its own instability in small droplets of liquid disintegrates.
  • a swirl nozzle of the type mentioned is in FR-A-1 560 603. This also shows a swirl nozzle, at which with a high probability the swirl parameters> 1 and which is also a conical displacement body having.
  • a twist parameter ⁇ 0.5 was determined in GB-A-162 172 and in DE-A-175 561 it can be assumed that none at all Air core is present. It also follows from this Documentation that the cone body serves the opening angle of the spray cone to change what is against displacement of an air core speaks. For the rest, became a swirl parameter of approximately 0.4.
  • the invention is therefore based on the object To improve swirl nozzle of the generic type in such a way that this increases the input swirl pulse allows constant or lower swirl losses.
  • the height of the swirl chamber and thus the length of the air core keep it as low as possible that the swirl chamber wall has a conical surface with the largest possible cone angle, which, however, has a poor positive fit of the Partially would result, so that the wall surfaces of the recess which is the truncated cone seat for the truncated cone trained inner part form a smaller cone angle has as an adjoining the nozzle outlet opening Part of the swirl chamber wall.
  • the swirl nozzle according to the invention has it as Proven useful if the displacer is a cone with one that adjoins the nozzle outlet opening Partial range is corresponding cone angle.
  • the displacement body with at least the diameter of the nozzle outlet openings corresponding average diameter over at least about two thirds of the height of the swirl chamber extends.
  • a width of the annular portion of an extension the mouth opening from an outer edge of this Area in the radial direction corresponds to the inside means that this annular area is only as wide is chosen that this the mouth of the swirl channel can record.
  • the swirl channel in the mouth area with its center line essentially tangential to the swirl chamber wall runs.
  • a particularly large swirl channel eccentricity can be achieved, however, if the swirl channel with a mouth opening designed as a segment of a circle along an outer edge region of the swirl chamber floor opens into the swirl chamber, since in this case the radial extension of the mouth opening in the direction of the central axis is only a width of the swirl channel corresponds and the liquid jet when entering the swirl chamber thus flows along the swirl chamber wall and with a given swirl chamber diameter in greatest possible distance from the central axis into the swirl chamber flows in.
  • the swirl nozzle it is expedient when the swirl duct is straightened from a pressure chamber runs to the swirl chamber.
  • the swirl channel is spiraling with respect to the Central axis runs from a pressure chamber to the swirl chamber, because in this case the swirl channel with respect to the central axis can be provided with a lower slope and thus based on a constant flow rate the liquid in this swirl channel the one from this escaping liquid jet as large as possible Tangential velocity component in one plane perpendicular to the central axis and as small as possible Speed component parallel to the central axis having.
  • the swirl channels are preferably one have a substantially constant cross section.
  • the provision of the displacement body according to the invention has the advantage that the swirl chamber in the bottom area the shape of an annular space encircling the displacement body has so that there is no air core in this area can train who to those already described Twist loss leads.
  • the swirl channel eccentricity chosen larger without increasing the overall twist losses, so that a good atomization quality of the invention Swirl nozzles can be reached. It is even possible that Swirl channel eccentricity increase so far that the tangential velocity of the liquid jet less and thus a larger cross section of the swirl channels can be, so that the risk of clogging of the nozzle decreased.
  • the present invention offers Solution the possibility of the return hole to be arranged eccentrically to the displacement body.
  • the return bore in a distance from the central axis of the sinker is arranged, which is at least a radius of the nozzle outlet opening corresponds, so that a possibly in Area of residual air arising in the outlet opening does not stand above the return hole and thus influences it.
  • the return holes are arranged at a distance from the central axis, which is smaller than the distance of the mouth opening of the swirl channels.
  • a swirl nozzle for atomizing a liquid like it from is known in the art, shown in Fig. 1 and 2 shows an outer body 10, starting from the outer side 12 thereof there is a nozzle outlet opening designed as a cylindrical bore 13 into an interior of the outer body 10 extends.
  • This nozzle outlet opening 14 adjoins an essentially conical recess 16 at whose wall surfaces 18 the lateral surfaces of a coaxial to Nozzle outlet opening 14 arranged and to a central axis 20 form a rotationally symmetrical truncated cone.
  • an inner body 22 is used, which has a circular cylindrical region 24 which is followed by a frustoconical region 26 whose base area 28 is identical to the circular area.
  • This frustoconical region 26 is formed such that Are lateral surfaces 30 of the same section of the cone shell, on which the wall surfaces 18 of the recess 16 also lie.
  • the inner body 22 is form-fitting through a conical seat held in the recess 16, the area of the wall surfaces 18 of the recess 16, in which the lateral surfaces 30 of the frustoconical Area 26 of the inner body 22 abut as Tapered seats 32 of the recess 16 are designated.
  • Area 26 of the inner body 22 extends perpendicularly to the central axis 20 and forms a swirl chamber floor 34.
  • An area lying above this swirl chamber floor 34 the recess 16 is referred to as a swirl chamber 36, the wall surfaces 18 delimiting the swirl chamber 36 the recess 16 referred to as swirl chamber walls 38 are.
  • One enclosed by the recess 16 and on one of the swirl chamber 36 opposite side of the The inner body 22 is arranged as the pressure space 40 referred to, in which the intended for atomization Liquid is kept under pressure. From this pressure room 40 lead several swirl channels 42 into the swirl chamber 36, these swirl channels 42, such as in particular Fig.
  • notches in the lateral surfaces 30 are formed, which in the pressure chamber 40 with a rectangular and approximately square Cross section in the circular cylindrical region 24 of the inner body 22 open and in the swirl chamber 36 in the area of the swirl chamber base 34 and preferably in one area lying radially outside with respect to the central axis 20 open, with a centerline 44 of each swirl channel 42, at least in the area of an opening 46 the same, in the swirl chamber base 34 a distance e of the central axis 20 and thus from the mouth opening 46 a liquid jet 48 emerges, which when leaving the mouth opening 46 in a to the central axis 20 parallel and at a distance e from this Level 50 is a speed component 52 has parallel to the swirl chamber floor 34 and a speed component 54 parallel to Central axis 20.
  • the distance e is commonly called eccentricity e of the swirl nozzle.
  • a definition of the swirl parameter can also be found in the research report DFVLR-FB 87-25 (ISSN 0171-1342), page 22.
  • an air core always occurs with a swirl nozzle if the swirl parameter So> 1.
  • the occurrence of an air core can also be made dependent on the ratio of the sum of all swirl channel areas f 1 , f 2 , f 3 , f 4 to the cross-sectional area of the nozzle outlet opening, which should be less than 5 for this purpose.
  • a known Swirl nozzle shows a first embodiment of an inventive Swirl nozzle, shown in FIGS. 3 to 5, the same parts and features, thus in Figs. 3 to 5 are also provided with the same reference numerals.
  • the entire displacement body 62 is rotationally symmetrical to the central axis 20, the cylindrical base 64 with respect to the radial direction the central axis 20 to the mouth openings 46 of the swirl channels 42 extends outwards, so that the displacement body 62 the swirl chamber floor 34 in his central area 72 covered and a cylindrical Outer surface 74 of the cylindrical base 64 a subject to change annular region 76 of the swirl chamber base 34 limited internally.
  • cylindrical outer surface 74 form the cylindrical Base and a swirl chamber bottom opposite this arranged section of the swirl chamber wall 38 and the circular area of the swirl chamber base 34 an annular space 80, in which the liquid jet 48 tangential to the outer surface 74 of the cylindrical Base 64 is injected.
  • a surface 82 designed as a conical surface the conical tip 66 extends as in FIG. 3 shown, preferably at a distance b from one outlet-side section 84 of swirl chamber wall 38 and parallel to this, preferably the width b corresponds approximately to a width b of the swirl channels 42.
  • the swirl chamber 36 includes in the first embodiment the swirl nozzle according to the invention Annulus 80 arranged on the swirl chamber bottom which one of the conical surface 82 of the displacement body 62 and the outlet side Section 84 of the swirl chamber wall of limited cone-shaped Connects room 86, which in turn is in the cylindrical bore of the nozzle outlet opening 14 transforms.
  • FIGS. 6 and 7 A second embodiment of an inventive Swirl nozzle, shown in FIGS. 6 and 7, is so far than with the first embodiment of FIG. 3 to 5 is identical, provided with the same reference numerals, so that regarding the description of the corresponding Parts referred to the above statements becomes.
  • the Displacer 62 no longer a conical tip, but one sitting on the cylindrical base 64 Truncated cone 88 with a base 68 opposite it and parallel to the swirl chamber floor 34 Front surface 90, which lies in the swirl chamber 36 and has a diameter larger than a diameter of the nozzle outlet opening 14.
  • the displacement body in this embodiment 62 not over the entire height of the swirl chamber from the swirl chamber floor 34 to a transition 92 of the swirl chamber walls 38 into the nozzle outlet opening 14, but ends with the front surface 90 in Distance from this.
  • Swirl nozzle shown in Figs. 8 and 9, are insofar as the same parts as those described above Embodiments are available, the same Reference numerals are used so that the above Description can be referenced.
  • the swirl channels 42 are not notches with a straight center line 44 more, but run although along the lateral surfaces 30 of the inner body 22 as Straight, but show one designed as a circular ring segment 94 Mouth opening 46, which is therefore the possibility offers the annular region 76 of the Swirl body bottom 34 to the width b of the swirl channel 42 to reduce, so that the distance e from the mouth 46 emerging beam 48 from the central axis 20 almost with an outer radius of the swirl chamber base 34 is identical.
  • the displacement body 62 can thus only be in the form of a cone Tip 66 be formed, the base 68 of the conical tip 66 with respect to the central axis 20 has a radial extension that is up to an inner edge 96 of the circular ring segment Mouth openings 46 of the swirl channels 42 are sufficient.
  • Swirl chamber reduced to the cone-shaped space 86, which is between the conical surface 82 of the displacement body 62 and the swirl chamber wall 38 lies.
  • FIGS. 10 and 11 show insofar as the same reference numerals are used, the same parts as the above-described embodiments.
  • the fourth embodiment differs in that the wall surfaces of the recess 16 have two different partial areas 98 and 100, which is located directly at the nozzle outlet opening 14 adjoining partial area 98 of a truncated cone surface whose cone angle is greater than that of a truncated cone lateral surface of the Subarea 98 adjoining subarea 100, wherein the truncated cone surface of the portion 98 along a line of contact 102 in the truncated cone surface of section 100 passes over.
  • the conical seat surface becomes part 100 32 formed on which the inner body 22 with its Shell surfaces 30 abuts.
  • This inner body 22 is with regard to the formation of the swirl channels 42 and their Mouth openings 46 with the inner body 22 of the third Embodiment identical.
  • runs the conical surface 82 is now parallel to the partial area 98 at a distance b, which is approximately corresponds to the width of the swirl channels 42.
  • annular region 76 of the swirl chamber base 34 can be kept in the width of the swirl channel 42 can and also the conical surface 82 of the displacer 62 in one of the width of the Swirl channels 42 corresponding distance b from the partial area 98 can extend advantageously extends the partial area 100 over the conical seat surface 32 towards the nozzle outlet opening 14 to the line of contact 102 so that the swirl chamber 36 in the fourth embodiment, an annular space 104, formed by the cone seat surface 32 out to the contact line 102 extending portion 100, the annular region 76 and one Part of the surface 82 of the displacer 62 and the cone-shaped space 86 limited through section 98 and the rest of the Surface 82 of the displacer 62 comprises.
  • a fifth embodiment of the invention Swirl nozzle shown in FIGS. 12 and 13, is largely identical to the fourth embodiment, so that the same parts with the same reference numerals are provided.
  • the swirl channels 42 run from the pressure chamber 40 to the swirl chamber 36 in the area of Shell surface 30 of the inner body 22 spirally with respect the central axis 20 so that these swirl channels 42, based on the central axis 20, a smaller slope have than the swirl channels 42 in the fourth embodiment.
  • An exemplary embodiment is additionally a return bore 104 provided, which is concentric to the central axis 20 is arranged and in the swirl chamber 36 of the Nozzle outlet opening 14 opposite in the area of the displacer 62 opens.
  • the sinker 62 is no longer a cone, but only a truncated cone, the front surface of which is now covered by a Mouth opening 106 of the return bore 104 is formed.
  • This return bore 104 thus extends through the entire displacement body 62 and also through the inner body 22 through and is with a usual return flow path connected, which for example in the German Patent application P 37 03 075.2 is described.
  • a sixth embodiment shown in the 14 to 16 shows a variant of the first embodiment, shown in Figs. 3 to 5, so far used as the same parts, they are also the same Provide reference numerals so that with regard to their Description on the explanations of the first embodiment can be referred.
  • This sixth embodiment shows in contrast to first embodiment in the conical surface 82 of the conical tip 66 incorporated return holes 110, which is perpendicular to the conical Surface 82 standing longitudinal axes 112 in the displacement body 62 penetrate towards its central axis 20, being arranged in a coaxial to the central axis Return channel 114 open, which of the conical Tip 66 of the sinker in opposite Direction leads to an interior of the nozzle.
  • the return bores 110 are not in the Area of the nozzle outlet opening 14 arranged, but in one of the exit-side section 84 of the swirl chamber wall 38 overlapped so that the return bore 110th not in the area of one in the nozzle outlet opening 14 emerging air core.
  • a fifth embodiment of the invention Swirl nozzle shown in Figs. 17 and 18 has similarities with the second embodiment so that the same Parts are also provided with the same reference numerals.
  • the mouth openings 46 form a ring segment cutout 120 expanded, the width of the width of the annular swirl chamber bottom 34 between the frustoconical Displacement body 62 and the swirl chamber walls 38 corresponds.
  • the displacement body 62 without the cylindrical Approach as a truncated cone 88 directly from the swirl chamber floor 34 and extends to the front surface 90, which is approximately the diameter of the nozzle outlet bore 14 corresponding diameter.
  • Particularly advantageous in the seventh embodiment is the fact that this is easy to manufacture and that the cross-sectional area of the orifices 46 is large is what leads to relatively low viscosity-related pressure drops leads.

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Claims (12)

  1. Buse à tourbillonnement pour pulvériser un liquide, comportant une chambre de buse (36), qui s'élève au-dessus d'un fond (34) de la chambre de buse et se rétrécit en direction d'une ouverture (14) de sortie de la buse, qui est située à l'opposé du fond (34) de la chambre de buse, au moins un canal à tourbillonnement qui débouche dans la chambre à tourbillonnement (36) en en étant décalé latéralement par rapport à un axe médian de la chambre à tourbillonnement, avec un paramètre de tourbillonnement > 1, un corps de refoulement (62), qui s'élève à partir du fond (34) de la chambre à tourbillonnement et empêche la formation d'un noyau d'air (58) dans une zone de la chambre à tourbillonnement, située du côté du fond, et qui est disposée concentriquement par rapport à l'axe médian (20) et possède, dans la partie située du côté du fond, un diamètre extérieur, qui correspond au moins à un diamètre de l'ouverture (14) de sortie de la buse, et dans lequel la buse à tourbillonnement possède un corps extérieur (10), qui entoure l'ouverture (14) de sortie de la buse et un évidement (16), qui se raccorde à ladite ouverture, s'étend le long de l'axe médian (20) et possède une section transversale qui augmente dans la direction croissante d'extension, et un corps intérieur (22) peut être inséré selon une liaison par formes complémentaires dans cet évidement (16), le fond (34) de la chambre à tourbillonnement étant perpendiculaire à l'axe médian (20), de sorte que le fond (34) de la chambre à tourbillonnement et des surfaces (18) de l'évidement (16), situées entre ce fond et l'ouverture (14) de sortie de la buse, délimitent la chambre à tourbillonnement (36), et dans lequel une zone partielle (100) des surfaces de paroi (18) de l'évidement (16) forme une surface de siège conique (32) pour le bord intérieur (22) réalisé avec une forme tronconique, caractérisée en ce que les surfaces de paroi (18) de l'évidement (16) sont formées par des surfaces enveloppes de troncs de cône coaxiaux à l'axe médian (20), que la surface de siège conique (32) possède un angle au sommet inférieur à celui d'une autre zone partielle (98) de la paroi (38) de la chambre à tourbillonnement, qui se raccorde à l'ouverture (14) de sortie de la buse, de sorte que la chambre à tourbillonnement (36) est réalisée avec une hauteur aussi faible que possible, et que le corps de refoulement (62) s'étend, sur au moins la moitié de la hauteur de la chambre à tourbillonnement (36) en direction de l'ouverture (14) de sortie de la buse, en moyenne avec un diamètre qui correspond au moins au diamètre de l'ouverture (14) de sortie de la buse.
  2. Buse à tourbillonnement selon la revendication 1, caractérisée en ce que le corps de refoulement (62) s'étend, avec un diamètre moyen correspondant au moins au diamètre de l'ouverture (14) de sortie de la buse, sur au moins les deux tiers de la hauteur de la chambre à tourbillonnement (36) en direction de l'ouverture de sortie de la buse (14).
  3. Buse à tourbillonnement selon l'une des revendications précédentes, caractérisée par une surface (74,82) du corps de refoulement (62), qui est tournée vers la paroi (38) de la chambre à tourbillonnement, est située annulairement dans chaque plan de coupe transversal par rapport au plan médian (20) respectivement à une distance constante de la paroi (38) de la chambre à tourbillonnement.
  4. Buse à tourbillonnement selon la revendication 3, caractérisée en ce que dans une partie du corps de refoulement (62) tournée vers l'ouverture (14) de sortie de la buse, la surface (82), tournée vers la paroi (38) de la chambre à tourbillonnement, s'étend à une distance constante de cette paroi.
  5. Buse à tourbillonnement selon la revendication 4, caractérisée en ce que la distance correspond approximativement à une largeur (b) du canal à tourbillonnement (42).
  6. Buse à tourbillonnement selon l'une des revendications précédentes, caractérisée en ce qu'une ouverture d'embouchure (46) du canal à tourbillonnement (42) est située dans une partie annulaire (76), qui s'étend autour du corps de refoulement (62), du fond (34) de la chambre à tourbillonnement.
  7. Buse à tourbillonnement selon la revendication 6, caractérisée en ce que la largeur de la zone annulaire (76) est choisie de telle sorte qu'elle correspond à l'étendue de l'ouverture d'embouchure (46) dans une direction radiale vers l'intérieur, à partir d'un bord extérieur de cette zone (76).
  8. Buse à tourbillonnement selon la revendication 7, caractérisée en ce que le canal à tourbillonnement (42) débouche, par une ouverture d'embouchure agencée sous la forme d'un segment de cercle (94), dans la chambre à tourbillonnement (36), le long d'une zone de bord extérieur du fond (34) de la chambre à tourbillonnement.
  9. Buse à tourbillonnement selon l'une des revendications précédentes, caractérisée en ce que le corps de refoulement (62) est pourvu d'un perçage central de retour (104).
  10. Buse à tourbillonnement selon l'une des revendications précédentes, caractérisée en ce que le corps de refoulement (62) est pourvu d'au moins un perçage de retour (110) disposé de façon excentrée.
  11. Buse à tourbillonnement selon la revendication 10, caractérisée en ce que le perçage de retour (110) est situé à une distance de l'axe médian (20), qui correspond au moins au rayon de l'ouverture (14) de sortie de la buse.
  12. Buse à tourbillonnement selon la revendication 11, caractérisée en ce que le perçage de retour (110) est disposé à une distance de l'axe médian (20), qui est inférieure à la distance de l'ouverture d'embouchure (46) du canal à tourbillonnement (42).
EP93118034A 1987-12-11 1988-12-09 Buse à tourbillonnement pour pulvériser un liquide Expired - Lifetime EP0604741B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3742015 1987-12-11
DE3742015 1987-12-11
EP89900234A EP0346417B1 (fr) 1987-12-11 1988-12-09 Ajutage a tourbillon vaporisateur de liquides

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP89900234A Division EP0346417B1 (fr) 1987-12-11 1988-12-09 Ajutage a tourbillon vaporisateur de liquides
EP89900234.9 Division 1988-12-09

Publications (3)

Publication Number Publication Date
EP0604741A2 EP0604741A2 (fr) 1994-07-06
EP0604741A3 EP0604741A3 (fr) 1994-11-30
EP0604741B1 true EP0604741B1 (fr) 1998-05-13

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Application Number Title Priority Date Filing Date
EP89900234A Expired - Lifetime EP0346417B1 (fr) 1987-12-11 1988-12-09 Ajutage a tourbillon vaporisateur de liquides
EP93118034A Expired - Lifetime EP0604741B1 (fr) 1987-12-11 1988-12-09 Buse à tourbillonnement pour pulvériser un liquide

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Application Number Title Priority Date Filing Date
EP89900234A Expired - Lifetime EP0346417B1 (fr) 1987-12-11 1988-12-09 Ajutage a tourbillon vaporisateur de liquides

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US (1) US5067655A (fr)
EP (2) EP0346417B1 (fr)
DE (2) DE3856185D1 (fr)
WO (1) WO1989005195A1 (fr)

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DE69210603T2 (de) * 1991-05-20 1996-09-12 Goeran Tuusula Sundholm Ausrüstung zur brandbekämpfung
US5655608A (en) * 1991-05-20 1997-08-12 Sundholm; Goeran Fire fighting equipment
US5392993A (en) * 1994-01-21 1995-02-28 Grinnell Corporation, Fire protection nozzle
US5522549A (en) * 1994-10-24 1996-06-04 Sheu; Kun N. Jet nozzle assembly for removing pests from crops
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US5067655A (en) 1991-11-26
DE3856185D1 (de) 1998-06-18
WO1989005195A1 (fr) 1989-06-15
DE3851750D1 (de) 1994-11-10
EP0346417B1 (fr) 1994-10-05
EP0604741A2 (fr) 1994-07-06
EP0346417A1 (fr) 1989-12-20
EP0604741A3 (fr) 1994-11-30

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