EP3302815B1 - Corps de turbulence ainsi que buse à jet conique dotée d'un tel corps de turbulence - Google Patents

Corps de turbulence ainsi que buse à jet conique dotée d'un tel corps de turbulence Download PDF

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Publication number
EP3302815B1
EP3302815B1 EP17739597.7A EP17739597A EP3302815B1 EP 3302815 B1 EP3302815 B1 EP 3302815B1 EP 17739597 A EP17739597 A EP 17739597A EP 3302815 B1 EP3302815 B1 EP 3302815B1
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EP
European Patent Office
Prior art keywords
swirl
section
channels
swirl body
channel
Prior art date
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Active
Application number
EP17739597.7A
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German (de)
English (en)
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EP3302815A1 (fr
Inventor
Andreas LÁZÁR
Marc UTZENRATH
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Swedex Industrieprodukte GmbH
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Swedex Industrieprodukte GmbH
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Publication of EP3302815A1 publication Critical patent/EP3302815A1/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
    • B05B1/3415—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 swirl imparting inserts upstream of 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
    • 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
    • B05B1/3447—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 cylinder having the same axis as the outlet

Definitions

  • the invention relates to a swirl body, in particular for use in a cone nozzle, such as a full cone nozzle or a hollow cone nozzle, in order to set a flowing fluid in rotation, with a cylindrical base section which defines a cylindrical outer surface, with each of the two front ends of the base section a conically tapering end section defining a cone-like end face is connected, and wherein in the cylindrical outer surface of the swirl body, several swirl channels of the same geometry running obliquely to a central axis of the swirl body are formed with a uniform offset along the circumference of the swirl body and each swirl channel opens into both cone-like end faces.
  • Swirl nozzles for atomizing liquids have long been used in many technical fields. For example, such nozzles are used for painting, irrigation and cleaning purposes.
  • the liquid to be sprayed is first set in rotation within the nozzle.
  • the present invention relates to the first method in which the liquid to be sprayed through at least one swirl channel on the outer surface a cylindrical swirl body flows obliquely to a central longitudinal axis of the swirl body, creating a rotational flow.
  • the liquid set in rotation then exits the at least one swirl channel open at the end, enters an exit chamber and leaves the swirl nozzle from there via an exit opening of the nozzle housing that is widened in the direction of flow in a funnel shape.
  • a swirl nozzle designed in this way in which the liquid to be sprayed flows through the swirl body only through the swirl channel or channels formed in its outer surface, has the effect that the liquid does not fill the entire nozzle outlet diameter.
  • a centrifugal force acts on the rotating fluid and, on the other hand, the rotational flow leads to a pressure gradient between the wall of the outlet chamber and the central longitudinal axis of the swirl body.
  • a relatively thin, hollow-cone-like liquid film is thus formed, which breaks up into individual fine droplets immediately after the nozzle outlet opening.
  • Such swirl nozzles are also called hollow cone nozzles, the hollow cone spray of which means that a sprayed surface is only covered in a ring shape with the sprayed liquid.
  • the two end faces of the cylindrical swirl body from the DE 20 2015 001 520 U1 are designed as flat end faces on which liquid residues can collect after the end of a spraying process.
  • the areas of the flat end faces on which liquid residues can collect are referred to as "dead areas” and the spaces that can be occupied by the liquid residues and adjoining the dead areas are referred to as "dead spaces”.
  • dead areas The areas of the flat end faces on which liquid residues can collect.
  • dead spaces the spaces that can be occupied by the liquid residues and adjoining the dead areas.
  • the liquid residues located on the dead surfaces or in the dead spaces can lead to corrosion of the nozzle components with their increasing dwell time.
  • a conical nozzle with a swirl body of the type mentioned is from the DE 94 11 591 U1 known.
  • the swirl body here has a cylindrical base section, each of which is adjoined by a conical end section.
  • several swirl channels are formed, which extend along the cylindrical base section into the conical end sections.
  • the swirl body is arranged in a jacket tube, and a diaphragm is provided in this jacket tube upstream of the swirl body. This serves to create a vortex ring between the diaphragm and the swirl body, which pulls the medium particles from the inside out.
  • US 2015/0202636 A1 discloses a swirl body for a full cone nozzle from the prior art.
  • the present invention is based on the object of designing a swirl body of the type mentioned at the outset in such a way that the use of an upstream diaphragm in the installed state can be dispensed with.
  • the two swirl channels are designed and arranged identically and expediently have a constant inclination over their length with respect to the central axis of the cylindrical base section.
  • the swirl body is penetrated by a central central bore which extends along its central axis.
  • a central central bore which extends along its central axis.
  • Such a swirl body with a central central bore which is inserted into a conical nozzle, enables the formation of a full cone spray pattern with a uniform distribution of liquid downstream of an outlet opening of the conical nozzle.
  • the central central bore ensures that not only edge areas, but also a central area of an outlet chamber of the conical nozzle is exposed to liquid.
  • the diameter of the central bore can be selected so that it is in a preferred ratio to the dimensions of the at least one swirl channel.
  • the central bore contributes to the most complete possible closure of liquid residues remaining in the nozzle after a spraying process has ended.
  • not part of the present invention for generating a full cone spray pattern is used a swirl body which does not have such a central central bore.
  • the inclination of the swirl channels is chosen so that the two open axial ends of each swirl channel overlap in the circumferential direction and thus a lower end opening of a swirl channel is visible when looking axially through the upper end opening of the swirl channel.
  • the angle of inclination of the swirl channels is preferably selected so that at least 50%, in particular at least 60% and preferably at least 70% of the lower end opening of the swirl channel is visible when looking axially through the upper end opening of the swirl channel.
  • the swirl body is designed as a solid body which tapers in the shape of a cone at its ends.
  • the tip angle of the end faces or the conical end sections in a further development of the invention is greater than 90 °, in particular greater than 100 ° and preferably greater than 115 ° and is in particular 118 °.
  • the ratio between the diameter of the base portion and the axial Length of the swirl body is in the range from 0.6 to 1.5, in particular in the range from 0.7 to 1.3 and preferably in the range from 0.8 to 1.2.
  • the diameter of a series of swirl bodies is 9 mm and 6 mm, the height in each case being uniformly 7.5 mm.
  • the same swirl body can be used to generate a hollow conical spray pattern. It is only necessary to enlarge the angle that the swirl channels enclose with the central longitudinal axis by at least 15 °, in particular 15 to 20 °, compared to the swirl body, which is designed for generating a full cone spray pattern.
  • the swirl channels have a cross section which, at its radially inner end, has a circular segment-shaped or semicircular end section, that is to say an (approximately) semicircular end section. It is not important that this end section is exactly semicircular. Rather, it is essential that it can be produced by a milling cutter with a predetermined diameter.
  • the end section can also cover a circular surface section of less than 180 °.
  • a semicircular end section which covers a circular area of 180 °, can also be followed by a straight cross-sectional section radially on the outside, the length of the straight cross-sectional section being a maximum of 30%, in particular a maximum of 20% and preferably a maximum of 10% of the radius of the semicircular end section.
  • the straight cross-sectional section should have a short length compared to the semicircular end section.
  • a special swirl body of this design is characterized in that the diameter of the base body is 9 mm and the inclination of the swirl channels relative to the central axis is selected as a function of the total area of the swirl channels according to the table below: Area of the swirl channels in [mm 2 ] Angular inclination ( ⁇ ) in [°] 23.64 53 ° -62 ° 21.64 49 ° -57 ° 19.95 46 ° -53 ° 18.17 42 ° -49 ° 15.77 38 ° -46 ° 14.17 35 ° -42 ° 11.87 32 ° -39 ° 11.87 28 ° -36 ° 8.16 24 ° -32 ° 6.16 21 ° -28 ° 4.34 18 ° -25 ° 2.19 14 ° -21 ° 0.38 10 ° -18 °
  • Another such swirl body is characterized in that the diameter of the base body is 6 mm and the inclination of the swirl channels relative to the central axis is selected as a function of the total area of the swirl channels according to the table below: Area of the swirl channels in [mm 2 ] Angular inclination ( ⁇ ) in [°] 11.72 38 ° -46 ° 9.77 35 ° -42 ° 7.66 32 ° -39 ° 5.94 28 ° -36 ° 3.87 24 ° -32 ° 1.99 21 ° -28 ° 0.38 18 ° -25 °
  • each swirl channel advantageously has a depth of between 0.5 mm and 1.5 mm, measured in the radial direction.
  • the optimal depth of the swirl channels depends in particular on the exact type and size of the respective conical nozzle. At least some of the surfaces delimiting a swirl channel are expediently curved.
  • At least one collecting groove can be formed in one or each conical end face of the swirl body, which, starting from the free axial end region of the respective conically tapering end section, runs in the direction of a swirl channel and opens into it.
  • a collecting groove is advantageous because it supports the drainage of liquid in the direction of the openings at the ends of the swirl channels and into them.
  • the collecting groove can run in the direction of the swirl channel and open into it.
  • the collecting groove expediently winds in a spiral shape around the respective conically tapering end section.
  • the collecting groove may run along any other route in the direction of the swirl channel.
  • a collecting groove in each case a swirl channel opens.
  • the one collecting groove or the plurality of collecting grooves are preferably milled into the respective conical end face.
  • a conical nozzle with a nozzle housing and a swirl body such as, for example, the swirl body described above.
  • the swirl body is arranged within the nozzle housing, the nozzle housing having an outlet chamber with an outlet opening and the outlet chamber being located downstream of the swirl body, the swirl body having at least one conically tapering end section whose cone tip or truncated cone top surface points in the direction of the outlet chamber.
  • the dimensions of the at least one swirl channel can advantageously be selected in such a way that they are in a certain ratio to the dimensions of the outlet opening and, if present, to the diameter of a central longitudinal bore of the swirl body. In this way, in particular, a uniform spray pattern of the conical nozzle can be achieved.
  • FIGS. 1 to 4 show different schematic views of a swirl body 1 according to a first embodiment of the present invention, which can be used in particular in a cone nozzle, such as a full cone nozzle or a hollow cone nozzle, in order to set a fluid flowing through it in rotation.
  • the swirl body 1 has a cylindrical base section 2 which defines a cylindrical outer surface 3,
  • a conically tapering end section 8, 9 defining a cone-like end face 6, 7 is connected to both front ends 4, 5 of the base section 2.
  • the free axial ends of the end sections 8, 9 are each formed by a cone tip 10.
  • two swirl channels 11 of the same geometry, which run obliquely to a central longitudinal axis L of the swirl body 1 are formed diametrically opposite one another.
  • the swirl channels 11 each merge at the end from the base section 2 to the two end sections 8, 9 in order to open into the two conical end faces 6, 7. They are therefore open at the end and end in an area 12, 13 in which the respective end section 8, 9 merges into the base section 2.
  • the swirl channels 11 in this first embodiment therefore end far before the cone tips 10 of the end sections 8, 9.
  • Both swirl channels 11 have one Cross-section with a rectangular basic shape, the surfaces 14 delimiting the swirl channels 11 being designed to be slightly curved.
  • each swirl channel 11 has a depth, measured in the radial direction, of 1.0 mm. It should be clear that the swirl channels 11 can have any depth in another embodiment.
  • FIG. 5 shows a schematic side view of a swirl body 1 according to a second embodiment of the present invention.
  • the second embodiment differs from the first embodiment only in that in the second embodiment a collecting groove 15 is additionally formed in the conical end face 6, which, starting from the free axial end area 16 of the conically tapering end section 8, runs in the direction of one of the two swirl channels 11 and flows into this.
  • the collecting groove 15 winds spirally around the conically tapering end section 8. Even if the collecting groove 15 in the embodiment of FIG Figure 2 does not extend all the way to the end of the free axial end area 16, as a result of which the end section 8 has a conical tip 10, it is in principle also possible for the collecting groove 15 to extend to the end of the free axial end area 16.
  • the Figures 6 to 9 show different schematic views of a swirl body 1 according to a third embodiment of the present invention.
  • the third embodiment differs from the first embodiment only in that in the third embodiment the swirl body 1 additionally has a central central bore 17 which passes through the swirl body 1 coaxially to the central longitudinal axis L, which is why the end sections 8, 9 do not have a cone tip 10, but rather have a frustoconical shape.
  • the Figures 10 to 13 show different schematic views of a swirl body 1 according to a fourth embodiment not part of the present invention.
  • the fourth embodiment differs from the first embodiment in two points.
  • the two swirl channels 11 do not have a rectangular basic shape as in the first embodiment, but a triangular basic shape.
  • the surfaces 14 delimiting the swirl channels 11 are also curved in the fourth embodiment.
  • the swirl channels 11 do not end in an area 12, 13 in which the respective end section 8, 9 merges into the base section 2, as is the case in the first embodiment is.
  • the two swirl channels 11 open at the ends into the free axial end regions 16, 18 of the conically tapering end sections 8, 9.
  • the two swirl channels 11 in the fourth embodiment therefore extend significantly further in the direction of the free axial ends 10 of the end sections 8, 9 than this is the case in the first three embodiments.
  • the Figures 14 to 17 show different schematic views of a swirl body 1 according to a fifth embodiment not part of the present invention.
  • the fifth embodiment differs from the fourth embodiment only in that in the fifth embodiment the swirl body 1 additionally has a central central bore 17 which passes through the swirl body 1 coaxially to the central longitudinal axis L, which is why the end sections 8, 9 are not a cone tip 10, but rather have a frustoconical shape.
  • the Figure 18 shows a schematic sectional view of a cone nozzle 19 according to an embodiment of the present invention.
  • the conical nozzle 19 comprises a nozzle housing 20 with at least one elongated, upstream housing section 21 and an elongated, downstream housing section 22, the two housing sections 21, 22 being tubular and connected to one another at their facing ends so that they form a Define common flow channel 23 of conical nozzle 19. While the flow channel 23 is designed as a swirl chamber 25 in an end section 24 of the downstream housing section 22 adjoining the upstream housing section 21, in the end section 26 of the downstream housing section 22, which is opposite the end section 24, it is funnel-shaped in the direction of flow S. widened outlet opening 27 of the nozzle housing 20 over.
  • a swirl body 1 is located inside the swirl chamber 25 and is pressed into it. Downstream of the swirl body 1, the flow channel 23 is designed as an outlet chamber 28, which is located between the swirl body 1 and the outlet opening 27.
  • the swirl body 1 shown corresponds essentially to the swirl body 1 according to the first embodiment of the present invention.
  • the swirl body 1 has a cylindrical base section 2, with a conically tapering end section 8, 9 defining a cone-like end face 6, 7 adjoining each of the two end faces 4, 5 of the base section 2.
  • the cone tip 10 of the end section 8 points in the direction of the outlet chamber 28.
  • two swirl channels 11 of the same geometry, which run obliquely to a central longitudinal axis L of the swirl body 1 are formed diametrically opposite one another.
  • the swirl channels 11 each go at the end from the base section 2 to the two end sections 8, 9 over to open into the two conical end faces 6, 7.
  • the Indian Figure 18 The swirl body 1 shown differs from the first embodiment only in that, in the first embodiment, the base section 2 is shorter than in the first embodiment with the same width Figure 18 is trained.
  • swirl body 1 to be understood only as an example. Rather, any swirl body 1 according to the invention can be inserted into a conical nozzle 19, as shown in FIG Figure 18 is shown by way of example.
  • a liquid to be sprayed flows through the two swirl channels 11 of the swirl body 1, whereby a rotational flow is created.
  • the liquid set in rotation then exits the swirl channels 11, which are open at the ends, into the outlet chamber 28 and leaves the conical nozzle 19 from there via the outlet opening 27 of the nozzle housing 20 .
  • the liquid residues remaining inside the outlet opening 27 and / or the outlet chamber 28 after the end of the spraying process can, due to capillary forces and, depending on the position of the swirl body 1, also due to gravity, along the conical end face 6 of the downstream end section 8 and into the two in the swirl channels 11 opening into the cone-like end face 6 flow away. It is only through the conically tapering end section 8 that the liquid residues can flow off optimally. Thus, in the case of the conical nozzle 19 according to the invention, there are no undesired dead areas or dead spaces.
  • FIG. 19 to 22 an alternative sixth embodiment of a swirl body 1 according to the present invention is shown.
  • This is a swirl body 1, the base section 2 of which has a diameter of 6 mm and a height of 7.5 mm.
  • the tip angle ⁇ of the conical end sections 8.9 is approximately 118 °. This results in a relatively flat configuration of the swirl body 1 and here in particular of the base section 2.
  • the swirl channels 11 have a cross section which is produced by means of a milling cutter.
  • the swirl channels 11 have a semicircular end section 11a at their radially inner end, which is adjoined on the outside by a straight cross-sectional section 11b, the length of which, however, is relatively short and here is about 25% of the radius of the semicircular end section.
  • the angle of inclination a which the swirl channels 11 enclose with the central axis L of the swirl body 1, is relatively small, so that the upper end opening and the lower end opening of each swirl channel 11 superimpose one another in the circumferential direction, so that viewed from above in the axial direction of the swirl body 1 can look through the swirl channels 11.
  • the angle of inclination ⁇ is selected such that more than 60% of the lower end opening can be seen through the upper end opening. This way you can use the swirl body 1 generate fully conical spray patterns, although the swirl body 1 does not have an axial central bore.
  • the Figures 23 to 26 show a seventh embodiment of a swirl body 1 according to the present invention, which essentially corresponds to the embodiment described above. Only the diameter of the base region 2 is selected to be larger at 9 mm, but the height of 7.5 mm is retained. Furthermore, the cross section of the swirl channels 11 is selected to be almost semicircular, the spanned angular range being approximately 175 °. A straight cross-sectional section 11b as in the previous embodiment is missing.

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Claims (10)

  1. Corps de tourbillonnement (1) destiné à être utilisé dans une buse à cône plein pour mettre en rotation un fluide qui le traverse, avec une région de base cylindrique (2) qui définit une surface extérieure cylindrique (3), aux deux faces frontales (4, 5) de la partie de base (2) se raccordant chacune une région d'extrémité (8, 9) qui se rétrécit comiquement et définit une face frontale conique (6, 7), et, dans la surface extérieure cylindrique (3) du corps de tourbillonnement (1), deux canaux de tourbillonnement (11) de même géométrie, qui s'étendent obliquement par rapport à un axe central (L) du corps de tourbillonnement (1), étant formés avec un décalage uniforme le long de la circonférence du corps de tourbillonnement (1) et chaque canal de tourbillonnement (11) débouchant dans les deux faces frontales coniques (6, 7), les canaux de tourbillonnement (11) présentant une inclinaison constante sur leur longueur par rapport à l'axe central (L) de la région de base cylindrique (2) et l'inclinaison des canaux de tourbillonnement (11) étant choisie de telle sorte que les deux extrémités axiales ouvertes de chaque canal de tourbillonnement se chevauchent dans la direction circonférentielle et qu'ainsi une ouverture d'extrémité inférieure d'un canal de tourbillonnement (11) est visible lorsqu'on regarde axialement à travers l'ouverture d'extrémité supérieure du canal de tourbillonnement (11), caractérisé en ce que exactement deux canaux de tourbillonnement (11) sont formés dans la surface extérieure cylindrique (3) du corps de tourbillonnement (1) avec un décalage de 180° l'un par rapport à l'autre et débouchent chacun dans les deux faces frontales (6, 7), que l'angle d'inclinaison des canaux de tourbillonnement (11) est choisi de telle sorte que qu'au moins 70 % de l'ouverture d'extrémité inférieure du canal de tourbillonnement (11) est visible lorsqu'on regarde axialement à travers l'ouverture d'extrémité supérieure du canal de tourbillonnement (11), que les canaux de tourbillonnement (11) ont une section d'extrémité semi-circulaire (11a) à leur extrémité radialement intérieure et une section transversale droite (11b) qui se raccorde à la section d'extrémité semi-circulaire (11a) radialement sur l'extérieur, la longueur de la section transversale droite (11b) étant au plus égale à 30 % du rayon de la section d'extrémité semi-circulaire.
  2. Corps de tourbillonnement (1) selon la revendication 1, caractérisé en ce que l'angle au sommet des régions d'extrémité coniques (8, 9) est supérieur à 90°, en particulier supérieur à 100° et de préférence supérieur à 115° et en particulier est de 118°.
  3. Corps de tourbillonnement (1) selon l'une des revendications précédentes, caractérisé en ce que le rapport entre le diamètre de la région de base (2) et la longueur axiale du corps de tourbillonnement (1) est compris entre 0,6 et 1,5, en particulier entre 0,7 et 1,3 et de préférence entre 0,8 et 1,2.
  4. Corps de tourbillonnement (1) selon l'une des revendications précédentes, la longueur de la partie de section transversale droite (11b) est au plus égale à 20% et de préférence au plus égale à 10% du rayon de la section d'extrémité semi-circulaire (11a).
  5. Corps de tourbillonnement (1) selon l'une des revendications précédentes, caractérisé en ce que le diamètre du corps de base (2) est de 9 mm et l'inclinaison (α) des canaux de tourbillonnement (11) par rapport à l'axe central (L) est choisie en fonction de la surface totale des canaux de tourbillonnement (11) selon le tableau ci-dessous : Surface des canaux de tourbillonnement en [mm2] Inclinaison angulaire (α) en [°] 23,64 53°-62° 21,64 49°-57° 19,95 46°-53° 18,17 42°-49° 15,77 38°-46° 14,17 35°-42° 11,87 32°-39° 11,87 28°-36° 8,16 24°-32° 6,16 21°-28° 4,34 18°-25° 2,19 14°-21° 0,38 10°-18°
  6. Corps de tourbillonnement (1) selon l'une des revendications précédentes, caractérisé en ce que le diamètre du corps de base (2) est de 6 mm et l'inclinaison des canaux de tourbillonnement (11) par rapport à l'axe central (L) est choisie en fonction de la surface totale des canaux de tourbillonnement (11) selon le tableau ci-dessous: Surface des canaux de tourbillonnement en [mm2] Angle de l'inclinaison (α) en [°] 11,72 38°-46° 9,77 35°-42° 7,66 32°-39° 5,94 28°-36° 3,87 24°-32° 1,99 21°-28° 0,38 18°-25°
  7. Corps de tourbillonnement (1) selon l'une des revendications précédentes, caractérisé en ce qu'au moins une partie des surfaces (14) délimitant un canal de tourbillonnement (11) est courbe.
  8. Corps de tourbillonnement (1) selon l'une des revendications précédentes, caractérisé en ce que chaque canal de tourbillonnement (11), après sa transition de la région de base cylindrique (2) à chaque région d'extrémité conique (8, 9), se termine dans une zone (12, 13) où la région d'extrémité conique (8, 9) se fond dans la région de base cylindrique (2).
  9. Corps de tourbillonnement (1) selon l'une des revendications précédentes, caractérisé en ce qu'au moins une rainure collectrice (15) est formée dans une ou chaque face frontale conique (6, 7) du corps de tourbillonnement (1), en partant de la zone d'extrémité axiale libre (16, 18) de la région d'extrémité respective (8, 9) se rétrécissant de manière conique en direction d'un canal de tourbillonnement (11) et débouche dans celui-ci, et en particulier en ce que la rainure collectrice (15) s'enroule en spirale autour de la région d'extrémité respective (8, 9) se rétrécissant de manière conique.
  10. Buse conique (19) avec un boîtier de buse (20) et un corps de tourbillonnement (1) selon l'une quelconque des revendications 1 à 9, qui est disposé à l'intérieur du boîtier de buse (20), le boîtier de buse (20) présentant une chambre de sortie (28) avec une ouverture de sortie (27) et la chambre de sortie (28) étant située en aval du corps de tourbillonnement (1).
EP17739597.7A 2016-07-14 2017-07-14 Corps de turbulence ainsi que buse à jet conique dotée d'un tel corps de turbulence Active EP3302815B1 (fr)

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DE202016103825.1U DE202016103825U1 (de) 2016-07-14 2016-07-14 Drallkörper sowie Kegeldüse mit einem solchen Drallkörper
PCT/EP2017/067945 WO2018011427A1 (fr) 2016-07-14 2017-07-14 Corps de turbulence ainsi que buse à jet conique dotée d'un tel corps de turbulence

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WO2019084633A1 (fr) * 2017-11-03 2019-05-09 Rivus Ood Buse pour économie d'eau
FR3096280B1 (fr) * 2017-11-06 2023-09-15 Lindal France Buse en deux pièces pour diffuseurs d’aérosol
DE102021122710A1 (de) * 2021-09-02 2023-03-02 Alfred Kärcher SE & Co. KG Treibdüse und flächenreinigungskopf mit einer treibdüse
CN113975691A (zh) * 2021-11-15 2022-01-28 应急管理部天津消防研究所 一种复合雾化型喷头

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US6394366B1 (en) * 2000-10-27 2002-05-28 Spraying Systems Co. Spray nozzle assembly
EP2540400A1 (fr) * 2011-07-01 2013-01-02 Lechler GmbH Pulvérisateur à cône plein

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DD253144A3 (de) * 1985-08-29 1988-01-13 Inst F Getreide Verarbeitung V Duese zur zerstaeubung von fluessigkeiten
EP0604741B1 (fr) * 1987-12-11 1998-05-13 Deutsches Zentrum für Luft- und Raumfahrt e.V. Buse à tourbillonnement pour pulvériser un liquide
DE9411591U1 (de) * 1994-07-16 1995-11-09 Zapf, Walter, Monte Carlo Vorrichtung zur Erzeugung kontaktintensiver Strömung
WO2014102909A1 (fr) * 2012-12-25 2014-07-03 新日鐵住金株式会社 Buse de pulvérisation en cône plein
US9625146B2 (en) * 2014-07-11 2017-04-18 Delavan Inc. Swirl slot relief in a liquid swirler
DE202015001520U1 (de) 2015-02-24 2015-04-23 Lechler Gmbh Vollkegeldüse

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US6394366B1 (en) * 2000-10-27 2002-05-28 Spraying Systems Co. Spray nozzle assembly
EP2540400A1 (fr) * 2011-07-01 2013-01-02 Lechler GmbH Pulvérisateur à cône plein

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WO2018011427A1 (fr) 2018-01-18
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