Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
  • B24C3/00—Abrasive blasting machines or devices; Plants
  • B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
  • B24C3/10—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
  • B24C3/12—Apparatus using nozzles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
  • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
  • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
  • B05B3/025—Rotational joints
  • B05B3/026—Rotational joints the fluid passing axially from one joint element to another
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
  • B08B3/02—Cleaning by the force of jets or sprays
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
  • B24C3/00—Abrasive blasting machines or devices; Plants
  • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
  • B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
  • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
  • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
  • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member
  • B05B3/1021—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with individual passages at its periphery

Definitions

• the invention relates to a device for producing a liquid or liquid-based high-pressure jet, comprising a motor-driven rotor having at least one pressure line having a radial extent and having an outlet opening and comprising a feed line arranged centrally with respect to the axis of rotation of the rotor.
• Such devices are used for example for generating an extinguishing agent jet or for generating a Abcurisstrahls.
• the high-pressure jet produced serves to release substance adhering to the surface of a body to be cleaned or objects adhering thereto.
• the cleaning takes place as a result of the directed to the surface to be cleaned O high-pressure jet by mechanical means.
• a cleaning device is known from WO 2005/095057 A1.
• the cleaning equipment described and referred to in this document has a rotor called a nozzle bar with at least two pressure lines opposite each other with respect to its axis of rotation and extending radially outward from the axis of rotation of the nozzle bar.
• Formed on the nozzle bar is a hollow shaft.
• the hollow shaft is rotatably mounted and connected to a rotary feedthrough.
• the rotary feedthrough is connected with its other side to a supplied by a high pressure pump supply line.
• the rotor of this known system either by the pressure generated by the high-pressure pump and by an inclined orientation of the longitudinal axis of the outlet openings of the pressure lines and then due to the recoil force or by an additional motor drive.
• Extinguishing devices for generating a rotating high-pressure jet are basically constructed in the same way as the above-described cleaning system.
• the pressure of the generated jet of such a device as described above is dependent on the pressure provided by the high pressure pump for supplying the liquid.
• very powerful high pressure pumps are needed.
• rotary feedthroughs must be designed to withstand the pressure provided by the high-pressure pump, which in turn makes particularly high demands on the tightness of Dreh be manufacturedun- gene. To ensure a sufficient tightness, it is necessary that the seals used with appropriate bias applied to the respective moving element. These rotary unions are therefore susceptible to wear.
• such a design of the rotary feedthrough requires that a certain force is required so that the two rotatably mounted against each other elements of such a rotary feedthrough can be moved against each other. This causes friction losses in the desired rotation of the rotor.
• the invention is therefore based on the object to propose a device for generating a rotating high-pressure jet, with which the to
• the supply line for supplying the liquid to the rotor or the at least one pressure line associated with the rotor is arranged in a rotationally coupled manner with respect to the rotor.
• the torsionally coupled supply line is guided to the rotor and projects with its outlet opening into an input chamber of the rotor.
• the supplied liquid for example, the supplied water can be fed virtually without pressure to the rotor, which is due to the rotational decoupling of the supply line relative to the rotor readily possible.
• the at least one pressure line of the rotor opens with its inlet opening into the inlet chamber of the rotor. Usually one will equip the rotor with a plurality of, each with the same angular distance arranged pressure lines.
• the rotor itself is driven by a motor. Due to the radial extent of the pressure lines, a pressure is built up in them as a function of the centrifugal force in accordance with the rotational speed of the rotor, with the result that the liquid can emerge at the outlet opening of the pressure lines with the corresponding pressure. As a result of the rotational decoupling of the supply line, this basically does not rotate when the rotor is driven. In this device, a pressurization of the liquid takes place only within each individual pressure line. Since the pressure generation is a consequence of the rotation of the rotor, it needs to generate pressure - A -
• the power required to drive the rotor for generating a high-pressure jet is significantly lower compared to the power required to build up the same pressure with a high-pressure pump.
• the liquid supplied to the rotor does not need to be free of debris. Rather, depending on the intended use of the high-pressure generating device, the latter can be mixed with an abrasive substance if the device is used as a cleaning device, for example in the context of a descaling system.
• the rotation of the at least one outlet opening of the rotor takes place in a constant or at least approximately constant distance to the surface to be cleaned. This ensures that the cleaning jet impinging on the surface to be cleaned is the same regardless of the position of the at least one outlet opening within one revolution of the rotor. As a result, the effective area of the Abcurisstrahles is increased.
• the pressure conduit may also be formed of a space bounded by a top and a bottom.
• a flat jet is produced in such a rotor. If the surfaces of the upper part and the lower part bordering this space are arranged at right angles to the axis of rotation of the rotor, a disk-shaped surface jet is formed. Are the surfaces forming the pressure line of the rotor inclined to the axis of rotation, creates a cone or frustoconical high pressure jet.
• the term "pressure line" used in the context of these embodiments is also understood to mean one which is formed by a space which extends concentrically with respect to the axis of rotation of the rotor.
• the suitably designed as a pipe feed line which projects with its outlet opening into the input chamber of the rotor, is arranged centrally to the axis of rotation of the rotor.
• the supply line thus opens into the rotor at the point at which the rotational speed is the smallest. Consequently, there is no or only a very low pressure in the region of the axis of rotation of the rotor and in particular in its inlet chamber.
• a sealing of the rotor with respect to the torsionally coupled supply line is therefore possible by simple means.
• the supplied liquid is only at low pressure, for example only with the liquid column caused by the supply line. Ultimately, this pressure only needs to be so great that the liquid supplied via the supply line can flow into the pressure lines of the rotor.
• the pressure conditions within the input chamber of the rotor and thus the pressure acting on a torsional seal also does not appreciably change during operation of the rotor at very high rotational speeds, for example 10,000 rpm, or more.
• a pressure generation is thus carried out in this device only after the liquid has passed the rotary feedthrough. Operation of the rotor at high speeds allows the formation of a rotating high-pressure jet even at pressures which could not be provided by high pressure pumps or only with high performance pumps. For this reason, this device is particularly suitable as a cleaning device for cleaning a surface by means of a liquid or liquid-based cleaning agent blasted onto the surface.
• the exiting high-pressure jet has an admixture of a substance or mixture of substances.
• substance admixtures may be, for example, solid particles, through which the abrasive action of the high-pressure jet can be increased.
• a supply of such a substance can be carried out, for example, by arranging a feed channel within the supply line which is rotationally coupled with respect to the rotor, if the substance to be added or the substance mixture to be added is to be supplied through this feed channel.
• one or more feed channels are arranged in the region of the outlet of a ring body deflecting the high-pressure jet formed by the pressure line.
• the diverting body serves to divert the high-pressure jet emerging from the pressure line in the direction of the surface to be cleaned.
• a supply of substances to be mixed with the high-pressure jet in the region of the outlet of the deflecting body has the advantage, above all with the use of abrasive substances, that the wear of the surface of the deflecting body is reduced.
• the deflection body can be rotationally coupled relative to the rotor. This is particularly expedient if the ring body has feed channels for feeding in additives.
• Fig. 1 a partially sectioned side view of an apparatus for generating a rotating high-pressure jet
• FIG. 2 shows a bottom view of the rotor of the device of Figure 1.
• FIG. 3 is a schematic sectional view of another device for generating a rotating high-pressure jet
• FIG. 4 shows a partial view of the inner surface of a deflecting body associated with the device of FIG. 4, FIG.
• FIG. 5 shows a device according to FIG. 3 according to a further embodiment and FIG 6 shows a partial view of the inner surface of a deflecting body assigned to the device of FIG. 5.
• a device 1 for producing a rotating high-pressure liquid jet is designed as a cleaning system for freeing annealed and / or hot-formed metal strips from the scale layer adhering thereto. Thus, it is in the system in which the device 1 is integrated, a Entzu matterssstrom. For the sake of clarity, a hood and a suction device are not shown in FIG.
• the device 1 for generating the desired high-pressure liquid jet for descaling a metal strip moved past the device 1 comprises a rotor 2 for producing a plurality of individual liquid jets emerging under a high pressure.
• a liquid for descaling water is used, to which an abrasive, for example, an abrasive suspension may be added if necessary.
• the rotor 2 is designed plate-like and has several, at the same angular distance from each other arranged pressure lines.
• Such a pressure line is shown in Figure 1 in section and designated by the reference numeral 3.
• the pressure line 3 is formed in the illustrated embodiment by a trained as an insert piece of pipe 4, which is bent in its radially outer region by 90 ° and at its free end has an outlet opening 5.
• the bend at the end of the pipe section 14 serves to deflect high pressure jet, so that the generated high pressure jets are directed to a surface to be cleaned.
• a curvature of 90 ° as provided in the illustrated embodiment, also bends with other bending amounts can be provided.
• Such an angling in the radially outer region of the pressure lines or the pipe sections 4 will be provided depending on the object to be cleaned. If, for example, no bending is provided or even only a small one, the device 1 is suitable for cleaning the inner lateral surfaces of hollow bodies, for example pipes or the like.
• the outlet opening 5 is provided with an internal thread, so that in the outlet opening 5, not shown in the figures nozzle insert ⁇ in can be screwed.
• the individual pressure lines 3 of the rotor 2 are arranged in a star shape relative to the axis of rotation 6 of the rotor 2 that is perpendicular to the surface to be cleaned.
• the pressure lines 3 open on the input side into an input chamber 7 of the rotor 2.
• the input chamber 7 is arranged directly in the region of the axis of rotation 6.
• In the input chamber 7 is a centrally arranged to the axis of rotation 6 of the rotor 2 Leitkonus 8, whose axis is arranged in the axis of rotation 6 of the rotor 2.
• the rotor 2 is connected torque-tightly to a hollow shaft 9, which is mounted on a generally designated by the reference numeral 10 frame.
• the unit formed from the rotor 2 and the hollow shaft 9 is driven by an electric motor 1 1 via a drive belt 12.
• the drive device is designed so that the rotor 2 can rotate at high rotational speeds, for example at rotational speeds of 10,000-12,000 rpm.
• a feed tube 13 For supplying the liquid required for beam generation, for example water, a feed tube 13 is used, which is arranged in rotation with respect to the hollow shaft 9 within the hollow shaft 9.
• the feed tube 13 is fixed to the frame 10 with a liquid container 14.
• the output of the liquid container 14 acts on the input of the feed tube 13.
• the liquid container 14 serves for storing the liquid with which the high pressure jet emerging from the outlet openings 5 is to be produced.
• a liquid supply device not shown, ensures that the liquid level remains constant within the liquid container 14 during operation of the device 1.
• another liquid connection for example a line, to proceed.
• the feed tube 13 passes through the hollow shaft 9 and protrudes with its outlet opening 15 into the inlet chamber 7 of the rotor 2.
• the outlet opening 15 of the feed tube 13 is located at a short distance above the tip of the guide cone 8.
• a rotary seal not shown in the figure arranged. This need only withstand a very low pressure, namely only by the in the feed tube 13 and the liquid K ⁇ itstank 14 formed corresponding to the water column.
• the vertical extent of the hollow shaft 9 upwards in the direction of the liquid container 14 makes it possible to arrange the seal in the upper end between the hollow shaft 9 and the feed tube 13, thus at a point where the pressure is even lower than in the region of the inlet chamber 7.
• the sealing arrangement not shown in the figures also prevents ambient air from entering the input chamber 7 of the rotor 2 through the gap located between the inner surface of the hollow shaft 9 and the outer surface of the feed tube 13 during operation of the device.
• outlet opening 15 of the supply line 13 is at a height so that the liquid emerging therefrom does not have to flow through a path directed exclusively parallel to the axis of rotation 6 of the hollow shaft 13 to reach the inlet openings of the pressure lines 3. Rather, a rotation of the rotor 2 favors the inflow of the supplied liquid into the pressure lines 3.
• the rotor 2 is constructed in several parts in the illustrated embodiment and includes an upper part 16 and a lower part 17.
• the upper part 16 is connected via a connecting flange 18 to the hollow shaft 9.
• the lower part 17 is screwed to the upper part 16, so that it can be removed from the upper part 16.
• the mutually facing surfaces of the upper part 16 and the lower part 17 have for receiving the pipe sections 4 groove-shaped recesses.
• the pipe sections 4 are fixed without play in the complementary grooves of the upper part 16 and the lower part 17.
• the pressure pipes forming the pipe sections 4 can be replaced with the lower part 17 removed.
• the tube pieces 4 are exposed to a certain degree of wear, especially in the region of their curvature. It is therefore expedient that the pipe sections 4 can be exchanged as wearing parts in such an operation of the device 1.
• the bottom view of the rotor 2 shown in FIG. 2 shows that the rotor 2 in the illustrated embodiment, three pressure lines 3, 3 ', 3 "and accordingly three outlet openings 5, 5', 5" has.
• the inlet chamber 7 and the guide cone 8 arranged therein serve for introducing the liquid supplied through the feed tube 13 into the inlet openings of the pressure lines 3, 3 ', 3 "or the tube sections 4 which open into the inlet chamber 7.
• the hollow shaft 9 and thus the rotor 2 connected to the hollow shaft 9 are set into a rotational movement about the axis of rotation 6 via the above-described drive.
• the pending in the feed tube 13 liquid moves in the course of rotation in the pressure lines 3, 3 ', 3 ", is accelerated in this according to the rotational speed of the rotor 2 with increasing distance from the axis of rotation 6 of the rotor 2 and thus pressurized, so that from the outlet openings, 5, 5 ', 5 ", are used in the typically accelerating nozzles, three rotating high pressure jets emerge.
• the greatest pressure prevails at the sections furthest from the axis of rotation 6, ie in the outlet openings 5, 5', 5", whose longitudinal axis is parallel to the axis of rotation 6 of the rotor 2 in the illustrated embodiment are arranged.
• the axis of the outlet openings 5, 5 ', 5 " can also be inclined to the axis of rotation 6 of the rotor 2. The inclination can be provided in the plane shown in Figure 1 or also in or against the direction of rotation of the rotor 2. Typically, one is at Provide a tilted axis of the outlet openings 5, 5 ', 5 “tilt this only at a small angle.
• the outlet openings 5, 5 ', 5 rotate at a constant distance to the surface to be cleaned,
• FIG. 3 schematically shows a further device 19 for generating a high-pressure jet.
• the device 19 is basically constructed like the device 1.
• the device 19 has a rotor 20 and a rotatably coupled to the rotor within a hollow shaft 21 thereof arranged feed pipe 22.
• the supply pipe 22 serves to supply the cleaning liquid, for example water.
• the feed tube 22 is connected in a manner not shown to a liquid source, such as a liquid container.
• a feed channel 23 is arranged within the feed tube 22.
• the feed channel 23 serves to supply as required solid particles, which are added in the input chamber 25 of the rotor 20 of the supplied liquid, for example, the water supplied.
• the solids supply increases the abrasive activity of the high-pressure jet produced. If the device 19 is one of a descaling unit, scale is supplied as solid.
• the rotor 20 of this embodiment is formed by a top 26 and a bottom 27. Between the upper part 26 and the lower part 27 is a disk-shaped space, which is the pressure line 28 of this embodiment.
• the upper part 26 is connected to the lower part 27 by individual webs of radial extent. These are not shown in FIG.
• a flat high-pressure jet is thus generated in the pressure line 28, which due to the rotational speed of the rotor 20, the supplied water, evenly distributed over the circumference of the pressure line 28, transported in the radial direction to the outside.
• the generated high-pressure jet can be addressed as a surface jet.
• the input chamber may also be part of the pressure line 28 and a guide cone, as described for the embodiment of Figures 1 and 2, is not absolutely necessary.
• the inlet opening of the pressure line 28 is indicated in Figure 3 by the reference numeral E.
• Di ⁇ outlet opening A of the pressure line 28 is arranged in the embodiment of Figure 3 in the radial direction facing outward.
• the outlet opening A of this embodiment also rotates at a constant distance from the surface to be cleaned. Ultimately, it is at the exit opening A as well as at the inlet opening E of the pressure line 28 to circumferential openings.
• the pressure line 28 has a nozzle-like cross-sectional constriction in the region of the outlet opening A o in a section shortly before.
• this bead can be realized by annular beads that encircle the axis of rotation, molded onto the lower side of the upper part 26 or the upper side of the lower part 27.
• the two beads lie directly opposite each other.
• a deflecting body 29 For deflecting this high-pressure jet generated by the pressure line 28 is used in the embodiment of Figure 3, a deflecting body 29.
• the deflecting body 29 is designed as a ring body and serves to deflect the high-pressure jet generated in the pressure line 28 in the direction of the surface to be cleaned. In the illustrated embodiment, a deflection takes place by about 90 °.
• the deflecting body 29 is rotationally coupled with respect to the rotational movement of the rotor 20.
• the deflection body 29 has an outer part 30, on the inner surface 31 of which the high-pressure jet emerging from the pressure line 28 is deflected in the direction of the surface to be cleaned. In the embodiment shown in Figure 3, the deflecting body 29 also has an inner part 32, which, however, is not necessarily required in principle.
• the deflecting member 29 is rotationally coupled by the rotational movement of the rotor 20, since in the illustrated embodiment, not only a deflection of the exiting high-pressure jet to be cleaned surface to take place, but also by the deflecting 29, the rotational speed of the high-pressure jet itself braked or also be directed in the direction of the surface to be cleaned off, so that the high-pressure jet emerging from the deflecting 29 meets with respect to its energy moment as perpendicular as possible to the surface to be cleaned.
• the deflection body 29 can also be actively driven, in particular at a slower rotational speed than the rotor 20 or with an opposite direction of rotation. Due to the rotationally coupled deflecting body 29 in relation to the rotor 20 rotating at high speed during operation of the device 19, the deflecting body 29 also has a protective function.
• the inner surface 31 of the outer part 30 of the deflection device 29 has a plurality of milled-in grooves 33, which are separated from each other by a narrow separating web 34 in the embodiment shown.
• the course of the grooves 33 is inclined, but may also be curved.
• the grooves 33 not only have the purpose of braking or redirecting the surface jet emerging from the pressure line 28 with respect to its rotational speed, but also of dividing the area jet into a plurality of individual discrete jets, thereby increasing the cleaning efficiency.
• FIG. 4 shows, in an enlarged view, the inner surface 31 of the outer part 30 of the deflecting body 29 with the grooves 33 introduced therein and the webs 33 separating the grooves 33.
• the ends of the webs 34 facing the direction of flow divide the supplied high-pressure liquid jet are suitable.
• FIG. 5 shows a further device 35 for generating a high-pressure jet.
• the device 35 is in principle constructed like the device 19 and differs from this in that 36 feed channels 37 are introduced for supplying solid particles in the deflecting body.
• the supply channels 37 pass through the outer part 38 of the deflection body 36 and open in the region of the output of the grooves 39 in the grooves 39.
• solid particles especially those with abrasive properties, such as scale these are added to the high-pressure jet generated in this embodiment only . if this no longer or as good as no longer has to be deflected and thus already has its direction on the surface to be cleaned off. As a result, the wear of the inner surface of the deflecting body 36 is minimized.
• Figure 6 shows an enlarged Dar- position of the inner surface of the outer part 38 of the deflecting 36. From this, the arrangement of the feed channel 37 and the mouth in the grooves 39 can be seen. During operation of the device 35, due to the arrangement of the feed channels 37, a negative pressure is generated in them, so that solid particles present therein are automatically drawn into the deflected high-pressure liquid jet in the manner of an ejector pump. Also in the device 35, if desired, a nozzle-like taper can be arranged in the region of the outlet of the pressure line of the rotor.
• the device according to the invention is described with reference to a descaling system, it is likewise suitable for generating rotating high-pressure jets for a very wide variety of applications, for example also in connection with fire-extinguishing devices.
• the design of the rotating jet can be adapted to the particular desired application depending on the extent and orientation of the pressure lines, the angle of their outlet openings and / or the nozzles used. LIST OF REFERENCE NUMBERS

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Nozzles (AREA)
• Cleaning By Liquid Or Steam (AREA)
• Jet Pumps And Other Pumps (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Fluid-Pressure Circuits (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=36710266

Family Applications (1)

Country Status (5)

Families Citing this family (4)

Family Cites Families (6)

• 2006
  • 2006-04-25 DE DE202006006572U patent/DE202006006572U1/de not_active Expired - Lifetime
• 2007
  • 2007-04-24 EP EP07728451A patent/EP2012970B1/fr not_active Not-in-force
  • 2007-04-24 AT AT07728451T patent/ATE494987T1/de active
  • 2007-04-24 ES ES07728451T patent/ES2359747T3/es active Active
  • 2007-04-24 WO PCT/EP2007/053995 patent/WO2007122236A1/fr active Application Filing
  • 2007-04-24 DE DE502007006244T patent/DE502007006244D1/de active Active

Non-Patent Citations (1)

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