EP3140042B1 - Reinigungsgerät und zugehöriges betriebsverfahren - Google Patents

Reinigungsgerät und zugehöriges betriebsverfahren Download PDF

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Publication number
EP3140042B1
EP3140042B1 EP15723430.3A EP15723430A EP3140042B1 EP 3140042 B1 EP3140042 B1 EP 3140042B1 EP 15723430 A EP15723430 A EP 15723430A EP 3140042 B1 EP3140042 B1 EP 3140042B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
atomizer
trunk
nozzle
air
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.)
Active
Application number
EP15723430.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3140042A1 (de
Inventor
Michael Baumann
Sonja BRAUCHLE
Thomas Buck
Frank Herre
Georg M. Sommer
Sandra Schlichenmaier
Andreas Fischer
Peter Marquardt
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.)
Duerr Systems AG
Original Assignee
Duerr Systems AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Duerr Systems AG filed Critical Duerr Systems AG
Priority to PL15723430T priority Critical patent/PL3140042T3/pl
Publication of EP3140042A1 publication Critical patent/EP3140042A1/de
Application granted granted Critical
Publication of EP3140042B1 publication Critical patent/EP3140042B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B17/00—Accessories for brushes
    • A46B17/06—Devices for cleaning brushes after use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B05B15/555—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids discharged by cleaning 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
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
    • B08B1/12—
    • B08B1/32—
    • 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
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0421—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with rotating spray heads

Definitions

  • the invention relates to a cleaning device for cleaning a nebulizer, in particular a rotary atomizer. Furthermore, the invention relates to an operating method for such a cleaning device.
  • Rotary atomizers are usually used for painting motor vehicle body components, but they must be cleaned from time to time because excess paint mist ("overspray") can be deposited on the outside of the atomizer.
  • cleaning devices are used, as for example DE 10 2010 052 698 A1 .
  • WO 97/18903 A1 and DE 10 2006 039 641 A1 are known.
  • These known cleaning devices have a housing into which the atomizer to be cleaned is introduced for cleaning, wherein the atomizer is then sprayed within the housing of cleaning nozzles with a cleaning agent, wherein the cleaning agent may be a mixture of compressed air and cleaning liquid.
  • a disadvantage of the known cleaning devices is the relatively long cleaning time, which is not adapted to the transfer time (eg 15 seconds) of a paint shop, ie the time required for a change of the vehicle body to be painted to the old, already painted vehicle body numerorion from the spray booth and promote the new, unpainted motor vehicle body in the spray booth.
  • This is how the people to be painted become Motor vehicle bodies painted in succession in a paint shop, wherein the change time of a motor vehicle body, for example, 15 seconds.
  • the atomizer can not work anyway in the painting, so that the change time for a cleaning of the atomizer is available without the operation is stopped by it. It is therefore desirable to provide a cleaning device that requires a shorter cleaning time, which is at best smaller than the change time between the successive motor vehicle bodies.
  • the invention is therefore an object of the invention to provide a correspondingly improved cleaning device.
  • the invention initially provides, in accordance with the known cleaning devices described above, a wet cleaning station which has at least one cleaning nozzle in order to spray the atomizer with a cleaning fluid, wherein the atomizer is introduced into the wet cleaning station for cleaning.
  • the cleaning nozzle in the cleaning device according to the invention is not immobile, but has an elongated, rotatable cleaning trunk, which rotates in operation and at its free end has a nozzle opening through which the cleaning fluid is discharged.
  • the cleaning trunk preferably extends substantially coaxially with its axis of rotation.
  • the free end of the cleaning bowl is preferably slightly curved relative to the axis of rotation of the cleaning bowl, so that the cleaning fluid is sprayed in different directions depending on the rotational position of the cleaning bowl.
  • the point of impact of the cleaning fluid then passes over an annular path on the surface of the component to be cleaned.
  • the rotational movement of the cleaning spout and the associated change in direction of the cleaning fluid leads to an improved cleaning effect, which in turn allows a shortening of the cleaning time.
  • the cleaning time in the cleaning device according to the invention can be shorter than 30 seconds, 20 seconds, 15 seconds or even 10 seconds, without the quality of the cleaning suffers.
  • the rotating during operation cleaning trunk leads due to unavoidable imbalances of the cleaning spout to corresponding vibrations that are undesirable.
  • the cleaning brush according to the invention therefore preferably has a mass distribution and / or an outer contour which is substantially rotationally symmetrical with respect to the axis of rotation of the cleaning nozzle is to reduce the vibrations caused by the rotation of the cleaning spout.
  • the imbalance can therefore be minimized by design, by providing a rotationally symmetric mass distribution.
  • the cleaning trunk is balanced by appropriate trim weights are attached to the cleaning trunk, the mass and the attachment point of the trim weights are selected specifically so that the cleaning trunk is statically and / or dynamically balanced.
  • the cleaning device preferably has a speed controller to control the speed of the cleaning spout.
  • the speed regulator may be a centrifugal governor which, depending on the speed of the cleaning nozzle, derives a portion of the drive air intended for driving a turbine wheel.
  • the cleaning trunk is thus pneumatically driven by a turbine wheel, wherein the turbine wheel is impinged by drive air.
  • centrifugal governor then branches depending on the speed of the cleaning spout from a part of the input side supplied cleaning air, so that the diverted part of the cleaning air then no longer serves to drive the turbine wheel, resulting in a corresponding reduction of the drive torque of the turbine wheel and thus to a speed limit .
  • This idea of a centrifugal governor can also be implemented in a recoil drive of the cleaning spout, as will be described in detail.
  • the diversion of a portion of the drive air can be done for example via a sleeve, which rests on the outside of a through-flow of the drive air drive shaft and at Increasing speed Radial holes in the wall of the drive shaft releases, whereby a part of the drive air is discharged and then no longer serves to drive.
  • the sleeve is thus preferably connected rotationally with the drive shaft. The sleeve is therefore at low speeds of the cleaning spout sealingly on the radial bores in the wall of the drive shaft and seals them thereby, so that no drive air escapes through the radial bores.
  • the boot lifts off from the wall of the drive shaft due to centrifugal force, thereby releasing the radial bores in the wall of the drive shaft, so that some of the drive air can escape through the radial bores and is then not available for drive purposes ,
  • the collar of the centrifugal governor consist of several segments which are pressed by an elastic O-ring from the outside onto the lateral surface of the drive shaft.
  • the elastic O-ring thus presses the segments against the centrifugal force radially inwardly on the outer wall of the drive shaft, whereby the located in the outer wall of the drive shaft radial bores are sealed.
  • the centrifugal governor has a braking element which deforms as a function of the rotational speed and thereby generates a braking torque. With increasing speed, the brake element thus deformed such that the brake element bears against a fixed braking surface and thereby generates a braking torque.
  • a centrifugal governor is a recoil drive of the cleaning spout. This is about a cranked in the circumferential direction Tube ejected a fluid which generates a corresponding drive torque due to its recoil effect.
  • the tube may in this case be elastic and deform depending on the speed of the cleaning spout and the centrifugal force generated thereby, so that the ejection direction is speed-dependent. At low speed, the ejection tube is then hardly deformed and outputs the fluid exactly in the circumferential direction, whereby a maximum recoil and a maximum drive torque can be achieved.
  • the ejection tube deforms so that the ejection direction runs more and more in the radial direction, as a result of which the recoil effect decreases and only a smaller drive torque is produced, which leads to a corresponding speed limitation.
  • the cleaning nozzle constructive matches with a known cleaning nozzle, as for example in EP 2 522 435 A1 is described, so that the content of this patent publication of the present description in terms of the structural design and operation of the cleaning nozzle is fully attributable.
  • the cleaning nozzle thus preferably has a fixed funnel which surrounds the rotating cleaning nozzle.
  • the term of a funnel used in the context of the invention is preferably based on a housing which is open on the face side and widens toward its end face, preferably in a conical or convex manner.
  • the term of a funnel used in the context of the invention is to be understood generally and includes, for example, a cylindrical outer housing of the cleaning nozzle.
  • the rotating cleaning trunk preferably consists of a rigid material, so that the rotating cleaning trunk does not deform significantly during operation. This is advantageous because the cleaning bowl then does not hit the inner wall of the funnel regardless of the speed and the centrifugal force caused thereby.
  • the rotatable cleaning trunk widens toward its free end, in particular conically.
  • the cleaning trunk can widen conically with a cone angle of 5 ° -20 ° or 10 ° -15 ° towards its free end.
  • This conical expansion offers the possibility of a rotationally symmetrical mass distribution despite an unsymmetrical discharge of the cleaning fluid.
  • the cleaning trunk is preferably a longitudinal bore in which extend coaxially an outer tube and an inner tube.
  • the inner tube is preferably used to carry out a cleaning fluid (eg cleaning fluid), while the annular gap between the outer tube and the inner tube serves to convey compressed air.
  • the inner tube is therefore preferably connected upstream with a detergent feed line and downstream with a nozzle opening (outlet opening) at the free end of the cleaning spout.
  • the annular gap between the outer tube and the inner tube is preferably connected upstream with an air feed line and downstream with a nozzle opening (outlet opening) at the free end of the cleaning nozzle.
  • At the free end of the cleaning bowl so in the preferred embodiment of the invention is a mixture of the cleaning liquid and the compressed air discharged, resulting in a good cleaning effect.
  • the inner tube is preferably fixed against rotation at its upstream end.
  • the outer tube preferably rotates with the rotating cleaning trunk, which leads to a relative movement between inner tube and outer tube.
  • the outer tube is therefore preferably stiffer than the inner tube.
  • the nozzle opening of the cleaning nozzle is angled to the axis of rotation of the cleaning nozzle by a certain angle of inclination, so that the rotation of the cleaning nozzle leads to a continuous change in the emission direction, as already briefly mentioned above.
  • the angle of inclination relative to the axis of rotation of the cleaning spout is preferably in the range of 2 ° -30 °, 4 ° -20 ° or 5 ° -10 °, to name just a few examples.
  • the cleaning nozzle according to the invention preferably has a replaceable hose assembly, which includes the inner tube (and possibly the outer tube) and a clamping element, wherein the clamping element clamps the inner tube and is screwed by a screw in the cleaning nozzle.
  • a replaceable hose assembly which includes the inner tube (and possibly the outer tube) and a clamping element, wherein the clamping element clamps the inner tube and is screwed by a screw in the cleaning nozzle.
  • the cleaning device according to the invention preferably has a plurality of cleaning nozzles, which are distributed over the periphery with respect to the insertion direction of the atomizer and are preferably arranged equidistantly.
  • three cleaning nozzles can be arranged at an angular distance of 120 °.
  • the invention is not limited to three cleaning nozzles in terms of the number of cleaning nozzles, but also with a different number of cleaning nozzles feasible.
  • four cleaning nozzles distributed over the circumference can be arranged at an angular distance of 90 °.
  • the cleaning nozzles are arranged in a common plane, which is oriented at right angles to the insertion direction.
  • the cleaning nozzles are arranged in several planes, which are arranged one behind the other in the axial direction.
  • three cleaning nozzles can be arranged in two parallel planes.
  • the cleaning nozzles are offset in the individual planes to the cleaning nozzles in the respective adjacent plane in the circumferential direction. This staggered arrangement leads to a uniform spraying of the outer surface of the atomizer to be cleaned.
  • the cleaning nozzles can be arranged in a plane in each case centrally between the cleaning nozzles of the adjacent plane.
  • three cleaning nozzles can be arranged at 0 °, 120 ° and 240 °, while in a second plane three cleaning nozzles are arranged at 60 °, 180 ° and 300 °.
  • the wet cleaning station has a housing with an insertion opening to introduce the atomizer to be cleaned along the direction of insertion into the housing.
  • this insertion opening of the housing is sealed with a seal (eg sealing ring, O-ring).
  • the insertion opening may be sealed with a sealing air seal, the sealing air seal blowing sealing air over the insertion opening.
  • a sealing air seal is known per se from the prior art and, for example, in EP 1 367 302 A2 so that the content of this patent publication is fully attributable to the construction and operation of the sealing air seal of the present specification.
  • an inner tube is arranged, which is aligned coaxially with the insertion direction.
  • This inner tube serves to accommodate a bell cup of the atomizer to be cleaned for an internal flushing of the bell cup.
  • rinsing agent is passed through the nebulizer through the bell cup, which is then collected together with dirt residues from the inner tube.
  • the individual cleaning nozzles are angled with their emission direction at a certain angle of inclination to the direction of insertion of the atomizer.
  • This angle of inclination is preferably in the range of 20 ° -80 °, with a value of 60 ° has proven to be particularly advantageous.
  • the angle of inclination of the individual cleaning nozzles is preferably 90 °.
  • the angle of inclination of the individual cleaning nozzles can be easily changed by mounting another nozzle holder.
  • angle of inclination of the cleaning nozzles in the different levels of the cleaning nozzles may be different in order to optimize the cleaning effect.
  • the cleaning device according to the invention is preferably designed so that the cleaning distance is in the range of 10mm-50mm, with a value of 30mm for the cleaning distance has been found to be particularly advantageous.
  • the attachment of the cleaning nozzles according to the invention in the wet cleaning station and more precisely in the housing of the wet cleaning station is preferably carried out by means of a nozzle holder, the nozzle holder preferably allows a replaceable attachment of the individual cleaning nozzles.
  • the nozzle holder is vibration damping to reduce vibration transmission from the cleaning nozzles. This is advantageous because the rotating cleaning nozzle of the cleaning nozzles is not fully balanced in the rule and therefore transmits appropriate vibrations to the housing of the wet cleaning station.
  • the vibration-damping design of the nozzle holder in this case reduces the vibration transmission from the cleaning nozzles to the housing of the wet cleaning station.
  • a vibration damping elastomer component may be provided in the nozzle holder, for example an O-ring.
  • the nozzle holder preferably clamps the cleaning nozzle in a form-fitting manner, the nozzle holder having at least one screw for clamping the cleaning nozzle.
  • this screw is captive (self-locking) formed to avoid loosening of the screw despite the emanating from the cleaning nozzle vibrations.
  • the nozzle holder thus preferably allows a quick change of the cleaning nozzle by two captive screws.
  • the rotary drive for the rotating cleaning trunk can be done by at least one rotatable turbine wheel, which is pneumatically driven.
  • the turbine wheel in this case is flowed through radially from the inside to the outside, but other designs of turbine wheels are possible.
  • the turbine wheel internally has a plurality of openings for receiving the internally supplied drive air into the turbine wheel.
  • the openings in the turbine wheel then each open into a turbine chamber in the turbine wheel, wherein the individual turbine chambers each have an outlet opening which is aligned in the circumferential direction, which leads to a corresponding drive torque.
  • the cross-sectional area of the outlet openings of the individual turbine chambers is preferably in the range of 0.5 mm 2 -3 mm 2 .
  • the drive air is not simply discharged to the outside after flowing through the turbine wheel. Rather, the drive air is preferably after flowing through the turbine wheel as blocking air through blocking air nozzles in the annular gap between the fixed funnel and the rotating cleaning trunk dispensed.
  • This sealing air forms quasi an annular protective jacket for the inner bearings and thereby prevents overspray or other dirt from entering the bearings.
  • a plurality of turbine wheels which can be arranged axially one behind the other, can also be provided for driving the rotating cleaning nozzle. This can be useful, for example, to increase the drive power.
  • the cleaning bowl has at its free end an outlet opening which is aligned in the circumferential direction to drive the cleaning trunk by the recoil of the exiting cleaning fluid.
  • the cleaning spout may have at least one impeller to limit the speed of the cleaning spout by the flow resistance of the impeller.
  • the impeller can also be used to drive when the impeller is flowed accordingly.
  • the cleaning device preferably has a cleaning agent connection and a supply air connection, compressed air being supplied via the supply air connection, while a cleaning fluid (for example solvent) is supplied via the cleaning agent connection.
  • a cleaning fluid for example solvent
  • the supply air is then divided on the one hand in drive air for driving a turbine wheel in the cleaning nozzle and the other in cleaning air for Clean the atomizer.
  • the drive air is used to drive the turbine wheel and then as blocking air, as already described above.
  • the cleaning air however, only serves to clean the atomizer and is discharged together with the cleaning fluid to the atomizer to be cleaned.
  • the ratio of cleaning air to drive air may be, for example, 1: 1, 2: 1, 3: 1 or 4: 1, wherein a ratio of 2: 1 has proven to be advantageous.
  • the mass flow (volume flow or mass flow) of the cleaning fluid and the mass flow (mass flow or volume flow) of the supply air are preferably adjustable independently of one another. This offers the possibility that the driving torque for the cleaning brush and the energy of the cleaning air can be kept high while the amount of the cleaning fluid is reduced.
  • the amount of cleaning fluid is preferably adjusted centrally and uniformly for all cleaning nozzles of the cleaning device. This setting can be done for example via a pressure control valve, a throttle with exchangeable orifice or a needle valve.
  • the cycle time (cleaning time) may be changed (e.g., increased or decreased).
  • the cleaning nozzle rotates at a speed which is preferably in the range of 500 revolutions / minute to 30,000 revolutions / minute, wherein a speed range of 2,000 revolutions / minute to 8,000 revolutions / minute has proven to be advantageous.
  • the cleaning device is mounted stationary in a coating installation, for example on a grid at the bottom of a painting booth.
  • the cleaning device is movably mounted, for example, traveling on a movable painting robot.
  • This co-moving mounting of the cleaning device offers the advantage that the cleaning device is always in the immediate vicinity of the painting robot irrespective of the positioning position of the painting robot, so that the cleaning process can begin without a process of the painting robot, whereby the cleaning time is reduced.
  • the cleaning device according to the invention may also have a dry cleaning station for dry or semi-dry cleaning of the atomizer.
  • the dry cleaning station may include at least one cleaning brush to brush off the outside of the nebulizer.
  • the cleaning brush is annular and surrounds the atomizer during cleaning annular.
  • the dry cleaning station is preferably arranged outside the housing of the wet cleaning station.
  • the wet cleaning station is here along the insertion direction, preferably behind the dry cleaning station, so that the wet cleaning station cleans a front area of the atomizer while the dry cleaning station cleans a rear area of the atomizer.
  • the cleaning movement of the cleaning brush relative to the atomizer can be realized in various ways within the scope of the invention.
  • the cleaning brush is fixedly mounted, wherein the atomizer rotates about its longitudinal axis during the cleaning process in order to realize the relative movement between the cleaning brush and the atomizer.
  • the atomizer is held stationary during the cleaning process, while the cleaning brush rotates around the atomizer.
  • move both the cleaning brush and the atomizer during the cleaning process to realize the required relative movement between cleaning brush and atomizer.
  • the invention also includes a corresponding operating method, wherein the details of the operating method already apparent from the above description, so that is omitted to avoid repetition on a new description of the operating method.
  • a special feature of the operating method according to the invention may be that the atomizer after a cleaning process when pulling out of the cleaning device, the cleaning brush blows off with its shaping air to free the cleaning brush of adhering paint dust.
  • the atomizer can perform a tumbling motion when the steering air is switched on, for example.
  • FIG. 1 show an embodiment of a cleaning device according to the invention for cleaning a rotary atomizer 1 with a bell cup 2, wherein the cleaning device has a dry cleaning station 3 and a wet cleaning station 4.
  • the rotary atomizer is guided along an insertion direction 5 through an insertion opening 6 into a housing 7 of the wet cleaning station 4.
  • the dry cleaning station 3 is in this case outside the housing 7 of the wet cleaning station 4, i. above the wet cleaning station 4.
  • the dry cleaning station 3 therefore cleans a rear portion of the rotary atomizer 1, while the wet cleaning station 4 cleans a front portion of the rotary atomizer 1 with the bell cup 2.
  • the dry cleaning station 3 has an annular cleaning brush 8, which can be moved by a brush drive shown only schematically.
  • the brush drive 9 the Rotate annular cleaning brush 8 to the insertion direction 5, so that the cleaning brush 8 while the outside of the rotary atomizer 1 cleans.
  • the brush drive 9 can also move the cleaning brush 8 along the insertion direction 5, so that the cleaning brush 8 can cover almost the entire outer surface of the rotary atomizer 1.
  • the rotary atomizer guided by a multiaxial painting robot can be pulled out of the housing 7 of the wet cleaning station 4 and then perform a tumbling motion to blow off the annular cleaning brush 8 with its shaping air, thereby cleaning it.
  • the wet cleaning station 4 has at the top of the cup-shaped housing 7 a two-part lid with a lower lid part 10 and an upper lid part 11, wherein the two lid parts 10, 11 are fixedly connected to each other, for example by a screw.
  • the lower cover part 10, however, is connected by three clamping closures 12 with the housing 7.
  • the latches 12 allow a quick opening of the wet cleaning station 4, for example, for maintenance purposes.
  • a nozzle ring 13 of Blas Kunststoffdüsen that deliver blast air radially inward and thereby can blow dry the atomizer.
  • the wet cleaning station 4 has three cleaning nozzles 14, which are arranged distributed equidistant over the circumference.
  • the individual cleaning nozzles 14 each provide a compressed air-cleaning agent mixture along a radiation direction 15 on the outside of the rotary atomizer 1, wherein the emission direction 15 is angled with respect to the insertion direction 5 by an angle ⁇ 60 °.
  • the individual cleaning nozzles 14 are in this case mounted vibration-damped in the wall of the housing 7 of the wet cleaning station 4.
  • the individual cleaning nozzles 14 project through an opening in the wall of the housing 7 inwards and are fixed by an angle 16.
  • the angle 16 With a leg of the angle 16 engages in a groove 17 of the cleaning nozzle 14 and thereby fixes this form-fitting manner.
  • the angle 16 With its other leg, however, the angle 16 is on an elastic damping element 18 (spout) and is fixed by means of two captive screws 19.
  • the damping element 18 between the angle 16 and the housing 7 of the wet cleaning station 4 in this case provides a vibration decoupling, so that the vibrations emanating from the cleaning nozzles 14 are transmitted to the housing 7 of the wet cleaning station 4 only to a small extent.
  • this type of support of the individual cleaning nozzles 14 allows a quick and easy change of the cleaning nozzles.
  • the structure and operation of the individual cleaning nozzles 14 is in particular from the FIGS. 4 to 9 and will be described below.
  • the individual cleaning nozzles 14 each have an external, stationary funnel 20, which widens in a funnel shape towards its free end.
  • cleaning brush 21 In the hopper 20 a rotating during operation cleaning brush 21 is arranged, wherein the cleaning trunk 21 in operation a mixture of compressed air and cleaning agent (eg Solvent) to clean the outside of the rotary atomizer 1.
  • a mixture of compressed air and cleaning agent eg Solvent
  • the cleaning trunk 21 extends a longitudinal bore in which an inner tube 22 and an outer tube 23 extend.
  • the inner tube 22 serves to supply a cleaning agent (for example solvent), which is supplied via a detergent connection 24.
  • the annular gap between the inner tube 22 and the outer tube 23, however, serves to forward cleaning air, which is supplied via a supply air connection 25.
  • the rotatable cleaning brush 21 is screwed to a drive shaft 26, which is hollow and receives the inner tube 22 and the outer tube 23.
  • a sliding bearing 27 is arranged in the drive shaft 26, wherein the cleaning air flows through the sliding bearing 27 in the axial direction and can flow through radial bores 28 in the wall of the drive shaft to the outside in a turbine wheel 29.
  • the supply air supplied via the supply air connection 25 is thus divided into cleaning air and drive air.
  • the cleaning air flows through the annular gap between the inner tube 22 and the outer tube 23 to the front and is discharged at the free end of the cleaning spout 21.
  • the drive air flows through the radial bores 28 outwards into the turbine wheel 29 and thereby drives the turbine wheel.
  • the drive shaft 26 is rotatably mounted with the turbine 29 via two rolling bearings 30, 31 in a housing part 32.
  • the drive air exiting externally on the turbine wheel 29 then flows outward past the roller bearings 30, 31 to the front through holes in hollow grub screws 33 with holes and finally passes through sealing air nozzles 34 (see. FIG. 7 ) forward.
  • the blocking air nozzles 34 thus emit a barrier air curtain into the annular gap between the fixed hopper 20 and the rotating cleaning brush 21. As a result, the contamination of the rolling bearings 30, 31 is minimized.
  • the housing part 32 is in this case inserted into the proximal end of the funnel 20 and sealed by a sealing ring 35 with respect to the hopper 20.
  • the sealing ring 35 also prevents the release of the hopper 20 by vibrations.
  • the housing part 32 is inserted into a further housing part 36, the housing part 32 being sealed off from the housing part 36 by a further sealing ring 37.
  • the cleaning nozzle 14 still has a connection part 38 which can be tightened by a clamping screw 39 in the housing part 36, the connection part 38 having the detergent connection 24 and the supply air connection 25.
  • FIG. 6 Furthermore, it can be seen that the inner tube 22 and the outer tube 23 at the free end of the cleaning nozzle 21 open into a nozzle opening which emits the mixture of cleaning agent and compressed air in a specific emission direction 40.
  • the cleaning nozzle 21 rotates in this case about a rotation axis 41, wherein the emission direction 40 is angled relative to the rotation axis 41 by an angle ⁇ 10 °.
  • the inclination angle ⁇ has the consequence that the radiation direction 40 due to the rotation of the cleaning spout 21 continuously changes in operation and thereby covers a larger area.
  • FIG. 6 it can be seen that the cleaning nozzle 21 expands towards its free end with a cone angle ⁇ 20 °.
  • This has the technical purpose that a possible rotationally symmetrical mass distribution of the cleaning spout 21 is desired so that in spite of the rotation of the cleaning spout 21 as low as possible vibrations occur.
  • the additional mass in the cleaning nozzle 21 on the outlet opening of the inner tube 22 and the outer tube 23 opposite side thus serves to avoid an imbalance of the cleaning nozzle 21st
EP15723430.3A 2014-05-07 2015-05-04 Reinigungsgerät und zugehöriges betriebsverfahren Active EP3140042B1 (de)

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PL15723430T PL3140042T3 (pl) 2014-05-07 2015-05-04 Urządzenie czyszczące i odnośny sposób pracy

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DE102014006647.9A DE102014006647A1 (de) 2014-05-07 2014-05-07 Reinigungsgerät für einen Zerstäuber und zugehöriges Betriebsverfahren
PCT/EP2015/000907 WO2015169432A1 (de) 2014-05-07 2015-05-04 Reinigungsgerät und zugehöriges betriebsverfahren

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CN (1) CN106457275B (es)
BR (1) BR112016024430B1 (es)
DE (1) DE102014006647A1 (es)
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HU (1) HUE042596T2 (es)
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CN106457275B (zh) 2019-11-26
MX2016014422A (es) 2017-03-30
PL3140042T3 (pl) 2019-05-31
ES2715092T3 (es) 2019-05-31
BR112016024430A2 (pt) 2017-08-15
KR102337361B1 (ko) 2021-12-10
JP6812242B2 (ja) 2021-01-13
BR112016024430B1 (pt) 2021-03-30
US20170072421A1 (en) 2017-03-16
CN106457275A (zh) 2017-02-22
HUE042596T2 (hu) 2019-07-29
EP3140042A1 (de) 2017-03-15
MY191436A (en) 2022-06-27
WO2015169432A1 (de) 2015-11-12
DE102014006647A1 (de) 2015-11-12
KR20170028304A (ko) 2017-03-13
US10426253B2 (en) 2019-10-01
TR201901379T4 (tr) 2019-02-21
JP2017514682A (ja) 2017-06-08
PT3140042T (pt) 2019-02-27

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