Cleaning device and associated operating method

Patent metadata

Field	Value
Publication number	US-10426253-B2
Application number	US-201515309267-A
Country	US
Kind code	B2
Filing date	May 4, 2015
Priority date	May 7, 2014
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A cleaning device for cleaning an atomizer, in particular a rotary atomizer, is provided. The cleaning device includes a wet cleaning station having at least one cleaning nozzle for the wet cleaning of the atomizer with a cleaning fluid. The atomizer is introduced into the wet cleaning station in an introduction direction. The cleaning nozzle has a rotatable cleaning trunk for dispensing the cleaning fluid. The cleaning device, in some embodiments, also includes a dry cleaning station. A corresponding operating method is also provided.

First claim

The invention claimed is:

1. A cleaning device for an atomizer, comprising:
a wet cleaning station with a housing and at least one cleaning nozzle, the at least one cleaning nozzle having a cleaning trunk rotatable relative to the housing and a nozzle aperture within the housing, the at least one cleaning nozzle being configured to dispense a cleaning fluid from the cleaning trunk at the nozzle aperture,
wherein the housing is configured with an introduction aperture and to receive the atomizer therewithin through the introduction aperture and along an introduction axis, the at least one cleaning nozzle being configured to dispense the cleaning fluid on the atomizer disposed within the housing, and
wherein the cleaning trunk includes at least one counterweight, the at least one counterweight configured to balance the cleaning trunk about a rotational axis of the cleaning trunk.

2. The cleaning device according to claim 1 , wherein the cleaning trunk has a mass distribution and an external contour that is substantially rotationally symmetrical to a rotational axis of the cleaning trunk.

3. The cleaning device according to claim 1 , further comprising a speed controller coupled to the cleaning trunk, the speed controller being a centrifugal governor configured to dissipate a part of driving air intended for driving a turbine wheel for the cleaning trunk as a function of the rotational speed of the cleaning trunk.

4. The cleaning device according to claim 3 , wherein the centrifugal governor has a collar, which, on an outside surface thereof, abuts a driveshaft through which the driving air passes and, with increasing of the rotational speed, uncovers radial holes in a wall of the driveshaft, the radial holes configured to dissipate part of the driving air.

5. The cleaning device according to claim 1 , wherein an outer hose and an inner hose run coaxially within a longitudinal bore of the cleaning trunk, the inner hose being configured to fluidly couple a cleaning agent feed line to the nozzle aperture, an annular gap between the outer hose and the inner hose is configured to fluidly couple an air supply line and the nozzle aperture downstream at the free end of the cleaning trunk, the inner hose being rotatably fixed relative to the outer hose.

6. The cleaning device according to claim 5 , wherein the nozzle aperture is inclined at an angle to the rotational axis of the cleaning trunk.

7. The cleaning device according to claim 1 , further comprising a plurality of cleaning nozzles, the cleaning nozzles being equally radially distributed about the introduction axis.

8. The cleaning device according to claim 7 , wherein each of the plurality of cleaning nozzles is radially offset relative to the cleaning nozzles in adjacent planes of the plurality of planes.

9. The cleaning device according to claim 1 , further comprising an inner tube disposed in the housing and oriented coaxially to the introduction axis, the inner tube configured to receive a bell cup of the atomizer.

10. The cleaning device according to claim 1 , wherein the at least one cleaning nozzle is oriented to dispense cleaning fluid along a direction with an inclination with respect to the introduction axis between 20° and 85°.

11. The cleaning device according to claim 1 , further comprising
a nozzle mount coupled to the wet cleaning station, the nozzle mount configured to receive the at least one cleaning nozzle, the nozzle mount including vibration-damping material.

12. The cleaning device according to claim 1 , wherein the cleaning trunk has a circumferentially oriented outlet aperture configured to provide a rotation driving force from a thrust of dispensing cleaning fluid, the cleaning trunk including at least one vane positioned to resist a flow of the dispensing cleaning fluid.

13. The cleaning device according to claim 1 , wherein the at least one cleaning nozzle has at least one rotatable turbine wheel configured to pneumatically drive the cleaning trunk.

14. The cleaning device according to claim 13 , wherein a driving air flows outwardly onto the turbine wheel, the turbine wheel has a plurality of inner apertures on the inside to receive the driving air into the turbine wheel, the apertures in the turbine wheel each open into a turbine chamber, the turbine chambers each have a circumferentially oriented outlet aperture, and, after flowing through the turbine wheel, the driving air is dispersed through sealing air nozzles outside of the cleaning trunk.

15. The cleaning device according to claim 1 , further comprising a dry cleaning station outside of the housing of the wet cleaning station, the dry cleaning station including a cleaning brush, the cleaning brush being annular and configured to encircle the atomizer during cleaning.

16. The cleaning device according to claim 15 , wherein the wet cleaning station is arranged along the introduction direction downstream of the dry cleaning station, the wet cleaning station being configured to clean a front section of the atomizer while the dry cleaning station cleans a rear section of the atomizer.

17. A cleaning device for an atomizer, comprising:
a wet cleaning station with a housing and at least one cleaning nozzle, the at least one cleaning nozzle having a cleaning trunk rotatable relative to the housing and a nozzle aperture within the housing, the at least one cleaning nozzle being configured to dispense a cleaning fluid from the cleaning trunk at the nozzle aperture,
a speed controller coupled to the cleaning trunk, the speed controller being a centrifugal governor configured to dissipate a part of driving air intended for driving a turbine wheel for the cleaning trunk as a function of the rotational speed of the cleaning trunk,
wherein the housing is configured with an introduction aperture and to receive the atomizer therewithin through the introduction aperture and along an introduction axis, the at least one cleaning nozzle being configured to dispense the cleaning fluid on the atomizer disposed within the housing.

18. The cleaning device according to claim 17 , wherein the centrifugal governor has a collar, which, on an outside surface thereof, abuts a driveshaft through.

19. The cleaning device according to claim 18 , wherein the at least one cleaning nozzle has at least one rotatable turbine wheel configured to pneumatically drive the cleaning trunk.

20. The cleaning device according to claim 19 , wherein
a driving air flows outwardly onto the turbine wheel, the turbine wheel has a plurality of inner apertures on the inside to receive the driving air into the turbine wheel, the apertures in the turbine wheel each open into a turbine chamber, the turbine chambers each have a circumferentially oriented outlet aperture, and, after flowing through the turbine wheel, the driving air is dispersed through sealing air nozzles outside of the cleaning trunk.

Assignees

• Duerr Systems Ag

Inventors

• Baumann Michael
• Brauchle Sonja
• Buck Thomas
• Herre Frank
• Sommer Georg M
• Schlichenmaier Sandra
• Fischer Andreas
• Marquardt Peter

Classifications

• 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 · CPC title

• B05B15/52

  for removal of clogging particles · CPC title

• A46B17/06

  Devices for cleaning brushes after use · CPC title

• B05B15/555 Primary

  discharged by cleaning nozzles · CPC title

• B05B3/02 Primary

  with rotating elements (electric spraying discharge apparatus characterised by having rotary outlet or deflecting elements B05B5/04) · CPC title