EP1384515A1 - Potentialausgleichsanordnung für einen elektrostatischen Rotationszerstäuber - Google Patents
Potentialausgleichsanordnung für einen elektrostatischen Rotationszerstäuber Download PDFInfo
- Publication number
- EP1384515A1 EP1384515A1 EP03016152A EP03016152A EP1384515A1 EP 1384515 A1 EP1384515 A1 EP 1384515A1 EP 03016152 A EP03016152 A EP 03016152A EP 03016152 A EP03016152 A EP 03016152A EP 1384515 A1 EP1384515 A1 EP 1384515A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- potential
- arrangement according
- bearing
- bearing unit
- 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.)
- Granted
Links
- 239000007787 solid Substances 0.000 claims 1
- 239000003973 paint Substances 0.000 abstract 1
- 239000011295 pitch Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000009760 electrical discharge machining Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0415—Driving means; Parts thereof, e.g. turbine, shaft, bearings
Definitions
- the invention relates to a potential equalization arrangement for an electrostatic rotary atomizer according to the preamble of claim 1.
- the invention has for its object to provide an arrangement, the permanently reliable and not due to maintenance errors endangered equipotential bonding between the shaft and the storage unit of an electrostatic rotary atomizer guaranteed.
- the equipotential bonding can be wear-free and easier as before, since the invention without the hitherto used as an additional component contact ring as even without a manually adjustable electrode.
- the Transfer of electrical charges can be solely by the special Surface structure with pointed elements between the Shaft and the desired potential supplying part of the storage unit be effected.
- the pointed elements are e.g. from thread-like about the outer surface of the shaft part and / or order the inner surface of the bearing part extending edges, so it not to the typical for point discharges wear caused by unwanted spark erosion.
- the edges of the two threads are each point-like adjacent to points with the rotation of the wave.
- the electrical discharge takes place here at the crossing points the different or opposite oblique thread instead, since the radial distance is the lowest here, and because of the continuous displacement of the crossing points Wear-free point discharge is possible.
- At least on one of the two opposite ones Surfaces can also be circular without gradient be. If edges are only on one surface, should it be to generate a corona discharge to the negative charged surface act. By the way, it may be enough if the edges only from individual, not extending over 360 ° Segments exist.
- Fig. 1 the storage unit of an electrostatic rotary atomizer shown, whose rotating bell plate (not shown) in a known manner in the in the drawing left end of a hollow shaft 1 can be screwed.
- the wave 1 is mounted in the housing part 2 of the storage unit, wherein the Air gap 3 between the shaft 1 and the cylindrical inner surface of the housing part 2 also in a conventional manner serves as an air bearing.
- the housing part 2 and the one with the bell plate connected part of the shaft 1 are subject to the operation of the Atomizer of electric charge by that of the electrodes the atomizer generated high voltage field, as by the Arrows 6 is indicated.
- the shaft 1 At its end facing away from the bell plate, the shaft 1 in a grounded at 5 equipotential bonding housing 4 of the storage unit stored and in turn grounded contactless.
- the shaft For contactless Earthing the shaft is its end part 1 'on the in the Housing 4 located part of its scope as shown provided with a thread whose pointed protruding edges. 8 the edges 9 of a similarly shaped internal thread in the cylindrical Face the inner surface of the housing 4.
- the radial Distance between the edges 8 and 9 of the two threads is so small that between them electrical discharges in Ensures the required for the desired equipotential bonding dimensions are as indicated by the arrows 7.
- Of the Air gap between the cylindrical end portion 1 'of the shaft 1 and the cylindrical bearing surface of the housing 4 should in the area the discharge path formed by the thread approximately the same size as the air gap 3 in the remaining area the shaft bearing.
- Fig. 2 which shows the course of the thread of the End part 1 'of the shaft with the edges 8 with respect to a settlement the cylindrical inner surface of the housing 4 with the thread edges 9 shows, the two threads have opposite one another Gradient directions (right- or left-hand thread).
- the edges 8 and 9 are not parallel, but crossing each other, it comes at the crossroads 10 to point discharges similar to needle points, but without the erosion effect of discharges at stationary points, since the crossing points 10 according to the wave rotation along wander both edge groups.
- the housing part 2 of the grounded equipotential housing 4 through an insulating layer 12 or other insulation to separate.
- the housing part 2 may be appropriate e.g. be grounded via a high-impedance resistor 13.
- the described embodiment can be in the context of Modify the invention in various ways.
- a possibility For example, one of the wave and / or from the grounded part of the bearing unit enclosing the shaft projecting flange as potential equalization arrangement serves.
- Another possibility is the use of a shaft, the only between the bell plate and the nearby Potential equalization arrangement electrically conductive, in Remaining, on the other hand, is insulating.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Nozzles (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
- Fig. 1
- eine schematische Axialschnittansicht der Wellenlagerung mit der Potentialausgleichsanordnung; und
- Fig. 2
- eine schematische Darstellung der Potentialausgleichsanordnung gemäß Fig. 1.
Claims (9)
- Potentialausgleichsanordnung für einen elektrostatischen Rotationszerstäuber, dessen Glockenteller im Bereich eines Hochspannungsfeldes rotiert oder auf Hochspannung gelegt wird, mit einer feststehenden Lagereinheit (2, 4) für die Welle (1) des Glockentellers,
mit einem auf ein festes Potential gelegten Teil (4) der Lagereinheit, in dem ein elektrisch leitendes Teil (1') der Welle (1) oder ein mit ihr elektrisch leitend verbundenes Teil rotiert,
und mit einer Einrichtung zur Übertragung elektrischer Ladung zwischen dem leitenden Teil (1') der Welle und dem potentialfesten Teil (4) der Lagereinheit,
dadurch gekennzeichnet, dass die Einrichtung zur Ladungsübertragung durch ein oder mehr von der Oberfläche des leitenden Teils (1') der Welle (1) und/oder von einer Oberfläche des potentialfesten Teils (4) der Lagereinheit vorspringende spitze Kanten (8,9) gebildet ist, die mindestens über ein Winkelsegment ring- oder spiralförmig um die Außenfläche des Wellenteils (1') und/oder um die Innenfläche des potentialfesten Lagerteils (4) verlaufen. - Potentialausgleichsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass die einander gegenüberstehend in der Außenfläche des Wellenteils (1') und in der Innenfläche des Lagerteils (4) gebildeten, wenigstens auf der einen Fläche spiralförmigen Kanten unterschiedliche Steigungsrichtungen haben, so dass die Kanten (8, 9) jeweils punktartig mit bei der Rotation der Welle (1) wandernden Punkten (10) benachbart sind.
- Potentialausgleichsanordnung nach Anspruch 2, dadurch gekennzeichnet, dass die Kanten (8, 9) zueinander entgegengesetzte Steigungen haben.
- Potentialausgleichsanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass spitze Kanten zumindest auf der negativ geladenen Oberfläche vorgesehen sind.
- Potentialausgleichsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass ein von der Welle und/oder von dem die Welle umschließenden potentialfesten Teil der Lagereinheit vorspringender Flansch zur Ladungsübertragung vorgesehen ist.
- Potentialausgleichsanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Welle (1) in einem Luftlager (3) gelagert ist, und dass in dem potentialfesten Teil (4) der Lagereinheit das dem Glockenteller abgewandte Ende (1') oder ein in der Nähe des Glockentellers befindlicher Teil der Welle rotiert und die vorspringenden spitzen Kanten (8, 9) sich in oder an dem zwischen der Welle (1) und der Lagereinheit gebildeten Luftlager befinden.
- Potentialausgleichsanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Spalt zwischen der Welle (1') und dem sie umschließenden potentialfesten Lagerteil (4) im Bereich der Einrichtung zur Ladungsübertragung (8, 9) wenigstens annähernd die gleiche Größe hat wie der das Luftlager der Welle (1) bildende Spalt (3) im übrigen Bereich der Lagereinheit oder kleiner ist.
- Potentialausgleichsanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der dem Glockenteller zugewandte Teil (2) der Lagereinheit von deren potentialfestem Teil (4) durch eine Isoliereinrichtung (12) getrennt und über einen hochohmigen Widerstand (13) auf das feste Potential gelegt ist.
- Rotationszerstäuber mit einer Potentialausgleichsanordnung nach einem der vorangehenden Ansprüche.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10233197A DE10233197A1 (de) | 2002-07-22 | 2002-07-22 | Potentialausgleichsanordnung für einen elektrostatischen Rotationszerstäuber |
DE10233197 | 2002-07-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1384515A1 true EP1384515A1 (de) | 2004-01-28 |
EP1384515B1 EP1384515B1 (de) | 2005-10-12 |
Family
ID=29796496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03016152A Expired - Lifetime EP1384515B1 (de) | 2002-07-22 | 2003-07-16 | Potentialausgleichsanordnung für einen elektrostatischen Rotationszerstäuber |
Country Status (5)
Country | Link |
---|---|
US (2) | US20040135016A1 (de) |
EP (1) | EP1384515B1 (de) |
AT (1) | ATE306329T1 (de) |
DE (2) | DE10233197A1 (de) |
ES (1) | ES2249663T3 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7898005B2 (en) * | 2002-12-09 | 2011-03-01 | The Regents Of The University Of California | Inorganic nanotubes and electro-fluidic devices fabricated therefrom |
US7136271B2 (en) * | 2003-03-17 | 2006-11-14 | Illinois Tool Works Inc | Static charge neutralizing assembly for use on rollers and shafts |
US8199453B2 (en) | 2003-03-17 | 2012-06-12 | Illinois Tool Works Inc. | Shaft current control brush ring assembly |
US7193836B2 (en) | 2003-03-17 | 2007-03-20 | Illinois Tool Works Inc | Grounding brush for mitigating electrical current on motor shafts |
US7339777B2 (en) | 2006-01-12 | 2008-03-04 | Illinois Tool Works Inc | Grounding system for a rotating shaft |
US20070278093A1 (en) * | 2006-06-02 | 2007-12-06 | Barnard Michael P | Electrical conductive contact ring for electroplating or electrodeposition |
US7520450B2 (en) * | 2006-10-10 | 2009-04-21 | Illinois Tool Works Inc. | Electrical connections for coating material dispensing equipment |
JP4347372B2 (ja) * | 2007-08-10 | 2009-10-21 | トヨタ自動車株式会社 | 静電塗装装置 |
US8421286B2 (en) * | 2008-07-03 | 2013-04-16 | Nidec Motor Corporation | Kit and method for attaching a grounding ring to an electrical motor |
US9917491B2 (en) | 2014-03-07 | 2018-03-13 | Nidec Motor Corporation | Ground ring and enclosure in an electric motor |
US9970481B1 (en) | 2017-09-29 | 2018-05-15 | Efc Systems, Inc. | Rotary coating atomizer having vibration damping air bearings |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4398672A (en) * | 1980-03-20 | 1983-08-16 | National Research Development Corporation | Electrostatic spraying |
EP0120648A2 (de) * | 1983-03-24 | 1984-10-03 | Nordson Corporation | Verfahren und Einrichtung zum induktiven Laden von zentrifugal zerstäubtem Beschichtungsmaterial |
EP0796663A2 (de) * | 1996-03-22 | 1997-09-24 | Dürr Systems GmbH | Rotationszerstäuber zum elektrostatisch unterstützten Beschichten von Gegenständen mit Farben bzw. Lacken |
EP0801991A2 (de) * | 1996-04-16 | 1997-10-22 | Toyota Jidosha Kabushiki Kaisha | Rotierende elektrostatische Sprühvorrichtung |
EP1118388A1 (de) * | 2000-01-15 | 2001-07-25 | Lac Tec GmbH Gesellschaft für moderne Lackiertechnik | Elektrostatischer Rotationszerstäuber |
Family Cites Families (28)
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US4286180A (en) * | 1978-07-20 | 1981-08-25 | Kollmorgen Technologies Corporation | Variable reluctance stepper motor |
JPS56115652A (en) * | 1980-02-19 | 1981-09-10 | Toyota Motor Corp | Method and device for rotary atomized electrostatic coating |
US4376135A (en) * | 1981-03-20 | 1983-03-08 | Binks Manufacturing Company | Apparatus for atomization in electrostatic coating and method |
DE3214314A1 (de) * | 1982-04-19 | 1983-10-20 | J. Wagner AG, 9450 Altstätten | Elektrostatische spruehvorrichtung |
GB8320827D0 (en) * | 1983-08-02 | 1983-09-01 | Sale Tilney Technology Ltd | Coating workpieces |
US4589597A (en) * | 1983-10-03 | 1986-05-20 | Graco Inc. | Rotary atomizer spray painting device |
CH668008A5 (de) * | 1985-04-30 | 1988-11-30 | H U Ramseier Fa | Elektrostatische pulverbeschichtungsanlage. |
US4684064A (en) * | 1985-08-19 | 1987-08-04 | Graco Inc. | Centrifugal atomizer |
DE3609240C2 (de) * | 1986-03-19 | 1996-08-01 | Behr Industrieanlagen | Vorrichtung zum elektrostatischen Beschichten von Gegenständen |
US4919333A (en) * | 1986-06-26 | 1990-04-24 | The Devilbiss Company | Rotary paint atomizing device |
DE3863562D1 (de) * | 1987-03-23 | 1991-08-14 | Behr Industrieanlagen | Vorrichtung zum elektrostatischen beschichten von werkstuecken. |
DE3720201C1 (de) * | 1987-06-16 | 1988-09-08 | Ransburg Gmbh | Spruehbeschichtungseinrichtung mit einer ringfoermigen Elektrodenanordnung fuer elektrisch leitfaehige Beschichtungsfluessigkeiten |
JPH0195269U (de) * | 1987-12-18 | 1989-06-23 | ||
US4927081A (en) * | 1988-09-23 | 1990-05-22 | Graco Inc. | Rotary atomizer |
DE3920981A1 (de) * | 1989-06-27 | 1991-01-10 | Ist Molchtechnik Gmbh | Rohrleitungsmolch |
US5078321A (en) * | 1990-06-22 | 1992-01-07 | Nordson Corporation | Rotary atomizer cup |
DE4121455C2 (de) * | 1991-06-28 | 1994-10-27 | Wagner Int | Einrichtung zum Speisen von Pulverbeschichtungsgeräten mit einem Pulver-Luft-Gemisch |
US5397063A (en) * | 1992-04-01 | 1995-03-14 | Asahi Sunac Corporation | Rotary atomizer coater |
US5633306A (en) * | 1992-12-03 | 1997-05-27 | Ransburg Corporation | Nonincendive rotary atomizer |
DE4306800C2 (de) * | 1993-03-04 | 1998-07-02 | Duerr Gmbh & Co | Beschichtungsvorrichtung mit einem Rotationszerstäuber |
US5300006A (en) * | 1993-07-02 | 1994-04-05 | Okuma Machine Tools Inc. | Automatic tool changer |
US5683032A (en) * | 1995-06-29 | 1997-11-04 | Ford Global Technologies, Inc. | Air measuring apparatus and method for paint rotary bell atomizers |
JP3322100B2 (ja) * | 1995-11-09 | 2002-09-09 | 日産自動車株式会社 | 回転霧化静電塗装装置 |
US6202945B1 (en) * | 1997-04-22 | 2001-03-20 | Kao Corporation | Method and apparatus for electrostatic powder coating |
DE19728155A1 (de) * | 1997-07-03 | 1999-01-07 | Lactec Gmbh | Verfahren und Vorrichtung zum Lackieren |
DE19805938A1 (de) * | 1998-02-13 | 1999-08-19 | Lactec Gmbh | Verfahren und Vorrichtung zum Beschichten von Teilen |
DE19959473A1 (de) * | 1999-12-10 | 2001-06-13 | Frederic Dietrich | Vorrichtung und Verfahren zum pneumatischen Fördern pulverförmiger Stoffe sowie Verwendung der Vorrichtung |
DE10059041C2 (de) * | 2000-11-28 | 2002-11-14 | Lactec Ges Fuer Moderne Lackte | Verfahren und Vorrichtung zum Fördern von elektrisch leitfähigen Lacken zwischen unterschiedlichen Spannungspotenzialen |
-
2002
- 2002-07-22 DE DE10233197A patent/DE10233197A1/de not_active Withdrawn
-
2003
- 2003-07-16 ES ES03016152T patent/ES2249663T3/es not_active Expired - Lifetime
- 2003-07-16 DE DE50301338T patent/DE50301338D1/de not_active Expired - Lifetime
- 2003-07-16 EP EP03016152A patent/EP1384515B1/de not_active Expired - Lifetime
- 2003-07-16 AT AT03016152T patent/ATE306329T1/de not_active IP Right Cessation
- 2003-07-22 US US10/624,259 patent/US20040135016A1/en not_active Abandoned
-
2006
- 2006-03-21 US US11/385,335 patent/US8840050B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4398672A (en) * | 1980-03-20 | 1983-08-16 | National Research Development Corporation | Electrostatic spraying |
EP0120648A2 (de) * | 1983-03-24 | 1984-10-03 | Nordson Corporation | Verfahren und Einrichtung zum induktiven Laden von zentrifugal zerstäubtem Beschichtungsmaterial |
EP0796663A2 (de) * | 1996-03-22 | 1997-09-24 | Dürr Systems GmbH | Rotationszerstäuber zum elektrostatisch unterstützten Beschichten von Gegenständen mit Farben bzw. Lacken |
EP0801991A2 (de) * | 1996-04-16 | 1997-10-22 | Toyota Jidosha Kabushiki Kaisha | Rotierende elektrostatische Sprühvorrichtung |
EP1118388A1 (de) * | 2000-01-15 | 2001-07-25 | Lac Tec GmbH Gesellschaft für moderne Lackiertechnik | Elektrostatischer Rotationszerstäuber |
Also Published As
Publication number | Publication date |
---|---|
ES2249663T3 (es) | 2006-04-01 |
ATE306329T1 (de) | 2005-10-15 |
US20060157597A1 (en) | 2006-07-20 |
US8840050B2 (en) | 2014-09-23 |
EP1384515B1 (de) | 2005-10-12 |
US20040135016A1 (en) | 2004-07-15 |
DE50301338D1 (de) | 2005-11-17 |
DE10233197A1 (de) | 2004-02-05 |
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