EP4444475A1 - Turbinenantrieb für einen rotationszerstäuber und zugehöriges betriebsverfahren - Google Patents
Turbinenantrieb für einen rotationszerstäuber und zugehöriges betriebsverfahrenInfo
- Publication number
- EP4444475A1 EP4444475A1 EP23709167.3A EP23709167A EP4444475A1 EP 4444475 A1 EP4444475 A1 EP 4444475A1 EP 23709167 A EP23709167 A EP 23709167A EP 4444475 A1 EP4444475 A1 EP 4444475A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- gas
- turbine
- nozzle
- drive gas
- 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
Classifications
-
- 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
- B05B3/1035—Driving means; Parts thereof, e.g. turbine, shaft, bearings
-
- 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
-
- 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
- B05B3/001—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements incorporating means for heating or cooling, e.g. the material to be sprayed
-
- 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
- B05B3/003—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with braking means, e.g. friction rings designed to provide a substantially constant revolution speed
Definitions
- the invention relates to a turbine drive for a rotary atomizer and a corresponding operating method.
- rotary atomizers that are driven by compressed air-driven turbines are usually used as application devices.
- a turbine is known, for example, from EP 1 388 372 Al.
- This known turbine has a rotatably mounted turbine wheel with numerous turbine blades which are arranged distributed over the circumference of the turbine wheel.
- the turbine blades are supplied with compressed air which emerges from several drive nozzles which are arranged distributed over the circumference of the turbine wheel.
- the turbine wheel can also be braked.
- brake air is delivered in the opposite direction from a brake nozzle to the turbine blades.
- the invention is therefore based on the object of creating a correspondingly improved turbine drive for a rotary atomizer.
- the invention is also based on the object of specifying a corresponding operating method for such a turbine drive.
- the invention is based on the fact that the turbine nozzles can only be optimized for a specific load point in terms of shape and nozzle cross section, so that the different load points that occur during operation of a rotary atomizer mean that the turbine is not always operated at its optimal load point.
- operating the turbine at a non-optimal load point results in a reduction in the efficiency of the turbine.
- Optimizing the turbine for exterior painting leads to relatively poor efficiency for interior painting.
- optimizing the turbine for interior painting results in relatively poor efficiency for exterior painting.
- the invention therefore provides that the turbine has different drive nozzles, which can be supplied with the respective drive gas (e.g. compressed air) from separate drive gas feeds, so that the different drive nozzles can be activated or deactivated independently of one another. Depending on the respective load point, one or the other drive nozzles can then be activated. This makes it possible to operate the turbine in an optimal operating state even with changing load points, thereby increasing the efficiency of the turbine with changing load points.
- the respective drive gas e.g. compressed air
- certain drive nozzles may be optimized for exterior painting while other drive nozzles are optimized for interior painting.
- those drive nozzles that are optimized for the exterior painting are then selected.
- those drive nozzles are specifically selected that are optimized for interior painting.
- the turbine drive according to the invention is designed for a rotary atomizer, as is known from the prior art and is described, for example, in EP 1 388 372 A1.
- the turbine drive according to the invention has a rotatable turbine wheel with a plurality of turbine blades.
- the turbine is designed as a radial turbine, but in principle there is also the possibility of designing it as an axial turbine.
- the turbine according to the invention in accordance with the known turbine described above, has at least two drive nozzles in order to flow a drive gas (e.g. compressed air) into the turbine blades of the rotatable turbine wheel in order to drive the turbine wheel.
- a drive gas e.g. compressed air
- the invention now provides that the different drive nozzles are supplied with the drive gas from different drive gas feeds, the drive gas feeds being separated from one another so that the drive nozzles can be supplied with the drive gas independently of one another.
- This makes it possible to select the most suitable drive nozzle depending on the respective load point of the turbine drive and to supply it with the drive gas, while the other drive nozzles are deactivated and are not supplied with the drive gas.
- the invention therefore enables a targeted selection and activation or deactivation of the individual drive air nozzles depending on the load point in order to optimize the efficiency of the turbine according to the load point.
- three different drive nozzles and three drive gas feeds are provided, which are separate from one another and can be operated independently of one another.
- the invention is not limited to a specific number with regard to the number of drive nozzles and separate drive gas feeds. More than three drive nozzles and correspondingly more than three drive gas feeds can also be provided.
- several groups of drive nozzles can also be provided, with the drive nozzles of the individual groups each being supplied with the drive gas (eg compressed air) through a common drive gas supply.
- a first group of drive nozzles can be optimized for exterior painting, while a second group of drive nozzles can be optimized for the interior painting optimized.
- the drive nozzles of one of the two groups are then selected and supplied with the drive gas, while the drive nozzles of the other group are then inactive.
- the various drive nozzles are preferably different, for example in terms of their nozzle shape and/or in terms of their nozzle cross section. This makes sense so that the most suitable drive nozzle for the flow to the turbine blades of the turbine wheel can be selected depending on the respective load point. It should also be mentioned that usually not just a single drive nozzle is selected. For example, several drive nozzles can be selected at the same time according to the respective load point.
- the individual drive nozzles can preferably have a convergent-divergent nozzle cross section. This means that the nozzle cross section first narrows convergently in the direction of flow and then widens divergently again, as is the case with a Laval nozzle, for example.
- the turbine wheel can also be braked by releasing a brake gas (e.g. compressed air) from a brake nozzle onto the turbine blades of the turbine wheel, the brake nozzle being aligned opposite to the at least one drive nozzle.
- a brake gas e.g. compressed air
- Such a brake nozzle is also preferably provided in the turbine drive according to the invention, which is preferably supplied with the respective brake gas (e.g. compressed air) from a brake gas supply via a brake gas control valve.
- the drive nozzles are supplied with the respective drive gas (e.g. compressed air) individually or in groups via separate drive gas supply lines.
- a drive gas control valve is preferably arranged in each of the individual drive gas supply lines, which can be designed, for example, as a proportional valve and is preferably controlled pneumatically.
- an electrical or other control is also possible.
- bistable spring element is arranged in at least one of the drive gas supply lines, which either releases or blocks the respective drive gas supply depending on its state.
- the bistable spring element is therefore a bistable valve, wherein the bistable spring element is preferably connected to the brake gas supply and changes its state in the event of a pressure pulse in the brake gas supply.
- bistable spring element can also be implemented with several drive nozzles, i.e. a bistable spring element can be arranged in each individual drive gas supply. However, there is then no efficient flow via the respective drive gas supply, since there is only a single brake gas supply.
- the turbine drive according to the invention can have a gas heater in order to heat the drive gas and / or the brake gas (e.g. compressed air) upstream of the drive nozzles or upstream of the brake nozzle, the gas heater preferably being arranged outside the rotary atomizer.
- the brake gas e.g. compressed air
- the gas heater only heats the drive gas in one of the drive gas feeds, while the drive gas in the other drive gas feeds is not heated by the gas heater.
- the gas heater heats the drive gas in several and preferably in all drive gas feeds.
- the gas heater can, for example, be arranged upstream of the at least one drive gas control valve. Alternatively, however, there is also the possibility that the gas heater is arranged downstream behind the at least one drive gas control valve.
- the turbine drive according to the invention preferably also has a turbine control which receives a load point on the input side, the load point determining the speed and/or the torque of the turbine drive. On the output side, the turbine control then controls the drive gas control valves depending on the load point. The turbine control specifically selects the drive nozzles that promise optimal turbine efficiency at the respective load point.
- the turbine control can open a different number of the drive gas control valves and close the remaining drive gas control valves.
- the turbine control can do more than just... select the most suitable drive nozzle, but also vary the number of selected drive nozzles according to the load point to increase the efficiency of the turbine.
- the turbine control can set one of the following operating states depending on the respective load point:
- the turbine drive according to the invention can have a plurality of drive gas shut-off valves in order to release or block the drive gas flows separately and independently of one another.
- a common drive gas proportional valve is preferably provided that serves to adjust the sum of the individual drive gas flows, with the drive gas proportional valve then being arranged upstream of the drive gas shut-off valves.
- the invention claims protection for the turbine drive described above, with the protection extending to both the individual turbine, the rotary atomizer with such a turbine and the turbine drive as a whole, which can also include the turbine control, the air heater and other components.
- the term of a turbine drive used in the context of the invention can therefore include the individual turbine, the rotary atomizer with such Designate a turbine or the complete turbine drive.
- Figure 1 shows a schematic representation of a turbine drive according to the invention for a rotary atomizer.
- Figure 2 shows a modification of Figure 1.
- Figure 3 shows a further modification of Figures 1 and 2.
- Figures 4A-4C show various views of a turbine according to the invention for a rotary atomizer.
- Figure 5 shows a schematic representation of a turbine drive according to the invention, which operates the turbine in an optimal operating range depending on the respective load point.
- Figure 6 shows a flow chart to illustrate the operating method according to the invention.
- Figure 7 shows a modification of a turbine drive according to the invention.
- Figure 8 shows a further modification of a turbine drive according to the invention.
- Figure 9 shows a modification of a turbine drive according to the invention with a bistable spring element.
- the turbine drive is used to drive a rotary atomizer 1, which is used to paint motor vehicle body components in a paint shop.
- the rotary atomizer 1 contains a turbine 2, which is largely of conventional design, as described for example in EP 1 388 372 A1, so that reference is also made to this publication.
- the turbine 2 has a rotatably mounted turbine wheel with numerous turbine blades which are arranged distributed over the circumference of the turbine wheel.
- the turbine blades of the turbine wheel can be supplied with compressed air from two drive nozzles 3, 4 in order to drive the turbine wheel and thus the rotary atomizer 1.
- the two drive nozzles 3, 4 are supplied with compressed air from a compressed air supply 8 via separate drive gas supply lines 5, 6 and an air heater 7, which can be referred to as a compressed air reservoir, compressed air compressor or pressure vessel.
- a drive gas control valve 9, 10 is arranged in each of the two drive gas supply lines 5, 6, which can control the drive gas flow to the individual drive nozzles 3, 4 independently of one another.
- the drive gas control valves 9, 10 are designed as proportional valves, which can be controlled pneumatically or electrically, for example.
- the two drive gas control valves 9, 10 can then be controlled independently of one another in order to control the two drive nozzles 3, 4 accordingly.
- the control is carried out in such a way that optimal efficiency of the turbine 2 is achieved depending on the respective load point.
- the turbine 2 has a brake nozzle 11, which makes it possible to brake the turbine wheel by blowing compressed air onto the turbine blades of the turbine wheel.
- the brake nozzle 11 is therefore aligned opposite to the two drive nozzles 3, 4.
- the brake nozzle 11 is supplied with compressed air via a brake gas supply 12 and a brake gas control valve 13.
- the exemplary embodiment according to FIG. 2 largely corresponds to the exemplary embodiment described above and shown in FIG. 1, so that to avoid repetition, reference is made to the above description, with the same reference numbers being used for corresponding details.
- a special feature of this exemplary embodiment is that the two drive gas control valves 9, 10 are arranged upstream in front of the air heater 7, whereas the two drive gas control valves 9, 10 are located downstream behind the air heater 7 in the exemplary embodiment according to FIG.
- a further special feature of this exemplary embodiment is that the air heater 7 only heats the compressed air in the drive gas supply 5, whereas the other drive gas supply 6 is guided around the air heater 7.
- the exemplary embodiment according to FIG. 3 largely corresponds to the exemplary embodiments described above and shown in FIGS. 1 and 2, so that to avoid repetition, reference is made to the above description, the same reference numbers being used for corresponding details.
- a special feature of this exemplary embodiment is that the air heater 7 enables separate and independent heating of the compressed air in the two drive gas feeds 5, 6.
- the compressed air in the drive gas supply 5 can be heated more than the compressed air in the other drive gas supply 6.
- FIGS 4A-4C show various views of a turbine 14 according to the invention, as is known in a similar form from EP 1 388 372 A1, so that reference is also made to this publication.
- the turbine 14 has a plurality of housing parts 15-18, which in the assembled state accommodate a turbine wheel 19 with a turbine shaft 20 and numerous turbine blades 21, the turbine blades 21 being arranged distributed over the circumference of the turbine wheel 19. From Figure 4C it can be seen that the individual turbine blades 21 of the turbine wheel 19 can be supplied with compressed air from three drive nozzles 22-24 in order to drive the turbine wheel 19, as is known from the prior art.
- the drive nozzles 22-24 are arranged in the housing part 16 and are designed differently in terms of number, nozzle cross-section and shape in order to enable adaptation to the respective load point of the turbine 14 by selecting the suitable drive nozzle 22-24.
- a brake nozzle 28 is also formed in the housing part 16 of the turbine 14, which is fed with compressed air from a brake gas supply 29.
- the brake nozzle 28 on the one hand and the drive nozzles 22-24 on the other hand are aligned oppositely depending on their function (drive or brakes).
- Figure 5 shows a schematic representation of a turbine drive according to the invention with three proportional valves 30-32 for controlling three drive nozzles, which are not shown here for simplicity.
- a brake valve 33 is shown to supply a brake nozzle with compressed air, although the brake nozzle is not shown here for simplicity.
- the proportional valves 30-32 and the brake valve 33 are controlled by a turbine control 34 depending on the respective load point in such a way that the turbine has the greatest possible efficiency.
- FIG. 6 shows a flowchart to explain the operating method according to the invention.
- a first step S1 the respective load point of the turbine, which is defined by torque and speed, is determined.
- the optimal combination of the drive nozzles and the amount of drive air for the load point is then determined.
- step S3 the proportional valves for the individual drive nozzles are then controlled according to the optimal combination.
- Figure 7 shows a schematic representation of a turbine drive according to the invention with three drive nozzles 35-37, which are supplied with compressed air via three separate drive gas feeds 38-40.
- a drive gas control valve 41-43 is arranged in each of the individual drive gas supply lines 38-40, so that the drive nozzles 35-37 are controlled independently of one another.
- the gas heater can be connected in separate chambers before or after.
- the drive gas supply lines 38-40 are brought together on the input side via a proportional valve 44 and are supplied with compressed air from a common compressed air supply 45.
- FIG. 8 shows a schematic representation of a turbine drive according to the invention, which largely corresponds to the exemplary embodiments described above, so that to avoid repetition, reference is made to the above description, the same reference numbers being used for corresponding details.
- a special feature of this exemplary embodiment is that the drive gas control valves 41-43 are proportional valves that are controlled pneumatically.
- Figure 9 shows a further exemplary embodiment of a turbine drive according to the invention, which also largely corresponds to the exemplary embodiments described above, so that to avoid repetition, reference is made to the above description, the same reference numbers being used for corresponding details.
- a special feature of this exemplary embodiment is that in one drive gas supply tion 6, a bistable spring element 46 is arranged, which is connected to the brake gas supply 12 and switches between two stable states in the event of a pressure pulse in the brake gas supply 12, namely between a first state in which the bistable spring element 46 blocks the drive gas supply 6 and a second state , in which the bistable spring element 46 releases the drive gas supply 6.
- the invention is not limited to the preferred embodiments described above. Rather, a large number of variants and modifications are possible, which also make use of the inventive idea and therefore fall within the scope of protection.
- the invention also claims protection for the subject matter and the features of the subclaims independently of the claims referred to in each case and in particular even without the features of the main claim. The invention therefore encompasses various aspects of the invention, which enjoy protection independently of one another.
Landscapes
- Control Of Turbines (AREA)
- Nozzles (AREA)
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022105999.5A DE102022105999A1 (de) | 2022-03-15 | 2022-03-15 | Turbinenantrieb für einen Rotationszerstäuber und zugehöriges Betriebsverfahren |
| PCT/EP2023/055198 WO2023174697A1 (de) | 2022-03-15 | 2023-03-01 | Turbinenantrieb für einen rotationszerstäuber und zugehöriges betriebsverfahren |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4444475A1 true EP4444475A1 (de) | 2024-10-16 |
| EP4444475B1 EP4444475B1 (de) | 2025-11-05 |
Family
ID=85477816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23709167.3A Active EP4444475B1 (de) | 2022-03-15 | 2023-03-01 | Turbinenantrieb für einen rotationszerstäuber und zugehöriges betriebsverfahren |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20250178005A1 (de) |
| EP (1) | EP4444475B1 (de) |
| JP (1) | JP2025509153A (de) |
| KR (1) | KR20240160117A (de) |
| CN (1) | CN118891108A (de) |
| DE (1) | DE102022105999A1 (de) |
| ES (1) | ES3055370T3 (de) |
| MX (1) | MX2024010582A (de) |
| PL (1) | PL4444475T3 (de) |
| WO (1) | WO2023174697A1 (de) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016062365A1 (de) * | 2014-10-22 | 2016-04-28 | Eisenmann Se | Hochrotationszerstäuber |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4425229A1 (de) | 1994-07-16 | 1996-01-18 | Abb Patent Gmbh | Verfahren und Vorrichtung zum Auftragen von Flüssiglacken auf Oberflächen |
| DE10115469A1 (de) | 2001-03-29 | 2002-10-10 | Duerr Systems Gmbh | Rotationszerstäuber und Verfahren zur Steuerung seiner Antriebsturbine |
| DE10233199A1 (de) | 2002-07-22 | 2004-02-05 | Dürr Systems GmbH | Turbinenmotor eines Rotationszerstäubers |
| DE10236017B3 (de) * | 2002-08-06 | 2004-05-27 | Dürr Systems GmbH | Rotationszerstäuberturbine und Rotationszerstäuber |
| US7967552B2 (en) * | 2004-09-03 | 2011-06-28 | Neil Edward Brett | Drive spindles |
| DE102015000551A1 (de) * | 2015-01-20 | 2016-07-21 | Dürr Systems GmbH | Rotationszerstäuberturbine |
-
2022
- 2022-03-15 DE DE102022105999.5A patent/DE102022105999A1/de active Pending
-
2023
- 2023-03-01 PL PL23709167.3T patent/PL4444475T3/pl unknown
- 2023-03-01 US US18/843,718 patent/US20250178005A1/en active Pending
- 2023-03-01 EP EP23709167.3A patent/EP4444475B1/de active Active
- 2023-03-01 WO PCT/EP2023/055198 patent/WO2023174697A1/de not_active Ceased
- 2023-03-01 KR KR1020247030642A patent/KR20240160117A/ko active Pending
- 2023-03-01 ES ES23709167T patent/ES3055370T3/es active Active
- 2023-03-01 MX MX2024010582A patent/MX2024010582A/es unknown
- 2023-03-01 CN CN202380027557.1A patent/CN118891108A/zh active Pending
- 2023-03-01 JP JP2024552014A patent/JP2025509153A/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016062365A1 (de) * | 2014-10-22 | 2016-04-28 | Eisenmann Se | Hochrotationszerstäuber |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240160117A (ko) | 2024-11-08 |
| DE102022105999A1 (de) | 2023-09-21 |
| US20250178005A1 (en) | 2025-06-05 |
| ES3055370T3 (en) | 2026-02-11 |
| CN118891108A (zh) | 2024-11-01 |
| WO2023174697A1 (de) | 2023-09-21 |
| MX2024010582A (es) | 2024-09-06 |
| PL4444475T3 (pl) | 2026-03-09 |
| JP2025509153A (ja) | 2025-04-11 |
| EP4444475B1 (de) | 2025-11-05 |
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