ELECTROSTATIC SPRAYING ARRANGEMENT

• US 20100147215A1
• Filed: 09/26/2007
• Published: 06/17/2010
• Est. Priority Date: 09/27/2006
• Status: Active Grant

• Current Assignee: Durr Systems GmbH
• Original Assignee: Durr Systems GmbH
• Inventors: Martin, Herbert, Bieber, Erwin, Frey, Marcus, Herre, Frank, Haas, Juergen, Baumann, Michael, Nolte, Hans-Jurgen, Seiz, Bernhard, Block, Torsten, Krumma, Harry
• Granted Patent: US 8,485,125 B2
• Time in Patent Office: Days
• US Class Current: 118/621
• CPC Class Codes: B05B 5/0531 Power generators
• CPC Class Codes: B05B 5/10 Arrangements for supplying power, e.g. charging power in discharge apparatus B05B5/053

Abstract

A transformer arrangement is disclosed for an electrostatic sprayer or in an adjacent moving element of a coating machine. A transformer provides a galvanic isolation between the line arrangement provided for supplying power to the sprayer arrangement, and consumers at high voltage in the sprayer or possibly in the robot arm. This isolation may be provided with an isolating transformer which has a sufficient isolation distance or other isolation device between the primary and secondary circuits.

Claims

1. A sprayer arrangement for a coating machine for the serial electrostatic coating of workpieces, comprising:

an electrostatic sprayer including a device for charging the coating material to a predetermined voltage and which contains sprayer components, at least some of the sprayer components charged to the predetermined voltage during operation, and

a transformer arrangement which is connected to an external supply line and which is located at least partially within one of the sprayer a component of the coating machine,

wherein the transformer arrangement has includes one of;

a voltage isolation device between a primary circuit and a secondary circuit; and

a voltage isolation device is in a line arrangement, the line arrangement leadings from the transformer arrangement to the sprayer arrangement, and

wherein the transformer arrangement is connected to a valve control systems, the valve control system located in the sprayer arrangement and charged to the predetermined voltage, the transformer arrangement supplying electrical power to the valve control system.

2. The sprayer arrangement according to claim 1, further comprising a rotary sprayer including an electric drive motor for a rotating spraying element of the electrostatic sprayer, said motor powered by the transformer arrangement.

3. The sprayer arrangement according to claim 1, wherein one of the sprayer and a moving element of the coating machine includes a high-voltage generator, the high-voltage generator being supplied power by the transformer arrangement of the sprayer arrangement.

4. The sprayer arrangement according to claim 3, wherein the transformer arrangement is located at least partially in an arm of a coating robot, the arm forming the moving element.

5. The sprayer arrangement according to claim 4, wherein a part of the transformer arrangement which is located in the robot arm is charged to the predetermined voltage during operation.

6. The sprayer arrangement according to claim 4, wherein a part of the transformer arrangement is structurally integrated in a body of the robot arm, thereby contributing to the mechanical strength thereof.

16. The sprayer arrangement according to claim 1, wherein the sprayer components are selected from a group consisting of:

sensors, and

actuators.

7. A sprayer arrangement for a coating machine for the serial electrostatic coating of workpieces, comprising:

an electrostatic sprayer including a device for charging a coating material to a predetermined voltage, the electrostatic sprayer comprising an area which is charged to the predetermined voltage during operation and in which there are located electrical components, wherein signals in communication with the electrical components of the sprayer arrangement are galvanically isolated from the area of the sprayer arrangement which is at high-voltage potential.

8. The sprayer arrangement according to claim 7, wherein the signals from all the electrical components are galvanically isolated from the area which is at high-voltage potential, the electrical components including at least one of an actuator, a sensor, and a control system.

9. The sprayer arrangement according to claim 7, further comprising at least one optical fibers configured to provided a galvanically isolated transmission signal to the electrical components.

10. The sprayer arrangement according to claim 7, further comprising a radio link configured to provide a galvanically isolated transmission signal to the electrical components.

11. The sprayer arrangement according to claim 10, wherein the radio link includes one of a Bluetooth system and a WLAN system.

12. The sprayer arrangement according to claim 7, wherein a bidirectional signal transmission takes place on a same transmission path that includes the galvanically isolated components.

13. The sprayer arrangement claim 7, wherein the signals in communication with the electrical components are superposed with a voltages of a transformer arrangement.

14. The sprayer arrangement according to claim 7, further comprising a system for checking the correctness of the received signals.

15. The sprayer arrangement according to claim 7, further comprising an electronic monitoring device including monitoring software configured to monitor a transmission path the electronic monitoring device configured to generates an error message when an error is detected by the monitoring software.

17. The sprayer arrangement according to claim 7, wherein the electrical components are selected from a group consisting of:

sensors,

actuators, and

control systems.