Potential neutralization arrangement for an electrostatic rotary atomizer

摘要

For grounding or electrically charging the shaft of an electrostatic rotary atomizer working with external or direct charging, there are opposing, annular or spiral-shaped sharp edges in the outer surface of a part of the shaft and in the inner surface of a stationary bearing part at the desired potential, which have different, preferably opposite, thread directions, so that the edges intersect each other at points.

主权项

1. A potential neutralization arrangement for an electrostatic rotary atomizer rotatable in a region of a field, comprising:
a housing defining a bearing unit having a shaft rotatably disposed therein, with a part of said bearing unit having a fixed potential, and said shaft being electrically charged by an electrode; said shaft having an end part with a threaded surface structure defining a shaft edge and said part of said bearing unit having a fixed potential defining a threaded surface structure with a grounding edge, said threaded surface structures oriented in an opposite helical direction and said edges being radially spaced wherein an electrical charge is transferred between said shaft edge and said grounding edge thereby grounding said shaft without contact.