A rotary type electrostatic spray painting device.

摘要

A rotary type electrostatic spray painting device (1) comprises a rotary shaft (8) and a spray head (9) fixed onto the front end of the rotary shaft. Paint is fed onto the cup shaped inner wall (15) of the spray head. The rotary shaft is supported by a single thrust air bearing (44) and a pair of radial air bearings (22;23). An electrode (66), continuously contacting the rear end of the rotary shaft, is provided. A negative high voltage is applied to the housing (2;3) of the paint device. In addition, the negative high voltage is also applied to the spray head (9) via the electrode and the rotary shaft. The thrust air bearing comprises an annular plate (44) fixed onto the housing, and a pair of runners (39;40) fixed onto the rotary shaft (8) and arranged on each side of the annular plate. A plurality of radially extending air passages is formed in the annular plate. A plurality of air outflow bores is formed on the side walls of the annular plate. Each of the air outflow bores is connected to an air pump via the corresponding air passage.