The disclosure relates to a rotary atomizer for applying a spray jet of a coating agent (e.g. paint) to a component (e.g. motor vehicle body component). The disclosure provides that the construction dimensions of the rotary atomizer are coordinated in such a way that the air pressure at the outlet opening of the paint nozzle during operation is lower than the air pressure in the nozzle chamber of the bell cup and in the external rinsing channels in order to prevent a backflow of the coating agent from the outlet opening of the paint nozzle backwards in the direction of the nozzle chamber due to the pressure difference.

A bell plate is rotated about a rotational axis, and coating material is supplied to a discharge surface of the bell plate such that the coating material is projected away from the bell plate. A working fluid is blown at least temporarily as a transonic or supersonic flow onto the coating material coming from the bell plate by means of a dispensing device. Furthermore, a spray head for a rotary atomizer is provided for applying a coating material to an object, having a bell plate which can be rotated about a rotational axis and which has a discharge surface, wherein coating material can be supplied to the discharge surface such that the coating material is projected away from the bell plate. A dispensing device which can blow a working fluid at least temporarily as a transonic or supersonic flow onto the coating material coming from the bell plate.

An annular gap space (18), into which a part of turbine air for driving a turbine (6) and exhaust air discharged from a rear thrust air bearing (12) flow out, is provided between an inner peripheral surface (5B) of a rotational shaft (5) and an outer peripheral surface (17B) of a feed tube (17). Air outflow holes (25) are provided in the rotational shaft (5) to be positioned between a radial air bearing (8) and a rotary atomizing head (16) and to be radially bored through the rotational shaft (5). As a result, the exhaust air flowing in the annular gap space (18) flows out outside of the rotational shaft (5) from the air outflow holes (25) in a position behind the rotary atomizing head (16).

An ultrasonic-rotary composite atomization mechanism comprises a housing and an ultrasonic unit passing through the housing and free to rotate with respect to the housing. A dynamic unit is installed in a position of the ultrasonic unit, which is corresponding to the housing, to drive the ultrasonic unit to rotate with respect to the housing. The ultrasonic unit includes a material supply channel, a vibration member disposed in the ultrasonic unit, and a vibration-rotation cup connected with the material supply channel. The material supply channel carries a liquid into the vibration-rotation cup. The dynamic unit and vibration member operate simultaneously to make the vibration-rotation cup rotate at high speed and vibrate ultrasonically. Thus is generated a synergistic effect: the ultrasonic vibration uses inertia force to break the cohesion and disperse the liquid, and the high-speed rotation generates centrifugal force to atomize the liquid.

An installation for surface treating, in particular painting, objects, in particular vehicle body parts, having a treatment booth which defines a treatment space in which a booth atmosphere prevails. The objects can be transported into the treatment space and out of it again by means of a transport system. Treatment of the objects in the treatment space can be carried out by means of at least one treatment unit which requires a process gas for the operation. The process gas can be supplied to the at least one treatment unit by means of a supply device, wherein the process gas arrives in the treatment space during the treatment procedure and thus contributes to the booth atmosphere. A separating system is provided, to which booth atmosphere can be supplied and by means of which process gas can be separated from the booth atmosphere. A corresponding process is moreover disclosed.

The present invention relates to a coating product atomizer comprising a main body, an air supply skirt attached to the main body and magnetic attraction means between the magnetic body and the air supply skirt. The atomizer comprises a magneto-pneumatic or magneto-hydraulic system which includes a magnetic device for hooking the air supply skirt to the main body and a pneumatic or hydraulic mechanism for locking and clamping the air supply skirt to the main body.

The present invention relates to a rotary atomizer for coating products comprising a main body and a bowl rotated by a rotating member about a axis of rotation defined by the main body. The bowl is equipped with first means of magnetic coupling apt to cooperate with matching second means of magnetic coupling fastened to a non-rotating part of the atomizer. The first and second means of coupling are apt to exert a force at least partially axial with respect to the axis of rotation of the bowl, the force inducing the coupling in rotation of the bowl with the rotating member. The second means of magnetic coupling are supported by an air supply skirt directly mounted on the main body.

A turbine rotor, e.g., for a drive turbine of a rotary atomizer, is disclosed having a rotatably supported turbine shaft with the potential for mounting an atomizer wheel, and having at least one drive turbine wheel having a plurality of turbine blades. The turbine blades of the drive turbine wheel may be impinged on during operation by a drive fluid in order to drive the turbine rotor. The drive turbine wheel may be designed for the drive fluid to axially impinge on the turbine blades. A complete drive turbine having such a turbine rotor is also disclosed, as well as a complete rotary atomizer and individual exemplary components of the drive turbine.

A shaping air ring (10) is configured of a body (11), a cover (13) and a nozzle (15). A tapered conical protrusion (17) is provided in a front end of the nozzle (15) to abut on the cover (13) in contact therewith without a clearance therebetween. Numerous inclined recessed grooves (20) are provided on a forward tapered surfaces (17C) of the conical protrusion (17) over the entire periphery. Further, a first shaping air ejecting hole (23) is formed between each of the inclined recessed grooves (20) and an inner peripheral surface (13B2) of the cover (13) to eject shaping air toward a releasing edge (9E) of a rotary atomizing head (9). Second shaping air ejecting holes (24) are provided on an inner peripheral surface (16A) of the nozzle (15) to eject shaping air along an outer peripheral surface (9C) of the rotary atomizing head (9).

A cylindrical shaping air ring provided on an outer periphery of a rotary atomizing head, includes an overhanging portion as an isolation means for isolating a second shaping air jetting unit from the air flowing around the shaping air ring.