Rotary sprayer for spraying a coating material, and an installation including such a sprayer

A rotary sprayer for spraying a coating material, the sprayer comprising:

• a material sprayer member having an axis of rotation and presenting at least one sprayer edge suitable for forming a jet of material;
• a rotary drive member connected to drive said material sprayer member in rotation;
• and
• a stationary body presenting primary orifices disposed on a primary contour surrounding the axis of rotation of said material sprayer member, and secondary orifices disposed on a secondary contour surrounding the axis of rotation of said material sprayer member in a manner that the secondary orifices are circumferentially offset relative to the primary orifices, the primary and secondary orifices serving respectively to emit primary and secondary air jets, each primary air jet being emitted in a respective primary direction that is inclined relative to the axis of rotation, the primary direction presenting at least an axial component and a circumferential component, such that said primary air jet freely crosses the region where the at least one sprayer edge is located, each secondary air jet being emitted in a respective secondary direction that is inclined relative to the axis of rotation, the secondary direction presenting at least an axial component and a radial component,
• wherein the components of each said secondary air jet are such that each said secondary air jet strikes an outside surface of the sprayer member, and wherein the primary and secondary contours coincide with a common circle centered on the axis of rotation, and
• wherein the body presents primary channels and secondary channels opening out respectively via the primary and secondary orifices, the primary and secondary channels being inclined relative to the axis of rotation respectively along the primary and secondary directions.