Drive pinion of an air-oil separator of a turbomachine accessory gearbox

An accessory gearbox comprising an air/oil separator for a turbomachine, the accessory gearbox further comprising:

• a pinion configured to rotationally drive the air/oil separator about an axis of rotation, said pinion comprising a circular body, said circular body comprising:
• a first hollow shaft at a center of the pinion and rotatable around the axis of rotation;
• a plurality of gear teeth located along a periphery of the circular body;
• a web plate formed between the first hollow shaft and the plurality of gear teeth, said web plate having a plurality of guiding openings that are arranged in spaced apart relations with each of the plurality of guiding openings having a plurality of interconnected sides including a first side having a first guiding surface and a second side having a second guiding surface, the first and second guiding surfaces are inclined with respect to the axis of rotation and opposed one another to guide an airflow parallel to the axis of rotation;
• the air/oil separator comprising:
• a cylindrical body having a proximal end with a flow input, a distal end, and a cavity between the proximal end and the distal end;
• and
• a second hollow shaft located internally and arranged coaxially with an axis of the cylindrical body, the second hollow shaft adjoins and aligns with the first hollow shaft about the axis of rotation;
• and
• wherein the proximal end of the air/oil separator adjoins the pinion.

An accessory gearbox comprising an air/oil separator for a turbomachine, the accessory gearbox further comprising:

• a pinion configured to rotationally drive the air/oil separator about an axis of rotation, the pinion comprising a circular body, said circular body comprising:
• a first hollow shaft at a center of the pinion and rotatable about the axis of rotation;
• a plurality of gear teeth located along a periphery of the circular body;
• a web plate formed between the first hollow shaft and the plurality of gear teeth, said web plate having a plurality of guiding openings, wherein each of the plurality of guiding openings having at least two guiding surfaces that are inclined with respect to the axis of rotation to guide an airflow parallel to the axis of rotation;
• the air/oil separator comprising:
• a cylindrical body having a proximal end with a flow input, a distal end, and a cavity between the proximal end and the distal end;
• and
• a second hollow shaft located internally and arranged coaxially with an axis of the cylindrical body, said second hollow shaft adjoins and aligns with the first hollow shaft about the axis of rotation, and the second hollow shaft having one or more openings fluidly connecting the cavity of the cylindrical body to an inner cavity of the second hollow shaft to create a flow output for a de-oiled air;
• and
• wherein the proximal end of the air/oil separator adjoins the first pinion so that airflow traverses through the flow input.