BEARING FOR HIGH SPEED COIL WINDING

摘要

A bearing for maintaining a bobbin in relative position about a transformer core leg during the winding of a coil on the bobbin. The bearing is movable along the core l eg such that a bearing surface of the bearing is positioned adjacent to but not touching ea ch of two outwardly facing surfaces of two spaced apart flanges of the bobbin. The bearing surface is highly polished to reduce friction. The bearing surface preferably includes a circumferential ridge centered about the axis of the transformer core leg on which the bobbi n is positioned. The outwardly facing surfaces of the two flanges each include a concentric groove shaped to complement the circumferential ridges of the bearing surfaces. When the bearing is in position the circumferential ridges are partially received within the concentric groove such that a small gap is maintained between the bearing surfaces and the outwardl y facing surfaces. The bearing surface can also include ports for exhausting low pressure air into the space between the bearing surface and the outside surface of the bobbin flange. The low pressure air cools the bearing surface and acts as a cushion between the bearing and the bobbin flanges.