Crankshaft, for a reciprocating machine

摘要

The crank-pin (9) and crank webs of the crankshaft (6) of a reciprocating piston type of air compressor are formed with fillets (26,27) between the bearing surface and the webs (22,23) and these fillets have external curved surfaces 29 the radii of curvature (r) of which progressively decrease from a bearing surface 9a towards the respective web crankweb 6a to produce spreading of the stress patterns and improve the safety factor without enlarging the dimensions of the air compressor. <IMAGE> <IMAGE>