CRANKSHAFT PULLEY FOR DRIVING AUXILIARY UNITS OF PISTON MACHINE Russian patent published in 2018 - IPC F02B77/00 F16H55/36 F16F15/12 

FIELD: machine engineering.

SUBSTANCE: crankshaft pulley contains a hub portion, a rim, a disc portion, and a device for reducing its sound radiation. The device for reducing sound radiation is represented in the form of ports and perforation holes made in the pulley disc portion. On the both sides of its surface, the pulley disc portion is lined with a porous air-blown sound-absorbing material. Said material is coated with a protective sound-transparent film or foil or non-woven fabric layers with layers of materials.

EFFECT: noise emission suppression.

14 cl, 13 dwg