RADIAL PISTON DAMPED TORSIONAL COUPLING AND MACHINE USING SAME

摘要

A damped torsional coupling (30) is utilized to couple a drive shaft (12) to a work shaft while permitting some relative rotation due to torsional vibrations. The coupling (30) includes a second coupler (50) oriented to rotate with respect to a first coupler (40) about an axis (80) through a continuum of negative to positive torque orientations. The first coupler (40) defines a fluted perimeter surface (41) with a number of flutes (42), distributed with radial symmetry about the axis (80). The second coupler (50) a number of pistons (52) reciprocally received in respective barrels (53) to define a variable volume chamber (60) fluidly connected to a damping passage. A spring (63) biases the pistons (52) and barrels (53) to extend toward a position in contact with one of the flutes (42). The contact end (55) may be an edge (57) of a roller (56) that rolls on the fluted perimeter surface (41) in one of the flutes (42) responsive to torques transmitted between the couplers (40, 50).