Torsional vibration isolator and method

Patent · Tue Oct 21 00:00:00 EDT 1986

OSTI ID:5074479

Allen, C A; Durrett, V D

This patent describes a multicylinder internal combustion engine having a rotatable crankshaft and a rotatable flywheel which together define an inertial system rotating about a predetermined axis of rotation. An improvement is described here which facilitates avoiding destructive effects on the crankshaft of stress induced by torsional vibration. The method comprises an elastomeric annulus coupling means operatively interposed between the crankshaft and flywheel for coupling the crankshaft and flywheel together for rotation of the flywheel with the crankshaft. The coupling means has a torsional spring rate of less than 20,000 in lb/radian effective to permit substantial angular displacement between the flywheel and the crankshaft for isolating the rotating inertia of the flywheel from the rotating inertia of the crankshaft after engine startup. The coupling means avoids dampening while preventing torsional vibration from being transferred between the flywheel and the crankshaft.

• Assignee: NOV; NOV-85-030213; EDB-86-192438
• Patent Number(s): US 4617884
• OSTI ID: 5074479
• Resource Relation: Patent File Date: Filed date 27 Jul 1984
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
MECHANICAL VIBRATIONS
SHOCK ABSORBERS
TORSION
CYLINDERS
DAMPING
ELASTOMERS
FLYWHEELS
IGNITION
INCIDENCE ANGLE
MOMENT OF INERTIA
ROTATION
SHAFTS
SPRINGS
START-UP
STRESS INTENSITY FACTORS
ENGINES
HEAT ENGINES
MACHINE PARTS
MECHANICAL ENERGY STORAGE EQUIPMENT
MOTION
POLYMERS
330100* - Internal Combustion Engines