Vibration damping system for a rolling mill with first and second passive hydraulic elements

摘要

The present application relates to a vibration damping system for a rolling mill comprising a rolling cage and a bending adjustment system (3,3′) of the rollers comprising hydraulic actuators acting on the rollers and hydraulic circuits (18, 19) for feeding, and hydraulic damping means (25, 31, 32) of a force connected to the hydraulic circuits (18, 19) for actuating a damping effect by means of the hydraulic actuators. The hydraulic damping means comprises a pair of hydraulic pumps (25B, 25C) or a pair of hydraulic cylinders with a dual chamber, connected in an opposite direction to each other to the hydraulic circuits (18, 19).

主权项

1. A vibration damping system of a rolling mill comprising at least a rolling stand having rollers and a bending adjustment system of the rollers, the vibration damping system comprising:
hydraulic actuators acting on said rollers for adjusting the reciprocal position between the rollers, hydraulic circuits for feeding said hydraulic actuators, hydraulic damping means connected to said hydraulic circuits for actuating a damping force by means of said hydraulic actuators,whereinsaid hydraulic damping means comprise:
a first passive hydraulic element comprising a respective mobile part, connected between said hydraulic feeding circuits, a second passive hydraulic element comprising a respective mobile part, connected between said hydraulic feeding circuits in opposite manner with respect to said first passive hydraulic element, a first elastic element connecting said respective mobile parts of said first and second passive hydraulic elements with each other, at least one electrodynamic damping device rigidly connected to one of said mobile parts of said first or second passive hydraulic element.