HYDRAULIC DAMPER FOR REDUCTION OF VERTICAL AND/OR HORIZONTAL VIBRATIONS OF FACILITY OR MECHANISM STRUCTURE

摘要

FIELD: machine building.SUBSTANCE: damper includes at least two chambers partially filled with liquid, which are interconnected with each other on their lower ends. At least one chamber is tightly closed on its upper end so that a closed air space is formed above liquid. At least one other chamber on its upper end is opened at least partially. Closed air space (V) is divided at least into two air sections (V-V). One air section (V) is located immediately above liquid (3), and one or more air sections (V-V) are connected to air section(V) located immediately above liquid (3), and/or with the corresponding neighbouring air section (V-V) through holes (7). Holes (7) are made so that they can be closed with a seal irrespective of each other by means of valves. Sensor (10) determines the load variation, and thus natural vibration frequency of facility or mechanism structure. Measurement values of sensor (10) are used with control unit (8) so that value of closed air space (V) can be controlled by valve opening and closing.EFFECT: achieving the possibility of adjusting the damping value with low energy consumption considering dynamically varying load.6 cl, 10 dwg