Oscillation damper assembly to dampen mechanical motion

摘要

The assembly has a damper cylinder (13) which is sub-divided into two chambers (13a,b) by a piston (5) moved by a connecting rod (3). Vapour is discharged through a valve (1) whose valve faces (29) are above the main part of the valve body (27). Passages (5a,b) past the valve seats are covered by the valve disc (15). The valve seat is covered by a circular valve disc in contact with a spring (21). A flow reversal disc (17) is of a thickness (s) less than that (S) of the valve disk and is arranged concentric to it. The reverse flow disc movement is dependent upon the direction of gas flow to the valve disc. The gas valve has an initial opening cross-sectional which is the sum of that admitted by the first (23) and second (25) discs. The second (25) pre-opening cross-section is determined by the reverse flow disc.