PNEUMOHYDRAULIC SMOOTHING DAMPER Russian patent published in 2003 - IPC

FIELD: instrumentation engineering. SUBSTANCE: proposed damper is designed to protect instruments and automatic system from vibrations and shock waves. Damper contains damping vessel divided by flexible diaphragm into two spaces, one of which is filled with gas and other is connected with hydraulic main line. Flow limiters are installed in hydraulic main line at both sides from place of connection with damping vessel. Flow limiters are made in form of t-piece with two through unions for connection with measuring system and one side union for connection with damping vessel. Packs of throttling plates are installed in through channel of t-piece. Throttling plates are provided with holes and are separated by ring sealing spacers installed symmetrically relative to axis of outlet of t-piece side union. Moreover, damping vessel can be made in form of cylindrical cup with rigid rod. Semispherical boss is secured on end of rod opposite to place of connection of vessel with hydraulic main line. Flexible diaphragm is made in form of sleeve whose blind end is put on semispherical boss and edges are hermetically pressed to base of vessel pointed to place of its connection with hydraulic main line. EFFECT: reduced amplitude of vibrations in hydraulic main line. 6 cl, 2 dwg