MULTIMODE DAMPER OF PRESSURE PULSATIONS Russian patent published in 2010 - IPC F16L55/04 

FIELD: machine building.

SUBSTANCE: damper comprises body 1 with connecting flanges 2, along axis of which a cylinder 3 is installed with radial holes having alternating area along length in the form of perforation 4. On external surface of cylinder in bearings 5 there is a screw 6 installed with radial holes 7 in bush 8 and blades 9, at the periphery of which in the case there are fixed screw blades 10 fixed with opposite thread direction. The design includes pipeline 11 with valve 12 and nozzle 13 for gas phase supply.

EFFECT: expansion of pressure pulsations frequency range in liquid flow, where their amplitude is reduced, and reliability improvement.

2 dwg