Muffler with variable acoustic properties

摘要

Muffler with variable acoustic properties for pulsating gases, at least comprising1.1 an exhaust valve with a pressurized container (1) with the diaphragm (10), spring (2), the piston (7), piston rod (3), closing elements (5) on the piston rod (3) and pressure connection line (4),1.2. and a housing (0), are integrated therein1.2.1 Pipes (9),1.2.2 a mounting sleeve (15), which in an opening of the housing wall is mounted,1.2.3 a guide bushing (16) for the piston rod (3),1.2.4 and the closing element (5), the more or less of one of the tubes (9) closes,1.3. the mounting sleeve (15) carries the pressure element (1) and the guide bush (16), characterised by the features:1.4. the membrane (10) by means of two insulating discs (11, 12) against piston (7) and the piston rod (3) is isolated,1.5. between the closing element (5) and the pressure element (1) there is a thermally insulating layer (14),1.6. the thermally insulating layer (14)1.6.1 is located in the..