ACOUSTOMECHANICAL CONVERTER Russian patent published in 2013 - IPC G10K9/02 

FIELD: machine building.

SUBSTANCE: acoustomechanical converter comprises hollow cylindrical case. Case ends are confined by inlet pipe and diffuser. Said case houses fixed airtight baffle to divide it into two chambers not communicated in terms of acoustics. Besides it accommodates structural and radiating diaphragms with their flexible edges secured to said case to make high-pressure inlet chamber, high-pressure balancing chamber and barometric pressure chamber. Also it incorporates a rod arranged coaxially with said case and rigidly secured to central part of aforesaid diaphragms fitted via seal in fixed airtight baffle to displace thereabout. Note here that high-pressure inlet chamber and high-pressure balancing chambers are communicated via calibrated port. Expansion-contraction springs are arranged between stiff parts of aforesaid diaphragms and fixed airtight baffle, aligned with case axis. Note here that said rod inside barometric pressure chamber represents a composite element. Note also that its components are coupled by mid spring to allow relative elastic displacement of rod components Stiffness of mid spring makes 0.15-0.25 of total stiffness of expansion-contraction springs. Said mid spring may be shaped to, at least, ring section or oval.

EFFECT: lower noise inside cabin of vehicle, particularly, that with turbosupercharger.

3 cl, 4 dwg