NOISE RELEASE REDUCING METHOD FOR INTAKE NOISE ELIMINATOR FOR SUPERCHARGER AND ITS DEVICE

摘要

PROBLEM TO BE SOLVED: To further suppress the release of the rotating noises of an impeller in a supercharger to the outside. SOLUTION: At a central portion of a casing 16 formed into a cylindrical shape with one end closed and having an air inlet 18 provided in an outer peripheral wall 16b and an air outlet 17 in the center of an other end wall 16a, a cylindrical noise eliminator cavity 22 is provided which extends to the direction of the axial center and is communicated with the air outlet 17. On the outer peripheral side of the noise eliminator cavity 22, an air intake flow path 23 having a side wall face covered with a sound absorbing material 24 is provided for communicating an outer peripheral portion of the noise eliminator cavity 22 with the air inlet 18. A communication part 25 is provided at the central portion of an one end wall 16c of the casing corresponding to the noise eliminator cavity 22 and an additional space forming member 27 is mounted on the outside thereof to form an additional space 26. The rotating noises of the impeller 7 of a compressor 3 entering from the air outlet 17 into the casing 16 is previously reduced before entering into the air intake flow path 23 by the interaction of a sound field via the communication part 25 between the noise eliminator cavity 22 and the additional space 26. COPYRIGHT: (C)2005,JPO&NCIPI