| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid-sealed vibration control device, which produces an effective vibration control effect against vibration of a plurality of frequency areas or a wide frequency area through flow operation of sealed fluid and control of a pressure, through simple structure with the reduced number of parts. SOLUTION: A first orifice passage 68 tuned with the low frequency side and a second orifice passage 76 tuned to the high frequency side are arranged between a main liquid chamber 58 to which vibration is inputted and a volume variable auxiliary liquid chamber 60. Meanwhile, a part of the wall part of the auxiliary liquid chamber 60 is formed of a pneumatically excited excitation plate 78 and the second orifice passage 76 is cut off by the excitation plate 78. During input of vibration on the low frequency side, a vibration control effect by the first orifice passage 68 is produced in the cutoff state of the second orifice passage 76. Meanwhile, during input of vibration on the high frequency side, an internal pressure change produced at the auxiliary liquid chamber 60 through excitation of an excitation plate 78 is exerted on the main liquid chamber 58 through the orifice passage 76 and this way produces a vibration control effect through hydraulic control. |
