To suppress generation of noise caused by cavitation breakdown without degrading vibration control characteristic with a simple structure.SOLUTION: A limiting passage 24 includes a first communication portion 26 opened to a main liquid chamber 14, a second communication portion 27 opened to an auxiliary liquid chamber 15, and a main body flow channel 25 for communicating the first communication portion 26 and the second communication portion 27. At least one of the first communication portion 26 and the second communication portion 27 includes a plurality of pores 31 penetrating through a first barrier 28 facing the main liquid chamber 14. Positions of both end opening portions of the pore 31 are different from each other in a plane view of the first barrier 28, and at least in two of the plurality of pores 31, extending directions from a main body flow channel 25 side toward a main liquid chamber 14 side at an end portion of the main liquid chamber 14 side are different from each other.SELECTED DRAWING: Figure 1
【課題】簡易な構造で防振特性を低下させることなく、キャビテーション崩壊に起因する異音の発生を抑える。【解決手段】制限通路24は、主液室14に開口する第1連通部26、副液室15に開口する第2連通部27、および第1連通部26と第2連通部27とを連通する本体流路25を備え、第1連通部26および第2連通部27のうちの少なくとも一方は、主液室14に面する第1障壁28を貫通する複数の細孔31を備え、第1障壁28の平面視で、細孔31における両端開口部の位置は互いに異なっており、複数の細孔31のうちの少なくとも2つにおいて、主液室14側の端部における本体流路25側から主液室14側に向けて延びる向きが互いに異なっている。【選択図】図1
VIBRATION ISOLATION DEVICE
防振装置
2018-12-06
Patent
Electronic Resource
Japanese