LIQUID RING VIBRATION CONTROL DEVICE

摘要

A partition member for dividing a fluid chamber into a main fluid chamber and a sub-fluid chamber is provided with an idle orifice passage of which the opening is opened and closed by a seating section 20 provided on part of a diaphragm 15. A pushing member is provided to control the opening and closing operation. The seating member 20 is formed thick of which the upper and lower surfaces are provided with depressions 51, 52 respectively. The seating member 20 is also provided with a thin section 53 of which the periphery is provided with a hemispheric protrusion 54 and a seal 55 of a substantially right triangle cross section. An elastic body section 3 is also provided at the side surface with a lateral membrane section. <??>The partition member 12 is composed of a three-layer construction comprising an upper section 22 made of a resin, an intermediate section 23 made of an elastic material, and a lower section 24 of metal or the like. The outer periphery of the upper section 22 is disposed to overlap a cushion flange 33. The outer periphery of the lower section 24 is disposed to contact the lower surface of the cushion flange 33, and the lower surface of the outer periphery of the lower section 24 is mounted on an elastic peripheral wall 37. In this manner, the outer periphery of the partition member 12 is supported in a floating manner through the cushion flange 33 and the elastic peripheral wall 37. Thus, the change of internal pressure in the main fluid chamber 13 causes the lower section 24 to vertically move to control the change of internal pressure in the main fluid chamber 13. Further, the upper end of the a coil spring 48 of the pushing member 21 is supported in a floating manner by a pushing section 41 made of an elastic material so that the transmission of vibration from the coil spring 48 onto a metal plate 42 can be decreased. <IMAGE>