초록 ▼

Method and apparatus for reduction of fluid borne noise in a hydraulic system are disclosed. An improved isolating hose assembly comprising first, second and third volumetrically compliant members with first and second inductive flow members providing fluidic coupling therebetween is disclosed. The

Method and apparatus for reduction of fluid borne noise in a hydraulic system are disclosed. An improved isolating hose assembly comprising first, second and third volumetrically compliant members with first and second inductive flow members providing fluidic coupling therebetween is disclosed. The improved isolating hose assembly acts similarly to an electronic low pass filter network in deterring fluid borne noise from entering portions of the hydraulic system located therebeyond. A modified isolating hose assembly comprising a resistive member introduced within the second volumetrically compliant member in order to eliminate the possibility of a deleterious resonance in the assembly is disclosed. In addition, apparatus for additionally reducing structure borne noise in hydraulic systems comprising direct hydraulic coupling of the first volumetrically compliant member to internal output ports of the hydraulic system\s pump is disclosed.

대표청구항 ▼

An improved apparatus for reduction of fluid borne noise in a hydraulic system, said apparatus forming a passage and comprising: a first, a second and a third conduit member, said first, second and third conduit members having circumferential walls of predetermined internal bore diameters, said wall

An improved apparatus for reduction of fluid borne noise in a hydraulic system, said apparatus forming a passage and comprising: a first, a second and a third conduit member, said first, second and third conduit members having circumferential walls of predetermined internal bore diameters, said walls being formed of a compliant material permitting volumetrical expansion of portions of said passage comprised therein in response to an increase in pressure; first and second inductive flow members each having a bore and a pair of ends, one of said pair of ends of said first inductive flow member being connected to one end of said first conduit member and another end of said first inductive flow member being connected to one end of said second conduit member, one of said pair of ends of said second inductive flow member being connected to an other end of said second conduit member and an other end of said second inductive flow member being connected to one end of said third conduit member, said bores having diameters smaller than said predetermined bore diameters of said first, second and third conduit members to restrict alternating flow of said fluid from said first conduit member to said second conduit member and from said second conduit member to said third conduit member; an input member connected to an other end of said first conduit member to permit introduction of a flow of fluid into said passage; and an output member connected to an other end of said third conduit member to permit delivery of said flow of fluid from said passage to remaining portions of said hydraulic system.