초록 ▼

A rotary noise attenuating valve is provided which utilizes noise attenuation technology previously utilized with linear valves. The arrangement includes an impedance assembly in which the area with the impedance assembly which is accessed by the flow downstream of a rotary closure element flow is v

A rotary noise attenuating valve is provided which utilizes noise attenuation technology previously utilized with linear valves. The arrangement includes an impedance assembly in which the area with the impedance assembly which is accessed by the flow downstream of a rotary closure element flow is varied upon opening of the rotary closure element, with an interface assembly disposed between the rotary closure element and the impedance assembly. As a result, benefits previously realized only in linear valves are attainable utilizing a rotary valve, while the benefits attendant to rotary valves (such as greater capacity, variable .DELTA.p and/or minimum .DELTA.p under max flow) are also attainable.

대표청구항 ▼

[ What is claimed as new and desired to be secured by letters Patent of the United States is:] [1.] A valve assembly comprising:(a) a rotary closure element; and(b) an impedance assembly disposed downstream of said rotary closure element, said impedance assembly including:(i) impedance means definin

[ What is claimed as new and desired to be secured by letters Patent of the United States is:] [1.] A valve assembly comprising:(a) a rotary closure element; and(b) an impedance assembly disposed downstream of said rotary closure element, said impedance assembly including:(i) impedance means defining a plurality of passageways;(ii) interface means between said rotary closure element and said impedance means defining a plurality of passageways, said interface means for varying access to said plurality of passageways based upon positioning of said rotary closure element such that a number of passageways through which flow passes progressively increases during opening of said rotary closure element, said interface means including a plurality of channels;wherein said plurality of channels of said interface means each has an inlet adjacent a location of said rotary closure element to provide a plurality of inlets, and wherein at least a portion of said plurality of inlets collectively form a contour corresponding to a contour of an outer surface of said rotary closure element, each of said plurality of channels of said interface means further including an outlet disposed adjacent to said impedance means, wherein fluid flows in a portion of said interface means along a first direction, and further wherein fluid passes from said plurality of outlets and through said passageways of said impedance means in a direction substantially perpendicular to said first direction; andwherein at least a portion of said plurality of channels is defined by a plurality of walls extending in said first direction, and wherein said plurality of walls are non-perforated walls.