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Title:
流体流システム用騒音低減デバイス
Document Type and Number:
Japanese Patent JP4458854
Kind Code:
B2
Abstract:
A noise reduction device for use in a fluid flow system comprises a central section and an outer annular section. The outer annular section is designed to reduce the velocity of an annular fluid flow relative to a central core fluid flow. The central section of the device has a plurality of apertures, while the annular section has upstream apertures communicating with a pressure reduction chamber and downstream apertures. The upstream apertures of the annular section are smaller than, and off set from, the downstream apertures of an annular section to increase the pressure reduction and further reduce the velocity of the fluid flow in an annular section. A method is also described for reducing noise transmissions from a piping system wherein the fluid flow through the piping system is separated into an annular fluid flow and a core fluid flow, and the velocity of the annular fluid flow is reduced relative to the core fluid flow.

Inventors:
Bouga, Henry, Doubleview
Application Number:
JP2003580744A
Publication Date:
April 28, 2010
Filing Date:
March 19, 2003
Export Citation:
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Assignee:
Dresser, ink
International Classes:
F16K47/08; F16K47/02
Domestic Patent References:
JP56059096A
JP4262191A
JP2001124280A
JP57023159B2
JP56075388U
JP1144594U
Foreign References:
EP0101323A2
Attorney, Agent or Firm:
Yuzo Sanada
Ohara Shizuo