Fluid distribution system having noise reduction mechanism
AssigneeE. I. Du Pont de Nemours and Company
InventorsTerrence A. Dear, Karl U. Ingard
Life of this patent
Estimating the term…
Abstract
A fluid distribution system, such as a valve, comprises a housing having a chamber which has a plurality of acoustic modes. The acoustic modes are excited when fluid flows through the chamber. An inlet passage and an outlet passage are disposed in fluid communication with the chamber. A plate is disposed in the inlet passage. A plurality of orifices are formed in the plate. The orifices conduct fluid from the inlet passage to the chamber and reduce the coupling between the flow of fluid through the inlet passage and the acoustic modes of the chamber. With this arrangement, the acoustic modes of the chamber and the resonance frequency of each of the orifices are substantially unexcited by the flow of fluid through the orifices.
Claims18
A fluid distribution system for conducting a fluid therethrough, comprising:
- (a) a housing including at least one chamber, the chamber having a plurality of acoustic modes, the fluid having oscillations carried therein and the acoustic modes being excited when the fluid flows through the chamber;
- (b) an inlet passage and an outlet disposed in the housing and in fluid communication with the chamber;
- and
- (c) means for eliminating narrow band noise comprising a plurality of orifices disposed in the inlet passage for reducing the coupling between the flow of fluid through the inlet passage and the acoustic modes of the chamber, each of the orifices having a resonance frequency, a length, L, and a diameter, d, and is sized substantially according to the relationship:
- 1/4>L/d>4, whereby the acoustic modes of the chamber and the resonance frequency of each of the orifices are substantially unexcited by the flow of fluid through the orifices.
A valve for conducting a fluid therethrough comprising:
- (a) a valve body having a valve chamber, the valve chamber having a plurality of acoustic modes, the fluid having oscillations carried therein and the acoustic modes being excited when the fluid flows through the chamber;
- (b) at least one inlet passage and one outlet passage disposed in fluid communication with the valve chamber;
- and
- (c) means for eliminating narrow band noise comprising a plurality of orifices disposed in the inlet passage for reducing the coupling between the flow of fluid through the inlet passage and the acoustic modes of the valve chamber, each of the orifices having a resonance frequency, a length, L', and a diameter, d', and is sized substantially according to the relationship:
- 1/4>L'/d'>4, whereby the acoustic modes of the chamber and the resonance frequency of each of the orifices are substantially unexcited by the flow of fluid through the orifices.
A valve for conducting a fluid therethrough, comprising:
- (a) a valve body having a valve chamber, the valve chamber having a plurality of acoustic modes, the fluid having oscillations therein and the acoustic modes being excited when the fluid flows through the valve chamber;
- (b) means for eliminating narrow band noise comprising a plurality of inlet passage openings disposed in the valve body and in fluid communication with the valve chamber for reducing the coupling between the flow of fluid therethrough and the acoustic modes of the valve chamber, each of the inlet passage openings having a resonance frequency, a length, L'', and a diameter, d'', and is sized substantially according to the relationship:
- 1/4>L''/d''>4, whereby the acoustic modes of the chamber and the resonance frequency of each of the inlet passage openings are substantially unexcited by the flow of fluid through the inlet passage openings;
- and
- (c) at least one outlet passage disposed in fluid communication with the valve chamber.
A fluid distribution system for conducting a fluid therethrough, comprising:
- (a) a housing including at least one chamber, the chamber having a plurality of acoustic modes, the fluid having oscillations carried therein and the acoustic modes being excited when the fluid flows through the chamber;
- (b) an inlet passage and an outlet disposed in the housing and in fluid communication with the chamber;
- and
- (c) a plate disposed in the inlet passage for eliminating narrow band noise, the plate being deformed radially inwardly into the inlet passage and comprising a plurality of orifices disposed therein for reducing the coupling between the flow of fluid through the inlet passage and the acoustic modes of the chamber, whereby the acoustic modes of the chamber and the resonance frequency of each of the orifices are substantially unexcited by the flow of fluid through the orifices.
A valve for conducting a fluid therethrough, comprising:
- (a) a valve body having a valve chamber, the valve chamber having a plurality of acoustic modes, the fluid having oscillations carried therein and the acoustic modes being excited when the fluid flows through the valve chamber;
- (b) at least one inlet passage and one outlet passage disposed in fluid communication with the valve chamber;
- and
- (c) a sleeve surrounding the inlet passage for eliminating narrow band noise, the sleeve being radially deformed into the inlet passage and comprising a plurality of orifices formed therein for reducing the coupling between the flow of fluid through the inlet passage and the acoustic modes of the valve chamber, whereby the acoustic modes of the chamber and the resonance frequency of each of the orifices are substantially unexcited by the flow of fluid through the orifices.
Dependencies are inferred from the claim text.