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Valve defining modulated and unmodulated flow paths

a flow path and valve technology, applied in the field of valves, can solve problems such as inability to modify the ngs system, and achieve the effect of reducing the number of valves

Active Publication Date: 2009-10-01
HAMILTON SUNDSTRAND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables efficient distribution of ram air for maintaining an inert environment and cooling components by providing constant and variable airflow through a single inlet duct, enhancing the nitrogen generating system's performance without the need for additional inlet ducts.

Problems solved by technology

Given the space constraints in many aircraft, it may be undesirable to modify the NGS system to include more than one inlet duct to provide for modulating and constant ram flows to the heat exchanger.

Method used

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  • Valve defining modulated and unmodulated flow paths
  • Valve defining modulated and unmodulated flow paths
  • Valve defining modulated and unmodulated flow paths

Examples

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Embodiment Construction

[0010]The present invention is a valve defining at least a first modulated or variable flow path and a second, unmodulated or bypass flow path. While the inventive valve is described below in reference to a nitrogen generating system (NGS) for an aircraft, it should be understood that a valve in accordance with the present invention is suitable for any application in which it is desirable to implement a valve with at least two flow paths that share a common inlet portion.

[0011]FIG. 1 shows nitrogen generating system (NGS) 10, which includes inlet air valve 12, heat exchanger 14, motor 16, first compressor 18, and second compressor 20. Valve 12 is mounted to the inlet header of heat exchanger 14, and includes valve body 30, baffle 32, modulating valve disk 34, actuator 36, and shaft 38. Valve 12 provides dual flow paths for ram air into heat exchanger 14. Bypass path B is shown to the right of baffle or separator 32, while variable path V (shown to the left of separator 32) has a var...

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Abstract

A valve comprises an inlet portion configured to couple to a source of a fluid, and a body portion in fluidic communication with the inlet portion. The body portion defines a modulated flow path and a constant flow path adjacent to the modulated flow path.

Description

BACKGROUND[0001]The present invention relates to a valve. More particularly, the present invention relates to a fluidic or air valve defining at least a first flow path with a modulating device such as a disk or flapper and a second, unmodulated flow path.[0002]One method of suppressing fire and explosions in an aircraft fuel tank is to provide a non-explosive atmosphere within the fuel tank by replacing potentially combustible air in a fuel tank ullage (i.e., the space within the fuel tank unoccupied by fuel) with an inerting gas, such as nitrogen-enriched air (NEA). An onboard inerting system is often used to supply NEA (or another inerting gas) into the tank ullage when the demand arises (e.g., in order to increase the pressure inside the ullage in response to changing atmospheric conditions or to otherwise maintain the oxygen content in the ullage at or below a desirable level). The inerting system can typically include a nitrogen generating system (NGS) that separates nitrogen ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25J3/00G05D11/02
CPCB64D37/32Y10T137/87812Y10T137/265Y10T137/877Y10T137/87788
Inventor BIZZARRO, PETER
Owner HAMILTON SUNDSTRAND CORP