Servo minimum pressure valve assembly

A pressure valve, the smallest technology, applied in the direction of inlet pressure control, servo motor components, fluid pressure actuators, etc., can solve problems such as unpredictable fuel systems

Active Publication Date: 2013-10-30
HAMILTON SUNDSTRAND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Without consistent valve operation, fuel systems can become unpredictable

Method used

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  • Servo minimum pressure valve assembly
  • Servo minimum pressure valve assembly
  • Servo minimum pressure valve assembly

Examples

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Embodiment Construction

[0012] figure 1 A perspective view of a fuel controller housing portion 100 of a fuel controller 102 for regulating fuel flow in a system, such as an aircraft gas turbine engine, is schematically shown. In one embodiment, fuel controller housing portion 100 includes pressure regulator valve section 105 , metering valve section 110 , containment housing section 115 generally adjacent metering valve section 110 , and servo minimum pressure valve section 120 . Other valves, controls, and feedback features (not shown) may also be included in fuel controller housing portion 100 or in other portions (not shown) of fuel controller 102 . For example, a separate servo pump may be included in fuel controller 102 to generate servo pressure. Fuel flowing into fuel control housing portion 100 is pressurized in pump section 125 . The pressurized flow is metered in metering valve section 110 and then output as fuel combustion flow at metered pressure. The pressure regulating valve section...

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Abstract

A servo minimum pressure valve assembly includes a servo minimum pressure sleeve and a servo minimum pressure valve spool. The servo minimum pressure sleeve includes an inlet aperture, a first window set, a second window set, and a third window set. A ratio of an outlet window diameter of the first window set to an outlet window diameter of the second window set is between 2.34 and 2.65. The outlet window diameter of the second window set is greater than an outlet window diameter of the third window set. The servo minimum pressure valve spool is configured to move bi-directionally along a longitudinal axis of the servo minimum pressure valve sleeve. The servo minimum pressure valve spool includes a cylindrical portion to control a fluid flow between the inlet aperture of the servo minimum pressure sleeve and the first, second, and third window sets of the servo minimum pressure sleeve.

Description

technical field [0001] The present invention relates to fuel flow controllers, and more particularly to servo minimum pressure valves. Background technique [0002] Fuel flow control within a system, such as a gas turbine, includes controlling and maintaining pressure within a fuel controller housing of a fuel controller. To control and maintain the pressure within the fuel controller housing, fuel flow is often increased, decreased and diverted by a combination of control valves. A positive displacement pump pressurizes the fuel prior to metering it and delivering it to the engine. Positive displacement pumps are usually sized to ensure excess flow volume under all possible operating conditions. The output of the pump is delivered to a fuel metering valve which, in conjunction with a bypassed pressure regulator valve (PRV), meters the flow rate of the fuel combustion stream to the engine. A fuel controller may also provide fluid pressure for the actuator. Fluid pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F02C9/26
CPCF02C9/00G05D16/10F16K11/07F02C7/232G05D16/024Y10T137/0502Y10T137/86734Y10T137/86799
Inventor A·里基斯
Owner HAMILTON SUNDSTRAND CORP
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