Nacelle anti ice system
First Claim
1. An anti-icing system of a nacelle inlet of an engine of an aircraft, wherein the anti-icing system comprises:
- a valve assembly fluidly connected to the nacelle inlet, wherein the valve assembly comprises;
a first direct acting valve comprising;
a first inlet;
a first valve chamber fluidly connected to the first inlet;
a first internal valve body circumferentially surrounding the first valve chamber, the first internal valve body having a first axial face;
a first outlet; and
a first piston for adjusting a rate of flow of air through the first direct acting valve, wherein the first piston is slidably engaged with the first internal valve body;
a first control valve assembly fluidly connected to the first valve chamber of the first direct acting valve;
a second direct acting valve comprising;
a second inlet;
a second valve chamber fluidly connected to the second inlet;
a second internal valve body circumferentially surrounding the second valve chamber;
a second outlet; and
a second piston for adjusting a rate of flow of air through the second direct acting valve, wherein the second piston is slidably engaged with the second internal valve body, and further wherein the second direct acting valve is fluidly connected to the first direct acting valve in a series configuration such that the second inlet of the second direct acting valve is directly connected to the first outlet of the first direct acting valve; and
a second control valve assembly fluidly connected to the second valve chamber of the second direct acting valve;
a first lip element disposed on an upstream end of the first piston, the first lip element for sealing engagement with first internal valve body of the first direct acting valve, wherein a first axial face of the first lip element extends at an angle θ
LIP between a first plane extending in an axial direction and the first axial face of the first lip element; and
wherein the first axial face of the first internal valve body extends at an angle θ
VB between a second plane extending in an axial direction and the first axial face of the first internal valve body, further wherein an expansion angle θ
EXP equivalent to the difference between angle θ
LIP and angle θ
VB comprises an angle from 15°
to 60°
.
4 Assignments
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Accused Products
Abstract
An anti-icing system of a nacelle inlet of an engine of an aircraft includes first and second direct acting valves and first and second control valve assemblies fluidly connected to the nacelle inlet. The first direct acting valve includes a first inlet, outlet, valve chamber, and piston. The first piston is positioned in the first direct acting valve. The first control valve assembly is fluidly connected to the first valve. The second direct acting valve includes a second inlet, outlet, valve chamber, and piston. The second piston is positioned in the second direct acting valve. The second direct acting valve is fluidly connected to the first direct acting valve in a series configuration. The second control valve assembly is fluidly connected to the second valve chamber.
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Citations
12 Claims
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1. An anti-icing system of a nacelle inlet of an engine of an aircraft, wherein the anti-icing system comprises:
a valve assembly fluidly connected to the nacelle inlet, wherein the valve assembly comprises; a first direct acting valve comprising; a first inlet; a first valve chamber fluidly connected to the first inlet; a first internal valve body circumferentially surrounding the first valve chamber, the first internal valve body having a first axial face; a first outlet; and a first piston for adjusting a rate of flow of air through the first direct acting valve, wherein the first piston is slidably engaged with the first internal valve body; a first control valve assembly fluidly connected to the first valve chamber of the first direct acting valve; a second direct acting valve comprising; a second inlet; a second valve chamber fluidly connected to the second inlet; a second internal valve body circumferentially surrounding the second valve chamber; a second outlet; and a second piston for adjusting a rate of flow of air through the second direct acting valve, wherein the second piston is slidably engaged with the second internal valve body, and further wherein the second direct acting valve is fluidly connected to the first direct acting valve in a series configuration such that the second inlet of the second direct acting valve is directly connected to the first outlet of the first direct acting valve; and a second control valve assembly fluidly connected to the second valve chamber of the second direct acting valve; a first lip element disposed on an upstream end of the first piston, the first lip element for sealing engagement with first internal valve body of the first direct acting valve, wherein a first axial face of the first lip element extends at an angle θ
LIP between a first plane extending in an axial direction and the first axial face of the first lip element; andwherein the first axial face of the first internal valve body extends at an angle θ
VB between a second plane extending in an axial direction and the first axial face of the first internal valve body, further wherein an expansion angle θ
EXP equivalent to the difference between angle θ
LIP and angle θ
VB comprises an angle from 15°
to 60°
.- View Dependent Claims (2, 3, 4, 5, 6)
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7. An anti-icing system of a nacelle inlet of an engine of an aircraft, wherein the anti-icing system comprises:
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a valve assembly fluidly connected to the nacelle inlet, wherein the valve assembly comprises; a first direct acting valve comprising; a first inlet; a first valve chamber fluidly connected to the first inlet; a first internal valve body circumferentially surrounding the first valve chamber; a first outlet; and a first piston for adjusting a rate of flow of air through the first direct acting valve, wherein the first piston is slidably engaged with the first internal valve body; a first control valve assembly fluidly connected to the first valve chamber of the first direct acting valve; a second direct acting valve comprising; a second inlet; a second valve chamber fluidly connected to the second inlet; a second internal valve body circumferentially surrounding the second valve chamber; a second outlet; and a second piston for adjusting a rate of flow of air through the second direct acting valve, wherein the second piston is slidably engaged with the second internal valve body, and further wherein the second direct acting valve is fluidly connected to the first direct acting valve in a series configuration such that the second inlet of the second direct acting valve is directly connected to the first outlet of the first direct acting valve; and a second control valve assembly fluidly connected to the second valve chamber of the second direct acting valve; a second lip element disposed on an upstream end of the second piston, the second lip element for sealing engagement with second internal valve body of the second direct acting valve, wherein a second axial face of the second lip element extends at an angle θ
LIP between a first plane extending in an axial direction and the second axial face of the second lip element; anda second axial face of the second internal valve body, wherein the second axial face of the second internal valve body extends at an angle θ
VB between a second plane extending in an axial direction and the second axial face of the second internal valve body, further wherein an expansion angle θ
EXP equivalent to the difference between angle θ
LIP and angle θ
VB comprises an angle from 15°
to 60°
. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification