Staged cooling flow nozzle valve

Patent metadata

Field	Value
Publication number	US-10907824-B2
Application number	US-201213588355-A
Country	US
Kind code	B2
Filing date	Aug 17, 2012
Priority date	Aug 19, 2011
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A fuel split control arrangement is provided. The arrangement includes a staged cooling flow control valve and cooling check valve. The staged cooling flow control valve and cooling check valve is connected between the primary and secondary tips of a nozzle in a turbine engine. The staged cooling flow control valve and cooling check valve includes a valve member arrangement operable to prevent fuel flow from the secondary fuel supply manifold to the secondary tip and simultaneously allow fuel flow from the secondary fuel supply manifold to the primary tip such that the primary tip receives fuel flow from both the secondary fuel supply manifold and the primary fuel supply manifold.

First claim

What is claimed is:

1. A control valve for regulating fuel flow between a primary tip and a secondary tip of an injection nozzle, the control valve comprising:
an inlet flow path;
a primary flow path operably coupled to the inlet flow path;
a secondary flow path operably coupled to the inlet flow path and the primary flow path;
a first valve member movable to selectively open and close a passage between the inlet flow path and the secondary flow path; and
a second valve member movable to selectively open and close a passage between the inlet flow path and the primary flow path;
further comprising:
a housing having an internal cavity and an inlet in fluid communication with the inlet flow path, a secondary tip port in fluid communication with the secondary flow path, and a primary tip port in fluid communication with the primary flow path, each of the inlet, the secondary tip port, and the primary tip port being in fluid communication with the internal cavity;
wherein the first valve member includes an internal bore, the first valve member slidably disposed within the internal cavity and movable to selectively open and close a flow path between the inlet and the secondary tip port;
wherein the second valve member is slidably disposed within the internal bore of the first valve member, the second valve member movable to selectively open and close a flow path between the inlet and the primary tip port; and
further comprising a stem extending into the internal bore of the first valve member and extending into abutted contact with the second valve member, wherein the stem includes a radially outwardly extending flange, and the first valve member includes a radially inwardly extending flange within the internal bore thereof, the radially inwardly extending flange having first and second surfaces in an axially opposed spaced relationship, the first surface facing the radially outwardly extending flange of the stem, the second surface facing the second valve member.

2. The control valve of claim 1 , wherein the second valve member has a high pressure closed position wherein the flow path between the inlet and the primary tip port is closed and wherein the second valve member is in abutted contact with the stem and the radially outwardly extending flange of the stem is spaced away from the first surface of the radially inwardly extending flange.

3. The control valve of claim 1 , wherein the second valve member has a low pressure closed position wherein the flow path between the inlet and the primary tip port is closed and wherein the second valve member is spaced away from a terminal end of the stem and the stem is in abutted contact with the first surface.

4. A control valve for regulating fuel flow between a primary tip and a secondary tip of an injection nozzle, the control valve comprising:
an inlet flow path;
a primary flow path operably coupled to the inlet flow path;
a secondary flow path operably coupled to the inlet flow path and the primary flow path;
a first valve member movable to selectively open and close a passage between the inlet flow path and the secondary flow path; and
a second valve member movable to selectively open and close a passage between the inlet flow path and the primary flow path;
further comprising:
a housing having an internal cavity and an inlet in fluid communication with the inlet flow path, a secondary tip port in fluid communication with the secondary flow path, and a primary tip port in fluid communication with the primary flow path, each of the inlet, the secondary tip port, and the primary tip port being in fluid communication with the internal cavity;
wherein the first valve member includes an internal bore, the first valve member slidably disposed within the internal cavity and movable to selectively open and close a flow path between the inlet and the secondary tip port;
wherein the second valve member is slidably disposed within the internal bore of the first valve member, the second valve member movable to selectively open and close a flow path between the inlet and the primary tip port; and
wherein the second valve member includes first and second radial ports connected by a common passageway, wherein the first radial port is closed by the first valve member when the second valve member moves in a first direction relative to the first valve member, and wherein the second radial port is closed by the first valve member when the second valve member moves in a second direction opposite the first direction.

5. A control valve for regulating fuel flow between a primary tip and a secondary tip of an injection nozzle, the control valve comprising:
an inlet flow path;
a primary flow path operably coupled to the inlet flow path;
a secondary flow path operably coupled to the inlet flow path and the primary flow path;
a first valve member movable to selectively open and close a passage between the inlet flow path and the secondary flow path; and
a second valve member movable to selectively open and close a passage between the inlet flow path and the primary flow path;
further comprising:
a housing having an internal cavity and an inlet in fluid communication with the inlet flow path, a secondary tip port in fluid communication with the secondary flow path, and a primary tip port in fluid communication with the primary flow path, each of the inlet, the secondary tip port, and the primary tip port being in fluid communication with the internal cavity;
wherein the first valve member includes an internal bore, the first valve member slidably disposed within the internal cavity and movable to selectively open and close a flow path between the inlet and the secondary tip port;
wherein the second valve member is slidably disposed within the internal bore of the first valve member, the second valve member movable to selectively open and close a flow path between the inlet and the primary tip port; and
further comprising a sleeve surrounding the first and second valve members and including a radial port aligned with the secondary tip port.

6. The control valve of claim 5 , wherein the sleeve and first valve member each commonly seal with a first axial face seal, and wherein the first valve member is movable out of sealing engagement with the first axial face seal.

7. A staged cooling flow control valve for regulating fuel flow between a primary tip and a secondary tip of an injection nozzle, the staged cooling flow control valve comprising:
a housing having an internal cavity and an inlet, a secondary tip port, and a primary tip port in fluid communication with the internal cavity;
a first valve member disposed within the internal cavity and movable to selectively open a flow path between the inlet and the secondary tip port at a first pressure differential between the inlet and the primary tip port; and
a second valve member disposed within the internal cavity and movable to selectively open a flow path between the inlet and the primary tip port at a second pressure differential between the inlet and the primary tip port, the second pressure differential less than the first pressure differential.

8. A staged cooling flow control valve for regulating fuel flow between a primary tip and a secondary tip of an injection nozzle, the staged cooling flow control valve comprising:
a housing having an internal cavity and an inlet, a secondary tip port, and a primary tip port in fluid communication with the internal cavity;
a first valve member disposed within the internal cavity and movable to selectively open a flow path between the inlet and the secondary tip port at a first pressure differential between the inlet and the primary tip port;
a second valve member disposed within the internal cavity and movable

Assignees

• Snodgrass Brett Jay
• Carson Charlie
• Baker Carthel C
• Garry Michael P
• Woodward Inc

Inventors

• Snodgrass Brett Jay
• Carson Charlie
• Baker Carthel C
• Garry Michael P

Classifications

• F23R2900/00004

  Preventing formation of deposits on surfaces of gas turbine components, e.g. coke deposits · CPC title

• F23D11/38 Primary

  Nozzles; Cleaning devices therefor · CPC title

• F02C7/232

  Fuel valves {(control of fuel supply by means of fuel metering valves F02C9/263)}; Draining valves or systems (valves in general F16K) · CPC title

• F23R3/343

  Pilot flames, i.e. fuel nozzles or injectors using only a very small proportion of the total fuel to insure continuous combustion (ignition in gas-turbine plants F02C7/264; pilot flame igniters F23Q9/00) · CPC title