Abstract: A movable vane control system is disclosed for use with a gas turbine engine having a turbine axis of rotation. The system includes a plurality of rotatable turbine vanes in a gas flow path within a turbine case of the gas turbine engine. A first vane position sensor having a first distance sensor is configured to sense the distance between the first distance sensor and a surface portion of a first of said plurality of vanes or a first movable target connected to the first vane. Additionally, the first distance sensor, the first vane surface portion, the first movable target, or a combination thereof is configured to provide a variable distance between the first distance sensor and the first vane surface portion or first movable target that varies as a function of a position of the first vane.

Abstract: A bleed valve for a gas turbine engine compressor has a valve body and a flapper. The valve body defines a flow path and includes a flapper seat. The flow path extends through the valve body. The flapper is pivotally connected to the valve body and is movable between a closed position and an open position. In the closed position the flapper seats against the flapper seat and blocks the flow path. In the open position the flapper is angled towards the valve body inlet such that fluid moving through the valve body exerts force on the flapper, urging the flapper towards the closed position.

Abstract: A valve assembly includes a valve body having a valve body central axis. A valve actuator is operably connected to the valve body and is located such that a central axis of the valve actuator is nonparallel to the valve body central axis. A strut extends from the valve body to the valve actuator to support the valve actuator in a fixed relationship to the valve body. A pneumatically-actuated butterfly valve includes a valve body having a valve body central axis and a valve disc. A pneumatic actuator is located such that its central axis is nonparallel to the valve body central axis. The actuator includes a piston disposed in a cylinder, the piston operably connected to the valve disc. A strut extends from the valve body to support the actuator in a fixed relationship to the valve body.

Abstract: A high pressure relief valve includes a nozzle that is received within an internal bore of a valve housing. The nozzle has a nozzle body with a bore defined by an outlet bore inner diameter that is less than an inlet bore inner diameter. The nozzle body has a nozzle face defined at the outlet end, and is defined between the outlet bore inner diameter and an outlet bore outer diameter spaced radially outwardly of the outlet bore inner diameter. The nozzle body includes a coupling feature held fixed relative to the nozzle body such that the coupling feature is not moveable relative to the nozzle body. The coupling feature is configured to couple the nozzle body to the closure sleeve that surrounds the outlet end. At least one retaining feature prevents the coupling feature from being uncoupled from the closure sleeve.

Abstract: In one featured embodiment, a nozzle for a valve comprises a nozzle body surrounding a center axis and defined by an overall length extending from an inlet end to an outlet end. The nozzle body has a nozzle bore defined by an outlet bore inner diameter at the outlet end and an inlet bore inner diameter at the inlet end. The inlet bore inner diameter is greater than the outlet bore inner diameter, and the nozzle body has a nozzle face defined at the outlet end. The nozzle face is defined between the outlet bore inner diameter and an outlet bore outer diameter spaced radially outwardly of the outlet bore inner diameter. A ratio of the outlet bore inner bore diameter to the outlet bore outer diameter at the nozzle face is between 0.95 and 0.98.

Abstract: A gas turbine engine shut-down system includes a pump configured to draw a flow of fuel from a source, a fuel nozzle configured to receive the flow of fuel from the pump, a fuel shut-off valve in fluid communication with the pump, a recirculation circuit for circulating excess fuel to a location upstream of the pump; a solenoid valve in communication with the pump and the recirculation circuit; and a fuel-bypass valve. The fuel-bypass valve includes a first opening connected to the fuel pump, a second opening connected to the fuel shut-off valve, a third opening connected to the recirculation circuit, a fourth opening connected to the solenoid valve, and a piston disposed within the fuel-bypass valve and movable between a plurality of positions.

Abstract: A measuring system for sensing vane positions that comprises a turbine, a target, and a sensor. The turbine includes a plurality of articulating vanes, with each vane being coupled to a sync ring that is configured to position the plurality of articulating vanes in accordance with a degree of rotation by the sync ring. The target is coupled to a first position of the turbine within a first region that is associated with a first vane of the plurality of articulating vanes. The sensor is coupled via a bracket to a second position of the turbine within the first region. The sensor is configured to detect an orientation of the target that corresponds to a vane position of the first vane.

Abstract: In one featured embodiment, a closure sleeve for a valve comprises a sleeve body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end. The sleeve body has an internal cavity that is enclosed at the downstream end and is open at the upstream end. The internal cavity is defined in part by a piston contact surface that is defined by an inner diameter. The piston contact surface is configured to slide against a piston to be received within the internal cavity, and a ratio of the inner diameter to the overall length is between 1.0 and 1.5.

Abstract: A bleed valve assembly includes a flow duct with an inlet and an outlet disposed downstream from the inlet. The outlet is smaller in cross-sectional area than a region of the flow duct disposed between the inlet and the outlet. A piston housing is disposed inside the flow duct between the inlet and the outlet so as to form an annular flow passage between the flow duct and the piston housing. The piston housing is axially aligned with a center axis of the flow duct. At least one rib extends between the flow duct and the piston housing. A sleeve piston is disposed inside the piston housing and is configured to extend downstream of the piston housing in a closed position. The sleeve piston comprises an outer wall that is at least the same in cross-sectional area as the outlet of the flow duct.

Abstract: A fuel metering valve includes a main flow path extending axially between an inlet and an outlet. Also included is a plunger disposed around a portion of a plunger guide, the plunger and the plunger guide configured to translate between an open position and a closed position to selectively distribute a fuel flowing through the main flow path to the outlet of the fuel metering valve. Further included is a solenoid coil disposed between a solenoid outer body and a solenoid inner body, the solenoid coil configured to magnetically attract the plunger to the open position. Yet further included is a secondary flow path for routing a stagnant volume of fuel upon translation of the plunger from the closed position to the open position.

Abstract: In one aspect, a pressure regulating valve assembly is provided. The valve assembly includes a housing having a fluid inlet and a fluid outlet, a sleeve positioned within the housing, and a spool at least partially positioned within the sleeve. The spool includes an outer surface having a shoulder, and the spool is configured to translate within the sleeve between a closed position and an open position. The valve assembly further includes a cap coupled to the sleeve and surrounding at least a portion of the spool, and the cap includes an inner surface with a flange extending therefrom. In the closed position the spool shoulder abuts against the cap flange to define a sealed metering edge. In the open position the spool shoulder is spaced from the cap flange to unseal the metering edge and define a metering window to facilitate fluid flow therethrough to the fluid outlet.

Abstract: A fuel control system includes a high pressure relief valve fluidly connected to a fuel pump outlet. The high pressure relief valve includes a closure and a nozzle. The closure has an opening and a locking notch defined by a circumferential wall. The nozzle has a base portion that is received within the opening and has a rim extending between a first surface and a second surface. The nozzle has a tab extending from the rim that is received within the locking notch.

Abstract: A bleed valve includes inlet and outlet housings, a hollow shaft defining a valve axis, and a full-area piston. The shaft includes a first end mounted to an inner diameter portion of the inlet housing and a second end mounted to an end cap of the outlet housing. The piston is slidably mounted to the shaft. A first chamber is defined between an upstream side of the piston and the inner diameter portion of the inlet housing. A second chamber is defined between a downstream side of the piston and the end cap of the outlet housing. An area of an upstream surface of the piston at an angle with respect to the valve axis is in fluid communication with the first chamber, and is substantially equal to an area of a downstream surface of the piston at an angle with respect to the valve axis and in fluid communication with the second chamber.

Abstract: A valve assembly includes a sleeve with an inlet and an outlet. A spool is slideably disposed within an interior of the sleeve and is movable along a spool movement axis defined by the sleeve between first and second positions such a flow area between the inlet and outlet is greater when the spool is in the second position than when the spool is in the first position. An aperture plate seats within the sleeve inlet and is axially adjacent to the spool. The aperture plate defines a core flow and a flow-directing aperture to center and straighten a fluid flow entering the sleeve inlet.

Abstract: A device and method for measuring the rotational position of a rotating feature, the device employing rotary to linear magnification. A connecting member is operatively connected to the rotating feature, the connecting member extending through one or more structural layers of an enclosure. An arm is operatively connected to the connecting member and located outside the enclosure. A target is arranged with respect to a position sensor, with the position sensor configured to measure the linear position of the target with respect to the position sensor. A cable is connected to the arm at an attachment point, the cable also being connected to the target. One or more pulleys are arranged to control the path of the cable between the attachment point on the arm and the target.

Abstract: A sensor assembly includes a first structure and a second structure disposed radially outwardly of the first structure. Also included is a sensor body extending through the first and second structures, the sensor body having first and second ends, the second end disposed in an ambient environment. Further included is a first sealing assembly configured to couple the sensor body to the second structure and to accommodate movement of the sensor body due to relative movement between the first and second structures. Yet further included is an interior cavity defined by an interior wall of the sensor body and a rotary position sensor mounted to the sensor body proximate the second end of the sensor body, the rotary position sensor configured to detect an angular position of a target disposed within the first environment, the rotary position sensor coupled to the target with a sensor linkage assembly.

Abstract: A sensor assembly includes a first structure and a second structure disposed radially outwardly of the first structure. Also included is a sensor body extending through the first and second structures, the sensor body having first and second ends, the second end disposed in an ambient environment. Further included is a sensor mounted to the sensor body proximate the second end, the sensor configured to detect a characteristic of a target disposed within the first structure. Yet further included is a first sealing assembly configured to operatively couple the sensor body to the second structure and to accommodate movement of the sensor body. The first sealing assembly includes a mounting body, a radial seal, a slider plate and a slider plate retainer disposed in a recess of the mounting body and in abutment with the slider plate.

Abstract: A sensor assembly includes a first structure and a second structure disposed radially outwardly of the first structure. Also included is a sensor body extending through the first and second structures, the sensor body having first and second ends, the first end disposed proximate a first environment defined by the first structure and the second end located radially outwardly of the second structure. Further included is a first sealing assembly configured to operatively couple the sensor body to the second structure and to accommodate movement of the sensor body. Yet further included is a position sensor operatively coupled to the sensor body, the position sensor configured to determine a position of a target located within the first interior volume. Also included is at least one biasing member in contact with the target to bias the target into constant operative contact with the sensor body.

Abstract: A fluid metering valve includes a flow circuit defined by the valve and a valve member disposed in the flow circuit, the valve member having a sealing portion and configured to be moved by a solenoid between a closed position and one or more open positions. The valve includes a seat member defining one or more fluid outlets, the seat member configured to receive the sealing portion in the closed position to seal the fluid outlets, and an internal porting path defined through the sealing portion that is configured to fluidly connect a downstream side of the sealing portion with an upstream portion of the flow circuit in the closed position to reduce the effective pressure area of the valve member.

Abstract: A flexure includes a flexure body with an inner ring defining a main axis and an outer ring extending about the inner ring that is outboard of the inner ring with respect to the main axis. One or more flexure members having respective lengths that are greater than a radial offset distance defined between the inner ring and the outer ring connects the inner ring to the outer ring. A valve includes a valve member connected to a valve body by the flexure.