Abstract:
A check valve includes a valve body, a pair of stoppers, a hinge pin, and one or more flappers. The valve body includes an inlet end, an outlet end, and an inner surface that defines a flow passage between the inlet end and the outlet end. The inner surface further defines a valve seat adjacent the inlet end. The stoppers are integrally formed on the valve body inner surface, and each has a first end and a second end. The hinge pin is disposed within each hinge pin opening and extends across the flow passage. The flappers are disposed within the flow passage and are rotationally mounted on the hinge pin. Each of the one or more flappers is rotatable between a closed position, in which the flapper engages the valve seat, and a full-open position, in which the flapper engages the pair of stoppers.
Abstract:
A check valve includes a valve body, a pair of stoppers, a hinge pin, and one or more flappers. The valve body includes an inlet end, an outlet end, and an inner surface that defines a flow passage between the inlet end and the outlet end. The inner surface further defines a valve seat adjacent the inlet end. The stoppers are integrally formed on the valve body inner surface, and each has a first end and a second end. The hinge pin is disposed within each hinge pin opening and extends across the flow passage. The flappers are disposed within the flow passage and are rotationally mounted on the hinge pin. Each of the one or more flappers is rotatable between a closed position, in which the flapper engages the valve seat, and a full-open position, in which the flapper engages the pair of stoppers.
Abstract:
A system for controlling lubricant flow to a component in a gas turbine engine includes a control valve, an electromechanical actuator, and an engine controller. The control valve includes a lubricant inlet that is in fluid communication with a pressurized lubricant source, a lubricant outlet is in fluid communication with the gas turbine engine component, and a valve element that is movable to a plurality of valve positions. The electromechanical valve actuator is coupled to the valve element and is responsive to actuator commands to position the valve element. The engine controller is coupled to receive a pressure sensor signal indicative of a compressor pressure in the gas turbine engine and, in response, determines a commanded valve element position and supplies the actuator commands to the electromechanical valve actuator that cause the electromechanical valve actuator to move the valve element to the commanded valve element position.