VARIABLE DISPLACEMENT PUMP (VDP) SYSTEMS WITH DUAL DRY OUT PUMPS

    公开(公告)号:US20250084838A1

    公开(公告)日:2025-03-13

    申请号:US18244390

    申请日:2023-09-11

    Abstract: A fuel system includes a main fuel pump sub-system (MFP) with an inlet for receiving a supply of fuel from an inlet line. The MFP has a main outlet line configured to supply fuel to a main fuel throttle valve assembly (MFTV), a first cross-over outlet line, and a second cross-over outlet line. An augmentor fuel pump sub-system (ABFP) has an inlet connected in fluid communication with the first cross-over outlet line, and an outlet connected in fluid communication with a main augmentor supply line. A variable displacement pump sub-system (VDPP) has an inlet connected in fluid communication with the second cross-over outlet line, a first outlet line configured to connect to supply fuel to the MFTV, and a second outlet line configured to connect to supply fuel to an actuation system.

    ELECTRICAL ACTUATION OF VARIABLE STATOR VANES

    公开(公告)号:US20240426225A1

    公开(公告)日:2024-12-26

    申请号:US18214064

    申请日:2023-06-26

    Abstract: A system for vane pitch actuation includes an electric motor with a rotary output shaft defining a drive axis. A worm shaft defines a drive axis, and is operatively connected to be driven in rotation about the drive axis by the rotary output shaft of the electric motor. A sync ring is defined about an engine axis that is orthogonal to the drive axis. The sync ring is configured to rotate about the engine axis over a range of positions for driving a plurality of variable pitch stator vanes to each have a pitch based on position of the sync ring. The sync ring includes a plurality of gear teeth for actuation of the sync ring by the electric motor.

    Fuel system having variable displacement pump failure modes

    公开(公告)号:US12031487B1

    公开(公告)日:2024-07-09

    申请号:US18214250

    申请日:2023-06-26

    CPC classification number: F02C7/232 F02C7/236 F02C9/30 F05D2260/84

    Abstract: A fuel system can include a main fuel pump (MFP) configured to output main flow to a main line, an augmentor fuel pump (AFP) configured to output an augmenter flow to an augmenter line, and a variable displacement pump assembly (VDPP) in fluid communication with the AFP via the augmentor line to receive the augmentor flow. The VDPP can include a variable displacement pump (VDP) configured to output a VDP flow to a VDP output line. The system can include a main fuel throttle valve assembly (MFTV) in fluid communication with the main fuel pump via the main line to receive the main flow and in fluid communication with the VDPP via a backup line. The MFTV can be in fluid communication with an engine line, an actuation assembly in fluid communication with the VDPP via an actuation line to receive an actuation flow.

    DUAL FUEL PUMP SYSTEM FOR AN AIRCRAFT
    4.
    发明公开

    公开(公告)号:US20230417190A1

    公开(公告)日:2023-12-28

    申请号:US17846583

    申请日:2022-06-22

    CPC classification number: F02C7/236 F02C7/222 F05D2220/323 F02C9/44 F02C7/232

    Abstract: According to an aspect, a dual fuel pump system includes a primary run-dry fuel pump having multiple stages, each of the stages configured to produce fuel pressure between a pump stage inlet and a pump stage outlet, and at least one of the stages operable in a run-dry mode. A secondary run-dry fuel pump is operable in run-dry mode, where the secondary run-dry fuel pump is mechanically driven by an accessory gearbox of an engine of the aircraft. An electric motor is operably coupled to the primary run-dry fuel pump and configured to drive rotation of the stages of the primary run-dry fuel pump. A controller is configured to pressurize fuel using a single stage of the primary run-dry fuel pump, pressurize fuel using at least two stages of the primary run-dry fuel pump, and pressurize fuel using the secondary run-dry fuel pump under various operating conditions.

    Three pump fuel systems with selectable main and augmentor pumps

    公开(公告)号:US12209538B1

    公开(公告)日:2025-01-28

    申请号:US18244531

    申请日:2023-09-11

    Abstract: A fuel system includes a main fuel pump sub-system (MFP) with an inlet for receiving a supply of fuel from an inlet line. The MFP has a main outlet line configured to supply fuel to a main fuel throttle valve assembly (MFTV), and a cross-over outlet line. An augmentor fuel pump sub-system (ABFP) has an inlet connected in fluid communication with the cross-over outlet line, and an outlet connected in fluid communication with a main augmentor supply line. A actuation fuel pump sub-system (AFP) has an inlet connected in fluid communication with a branch of the main outlet line, an outlet line with a first outlet line branch configured to connect to supply fuel to the MFTV, and a second outlet line branch configured to connect to supply fuel to an actuation system.

    FLUID PUMP SYSTEMS
    7.
    发明申请

    公开(公告)号:US20240392776A1

    公开(公告)日:2024-11-28

    申请号:US18202661

    申请日:2023-05-26

    Abstract: A fluid pump system can include a controllable pump configured to generate a pump flow through the controllable pump and to output an output flow to an output line. The fluid pump system can include a flow split system configured to be in fluid communication with the controllable pump in a bypass state such that the flow split system is configured to divert a portion of the pump flow to maintain a desired output flow to the output line but to also allow the controllable pump to maintain a minimum pump flow through the controllable pump to maintain pump temperature below a high temperature threshold.

    DIRECT CONTROLLED VARIABLE DISPLACEMENT PUMPS WITH THERMOSTATICALLY CONTROLLED BYPASS

    公开(公告)号:US20240392775A1

    公开(公告)日:2024-11-28

    申请号:US18202477

    申请日:2023-05-26

    Abstract: A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. The VDP includes a variable displacement mechanism configured to vary pressure to the outlet line. A bypass valve (BPV) includes a BPV inlet in fluid communication with the outlet line, and a BPV outlet in fluid communication with a bypass line that feeds into the inlet line upstream of the VDP. The BPV includes a thermostatic actuator configured to control recirculation flow amount through the BPV based on fluid temperature in the BPV. A method includes thermostatically controlling a bypass valve (BPV) to recirculate flow from the outlet line to an input line of the VDP in the event of flow demanded by the downstream system dropping below a predetermined low threshold of flow through the VDP based on fluid temperature in the BPV.

    DIRECT CONTROLLED VARIABLE DISPLACEMENT VALVES WITH DUAL SET POINT PRESSURE RELIEF

    公开(公告)号:US20240392773A1

    公开(公告)日:2024-11-28

    申请号:US18202513

    申请日:2023-05-26

    Abstract: A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. The VDP includes a variable displacement mechanism configured to vary pressure to the outlet line. A relief valve (RV) includes an RV inlet in fluid communication with the outlet line, and an RV outlet in fluid communication with a bypass line that feeds into the inlet line upstream of the VDP. An actuator is operatively connected to control the RV to change function of the RV between a first function and a second function. The first function is a high pressure relief valve function. The second function is as a wind milling bypass function. A controller is operatively connected to the actuator to control the RV to change back and forth between the first function and the second function.

    PRESSURE SENSITIVE STOP STROKE FOR VARIABLE DISPLACEMENT PUMPS

    公开(公告)号:US20240392772A1

    公开(公告)日:2024-11-28

    申请号:US18202404

    申请日:2023-05-26

    Abstract: A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. The VDP includes a variable displacement mechanism configured to vary pressure to the outlet line. The VDP includes a variable stop configured to vary minimum displacement of the variable displacement mechanism based on position of the variable stop relative to a housing of the VDP. A pressure sensing valve (PSV) is operatively connected between the inlet line and the outlet line to actuate a stop member to adjust stopping position of the variable stop based on pressure differential between the inlet line and the outlet line.

Patent Agency Ranking