Abstract: A turbomachine face seal includes a turbine wheel with a cylindrical shaft extending from the turbine wheel, defining an axis of rotation. The shaft may include a heat throttle, such as a piston ring and groove assembly, or a shaft weld pocket having an annular heat choke groove. Circumscribing the shaft is a casing and a seal ring having a groove with a seal element. To cool the seal element, a pressurized oil jet is directed toward the casing, and impinges against the casing. The oil jet may be angled or parallel with the axis of rotation. The casing may be configured to trap oil from the oil jet to cool the seal element.

Abstract: A turbomachine face seal includes a turbine wheel with a cylindrical shaft extending from the turbine wheel, defining an axis of rotation. The shaft may include a heat throttle, such as a piston ring and groove assembly, or a shaft weld pocket having an annular heat choke groove. Circumscribing the shaft is a casing and a seal ring having a groove with a seal element. To cool the seal element, a pressurized oil jet is directed toward the casing, and impinges against the casing. The oil jet may be angled or parallel with the axis of rotation. The casing may be configured to trap oil from the oil jet to cool the seal element. A second oil jet may be used for additional cooling. Alternatively, the turbomachine face seal may include a bellows, positioned between the casing and the shaft, which restricts entry of gasses and contaminants into the face seal.

Abstract: A lubrication system for a fluid turbine is provided. The system includes a supply subsystem for providing oil via an oil tank or a hydraulic accumulator to a gearbox of the fluid turbine for lubrication during at least one of idling or loss of electric grid. The system also includes a control subsystem for controlling the flow in the lubrication system.

Abstract: A drivetrain for a wind turbine and a method for lubricating a bearing in a drivetrain of a wind turbine are disclosed. The drivetrain includes a rotatable component and a bearing surrounding the rotatable component. The drivetrain further includes a lubrication passage in fluid communication with the bearing for providing lubrication fluid thereto, and a drainage passage in fluid communication with the bearing for removing lubrication fluid therefrom. Further, the drivetrain includes a dry sump in fluid communication with the drainage passage. The dry sump includes a pump operable to flow lubrication fluid from the drainage passage.

Abstract: A lubrication system for a wind turbine is provided. The system includes a supply subsystem for providing oil via an oil tank or a hydraulic accumulator to a gearbox of the wind turbine for lubrication during at least one of idling or loss of electric grid. The system also includes a control subsystem for controlling the flow in the lubrication system.

Abstract: A lubrication system for a fluid turbine is provided. The system includes a supply subsystem for providing oil via an oil tank or a hydraulic accumulator to a gearbox of the fluid turbine for lubrication during at least one of idling or loss of electric grid. The system also includes a control subsystem for controlling the flow in the lubrication system.

Abstract: A capacity control valve (17) for use in a clutchless, variable capacity compressor includes a central rod plunger (34) that is shifted axially in one direction, against a spring (39), by an energized coil (40), when the compressor is in a greater than minimum capacity condition. For the minimum capacity position, the rod plunger (34) is released by the de energized coil (40) to be pushed by spring (39) in the opposite direction to a solid, pre determined position. A by pass passage (42) interconnecting a discharge pressure chamber (20) and a suction pressure chamber (26) runs in parallel to the rod plunger (34), normally closed off by its own spring loaded shut off valve (44). When the coil 40 is de energized to release the plunger (34), it engages the shut off valve, opening the by pass passage and opening the discharge pressure chamber (20 to the suction pressure chamber (26).