A multi-stage charging device includes a shaft that is supported for rotation about an axis. The charging device also includes a first compressor wheel of a first compressor stage. The first compressor wheel is fixed on the shaft. Furthermore, the charging device includes a second compressor wheel of a second compressor stage. The second compressor wheel is fixed on the shaft. Additionally, the charging device includes a turbine wheel of a turbine section. The turbine wheel is fixed on the shaft in a back-to-back arrangement with the second compressor wheel.

A vibrorotational fluid flow actuator includes: a first vibrorotational component comprising a first body including an axis, a plurality of first legs extending from a bottom surface of first body in a direction of and at an angle to the axis, and a plurality of first blades extending from a respective side of the first body in a direction perpendicular to the axis, wherein when the first vibrorotational component is placed on a chassis, vibration of the chassis induces rotation of the body such that the blades and body rotate about the axis of the body thereby inducing fluid flow in a fluid surrounding the actuator.

A compact axial turbine configured to operate with high density working fluid is described. The turbine comprises an axial majority cantilevered turbomachinery shaft. Rotor assemblies and nozzle spacers communicate torque through turbine shaft splines, allowing them to be slid off the shaft for quick replacement in the field. The compact axial turbine houses turbomachinery within a separable inner casing encircled by a cartridge sleeve, thereby forming a cartridge which can itself be removed as a single component.

A bearing includes a bearing sleeve with a first portion and a second portion adjacent to the first portion. A bump foil extends along an inner face of the first portion of the bearing sleeve and a metal mesh extends along an inner face of the second portion of the bearing sleeve. A top foil extends along an inner face of the bump foil of the first portion and the metal mesh of the second portion.

Methods and systems are provided for a turbocharger system to reduce and balance axial thrust load on the turbine shaft and the associated bearing system and sealing. In one example, a partial back plate compressor may be used in combination with an axial turbine to reduce axial thrust load and to improve turbocharger transient response time. In another example, a regenerative turbocharger system with back-to-back turbo pump may be used to reduce and balance axial thrust load.

A gas turbine engine according to an example of the present disclosure includes, among other things, a propulsor section including a propulsor that delivers flow to a core flowpath and a compressor section including first and second compressors. The core flowpath passes through the first compressor. The core flowpath in the first compressor has an outer diameter relative to the engine longitudinal axis. The outer diameter has a slope angle relative to the axis.

A centrifugal gas compressor with rotating hollow housing and an independently rotating, turbine compresses gas bubbles in capillary tubes and recovers energy from the liquid drain (sometimes a liquid recycler). The housing rotatably retains an internal spool having the turbine. Gas-liquid emulsion fed to the capillaries generates compressed gas-liquid emulsion at a radially distal annular region in an annular lake within the spool. Compressed gas leaves the lake and is ported away. A turbine blade edge in spilt over liquid drives the turbine, converting angular velocity/momentum into shaft torque as recovered energy. Blade captured liquid is recycled to capillary inputs.

A turbo-compressor comprises a compressor wheel having an attachment arrangement for attaching the wheel to a drive shaft. The attachment arrangement includes an axially extending spigot internally radially located in a bore in the drive shaft and secured to the drive shaft by fastening means into the rear of the compressor wheel. Thus the compressor wheel expands and tightens into the shaft at speed. Furthermore, the nose of the compressor wheel is free to accept an aerodynamic profile.

A turbocharger includes a turbine housing defining a turbine housing interior, a turbine wheel disposed within the turbine housing interior, a shaft coupled to and rotatable by the turbine wheel, a compressor housing defining a compressor housing interior and a flow path, and a compressor wheel disposed within the compressor housing interior and coupled to the shaft. The compressor wheel has a hub coupled to the shaft, and a plurality of impeller blades extending radially from the hub. The plurality of impeller blades define an inducer end having an inducer diameter, and an exducer end having an exducer diameter greater than the inducer diameter. The inducer diameter and the exducer diameter establish a compressor trim. The compressor wheel also has a compressor wheel shroud disposed about the plurality of impeller blades. The compressor wheel shroud encloses the plurality of impeller blades to define a shroud interior.

A turbocharger includes a compressor housing, a turbo shaft, a bearing housing, a bearing cartridge, and a spacer. The compressor housing includes a backplate. The turbo shaft extends through the backplate and the bearing housing, and is rotatable about an axis. The backplate is positioned between an interior of the compressor housing and an interior of the bearing housing. The bearing cartridge is positioned in the bearing housing and rotatably supports the turbo shaft therein. The spacer is engaged with the bearing housing and an outer radial portion of the bearing cartridge to prevent rotation therebetween. The spacer includes a deflector formed integrally therewith that directs a lubricant axially away from the compressor housing.