An apparatus having a shaft, a bearing sleeve for rotatably supporting the shaft, a housing, in which at least one part of the bearing sleeve is arranged, and a sealing element, which seals a gap between a wall of the housing and the bearing sleeve. The sealing element divides the gap gas-tight into a first partial space adjacent to the front side of the sealing element and a second partial space adjacent to the back side of the sealing element, the sealing element having a flexible part, which is in contact with the wall of the housing and/or the bearing sleeve, and the housing having a first barrier gas inlet for introducing barrier gas into the first partial space as well as a second barrier gas inlet for introducing barrier gas into the second partial space.

An apparatus having a shaft, a bearing sleeve for rotatably supporting the shaft, a housing, in which at least one part of the bearing sleeve is arranged, and a sealing element, which seals a gap between a wall of the housing and the bearing sleeve. The sealing element divides the gap gas-tight into a first partial space adjacent to the front side of the sealing element and a second partial space adjacent to the back side of the sealing element, the sealing element having a flexible part, which is in contact with the wall of the housing and/or the bearing sleeve, and the housing having a first barrier gas inlet for introducing barrier gas into the first partial space as well as a second barrier gas inlet for introducing barrier gas into the second partial space.

A portable air flow meter fabricated using a 3D printer. A nozzle cover, a fixing cover, and a handle are formed integrally with a cylindrical housing in which a multi-nozzle for measuring an air flow is installed. The cylindrical housing is fabricated using a 3D printer. Fabrication costs are reduced, and a fabrication period is reduced. The portable air flow meter has superior portability due to light weight, and is effective in terms of usability.

A turbine generator assembly for generating power from a fluid flow, the assembly comprising: a housing for directing fluid flow, a turbine generator having a longitudinal axis of extension, enclosed in said housing, said turbine generator comprising: a plurality of blades provided on a central rotational axis being parallel with the longitudinal axis, a rotor, and a stator arranged peripherally and annular to the rotor; at least one of the plurality of blades being provided in fixed arrangement with the rotor, and wherein the stator of the turbine generator comprises a plurality of segments each having a coil length parallel to the longitudinal axis of the turbine, and a radial coil thickness, wherein at least two stator segments have different coil lengths and/or thickness to each other.

A flowmeter system that includes a flowmeter body defining a central bore. A plurality of flanges couple to the flowmeter body. The flowmeter body and the plurality of flanges form a one-piece structure without welded joints. A rotor within the central bore of the flowmeter body. A first vane within the central bore of the flowmeter body. The first vane couples to and supports the rotor within the flowmeter body. The flowmeter body, the flanges, the rotor, and the first vane comprise additive structures.

A flowmeter system that includes a flowmeter body defining a central bore. A plurality of flanges couple to the flowmeter body. The flowmeter body and the plurality of flanges form a one-piece structure without welded joints. A rotor within the central bore of the flowmeter body. A first vane within the central bore of the flowmeter body. The first vane couples to and supports the rotor within the flowmeter body. The flowmeter body, the flanges, the rotor, and the first vane comprise additive structures.

A flowmeter for use downhole estimates fluid flow with a helically shaped spinner member disposed in a path of the flowing fluid. Features, such as magnets, are mounted in the spinner member so that spinner member rotational rate can be sensed, thereby estimating fluid flow. Discontinuities along an axis of the spinner member define segments that are adjacent one another. Adjacent segments can differ angularly, by pitch, as well as by length. With the discontinuities, segment design is less constrained by the geometry of adjacent segments, so that feature locations on the spinner member are maintained, while maximizing sensitivity of the spinner member to fluid flow.

A flowmeter for use downhole estimates fluid flow with a helically shaped spinner member disposed in a path of the flowing fluid. Features, such as magnets, are mounted in the spinner member so that spinner member rotational rate can be sensed, thereby estimating fluid flow. Discontinuities along an axis of the spinner member define segments that are adjacent one another. Adjacent segments can differ angularly, by pitch, as well as by length. With the discontinuities, segment design is less constrained by the geometry of adjacent segments, so that feature locations on the spinner member are maintained, while maximizing sensitivity of the spinner member to fluid flow.

A system includes sensors for monitoring signals, and a processing system executes one or more methods for identification of system events, from the signals, corresponding to state changes and performance of the system and/or its subcomponents. Event identification is performed with classification and/or other machine learning algorithms, with generation of novel training data sets. The sensor(s) can also be used to determine power consumption information about the system and/or its subcomponents. The system processes event-associated outputs for execution of actions for improving system performance, along with other downstream applications.

A system includes sensors for monitoring signals, and a processing system executes one or more methods for identification of system events, from the signals, corresponding to state changes and performance of the system and/or its subcomponents. Event identification is performed with classification and/or other machine learning algorithms, with generation of novel training data sets. The sensor(s) can also be used to determine power consumption information about the system and/or its subcomponents. The system processes event-associated outputs for execution of actions for improving system performance, along with other downstream applications.