Ebara International Corporation

Sparks, NV, United States

Ebara International Corporation

Sparks, NV, United States
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Patent
Ebara International Corporation | Date: 2014-06-23

A rotor bar relief system and a method of manufacturing a squirrel-cage rotor including a rotor bar relief system are disclosed where a plurality of rotor bars affixed within corresponding slots of an end cap of the shaft of the rotor and where each of the rotor bars has a relief formed in the end of the rotor bar affixed to the slots of the end cap. The reliefs may have a variety of cross sections and the slots may have a variety of shapes. The reliefs can be formed as the rotor bars are extruded or subsequent to production of the rotor bars. The rotor bars may be further inserted along a substantial portion of their lengths into slots in laminations of a core around the shaft. The rotor bars can be used in induction engines or induction generators and are useful in cryogenic systems.


Patent
Ebara International Corporation | Date: 2014-03-24

A cryogenic turbine expander system which consists essentially of a cryogenic liquid pressure vessel, and the vessel further accommodating a turbine expander, an internal bypass configuration, which are operable in parallel, a three-way valve to direct incoming high pressure liquefied gas flow to the turbine expander, or the internal bypass configuration, which further consists a Joule-Thomson valve, when the turbine expander is not operational.


Patent
Ebara International Corporation | Date: 2014-03-24

A cryogenic turbine expander system which consists essentially of a cryogenic liquid pressure vessel, and the vessel further accommodating a turbine expander, an internal bypass configuration, which are operable in parallel, a three-way valve to direct incoming high pressure liquefied gas flow to the turbine expander, or the internal bypass configuration, which further consists a Joule-Thomson valve, when the turbine expander is not operational.


A power recovery system using the Rankine power cycle incorporating a two-phase liquid-vapor expander with an electric generator which further consists of a heat sink, a heat source, a working fluid to transport heat and pressure energy, a feed pump and a two-phase liquid-vapor expander for the working fluid mounted together with an electric generator on one rotating shaft, a first heat exchanger to transport heat from the working fluid to the heat sink, a second heat exchanger to transport heat from the heat source to the working fluid.


Patent
Ebara International Corporation | Date: 2015-09-24

A submerged electrical pump for liquefied hydrocarbon gasses that is adapted for use encompassing a range of different temperatures and viscosities is disclosed. Notable elements of some embodiments of multiple fluid pumps include bearings and bearing liners made from the same material, a motor larger enough to pump the most vicious and dense fluid, extra thick bearing liners, and a trial-and-error process for choosing other pump design specifications, such as impeller wear rings, bushings, and other critical radial clearances.


A power recovery system using the Rankine power cycle incorporating a two-phase liquid-vapor expander with an electric generator which further consists of a heat sink, a heat source, a working fluid to transport heat and pressure energy, a feed pump and a two-phase liquid-vapor expander for the working fluid mounted together with an electric generator on one rotating shaft, a first heat exchanger to transport heat from the working fluid to the heat sink, a second heat exchanger to transport heat from the heat source to the working fluid.


A power recovery system using the Rankine power cycle incorporating a two-phase liquid-vapor expander with an electric generator which further consists of a heat sink, a heat source, a working fluid to transport heat and pressure energy, a feed pump and a two-phase liquid-vapor expander for the working fluid mounted together with an electric generator on one rotating shaft, a first heat exchanger to transport heat from the working fluid to the heat sink, a second heat exchanger to transport heat from the heat source to the working fluid.


Patent
Ebara International Corporation | Date: 2013-08-01

An improvement for a turbine generator or pump having main bearings separated by a span of shaft and a thrust equalizing mechanism adjacent one of said main bearings, the improvement comprising a stationary length compensator interposed between the thrust equalizing mechanism and its adjacent main bearing to reduce the span between said main bearings. Preferably the length compensator is composed of material that shrinks less than the shaft of the generator, and the height of the length compensator, i.e., the compensating dimension, is selected according to desired thrust equalizing mechanism operating parameters over a temperature range.


Patent
Ebara International Corporation | Date: 2013-08-01

An improvement for a turbine generator or pump having main bearings separated by a span of shaft and a thrust equalizing mechanism adjacent one of said main bearings, the improvement comprising a stationary length compensator interposed between the thrust equalizing mechanism and its adjacent main bearing to reduce the span between said main bearings. Preferably the length compensator is composed of material that shrinks less than the shaft of the generator, and the height of the length compensator, i.e., the compensating dimension, is selected according to desired thrust equalizing mechanism operating parameters over a temperature range.


Patent
Ebara International Corporation | Date: 2013-08-07

An inducer for vertical flow, cryogenic liquid centrifugal pumps comprising a stationary outer housing portion having an inlet and an outlet, the inlet located at a lower end and the outlet located at an upper end, the housing further having an inner wall portion with one or more spiral vanes projecting outwardly from the inner wall portion, the one or more spiral vanes defining one or more gap regions on the inner wall portion that spiral in a first direction, and an inner rotating impeller mounted on a rotating center shaft, the impeller having at least one curved blade which defines a curved, helicoid plane surface in which the slope of the plane increases as the distance from the center axis increases, the impeller rotating in a second direction which is in counter rotation to the first direction.

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