Class / Patent application number | Description | Number of patent applications / Date published |
417365000 | Axial thrust balancing means for rotary pump and motor | 13 |
20090004032 | Deswirl mechanisms and roller bearings in an axial thrust equalization mechanism for liquid cryogenic turbomachinery - Vane, fin, and hole arrangements establish a predetermined reduced swirl at the inlet of mechanical seals and the inlet of a variable axial orifice gap which act in harmony as an axial thrust equalizing system for use in liquid cryogenic turbines and pumps. In said establishment the stiffness, damping, and inertia in said seal in conjunction with said variable orifice gap is manipulated, including the destabilizing cross-coupled stiffness which is reduced. Said seal is of either labyrinth annular type formed by a plurality of teeth, annular smooth, or a plurality diamond annular surface pattern. Said variable orifice gap is smooth. Liquid for the axial thrust equalizing seal is initially bled from the main to pass through a preset deswirl mechanism. The deswirl mechanism consists of either a plurality of vanes, fins, grooves, or circular holes that guide liquid radial inward before passing through said mechanical seal. After exiting the seal said liquid passes through a second deswirl mechanism consisting of a plurality of vanes, fins, or grooves before entering a variable axial orifice gap. The variable orifice moves in axial position to variably restrict balancing liquid and generate backpressure in the pressure chamber to balance the axial thrust caused by a plurality of impellers on the same single shaft. After passing through the variable orifice the bleed liquid can pass past a sealed lubricated roller bearing for heat exchange to cool said bearing with the cryogenic liquid along grooves in a bearing liner. Alternatively the liquid can also pass directly through an open unsealed bearing for cooling. | 01-01-2009 |
20090016907 | DYNAMIC BALANCER WITH SPEED-RELATED CONTROL MECHANISM - A dynamic balancer for a prime mover, such as an internal combustion engine, with at least one balance shaft driven by the crankshaft of the engine, the at least one balance shaft. The pressure generator creates an output signal of pressurized working fluid whose pressure is speed-related. In one embodiment, the speed related pressure signal is applied to a device outside the balancer via a suitable the invention, a working fluid pump is also driven by at least one of the balance shafts of the dynamic balancer and the speed-related pressure signal is applied to the working fluid pump to control its output. | 01-15-2009 |
20090035159 | Thrust and Intake Chamber for Pump - A pump end assembly has a centrifugal pump and a motor separated by a chamber. The chamber contains a thrust bearing as well as an intake for the pump. Fluid flowing into the intake flows through the thrust chamber and to the inlet of the pump. Some of the fluid also flows through the thrust bearing for lubricating the thrust bearing. | 02-05-2009 |
20090208352 | OIL PUMP OF AN ENGINE - A balance shaft function may be realized without employing a balance shaft, when an oil pump includes an inner rotor fixed to the rotation shaft and an outer rotor that rotates with the inner rotor if at least one rotor of the inner and outer rotors has a mass center formed apart from a rotation center. | 08-20-2009 |
20130343927 | ELECTRIC CENTRIFUGAL COMPRESSOR FOR VEHICLES - A compact electric centrifugal compressor particularly suitable for a heat ventilation air conditioning system for vehicles provides a motor portion ( | 12-26-2013 |
20140056736 | SCROLL COMPRESSION DEVICE - A scroll compression mechanism | 02-27-2014 |
20140072459 | AXIAL BEARING FOR AN ELECTRIC DRIVE - The invention relates to an axial bearing for retaining a rotor on a shaft of an electric drive. The axial bearing has a multi-sided outer contour. | 03-13-2014 |
20140140865 | TURBOCHARGER - A turbocharger includes: a thrust bearing fixed to a turbocharger main body; and a supply oil passage provided in the turbocharger main body to the thrust bearing. The thrust bearing includes: an insertion hole in which to insert the turbine shaft; pressure receiving portions displaced from one another in phase in a rotational direction of the turbine shaft, and each configured to form an oil film between the pressure receiving portion and the thrust collar to receive a thrust load by use of oil film pressure; and intervening portions each located between two of the pressure receiving portions adjacent in the rotational direction of the turbine shaft, and being further away from the thrust collar than the pressure receiving portions. The intervening portion vertically under the insertion hole at least partially has a surface further away from the thrust collar than the other intervening portions. | 05-22-2014 |
20140140866 | REFRIGERATION COMPRESSOR AND A METHOD FOR ASSEMBLING SUCH A REFRIGERATION COMPRESSOR - This refrigeration compressor includes an electric motor having a stator and a rotor provided with an axial through passage, a compression unit adapted for compressing refrigerant, and a drive shaft adapted for driving the compression unit, the drive shaft extending into the axial through passage of the rotor. The rotor is slide-fitted on the drive shaft. | 05-22-2014 |
20140140867 | VARIABLE SPEED SCROLL COMPRESSOR - This variable speed scroll compressor includes a closed casing including a low pressure volume and a high pressure volume, and an electric motor arranged in the low pressure volume and including a rotor and a stator, the rotor including permanent magnets, the stator including a stator core provided with a plurality of radially extending tooth portions and with a plurality of slots formed between the radially extending tooth portions, and stator windings each wound on the radially extending tooth portions. Each stator winding is wound around a respective tooth portion and includes winding portions extending respectively in the slots formed on each side of the respective tooth portion. | 05-22-2014 |
20140154111 | SEALED COMPRESSOR AND REFRIGERATION UNIT INCLUDING SEALED COMPRESSOR - A sealed compressor of the present invention comprises a sealed container ( | 06-05-2014 |
20140186199 | ELECTRIC BLOWER - Disclosed herein is an electric blower including: an impeller; a driving module including a rotor part coupled to the impeller in order to driving the impeller and a stator part, the rotator part including a magnet and the stator part including an armature formed of a core positioned so as to face the magnet and a coil; a motor housing having the driving module mounted thereon; and a control module mounted on the motor housing and controlling the driving module. | 07-03-2014 |
20150023815 | Compliant Abrasion Resistant Bearings for a Submersible Well Pump - An electrical submersible pump assembly includes a centrifugal pump having impellers and diffusers. A thrust runner is coupled to a motor shaft for rotation along with the impellers. The runner receives thrust from at least one of the impellers and transfers the thrust to a bushing non rotatably mounted in one of the diffusers. The bushing has a thrust transferring end adjacent a thrust receiving shoulder in the diffuser. The bushing is axially movable in the receptacle. An annular spring located between the thrust receiving shoulder in the receptacle and the thrust transferring end of the bushing urges the bushing away from the thrust receiving shoulder. | 01-22-2015 |