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| Number | Title | Issue Date |
| 7556473 | Control unit for compressor The present invention includes an inflow quantity regulating means 5 for regulating the inflow quantity of a fuel gas to a compressor 1; a recycle valve 7 for returning the fuel gas discharged from the compressor 1 to the inlet side of th... | 07/07/2009 |
| 7392713 | Monitoring system for turbomachinery A sensing system for monitoring a property of an electrically conductive moving element of turbomachinery. The sensing system includes a sensing system housing. A magnetic core is contained within the sensing system housing. A coil is positioned about at least a por... | 07/01/2008 |
| 7353662 | Medium voltage starter for a chiller unit A single medium voltage starter box is mounted on a chiller unit with the other components of the chiller system. The starter box can be positioned on the chiller system unit to permit the starter box to be close coupled to the motor, and specifically to the main mo... | 04/08/2008 |
| 7341426 | Gas turbine engine blade tip clearance apparatus and method A gas turbine engine is provided that includes one or more rotor assemblies, one or more shroud segments, and an actuator. The rotor assemblies are rotatable around an axially extending rotational axis, and each rotor assembly has a plurality of blades. Each blade h... | 03/11/2008 |
| 7326027 | Devices and methods of operation thereof for providing stable flow for centrifugal compressors Centrifugal compressor flow stabilizing devices and methods of operation thereof are disclosed that act upon the flow field discharging from the impeller of a centrifugal compressor and modify the flow field ahead of the diffuser vanes such that flow conditions cont... | 02/05/2008 |
| 7293954 | Centrifugal compressor for turbo chiller, turbo chiller, and control method therefor A turbo chiller that can accurately determine the existence of surging occurring in a centrifugal compressor is provided. In a centrifugal compressor of a turbo chiller, which includes an impeller for compressing refrigerant, a resistance temperature sensor for dete... | 11/13/2007 |
| 7264441 | Hybrid cycle high pressure compressor and turbine engine including such a compressor The invention relates to a hybrid cycle HP compressor (104) for a turbine engine, comprising in particular a first rotor wheel (16), a first rectifier (118) and a second rotor wheel (20), as well as a separation slot (22) fitted be... | 09/04/2007 |
| 7254948 | Boost wastegate device for EGR assist An apparatus and method for controlling exhaust gas recirculation flow. The apparatus and method uses a pressure-bleeding device, such as a wastegate valve, to change the pressure in an internal combustion engine in order to alter the flow rate of the exhaust gas th... | 08/14/2007 |
| 7216473 | Turbojet engine lubrication system A lubrication system for an expendable gas turbine engine (20) having a rotatable shaft (26) is provided. Bearings (28) journal the shaft (26) for rotation about an axis. The system includes a vessel (46) for containing lubricating... | 05/15/2007 |
| 7210895 | Turbo compressor and method of operating the turbo compressor A turbo-compressor being driven by an electric motor has an inlet guide vane and a blow-off valve. The surge limit line of the compressor is amended depending upon seasonal changes of temperature and pressure of a working gas to be sucked into the compressor. Upon t... | 05/01/2007 |
| 7142974 | Engine measuring equipment Engine measuring equipment for obtaining engine torque regarded as necessary for engine performance assessments for a short time period during a period when engine revolution is under a transient state is disclosed. The engine measuring equipment includes a central ... | 11/28/2006 |
| 7137407 | Trip manifold A trip manifold assembly is disclosed which includes a manifold body connected to a header shaft. The header shaft passes through a plurality of rotary valves. Each rotary valve is connected to a pressure transmitter. The header shaft comprises two passages includin... | 11/21/2006 |
| 7112037 | Centrifugal pump performance degradation detection A system for determining whether a centrifugal pump assembly is degraded as operating outside of acceptable operating limits and includes a processor adapted by software to perform the steps of automatically characterizing the pump characteristics at a predetermined... | 09/26/2006 |
| 7108477 | Warning before pump limit or in case of blade failure on a turbomachine In a method for determination of a surge limit warning (W) for a turbocompressor, or a warning of blade damage, at least two measurement signals (p1, p2; {tilde over (p)}1, {tilde over (p)}2), are determined, a periodicity... | 09/19/2006 |
| 7094019 | System and method of surge limit control for turbo compressors A system and method of surge limit control for turbo compressors including a turbo compressor having an inlet and an outlet, an anti-surge valve, a variable speed drive to operate the compressor, a rotational speed transmitter, an inlet temperature transmitter, an i... | 08/22/2006 |
| 7089738 | System for controlling turbocharger compressor surge A system for controlling turbocharger compressor surge includes a turbocharger compressor fluidly coupled to an engine intake manifold, an exhaust gas recirculation (EGR) valve disposed in-line with an EGR conduit fluidly coupled between the engine intake and exhaus... | 08/15/2006 |
| 7083378 | Wind generator The present invention relates to a wind generator. The wind generator comprises a body installed freely rotatably at a tower, blades installed at a leading end of the body, a gearbox for receiving rotational forces from the blades, and a generator connected to the g... | 08/01/2006 |
| 7069733 | Utilization of bogdown of single-shaft gas turbines to minimize relief flows in baseload LNG plants Gas compression system comprising a driver; a refrigerant compressor driven by the driver and having an inlet and an outlet; a relief pressure safety valve having an inlet in flow communication with the outlet of the compressor, an outlet, and a set point; and a rec... | 07/04/2006 |
| 7059820 | Noise control Methods, devices, and/or systems for controlling vibration and/or acoustic noise. An exemplary method senses noise and/or, for example, rotational speed of a rotating shaft, determines control parameters and actuates one or more actuators. An exemplary device includ... | 06/13/2006 |
| 7037070 | Variable pitch device for two blade stages fixed onto a turbojet The pitch control mechanism (controlling the angular position) for stator blades in a turbojet may be adjusted separately for two adjacent stages of blades controlled by a common actuator 10. To achieve this, the synchronization bar 9 located between t... | 05/02/2006 |
| 7025558 | Process for the reliable operation of turbocompressors with surge limit control and surge limit control valve A process for the reliable operation of turbocompressors with a surge limit control and a surge limit control valve is described, in which the compressor delivers gases with different compositions and the composition of the gas (molecular weight) affects the perform... | 04/11/2006 |
| 7008184 | Control for cooling fan A control for changing direction of air flow through a cooling core in response to an external signal and a purge signal includes a logic circuit and a relay assembly. The logic circuit generates a fan control signal based on the external signal, which causes the fa... | 03/07/2006 |
| 6981838 | Method and apparatus for detecting the occurrence of surge in a centrifugal compressor A method and apparatus for detecting the occurrence of surge or incipient surge in a centrifugal compressor is supplied. The centrifugal compressor has an inlet passage, an inlet passage wall and an impeller. When flowing a fluid through the centrifugal compressor t... | 01/03/2006 |
| 6939100 | Method and apparatus for controlling steam turbine inlet flow to limit shell and rotor thermal stress In a method of controlling steam flow through a steam turbine having a turbine rotor, a maximum heat transfer rate is determined based on thermal stress calculations in the turbine rotor. A maximum steam flow rate can be calculated based on the maximum heat transfer... | 09/06/2005 |
| 6926494 | Hydraulic turbine with increased power capacities A hydraulic turbine with increased power capacities for new or existing hydroelectric installations. The turbine has a larger axial runner wheel and a reshaped runner ring peripherally extending around the runner wheel. A draft tube with a larger elbow section exten... | 08/09/2005 |
| 6918307 | Device, system and method for on-line monitoring of flow quantities Measures of a torque and rotational speed of a pump or fan are obtained, from which a mechanical input power can be calculated. By further using predetermined relations between mechanical input power and flow rate through the pump or fan, a measure of the flow rate ... | 07/19/2005 |
| 6918739 | Seal support A turbine engine has a rotor shaft rotatably carried within a non-rotating support structure. A seal is carried by the support structure circumscribing the shaft and having a flexible sealing element for sealing with the shaft. A chamber is located between the seal ... | 07/19/2005 |
| 6910853 | Structures for attaching or sealing a space between components having different coefficients or rates of thermal expansion A structure for attaching together or sealing a space between a first component and a second component that have different rates or amounts of dimensional change upon being exposed to temperatures other than ambient temperature. The structure comprises a first attac... | 06/28/2005 |
| 6860712 | Control strategy for gas turbine engine A control strategy for a gas turbine engine which exchanges future lifetime of the engine for present thrust. Gas turbine engines, such as those used in aircraft, sometimes incur damage, as when they ingest birds, or are struck with ballistic objects fired by an ene... | 03/01/2005 |
| 6837681 | Wind power plant with a particle sensor Wind power installations using more modern technology have long been known. Such wind power installations have rotors comprising at least one or more rotor blades. The rotors and accordingly the rotor blades carried thereby of wind power installations are subjected ... | 01/04/2005 |
| 6776584 | Method for determining a centrifugal pump operating state without using traditional measurement sensors A method for determining whether a centrifugal pump is operating within its normal flow operating range includes the steps: of determining a motor torque/TDH relationship over a range of speeds for a minimum flow rate in order to obtain a minimum flow operating rang... | 08/17/2004 |
| 6767178 | Response time of a steam turbine speed-control system Steam turbine speed-control systems often incorporate pilot valves for controlling the position of hydraulic actuators for steam valves. Operational efficiency of these pilot valves can suffer from imperfections due to manufacturing defects, wear, contaminated oil, ... | 07/27/2004 |
| 6755609 | Radial pump A radial-flow pump (1), and especially a coolant pump for an internal combustion engine, comprising an impeller (2) provided with vanes (5) and a directing device (4) including at least one temperature- and/or speed-sensitive element for ... | 06/29/2004 |
| 6648606 | Centrifugal pump performance degradation detection A method for determining whether a centrifugal pump is degraded as operating outside of acceptable operating limits and includes the steps of determining a motor torque/TDH relationship over a range of speeds for minimum and maximum flow rates and at leas... | 11/18/2003 |
| 6558113 | Process and device for regulating a turbocompressor to prevent surge To prevent surge of a turbocompressor (K), a anti-surge valve (27) provided at the compressor outlet is controlled by a controller (R). The input signal for the controller (R) is generated as a function of the instantaneous flow and the end pressure of th... | 05/06/2003 |
| 6551068 | Process for protecting a turbocompressor from operating in the unstable working range To protect a turbocompressor (3) with a downstream process from operation in the unstable working range, a machine controller is used, which optionally contains--besides a surge limit controller (15)--an intake pressure controller (11), an end pressure co... | 04/22/2003 |
| 6533536 | Hydro-turbine runner A turbine installation comprising a turbine in combination with an electrical closed-loop control system. The turbine is disposed in a flow of water for producing electrical energy. The turbine includes a hollow hub and a plurality of runner blades pivota... | 03/18/2003 |
| 6506010 | Method and apparatus for compressor control and operation in industrial gas turbines using stall precursors An apparatus for monitoring the health of a compressor including at least one sensor operatively coupled to measure the dynamic pressure of gases flowing through the compressor, a processing system coupled to at least one sensor, the processor system reco... | 01/14/2003 |
| 6503048 | Method and apparatus for estimating flow in compressors with sidestreams Accurate and effective antisurge control for turbocompressor stages is augmented by measuring the flow rate of fluid entering or leaving the stage of compression. On the other hand, turbocompressors with sidestreams, such as ethylene, propylene, and propa... | 01/07/2003 |
| 6494672 | Method and apparatus for antisurge control of turbocompressors having complex and changing surge limit lines Compensating for the complex changing shape and location of a turbocompressor's surge limit line can be difficult and imprecise when using antisurge controllers that do not incorporate sufficient capability. Based upon various operating conditions, surge ... | 12/17/2002 |
