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WO/2009/085469A1 |
A method of operating a compressor having a row of blades for preventing a compressor stall is disclosed, the method comprising the steps of mounting a plasma generator in a casing or a shroud radially outwardly and apart from the blade ...
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WO/2009/086349A1 |
A compression system is disclosed, the compression system comprising a rotor having a plurality of blades arranged around a centerline axis, each blade having a blade airfoil and a blade tip, and at least one plasma actuator located on a...
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WO/2009/083292A1 |
The invention relates to a swirl-generating apparatus (10), in particular for a turbocharger (44), for generating pre-swirl, wherein the swirl-generating apparatus has: a housing (12) comprising a first and second housing element (14, 16...
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WO/2009/086475A1 |
A compression system is disclosed, the compression system comprising a rotor having a circumferential row of blades each blade having a blade tip, a static component located radially outwardly and apart from the blade tips, a detection s...
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WO/2009/086481A1 |
An instability mitigation system 700 is disclosed, comprising a stator stage 31 located axially proximate to a rotor 12a, the stator stage 31 having a row of a plurality of stator vanes 31a arranged around a centerline axis 8, and a miti...
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WO/2009/086358A1 |
A system for detecting onset of a stall in a rotor is disclosed, the system comprising a sensor located on a static component spaced radially outwardly and apart from tips of a row of blades arranged circumferentially on the rotor wherei...
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WO/2009/086480A1 |
A compression system (18) is disclosed, the compression system comprising a stator stage (31) having a row of a plurality of stator vanes (31) a arranged around a centerline axis (8). each stator vane (31) having a vane airfoil (35) and ...
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WO/2009/086387A1 |
An instability mitigation system is disclosed, comprising a detection system for detecting an onset of an instability in a rotor during the operation of the rotor, a mitigation system that facilitates the improvement of the stability of ...
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WO/2009/072160A2 |
A gas compression plant (1) including at least a gas compressor (2) and at least a cylinder casing (3) is disclosed. The compressor (2) completely compresses the gas via at least two consecutive compression stages. The cylinder casing (3...
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WO/2009/065539A1 |
Disclosed is a fan arrangement (20) comprising a fan (24) that is driven by an electric motor (22), a device for detecting the electric power (Pist) consumed by the electric motor (22) during operation, an input device (28) for entering ...
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WO/2009/062793A1 |
Disclosed is a guide vane (2) for a compressor (1) with an airfoil (7), and a base plate (8) for mounting the guide vane (2) to a compressor casing, wherein the base plate (8) includes an air duct (9) sized and configured to guide compre...
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WO/2009/062583A1 |
The invention relates to a two-stage air compressor, comprising a first compression stage with a low pressure cylinder; a second compression stage with a high pressure cylinder; a connecting element for producing a channel connection fro...
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WO/2009/056606A1 |
The invention relates to a turbomolecular pump (10) having a pump housing (14) and multiple separate stator blade ring discs (16), which form a ring disc packet (18) together. A cylindrical friction bush (20) is disposed directly between...
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WO/2009/058975A1 |
A system for controlling a centrifugal gas compressor (108) in an HVAC, refrigeration or liquid chiller system (100) in which flow of gas through the compressor is automatically controlled to maintain desired parameters within predetermi...
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WO/2009/056394A1 |
The invention relates to a turbocharger having a compressor housing (12), wherein the compressor housing is connected to a valve device, and wherein the compressor housing is designed such that, when a predetermined air mass flow is fed ...
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WO/2009/056987A2 |
A system and a method for adding and subtracting stages of compression to a compressor as and when the compressor requires them. If the compressor needs only a low pressure ratio, then the system and method allow the compressor to operat...
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WO/2009/057598A1 |
Provided is a control method for a dual counter-rotating type axial blower, which can improve both a cooling efficiency and an operating efficiency. A first motor (11) and a second motor (19) are started according to a predetermined star...
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WO/2009/055878A2 |
A method for avoiding an unstable working condition in centrifugal compressors (1), which unstable working condition is better known under the term "surge" or "surging" condition, characterised in that it consists in measuring and/or cal...
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WO/2009/050175A1 |
A method of controlling one or more refrigerant compressors (12) for one or more gaseous streams (10) at a normal operating temperature. At least one refrigerant compressor (12) has a vapour recirculation line (30). A compressor feed str...
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WO/2009/050178A2 |
A hydrocarbon stream (5) is heat exchanged against one or more at' least, partially condensed refrigerant streams (20e) to provide a cooled hydrocarbon stream (6) and an at least partly evaporated refrigerant stream (8) at a pressure P1....
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WO/2009/046504A1 |
Improved turbo compressor which is formed of a housing (2) with a volute casing (3) in which a rotor (4) has been provided such that it can turn by means of a shaft (5), and an inlet piece (6) forming an axial guide for the gas which is ...
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WO/2009/040513A2 |
A compressor typically for use in a turbocharger comprises a downstream radial compressor impeller wheel (11), an upstream axial compressor impeller wheel (10) and an intermediate stator (12). The compressor housing (13) has an inlet (19...
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WO/2009/041851A1 |
The invention relates to aircraft and compressor engineering. The inventive method for monitoring the operating modes of a compressor consists in measuring the pressure pulsation parameters and the rotor wheel rotation frequency, forming...
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WO/2009/037255A1 |
The invention relates to a vacuum pump (10) having a pump rotor (16), and active magnetic bearing (20,21), a safety bearing (22,23) associated with the magnetic bearing (20,21), an electric drive motor (18) having a motor stator having a...
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WO/2009/027623A1 |
The invention relates to improvements in compressors and, in particular, to an improvement in a method of controlling variable speed dynamic compressors to avoid 'motor overload as a result of choking.1 The invention therefore comprises ...
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WO/2009/028009A1 |
A control technique for keeping a revolution with the same or specific relationship by giving a feedback of the revolution to each fan in order to reduce “beating sound” arising due to rotational errors of each fan in using a plurali...
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WO/2009/024740A1 |
The invention relates to improvements in compressors and, in particular, to improvements in a method of controlling centrifugal compressors to maximise their efficacy. The compressor has an impeller mounted on a shaft supported by an act...
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WO/2009/020415A1 |
In a method and a system for preventing a reverse gas mass flow through a compressor of a turbo charged combustion engine, the maximum allowed pressure drop over the compressor for each gas mass flow is mapped in a pressure difference ga...
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WO/2009/020418A1 |
In a method and a system for controlling a combustion engine powering a motor vehicle having a turbo charger and an EGR system the control system is adapted to detecting a strong negative fuel rate exceeding a pre-determined threshold va...
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WO/2009/015635A2 |
A closed-loop control system for a gas turbine, in particular an aircraft engine, has devices for blade-tip blowing-in (ASC) in order to improve the compressor stability, which devices are activated when required. The closed-loop control...
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WO/2009/018532A1 |
A plasma generator for delaying the onset of rotation stall by tip gap flow control in, for example, an axial flow compressor is disclosed. The tip gap flow control system includes a housing surrounding a rotor of blades and having an in...
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WO/2009/016145A1 |
The invention relates to a method for detecting a rotating stall fault in a compressor (12) which is driven by means of a three-phase current motor (8) fed by an inverter. According to the invention, an instantaneous estimated value (^m ...
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WO/2009/011241A1 |
A gas compression device for compressing gas by multiple compression means arranged in series relative to the direction of flow of the gas. The flow rate of the gas sucked into a gas compression section is controlled according to the amo...
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WO/2009/007393A1 |
An impeller arrangement is provided which comprises an impeller casing (9), an impeller (1), a shaft (3) fixed to the impeller (1) and a shaft bearing (5). It further comprises a condition detection system with one or more sensors (27, 2...
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WO/2009/003653A1 |
The invention relates to an exhaust gas turbocharger (1) comprising a radial turbine (2) which has a turbine wheel (4) that is arranged in a turbine housing (3). Said exhaust gas turbocharger (1) further comprises a radial compressor (5)...
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WO/2009/000481A1 |
A fan (20) to which the invention relates has: a motor with a stator and with a rotor (60) with at least one fan vane, at least one air inlet with an air inlet opening (102) for the inlet of air, at least one air outlet with an air outle...
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WO/2008/155402A1 |
The position control of a prerotation guide device for producing a prerotation in the suction area of a compressor, comprises an actuator (50) for displacing guide elements (20) of said prerotation guide device, and a sensor (60) that de...
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WO/2008/151905A1 |
The invention relates to a magnetized nut for fastening a compressor wheel of an exhaust turbocharger to the turbo shaft, wherein the nut has a base body made of a non-magnetic material forming a hollow space for accommodating a magnetic...
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WO/2008/144250A2 |
An automatic deactivation mechanism is configured for an air bladder pump having a casing and a motor located therein to pump air into an air bladder from the atmosphere and through an air valve connected through the casing. The automati...
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WO/2008/143231A1 |
A fan control system for controlling fans, which, when a fan in operation becomes overloaded, eliminates the overload. The fan control system has a first fan (21), a second fan (22) adjacent to the first fan (21), a first motor (31) for ...
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WO/2008/138075A1 |
Method for controlling a turbocompressor, whereby a compressed air line (5) is connected to this turbocompressor (1) with a non-return valve (6) provided therein, characterised in that, when one or several process parameters exceed a pre...
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WO/2008/133240A1 |
Provided is a fan control system which suppresses increase of start-up load, which is due to a fan previously started rotation and applied on fans other than the fan previously started rotation, at the time of starting a plurality of fan...
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WO/2008/126253A1 |
A fan noise reduction device in a fan provided in a casing and a method of reducing fan noise are characterized in that a noise characteristic adjustment plate installed in a route for a fan suction air or a discharge air wind is made to...
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WO/2008/118723A1 |
A system and method is provided for detecting and controlling rotating stall in the diffuser region of a compressor. A pressure transducer is placed in the gas flow path downstream of the impeller, preferably in the compressor discharge ...
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WO/2008/110177A1 |
The present invention relates to a method and system for controlling performance of a ventilator, in particular, the invention relates to the integration of a control unit, a computer and a measuring unit in a ventilation system, capable...
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WO/2008/101752A1 |
A method for determining the fatigue of a pump rotor of a gas turbopump has the following method steps: continuous detection of the rotor rotational speed (n) of the pump rotor, detection of the local rotational-speed maxima and minima o...
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WO/2008/097743A1 |
Airflow rates within a ventilation system are controlled using motor speed or torque and motor electric current or pressure. Fan speed or torque may be varied to compensate for differing restriction in ductwork, and may provide a constan...
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WO/2008/095565A1 |
The invention relates to a fan arrangement and a method for operation thereof, comprising a control module (1) for controlling two circuit breakers, two circuit breakers (3, 4), two electric motors (5, 6) which have their operating volta...
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WO/2008/094501A1 |
In a rotodynamic pump, a seal chamber conditioning valve mechanism is positioned at least partially within the seal chamber of the pump to selectively and intermittently deliver fluid to or discharge contents from the seal chamber to mod...
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WO/2008/087731A1 |
A refrigeration cycle system for cooling of a medium to be cooled, comprising refrigerant compressor (3) for compressing of the refrigerant after cooling of a medium to be cooled; condenser (6) for condensing of the refrigerant having be...
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