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WO/1996/011340A1 |
A multi-spool gas turbine engine of the type having an annular inter compressor duct connecting a low pressure compressor to a further compressor stage, and having improved bleed (161) means for bleeding off a variable amount of air from...
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WO/1996/008066A1 |
The proposal is for a circuit for operating an electric motor (11) containing a monitoring device (24) for detecting increased load on the electric motor (11). The monitoring device (24) compares a difference in rotation speed (ND) betwe...
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WO/1996/005438A1 |
The present invention discloses a bleed valve (2) for use in gas turbine engines. The valve (2) has a piston (4), one end (6) of which is positioned inside a housing (14) which is positioned on one side of the bypass fluid flow path (34)...
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WO/1995/026471A1 |
The invention concerns a system with at least one vacuum pump (2, 3), at least one measuring device (4, 5) and supply, control, operating and display equipment. In order to design a system of this kind so that it is more simple, less cos...
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WO/1995/025894A1 |
In order to control the driving voltage of a fan (L) in electric equipment, the temperature of an output diode (D) of an output circuit of the power supply (SV) of the electrical equipment is monitored and the driving voltage of the fan ...
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WO/1995/017607A1 |
Indications of non-recoverably compressor surge and blowout are provided by sensing compressor pressure, temperature and speed and comparing exhaust temperature with stored values and successive values depending upon instantaneous compre...
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WO/1995/016117A1 |
In a gas turbine with stator vanes, actual high speed rotor speed is compared with a value computed from engine pressure to produce an error signal. The error signal is integrated to command stator deflection.
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WO/1995/013215A1 |
A turbine engine rotor blade angle control device comprising an electric motor with a fixed stator (5) and a rotor (7), preferably an asynchronous or permanent magnet rotor, which is attached to the turbine engine shaft (2) and rigidly c...
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WO/1995/010692A1 |
The recirculating flow in the vaned passage (32) in the case (44) surrounding the tips of the fan blades (43) of a turbo fan engine (10) or ducted fan propulsor is modified or blocked off during certain engine or aircraft operating modes...
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WO/1995/010709A1 |
The present invention discloses a bleed valve for a gas turbine engine in which the bleed valve comprises two segments of the housing which forms the gas flow path through the compressor. One of the segments being moveable (10) away from...
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WO/1995/010078A1 |
The invention relates to a method for controlling the supply of a pressurized compressible medium to a network (3) debouching in at least one take-off point (2) by continuously measuring the amount of the compressible medium flowing to t...
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WO/1995/005541A1 |
A controller (26) for controlling the capacity of a centrifugal chiller compressor (12). The compressor (12) is driven by an electric motor (13) and has variable inlet guide vanes (29) that control the flow of refrigerant to the compress...
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WO/1995/004225A1 |
A process is disclosed for tapping a partial stream (2) from a stream (1) of compressed gas at a gap (6) provided with an arrangement of blade profiles (3) and delimited by at least two walls (4, 5), through which the stream (1) may pass...
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WO/1994/028313A1 |
The invention concerns a process for operating a friction vacuum pump at rotor speeds below the rated speed. In order to prevent damage to the pump caused by running at rotor speeds below the rated speed, it is proposed that the speed of...
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WO/1994/020759A1 |
To delay the onset of stall conditions at the tips of the blading of axial-flow, mixed-flow and axial-centrifugal compressors, at the tips of the annular arrays of blading anti-stall tip treatment means are provided at least at one said ...
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WO/1994/018045A1 |
A hovercraft, in particular water-borne hovercraft, has several lifting fans for generating an air cushion. Each fan (2) has a drive, a motor (5) and a pressure and/or position regulating circuit with corresponding sensors (7, 10) and re...
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WO/1994/003864A1 |
A process and a device for monitoring vibrational excitation of an axial compressor (10) by measuring of pressure fluctuation within at least one stage (12, 14) of said compressor (10) in the region of the compressor housing (24) by mean...
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WO/1994/003863A1 |
A process and a device for detecting fouling of an axial compressor (10) by measuring the pressure fluctuations within at least one of the stages (12, 14) of the compressor (10) in the region of the compressor housing (24) by means of at...
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WO/1994/003862A1 |
A process and a device for monitoring and controlling a compressor (10) by measuring pressure fluctuations within at least one stage of the compressor (10) in the region of the housing (24) of the compressor (10) by means of at least one...
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WO/1994/002742A1 |
A compressor assembly includes a housing, and a rotatable impeller within the housing which includes a hub and blades extending from the hub. A ring circumscribes the leading edge of the blades, and cooperates with a groove in the housin...
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WO/1993/023673A1 |
A centrifugal fan (10) has blades (24) the effective width of which are variable during fan operation through the actuation of modulation apparatus (32) which rotates with the fan wheel (14) and is driven thereby. The modulation apparatu...
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WO/1993/018356A1 |
A microprocessor-based air conditioning/refrigeration control system (76) adapted for use with a variable speed compressor (12) measures acceleration (N1) of the compressor and the temperature (T2) or pressure (P2) of the refrigerant exi...
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WO/1993/015322A1 |
In a control system (10) for a turbine engine having a variable geometry air compressor, a valve arrangement responsive to a first operational pressure differential created between a discharge fluid pressure produced by the air compresso...
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WO/1993/007392A1 |
A turbo-machine provided with impellers (1) to rotate in the casing (3), in which means (nozzle (4)) for forming an annular fluid layer flowing along the inner surface of the casing (3) is provided to detect the generation of instability...
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WO/1993/001414A1 |
The invention relates to a radial fan for, for example cars. It comprises radially arranged fan plates (15) having axial extension for axial suction and radial blowing of air. The invention is characterized in that one inside or between ...
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WO/1992/022791A1 |
A method and apparatus for determining the total flow rate of air flowing through a ventilation installation with a free suction fan (15) is described. The flow rate or a corresponding pressure is determined by measurement of the partial...
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WO/1992/022790A1 |
A method and apparatus for determining the total flow rate in a ventilation installation with a free suction fan (15) are described. The flow rate is determined by measurement of the local pressure at at least one measurement point in th...
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WO/1992/021866A1 |
The invention relates to a fan installation with at least one pole changing asynchronous motor (6, 7) to drive a fan (8, 9) in which there is a regulating system (14, 15) by means of which the speed of the asynchronous motor (6, 7) is co...
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WO/1992/003660A1 |
As a device for stabilising the performance characteristics, a radial compressor comprises a circulation chamber (31) which makes pressure equalisation between the impeller and the intake region possible. The intake region has an intake ...
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WO/1992/003661A1 |
The invention provides a method of controlling gas flow in an axial flow compressor (C) in which the flow at least at one chosen station in the direction of flow through the compressor the flow is sensed at a series of circumferentially ...
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WO/1992/000492A1 |
A device is provided for controlling the supply of air in a network of passages, e.g. in a mine, and includes a fan (10) having an electric motor (16) powered at a variable frequency. The device also includes a converter with an adjustab...
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WO/1991/018208A1 |
An air control valve (10) is positioned between an entry duct (4) and a fan (6) to control the velocity of air being fed to the fan (6). The valve (10) comprises a motorised flap (12) which is pivoted to restrict the passageway (15) betw...
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WO/1991/017491A1 |
The invention relates to an air flow rate adjusting method at the outlet of an air blowing device comprising a fan driven by a motor and connected to an air circuit, and means for varying a parameter (Vrms) of the supply voltage of the m...
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WO/1991/016544A1 |
In a method of stabilizing the pressure of a centrifugal fan comprising an impeller (1) mounted in a fan casing (4), said impeller being shielded by a shroud ring (2) on the inlet side said shroud ring extending to the mouth of an inlet ...
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WO/1991/012149A1 |
A ventilator fan for the air-conditioning system of the interior of a motor vehicle has an electric motor, in particular an electrically commutable motor, which drives a fan wheel (12) mounted on the inner end of an intake (13). A temper...
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WO/1991/009230A1 |
A variable speed turbo vacuum pump system (10) utilizes a motor driven compressor (12) to evacuate a gaseous medium from an enclosed space (22). The compressor (12) is a rotational type having at least one compressor wheel (40), the rota...
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WO/1991/007712A1 |
A compressor with surge control in accordance with the invention includes a rotor (12) receiving gas at an inlet and providing pressurized gas at an outlet; an outlet line (14) coupled to the outlet for providing pressurized gas; a flow ...
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WO/1990/014510A1 |
A narrow efficient operating island for a centrifugal compressor may be increased in a construction including a compressor section (18) mounting blades (22) surrounded by an annular shroud (38) by placing bleed passages (88) in the shrou...
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WO/1990/013745A1 |
The compressor controller (100) includes a timing circuit (106) for timing-out a detected fault in a compressor (111). Upon the fault existing for longer than a predetermined time limit, the controller (100) removes power from the compre...
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WO/1990/010148A1 |
A method and system for controlling the position of a variable pitch vane stage (34) in a gas turbine engine (10) uses a feedback loop comparing the current compressor pressure ratio to a reference compressor pressure ratio. The referenc...
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WO/1990/002878A2 |
A cryogenic vacuum pump includes, in an integral assembly, temperature sensors (58, 60) and heaters (69) associated with the first and second stages (52, 56) of the cryopumping array, a roughing valve and a purge valve. An electronic mod...
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WO/1990/002881A1 |
The expense of variable inlet guide vane structure for rotary compressors is avoided in a structure including a compressor housing (20) with an inlet (24) and a rotor (10) journaled within the housing (20) by disposing a housing (42) abo...
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WO/1990/002256A1 |
A guide vane assembly (22) for controllably varying fluid mass flow rates past compressor blades (14) in an auxiliary power unit. The auxiliary power unit comprises a rotary apparatus (10) for compressing fluid in a compressor housing (1...
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WO/1989/011589A1 |
Surge protection is achieved in a turbine engine intended to provide varying quantities of bleed air and having two compressor stages (48, 36) by providing the inlet (56) of the first stage (48) with variable inlet guide vanes (58), (60)...
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WO/1989/002581A1 |
A measuring device for measuring a pressure difference (DELTAp) and thereby the volume flow (qv) of a fan by carrying out the measuring of the pressure difference (DELTAp) in a two-chamber measuring part (2) located in the pressure apert...
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WO/1988/005870A1 |
In a ventilator part for an aerotechnical installation with an airtight wall (20) traversed by at least one ventilator (2), the suction side inlet and exhaust side outlet of which are located in separate chambers (21, 22) in the airtight...
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WO/1987/006981A2 |
A centrifugal supercharger has an impeller (211) having blades (216) so arranged that the flow path through the impeller increases in cross-sectional area radially outwards. A moveable shroud (220) can be lifted to increase the clearance...
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WO/1985/005046A1 |
A magnetic rotor (3) supported so that it can rotate in a receptacle or in a tube and which is in indirect contact with the medium to be stirred or pumped, is made to rotate by a rotating magnetic field of an electromagnetic drive device...
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JP2024053143A |
An object of the present invention is to provide a ceiling fan that can suppress vibrations caused by rotation of blades. [Solution] What is a support 2 that can be locked to a ceiling 90, a blade motor 3 provided on the support 2, a bla...
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JP2024051864A |
An object of the present invention is to control a fan system by taking into account changing fan characteristics. The present invention includes a control unit that controls a fan system including a fan and a motor that drives the fan, ...
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