Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
  • H02K7/1807—Rotary generators
  • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
  • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
  • F02C7/26—Starting; Ignition
  • F02C7/268—Starting drives for the rotor, acting directly on the rotor of the gas turbine to be started

Definitions

• the technical solution concerns a jet or turbine motor that contains a radial or diagonal compressor, which includes at least one rotary part placed in the fixed part of the jet or turbine motor in such a way that it can turn; a synchronous electromotor containing a mutually cooperating stator and motor is coupled with at least one turning part of the compressor.
• the objective of the technical solution is to remove or at least minimize the disadvantages of the state-of-the-art technology.
• the objective of the technical solution is achieved using a jet or turbine motor the principle of which is as follows: the rotor of the synchronous electromotor is fixed to a rotating part of the jet or turbine motor coupled with the compressor and the stator of the synchronous electromotor is, in alignment with the rotor of the synchronous motor, placed on the fixed part of the jet or turbine motor and coupled with an electric power supply and/or consumer.
• the rotor of the synchronous electromotor is fixed to a rotating part of the jet or turbine motor coupled with the compressor and the stator of the synchronous electromotor is, in alignment with the rotor of the synchronous motor, placed on the fixed part of the jet or turbine motor and coupled with an electric power supply and/or consumer.
• the rotor of the synchronous electromotor is fixed on the front part of the compressor wheel and the stator of the synchronous electromotor is fixed before the compressor wheel. This facilitates the construction of the jet or turbine motor particularly if the rotor of the synchronous electromotor is placed in a hollow in the front part of the compressor wheel.
• stator of the synchronous electromotor is conveniently placed in a covering body for aerodynamic covering of the middle part of the front end of the compressor wheel; the covering body is fixed in the middle part of the jet or turbine motor inlet casing by means of radial ribs; this solution is simple, cheap and reliable.
• At least one radial rib is hollow and serves as a duct for conductors for connecting the stator of the synchronous electromotor to an electric power supply and/or consumer; this enables further space of the jet or turbine motor construction to be saved.
• the stator of the synchronous electromotor is conveniently placed on a case overhung on the covering body; this is simple and cheap.
• the rotor of the synchronous electromotor contains a hollow permanent magnetic body with an even number of magnetic poles and the stator of the synchronous electromotor contains an electromagnetic body with multiphase winding situated in the cavity of the rotor of the synchronous electromotor; the multiphase winding is connected to an electric power supply and/or consumer.
• This solution is particularly suitable for the application of the above building-in of the synchronous electromotor into the front part of the compressor wheel.
• the rotor of the synchronous electromotor contains a permanent magnetic body with an even number of magnetic poles situated in the cavity of the stator of the synchronous electromotor containing a hollow electromagnetic body with multiphase winding connected to an electric power supply and/or consumer.
• This design is suitable for both: the above building-in of the synchronous electromotor into the front part of the compressor wheel, and in case the rotor of the synchronous electromotor is placed for example on the compressor shaft behind the compressor wheel or implemented into another rotating part of the jet or turbine motor coupled with the compressor, for example into the turbine on a common shaft with the compressor, etc.
• fig. 1 shows a longitudinal section of a sample design of a one-shaft jet motor with a synchronous electromotor constituting an electric starter integrated in the inlet part of the jet motor compressor
• fig. 1a shows a cross section across the hollow radial rib.
• the technical solution will be described on a design example of the jet motor which contains a compressor part 10 and turbine part Hi between them, in the way of compressor-compressed air, there is a combustion chamber 13; the fuel injecting nozzles 14 have outlets in this chamber.
• the combustion chamber 13 also has a suitable ignition system which is not shown in the figure for the initial ignition of the mix of compressed air and fuel.
• the compressor part 0 includes a rotor wheel 5 of the radial compressor
• the turbine part H includes a turbine rotor wheel 16.
• the wheel 15 of the radial compressor and the wheel 16 of the turbine are pivoted on the common shaft 17 which is pivoted by means of bearings 19, 19' in the stator part of the jet motor or in stator casings 18.
• the jet motor is, in alignment with the rotation axis of rotating parts of the radial compressor, equipped with the rotor 200 of the synchronous electromotor 2.
• the rotor 200 of the synchronous electromotor 2 is fixed on one of the suitable rotating parts of the jet motor coupled with the compressor; it is placed for example on the compressor wheel or on the common shaft 17 of the compressor or the turbine or on another rotating part of the jet motor coupled with the compressor.
• the rotor 200 of the synchronous electromotor 2 rotates together with rotating parts of the compressor; for its pivoting necessary for the operation of the synchronous electromotor 2 the pivoting of a respective part of the jet motor is used, for example the pivoting of the compressor or of the common shaft 17, etc.
• the rotor 200 of the synchronous electromotor 2 is fixed on the front part of the wheel 15 of the radial compressor or in the hollow in the front part of the wheel 15 of the radial compressor.
• the rotor 200 of the synchronous electromotor 2 fixed in the hollow in the front part of the wheel 15 of the radial compressor contains a magnetic ring 20 placed on the inner wall of the hollow in the front part of the wheel 15 of the radial compressor; on the magnetic ring 20, two permanent magnets 2 ⁇ are placed in the direction towards the free space of the hollow.
• the rotor 200 of the synchronous electromotor 2 is fixed on the common shaft 17 with the turbine or is placed on the turbine, etc.
• stator 201 of the synchronous electromotor 2 On the stator part of the jet motor in the respective part of the jet motor the stator 201 of the synchronous electromotor 2 is fixed; the axes of both pairs, stator 201 & rotor 200 of the synchronous electromotor, are aligned and interlock in a known way to be able to perform as the synchronous electromotor 2.
• stator 20_1 of the synchronous electromotor 2 is fixed before the front part of the wheel 15 of the radial compressor, for example in the covering body 240 for the aerodynamic covering of the middle part of the front end of the wheel 15 of the radial compressor placed by means of the radial ribs 27 in the middle of the inlet casing 24 of the jet motor before the radial compressor;
• the stator contains the multiphase winding 23 using which the stator 201 is situated in the cavity between permanent magnets 21 of the rotor 200 of the synchronous electromotor 2 placed in the hollow in the front part of the wheel 15 of the radial compressor.
• the multiphase winding 23 is coupled with the electric power supply unit for example using conductors 25 that run through one hollow radial rib 27 outside the actual body of the jet motor.
• the multiphase winding 23 is placed on the case 29 that is overhung in the covering body 240 using the screw 30.
• stator 201 and the rotor 200 of the synchronous electromotor 2 are ensured in a suitable way.
• stator 201 cooling is ensured by heat transfer from the multiphase winding 23 via the case 29 to the radial ribs 27 and further to the inlet casing 24 of the jet motor in combination with artificial ventilation of the flowing air sucked in by the compressor and flowing around the covering body 240 and also through openings and gaps in the covering body 240 etc.
• the cooling of the whole synchronous electromotor 2 is also supported by the radial duct 3_1 from the hollow in the front part of the wheel 15 of the radial compressor in the direction from the stator 201 of the synchronous electromotor 2 behind the rotor 200 of the synchronous electromotor 2.
• stator 201 and the rotor 200 of the synchronous electromotor 2 can be constructed in a different, suitable way; they can be also integrated into the structure of rotating and fixed parts of the jet motor in a different, suitable way.
• the synchronous electromotor 2 can serve as a drive; after the start-up of the jet motor when the compressor keeps rotating as a result of the expansion of the burnt fuel with the air blown on the turbine blades the synchronous electromotor 2 can operate as a generator of electric current usable either directly in the jet motor or also in external equipment, outside jet motor, etc.
• the technical solution is usable in jet motors, turbine motors, etc.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Power Engineering (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

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Applications Claiming Priority (2)

Publications (1)

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Cited By (27)

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Citations (6)

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• 2002
  • 2002-09-06 CZ CZ200213449U patent/CZ12724U1/cs not_active IP Right Cessation
• 2003
  • 2003-09-03 CN CNB038212609A patent/CN100447388C/zh not_active Expired - Lifetime
  • 2003-09-03 AU AU2003266099A patent/AU2003266099A1/en not_active Abandoned
  • 2003-09-03 WO PCT/CZ2003/000050 patent/WO2004022948A1/en not_active Application Discontinuation

Patent Citations (6)

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