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Title:
JET MOTOR OR TURBINE MOTOR
Document Type and Number:
WIPO Patent Application WO/2004/022948
Kind Code:
A1
Abstract:
A jet or turbine motor that includes a radial or diagonal compressor containing at least one rotating part pivoted in the fixed part of the jet or turbine motor when a synchronous electromotor containing a mutually cooperating stator and rotor is coupled with at least one rotating part of the compressor where the rotor (200) of the synchronous electromotor (2) is fixed on the rotating part of the jet or turbine motor coupled with the compressor while the stator (201) of the synchronous electromotor (2) is, in alignment with the rotor (200) of the synchronous electromotor (2), placed on a fixed part of the jet or turbine motor and coupled with an electric power supply and/or consumer.

Inventors:
KATOLICK ZDENEK (CZ)
HAVRANEK CESTMIR (CZ)
Application Number:
PCT/CZ2003/000050
Publication Date:
March 18, 2004
Filing Date:
September 03, 2003
Export Citation:
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Assignee:
PRVNI BRNENSKA STROJIRNA VELKA (CZ)
KATOLICK ZDENEK (CZ)
HAVRANEK CESTMIR (CZ)
International Classes:
F01D15/10; F01D25/36; F02C6/00; F02C7/268; H02K7/18; (IPC1-7): F02C7/268; H02K7/14; H02K7/18; H02K21/14; H02K21/22
Foreign References:
US3187188A1965-06-01
US3071691A1963-01-01
US3264482A1966-08-02
GB1147730A1969-04-02
US3859785A1975-01-14
US5237817A1993-08-24
Attorney, Agent or Firm:
Malusek, Jiri (Brno, CZ)
Download PDF:
Claims:
PATENT CLAIMS
1. A jet or turbine motor that includes a radial or diagonal compressor containing at least one rotating part pivoted in the fixed part of the jet or turbine motor when a synchronous electromotor containing a mutually cooperating stator and rotor is coupled with at least one rotating part of the compressor characterized by that the rotor (200) of the synchronous electromotor (2) is fixed on the rotating part of the jet or turbine motor coupled with the compressor while the stator (201) of the synchronous electromotor (2) is, in alignment with the rotor (200) of the synchronous electromotor (2), placed on a fixed part of the jet or turbine motor and coupled with an electric power supply and/or consumer.
2. The jet or turbine motor according to claim 1 characterized by that the rotor (200) of the synchronous electromotor (2) is fixed on the rotating part of the compressor.
3. The jet or turbine motor according to claim 2 characterized by that the rotor (200) of the synchronous electromotor (2) is fixed on the front part of the compressor wheel while the stator (201) of the synchronous electromotor (2) is fixed before the compressor wheel.
4. The jet or turbine motor according to claim 3 characterized by that the rotor (200) of the synchronous electromotor (2) is placed in the hollow in the front part of the compressor wheel.
5. The jet or turbine motor according to claim 3 or claim 4 characterized by that the stator (201) of synchronous electromotor (2) is placed in the covering body (240) for aerodynamic covering of the middle part of the front end of the compressor wheel, when the covering body (240) is fixed in the middle part of the jet or turbine motor inlet casing (24) by means of radial ribs (27).
6. The jet or turbine motor according to claim 5 characterized by that at least one radial rib (27) is hollow and serves as a duct for conductors (25) for connecting the stator (201) of the synchronous electromotor (2) to an electric power supply and/or consumer.
7. The jet or turbine motor according to claim 5 or claim 6 characterized by that the stator (201) of synchronous electromotor (2) is placed on a case (29) overhung on the covering body (240).
8. The jet or turbine motor according to any of claims 1 through 7 characterized by that the rotor (200) of synchronous electromotor (2) contains a hollow permanent magnetic body with an even number of magnetic poles, while the stator (201) of the synchronous electromotor (2) contains an electromagnetic body with multiphase winding (23) situated in the cavity of the rotor (200) of synchronous electromotor (2) and the multiphase winding (23) is connected to an electric power supply and/or consumer.
9. The jet or turbine motor according to any of claims 1 through 7 characterized by that the rotor (200) of synchronous electromotor (2) contains a permanent magnetic body with an even number of magnetic poles situated in the cavity of the stator (201) of the synchronous electromotor (2) containing a hollow electromagnetic body with multiphase winding (23) connected to an electric power supply and/or consumer.
10. The jet or turbine motor according to any of claims 1 through 9 characterized by that the stator (201) and/or rotor (200) of the synchronous electromotor (2) is allocated a system of cooling ducts.
Description:
Jet motor or turbine motor Technical field 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.

State of the art As to jet or turbine motors that contain radial or diagonal compressors it is necessary, after starting the jet or turbine motor, to ensure an initial start-up (rotation) of the rotor to reach the required speed. A considerable number of technical solutions are known enabling the initial start-up of rotors of the turbine or jet motors.

There are known solutions that utilize the effects of compressed air driven through a nozzle to the compressor blades. There are also some solutions that use the effects of a pyrope cartridge on the blades of a turbine the rotating motion of which is transferred to the compressor wheel by means of a common shaft with the compressor. The use of a separate electromotor of a commutator type constituting an electrical starter is also known; it is mechanically coupled with the jet or turbine motor shaft for example by means of a gearbox, starting clutch or freewheel clutch. If the electromotor is permanently connected using the above means with the shaft of the turbine or jet motor, it can be also used as a supply of electrical power-if the construction is suitable for this purpose. There are also some constructions that contain a separate electromotor and a separate electrical generator.

The hitherto constructions have some disadvantages: great weight and demanding space requirements. Another disadvantage is the relatively complex construction of known solutions and related demanding manufacturing conditions and corresponding price of the equipment.

The objective of the technical solution is to remove or at least minimize the disadvantages of the state-of-the-art technology.

Principle of the technical solution 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. By this setup it is possible to lower spatial requirements of the'synchronous electromotor-jet or turbine motor'set; for placing the rotating parts of the synchronous electromotor the placement of current rotating parts of the jet or turbine motor is also utilized which makes the construction of the jet or turbine motor simpler and cheaper. It is also convenient that for connecting the rotor of the synchronous electromotor with the compressor no other additional equipment must be used, for example a coupling or a gearbox, as the current connections of the compressor with a relevant rotating part of the jet or turbine motor are utilized.

With regard to the simplicity of the construction of the jet or turbine motor it is convenient if the rotor of the synchronous electromotor is fixed on a rotating part of the compressor.

According to one convenient design 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.

At the same time, the 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.

According to one convenient design 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.

According to another convenient design 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.

For cooling a part of the synchronous electromotor it is convenient if the stator and/or rotor of the synchronous electromotor are allocated a system of cooling ducts.

An overall advantage of this setup of the jet or turbine motor lies in achieving higher electrical effectiveness and maintenance-free operation. Another advantage of this solution of the jet or turbine motor is a high torque of the synchronous electromotor and an option for the synchronous electromotor with permanent magnets to operate as an electric power generator also at high speeds without the necessity of additional banding that would result in an increased magnetic gap between the stator and rotor of the synchronous electromotor; a smaller magnetic gap enables lower-thickness magnets to be used while achieving the same output.

Overview of figures in the drawing The scheme of the technical solution is shown in the figures; 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.

Example of technical solution design The technical solution will be described on a design example of the jet motor which contains a compressor part 10 and turbine part A 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. <BR> <BR> <P>The compressor part 10 includes a rotor wheel 15 of the radial compressor, and the<BR> turbine part 11 includes a turbine rotor wheel 16. In the example shown the wheel 15<BR> of the radial compressor and the wheel 16 of the turbine are pivoted on the common<BR> 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.

In the example of the design shown 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. In the example of the design shown the rotor 200 of the synchronous electromotor 2 fixed in the hollow in the front <BR> <BR> part of the wheel 15 of the radial compressor contains a magnetic ring 20 placed on<BR> the inner wall of the hollow in the front part of the wheel 15 of the radial compressor;<BR> on the magnetic ring 20, two permanent magnets 21 are placed in the direction towards the free space of the hollow. In the example of the design that is not shown 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.

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.

In the example of the design shown the stator 201 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 <BR> <BR> electromotor 2 placed in the hollow in the front part of the wheel 15 of the radial<BR> compressor. The multiphase winding 23 is coupled with the electric power supply unit<BR> for example using conductors 25 that run through one hollow radial rib 27 outside the<BR> actual body of the jet motor. In the example of the design shown the multiphase winding 23 is placed on the case 29 that is overhung in the covering body 240 using the screw 30.

The cooling of the stator 201 and the rotor 200 of the synchronous electromotor 2 is ensured in a suitable way. For example in the example of the design shown in the figure the 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 <BR> <BR> electromotor 2 is also supported by the radial duct 31 from the hollow in the front part<BR> 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.

In the example of the design not shown the 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.

For the start-up of the jet motor 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 not restricted to the shown and described designs of the jet motor; various modifications of the technical solution according to the structural settings of individual types of jet or turbine motors are also possible. A person competent in this field is able, on the basis of knowledge regarding this technical solution and exerting his/her common specialist capabilities, to utilize this technical solution in a suitable specific construction. Industrial use The technical solution is usable in jet motors, turbine motors, etc.