A fuel/air supply device including a fuel supply arrangement designed to convey fuel to a fuel outlet of the fuel/air supply device, a primary air supply arrangement designed to convey air to an air outlet of the fuel/air supply device, and a secondary air supply arrangement connecting the primary air supply arrangement to the fuel supply arrangement at a position upstream of a fuel compressor that is included in the fuel supply arrangement. The secondary air supply arrangement includes an air conduit that has a restricted portion for defining a relatively small air passage in the air conduit, and can be used for realizing a fuel/air mixture of low calorific value if so desired on the basis of a supply of air to the fuel without needing complex control measures.
F02C 9/40 - Control of fuel supply specially adapted to the use of a special fuel or a plurality of fuels
F02C 7/10 - Heating air supply before combustion, e.g. by exhaust gases by means of regenerative heat-exchangers
F02C 3/30 - Adding water, steam or other fluids to the combustible ingredients or to the working fluid before discharge from the turbine
F02C 3/22 - Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being gaseous at standard temperature and pressure
A heat exchanger suitable to be used as a recuperator in a micro gas turbine including a stack of cells. Each of the cells includes a pair of mutually spaced-apart plates and layers including heat exchange elements arranged at the outer surfaces of the plates and between the plates. Each of the layers including heat exchange elements can include at least one discrete spatial component incorporating a number of elements. Both a supply header and a discharge header of the heat exchanger can be made of only two components at the position of the stack of cells. Compensating for heat expansion effects can be via a bellows-shaped pipe portion of a supply conduit.
F28D 1/03 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
F28F 3/06 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being attachable to the element
F28F 3/02 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
F28F 3/08 - Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
A fuel/air supply device (19) comprises a fuel supply arrangement (12) designed to convey fuel to a fuel outlet of the fuel/air supply device (19), a primary air supply arrangement (11 ) designed to convey air to an air outlet of the fuel/air supply device (19), and a secondary air supply arrangement (16) connecting the primary air supply arrangement (11) to the fuel supply arrangement (12) at a position upstream of a fuel compressor (3) that is included in the fuel supply arrangement (12). The secondary air supply arrangement (16) includes an air conduit (17) that has a restricted portion (18) for defining a relatively small air passage in the air conduit (17), and can be used for realizing a fuel/air mixture of low calorific value if so desired on the basis of a supply of air to the fuel without needing complex control measures.
When the temperature of ambient air is relatively low, thermal output and thermal efficiency of a micro gas turbine (1) decrease. In order to compensate for the loss of thermal efficiency, the micro gas turbine (1) is equipped with a valve mechanism (13) by means of which the operation of the micro gas turbine (1) can be influenced and optimized, particularly by regulating a supply of hot gas from the cabinet (14) and/or the exhaust (8) of the micro gas turbine (1) to an inlet side of the compressor (2).
F02C 3/34 - Gas-turbine plants characterised by the use of combustion products as the working fluid with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle
F01D 15/10 - Adaptations for driving, or combinations with, electric generators
F01D 17/12 - Final actuators arranged in stator parts
F02C 1/06 - Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly characterised by the type or source of heat, e.g. using nuclear or solar energy using reheated exhaust gas
F02C 9/50 - Control of fuel supply conjointly with another control of the plant with control of working fluid flow
A heat exchanger (101) that is suitable to be used as a recuperator in a micro gas turbine comprises a stack (11) of cells (20). Each of the cells (20) includes a pair (21 ) of mutually spaced-apart plates (22, 23) and layers including heat exchange elements arranged at the outer surfaces of the plates (22, 23) and between the plates (22, 23). Each of the layers including heat exchange elements preferably comprises at least one discrete spatial component (51) incorporating a plurality of elements. Both a supply header (30) and a discharge header (40) of the heat exchanger (101) are preferably composed of only two components (31, 33; 41, 43) at the position of the stack (11) of cells (20). Means for compensating for heat expansion effects are also of uncomplicated design and may comprise a bellows-shaped pipe portion (27) of a supply conduit (26).
F28D 1/03 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
F28F 3/02 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
F28F 3/06 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being attachable to the element
7.
Combination of two interconnected shafts for high-speed rotors
A shaft joint has an inverse conical stopper. The joint is a combination of interconnected shafts, with one shaft being inserted into the other. The interface between the two shafts can be of any type: press-fit, thermally shrank, threaded, etc. Besides, the shaft-to-shaft interface can be also either bonded or non-bonded.
A surface burner for gas combustion has a burner surface which is fabricated by intertwining or interweaving an elongated flexible element across a distinct burner frame. This fabrication method can be best referred to as braiding, but also plaiting, lacing or another comparable method.
A rotary connector has a sleeve body having an end region, an opening, an inner surface with clamping surfaces, spokes, levers acting to press the clamping surface against an axle when the rotary connector is rotating, individual masses forming the outer body of the rotary connector, azimuthal gaps and radial gaps for allowing the individual masses to clamp or release an axle inserted into the rotary connector.
F16D 1/06 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
F16D 1/04 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with clamping hubCouplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with hub and longitudinal key
B23B 31/14 - Chucks with simultaneously-acting jaws, whether or not also individually adjustable involving the use of centrifugal force
F16D 1/08 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hubCouplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with hub and longitudinal key
10.
Integral method for vibration compensation and misalignment prevention in rotor dynamic systems
A method for suppressing vibrations, the method having the steps of providing a first device having a first rotating shaft, and a second device having a second rotating shaft. The orbits of the first rotating shaft are measured are analyzed, and the misalignment and unbalance is determined. The first rotating shaft and the bearings are then displaced to eliminate vibrations.
F16F 15/02 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system
F16C 23/00 - Bearings for exclusively rotary movement adjustable for aligning or positioning
F16F 15/00 - Suppression of vibrations in systemsMeans or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
A combination of two interconnected shafts for high-speed rotors This patent presents the invention of a shaft joint with an Inverse Conical Stopper. The joint is a combination of interconnected shafts. The joint is between two shafts. In the joint, one shaft is inserted into the other. The interface between the two shafts can be of any type: press-fit, thermally shrank, threaded, etc. The Inverse Conical Stopper: - Prevents swelling of the joint; - Enforces concentric alignment of the two shafts; and - Pre-stresses the interface. Besides, the shaft-to-shaft interface can be also either bonded or non-bonded. In the former case, the Inverse Conical Stopper also prevents failure of the bond by: Reducing loads on the bond by using the pre-stress to (partly) compensate for the centrifugal load. The Inverse Conical Stopper makes the joint particularly suitable for high centrifugal loads and high rotation speeds.
A method for manufacturing an inexpensive micro gas turbine has an existing compressor-turbine unit divided into two separate parts being a compressor and a turbine. The compressor and turbine shafts are joined. Two existing bearing units are taken, wherein one of them may belong to the existing compressor-turbine unit. The rotor of an existing generator is mounted on the joined shaft. A generator housing is manufactured and connected to the bearing units. The stator of an existing generator is mounted into the generator housing. Energy input into the working cycle of the gas turbine can be implemented by adding either an internal burner or external burner with a heat exchanger. By using inexpensive and often mass produced off-the-shelf components, a cost effective micro gas turbine can be derived.
F02B 57/04 - Control of cylinder-charge admission or exhaust
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
B21K 25/00 - Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
F01D 25/24 - CasingsCasing parts, e.g. diaphragms, casing fastenings
A braided surface burner (1) for premixed gas-phase combustion includes a burner surface fabricated by intertwining or interweaving an elongated flexible element (9) across a distinct burner frame (3). This fabrication method can be best referred to as braiding, but also plaiting, lacing or another comparable method.
An Integral Method for Vibration Compensation and Misalignment Prevention in Rotor Dynamic Systems. A method for suppressing vibrations in a first device (1) provided with a first rotating shaft (5) which is connected to a second rotating shaft (7) of a second device (3), which first and second shafts (5,7) are each joumaled at two places at distance of each other, and which vibrations are caused by misalignment between the first and second shafts (5,7) and unbalance of the first shaft (5), is characterized in that during rotation of the first shaft (5), the orbits of the centre of the first shaft (5) at the bearings are measured, then these orbits are analysed and the misalignment and unbalance are determined, after which still during rotation of the first shaft (5), the first device (1) is displaced to eliminate the misalignment and the bearings are displaced in radial direction to eliminate vibrations due to unbalance. First the misalignment will be eliminated, then the vibrations due to the unbalance will be eliminated which again may cause misalignment which then first will be eliminated before the vibrations due to unbalance will be further eliminated.
F16F 15/00 - Suppression of vibrations in systemsMeans or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
F16F 15/02 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system
15.
COMBUSTOR WITH A SINGLE LIMITED FUEL-AIR MIXING BURNER AND RECUPERATED MICRO GAS TURBINE
According to the invention, a recuperated micro gas turbine combustor has a casing (23), liner (27), fuel injector (33) and a flame stabilization device (29). This flame stabilization device is characterized by a swirl strength and air passage geometry as such that the pressure loss over the device is less than 1,5%. The flame stabilization device and the fuel injector form together with the liner inlet/head hardware a single burner. The position of the fuel injector with respect to the flame stabilization device is optimized for limited fuel mixing with only part of the air through the flame stabilization device. The burner first stages combustion of the mixed fuel and then mixing with the remaining air. Particularly, combustion is complete and mixing occurs as such that NOx can never increase above single-digit ppm.
The invention relates to a method for manufacturing an inexpensive micro gas turbine 1. According to this method, an existing compressor-turbine unit is divided into two separate parts being a compressor 3 and a turbine 5. The compressor and turbine shafts are joined. Two existing bearing units (11 and 17) are taken, wherein one of them may belong to the existing compressor-turbine unit. The rotor 25 of an existing generator 7 is mounted on the joined shaft. A generator housing 21 is manufactured and connected to the bearing units. The stator 23 of an existing generator 7 is mounted into the generator housing. Energy input into the working cycle of the gas turbine can be implemented by adding either an internal burner or external burner with a heat exchanger. By using inexpensive and often mass produced off-the-shelf components, a cost effective micro gas turbine can be derived.
The reaction turbine engine has a single rotor member co tnprising an inlet, compressor, heating chamber, which can be a combustion chamber, and turbine. The generator comprises a rotor part and a stator part. The rotor member of the reaction turbine engine comprises the rotor part of the generator. The generator's rotor can be also cooled by the working medium of the engine. Other measures, such an insulating separation and additional cooling ducts, can be also incorporated into the assembly. A further integration can be achieved by additionally exploiting the rotor and stator parts of the generator as a magnetic bearing for the entire assembly.
F01D 15/10 - Adaptations for driving, or combinations with, electric generators
F02C 3/16 - Gas-turbine plants characterised by the use of combustion products as the working fluid characterised by the arrangement of the combustion chamber in the plant the combustion chambers being formed at least partly in the turbine rotor
Reaction turbine engine (1,21,41) with additional compressor. The reaction turbine engine comprises a rotor member (2,22,42), which has an inlet (95,97), a compressor (10,23,50), a heating chamber (11,31,51) and a turbine (12,28,62). The heating chamber can be a combustion chamber. It is proposed to integrate an additional compressor (3,53) upstream the inlet in order to increase the output and efficiency of such a reaction turbine engine. This additional compressor has a rotor part (13,63) and a stator part (14,64). The rotor part is coupled with the rotor member (2,22,62) of the reaction turbine engine and turns at the same rotational speed with it. The working medium is brought from the additional compressor to the inlet of the engine's rotor member through a stationary conduit (9,69) with a sealing element. An electric generator (4) can be coupled with the reaction turbine engine. Besides, the residual heat in the engine exhaust can be profitably employed in a heating system. Therefore, a reaction turbine engine implemented in this way can be used for power generation (such as electric power) in various systems, as well as for combined power and heat generation (e.g. in central heating systems, auxiliary heaters, etc.). Besides, the engine is suitable for both stationary and mobile applications.
F02C 3/045 - Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor having compressor and turbine passages in a single rotor
F02C 3/08 - Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor the compressor comprising at least one radial stage
F02C 3/16 - Gas-turbine plants characterised by the use of combustion products as the working fluid characterised by the arrangement of the combustion chamber in the plant the combustion chambers being formed at least partly in the turbine rotor
F02C 3/30 - Adding water, steam or other fluids to the combustible ingredients or to the working fluid before discharge from the turbine
Rotary combustion device (1) with rotary combustion chamber (4). Specific measures are taken to provide ignition of a combustible mixture. It is proposed that a hollow tube be provided coaxially with the axis of rotation (6), so that a small part of the mixture is guided into the combustion chamber. At the position of said axis of rotation (6) the mixture is ignited (8), and said ignition extends to the combustion chamber (4). For stabilization of the flame in the combustion chamber flame stabilization means (17, 27, 37, 47, 57, 67) are used. The flame stabilization means can comprise heat distribution means, (37, 47, 57) such as spokes, ribs, scales and the like. It is also possible to supply external heat (17). Another option is to provide a radiator (67). In order to promote the combustion, it is also possible to arrange for the combustion chamber to extend radially relative to the axis of rotation. The combustion gas flow in this case can be directed towards the axis of rotation as well as away from the axis of rotation.
F02C 3/16 - Gas-turbine plants characterised by the use of combustion products as the working fluid characterised by the arrangement of the combustion chamber in the plant the combustion chambers being formed at least partly in the turbine rotor
