EP4381178A1 - Verfahren zum versorgen eines luftlagers eines flugantriebssystems mittels eines brennstoffzellen-systems sowie flugantrieb - Google Patents
Verfahren zum versorgen eines luftlagers eines flugantriebssystems mittels eines brennstoffzellen-systems sowie flugantriebInfo
- Publication number
- EP4381178A1 EP4381178A1 EP22753997.0A EP22753997A EP4381178A1 EP 4381178 A1 EP4381178 A1 EP 4381178A1 EP 22753997 A EP22753997 A EP 22753997A EP 4381178 A1 EP4381178 A1 EP 4381178A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air bearing
- fuel cell
- bearing
- process gas
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 122
- 239000007789 gas Substances 0.000 claims abstract description 148
- 239000003570 air Substances 0.000 claims abstract description 123
- 239000012080 ambient air Substances 0.000 claims abstract description 21
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 6
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 13
- 239000001257 hydrogen Substances 0.000 description 13
- 229910052739 hydrogen Inorganic materials 0.000 description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000007800 oxidant agent Substances 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04111—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
-
- 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
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/22—Lubricating arrangements using working-fluid or other gaseous fluid as lubricant
-
- 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
- F02C7/06—Arrangements of bearings; Lubricating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04776—Pressure; Flow at auxiliary devices, e.g. reformer, compressor, burner
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D41/00—Power installations for auxiliary purposes
- B64D2041/005—Fuel cells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/50—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C29/00—Bearings for parts moving only linearly
- F16C29/02—Sliding-contact bearings
- F16C29/025—Hydrostatic or aerostatic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1005—Construction relative to lubrication with gas, e.g. air, as lubricant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
Definitions
- the invention relates to a method for supplying an air bearing using a fuel cell system which has at least one anode and at least one cathode and a process gas device for supplying the anode and the cathode with fuel and ambient air and for discharging used process gases.
- Air bearings utilize a thin film of pressurized gas to provide a low-friction, load-bearing interface between surfaces.
- the two surfaces do not touch, avoiding the traditional bearing-related problems of friction, wear, particles, and lubricant handling, and provide distinct advantages in precision positioning, such as: B. Backlash and static friction, as well as in high-speed applications.
- Aerostatic air bearings in particular require a supply of compressed air to build up or ensure the pressure cushion during operation.
- a compressor is usually provided to supply the air bearing, which compressor feeds compressed air to the air bearing.
- Air bearings are preferred in and for mounting high-speed machines, i. H. especially at high speed ranges. Air bearings work without contact and therefore almost without abrasion. Thus, the service life of air bearings is very long if they are properly designed and calculated. However, the decisive factor for the error-free function of the air bearing is the continuous supply of the air bearing with a sufficient quantity of compressed gas or gas mixture.
- a method for supplying an air bearing by means of a fuel cell system is proposed in a first aspect, which at least one Has anode and at least one cathode and a process gas device for supplying the anode and the cathode with fuel and ambient air and for discharging used process gases.
- a process gas from the process gas device of the fuel cell system is supplied to the air bearing as bearing gas.
- An air bearing within the meaning of the invention is a bearing in which two bearing partners that are moved relative to one another are separated by a gas mixture in the form of a bearing gas.
- an air bearing is an aerodynamic bearing or an aerostatic bearing to which a gas mixture, in particular a compressed gas mixture, is fed in order to build up and maintain a gas cushion, gas gap or gas film containing a gas mixture during operation.
- the air bearing can be designed as a nozzle air bearing, in which the pressurized gas mixture is guided into a bearing gap via inflow nozzles.
- a fuel cell system preferably has a large number of fuel cells which are arranged, for example, in the form of fuel cell stacks. Such a fuel cell arrangement, which correspondingly has at least one fuel cell, is simply referred to as “at least one fuel cell” within the scope of the description of the invention.
- the multiplicity of fuel cells usually also has a multiplicity of anodes, which are supplied with a fuel, such as in particular hydrogen, for generating electrical energy, and a multiplicity of cathodes, which are supplied with ambient air in cooperation with the anodes for generating electrical energy , in order to supply the atmospheric oxygen contained therein to the fuel cell as an oxidizing agent.
- a process gas device is set up to conduct process gas and supplies the fuel cell with reactants required for generating electrical energy via the process gas and discharges used process gas from the fuel cell.
- the process gas device is set up to supply the anode with fuel and to supply the cathode with oxidizing agent and to discharge or circulate, in particular, at least partially consumed process gases.
- a reducing agent such as hydrogen is fed to the anode and an oxidizing agent such as ambient air is fed to the cathode.
- the Hydrogen is catalytically oxidized to hydrogen ions with the loss of electrons.
- reaction gases can be formed, for example nitrogen, which are present in the process gas, in particular the used one, in the process gas device and are discharged from the fuel cell.
- the process gas device thus forms an open gas circuit.
- process gas is removed from the process gas device of the fuel cell system and fed to the air bearing as storage gas.
- the process gas is already in a compressed state in the fuel cell system, which reduces the additional compression effort, for example to achieve an operating gas pressure of the air bearing.
- a compressed air supply for the air bearing can be omitted and the complexity of the compressed air supply for the air bearing can thus be reduced.
- Providing a separate compressor, for example to supply compressed ambient air to the air bearing can be omitted in the method according to the invention.
- the bearing gas is additionally compressed before being fed to the air bearing.
- the process gas present in the process gas device has a certain overpressure due to the system.
- the bearing gas can be compressed to a predetermined pressure, in particular the operating pressure of the air bearing, and fed to the air bearing in order to ensure reliable separation of the bearing partners of the air bearing.
- the bearing gas comes from an anode side of the fuel cell, in particular the anode output side, and is preferably taken from an anode circulation.
- the fuel cell On the anode side, the fuel cell is supplied with fuel from a fuel reservoir via the process gas device, and most of the fuel is consumed in the fuel cell.
- the used process gas is discharged from the fuel cell and with the help of an anode circulation fuel that has not been completely used can be fed back to the anode of the fuel cell via the process gas are or in particular released to the environment.
- process gas that has already passed through the fuel cell at least once, ie used process gas is routed to the air bearing as bearing gas. The efficiency of the fuel cell system can be increased by further utilizing the consumed process gas or its pressure energy.
- the air bearing is fed with process gas from the fuel store as the bearing gas.
- process gas can be taken as fuel directly from the fuel store or the process gas device before being fed to the fuel cell and fed to the air bearing.
- the process gas is preferably pre-compressed or the bearing gas can be additionally compressed before being fed to the air bearing.
- Bearing gas can be fed in from the fuel store independently of whether the fuel cell system is being operated or whether it is at rest. This ensures that the air bearing is supplied at all times, regardless of the operating state of the fuel cell system or the fuel cell.
- the bearing gas includes nitrogen or dinitrogen (N 2 ).
- nitrogen formed in the fuel cell can be supplied to the anode on the anode side of the fuel cell via the process gas.
- nitrogen can accumulate in the process gas device, which is at least sporadically discharged.
- the overall efficiency of the process can be increased by using the nitrogen-containing process gas to be discharged to feed the air bearing. Feeding the air bearing with nitrogen as the inert gas can prevent a degradation process within the air bearing, since moisture and other residual gases are displaced when an inert gas is used.
- the bearing gas comes from a cathode side of the fuel cell.
- ambient air is supplied from the environment via the process gas device and reacts in the fuel cell.
- the used ambient air is discharged from the fuel cell via the process gas by means of the process gas device and can be discharged to the environment.
- the supply of process gas to the air bearing from the cathode side has the advantage that the process gas originating from the environment is available in unlimited quantities and is already provided in compressed form in the process gas device.
- a supply device for an air bearing in connection with a fuel cell system is proposed in a second aspect.
- the fuel cell system has at least one anode and at least one cathode as well as a process gas device for supplying the anode and the cathode with fuel and ambient air and for discharging used process gases.
- the supply device has at least one supply line from the process gas device to the air bearing, by means of which a process gas from the process gas device of the fuel cell system can be fed to the air bearing as bearing gas.
- Such a process gas device can, for example, have a fuel supply, by means of which a fuel, preferably in the form of hydrogen, is supplied to the anode.
- the process gas device preferably has an air supply, by means of which the cathode is supplied with an oxidizing agent via the ambient air, so that the hydrogen can react with the oxygen in the air in the fuel cell, with gaseous reaction products and water being formed, for example.
- the water can be discharged to the environment, remaining hydrogen and the gaseous reaction products or the residual gas can be released directly to the environment via the process gas device.
- the process gas device includes a line system, which connects a fuel store and the environment with the fuel cell, in particular its anode(s) and cathode(s), for gas exchange in at least one open gas circuit.
- the process gas device preferably has at least one valve, a distributor or a compressor for conducting the process gases.
- used process gases are generated, for example, which can be used to feed the air bearing. If, for example, hydrogen is used as a fuel, the reaction taking place in the fuel cell produces energy, water and residual gas.
- the residual gas in the process gas device can be fed to the air bearing via the feed line in order to build up and maintain an operating pressure of the air bearing in order to ensure the function of the air bearing and to prevent damage to the air bearing due to a pressure drop avoid.
- process gas can be made available as bearing gas for the air bearing by means of the fuel cell system.
- the bearing gas for example, when an aerodynamic air bearing is switched on and/or off, an operating pressure can be built up or reduced in order to avoid damage to the bearing outside the functional operating range that ensures the provision of the aerodynamic bearing pressure. In this way, damage, in particular when it is put into operation again, and an associated shortening of the service life of the aerodynamic air bearing can be counteracted.
- An arrangement of the air bearing and fuel cell system in relative spatial proximity to one another, in particular directly adjacent, allows compressed bearing gas to be supplied quickly in order to reduce losses, in particular a pressure loss, via the feed line. If the fuel cell system is used, for example, to provide energy for a motor or drive mounted by means of the air bearing, a spatial assignment of the air bearing to the fuel cell system through a short transport route for the air bearing can be advantageous.
- the supply line has a compression device.
- the compression device can be designed, for example, as a piston compressor or screw compressor.
- the process gas is compressed, in particular additionally, before it is fed to the air bearing.
- the bearing gas for the air bearing is compressed to an overpressure of at least 3 to 6 bar, the overpressure preferably being the operating pressure of the air bearing. Compression to, in particular, 4 to 8 times the overpressure can be provided for vehicle applications.
- an increased compression capacity is required for the compression of ambient air to the predetermined operating pressure of the air bearing, in particular during flight operations. Since, according to the proposed supply device or the supply method, the storage gas comes from the process gas device and the process gas is therefore already in a compressed state, an absolute or additional compression effort is reduced, for example compared to a solution in which the ambient air is compressed by means of a compressor.
- the supply line connects the anode side of the fuel cell, in particular the anode output side, to the air bearing.
- the anode side of the fuel cell includes, in particular, an anode circulation, as already explained with regard to the method.
- Process gas consumed in the fuel cell in particular in the form of nitrogen, is fed to the anode via the anode side of the fuel cell.
- the air bearing is designed to support a rotating device, in particular a rotating machine.
- a rotating device preferably has at least one element rotating about an axis, in particular its own axis, or the device is mounted in its entirety so that it can rotate relative to the air bearing.
- the air bearing is designed to support a turbo compressor or, in particular, a high-speed centrifugal compressor. With the device according to the invention, such an air bearing can be at least additionally supplied with bearing gas in order to ensure or at least support a uniform supply of bearing gas to the air bearing and thus non-contact bearing at high loads.
- the air bearing is designed as a linear or planar air bearing, which enables a linear relative movement of the bearing partners.
- air bearings of linear drives such as those used for measurement applications or production technologies, can have a supply device according to the invention or can be operated or at least supported with a method according to the invention.
- an at least supporting application in the area of transport systems in particular air cushion transport systems or medical technology, is also conceivable.
- the air bearing is assigned to a motor, in particular an electric motor.
- the motor can be supplied and/or operated at least partially with the energy generated in the fuel cell system.
- the electric motor preferably has a rotor and a stator, it being possible for both the rotor and the stator to be mounted by means of the air bearing.
- the fuel cell system is advantageously arranged close to the air bearing and in particular close to a motor or drive, which is operated with the energy generated in the fuel cell system, in order to keep line-related losses low and to be able to use the bearing gas close to its source .
- the motor can be designed as a ring motor or torque motor with a hollow shaft.
- a ring motor preferably comprises an essentially hollow-shaft-shaped rotor and an essentially hollow-shaft-shaped rotor.
- the ring motor can be designed as an external rotor, with the stator being arranged on the inside and the rotor on the outside, or as an internal rotor, with the rotor being arranged on the inside and the stator on the outside.
- External rotors are more common in torque motors because, due to the relationships shown below, a greater torque is available for the same size.
- a bearing between the rotor and the stator can be ensured by an air bearing with the supply device according to the invention.
- a supply device according to the invention or a method according to the invention can also be used to, in particular at least partially, support an existing compressed gas supply system for an air bearing.
- a further aspect of the invention relates to an aircraft engine with a fuel cell system and a supply device, the aircraft engine having at least one air bearing which can be supplied with a bearing gas by the supply device.
- the air bearing can be designed to support at least one drive rotor and can support the at least one drive rotor.
- a further aspect of the invention relates to use of the supply device according to one or more embodiments of the preceding description for carrying out one or more embodiments of the method for supplying an air bearing, which was also described above.
- FIG. 1 shows a schematic representation of an exemplary supply device according to the invention of an air bearing in connection with a fuel cell system
- FIG. 2 shows a schematic representation of a flow chart of the method according to the invention.
- FIG. 1 shows a schematic representation of an exemplary supply device 10 according to the invention of an air bearing 11 in connection with a fuel cell system 12.
- the fuel cell system 12 has a fuel cell 13 with an anode 14 and a cathode 15.
- the anode 14 is supplied with fuel, in the exemplary embodiment with hydrogen, from a fuel reservoir 16 via a process gas device 17 .
- the cathode 15 is supplied with ambient air taken from the environment 18 via the process gas device 17 .
- the atmospheric oxygen contained serves as an oxidizing agent for generating electrical energy through the fuel cell 13.
- the hydrogen can react with the oxygen in the air, with energy, water and residual gas being formed.
- the water can simply be discharged to the environment.
- Fuel that has not been completely consumed can be discharged directly to the environment 19 or returned to the anode 14 via an anode circulation 24 of the process gas device 17 .
- a feed line 20 connects the anode side of the process gas device 17 and its anode circulation 24 to the air bearing 11.
- Process gas from the process gas device 17 can be fed to the air bearing 11 as bearing gas via the feed line 20.
- the air bearing 11 is particularly advantageously fed with used process gas from the anode side of the process gas device 17 or the fuel cell 13, which has passed through the fuel cell 13 at least once.
- the feed line 20 has a compression device 21 by means of which the process gas can be compressed at least additionally in order to compress the bearing gas to an operating pressure of the air bearing 11 .
- Bearing gas can be released from the air bearing 11 to the environment 22 .
- the air bearing 11 is preferably designed as a rotary air bearing and is set up to mount a motor (not shown in FIG. 1), in particular an electric motor, or a drive. In this case, this motor or drive is preferably supplied with energy which is generated during operation of the fuel cell system 12 .
- the feed line 20 can also connect a part of the process gas device 17 on the cathode side or the fuel reservoir 16 to the air bearing 11 .
- bearing gas can take place independently of the fuel cell 13 or the fuel cell system 12 being operated.
- Fig. 2 shows a schematic representation of a flow chart of the method 100 according to the invention for supplying an air bearing 11 by means of a fuel cell system 12, the fuel cell system 12 having at least one anode 14 and at least one cathode 15 as well as a process gas device 17 for supplying the anode 14 and the cathode 15 with fuel and ambient air and for discharging used process gases.
- fuel for example hydrogen
- a step 101 fuel, for example hydrogen
- ambient air is supplied to the cathode 15 via the process gas device 17, it being possible for steps 101 and 102 to be carried out essentially simultaneously.
- the hydrogen reacts with the atmospheric oxygen in the ambient air in the fuel cell 13, with energy, water and used process gas being produced.
- the used process gas is returned from the anode outlet side via an anode circulation 24 of the process gas device 17 to the anode 14 or the anode inlet side.
- a step 105 used process gas of the process gas device 17 is supplied to the air bearing 11 as bearing gas via a supply line 20.
- the used process gas is compressed to a predetermined operating pressure of the air bearing 11 before it is fed to the air bearing 11 .
- the supply device 10 shown schematically in FIG. 1 is suitable for carrying out the method 100 described in FIG. 2 .
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021120471.2A DE102021120471A1 (de) | 2021-08-06 | 2021-08-06 | Verfahren zum Versorgen eines Luftlagers mittels eines Brennstoffzellen-Systems |
| PCT/DE2022/100559 WO2023011689A1 (de) | 2021-08-06 | 2022-08-02 | Verfahren zum versorgen eines luftlagers eines flugantriebssystems mittels eines brennstoffzellen-systems sowie flugantrieb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4381178A1 true EP4381178A1 (de) | 2024-06-12 |
Family
ID=82851530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22753997.0A Pending EP4381178A1 (de) | 2021-08-06 | 2022-08-02 | Verfahren zum versorgen eines luftlagers eines flugantriebssystems mittels eines brennstoffzellen-systems sowie flugantrieb |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240258535A1 (de) |
| EP (1) | EP4381178A1 (de) |
| DE (1) | DE102021120471A1 (de) |
| WO (1) | WO2023011689A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022133702A1 (de) | 2022-12-16 | 2023-03-02 | MTU Aero Engines AG | Mantelstromtriebwerk |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006003799B4 (de) | 2006-01-25 | 2010-05-06 | Daimler Ag | Brennstoffzellensystem mit Brennstoffzelle, Wasserstoffspeicher und Anodenkreislauf und dessen Verwendung |
| DE102006056354B4 (de) | 2006-11-29 | 2013-04-11 | Airbus Operations Gmbh | Hybridantrieb für ein Flugzeug |
| DE202007006976U1 (de) * | 2007-05-15 | 2008-09-18 | Jung, Nadine | Hubschrauber |
| DE102010023671A1 (de) | 2010-06-12 | 2011-12-15 | Daimler Ag | Brennstoffzellensystem mit einer in einem Gehäuse angeordneten Brennstoffzelle |
| DE102016009932A1 (de) | 2016-08-16 | 2018-03-08 | Daimler Ag | Vorrichtung zur Luftversorgung einer Brennstoffzelle |
| DE102017220855A1 (de) | 2017-11-22 | 2019-05-23 | Robert Bosch Gmbh | Turbokompressor, insbesondere für ein Brennstoffzellensystem |
| DE102018204653A1 (de) | 2018-03-27 | 2019-10-02 | Robert Bosch Gmbh | Brennstoffzellensystem und dessen Verwendung |
| DE102018112460A1 (de) | 2018-05-24 | 2019-11-28 | Man Energy Solutions Se | Vorrichtung mit einem Turbolader zur Aufladung einer Brennstoffzelle |
| DE102020004510A1 (de) | 2020-07-25 | 2020-09-17 | FEV Group GmbH | Luftfahrzeug mit Hybridantrieb |
-
2021
- 2021-08-06 DE DE102021120471.2A patent/DE102021120471A1/de active Pending
-
2022
- 2022-08-02 WO PCT/DE2022/100559 patent/WO2023011689A1/de not_active Ceased
- 2022-08-02 US US18/290,979 patent/US20240258535A1/en active Pending
- 2022-08-02 EP EP22753997.0A patent/EP4381178A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023011689A1 (de) | 2023-02-09 |
| DE102021120471A1 (de) | 2023-02-09 |
| US20240258535A1 (en) | 2024-08-01 |
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