Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D23/00—Other rotary non-positive-displacement pumps
  • F04D23/008—Regenerative pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D25/00—Pumping installations or systems
  • F04D25/02—Units comprising pumps and their driving means
  • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
  • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D25/00—Pumping installations or systems
  • F04D25/02—Units comprising pumps and their driving means
  • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
  • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
  • F04D25/0653—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the motor having a plane air gap, e.g. disc-type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/02—Selection of particular materials
  • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/08—Sealings
  • F04D29/083—Sealings especially adapted for elastic fluid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/58—Cooling; Heating; Diminishing heat transfer
  • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
  • F04D29/5853—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps heat insulation or conduction
• • 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
  • F05D2300/00—Materials; Properties thereof
  • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
  • F05D2300/611—Coating
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/30—Hydrogen technology
  • Y02E60/50—Fuel cells

Definitions

• the present invention relates to a side channel compressor for a fuel cell system for conveying and / or compressing a gaseous medium, in particular hydrogen, which is intended in particular for use in vehicles with a fuel cell drive.
• gaseous fuels will also play an increasing role in the future.
• Hydrogen gas flows must be controlled, especially in vehicles with fuel cell drives.
• the gas flows are no longer controlled discontinuously, as is the case with the injection of liquid fuel, but the gas is taken from at least one high-pressure tank and fed to an ejector unit via an inflow line of a medium-pressure line system.
• This ejector unit leads the gas to a fuel cell via a connecting line of a low-pressure line system. After the gas has flowed through a fuel cell, it is returned to the ejector unit via a return line.
• the side channel compressor can be interposed, which supports the gas recirculation in terms of flow and efficiency.
• side-channel compressors are used to support the flow build-up in the fuel cell drive, especially when the vehicle is (cold) started after a certain idle time.
• These side channel blowers are usually driven by electric motors, which are supplied with voltage from the vehicle battery when they are operated in vehicles.
• a side channel compressor for a fuel cell system in which a gaseous medium, in particular hydrogen, is conveyed and / or compressed.
• the Be tenkanalverêtr has a housing and a drive, the Housing has a housing upper part and a housing lower part. Furthermore, a circumferential about an axis of rotation compressor terraum is arranged in the housing, which has at least one circumferential side channel.
• a compressor wheel which is arranged rotatably about the axis of rotation and is driven by the drive, the compressor wheel having impeller blades arranged on its circumference in the area of the compressor chamber.
• the side channel compressor known from DE 2017 102 15739 and DE 10 2018204 713 A1 each has a gas inlet opening and a gas outlet opening formed on the housing, which are fluidically connected to one another via the compressor room, in particular the at least one side channel.
• the side channel compressor known from DE 2017 102 15739 and DE 102018204713 A1 may have certain disadvantages.
• the drive consists of components that, due to their material properties, can be damaged by the anode medium, especially hydrogen, if you come into contact with them.
• the side channel blower known from DE 2017 102 15739 and DE 102018204713 A1 can have the disadvantage that certain parts of the drive or side channel blower do not heat up quickly enough during a cold start procedure, which means that there is a risk of damage from ice bridges that cause the Can reduce the service life of the side channel compressor and / or the fuel cell system. Disclosure of the Invention Advantages of the Invention
• a side channel compressor for a fuel cell system for conveying and / or compressing a gaseous medium, in particular hydrogen, is provided with the features of the independent claims.
• a side channel compressor in which a drive has a stator and a rotor, the rotor being at least almost completely enclosed by means of an encapsulation element and thus in particular encapsulated from the environment.
• an encapsulation element effectively shields the rotor from contact with the surrounding medium, which increases the service life of the drive and thus of the side channel compressor, and thus reduces the probability of failure due to failing construction parts of the drive.
• the encapsulation of the drive and / or the rotor can be implemented in a compact design by means of the encapsulation element that at least almost completely surrounds the rotor, so that no or only minimal structural changes need to be made to the drive and / or the side channel compressor .
• the inventive and advantageous embodiment of the invention He can be implemented in a cost-effective manner.
• the drive is designed as a radial internal rotor electric motor, the drive, in particular the rotor, being connected to a compressor wheel via a drive shaft, the drive shaft, the compressor wheel and the rotor being rotatable about an axis of rotation and wherein the rotor and the compressor wheel are connected to the drive shaft in a form-fitting, cohesive or force-fitting manner.
• a cost-effective installation of the encapsulation element can be made without further or at least only minor structural changes to the drive and / or to the side channel compressor being necessary. This reduces the assembly costs and thus the production costs of the side channel blower while the probability of failure of the side channel blower can be reduced.
• the rotor has at least one permanent magnet and / or the encapsulation element is designed as a stainless steel cap, which has at least stainless steel.
• the advantage can be achieved that the failure probability of the rotor and / or the entire drive can be reduced.
• This can be achieved in such a way that the components of the assembly group that are sensitive to hydrogen, such as the soft magnetic materials of the permanent magnet, are relocated to an internal area, while the components of the assembly group that are particularly insensitive to hydrogen, such as stainless steel in the external surrounding area can be relocated.
• This offers the advantage that the service life of the drive and thus of the entire side channel compressor can be increased.
• the rotor is attached to the drive shaft in such a way that it is flush with the drive shaft on the side facing away from the compressor wheel, the stainless steel cap having an opening on its side facing the compressor wheel in the area of the drive shaft and the stainless steel cap being the completely encloses the rotor placed on the drive shaft, except for the area of the opening.
• the advantage can be achieved that a compact design of the drive and / or the side channel compressor can be maintained or brought about.
• the drive shaft and the stainless steel cap are frictionally, positively or cohesively connected to one another in the area of the opening in such a way that the rotor, in particular the permanent magnet, is encapsulated in an external area.
• the advantage can be achieved that efficient encapsulation of the sensitive components and / or materials of the rotor can be achieved by means of the stainless steel cap, the only area of the stainless steel cap being through the Hydrogen or other substances could penetrate the inner area of the rotor and damage the soft magnetic materials, especially the area of the opening.
• This advantage is achieved by a permanently encapsulating connection between the stainless steel cap and the drive shaft, which can reduce the probability of failure of the drive and / or the side channel blower.
• the drive is designed as an axial field electric motor which has the stator and the rotor, wherein the stator and the rotor are designed in a disk-shaped circumferential manner around the axis of rotation and the stator is arranged in the direction of the axis of rotation next to the rotor is.
• the stator and the rotor are designed in a disk-shaped circumferential manner around the axis of rotation and the stator is arranged in the direction of the axis of rotation next to the rotor is.
• the compact design of the side channel blower offers the advantage that the side channel blower cools down more slowly at low ambient temperatures, especially in the range below 0 ° C, and thus the formation of ice bridges can be delayed longer.
• the rotor has at least the permanent magnet, a rotor hub and a fixing disk, the encapsulation element at least almost completely enclosing the rotor hub and / or the permanent magnet and thus encapsulating an external area.
• the encapsulation element at least almost completely enclosing the rotor hub and / or the permanent magnet and thus encapsulating an external area.
• the embodiment of the side channel compressor according to the invention enables reliable encapsulation of the rotor, in particular the rotor hub and / or the permanent magnets.
• the encapsulation element has an at least two-layer structure, the first layer being made of an elastically deformable material, in particular an elastomer, and the second layer being made of stainless steel.
• the first layer being made of an elastically deformable material, in particular an elastomer
• the second layer being made of stainless steel.
• the encapsulation element consists of at least one elastomer sealing element with a pressed-on stainless steel cap.
• the encapsulation element having at least two layers, which in particular has at least two materials with different properties can be pre-assembled before it is mounted on the drive and / or on the rotor and / or on the compressor wheel is attached.
• the assembly costs and the required assembly time as well as assembly errors can be reduced. This offers the advantage of lower overall costs for the side channel compressor and, due to the reduced probability of occurrence of assembly errors, a lower failure probability of the drive and / or the side channel compressor.
• a flow of current to the stator takes place and induces inductive heating of the rotor and / or the encapsulation element, in particular the encapsulation element which has at least stainless steel, due to the material properties it can be heated inductively particularly well.
• the material stainless steel has a high electrical conductivity, which makes it easier to heat inductively. The heating occurs as an effect due to an electrical application by means of a magnetic field, more specifically by means of eddy current losses, since the layer made of stainless steel is an electrically conductive body.
• the rotor is inductively warmed up when the coils of the stator are briefly energized, in particular due to the resulting power loss, which is released as thermal energy.
• the rotor which consists in particular of a thermally conductive material, can be heated, which is particularly advantageous in the case of a cold start procedure for the side-channel compressor and / or the vehicle. He warms the rotor and transfers, for example due to the high thermal conductivity of the material used, the thermal energy to the compressor wheel.
• the heat energy transfer takes place in one flow direction in the loading area between the compressor wheel and a housing in which ice bridges have formed.
• These ice bridges can lead to damage to the side channel compressor when the side channel compressor is started up and / or prevent rotation of the compressor wheel in the housing due to a blockage.
• a break can be caused, in which sharp-edged pieces of ice are released, which can damage components behind the side channel compressor and / or a fuel cell, in particular the membrane of the fuel cell, in the conveying direction.
• the ice bridges melt and the liquid changes from a solid to a liquid state of aggregation and can be discharged, for example by means of a purge valve and / or drain valve present in the fuel cell system.
• a purge valve and / or drain valve present in the fuel cell system.
• Figure 1 is a schematic sectional view of a side channel compressor according to the invention
• FIG. 2 shows a part of the side channel compressor according to the invention according to a first exemplary embodiment in a perspective representation
• FIG. 3 shows a part of the side channel compressor according to the invention in accordance with a second exemplary embodiment in a perspective representation.
• FIG. 1 shows a longitudinal section through a rotationally symmetrical to an axis of rotation 4 formed according to the invention proposed Be tenkanalverdrucker 1 can be seen.
• the side channel compressor 1 has a compressor wheel 2, which is in particular designed as a closed disk-like compressor wheel 2 and is rotatably mounted in a housing 3 about the horizontally extending axis of rotation 4.
• a drive 6, in particular an electric drive 6, serves as a rotary drive 6 of the compressor wheel 2.
• the drive 6 can be designed as a radial internal rotor electric motor 6 according to a first exemplary embodiment or as an axial field electric motor 6 according to a second exemplary embodiment be.
• the drive 6 can have a plurality of cooling ribs 33.
• the housing 3 comprises an upper housing part 7 and a lower housing part 8, which are connected to one another.
• the compressor wheel 2 is rotatably mounted on a drive shaft 9 and is enclosed by the housing upper part 7 and the housing lower part 8 to.
• the compressor wheel 2 can in particular be supported indirectly via a rotor hub 29 (shown in FIG. 3) and at least one bearing 27 on a bearing journal which is located, for example, in the upper housing part 8.
• the compressor wheel 2 has an inner compressor wheel hub 10, the compressor wheel hub 10 having a recess through which the drive shaft 9 is inserted and the compressor wheel hub 10 connected to the drive shaft 9 in particular by means of a press fit is.
• the compressor wheel hub 10 is also circumferentially limited by a hub foot 12 on the side facing away from the axis of rotation 4.
• at least one seal 23 running around the axis of rotation 4 is arranged on the outer diameter of the drive shaft 9, in particular axially to the axis of rotation 4 between the hub base 12 and the drive 6 and radially to the axis of rotation 4 between the drive shaft 9 and the housing Top 7.
• the compressor wheel 2 From the hub foot 12 outwardly away from the axis of rotation 4, the compressor wheel 2 forms a circumferential circular hub disk 13. Furthermore, the compressor wheel 2 forms an at least one delivery cell 28 which adjoins the hub disk 13 on the outside. This at least one delivery cell 28 of the compressor wheel 2 runs circumferentially around the axis of rotation 4 in the circumferential compressor chamber 30 of the housing 3. Furthermore, the cut contour of a blade 5 can be seen in FIG. 1 in the area of the delivery cell 28. This blade 5 can have a V-shaped contour. Furthermore, the respective delivery cell 28 is limited in the direction of rotation of the compressor wheel 2 by two blade blades 5, a number of blades 5 being arranged around the axis of rotation 4 on the compressor wheel 2 radially to the axis of rotation 4.
• the housing 3, in particular the upper housing part 7 and / or the lower housing part 8, has at least one circumferential side channel 19, 21 in the area of the compressor chamber 30.
• the at least one side channel 19, 21 runs in the housing 3 in the direction of the axis of rotation 4 in such a way that it runs axially to the delivery cell 28 on one side or on both sides.
• the least a side channel 19, 21 can run circumferentially around the axis of rotation 4 at least in part of the housing 3, with a breaker area 15 in the housing in the partial area in which the at least one side channel 19, 21 is not formed in the housing 3 3 is formed.
• the drive shaft 9 is supported in the housing 3 by means of at least one bearing 27, which can be roller bearings 27, in particular ball bearings 27.
• the drive 6 can be connected to the housing 3 of the side channel compressor 1, in particular to the upper housing part 7, in that the drive 6 rests with at least one end face on an end face of the housing 3 axially to the axis of rotation 4.
• the housing 3, in particular the housing lower part 8, forms a gas inlet opening 14 and a gas outlet opening 16.
• the gas inlet opening 14 and the gas outlet opening 16 are fluidically connected to one another, in particular via the at least one side channel 19, 21.
• the compression and / or the pressure and / or the flow rate of the gaseous medium in the delivery cell 28, in particular in the delivery cells 28, increases in the direction of rotation of the compressor wheel 2 of the compressor wheel 2 and in the side channels 19.
• the gaseous medium is diverted after it has passed through the gas outlet opening 16 of the side channel compressor 1 and flows out in an outflow direction, in particular in the direction of a jet pump 41 of a fuel cell system 37.
• the interruption area 15 causes a separation of a pressure side and a suction side, where the suction side is located in the area of the gas inlet opening 14 and the pressure side is located in the area of the gas outlet opening 16.
• a torque is transmitted from the drive 6 to the compressor wheel 2.
• the compressor wheel 2 is set in a rotational movement and the delivery cell 28 moves in a rotational movement around the axis of rotation 4 through the compressor chamber 30 in the housing 3 in the direction of a first direction of rotation. Since a gaseous medium already in the compression chamber 30 is moved through the delivery cell 28 and promoted and / or compressed in the process. In addition, there is a movement of the gaseous medium, in particular a flow exchange, between the delivery cell 28 and the at least one side channel 19, 21 instead.
• the side channel compressor 1 is connected to the fuel cell system 37 via the gas inlet opening 14 and the gas outlet opening 16, the gaseous medium, which is in particular an unused recirculation medium from a fuel cell, via the gas inlet opening 14 enters the compression chamber 30 of the side channel compressor 1 and / or is fed to the side channel compressor 1 and / or is sucked in from the area upstream of the gas inlet opening 14.
• the gaseous medium is discharged through the gas outlet opening 16 of the side channel compressor 1 after it has passed through.
• Fig. 2 shows a part of the side channel compressor 1 according to the invention according to a first embodiment in a perspective view, the drive 6 as a. It is shown that the drive 6 is designed as a radial internal rotor electric motor 6 and has a stator 11 and a rotor 17. The rotor 17 is at least almost completely enclosed by means of an encapsulation element 18 and thus encapsulated in particular from the environment.
• the drive 6, in particular the rotor 17, is connected via the drive shaft 9 to the compressor wheel 2, the drive shaft 9, the Ver denser wheel 2 and the rotor 17 being rotatably mounted about the axis of rotation 4 and where in each case the rotor 17 and the compressor wheel 2 is connected to the drive shaft 9 with a form fit, material fit or force fit.
• the drive shaft 9 can be supported by means of two bearings 27, which are each located on both sides of the compressor wheel 2.
• the rotor 17 has at least one permanent magnet 25 and / or the encapsulation element 18 is designed as a stainless steel cap 18 which has at least stainless steel.
• the rotor 17 is attached to the drive shaft 9 in such a way that it is flush with the side facing away from the compressor wheel 2, the stainless steel cap 18 having an opening in the area of the drive shaft 9 on its side facing the compressor wheel 2
• the stainless steel cap 18 completely encloses the rotor 17 attached to the drive shaft 9, with the exception of the area of the opening 22. Furthermore, the drive shaft 9 and the stainless steel cap 18 in the area of the opening 22 are connected to one another in a force-locking, form-locking or material-locking manner that the rotor 17, in particular the permanent magnet 25, is encapsulated in an external area.
• Fig. 3 an inventive part of the side channel compressor 1 according to a second embodiment is shown in a perspective view.
• the drive 6 is designed as an axial field electric motor 6, which has the stator 11 and the rotor 17, the stator 11 and the rotor 17 being formed in a disc-shaped manner around the axis of rotation 4 and the stator 11 in the direction of the axis of rotation 4 is arranged next to the rotor 17. Furthermore, the rotor 17 has at least the permanent magnet 25, the rotor hub 29 and a fixing disk 31, the encapsulation element 18 at least almost completely enclosing the rotor hub 29 and / or the permanent magnet 25 and thus encapsulating it to form an external area.
• the encapsulation element 18 has an at least two-layer structure, the first layer being made of an elastically deformable material, in particular an elastomer, and the second layer being made of stainless steel.
• the encapsulation element 18 can consist of at least one elastomer sealing element with a pressed-on stainless steel cap, which enables simplified assembly.
• the seal 23 (shown in Fig. 1) can be superfluous in the second embodiment, since a fluidic separation, in particular in the form of an inter mediate wall, between the space of the stator 11 and the space of the rotor 17, is formed in the housing 3.
• no drive shaft 9 is required here for torque transmission from the drive 6 to the compressor wheel 2, since in this exemplary embodiment the rotor 17 is located directly in the compressor wheel 2 as a disk-shaped element.
• inductive heating of the rotor 17 and / or the encapsulation element 18 can be brought about by energizing the stator 11, in particular the encapsulation element 18, which comprises at least stainless steel, allows rapid heating due to the material properties, in particular due to a high inductive resistance.

Applications Claiming Priority (2)

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ID=74125183

Family Applications (1)

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• 2020
  • 2020-01-10 DE DE102020200234.7A patent/DE102020200234A1/de not_active Withdrawn
  • 2020-12-16 JP JP2022542211A patent/JP2023509207A/ja not_active Withdrawn
  • 2020-12-16 EP EP20835745.9A patent/EP4088036A1/de not_active Withdrawn
  • 2020-12-16 CN CN202080092532.6A patent/CN114945752A/zh active Pending
  • 2020-12-16 WO PCT/EP2020/086432 patent/WO2021139982A1/de unknown
  • 2020-12-16 KR KR1020227027153A patent/KR20220116345A/ko unknown

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