WO2020104225A1 - Seitenkanalverdichter für ein brennstoffzellensystem zur förderung und/oder verdichtung von einem gasförmigen medium - Google Patents
Seitenkanalverdichter für ein brennstoffzellensystem zur förderung und/oder verdichtung von einem gasförmigen mediumInfo
- Publication number
- WO2020104225A1 WO2020104225A1 PCT/EP2019/080790 EP2019080790W WO2020104225A1 WO 2020104225 A1 WO2020104225 A1 WO 2020104225A1 EP 2019080790 W EP2019080790 W EP 2019080790W WO 2020104225 A1 WO2020104225 A1 WO 2020104225A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- axis
- rotation
- compressor
- side channel
- impeller
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
-
- 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
- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
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- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
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- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- 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
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- 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
- F05D2210/00—Working fluids
- F05D2210/10—Kind or type
- F05D2210/12—Kind or type gaseous, i.e. compressible
-
- 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
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
-
- 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 the promotion and / or compression of a gaseous medium, in particular hydrogen, which is particularly intended 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, particularly in vehicles with a fuel cell drive.
- the gas flows are no longer controlled discontinuously, as in the injection of liquid fuel, but the gaseous medium is removed from at least one high-pressure tank and passed to an ejector unit via an inflow line of a medium-pressure line system.
- This ejector unit leads the gaseous medium to a fuel cell via a connecting line of a low pressure line system. After the gaseous medium has flowed through the fuel cell, it is returned to the ejector unit via a return line.
- the side channel blower can be interposed, which supports the gas recirculation in terms of flow technology 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 by the vehicle battery when 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 side channel compressor has a rotating compressor wheel in a housing, which is fastened on a drive shaft and is set in rotation by a drive and is thus arranged rotatably about an axis of rotation.
- the side channel compressor has one Compressor space located in the housing, which has at least one umlau fenden side channel.
- the compressor wheel has conveyor cells arranged on its circumference in the region of the compressor chamber.
- a gas inlet opening and a gas outlet opening are each arranged in the housing and are fluidly connected to one another via the at least one side channel.
- the housing has a first and a second end face facing the compressor wheel, each of which extends radially to the axis of rotation. In these areas, an inner and an outer axial gap are formed between the housing and the compressor wheel.
- the side channel blower known from DE 10 2007 053 016 A1 can have certain disadvantages.
- the manufacturing costs of the compressor wheel can be correspondingly high.
- the high manufacturing costs are made up as follows: high raw material costs of the casting material and / or high energy costs in the production, in particular in a casting process, of the compression wheel as a casting and / or high processing costs in the reworking of the compressor wheel, for example machining and / or grinding post-processing.
- a side channel compressor is designed in such a way that a compressor wheel is constructed in several parts and has a first impeller shell and a second impeller shell, these being arranged in particular axially to one another along an axis of rotation and each being at least partially made of a plastic.
- the material costs, in particular the raw material costs, for the compressor wheel and / or the impeller shells, which at least partially or at least almost completely consist of at least one plastic, are lower than the material costs, in particular the raw material costs of the compressor wheel made of a cast material.
- the compressor wheel has at least one intermediate element in addition to the impeller shells, the intermediate element being located between the first impeller shell and the second impeller shell.
- the intermediate element may be out as a shim, the shim being at least partially made of an elastic material.
- the intermediate element is designed to be elastic so that when the width of the respective impeller shell increases, for example due to a temperature increase in the side channel compressor and the resulting thermal expansion of the respective impeller shell, it is compressed in the direction of the axis of rotation and thus reducing the width of the intermediate element.
- the overall width of the compressor wheel therefore hardly changes, or at least only slightly, since the increase in the width of the impeller shells is compensated for by an increase in temperature by reducing the elastic intermediate element.
- the advantage can be achieved that the at least one functionally relevant gap dimension does not change or at least only changes slightly, so that in particular there is no such an expansion of the functionally relevant gap dimension that at least one pneumatic encapsulation and / or separation a side channel or is lifted by a first and a second side channel.
- the reliability and / or the efficiency of the side channel blower can be increased or at least maintained, even when going through a wide temperature range.
- the compressor wheel is connected to a drive shaft by means of at least two circumferential driving flanges, the respective driving flange being non-positively connected to the drive shaft with its inner diameter radially to the axis of rotation, in particular by means of a press fit, and the respective driving flange being at least approximately axially to Axis of rotation is in contact with the respective impeller shell.
- the driver flanges are fixed on the drive shaft in such a way that they exert a prestressing force running axially to the axis of rotation on the respective impeller shell and / or the at least one intermediate element.
- the respective driver flange can have at least one fixing bore that extends at least approximately axially to the axis of rotation and into which at least one fixing pin of the respective impeller shell extends axially to the axis of rotation.
- the respective impeller shell is positively fixed in the direction of the axis of rotation by means of the respective entrainment flange and at least indirectly by means of the respective other impeller shell.
- Orthogonal to the axis of rotation the respective impeller shell is on the one hand positively fixed by means of the fixing pin protruding into the fixing bore and on the other hand additionally non-positively by means of the system on the other impeller shell.
- the connection of the compressor wheel according to the invention by means of at least two driver flanges has the advantage that the functionally relevant gap dimensions can be compensated for with at least one floating and / or loose bearing. Reliable encapsulation of the at least one side channel or the respective side channels can thus be achieved, which can improve the efficiency of the side channel compressor.
- the assembly and disassembly of the compressor wheel on the shaft is simplified by using the driver flanges and thus the assembly and maintenance costs can be reduced.
- the shim has at least two openings which run at least approximately axially to the axis of rotation, a fluid connection of the Side channels axially to the axis of rotation is produced by the respective delivery cell in the compressor wheel.
- the gaseous medium can flow at least partially in the direction of the axis of rotation from the first side channel through the delivery cell into the second side channel, but especially only when the compressor wheel is at a standstill or when the compressor wheel rotates slowly.
- the gaseous medium flowing from the respective side channel axially to the axis of rotation through the at least one opening into the delivery cell can be better displaced in the desired direction and in the desired state of a circulation flow, as a result of which the delivery effect of the side channel compressor can be improved.
- This increases the delivery pressure in the compressor chamber and the efficiency of the side channel compressor can be improved.
- the double delivery effect can be used due to the presence of two side channels, even if only one gas inlet opening and one gas outlet opening are provided, for example, only in one lower housing part and thus in one interrupter area of the first side channel.
- the gaseous medium can flow in the transition from the second side channel to the interrupter area during a rotation of the compressor wheel in the direction of the axis of rotation through the respective delivery cell and the respective openings of the shim to the gas outlet opening. So the delivery volume and / or the efficiency of the side channel compressor can be increased.
- a housing has an upper housing part and the lower housing part, the upper housing part having a cylindrical collar rotating around the axis of rotation and the lower housing part having a cylindrical projection rotating around the axis of rotation, and the collar having the extension surrounds.
- at least one gap dimension can be set between the compressor wheel and the housing by means of the adjusting disk.
- the advantage can be achieved that the lower housing part can be centered in the upper housing part, since the approach with its outer diameter is guided on the inner diameter of the upper housing part, which means that Have assembly costs reduced.
- assembly errors can be reduced, for example due to housing parts that are not optimally aligned with one another, which can reduce the probability of failure of the side channel blower.
- Either shims with different thicknesses running in the direction of the axis of rotation can be used during assembly or it can be done by machining the shim just before or during the assembly process. Reworking the upper housing part and / or the lower housing part is no longer necessary. In this way the time of the month and / or the assembly costs can be reduced.
- the intermediate element being embodied as at least one O-ring running around the axis of rotation and this enlarging at least one O-ring in egg nem Gap area of the gap is arranged.
- the inventive design of the side channel compressor with the at least one O-ring rotating around the axis of rotation prevents the hydrogen from escaping from the area of the compressor space into other areas of the side channel compressor, which in turn could lead to losses in efficiency.
- the efficiency of the fuel cell system and / or the entire vehicle can be increased by the advantageous development of the side channel poet.
- the gap radially around the axis of rotation is located axially to the axis of rotation between the impeller shells, where the intermediate element is designed as at least one tube-like ring that rotates around the axis of rotation and has a cavity in its interior, this at least one tubular ring is arranged in the enlarged gap area of the gap.
- a Federele element in particular a plate spring, is arranged in this at least one recess, the spring element axially pushing the impeller shells away from one another by means of a spring force and against the respective driving flange.
- the upper housing part and / or the lower housing part and / or the driving flanges and / or the drive shaft are at least partially made of a metallic material, the components having an at least approximately the same thermal expansion coefficient.
- a constant and at least approximately parallel to the axis of rotation duri fende pressing force can be exerted on the respective impeller shells.
- the impeller shells are pressed against the respective driving flange in such a way that the overall width of the compressor impeller hardly changes or at least changes only slightly over a wide temperature range, for example from -20 ° C to 80 ° C.
- a change in width, in particular in the direction of the axis of rotation, the respective impeller shell due to the expansion of the material from a temperature change can be compensated for by the variable width of the gap.
- the gap becomes smaller, the spring ensuring constant pressing of the respective impeller shell against the respective driving flange.
- FIG. 1 shows a schematic sectional view of a side channel compressor according to the invention and a compressor wheel according to the invention according to a first exemplary embodiment
- FIG. 2 shows a section in FIG. 1 denoted A-A and B-B of the impeller shells of the compressor wheel and the feed cells with a shim
- FIG. 3 shows the side view of the compensating disk with openings designated by C-C in FIG. 2,
- FIG. 4 shows a schematic sectional view of the compression terrace according to the invention in accordance with a second exemplary embodiment
- FIG. 5 shows a section in FIG. 4 labeled A-A and B-B of the impeller shells of the compressor wheel and the feed cells without the equalizing disk
- FIG. 6 shows a schematic sectional view of the compression wheel according to the invention in accordance with a third exemplary embodiment
- Figure 7 is a schematic sectional view of the compression wheel according to the invention according to a fourth embodiment. Description of the embodiment
- FIG. 1 shows a schematic sectional view of a side channel compressor 1 according to the invention and a compressor wheel 2 according to the invention in accordance with a first exemplary embodiment.
- the side channel compressor 1 has the compressor wheel 2, which is rotatably mounted about a ho rizontal axis of rotation 4 in a housing 3. Since serves as a drive 6, in particular an electric drive 6, as a rotary drive 6 of the compressor wheel 2 and a transmission of the torque and / or the rotary movement takes place from the drive 6 via a drive shaft 9 at least medium bar to the compressor wheel 2.
- the compressor wheel 2 is formed in several parts according to the first embodiment and has a first impeller shell 10 and a second impeller shell 12, these being arranged in particular axially to the axis of rotation 4 next to each other and a radially rotating around the axis of rotation 4 gap 52 axially to the axis of rotation 4 between the impeller shells 10, 12 is located.
- the impeller shells 10, 12 can each be at least partially made of a plastic.
- the compressor wheel 2 in addition to the impeller shells 10, 12 has at least one intermediate element 13, 25, 57, the intermediate element 13, 25, 57 being in the gap 52 between the first impeller shell 10 and the second impeller shell 12.
- the compressor wheel 2 is connected to the drive shaft 9 by means of at least two circumferential driver flanges 22, 24, the respective drive flange 22, 24 with its inner diameter radially to the axis of rotation 4 being positively connected, in particular by means of a press fit, to the drive shaft 9 and wherein the respective driving flange 22, 24 is at least approximately axially to the axis of rotation 4 with the respective impeller shell 10, 12 in contact.
- the driver flanges 22, 24 are fi fixed on the drive shaft 9 that each exert an axially extending to the axis of rotation 4 biasing force on the respective impeller shell 10, 12 and / or the at least one intermediate element 13, 25, 57.
- the respective driver flange 22, 24 also has at least one fixing bore 20a, b, c, d which extends at least approximately axially to the axis of rotation 4 and into which at least one fixing pin 18a, b, c, d of the respective impeller shell extends axially to the axis of rotation 4 10, 12 protrudes.
- the intermediate element 13 shown in FIG. 1 according to the first embodiment is designed as a shim 13, the Shim 13 is at least partially made of an elastic material ago.
- the elastic material can be, for example, a layered composite of at least one elastomer and / or another material, for example steel and / or plastic.
- the housing 3 has a first circumferential side channel 19 and / or a second circumferential side channel 21 in the region of a compressor chamber 30.
- a plurality of feed cells 5 runs circumferentially around the axis of rotation 4 in the almost completely rotating around the axis of rotation 4 Ver compressor chamber 30 of the housing 3 in the compressor wheel 2.
- the side channels 19, 21 extend in the housing 3 in the direction of the axis of rotation 4 that these run axially to the feed cell 5 on both sides.
- the side channels 19, 21 can run circumferentially about the axis of rotation 4 at least in a partial area of the housing 3, an interrupter area 15 being formed in the housing 3 in the partial area in which the side channels 19, 21 are not formed in the housing 3 is.
- the drive shaft 9 is connected at least cardanically to the drive 6 at one end axially to the axis of rotation 4.
- the bearings 27, 47 can be Rolling bearings 27, 47 act, in particular ball bearings 27, 47.
- the housing 3 forms a gas inlet opening 14 and a gas outlet opening 16.
- the gas inlet opening 14 and the gas outlet opening 16 are fluidly connected to one another, in particular via the at least one side channel 19, 21.
- the compressor wheel 2 is set in rotary motion and the at least one feed cell 28 moves in a rotary motion around the axis of rotation 4 through the compressor chamber 30 in the housing 3
- Compressor chamber 30 located gaseous medium moved along by the feed cell 28 and thereby conveyed and / or compressed.
- gaseous medium in particular a flow exchange
- the Ge housing 3 has radially to the axis of rotation 4 each have a first and second end face 32, 34, each of which faces the compressor wheel 2.
- a first and a second functionally relevant gap dimension 36, 38 are formed between the housing 3 and the compressor wheel 2 in the area of the gap surfaces, which are located in particular between the respective end faces 32, 34.
- the functionally relevant gap dimensions 36, 38 it is achieved that the side channels 19, 21 are encapsulated and thus pneumatically separated from one another. Since the compressor wheel 2 and the housing 3, in particular an upper housing part 7 and / or a lower housing part 8, form a respective functionally relevant gap dimension 36, 38, which is so small that the gaseous medium has the respective gap dimension 36, 38 cannot happen and / or cannot flow past. Since the mentioned surface pairings 32, 34 generally have as little play as possible with one another.
- the gaseous medium which is in particular an unused recirculation medium from a fuel cell system 37, flows via the gas inlet opening 14 into the compression space 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 after it has passed through the gas outlet opening 16 of the side channel compressor 1 and flows back into the fuel cell system 37.
- an axis of symmetry 48 is shown, which is orthogonal to the axis of rotation 4 and symmetrically centered through the cutting geometry of the compressor wheel 2 runs.
- first impeller shell 10 with a third end face 40 and / or the second impeller shell 12 with a fourth end face 42 each with a fifth end face 44 of the first driver flange 22 and / or with a sixth end face 46 of the second driver flange 24 is in contact, in particular almost axially to the axis of rotation 4.
- the shim 13 located between the impeller shells 10, 12 has, for example, a seventh end face 54 and a ninth end face 58 of the first impeller shell 10 and / or, for example, an eighth end face 56 and a tenth end face 60 of the second Impeller shell 12 is in contact, in particular almost axially to the axis of rotation 4.
- the biasing force acting axially to the axis of rotation 4 acts over the surfaces 40, 42, 44, 46, 54, 56, 58, 60 on the respective components 10, 12, 13, 22, 24 and ensures a stable assembly of the compressor wheel 2, with high torques on the part of the drive 6 on the compressor wheel 2 transferred.
- Fig. 1 it is also shown that the upper housing part 7 has a cylindrical collar 23 rotating around the axis of rotation 4 and the lower housing part 8 has a cylindrical extension 26 rotating around the axis of rotation 4, the cylindrical extension 26 with its Axis of rotation 4 facing away from the surface of the inner axis of the cylindrical collar 23 facing the axis of rotation 4.
- a compensation gap 43 running radially to the axis of rotation 4 is located axially to the axis of rotation 4 between a front surface of the shoulder 26 of the lower housing part 8 and a front surface of the upper housing part 7.
- the upper housing part 7 and / or the lower housing part 8 and / or the driving flanges 22, 24 and / or the drive shaft 9 are at least partially made of a metallic material, the components having an at least approximately the same thermal expansion coefficient. Since the metallic material can be aluminum and / or steel and / or a metallic alloy.
- housing upper part 7 and / or lower housing part 8 and / or the driving flanges 22, 24 and / or the drive shaft 9 made of a, in particular metallic, material with an at least approximately the same thermal expansion coefficient, these components will move in the direction expand the axis of rotation 4 at least almost as much when the temperature increases and contract at least almost as much when the temperature decreases. Since the compressor wheel 2 and in particular the impeller shells 10, 12 are at least partially made of a plastic, these have a different coefficient of thermal expansion.
- the width of the impeller shells 10, 12 changes differently when the temperature changes compared to the components housing upper part 7 and / or the housing lower part 8 and / or the driving flanges 22, 24 and / or the Drive shaft 9.
- This could lead to such a widening of the respective functionally relevant gap dimension 36, 38, as a result of which the encapsulation and thus fluid and / or pneumatic separation of the side channels 19, 21 from one another would no longer be guaranteed.
- the respective functionally relevant gap dimension 36, 38 could become so small that the compressor wheel 2 and the housing 3 come into contact with one another Components are damaged thereby and / or the compressor wheel 2 in the housing 3 Ge blocked and thus the side channel compressor 1 would no longer be functional.
- the drive 6 has a rotor 17 running axially to the axis of rotation 4, the rotor 17 being connected to the drive shaft 9 in a force-locking and / or positive manner, in particular by means of a press fit. Encapsulation of the rotor 17 ensures that no hydrogen can get from the side channel compressor into the environment, which can lead to a reaction with oxygen and a detonating gas effect, which in turn could damage the side channel compressor and / or other components of the entire vehicle.
- the drive 6 has a stator 11 rotating around the axis of rotation 4, the stator 11 being located outside around the rotor 17 and / or the rotor 17 being located within the inner diameter of the stator 11.
- the rotor 17 By energizing the stator 11, the rotor 17 can be driven and in particular be moved in a Rotationsbe movement. Encapsulation of the stator 11 against environmental influences and / or against moisture and pollution from the outside is achieved by using a stator housing 39.
- the rotor housing 41 and / or the stator housing 39 can be fixed to the housing 3 of the side channel compressor 1, in particular screwed to the housing.
- Fig. 2 shows a in Fig. 1 denoted by AA and BB section of the impeller shells 10, 12 of the compressor wheel 2 and the feed cells 5 with the compensating disc 13.
- the axis of symmetry 48 is shown in Fig. 2, the radial to the axis of rotation 4th and runs through the impeller 2.
- the radially around the axis of rotation 4 circumferential gap 52 axially to the axis of rotation 4 and at the level of the symmetry axis 48 and at least approximately parallel to this between the race wheel shells 10, 12.
- the shim 13 is arranged in this gap 52 and fills it at least almost completely.
- a feed cell 5 is formed between two blades 55.
- the symmetry of the V-shaped shape of the blades 55 is mirrored symmetrically by the axis of symmetry 48.
- a respective end face of the blades 55 presses the gaseous medium, in particular hydrogen, located in the delivery cell 28 in a direction of rotation from the area of the gas inlet opening 14 to the area of the gas outlet opening 16, with acceleration and / or compression of the gaseous medium taking place.
- the gaseous medium turns in the direction of rotation pressed out of the conveyor cell 28 away from the axis of symmetry 48 in the respective side channel 19, 21, the gaseous medium being displaced into the circulation flow 50 and the gaseous medium flowing out of the conveyor cell 28 at a speed in the respective side channel 19, 21 onto one slower flowing gaseous medium hits.
- This side channel flow of the medium flows more slowly than the feed cell flow of the medium - a force from the medium in the feed cell 28 to the medium in the side channel 19, 21 resulting from the resulting centrifugal force difference. Since there is an exchange of impulses between the two media and energy is transferred by impulse exchange to a conveying stream through the gaseous medium put into circulation flow 50, this being in particular the stationary gaseous medium located in the respective side channel 19, 21.
- the inventive design of the side channel compressor 1 with the at least one side channel 19, 21 is also advantageous that in the event of an out of the side channel compressor 1, the gaseous medium can continue to flow through the at least one side channel 19, 21, even if the compressor wheel 2 is stationary and there is therefore no risk that the delivery by the fuel cell system 37 will completely stop due to the failed side channel compressor 1.
- This is particularly the case if a high pressure and a high delivery rate of the medium to be delivered are maintained in the fuel cell system 37, in particular by a further component of the fuel cell system 37.
- FIG. 3 shows, in FIG. 2, a side view, designated CC, of the shim 13 with at least two openings 53.
- the shim 13 has an inner contour 49 which runs in a ring around the axis of rotation 4.
- the shim 13 has an outer contour 51 which runs in a ring around the axis of rotation 4 and has a larger diameter than the inner contour 49.
- the inner contour 49 is connected by means of at least two connecting ribs 62 to the outer contour 51, the connecting ribs 62 running at least almost radially to the axis of rotation 4.
- the arrangement of the connecting ribs 62 is circumferential about the axis of rotation 4 between the inner contour 49 and the outer contour 51.
- the shim 13 forms a plurality of openings 53. Since are in the direction of the axis of rotation 4 end faces 54, 56 of the connecting ribs 62 in contact with the ver in the direction of the axis of rotation 4 end faces 58, 60 of the blades 55 of the respective impeller shell 10, 12th
- FIG. 4 shows a schematic sectional view of the compressor wheel 2 according to the invention in accordance with a second exemplary embodiment.
- the intermediate element 25 is designed as at least one circumferential axis of rotation 4 and the O-ring 25 at least one O-ring 25 is arranged in a ver enlarged gap area 28 of the gap 52.
- the enlarged gap area 28 is achieved by enlarging the gap 52 in the impeller shells 10, 12. In this way, a possible leakage current that runs orthogonally to the axis of rotation 4 and between the two impeller shells 10, 12 can be prevented. This offers the advantage that no flow losses can be set in the compressor chamber 30 and the efficiency of the side channel compressor 1 can thus be increased.
- An outer O-ring 25a and an inner O-ring 25b can each be located in the enlarged gap area 28 between the impeller shells 10, 12, with the use of the two O-rings 25a, b providing an effective pneumatic and / or hydraulic separation of the side channels 19, 21 can be achieved.
- the O-rings 25a, b are designed such that they can be pressed together and elastically widen back into the original shape. In this way, the total width 45 of the compressor wheel 2 can pass through different temperature ranges. be adapted in such a way that the functionally relevant gap dimensions 36, 38 remain constant or at least almost do not change, regardless of the temperature and / or the different coefficients of thermal expansion of the further components of the side channel compressor 1.
- Fig. 5 shows a in Fig. 4 denoted by AA and BB section of the impeller shells 10, 12 of the compressor wheel 2 and the feed cells 5 without the corresponding shim 13.
- the gap 52 between the respective impeller shells 10 is in the sectional plane shown , 12 wherein the gap 52 extends at least parallel to the axis of symmetry 48.
- the distance between the impeller shells 10, 12 is kept by means of the at least one O-ring 25 not visible in this plane.
- the respective impeller shell 10, 12 are pressed against each other at least approximately parallel to the axis of rotation 4 by means of the respective driving flange 22, 24 and come at least indirectly into contact with one another via the at least one O-ring 25, but the gap 52 and / or the enlarged gap area 28 forms between the driver flanges 22, 24 (shown in FIG. 4).
- Fig. 6 shows a schematic sectional view of the compression wheel according to the invention according to a third embodiment.
- the gap 52 which runs radially around the axis of rotation 4, is located axially to the axis of rotation 4 between the impeller shells 10, 12, the intermediate element 57 being designed as at least one hose-like ring 57 which runs around the axis of rotation 4 and has a cavity 59 in its interior , wherein this is arranged at least one hose-like ring 57 in the enlarged gap region 28 of the gap 52.
- FIG. 7 shows a schematic sectional view of the compressor wheel 2 according to the invention in accordance with a fourth exemplary embodiment. It is located in each case a recess 31 axially to the axis of rotation 4 between the impeller shells 10, 12, wherein a spring element 35, in particular a plate spring 35, at least one recess 31 is arranged in this. This at least one recess 31 is at least partially formed circumferentially about the axis of rotation 4 in each of the two impeller shells 10, 12, the respective recess 31 in
- Direction of the axis of symmetry 48 can be arranged offset in the first impeller shell 10 in relation to the second impeller shell 12.
- the spring element 35 can be guided in the compressor wheel 2.
- the spring element 35 presses the impeller shells 10, 12 axially away from each other by means of a spring force and against the respective driver flange 22, 24.
- a further spring force can be applied to the impeller shells 10 , 12 act.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Fuel Cell (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201980076829.0A CN113167284A (zh) | 2018-11-22 | 2019-11-11 | 用于燃料电池系统的输送和/或压缩气态介质的侧通道压缩机 |
KR1020217018834A KR20210093989A (ko) | 2018-11-22 | 2019-11-11 | 가스상 매체를 이송 및/또는 압축하기 위한 연료 전지 시스템용 사이드 채널 컴프레서 |
JP2021525828A JP7122470B2 (ja) | 2018-11-22 | 2019-11-11 | 気体状の媒体を圧送および/または圧縮するための燃料電池システムのためのサイドチャネル圧縮機 |
US17/296,323 US11644037B2 (en) | 2018-11-22 | 2019-11-11 | Side-channel compressor for a fuel cell system for conveying and/or compressing a gaseous medium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018219995.7 | 2018-11-22 | ||
DE102018219995.7A DE102018219995A1 (de) | 2018-11-22 | 2018-11-22 | Seitenkanalverdichter für ein Brennstoffzellensystem zur Förderung und/oder Verdichtung von einem gasförmigen Medium |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020104225A1 true WO2020104225A1 (de) | 2020-05-28 |
Family
ID=68536853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2019/080790 WO2020104225A1 (de) | 2018-11-22 | 2019-11-11 | Seitenkanalverdichter für ein brennstoffzellensystem zur förderung und/oder verdichtung von einem gasförmigen medium |
Country Status (6)
Country | Link |
---|---|
US (1) | US11644037B2 (de) |
JP (1) | JP7122470B2 (de) |
KR (1) | KR20210093989A (de) |
CN (1) | CN113167284A (de) |
DE (1) | DE102018219995A1 (de) |
WO (1) | WO2020104225A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115263774A (zh) * | 2022-06-24 | 2022-11-01 | 烟台东德实业有限公司 | 一种转子分体式旋涡型氢气循环泵 |
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- 2019-11-11 CN CN201980076829.0A patent/CN113167284A/zh active Pending
- 2019-11-11 US US17/296,323 patent/US11644037B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
JP2022507327A (ja) | 2022-01-18 |
US20220049704A1 (en) | 2022-02-17 |
JP7122470B2 (ja) | 2022-08-19 |
US11644037B2 (en) | 2023-05-09 |
KR20210093989A (ko) | 2021-07-28 |
DE102018219995A1 (de) | 2020-05-28 |
CN113167284A (zh) | 2021-07-23 |
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