WO2021121798A1 - Compresseur à canal latéral pour un système de pile à combustible permettant de transporter et/ou de comprimer un gaz - Google Patents

Compresseur à canal latéral pour un système de pile à combustible permettant de transporter et/ou de comprimer un gaz Download PDF

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Publication number
WO2021121798A1
WO2021121798A1 PCT/EP2020/081873 EP2020081873W WO2021121798A1 WO 2021121798 A1 WO2021121798 A1 WO 2021121798A1 EP 2020081873 W EP2020081873 W EP 2020081873W WO 2021121798 A1 WO2021121798 A1 WO 2021121798A1
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WO
WIPO (PCT)
Prior art keywords
compressor
side channel
ring magnet
housing
rotation
Prior art date
Application number
PCT/EP2020/081873
Other languages
German (de)
English (en)
Inventor
Armin Merz
Alexander Hero
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2021121798A1 publication Critical patent/WO2021121798A1/fr

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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
    • F04D25/026—Units comprising pumps and their driving means with a magnetic coupling
    • 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/059—Roller bearings
    • 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
    • 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
    • F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
    • 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 gas, 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 in the case of 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 the 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 is known in which a gaseous medium, in particular hydrogen, is conveyed and / or compressed.
  • the side channel compressor has a housing and a drive, the housing having an upper housing part and a lower housing part.
  • a compressor chamber running around an axis of rotation is arranged in the housing and has at least one circumferential side channel.
  • the housing there is 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 102007046014 A1 each has a gas inlet opening formed on the housing and a gas outlet opening which are fluidly connected to one another via the compressor chamber, in particular the at least one side channel.
  • the side channel compressor has the drive, which has a stator which runs in the form of a sleeve around the axis of rotation, and in the interior of which a rotor arranged on a rotor shaft is arranged.
  • the side channel compressor known from DE 102007 046014 A1 can have certain disadvantages.
  • the drive is directly connected to the compressor wheel by means of a shaft.
  • this can result in a direct transmission to the compressor wheel.
  • the compressor wheel can be damaged, in particular due to a collision with the housing and / or at least one bearing of the compressor wheel.
  • the direct connection of the compressor wheel by means of a shaft, in particular a drive shaft, with the drive can have the disadvantage that shock loads in the form of axial and / or radial forces or shock loads from the operation of the side channel compressor in the area of the compressor room directly from the Compressor wheel are transmitted to the drive via the drive shaft, which can damage the drive, in particular the electrical components and / or any copper windings that may be present.
  • the side channel compressor known from DE 102007046014 A1 has the disadvantage that due to the continuous drive shaft, in particular from the area of the drive into the area of the housing and / or of the compressor wheel, in the direction of the axis of rotation, an encapsulation of the compressor chamber and / or the gas-carrying area of the electrical components, in particular the electrical components of the drive, cannot be completely and sustainably guaranteed.
  • the labyrinth seal described in DE 10 2007 046 014 A1 leaks can occur due to the existing gap, especially when the impeller moves relative to the axis of rotation.
  • the labyrinth seal can be damaged in Axialbewe conditions and / or radial movement of the impeller and / or the drive shaft causing leakage and / or failure of the entire side channel compressor.
  • a side channel compressor for a fuel cell system for conveying and / or compressing a gaseous medium, in particular hydrogen.
  • a side channel compressor which has a magnetic coupling, in particular an integrated magnetic coupling, wherein a torque can be transmitted, in particular indirectly, from a drive to a compressor wheel by means of the magnetic coupling.
  • a torque can be transmitted, in particular indirectly, from a drive to a compressor wheel by means of the magnetic coupling.
  • the compressor wheel and the drive are no longer directly mechanically connected, as a result of which a transmission of forces from the drive to the compressor wheel is prevented.
  • These damaging forces can be torque fluctuations and / or resulting forces running axially to an axis of rotation, which can result in particular when the drive is stopped or the drive is braked when the drive is moving quickly. Damage to the compressor wheel and / or that of a housing and / or the entire side channel compressor can thus be prevented in this way.
  • the magnetic coupling can be used to prevent axial forces and / or radial forces and / or shock loads and / or torque peaks from the operation of the side channel compressor in the area of the compressor chamber from being transmitted directly from the compressor wheel via a drive shaft to the drive, whereby the drive can be damaged, especially Special the electrical components and / or any copper windings that may be present.
  • the inventive design of the side channel compressor according to claim 1 has the advantage that, due to the magnetic coupling, the compressor wheel starts up more gently, in particular during a cold start, and / or the compressor wheel is braked during Operation can be achieved because the magnetic coupling can compensate for torque peaks that come from the drive.
  • the magnetic coupling of the side duct compressor has at least the components of the first ring magnet and / or the second ring magnet, with the first ring magnet in particular being connected to a hub in a materially, form-fitting or force-fitting manner and the second ring magnet being designed as a magnetic coupling half.
  • the magnetic coupling has a low complexity, thus few components are required and thus the overall costs of the magnetic coupling can be kept low.
  • the magnetic coupling also works in the event of a power failure, which can reduce the likelihood of failure of the side channel blower. Neither does it require any direct contact between the friction partner and / or contact partner, whereby the advantage of at least virtually wear-free operation of the clutch can be achieved. This leads to a higher reliability of the fuel cell system and / or the vehicle.
  • the first ring magnet and / or the second ring magnet run disc-shaped around the axis of rotation, the first ring magnet being arranged in the direction of the axis of rotation next to the second ring magnet.
  • the magnetic coupling can be implemented as a narrow component in the direction of the axis of rotation, which due to its diameter requires a lot of installation space radially to the axis of rotation, but is designed to be narrow axially to the axis of rotation and thus requires little installation space axially to the axis of rotation.
  • the other components of the side channel compressor, in particular the housing and the compressor wheel are also designed to be narrow axially to the axis of rotation.
  • the Ge housing and the compressor wheel require a lot of installation space due to its diameter radial to the axis of rotation, but little installation space is required axially to the axis of rotation.
  • the compact and space-saving design of the side channel blower is achieved through the smallest possible surface area in relation to the volume. This offers the advantage that only a small amount of installation space is required by the customer, for example in a vehicle. Furthermore, the compact design of the side channel blower, in particular with the smallest possible surface area in relation to the volume, 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 first ring magnet and / or the second ring magnet are arranged concentrically rotatable about the axis of rotation, with at least one air gap circumferential in the shape of a disk around the axis of rotation between the first ring magnet and the second ring magnet.
  • the advantage can be achieved that a compact design of the magnetic coupling and / or the side channel compressor can be achieved by means of the arrangement of the disc-shaped air gap around the axis of rotation between the first ring magnet and the second ring magnet.
  • this arrangement of the air gap, the first ring magnet and / or the second ring magnet offers the advantage of quick assembly and disassembly of the magnetic coupling and the side channel compressor in the direction of the axis of rotation, whereby the assembly costs can be reduced and the maintenance costs that occur can be reduced.
  • the drive has at least one rotor and / or a stator, in particular with at least one copper winding, the stator being energized in such a way and / or such a magnetic field that inductive heating of the rotor and / or a drive housing and / or other components is effected.
  • these components can in particular be the second ring magnet.
  • the rotor can be connected to the drive shaft, in particular positively and / or cohesively and / or non-positively.
  • the advantage can be achieved that a transfer of heat energy from the stator to the Rotor and / or the drive housing and / or the second ring magnet and thus the compressor wheel takes place.
  • the advantage can be achieved in this way that, when the rotating field is not present, the rotor and / or the drive housing and / or the second ring magnet is heated by energizing the stator, the effect of induction being used in particular for this purpose.
  • the aforementioned components which can in particular consist of a thermally conductive material, can be heated, which is particularly advantageous in the case of a cold start procedure of the side channel compressor and / or the vehicle.
  • the second Ringmag net heats up and transfers, for example due to its thermal conductivity, the heat meenergy to the compressor wheel without being in direct or indirect connection with the stator.
  • the heat energy transfer takes place in one direction of flow in the area between the compressor wheel and the housing in which ice bridges have formed.
  • These ice bridges arise due to an existing liquid, in particular water, which forms during the operation of the fuel cell system and which, in particular, accumulates in the area with a small gap between the compressor wheel and the housing.
  • the liquid freezes and ice bridges are formed.
  • these ice bridges can damage the side channel compressor and / or prevent rotation of the compressor wheel in the housing by blocking.
  • the compressor wheel starts up it can break away, releasing sharp-edged pieces of ice that 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. As the rotor heats up, the compressor wheel is warmed up.
  • the ice bridges melt and the liquid changes from a solid to a liquid aggregate state and can be discharged, for example by means of a purge valve and / or drain valve present in the fuel cell system.
  • Inductive heating of the drive housing also leads to a melting of the ice bridges between the compressor wheel and the housing, since the thermal energy is transferred from the drive housing to an upper housing part and from there to a lower housing part. In this way, the service life of the side channel compressor and / or of the fuel cell system can be increased.
  • a disc-shaped plastic cover running around the axis of rotation and / or at least partially sleeve-shaped around the axis of rotation which is in particular a cup-shaped sealing element, is located axially to the axis of rotation between the first ring magnet and the second ring magnet and / or at least partially encloses one of the ring magnets on the side facing away from the axis of rotation and wherein the plastic cover encapsulates the electrical components of the side channel compressor, in particular the drive, from the medium of the compressor room, in particular hydrogen.
  • the advantage can be achieved that the area of the stator which has electrical lines and coils and which is therefore particularly susceptible to the ingress of moisture and / or gases, such as hydrogen, can be encapsulated.
  • the encapsulation takes place through the use of the plastic cover in such a way that the plastic cover forms such a barrier so that the gaseous medium containing, for example, hydrogen and / or water in the area of the compressor chamber and / or an outer region and / or an inner region of the Housing cannot penetrate into the area within the drive housing in which the electronic and / or electrical components of the drive are located.
  • a large part of its surface of the plastic cover is in such a position with the housing, in particular the upper part of the housing, in particular radially to the axis of rotation, that a large contact surface is formed, with the plastic cover in particular pressing against the surface of the housing with a force, whereby an improved encapsulation can be achieved, since the moisture would have to overcome a relatively long penetration path between the plastic cover and the housing.
  • the force which is in particular a sealing force, is achieved in such a way that the surface of the plastic cover formed ra dial to the axis of rotation forms a slightly enlarged outer diameter in relation to the inner diameter of the housing in the contact area.
  • the sealing element is made of an elastic material, and the plastic cover is compressed radially towards the axis of rotation during assembly in the area of the housing, the plastic cover returning to its original shape after the installation moves back the elasticity and thereby presses and / or comes into contact with a pressing force and / or clamping force against the surface of the housing, in particular against an inner diameter of the housing.
  • An additional measure to improve the invention is the use of a further sealing element, in particular an O-ring, which is embedded in an external groove in the plastic cover and achieves a sealing effect between the upper part of the housing and the plastic cover.
  • the probability of failure of the drive and / or the side channel compressor can be reduced by damage to the sealing element prior to installation. Furthermore, in this way the advantage can be achieved that the drive can be replaced more simply, cheaply and quickly.
  • These components can be located completely in the encapsulated area within the drive housing, whereby this modular assembly can be completely dismantled and removed from the side duct compressor in the direction of the axis of rotation.
  • the second ring magnet is arranged next to the compressor wheel and / or inside the compressor wheel, in particular on a mounting flange of the compressor wheel, the second ring magnet, at least indirectly via the mounting flange, non-positively and / or positively and / or cohesively is connected to the compressor wheel.
  • the receiving flange can in particular run in an L-shaped stepped manner.
  • the lower housing part has a cylindrical bearing journal, the compressor wheel being mounted on the journal by means of a first bearing and / or a second bearing, each of which is designed as a deep groove ball bearing.
  • the advantage can be achieved, in particular by means of the use of the magnetic coupling according to the invention, that the continuous drive shaft on which the two components rotor and compressor are located wheel located, for transmitting a rotational movement and a torque from the drive to the compressor wheel is no longer required.
  • the compressor wheel is therefore independent of the drive shaft on which the rotor is located, so that axial force and / or radial forces occurring in the drive shaft and / or in the rotor are no longer transmitted to the compressor wheel and thus with tilting or wobbling of the compressor wheel is prevented, while a rotational movement of the compressor wheel is almost unrestricted.
  • the failure probability of the side channel compressor and thus the entire fuel cell system can be reduced and, on the other hand, the assembly costs can be reduced, since such a complex component, the drive shaft, including the rotor and compressor wheel, no longer has to be assembled and aligned.
  • the drive shaft is supported by means of a third bearing and a fourth bearing, at least one bearing being located in a cup-shaped stepped section of the drive housing and / or at least one bearing being located in a cylindrical shoulder of a cover.
  • the drive shaft, especially with the Ro tor, and the third and fourth bearings can be assembled and disassembled with little expenditure of time, since only the cover in the direction of the axis of rotation has to be removed and / or dismantled in order to dismantle all of the aforementioned components can. In this way, the assembly costs and the repair costs of the side channel blower can be reduced.
  • the first ring magnet and / or the second ring magnet have at least partially a hard ferrite and / or ceramic material.
  • the resistance of the magnetic coupling to abrasive particles and damage can be increased and the service life of the side channel compressor can be increased.
  • the efficiency and responsiveness of the magnetic coupling can be improved in this way and the risk of the coupling slipping can be reduced.
  • Figure 1 is a schematic sectional view of a side channel compressor according to the invention according to a first embodiment
  • FIG. 2 shows a section of the side channel compressor, denoted by A-A in FIG. 1, in an enlarged view
  • the side channel compressor 1 can be a side channel compressor 1 for a fuel cell system 43 for conveying and / or compressing a gas, in particular hydrogen.
  • the side channel compressor 1 has a housing 3 and a drive 6.
  • the sokanalver denser 1 has a compressor wheel 2, which is designed in particular as a closed disk-like compressor wheel 2 and is rotatably mounted in the housing 3 about the horizontal axis of rotation 4.
  • the drive 6, which is designed in particular as an electric drive 6, serves at least indirectly as a rotary drive 6 of the compressor wheel 2.
  • the drive 6 is designed in particular as a radial internal rotor electric motor 6, which has a stator 12 and a rotor 10.
  • the housing 3 has an upper housing part 7 and a lower housing part 8 and a compressor chamber 30 running around the axis of rotation 4 in the housing 3 and having at least one circumferential side channel 19.
  • the compressor wheel 2 has impeller blades 5 arranged on its circumference.
  • the side channel compressor 1 in turn is connected to the fuel cell system 43 by means of the gas inlet opening 14 and the gas outlet opening 16.
  • At least one sealing element in particular a sealing element rotating around the axis of rotation 4, can be arranged between the upper housing part 7 and the lower housing part 8 in order to improve encapsulation against the penetration of moisture and / or contamination from the outside cause.
  • an improved encapsulation against the loss of the medium to be conveyed is achieved in order to prevent the medium to be conveyed from escaping to the environment.
  • the stator 12 can have cooling channels, in particular cooling channels running in the direction of the axis of rotation 4, in order to reduce heating of the stator 12 during operation, in particular when operating at a high speed of the compressor wheel 2 and / or an operating state of the stator 12, in which it produces a high level of power loss and heat loss.
  • the stator 12 can also have a magnet and / or the magnetic components, in particular a permanent magnet.
  • FIG. 1 shows that the side channel compressor 1 has a magnetic coupling 42, in particular an integrated magnetic coupling 42, wherein a torque, in particular indirectly, can be transmitted from the drive 6 to the compressor wheel 2 by means of the magnetic coupling 42.
  • a decoupling of the direct power transmission in particular the torque from the drive to the compressor wheel 2 is possible in such a way that a continuous shaft 22, in particular a drive shaft 22, on which the elements rotor 10 of the drive 6 and the compressor wheel 2 are applied are, in particular non-positively, positively or cohesively connected to this, can be ent.
  • the magnetic coupling 42 has the components of the first ring magnet 21 and / or the second ring magnet 23, in particular the first ring magnet 21 is connected to a hub 13 in a materially, form-fitting or force-fitting manner and the second ring magnet 23 is implemented as a magnetic coupling half 23.
  • the first ring magnet 21 and / or the second ring magnet 23 run in the form of a disk around the axis of rotation 4, the first ring magnet 21 being net in the direction of the axis of rotation 4 next to the second ring magnet 23.
  • the respective ring magnet 21, 23 each has at least one magnetic south pole and one magnetic north pole, so that the torque by means of at least one magnetic attraction force and / or a magnetic repulsion force from the first ring magnet 21 takes place on the second ring magnet 23 or vice versa, depending on whether the compressor wheel 2 is accelerated or braked, in particular by the drive 6, since the ring magnets 21, 23 are arranged on a circular path around the axis of rotation 4.
  • the hub 13 is for example connected to the drive shaft 22 by means of a press fit or a first screw connection 38.
  • the first ring magnet 21 and / or the second ring magnet 23 are arranged concentrically rotatable around the axis of rotation 4, with at least one air gap 9 encircling the axis of rotation 4 in the form of a disk axially to the axis of rotation 4 between the first ring magnet 21 and the second ring magnet 23 is located.
  • this air gap 9 there is an at least partially disk-shaped circumferential around the axis of rotation 4 and / or at least partially sleeve-shaped around the axis of rotation 4.
  • This plastic cover 18, which is in particular a cup-shaped sealing element 18, is located axially to Axis of rotation 4 between the first ring magnet 21 and the second ring magnet 23 is located.
  • the plastic cover 18 can at least partially enclose at least one of the ring magnets 21, 23 on the side facing away from the axis of rotation 4.
  • the plastic cover 18 thereby encapsulates the electrical components of the side channel compressor 1, in particular the drive 6, from the medium of the compressor chamber 30, in particular hydrogen.
  • the second ring magnet 23 is connected to an L-shaped and / or stepped receiving flange 25 on its end face, in particular non-positively and / or positively and / or cohesively.
  • This receiving flange 25 is connected with at least one outer diameter and / or one end face to the compressor wheel 2, in particular with a force fit and / or form fit and / or material fit.
  • the second ring magnet 23 is arranged next to the compressor wheel 2 and / or inside the compressor wheel 2, in particular on the receiving flange 25 of the compressor wheel 2 Ring magnet 23, transmitted torque, are transmitted from the second ring magnet 23 via the mounting flange 25 to the compressor wheel 2, whereby a rotation of the compressor wheel 2 is effected and, by means of a control of the drive 6, an acceleration or a braking of the rotational speed of the compressor wheel 2 be is effective.
  • the first ring magnet 21 and / or the second ring magnet 23 can at least partially have a hard ferrite and / or a ceramic material.
  • the compressor wheel 2 forms a delivery cell 28 in the area between an inner limiting ring 17 and an outer limiting ring 11, which run circumferentially around the axis of rotation 4.
  • This delivery cell 28 of the Ver denser wheel 2 runs circumferentially around the axis of rotation 4 in the circumferential Ver denser space 30 of the housing 3, the compressor wheel 2 and / or the delivery cell 28 on the respective outer circumference of the circumferential outer Be limiting ring 11, in particular the outer one Limiting ring 11 limits the delivery cell 28 at its outer diameter surrounding the axis of rotation 4.
  • the compressor wheel 2 has the inner limiting ring 17 rotating around the axis of rotation 4, the inner limiting ring 17 being formed on the inner diameter of the rotating compressor chamber 30 on the compressor wheel 2 and a separation and / or encapsulation of the compressor chamber 30 from an inner region 32 of the side channel compressor 1 causes.
  • the outer limiting ring 11 causes a separation and / or encapsulation of the compressor chamber 30 from an outer region 34 of the side channel compressor 1.
  • the compressor wheel 2 also forms to accelerate and / or compress the medium to be conveyed, such as hydrogen, revolving around the Axis of rotation 4, in particular in the area between the inner limiting ring 17 and the outer limiting ring 11, the blades 5 from.
  • the compressor wheel 2 forms the delivery cells 28 in the area of the compressor chamber 30 between two adjacent blades 5, which are delimited radially to the axis of rotation 4 inwardly by the inner circumferential delimiting ring 17.
  • the side channel 19 runs in the housing 3 in the direction of the axis of rotation 4 in such a way that it runs axially to the respective delivery cell 28 on one side or on both sides.
  • the side channel 19 can run circumferentially around the axis of rotation 4 at least in a partial area of the housing 3, with an interrupter area 15 being formed in the housing 3 in the partial area in which the side channel 19 is not formed in the housing 3 (see Fig . 2).
  • the housing lower part 8 has a cylindrical bearing pin 36, where the compressor wheel 2 is mounted on the bearing pin 36 by means of a first bearing 27 and / or a second La gers 29, each of which is designed in particular as a deep groove ball bearing 27, 29 is.
  • the compressor wheel 2, in particular at least indirectly via the receiving flange 25, and / or the respective bearings 27, 29 can each be secured indirectly or directly via a second screw connection 40 on the bearing journal 36, in particular in the direction of the axis of rotation 4.
  • FIG. 1 shows that the drive 6 has at least one stator 12 with at least one copper winding 12, the stator 12 being energized in such a way and / or forming a magnetic field such that inductive heating of the rotor 10 and / or a drive housing 24 and / or further components, the rotor 10 being connected to the drive shaft 22, in particular in a form-fitting and / or materially and / or force-fittingly.
  • the drive housing 24 can be designed in the shape of a pot or a sleeve.
  • the drive 6 is enclosed by the drive housing 24 and thus encapsulates the area outside the side channel compressor 1.
  • the drive housing 24 is in contact with the housing 3, in particular the upper housing part 7, the drive housing 24 forming at least two contact surfaces axially to the axis of rotation 4 with the housing 3 and at least one through a formed shoulder, for example radial to the axis of rotation 4 extending contact surface with the housing 3 forms.
  • the paragraph also enables the drive housing 24 to be aligned and / or centered relative to the housing 3, in particular during assembly.
  • at least one sealing element in particular a sealing element rotating around the axis of rotation 4, can be arranged between the drive housing 24 and the housing 3, the at least one sealing element being, for example, an O-ring.
  • the drive housing 24 can also have cooling ribs 33 on its surface, which provide improved discharge the thermal energy in the environment.
  • Heat occurs in the drive 6 in such a way that the driving of the compressor wheel 2 generates excess heat energy, which is present in particular as frictional heat or inductive magnetic heat. This heat can be dissipated faster to the environment due to the cooling ribs 33 of the drive 6, since the drive 6 has an enlarged surface due to the cooling ribs 33.
  • the drive shaft 22 is supported by means of a third bearing 31 and a fourth bearing 35, in particular in the drive housing 24, where there is at least one bearing 31, 35 in a cup-shaped stepped section 39 of the drive housing 24 is located and / or at least one bearing 31, 35 is located in a cylindrical extension 41 of a cover 26.
  • the pot-shaped stepped section 39 and / or the cylindrical extension 41 can run at least partially circumferentially around the axis of rotation 4, in particular in the form of a sleeve.
  • Fig. 2 shows a section, labeled AA in Fig. 1, of the bykanalverdich age 1 in an enlarged view in which the lower housing part 8, the gas inlet opening 14, the gas outlet opening 16, the interrupter area 15, the side channel 19 and a direction of rotation 20 (of the compressor wheel 2, not shown) are shown.
  • the interrupter area 15 is located circumferentially around the axis of rotation 4 in the housing 3, in particular between the gas inlet opening 14 and the gas outlet opening 16.
  • the gaseous medium is conveyed through the Ver denser wheel 2 and / or flows in the process from the gas inlet opening 14 to the gas outlet opening 16 and flows through, at least partially, the side channel 19.
  • the interrupter area 15 separates a pressure side and a suction side, with the suction side in the area of the gas inlet opening 14 and the pressure side is in the region of the gas outlet opening 16.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fuel Cell (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un compresseur à canal latéral (1) pour un système de pile à combustible destiné à transporter et/ou comprimer un gaz, en particulier de l'hydrogène, comprenant un boîtier (3) et un entraînement (6), le boîtier (3) présentant une partie supérieure de boîtier (7) et une partie inférieure de boîtier (8), une chambre de compresseur (30) qui circule dans le boîtier (3) autour d'un axe de rotation (4) et présente au moins un canal latéral périphérique (19), une roue de compresseur (2) qui est située dans le boîtier (3), est agencée en rotation autour de l'axe de rotation (4) et est entraînée par l'entraînement (6), ladite roue de compresseur (2) comprenant des pales (5) qui sont agencées au niveau de sa circonférence dans la zone de la chambre de compresseur (30), et comprenant une ouverture d'entrée de gaz (14) et une ouverture de sortie de gaz (16) formée dans chaque cas sur le boîtier (3), lesdites ouvertures étant en communication fluidique l'une avec l'autre par l'intermédiaire de la chambre de compresseur (30), en particulier par l'intermédiaire de l'au moins un canal latéral (19). Selon l'invention, le compresseur à canal latéral (1) présente un couplage magnétique (42), en particulier un couplage magnétique intégré (42), un couple, en particulier un couple indirect, étant transmissible de l'entraînement (6) à la roue de compresseur (2) au moyen du couplage magnétique (42).
PCT/EP2020/081873 2019-12-18 2020-11-12 Compresseur à canal latéral pour un système de pile à combustible permettant de transporter et/ou de comprimer un gaz WO2021121798A1 (fr)

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DE102019219998.4 2019-12-18
DE102019219998.4A DE102019219998A1 (de) 2019-12-18 2019-12-18 Seitenkanalverdichter für ein Brennstoffzellensystem zur Förderung und/oder Verdichtung eines Gases

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Publication number Priority date Publication date Assignee Title
DE102022207715A1 (de) 2022-07-27 2024-02-01 Robert Bosch Gesellschaft mit beschränkter Haftung Magnetrotoreinrichtung für einen Seitenkanalverdichter für ein Brennstoffzellensystem, Seitenkanalverdichter und Verfahren zum Herstellen einer Magnetrotoreinrichtung für einen Seitenkanalverdichter für ein Brennstoffzellensystem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0984143A2 (fr) * 1998-09-03 2000-03-08 Concentric Pumps Limited Pompe rotative
DE102007046014A1 (de) 2007-09-26 2009-04-02 Daimler Ag Pumpe und Brennstoffzellensystem mit einer Pumpe
US20150125324A1 (en) * 2011-12-13 2015-05-07 Eagleburgmann Germany Gmbh & Co. Kg Rotary compressor
DE102016210464A1 (de) * 2016-06-14 2017-12-14 Gardner Denver Deutschland Gmbh Verdichteranordnung
DE102018204713A1 (de) * 2018-03-28 2019-10-02 Robert Bosch Gmbh Seitenkanalverdichter für ein Brennstoffzellensystem zur Förderung und/oder Verdichtung von einem gasförmigen Medium

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0984143A2 (fr) * 1998-09-03 2000-03-08 Concentric Pumps Limited Pompe rotative
DE102007046014A1 (de) 2007-09-26 2009-04-02 Daimler Ag Pumpe und Brennstoffzellensystem mit einer Pumpe
US20150125324A1 (en) * 2011-12-13 2015-05-07 Eagleburgmann Germany Gmbh & Co. Kg Rotary compressor
DE102016210464A1 (de) * 2016-06-14 2017-12-14 Gardner Denver Deutschland Gmbh Verdichteranordnung
DE102018204713A1 (de) * 2018-03-28 2019-10-02 Robert Bosch Gmbh Seitenkanalverdichter für ein Brennstoffzellensystem zur Förderung und/oder Verdichtung von einem gasförmigen Medium

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