WO2023160893A1 - Dispositif de rotor magnétique pour un ventilateur destiné à un dispositif de pile à combustible, dispositif de ventilateur et procédé de fabrication d'un dispositif de rotor magnétique pour un ventilateur destiné à un dispositif de pile à combustible - Google Patents

Dispositif de rotor magnétique pour un ventilateur destiné à un dispositif de pile à combustible, dispositif de ventilateur et procédé de fabrication d'un dispositif de rotor magnétique pour un ventilateur destiné à un dispositif de pile à combustible Download PDF

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Publication number
WO2023160893A1
WO2023160893A1 PCT/EP2023/050410 EP2023050410W WO2023160893A1 WO 2023160893 A1 WO2023160893 A1 WO 2023160893A1 EP 2023050410 W EP2023050410 W EP 2023050410W WO 2023160893 A1 WO2023160893 A1 WO 2023160893A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
magnet
hub
fan
cover
Prior art date
Application number
PCT/EP2023/050410
Other languages
German (de)
English (en)
Inventor
Thomas Schwarz
Rene Schepp
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 WO2023160893A1 publication Critical patent/WO2023160893A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Definitions

  • the present invention relates to a magnet rotor device for a fan for a fuel cell device, a fan device and a method for producing a magnet rotor device for a fan for a fuel cell device.
  • a fuel cell system Due to the principle of the fuel cell, a fuel cell system has an anode path, which is also referred to as a hydrogen path. In order to achieve low consumption of hydrogen in the fuel cell, it can be important to recirculate the unused hydrogen.
  • Side channel compressors are preferably used for this recirculation, this as a so-called recirculation fan, which can have a side channel compressor.
  • the side channel compressors are a type of centrifugal wheel compressors, these are divided into star wheel compressors or peripheral wheel compressors based on the impeller used and the fluid flow.
  • a fluid to be conveyed can be supplied to the working space with the impeller via an inlet connection. It can do this by means of an electric motor in turn, the impeller can be driven and rotated. The impeller rotates to the axially arranged one-sided or two-sided lateral flow channels (side channels).
  • the rotating impeller can transfer energy to part of the flow, whereby the fluid can circulate in the blades and the side channels, thereby forming a circulation flow.
  • the energy can be transferred from this circulation flow to the delivery flow in the side channel by means of momentum exchange, whereby a conversion of velocity energy into pressure energy can take place.
  • the energy transfer takes place several times over the entire length of the side channel and so a large energy transfer is possible.
  • the pressure at the outlet connection then ultimately increases compared to the inlet connection.
  • DE 10 2018 204 713 A1 describes a side channel compressor for a fuel cell system for conveying and/or compressing a gaseous medium.
  • the present invention provides a magnet rotor device for a fan for a fuel cell device according to claim 1, a fan device according to claim 9 and a method for manufacturing a magnet rotor device for a fan for a fuel cell device according to claim 10.
  • the idea on which the present invention is based is to specify a magnet rotor device for a fan for a fuel cell device, a fan device and a method for producing a magnet rotor device for a fan for a fuel cell device, with the fixing of rotor magnets on the rotor being able to be improved.
  • the magnet rotor device can advantageously be easily implemented in large series as a compressor wheel assembly or as an individual component.
  • the magnet rotor device for a blower for a fuel cell device comprises a rotor body which is mounted so as to be rotatable about an axis; at least one rotor magnet, the rotor body including a hub to which the at least one rotor magnet is attached; a rotor magnet support which is attached to or is part of the hub and against which the rotor magnet abuts; a cover which is attached to the bracket and covers the rotor magnet on a side remote from the hub; and a compressor wheel, which is attached to the hub and with which a gas flow can be generated.
  • the magnet rotor device can advantageously comprise a rotor with a hub, rotatable about an axis, and a stator, which can face the rotor on its magnet side.
  • the rotor magnet can comprise one or more partial magnets which, in a plan view from the side of the stator and advantageously seen along the axis of rotation of the rotor, can cover an end face of the hub of the rotor, advantageously closing a circle around the axis.
  • the holder for the rotor magnet can be a rim of a recess, for example with one or more side walls, which can surround the rotor magnet on a radial inside and/or radial outside with respect to the axis.
  • the rotor magnet may be mechanically attached to the hub, such as with a fastener and/or adhesive.
  • the compressor wheel can have lamellae and run around the hub and be arranged with the hub coaxially with respect to the axis.
  • the compressor wheel can be inserted into the hub and/or screwed to it or fixed in some other way.
  • the blower for a fuel cell device can include a side channel compressor for a fuel cell system for conveying and/or compressing a gaseous medium, such as hydrogen.
  • the fan can be an anode recirculation fan.
  • the fan comprises a recirculation fan for hydrogen.
  • a volumetric flow of hydrogen in the recirculation circuit such as an anode of the fuel cell, can be generated by the compressor wheel.
  • the hub comprises a ferritic hub.
  • the material can have the same coefficient of thermal expansion as the outer ring of the ball bearing (e.g. martensitic stainless steel 1.4108), which is pressed into it.
  • This has the advantage that the radial play in the ball bearing can be kept small, since there does not have to be a pressure change over temperature. This also reduces axial play, which can be very important for hydraulic/pneumatic efficiency.
  • the bearings are not unnecessarily stressed by the interference fit, which increases the service life of the bearings and can make more favorable material pairings possible in the ball bearing.
  • the holder comprises an austenitic sleeve which is placed on the hub coaxially with the axis.
  • the sleeve can represent a radial outer stop for the rotor magnet or magnets and keep them fixed within a certain radius around the axis and compensate for radial centrifugal forces.
  • the cover comprises a deep-drawn plate.
  • the advantage of this is that a tight seal for the magnets can be easily manufactured here.
  • the plate (austenitic stainless steel) can be welded onto the rotor.
  • the holder is welded to the hub and/or the cover is welded to the holder and to the rotor body.
  • a side wall of the rotor body, the hub and the holder together form a recess for the at least one rotor magnet, which is covered by the cover when the rotor magnet is inserted.
  • the rotor magnet can be robustly covered against an air gap between the rotor and stator.
  • the magnet rotor device comprises an even number of magnetizable rotor magnets, which are placed on one side of the hub and form a circle, or circle segments, when viewed along the axis, the magnetizable rotor magnets forming an alternating sequence of magnetic north and south poles form.
  • a construction of an axial flow machine can be achieved, which can be significantly smaller than a radial flow machine.
  • the cover can advantageously represent a non-magnetic cover.
  • a thick (in the radial direction) wall thickness of the sleeve is required, advantageously at least a predetermined thickness (wall thickness).
  • the thinnest possible wall thickness of the cover (cover) is required axially in the direction of the stator in order to keep the air gap between the rotor magnet and the stator small and to keep the resulting eddy current losses small.
  • the thickness of the lid (of the covering) can lie, for example, in a predetermined range of values.
  • the magnetic rotor device can consist of a ferritic hub (e.g. 1.4511), which can generate the magnetic yoke.
  • This ferritic steel is very corrosion-resistant and has the advantage that it can have the same coefficient of thermal expansion as a ball bearing outer ring (martensitic stainless steel 1.4108), which can be pressed into this hub (e.g. into a recess around the axle).
  • the bearings are not unnecessarily stressed by the interference fit. This can increase the service life of the bearings or make cheaper material pairings in the ball bearing possible.
  • the centrifugal forces of the magnet segments are now absorbed by an austenitic (1 .4404) sleeve that can be welded onto the ferritic hub. Since the austenitic stainless steel is completely non-magnetic, it can be pulled completely over the magnet without affecting the magnetic return.
  • the magnet is chambered by means of an austenitic sheet metal, which can preferably be produced as a stamped part. This is then sealed axially by means of an overlap joint.
  • the sheet metal (cover) can be non-magnetic and, together with the sleeve and the hub, form the enclosure for the magnets.
  • Another great advantage is that the presented design can greatly improve water accumulation in the stator area. This has the advantage that the compressor wheel assembly (the magnetic rotor device) has less of a tendency to freeze up at low temperatures.
  • Another advantage to the known is the center of gravity of the compressor wheel assembly.
  • the bearing is located directly above the stator and, according to the invention, directly between the two To store. This causes a significant stabilization and thus an increase in the bearing service life and thus an increase in the service life of the ARB
  • the blower device comprises a stator and a magnet rotor device according to the invention.
  • a rotor body which is mounted such that it can rotate about an axis; providing at least one rotor magnet, wherein the rotor body includes a hub to which the at least one rotor magnet is attached; providing a rotor magnet mount which attaches to the hub and against which the rotor magnet abuts; providing a cover which is attached to the bracket and covers the rotor magnet on a side remote from the hub; providing a compressor wheel, which is attached to the hub and with which a gas flow can be generated.
  • the holder is welded to the hub and/or the cover is welded to the holder and to the rotor body.
  • the magnetic rotor device and/or the blower device can also be distinguished by the features mentioned in connection with the method and its advantages, and vice versa.
  • FIG. 2 shows a schematic representation of rotor magnets in a magnet rotor device according to an embodiment of the present invention
  • FIG. 3 shows a block diagram of method steps of the method for manufacturing a magnet rotor device according to an embodiment of the present invention.
  • FIG. 4 shows a schematic illustration of a compressor wheel assembly with a magnet rotor device according to an exemplary embodiment of the present invention.
  • FIG. 1 shows a schematic representation of a magnet rotor device according to an exemplary embodiment of the present invention.
  • the magnet rotor device 10 for a fan for a fuel cell device comprises a rotor body RT, which is rotatably mounted about an axis A; at least one rotor magnet RM, the rotor body RT comprising a hub NB to which the at least one rotor magnet RM is fixed (see perspective view in FIG. 4 ); a rotor magnet RM bracket HA which is fixed to the hub NB and to which the rotor magnet RM abuts; a cover AB fixed to the bracket HA and covering the rotor magnet RM on a side opposite to the hub NB; and a compressor wheel VD, which is attached to the hub NB and with which a gas flow can be generated.
  • the compressor wheel can be pressed against the hub NB with a spring plate FD or washer and screwed to the hub NB via the spring plate FD or washer with a screw SR.
  • the support HA can comprise an austenitic sleeve which can be fitted coaxially with the axis A on the hub NB.
  • the cover AB may include a deep drawn plate of equal thickness in all or most places.
  • the bracket HA can be welded to the hub NB via a third weld SW3. Furthermore, the cover AB can be welded to the bracket HA via a second weld seam SN2 (and partially overlap the bracket and be welded there) and the cover AB can be partially or completely welded to the rotor body RT, advantageously to the side wall SW completely overlapping, be welded with a first weld seam SN1. To fix the rotor magnet RM in place, the side wall SW of the rotor body RT, the hub NB and the bracket HA can together form a recess AS for the at least one rotor magnet RM, advantageously with a precise fit, which is covered by the cover AB when the rotor magnet RM is inserted.
  • the magnet rotor device 10 can be manufactured according to the following example. Accordingly, the rotor consists, for example, of a hub (ferritic stainless steel, e.g. 1.4511), an austenitic sleeve (1.4404), 4 segment magnets (preferably NdFeB) and a cover plate (austenitic stainless steel, e.g. X2CrNiMo17-12-2 (1.4404)).
  • the austenitic sleeve is pressed onto the ferritic hub and sealed radially by means of a lap joint or other types of welding.
  • the still non-magnetic segment magnets made of NdFeB, for example, are inserted, positioned and, if necessary, fixed in the free intermediate spaces (resulting recess) (FIG. 4, before inserting the further circle segments).
  • the non-magnetic cover disc (austenitic stainless steel) is then tightly welded to the hub end using laser welding.
  • the aluminum compressor wheel VD is then pressed/joined onto the rotor.
  • the rustproof clamping disc FD is positioned on the rotor and screwed with 4 rustproof pan head screws SR (radially circumferential, Fig. 1 shows only one screw SR).
  • the task of the clamping disk FD is to clamp the compressor wheel VD against the rotor RT.
  • Magnet segments RM are magnetized in the order shown in FIG.
  • FIG. 2 shows a schematic representation of rotor magnets in a magnet rotor device according to an exemplary embodiment of the present invention.
  • the rotor magnets RM can form several circle segments and rotate around the axis A radially.
  • the cover AB can complete the circle segments radially for each circle segment individually or as a whole and in one piece.
  • the circle segments can represent an even number of magnetizable rotor magnets RM, which are placed on one side of the hub NB, side of the top view, and from a view along the axis A can form a circle of circle segments, the magnetizable rotor magnets RM an alternating sequence of magnetic North N and South Pole S can form.
  • spacer areas DB can be present, which can separate the rotor magnets from one another laterally (in the radial rotation).
  • FIG. 3 shows a block diagram of method steps of the method for producing a magnet rotor device for a fan for a fuel cell device according to an exemplary embodiment of the present invention.
  • a rotor body is provided S1, which is mounted so as to be rotatable about an axis; providing S2 at least one rotor magnet, the rotor body comprising a hub to which the at least one rotor magnet is attached; providing S3 a holder for the rotor magnet, which is attached to the hub and against which the rotor magnet abuts; providing S4 a cover which is attached to the bracket and covers the rotor magnet on a side facing away from the hub; providing S5 a compressor wheel, which is attached to the hub and with which a gas flow can be generated.
  • FIG. 4 shows a schematic illustration of a compressor wheel assembly with a magnet rotor device according to an exemplary embodiment of the present invention.
  • FIGS. 4a and 4b Various perspective views of the magnet rotor device 10 in a compressor wheel assembly are shown in FIGS. 4a and 4b.
  • the magnet rotor device 10 comprises a rotor body which is rotatably mounted about an axis A.
  • 4b shows that several rotor magnets RM can be present, which can be arranged on one end face of the hub.
  • 4b shows a view from the front, which can face the stator, with the flat areas of the rotor magnets RM, which can run around the axis A as circular segments, similar to FIG. 2, alternating north and south poles.
  • a compressor wheel VD with lamellae is fastened to the hub NB, with which a gas flow can be generated.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un dispositif de rotor magnétique (10) pour un ventilateur destiné à un dispositif de pile à combustible, comprenant un corps de rotor (RT) monté rotatif autour d'un axe (A) ; au moins un aimant de rotor (RM), le corps de rotor (RT) comprenant un moyeu (NB) auquel le ou les aimants de rotor (RM) sont fixés ; un support (HA) pour l'aimant de rotor (RM), ce support étant fixé au moyeu (NB) et supportant l'aimant de rotor (RM) ; un couvercle (AB) fixé au support (HA) et recouvrant l'aimant de rotor (RM) sur une face opposée au moyeu (NB) ; et une roue de compresseur (VD) fixée au moyeu (NB) et permettant de générer un flux de gaz.
PCT/EP2023/050410 2022-02-25 2023-01-10 Dispositif de rotor magnétique pour un ventilateur destiné à un dispositif de pile à combustible, dispositif de ventilateur et procédé de fabrication d'un dispositif de rotor magnétique pour un ventilateur destiné à un dispositif de pile à combustible WO2023160893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022201973.3 2022-02-25
DE102022201973.3A DE102022201973A1 (de) 2022-02-25 2022-02-25 Magnetrotoreinrichtung für ein Gebläse für eine Brennstoffzelleneinrichtung, Gebläseeinrichtung und Verfahren zum Herstellen einer Magnetrotoreinrichtung für ein Gebläse für eine Brennstoffzelleneinrichtung

Publications (1)

Publication Number Publication Date
WO2023160893A1 true WO2023160893A1 (fr) 2023-08-31

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PCT/EP2023/050410 WO2023160893A1 (fr) 2022-02-25 2023-01-10 Dispositif de rotor magnétique pour un ventilateur destiné à un dispositif de pile à combustible, dispositif de ventilateur et procédé de fabrication d'un dispositif de rotor magnétique pour un ventilateur destiné à un dispositif de pile à combustible

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WO (1) WO2023160893A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5691589A (en) * 1995-06-30 1997-11-25 Kaman Electromagnetics Corporation Detachable magnet carrier for permanent magnet motor
DE102018204713A1 (de) 2018-03-28 2019-10-02 Robert Bosch Gmbh Seitenkanalverdichter für ein Brennstoffzellensystem zur Förderung und/oder Verdichtung von einem gasförmigen Medium
DE102020200234A1 (de) * 2020-01-10 2021-07-15 Robert Bosch Gesellschaft mit beschränkter Haftung Seitenkanalverdichter für ein Brennstoffzellensystem zur Förderung und/oder Verdichtung von einem gasförmigen Medium, insbesondere Wasserstoff
CN113357170A (zh) * 2021-06-04 2021-09-07 烟台东德实业有限公司 一种燃料电池氢路串联集成系统
US20210288533A1 (en) * 2018-09-18 2021-09-16 Sumitomo Electric Industries, Ltd. Rotating electric machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5691589A (en) * 1995-06-30 1997-11-25 Kaman Electromagnetics Corporation Detachable magnet carrier for permanent magnet motor
DE102018204713A1 (de) 2018-03-28 2019-10-02 Robert Bosch Gmbh Seitenkanalverdichter für ein Brennstoffzellensystem zur Förderung und/oder Verdichtung von einem gasförmigen Medium
US20210288533A1 (en) * 2018-09-18 2021-09-16 Sumitomo Electric Industries, Ltd. Rotating electric machine
DE102020200234A1 (de) * 2020-01-10 2021-07-15 Robert Bosch Gesellschaft mit beschränkter Haftung Seitenkanalverdichter für ein Brennstoffzellensystem zur Förderung und/oder Verdichtung von einem gasförmigen Medium, insbesondere Wasserstoff
CN113357170A (zh) * 2021-06-04 2021-09-07 烟台东德实业有限公司 一种燃料电池氢路串联集成系统

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