CN114526248A - Centrifugal air compressor for hydrogen fuel cell - Google Patents
Centrifugal air compressor for hydrogen fuel cell Download PDFInfo
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- CN114526248A CN114526248A CN202210192086.7A CN202210192086A CN114526248A CN 114526248 A CN114526248 A CN 114526248A CN 202210192086 A CN202210192086 A CN 202210192086A CN 114526248 A CN114526248 A CN 114526248A
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- spiral groove
- thrust bearing
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- groove thrust
- radial
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- 239000000446 fuel Substances 0.000 title claims abstract description 27
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000001257 hydrogen Substances 0.000 title claims abstract description 24
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 24
- 239000011888 foil Substances 0.000 claims abstract description 117
- 230000003287 optical effect Effects 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- 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
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/03—Machines characterised by thrust bearings
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a centrifugal air compressor for a hydrogen fuel cell, which comprises: the device comprises a shell assembly, a motor stator, a motor rotor assembly, a radial bump foil bearing assembly, a spiral groove thrust bearing assembly and a volute; the motor stator is arranged in the shell assembly, and the motor rotor assembly is arranged in the motor stator; the radial bump foil bearing assembly is mounted on the housing assembly and the spiral groove thrust bearing assembly is mounted on the housing assembly; the volute is connected with the radial bump foil bearing assembly. The invention has scientific and reasonable structural design and compact structure of the whole machine, can completely meet the requirements of the hydrogen fuel cell air compressor and improves the running performance of the whole machine.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cells, in particular to a centrifugal air compressor for a hydrogen fuel cell.
Background
An air compressor is one of the core components of a fuel cell system, and is used for providing clean oxygen for the cathode of an electric fuel cell stack. At present, magnetic steel is generally installed on a centrifugal air compressor rotor assembly for a hydrogen fuel cell, the size and the weight of a rotor can be reduced by the structure, a centrifugal impeller is arranged at one end of the rotor, and when the rotor rotates at a high speed, the impeller drives gas to rotate at a high speed and outputs high-pressure air through a diffuser and a volute.
Fuel cell systems require a clean air supply, which conventional oil lubricated bearings cannot meet. Air bearings are therefore generally used as support for the rotor. The air bearing can realize high rotating speed, and has small friction loss and high efficiency.
In order to solve the stability of the high-speed operation of the air compressor rotor, the problems of the type of a bearing, the rotor dynamics and the like need to be comprehensively considered and solved during the design of the air compressor.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a centrifugal air compressor for a hydrogen fuel cell, which has scientific and reasonable structural design and compact structure of the whole air compressor, can completely meet the requirements of the hydrogen fuel cell air compressor, and improves the running performance of the whole air compressor.
The invention provides a centrifugal air compressor for a hydrogen fuel cell, comprising: the motor comprises a shell assembly, a motor stator, a motor rotor assembly, a radial wave foil bearing assembly, a spiral groove thrust bearing assembly and a volute; the motor stator is arranged in the shell assembly, and the motor rotor assembly is arranged in the motor stator; the radial foil bearing assembly is mounted on the housing assembly and the helical groove thrust bearing assembly is mounted on the housing assembly; the volute is connected with the radial wave foil bearing assembly.
Preferably, the housing assembly comprises: a housing and an end cap; the end cover is arranged at the bottom of the casing and is positioned at one end far away from the volute; the motor stator is arranged in a cavity formed by the shell and the end cover.
Preferably, the motor rotor assembly comprises: the device comprises an optical axis component, an impeller, a thrust disc and a fan; the impeller is arranged at one end, close to the volute, of the optical axis assembly through an impeller locking nut; the fan is arranged at one end, close to the end cover, of the optical axis assembly through a fan locking nut; the thrust disc is connected with the fan and is arranged at one end, far away from the end cover, of the fan.
Preferably, the optical axis assembly includes: an optical axis, magnetic steel and a metal sheath; the magnetic steel is arranged in the middle of the optical axis, and the metal sheath is arranged outside the magnetic steel.
Preferably, the radial wave foil bearing assembly comprises: the bearing comprises a first radial wave foil bearing, a second radial wave foil bearing, a first radial wave foil bearing seat and a second radial wave foil bearing seat, wherein the first radial wave foil bearing is connected with the first radial wave foil bearing seat through a screw, and the second radial wave foil bearing is connected with the second radial wave foil bearing seat through a screw.
Preferably, the bearing further comprises a labyrinth seal, and the labyrinth seal is mounted on the first radial corrugated foil bearing seat through a screw.
Preferably, the first radial wave foil bearing and the second radial wave foil bearing each comprise: the radial wave foil bearing comprises a radial wave foil bearing support body, a radial wave foil bearing wave foil and a radial wave foil bearing top foil; one end of the radial wave foil bearing wave foil is fixed on the radial wave foil bearing support body, and the other end of the radial wave foil bearing wave foil is a free end; the radial wave foil bearing top foil is arranged on the radial wave foil bearing wave foil, one end of the radial wave foil bearing top foil is fixed on the radial wave foil bearing supporting body, and the other end of the radial wave foil bearing top foil is a free end.
Preferably, the spiral groove thrust bearing assembly comprises: the thrust bearing comprises a first spiral groove thrust bearing, a second spiral groove thrust bearing and a spiral groove thrust bearing seat; the first spiral groove thrust bearing and the second spiral groove thrust bearing are symmetrically arranged on two sides of the thrust disc; the second spiral groove thrust bearing is connected with the second radial bump foil bearing seat through a screw, and the first spiral groove thrust bearing is connected with the spiral groove thrust bearing seat through a screw.
Preferably, the first and second spiral groove thrust bearings each include: the spiral groove thrust bearing comprises a spiral groove thrust bearing support body, a spiral groove thrust bearing air inlet, a spiral groove thrust bearing groove area and a spiral groove thrust bearing dam area;
the cross section of the spiral groove thrust bearing supporting body is circular, the spiral groove thrust bearing groove area and the spiral groove thrust bearing dam area are arranged concentrically with the spiral groove thrust bearing supporting body, and the inner diameter of the spiral groove thrust bearing dam area is smaller than that of the spiral groove thrust bearing groove area; the outer diameter of the dam area of the spiral groove thrust bearing is equal to the outer diameter of the groove area of the spiral groove thrust bearing; the spiral groove thrust bearing air inlet is positioned at the outer diameter of the spiral groove thrust bearing groove area, and the spiral groove thrust bearing groove area and the spiral groove thrust bearing dam area are uniformly distributed at intervals along the circumferential direction; the spiral groove thrust bearing groove area is a groove engraved on the spiral groove thrust bearing dam area.
Preferably, the depth of the spiral groove thrust bearing groove region is 15 to 35 μm.
Compared with the prior art, the invention has the beneficial effects that:
1. the combination of the radial wave foil bearing assembly and the spiral groove thrust bearing assembly is adopted for the first time, the good rotor dynamics stability function of the radial wave foil bearing is utilized, and the advantages of large rigidity, high bearing capacity, simple structure and processing and the like of the spiral groove thrust bearing are utilized, so that the running performance of the whole machine is improved;
2. the bearings in the wave foil bearing assembly and the spiral groove thrust bearing assembly do not need oil lubrication, the energy consumption is low, and the oil-free requirement of the hydrogen fuel cell is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic cross-sectional view of a centrifugal air compressor for a hydrogen fuel cell according to an embodiment of the present invention;
FIG. 2 is a schematic view of a rotor assembly according to an embodiment of the present invention;
FIG. 3 is a schematic view of a radial wave foil bearing according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a spiral groove thrust bearing according to an embodiment of the present invention.
Description of reference numerals:
1: a housing assembly; 11: a housing; 12: a motor stator; 13: a second radial bump foil bearing mount; 14: a spiral groove thrust bearing seat; 15: an end cap; 16: a first helical groove thrust bearing; 17: a second helical groove thrust bearing; 18: a second radial wave foil bearing; 19: a first radial foil bearing; 110: sealing the comb teeth; 111: a first radial bump foil bearing mount; 112: a volute; 2: a motor rotor assembly; 21: an impeller lock nut; 22: an impeller; 23: magnetic steel; 24: a metal sheath; 25: an optical axis; 26: a thrust disc; 27: a fan; 28: a fan lock nut; 30: a radial bump foil bearing support; 31: radial wave foil bearing wave foil; 32: a radial bump foil bearing top foil; 40: a spiral groove thrust bearing support; . 41: a helical groove thrust bearing air inlet; 42: a helical groove thrust bearing groove region; 43: spiral groove thrust bearing dam region.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 4, the present invention provides a centrifugal air compressor for a hydrogen fuel cell, comprising: a housing assembly 1, a motor stator 12, a motor rotor assembly 2, a radial wave foil bearing assembly, a spiral groove thrust bearing assembly, and a volute 112. The motor stator 12 is disposed within the housing assembly 1 and the motor rotor assembly 2 is disposed within the motor stator 12. The radial wave foil bearing assembly is mounted on the housing assembly 1, the spiral groove thrust bearing assembly is mounted on the housing assembly 1, and the volute 112 is connected to the radial wave foil bearing assembly.
As shown in fig. 1, in some embodiments, the housing assembly 1 comprises: a housing 11 and an end cap 15. The end cap 15 is disposed at the bottom of the housing 11 at an end remote from the volute 112. The motor stator 12 is disposed within a cavity formed by the housing 11 and the end cap 15 and is disposed coaxially with the cavity of the housing 11. The motor stator 12 includes: the iron core is formed by laminating silicon steel sheets, the coil is embedded into a wire slot of the iron core, and a three-phase wire is led out to be connected with an external power supply.
As shown in fig. 2, in some embodiments, the electric machine rotor assembly 2 includes: an optical axis assembly, an impeller 22, a thrust disc 26 and a fan 27. The impeller 22 is mounted on one end of the optical axis assembly close to the volute 112 through an impeller locking nut 21 for axial locking and fixing. The fan 27 is mounted on the end of the optical axis assembly near the end cap 15 by a fan lock nut 28 for axial locking fixation. The fan 27 can provide a cooling air source for axial cooling of the spiral groove thrust bearing, the radial wave foil bearing and the magnetic steel 23, and the bearing and the magnetic steel are guaranteed not to be over-temperature. The thrust disc 26 is connected to a fan 27 and is mounted on the end of the fan 27 remote from the end cap 15.
As shown in fig. 2, in some embodiments, the optical axis assembly comprises: optical axis 25, magnetic steel 23 and metal sheath 24. The magnetic steel 23 is installed in the middle of the optical axis 25, and the metal sheath 24 is installed outside the magnetic steel 23 and in interference fit with the magnetic steel 23 so as to bear the centrifugal force generated when the optical axis 25 rotates at a high speed and guarantee the reliability and safety of operation. Both ends of the optical axis 25 have highly accurately machined journal regions, respectively.
In some embodiments, a radial wave foil bearing assembly comprises: the first radial wave foil bearing 19 is connected with the first radial wave foil bearing seat 111 through a screw, and the second radial wave foil bearing 18 is connected with the second radial wave foil bearing seat 13 through a screw. The centrifugal air compressor for the hydrogen fuel cell further comprises a labyrinth seal 110, and the labyrinth seal 110 is mounted on a first radial corrugated foil bearing seat 111 through screws. The labyrinth seal 110 reduces leakage and ensures the efficiency of the air compressor.
As shown in fig. 3, in some embodiments, the first radial wave foil bearing 19 and the second radial wave foil bearing 18 each include: a radial wave foil bearing support 30, a radial wave foil bearing wave foil 31 and a radial wave foil bearing top foil 32. One end of the radial wave foil bearing wave foil 31 is fixed on the radial wave foil bearing support body 30, and the other end is a free end. The radial bump bearing top foil 32 is disposed on the radial bump bearing bump foil 31, one end of which is fixed on the radial bump bearing support 30, and the other end of which is a free end.
In some embodiments, a spiral groove thrust bearing assembly comprises: a first helical groove thrust bearing 16, a second helical groove thrust bearing 17, and a helical groove thrust bearing seat 14. The first spiral groove thrust bearing 16 and the second spiral groove thrust bearing 17 are symmetrically arranged on both sides of the thrust disc 26. The second spiral groove thrust bearing 17 is connected with the second radial bump foil bearing seat 13 through a screw, and the first spiral groove thrust bearing 16 is connected with the spiral groove thrust bearing seat 14 through a screw.
In some embodiments, the first and second spiral groove thrust bearings 16, 17 each include: a spiral groove thrust bearing support 40, a spiral groove thrust bearing air inlet 41, a spiral groove thrust bearing groove region 42, and a spiral groove thrust bearing dam region 43. The cross section of the spiral groove thrust bearing supporting body 40 is circular, a spiral groove thrust bearing groove area 42 and a spiral groove thrust bearing dam area 43 are arranged concentrically with the spiral groove thrust bearing supporting body 40, and the inner diameter of the spiral groove thrust bearing dam area 43 is smaller than that of the spiral groove thrust bearing groove area 42; the outer diameter of the helical groove thrust bearing dam region 43 is equal to the outer diameter of the helical groove thrust bearing groove region 42; the spiral groove thrust bearing air inlet 41 is positioned at the outer diameter of the spiral groove thrust bearing groove area 42, and the spiral groove thrust bearing groove area 42 and the spiral groove thrust bearing dam area 43 are uniformly distributed at intervals along the circumferential direction; the groove region 42 of the spiral groove thrust bearing is a groove engraved in the dam region 43 of the spiral groove thrust bearing
The spiral groove thrust bearing groove region 42 is formed by laser or metal etching. The depth of the spiral groove thrust bearing groove region 42 is 15 to 35 μm. Preferably, the depth of the spiral groove thrust bearing groove region 42 is 20 μm.
The assembly process of the invention is as follows:
as shown in fig. 1, the housing 11 and the motor stator 12 are sequentially connected by screws, an assembly body composed of the first radial wave foil bearing 19, the labyrinth seal 110, and the first radial wave foil bearing seat 111 is connected by screws with screw holes at the left end of the housing 11, and an assembly body composed of the second radial wave foil bearing 18, the second radial wave foil bearing seat 13, and the second helical groove thrust bearing 17 is connected by screws with screw holes at the right end face of the housing 11.
After a rotor without an impeller 22, a fan 27, a thrust disc 26, an impeller locking nut 21 and a fan locking nut 28 sequentially passes through a first radial wave foil bearing 19, a motor stator 12 and a second radial wave foil bearing 18, the impeller 22 penetrates through an optical axis 25, the impeller locking nut 21 is used for fixing, a volute 112 and a first radial wave foil bearing seat 111 are connected through screws, and the left part of the air compressor is completely assembled.
The thrust disc 26 is inserted into the optical axis 25, an assembly body composed of the spiral groove thrust bearing seat 14 and the first spiral groove thrust bearing 16 is fixed on the casing 11 by screws, the fan 27 is inserted into the optical axis 25, axial fixing is carried out by the fan locking nut 28, and finally the end cover 15 is fixed on the spiral groove thrust bearing seat 14 by screws. Therefore, the assembly of the whole air compressor is completed.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A centrifugal air compressor for a hydrogen fuel cell, comprising: the motor comprises a shell assembly (1), a motor stator (12), a motor rotor assembly (2), a radial wave foil bearing assembly, a spiral groove thrust bearing assembly and a volute (112); the motor stator (12) is arranged in the shell (1), and the motor rotor assembly (2) is arranged in the motor stator (12); the radial wave foil bearing assembly is mounted on the housing assembly (1), and the spiral groove thrust bearing assembly is mounted on the housing assembly (1); the volute (112) is connected with the radial foil bearing assembly.
2. The centrifugal air compressor for a hydrogen fuel cell according to claim 1, wherein the housing assembly (1) includes: a housing (11) and an end cap (15); the end cover (15) is arranged at the bottom of the casing (11) and is positioned at one end far away from the volute (112); the motor stator (12) is arranged in a cavity formed by the shell (11) and the end cover (15).
3. The centrifugal air compressor for a hydrogen fuel cell according to claim 2, wherein the motor rotor assembly (2) comprises: an optical axis component, an impeller (22), a thrust disc (26) and a fan (27); the impeller (22) is arranged at one end of the optical axis component close to the volute (112) through an impeller locking nut (21); the fan (27) is arranged at one end of the optical axis component close to the end cover (15) through a fan locking nut (28); the thrust disc (26) is connected with the fan (27) and is arranged at one end, away from the end cover (15), of the fan (27).
4. The centrifugal air compressor for a hydrogen fuel cell according to claim 3, wherein said optical axis assembly includes: an optical axis (25), a magnetic steel (23) and a metal sheath (24); the magnetic steel (23) is installed in the middle of the optical axis (25), and the metal sheath (24) is installed outside the magnetic steel (23).
5. The centrifugal air compressor for a hydrogen fuel cell according to claim 3, wherein said radial wave foil bearing assembly comprises: the bearing comprises a first radial wave foil bearing (19), a second radial wave foil bearing (18), a first radial wave foil bearing seat (111) and a second radial wave foil bearing seat (13), wherein the first radial wave foil bearing (19) is connected with the first radial wave foil bearing seat (111) through a screw, and the second radial wave foil bearing (18) is connected with the second radial wave foil bearing seat (13) through a screw.
6. The centrifugal air compressor for the hydrogen fuel cell according to claim 5, further comprising a labyrinth seal (110), wherein the labyrinth seal (110) is mounted on the first radial corrugated foil bearing seat (111) by screws.
7. The centrifugal air compressor for a hydrogen fuel cell according to claim 5, wherein each of the first radial wave foil bearing (19) and the second radial wave foil bearing (18) includes: a radial wave foil bearing support body (30), a radial wave foil bearing wave foil (31) and a radial wave foil bearing top foil (32); one end of the radial bump foil bearing bump foil (31) is fixed on the radial bump foil bearing support body (30), and the other end of the radial bump foil bearing bump foil is a free end; the radial wave foil bearing top foil (32) is arranged on the radial wave foil bearing wave foil (31), one end of the radial wave foil bearing top foil is fixed on the radial wave foil bearing support body (30), and the other end of the radial wave foil bearing top foil is a free end.
8. The centrifugal air compressor for a hydrogen fuel cell according to claim 5, wherein said spiral groove thrust bearing assembly comprises: a first spiral groove thrust bearing (16), a second spiral groove thrust bearing (17) and a spiral groove thrust bearing seat (14); the first spiral groove thrust bearing (16) and the second spiral groove thrust bearing (17) are symmetrically arranged on two sides of the thrust disc (26); the second spiral groove thrust bearing (17) is connected with the second radial bump foil bearing seat (13) through a screw, and the first spiral groove thrust bearing (16) is connected with the spiral groove thrust bearing seat (14) through a screw.
9. The centrifugal air compressor for a hydrogen fuel cell according to claim 8, wherein each of said first spiral groove thrust bearing (16) and said second spiral groove thrust bearing (17) includes: the spiral groove thrust bearing comprises a spiral groove thrust bearing support body (40), a spiral groove thrust bearing air inlet (41), a spiral groove thrust bearing groove area (42) and a spiral groove thrust bearing dam area (43);
the cross section of the spiral groove thrust bearing supporting body (40) is circular, the spiral groove thrust bearing groove area (42) and the spiral groove thrust bearing dam area (43) are arranged concentrically with the spiral groove thrust bearing supporting body (40), and the inner diameter of the spiral groove thrust bearing dam area (43) is smaller than that of the spiral groove thrust bearing groove area (42); the outer diameter of the spiral groove thrust bearing dam area (43) is equal to the outer diameter of the spiral groove thrust bearing groove area (42); the spiral groove thrust bearing air inlet (41) is positioned at the outer diameter of the spiral groove thrust bearing groove area (42), and the spiral groove thrust bearing groove area (42) and the spiral groove thrust bearing dam area (43) are uniformly distributed at intervals along the circumferential direction; the spiral groove thrust bearing groove area (42) is a groove engraved on the spiral groove thrust bearing dam area (43).
10. The centrifugal air compressor for a hydrogen fuel cell according to claim 9, wherein the depth of said spiral groove thrust bearing groove region (42) is 15 to 35 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210192086.7A CN114526248A (en) | 2022-03-01 | 2022-03-01 | Centrifugal air compressor for hydrogen fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210192086.7A CN114526248A (en) | 2022-03-01 | 2022-03-01 | Centrifugal air compressor for hydrogen fuel cell |
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| CN114526248A true CN114526248A (en) | 2022-05-24 |
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| CN202210192086.7A Pending CN114526248A (en) | 2022-03-01 | 2022-03-01 | Centrifugal air compressor for hydrogen fuel cell |
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| CN113555998A (en) * | 2021-07-29 | 2021-10-26 | 中国船舶重工集团公司第七0七研究所 | Dynamic pressure air-bearing structure with pollution filtering device |
| CN113958520A (en) * | 2021-10-22 | 2022-01-21 | 湖南工程学院 | High-speed centrifugal air compressor for active hydrogen fuel cell vehicle |
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| CN113555998A (en) * | 2021-07-29 | 2021-10-26 | 中国船舶重工集团公司第七0七研究所 | Dynamic pressure air-bearing structure with pollution filtering device |
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Application publication date: 20220524 |