CN215444442U - Fuel cell centrifugal air compressor and fuel cell system - Google Patents
Fuel cell centrifugal air compressor and fuel cell system Download PDFInfo
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- CN215444442U CN215444442U CN202121614326.5U CN202121614326U CN215444442U CN 215444442 U CN215444442 U CN 215444442U CN 202121614326 U CN202121614326 U CN 202121614326U CN 215444442 U CN215444442 U CN 215444442U
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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
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Abstract
The utility model provides a fuel cell centrifugal air compressor and a fuel cell system, relates to the technical field of air compressor equipment, and solves the technical problems of complex structure and large volume of the air compressor caused by an external interstage cooling pipe in the prior art. The fuel cell centrifugal air compressor and the fuel cell system comprise an air compressor body, wherein an interstage pipeline which communicates a primary compression area with a secondary compression area is arranged in a shell of the air compressor body; an air inlet channel is arranged between the interstage pipeline and the motor cavity, an air outlet channel is arranged between the motor cavity and the air suction chamber of the primary compression area, high-pressure gas compressed by the primary compression area can be introduced into the secondary compression assembly through the interstage pipeline, and the high-pressure gas compressed by the primary compression area can enter the motor cavity through the air inlet channel and is discharged into the air suction chamber of the primary compression area through the air outlet channel. The utility model is used for providing the fuel cell centrifugal air compressor and the fuel cell system which have small occupied space and low energy consumption.
Description
Technical Field
The utility model relates to the technical field of air compressor equipment, in particular to a centrifugal air compressor of a fuel cell and a fuel cell system.
Background
In the field of new energy fuel cells, a high-speed motor direct-drive turbine machine is adopted to integrate the motor function and a gear speed-increasing transmission structure, a turbine impeller is directly driven by a high-speed motor main shaft, and a rotor is supported by an air suspension bearing. The high-speed direct-drive centrifugal air compressor is the most advanced product in the current industry.
The new energy fuel cell centrifugal air compressor is applied to new energy automobiles, so strict requirements are imposed on the structure, performance, volume, weight, stability and impact resistance of products.
(1) The fuel cell centrifugal air compressor must be miniaturized as far as possible, is limited by the space limitation of an automobile, occupies a larger using space in the automobile due to an overlarge volume, increases the self weight of the automobile due to a larger mass, and affects the performance of the whole automobile.
(2) The centrifugal air compressor of the fuel cell has to be efficient, different from the traditional internal combustion engine, the tail gas energy of the fuel cell is relatively low, and the output power of the fuel cell stack has larger compressor parasitic power, so the air compressor needs to be operated at high efficiency.
(3) The centrifugal air compressor of the fuel cell has the advantages of simple structure as much as possible and needs impact resistance and high stability of products.
In the working process of the currently common fuel cell centrifugal air compressor, air is introduced from the first stage, compressed air is sent to the second stage through an external inter-stage pipe after being compressed by the first stage, secondary compression is carried out, and then required working condition gas is discharged. The external cooling water cools the motor stator, and external air supply lets in the motor inner chamber with the cooling gas, and the cooling gas flows through the rotor surface, takes away the heat, then flows out from motor casing's opposite side to cooling electric machine rotor and support bearing.
The applicant has found that the prior art has at least the following technical problems:
(1) because the air compressor is provided with the external interstage cooling pipe from the first stage to the second stage, the air compressor is complex in structure, large in size and heavy in mass.
(2) The external interstage cooling pipe is troublesome and labor-consuming to install, easy to damage after being dismantled and maintained, poor in product impact resistance and insufficient in stability.
(3) An external cooling water source is needed to cool the motor, and an external air source is additionally needed to cool the inner cavity of the high-speed motor;
(4) because the clearance between high-speed motor rotor and the stator is very little, the tolerance of the cooling gas of external air supply circulation is limited, and the cooling effect is not obvious, and the small clearance leads to the circulation resistance very big between motor stator and rotor moreover, and whole cooling effect is not good.
(5) The interstage cooling pipe, the water inlet and outlet source pipe and the air inlet and outlet source pipe cause the product structure to be huge, the coordination of the unit is damaged, and the appearance ornamental performance of the compressor is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fuel cell centrifugal air compressor and a fuel cell system, and aims to solve the technical problems of complex structure and large volume of the air compressor caused by an external interstage cooling pipe in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the utility model are described in detail in the following.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a fuel cell centrifugal air compressor, which comprises an air compressor body, wherein an interstage pipeline which communicates a primary compression area and a secondary compression area is arranged in a shell of the air compressor body;
an air inlet channel is arranged between the interstage pipeline and the motor cavity, an air outlet channel is arranged between the motor cavity and the air suction chamber of the primary compression area,
the high-pressure gas compressed by the primary compression area can be introduced into the secondary compression area through the interstage pipeline, and the high-pressure gas compressed by the primary compression area can enter a motor cavity through the gas inlet channel and is discharged into a gas suction chamber of the primary compression area through the gas outlet channel.
Further, the air compressor body also includes a cooler including an inlet, an outlet, and a cooling channel communicating the inlet and the outlet, the cooling channel disposed between the interstage duct and the motor cavity.
Further, the cooling passage is cast on the housing of the air compressor body.
Further, the shell of the air compressor body comprises a first shell, a first-stage volute and a second-stage volute,
a closed motor cavity is arranged in the first shell, and the interstage pipeline is arranged in the first shell; a rotating shaft, a stator and a rotor are arranged in the motor cavity, the rotating shaft is rotatably arranged in the first shell, the stator is connected with the first shell, and the rotor is connected with the rotating shaft;
the improved vortex pump comprises a rotating shaft, and is characterized in that a first-stage impeller is arranged at one end of the rotating shaft, a second-stage impeller is arranged at the other end of the rotating shaft, a first-stage volute is arranged on the first shell on one side of the first-stage impeller, and a second-stage volute is arranged on the first shell on one side of the second-stage impeller.
Further, the cooler is a water-cooling cooler.
Further, the rotating shaft is connected with the first shell through an ultra-high speed air bearing.
Further, the intake passage is located on a side close to the secondary compression region.
Further, the air outlet channel is arranged at the bottom of the side face of the motor cavity.
Further, the air outlet channel comprises an exhaust hole arranged on the first shell and a vent hole arranged on the primary volute, and the exhaust hole is communicated with the vent hole.
A fuel cell system comprising a fuel cell centrifugal air compressor as described above.
The utility model has the beneficial effects that: according to the fuel cell centrifugal air compressor and the fuel cell system provided by the utility model, the interstage pipeline is arranged in the shell of the air compressor and communicates the primary compression region with the secondary compression region, so that the problems of large occupied space and large volume of an external interstage pipe are solved; an air inlet channel is arranged between the interstage pipeline and the motor cavity, and high-pressure low-temperature gas compressed by the primary compression area is conveyed into the motor cavity through the air inlet channel, so that the motor cavity is cooled; then leading the high-temperature cooling gas out of the inner cavity of the motor and entering the suction chamber of the first-stage compression area, compressing again and sequentially completing the self-circulation heat exchange process. In addition, the cooling gas required by the utility model is high-pressure gas compressed by the primary compression area, the density is higher, and the heat exchange effect is good, so that the rotor cooling of the motor chamber can be realized only by a very small amount, the proportion of the required cooling flow to the exhaust flow of the whole centrifugal compressor is very small, and the pressure of the cooled gas is not greatly reduced and can be recycled, so that the corresponding cooling energy consumption is very low.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art external interstage structure;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a top view of the present invention;
fig. 4 is a side view of the present invention.
001 in the figure, the cooler inlet; 002. a cooling water outlet; 003. an external inter-stage pipe; 004. a cooling water inlet; 005. a cooler outlet; 1. a first-stage volute; 2. a first-stage impeller; 3. a rotating shaft; 4. a first housing; 5. a stator; 6. a rotor; 7. an interstage piping; 8. a motor chamber; 9. an air intake passage; 10. a secondary impeller; 11. a second-stage volute; 12. an exhaust hole; 13. a vent hole; 14. a cooler; 15. an inlet; 16. an outlet; 17. a cooling channel.
Detailed Description
The contents of the present invention and the differences between the present invention and the prior art can be understood with reference to fig. 1 to 4 and the text. The utility model will now be described in further detail, including the preferred embodiments, with reference to the accompanying drawings, in which some alternative embodiments of the utility model are shown. It should be noted that: any technical features and any technical solutions in the present embodiment are one or more of various optional technical features or optional technical solutions, and for the sake of brevity, this document cannot exhaustively enumerate all the alternative technical features and alternative technical solutions of the present invention, and is also not convenient for each embodiment of the technical features to emphasize it as one of various optional embodiments, so those skilled in the art should know that: any technical means provided by the utility model can be replaced or any two or more technical means or technical characteristics provided by the utility model can be combined with each other to obtain a new technical scheme. Any technical features and any technical solutions in the present embodiment do not limit the scope of the present invention, and the scope of the present invention should include any alternative technical solutions that can be conceived by those skilled in the art without inventive efforts and new technical solutions that can be obtained by those skilled in the art by combining any two or more technical means or technical features provided by the present invention with each other.
In the description of the present invention, it is to be noted that "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, 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; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The utility model provides a fuel cell centrifugal air compressor and a fuel cell system, which have the advantages of small occupied space and low energy consumption.
The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 4.
The utility model provides a fuel cell centrifugal air compressor, which comprises an air compressor body, wherein an interstage pipeline for communicating a primary compression region with a secondary compression region is arranged in a shell of the air compressor body;
an air inlet channel is arranged between the interstage pipeline and the motor cavity, an air outlet channel is arranged between the motor cavity and the air suction chamber of the primary compression area,
the high-pressure gas compressed by the primary compression area can be introduced into the secondary compression area through the interstage pipeline, and the high-pressure gas compressed by the primary compression area can enter a motor cavity through the gas inlet channel and is discharged into a gas suction chamber of the primary compression area through the gas outlet channel.
According to the fuel cell centrifugal air compressor provided by the utility model, the interstage pipeline is arranged in the shell of the air compressor and communicates the primary compression region with the secondary compression region, so that the problems of large occupied space and large volume of an external interstage pipe are solved; an air inlet channel is arranged between the interstage pipeline and the motor cavity, and high-pressure low-temperature gas compressed by the primary compression area is conveyed into the motor cavity through the air inlet channel, so that the motor cavity is cooled; then leading the high-temperature cooling gas out of the inner cavity of the motor and entering the suction chamber of the first-stage compression area, compressing again and sequentially completing the self-circulation heat exchange process. In addition, the cooling gas required by the utility model is high-pressure gas compressed by the primary compression area, the density is higher, and the heat exchange effect is good, so that the rotor cooling of the motor chamber can be realized only by a very small amount, the proportion of the required cooling flow to the exhaust flow of the whole centrifugal compressor is very small, and the pressure of the cooled gas is not greatly reduced and can be recycled, so that the corresponding cooling energy consumption is very low.
In an alternative embodiment, the air compressor body further comprises a cooler including an inlet, an outlet, and a cooling channel communicating the inlet and the outlet, the cooling channel being disposed between the interstage duct and the motor chamber.
The cooler can cool the inner cavity of the motor and the interstage pipelines simultaneously, so that the inlet air temperature of the secondary compression area is reduced, the pressure ratio efficiency of the secondary compression area is improved, and the efficiency of the whole machine is improved. Meanwhile, a first-stage compression area, a second-stage compression area and an interstage cooler of the high-speed motor direct-driven centrifugal compressor are used as a system, so that the product structure layout is compact, and the impact resistance and the product stability of the product are improved. In addition, cooling gas in the inner cavity of the motor rotor is cooled in a self-circulation mode among the inner cavity of the high-speed motor, the primary compression area, the secondary compression area and the interstage cooler, cooling efficiency is improved, power consumption of the motor is reduced, and an external cooling gas source is not needed.
As an alternative embodiment, the cooling channel is cast on the housing of the air compressor body.
An external interstage cooler is omitted, the cooler is cast on the shell, product parts are reduced, and product integrated design is completed. The cooling channel is cast on the shell, and the external water source can also cool high-temperature and high-pressure gas flowing in the interstage pipeline while cooling the motor, so that the secondary gas inlet temperature is reduced, and the compression efficiency of the whole machine is greatly improved.
In an alternative embodiment, the casing of the air compressor body comprises a first casing, a first-stage volute and a second-stage volute,
a closed motor cavity is arranged in the first shell, and the interstage pipeline is arranged in the first shell; a rotating shaft, a stator and a rotor are arranged in the motor cavity, the rotating shaft is rotatably arranged in the first shell, the stator is connected with the first shell, and the rotor is connected with the rotating shaft;
the improved vortex pump comprises a rotating shaft, and is characterized in that a first-stage impeller is arranged at one end of the rotating shaft, a second-stage impeller is arranged at the other end of the rotating shaft, a first-stage volute is arranged on the first shell on one side of the first-stage impeller, and a second-stage volute is arranged on the first shell on one side of the second-stage impeller.
In an alternative embodiment, the cooler is a water-cooled cooler.
In an alternative embodiment, the shaft is connected to the first housing by an ultra high speed air bearing.
In an alternative embodiment, the intake passage is located on a side near the secondary compression region. The inlet air temperature at one side of the secondary compression area is lower, the lower air source improves the cooling efficiency and reduces the power consumption of the motor.
As an alternative embodiment, the air outlet channel is arranged at the bottom of the side surface of the motor cavity.
In an alternative embodiment, the air outlet channel includes an exhaust hole provided on the first casing and a vent hole provided on the first-stage volute, and the exhaust hole is communicated with the vent hole.
Above-mentioned structure, cyclic utilization cooling gas source secondary compression, one side that the pipe is close to the second grade compression district between the cooling stage reserves inlet channel, be provided with the air vent on the one-level spiral case that is close to the one-level compression district and be provided with the exhaust hole on first casing, be linked together motor chamber and the suction chamber of one-level compression district through outlet channel, cooling gas source after pipe cooling between motor chamber and the cooling stage is linked together through inlet channel, make cooling gas source can cyclic utilization, greatly reduced motor power consumption, accomplish self-loopa cooling.
A fuel cell system comprising a fuel cell centrifugal air compressor as described above.
Example 1:
the utility model provides a fuel cell centrifugal air compressor, which comprises a first shell 4, wherein a motor cavity 8 with a closed structure is arranged on the first shell 4, a rotating shaft 3, a stator 5 and a rotor 6 are arranged in the motor cavity 8, the rotating shaft 3 is rotatably arranged in the motor cavity 8, the stator 5 is connected with the motor cavity 8, and the rotor 6 is connected with the rotating shaft 3;
a primary impeller 2 is arranged at one end of the rotating shaft 3, a primary volute 1 is arranged on the first shell 4 on one side of the primary impeller 2, a secondary impeller 10 is arranged at the other end of the rotating shaft 3, and a secondary volute 11 is arranged on the first shell 4 on one side of the secondary impeller 10;
an interstage pipeline 7 is further arranged on the first shell 4, the interstage pipeline 7 is used for communicating the first-stage compression area with the second-stage compression area, and high-pressure gas compressed by the first-stage compression area can be introduced into the second-stage compression area through the interstage pipeline 7.
An air inlet channel 9 is arranged between the interstage pipeline 7 and the motor chamber 8, an air outlet channel is arranged between the motor chamber 8 and the air suction chamber of the primary compression area, and high-pressure gas compressed by the primary compression area can enter the motor chamber 8 through the air inlet channel 9 and is discharged into the air suction chamber of the primary compression area through the air outlet channel.
The air outlet channel comprises an exhaust hole 12 arranged on the first shell 4 and a vent hole 13 arranged on the first-stage volute 1, and the exhaust hole 12 is communicated with the vent hole 13.
Further, a cooler 14 is also provided on the first housing 4, the cooler 14 comprising an inlet 15, an outlet 16 and a cooling channel 17 communicating the inlet 15 and the outlet 16, the cooling channel 17 being provided between the interstage duct 7 and the motor chamber 8.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A fuel cell centrifugal air compressor is characterized by comprising an air compressor body, wherein an interstage pipeline which communicates a primary compression area with a secondary compression area is arranged in a shell of the air compressor body;
an air inlet channel is arranged between the interstage pipeline and the motor cavity, and an air outlet channel is arranged between the motor cavity and an air suction chamber of the primary compression area;
the high-pressure gas compressed by the primary compression area can be introduced into the secondary compression area through the interstage pipeline, and the high-pressure gas compressed by the primary compression area can enter a motor cavity through the gas inlet channel and is discharged into a gas suction chamber of the primary compression area through the gas outlet channel.
2. The fuel cell centrifugal air compressor of claim 1, wherein the air compressor body further comprises a cooler including an inlet, an outlet, and a cooling channel communicating the inlet and the outlet, the cooling channel being disposed between the interstage duct and the motor chamber.
3. The fuel cell centrifugal air compressor of claim 2, wherein said cooling passages are cast into the housing of said air compressor body.
4. The fuel cell centrifugal air compressor as claimed in any one of claims 1 to 3, wherein the housing of the air compressor body includes a first housing, a primary volute and a secondary volute,
a closed motor cavity is arranged in the first shell, and the interstage pipeline is arranged in the first shell; a rotating shaft, a stator and a rotor are arranged in the motor cavity, the rotating shaft is rotatably arranged in the first shell, the stator is connected with the first shell, and the rotor is connected with the rotating shaft;
the improved vortex pump comprises a rotating shaft, and is characterized in that a first-stage impeller is arranged at one end of the rotating shaft, a second-stage impeller is arranged at the other end of the rotating shaft, a first-stage volute is arranged on the first shell on one side of the first-stage impeller, and a second-stage volute is arranged on the first shell on one side of the second-stage impeller.
5. The fuel cell centrifugal air compressor of claim 2, wherein the cooler is a water-cooled cooler.
6. The fuel cell centrifugal air compressor as claimed in claim 4, wherein the rotary shaft is connected to the first housing through an ultra high speed air bearing.
7. The fuel cell centrifugal air compressor of claim 1, wherein said intake passage is located on a side adjacent to said secondary compression zone.
8. The fuel cell centrifugal air compressor of claim 1, wherein the air outlet channel is disposed at a bottom of a side surface of the motor chamber.
9. The fuel cell centrifugal air compressor of claim 4, wherein the air outlet channel includes an air outlet hole disposed on the first housing and a vent hole disposed on the first-stage volute, the air outlet hole being in communication with the vent hole.
10. A fuel cell system characterized by comprising the fuel cell centrifugal air compressor according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121614326.5U CN215444442U (en) | 2021-07-15 | 2021-07-15 | Fuel cell centrifugal air compressor and fuel cell system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121614326.5U CN215444442U (en) | 2021-07-15 | 2021-07-15 | Fuel cell centrifugal air compressor and fuel cell system |
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| Publication Number | Publication Date |
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| CN215444442U true CN215444442U (en) | 2022-01-07 |
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| CN202121614326.5U Active CN215444442U (en) | 2021-07-15 | 2021-07-15 | Fuel cell centrifugal air compressor and fuel cell system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335968A (en) * | 2023-03-27 | 2023-06-27 | 广州汽车集团股份有限公司 | Air compressor and fuel cell |
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2021
- 2021-07-15 CN CN202121614326.5U patent/CN215444442U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335968A (en) * | 2023-03-27 | 2023-06-27 | 广州汽车集团股份有限公司 | Air compressor and fuel cell |
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