Hydrogen circulating pump with high-performance runner

Abstract

The invention belongs to the technical field of proton exchange membrane fuel cells, and relates to a hydrogen circulating pump with a high-performance runner. The area of the first cross section of the first shell flow channel (13) after the section of the initial air inlet (12) is removed is S1, the area of the last cross section of the first shell flow channel (13) before the section of the final air outlet (13) is S2, the area of the cross section of the air inlet (12) is S12, the area of the cross section of the air outlet (13) is S13, and S12 and S1 meet the following relational expression: S12 = 1.05-1.3 * n * S1; s13 and S2 meet the following relational expression: S13 = (0.8-1.05) * n * S2; wherein n is equal to 1 when a single-side flow channel is used, and n is equal to 2 when a double-side flow channel is used. According to the hydrogen circulating pump with the high-performance flow channel, the flow channel has a linear AR ratio, so that under the condition that the overall shape of the circulating pump is slightly changed, the gas flow can be increased, the pressure ratio of the hydrogen pump is increased, the flow loss is reduced, the efficiency of the hydrogen pump is improved, and the performance of the hydrogen circulating pump is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of proton exchange membrane fuel cells, and more specifically, relates to a hydrogen circulation pump with a high-performance flow channel. Background Art

[0002] The hydrogen circulation pump is one of the core components of the proton exchange membrane fuel cell (PEMFC) engine. The pressure regulation, drainage, exhaust and humidification of the fuel cell hydrogen supply system have an important impact on improving the performance and life of the proton exchange membrane fuel cell. The core component of the hydrogen supply system is the hydrogen circulation pump. The hydrogen at the tail exhaust end of the fuel cell stack is re-pressurized to the inlet end of the fuel cell stack through the hydrogen circulation pump, realizing the recycling of hydrogen. The hydrogen circulation pump generally includes a pump head and a motor. The pump head generally has double-sided flow channels and single-sided flow channels. The double-sided flow channel pump head includes a first shell (upper shell), a second shell (lower shell) and an impeller. The single-sided flow channel pump head includes a first shell (upper shell), a second shell (lower shell) and an impeller. The pump head of the hydrogen pump only has the upper shell and the impeller; the flow channel and the impeller on the shell form a chamber for compressing the gas; the main feature is that the motor drives the impeller to rotate, and the gas enters the air cavity from the inlet, and on the one hand, it performs circular motion under the radial rotation of the impeller; on the other hand, it moves tangentially along the outer edge of the impeller under the action of centrifugal force to the flow channel, and then enters the impeller from the inner diameter of the flow channel; this movement is repeated many times, and finally flows out from the outlet; the flow channel is the main chamber for carrying gas flow, and it bears the role of compressing the air flow to a certain extent. The volume of the flow channel chamber is directly related to the maximum flow rate of the entire hydrogen pump, and the shape of the flow channel is also an important part of the hydrogen pump structure. In the existing design, the flow channel is used in the circumferential direction. Although there will be processing convenience, it also loses some performance; with the development of fuel cell vehicles, the output power of fuel cell reactors is further improved, requiring hydrogen pumps to have higher flow, greater pressure rise, and smaller external volume, which poses new challenges to designers and has defects that need to be improved.

[0003] In the prior art, there is a technology named "a fuel cell hydrogen circulation pump" and the publication (announcement) number is "CN115492781A", which relates to a fuel cell hydrogen circulation pump, wherein the center of the bottom end surface of the inner cavity of the compression shell is downwardly arranged with first, second and third cylindrical countersunk holes with gradually decreasing circumferences, the shaft comprises a lower shaft section, an intermediate disk seat and an upper shaft section, the lower shaft section is fitted in the third cylindrical countersunk hole, the intermediate disk seat is supported and fixed on the bottom end surface of the second cylindrical countersunk hole, the upper shaft section is sleeved with upper and lower bearings at an outer gap, the upper and lower bearings are interference fit in the magnet sleeve, a magnet is arranged at the upper end of the magnet sleeve, a balancing disk is connected to the lower end of the magnet sleeve by bolts, an impeller is pressed between the sleeve and the balancing disk, the impeller is supported on the bottom end surface of the inner cavity of the compression shell, an incompletely circumferential compression shell flow channel is arranged on the bottom end surface of the inner cavity of the compression shell, the two ends of the compression shell flow channel are connected to the compression shell to set the flow channel inlet and outlet, and a circle of impeller flow channel corresponding to the compression shell flow channel is arranged on the lower end surface of the impeller. The pump effectively takes into account the internal transmission strength and the compact size of the whole package, effectively reduces vibration transmission noise, ensures the transmission power, and prevents deformation during long-term operation. This technology does not involve the technical problems and technical solutions of this application. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in view of the deficiencies in the prior art, a hydrogen circulation pump with a simple structure and a flow channel having a linear AR ratio is provided, so that the gas flow rate can be increased while the hydrogen pump pressure ratio is increased, the flow loss is reduced, the hydrogen pump efficiency is increased, and the performance of the hydrogen circulation pump is improved.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0006] The present invention is a hydrogen circulation pump with a high-performance flow channel. An impeller is arranged between a first shell and a second shell of the hydrogen circulation pump. A first shell flow channel is arranged on the inner wall of the first shell. The first shell flow channel starts from the air inlet position and ends at the air outlet position. A number of evenly distributed cross sections are taken in the first shell flow channel, the cross-sectional area is A, the cross-sectional centroid radius is R, and k=A / R is taken. The k value is the AR ratio. The angle of the cross section of the first shell flow channel is taken as the abscissa, and the AR ratio of the first shell flow channel is taken as the ordinate. There is a linear relationship between the cross-sectional angle and the AR ratio. , the slope is a constant; the first cross-sectional area of ​​the first shell flow channel excluding the cross-sectional area of ​​the starting air inlet is S1, the last cross-sectional area of ​​the first shell flow channel excluding the cross-sectional area of ​​the ending air outlet is S2, the cross-sectional area of ​​the air inlet is S12, and the cross-sectional area of ​​the air outlet is S13, then S12 and S1 satisfy the following relationship: S12=1.05~1.3*n*S1; S13 and S2 satisfy the following relationship: S13=0.8~1.05*n*S2; wherein: n=1 for single-sided flow channel, and n=2 for double-sided flow channel.

[0007] The second shell inner wall is provided with a second shell flow channel, which starts from the position aligned with the air inlet and ends at the position aligned with the air outlet. A number of evenly distributed cross sections are taken in the second shell flow channel, the cross-sectional area is A, the cross-sectional centroid radius is R, and k=A / R is taken, where the k value is the AR ratio. The angle at which the cross section of the second shell flow channel is located is taken as the horizontal coordinate, and the AR ratio of the second shell flow channel is taken as the vertical coordinate. There is a linear relationship between the cross-sectional angle and the AR ratio, and the slope is a constant.

[0008] The first shell flow channel is in a C-shaped structure, and a first blocking portion is provided on the first shell flow channel. The first shell flow channel portion on one side of the first blocking portion is aligned with the air inlet, and the first shell flow channel portion on the other side of the first blocking portion is aligned with the air outlet.

[0009] The second shell flow channel is in a C-shaped structure, and a second blocking portion is provided on the second shell flow channel.

[0010] The first blocking portion is located between the air inlet and the air outlet.

[0011] An air inlet and an air outlet are arranged on the outer side of the first shell.

[0012] The first shell and the second shell are connected by a plurality of bolts, and a sealing gasket is arranged between the first shell and the second shell.

[0013] The impeller is connected to the first shell and the second shell via a rotating shaft, and the rotating shaft is connected to a driving motor.

[0014] The cross-sections of the first shell flow channel include 0° cross-section, 30° cross-section, 60° cross-section, 90° cross-section, 120° cross-section, 150° cross-section, 180° cross-section, 210° cross-section, 240° cross-section, 270° cross-section, and 300° cross-section.

[0015] The cross-sections of the second shell flow channel include 0° cross-section, 30° cross-section, 60° cross-section, 90° cross-section, 120° cross-section, 150° cross-section, 180° cross-section, 210° cross-section, 240° cross-section, 270° cross-section, and 300° cross-section.

[0016] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0017] The hydrogen circulation pump with high-performance flow channel described in the present invention is structurally arranged. When the circulation pump is required to have a single-sided flow channel structure, the first shell flow channel is arranged on the inner wall of the first shell, and the structure of the first shell flow channel is limited, and only one shell is provided with a flow channel. In this way, the first shell flow channel of the circulation pump has a linear AR ratio, and the flow channel with a linear AR ratio has high performance, and the cross-section has a corresponding relationship, which can improve the flow rate and pressure ratio, improve the insulation efficiency, and improve the performance with a small change in the shape, ensuring that the hydrogen pump pressure ratio is improved while increasing the flow rate, reducing flow losses, and improving the efficiency of the hydrogen pump. When the circulation pump is required to have a double-sided flow channel structure, the second shell flow channel is arranged on the inner wall of the second shell, and the structure of the second shell flow channel is limited. In this way, the second shell flow channel of the circulation pump has a linear AR ratio. The second shell flow channel with a linear AR ratio cooperates with the first shell flow channel. The first shell flow channel and the second shell flow channel are symmetrically arranged to form a flow channel with high performance, and the cross sections have a corresponding relationship. The flow rate and pressure ratio can be effectively improved, the insulation efficiency can be improved, and the performance can be improved with a small change in the appearance, ensuring that the pressure ratio of the hydrogen pump is increased while the flow rate is increased, reducing flow losses, and improving the efficiency of the hydrogen circulation pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 It is a schematic diagram of the explosion structure of the hydrogen circulation pump with high-performance flow channel according to the present invention;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of the hydrogen circulation pump with high-performance flow channel according to the present invention;

[0021] Figure 3 It is a schematic structural diagram of the first shell flow channel of the hydrogen circulation pump with high-performance flow channel according to the present invention;

[0022] Figure 4 It is a schematic structural diagram of the second shell flow channel of the hydrogen circulation pump with high-performance flow channel according to the present invention;

[0023] Figure 5 A curve diagram showing the relationship between the AR ratio and the angle of the hydrogen circulation pump with a high-performance flow channel according to the present invention;

[0024] Marked in the accompanying drawings are: 1, first shell; 11, first shell flow channel; 12, air inlet; 13, air outlet; 14, first blocking part; 2, impeller; 21, rotating shaft; 3, second shell; 31, second shell flow channel; 32, second blocking part. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various components involved, the function and working principle of each part, etc., through the description of the embodiments with reference to the accompanying drawings:

[0026] As attached Figure 1 -Attached Figure 5As shown, the present invention is a hydrogen circulation pump with a high-performance flow channel. An impeller 2 is arranged between a first shell 1 and a second shell 3 of the hydrogen circulation pump. A first shell flow channel 13 is arranged on the inner wall of the first shell 1. The first shell flow channel 11 starts from the position of the air inlet 12 and ends at the position of the air outlet 13. A number of uniformly distributed cross sections are taken in the first shell flow channel 11, the cross-sectional area is A, the cross-sectional centroid radius is R, and k=A / R is taken. The k value is the AR ratio. The angle of the cross section of the first shell flow channel 11 is taken as the horizontal coordinate, and the AR ratio of the first shell flow channel 11 is taken as the vertical coordinate. There is a relationship between the cross-sectional angle and the AR ratio. In a linear relationship, the slope is a constant; the first cross-sectional area of ​​the first shell flow channel 13 after excluding the cross-sectional area of ​​the starting air inlet 12 is S1, the last cross-sectional area of ​​the first shell flow channel 13 before excluding the cross-sectional area of ​​the ending air outlet 13 is S2, the cross-sectional area of ​​the air inlet 12 is S12, and the cross-sectional area of ​​the air outlet 13 is S13, then S12 and S1 satisfy the following relationship: S12 = 1.05 ~ 1.3 * n * S1; S13 and S2 satisfy the following relationship: S13 = 0.8 ~ 1.05 * n * S2; wherein: n = 1 for a single-sided flow channel, and n = 2 for a double-sided flow channel. The above structure proposes an improved technical solution to address the deficiencies in the prior art. In the structural setting, when the circulating pump is required to be a single-sided flow channel structure, the first shell flow channel 11 is set on the inner wall of the first shell 1, and the structure of the first shell flow channel 11 is limited. Specifically, an air inlet and an air outlet are arranged on the outside of the first shell, and the first shell flow channel 11 starts from the position of the air inlet 12 and ends at the position of the air outlet 13. A number of evenly distributed cross sections are taken in the first shell flow channel 11, the cross-sectional area is A, the cross-sectional radius is R, and k=A / R is taken, where the k value is the AR ratio; the angle at which the cross section of the first shell flow channel 11 is located is taken as the horizontal coordinate, and the AR ratio of the first shell flow channel 11 is taken as the vertical coordinate. There is a linear relationship between the cross-sectional angle and the AR ratio, and the slope is a constant; the first shell flow channel 13 is excluding the opening The first cross-sectional area after the cross-sectional area of ​​the air inlet 12 at the beginning is S1, the last cross-sectional area before the cross-sectional area of ​​the air outlet 13 at the end of the first shell flow channel 13 is S2, the cross-sectional area of ​​the air inlet 12 is S12, and the cross-sectional area of ​​the air outlet 13 is S13, then S12 and S1 satisfy the following relationship: S12 = 1.05 ~ 1.3 * n * S1; - S13 and S2 satisfy the following relationship: S13 = 0.8 ~ 1.05 * n * S2; where: n = 1 for a single-sided flow channel, and n = 2 for a double-sided flow channel. In this way, the first shell flow channel 11 of the circulation pump has a linear AR ratio, and the flow channel with a linear AR ratio has high performance, and the cross-section has a corresponding relationship, which can improve the flow rate and pressure ratio, improve the insulation efficiency, and improve the performance with a small change in the shape, ensuring that the hydrogen pump pressure ratio is increased while the flow rate is increased, reducing flow losses, and improving the efficiency of the hydrogen pump.The hydrogen circulation pump with a high-performance flow channel described in the present invention has a simple structure and a linear AR ratio of the flow channel, so that the gas flow rate can be increased while the overall shape of the circulation pump changes slightly, while the hydrogen pump pressure ratio is increased, the flow loss is reduced, the hydrogen pump efficiency is increased, and the performance of the hydrogen circulation pump is improved.

[0027] The second shell flow channel 31 is arranged on the inner wall of the second shell 3. The second shell flow channel 31 starts from the position aligned with the air inlet 12 and ends at the position aligned with the air outlet 13. Several uniformly distributed cross sections are taken in the second shell flow channel 31, the cross-sectional area is A, the radius of the cross-sectional centroid is R, and k=A / R is taken, and the k value is the AR ratio; the angle of the cross section of the second shell flow channel 31 is taken as the horizontal coordinate, and the AR ratio of the second shell flow channel 31 is taken as the vertical coordinate. There is a linear relationship between the cross-sectional angle and the AR ratio, and the slope is a constant. In the above structure, when the circulation pump needs to be a double-sided flow channel structure, the second shell flow channel 31 is arranged on the inner wall of the second shell 3, and the structure of the second shell flow channel 31 is limited. In this way, the second shell flow channel 31 of the circulation pump has a linear AR ratio. The second shell flow channel with a linear AR ratio cooperates with the first shell flow channel. The first shell flow channel and the second shell flow channel are symmetrically arranged to form a flow channel with high performance, and the cross sections have a corresponding relationship. The flow rate and pressure ratio can be effectively improved, the insulation efficiency can be improved, and the performance can be improved with a small change in the appearance, ensuring that the pressure ratio of the hydrogen pump is increased while the flow rate is increased, reducing flow losses, and improving the efficiency of the hydrogen pump.

[0028] The principle that the flow channel with a linear AR ratio and a corresponding cross-section in the structure of the present invention can improve performance is that the flow channel shape of the structure can guide the gas to enter the impeller at a more uniform speed and direction, reduce local airflow separation and irregular vortices, and improve the efficiency of the hydrogen pump; as the flow channel cross-section gradually decreases, the gas flow rate will gradually increase, the speed at which the gas enters the impeller increases, and under the action of the centrifugal force of the high-speed rotation of the impeller, the gas is thrown to the outer edge of the impeller and compressed by the flow channel again, so that the gas obtains greater kinetic energy, thereby improving the pressure ratio of the hydrogen pump.

[0029] The first shell flow channel 11 is a C-shaped structure, and the first shell flow channel 11 is provided with a first blocking portion 14. The first shell flow channel 11 on one side of the first blocking portion 14 is aligned with the air inlet 12, and the first shell flow channel 11 on the other side of the first blocking portion 14 is aligned with the air outlet 13. The second shell flow channel 31 is a C-shaped structure, and the second shell flow channel 31 is provided with a second blocking portion 32. The first blocking portion 14 is located between the air inlet 12 and the air outlet 13. In the above structure, the first shell flow channel 11 is not an annular structure, and is blocked by the first blocking portion 14, and is a C-shaped structure. One end of the first shell flow channel 11 is aligned with the air inlet 12, and the other end of the first shell flow channel 11 is aligned with the air outlet 13. The second shell flow channel 31 is not an annular structure, and is blocked by the second blocking portion 32, and is a C-shaped structure. The first shell flow channel and the second shell flow channel are arranged symmetrically. After the first shell and the second shell are connected, the first shell flow channel 11 and the second shell flow channel 13 form a flow channel. Ensure that the gas in the flow channel moves in a circular motion under the action of the impeller 2.

[0030] The outer side of the first shell 1 is provided with an air inlet 12 and an air outlet 13. In the above structure, the air inlet 12 is used for gas to enter, and the air outlet 13 is used for gas to flow out. The flow channel can be provided only on the first shell 1, which is a single-sided flow channel, or it can be provided on the first shell 1 and the second shell 3 respectively, which is a double-sided flow channel. In the case of a double-sided flow channel, after the first shell 1 and the second shell 3 are connected, the first shell flow channel 11 and the second shell flow channel 13 are symmetrically arranged to ensure the passage of gas.

[0031] The first shell 1 and the second shell 3 are connected by a plurality of bolts, and a sealing gasket is arranged between the first shell 1 and the second shell 3. In the above structure, the first shell 1 and the second shell 3 are fixedly connected by bolts, and the sealing gasket is clamped between the first shell 1 and the second shell 3, so as to improve the sealing performance of the working cavity between the first shell 1 and the second shell 3.

[0032] The impeller 2 is connected to the first housing 1 and the second housing 3 via a rotating shaft 21, and the rotating shaft 21 is connected to the driving motor. In the above structure, the driving motor drives the impeller to rotate via the rotating shaft.

[0033] The cross sections of the first shell flow channel 11 include 0° cross section, 30° cross section, 60° cross section, 90° cross section, 120° cross section, 150° cross section, 180° cross section, 210° cross section, 240° cross section, 270° cross section, and 300° cross section. The above structure, based on the circumferential structure formed by the first shell 1, divides the first shell flow channel into equal parts to form cross sections at different angles.

[0034] The cross-sections of the second shell flow channel 31 include 0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, and 300°. The above structure divides the first shell flow channel into equal parts based on the circumferential structure formed by the second shell 2 to form cross-sections at different angles. The angles of division and the number of divided cross-sections of the second shell 2 are exactly the same as those of the first shell 1.

[0035] The hydrogen circulation pump with high-performance flow channel described in the present invention is structurally arranged. When the circulation pump is required to have a single-sided flow channel structure, the first shell flow channel 11 is arranged on the inner wall of the first shell 1, and the structure of the first shell flow channel 11 is limited, and only one shell is provided with a flow channel. In this way, the first shell flow channel 11 of the circulation pump has a linear AR ratio, and the flow channel with a linear AR ratio has high performance, and the cross-section has a corresponding relationship, which can improve the flow rate and pressure ratio, improve the insulation efficiency, and improve the performance with a small change in the shape, ensuring that the hydrogen pump pressure ratio is improved while the flow rate is increased, reducing flow losses, and improving the efficiency of the hydrogen pump. When the circulation pump is required to have a double-sided flow channel structure, the second shell flow channel 31 is arranged on the inner wall of the second shell 3, and the structure of the second shell flow channel 31 is limited. In this way, the second shell flow channel 31 of the circulation pump has a linear AR ratio. The second shell flow channel with a linear AR ratio cooperates with the first shell flow channel. The first shell flow channel and the second shell flow channel are symmetrically arranged to form a flow channel with high performance, and the cross sections have a corresponding relationship. The flow rate and pressure ratio can be effectively improved, the insulation efficiency can be improved, and the performance can be improved with a small change in the appearance, ensuring that the hydrogen pump pressure ratio is increased while the flow rate is increased, reducing flow losses, and improving the efficiency of the hydrogen circulation pump.

[0036] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A hydrogen circulation pump with a high-performance flow channel, characterized in that: The first shell flow channel (13) is arranged on the inner wall of the first shell (1), the first shell flow channel (11) starts from the air inlet (12) and ends at the air outlet (13), a number of evenly distributed cross sections are taken in the first shell flow channel (11), the cross section area is A, the cross section centroid radius is R, k=A / R, and the k value is the AR ratio; the angle of the cross section of the first shell flow channel (11) is taken as the horizontal coordinate, and the AR ratio of the first shell flow channel (11) is taken as the vertical coordinate, there is a linear relationship between the cross section angle and the AR ratio, and the slope is a constant value; the first shell flow channel (13) The first cross-sectional area after excluding the cross-sectional area of ​​the starting air inlet (12) is S1, the last cross-sectional area before excluding the cross-sectional area of ​​the ending air outlet (13) of the first shell flow channel (13) is S2, the cross-sectional area of ​​the air inlet (12) is S12, and the cross-sectional area of ​​the air outlet (13) is S13, then S12 and S1 satisfy the following relationship: S12 = 1.05 ~ 1.3*n*S1; S13 and S2 satisfy the following relationship: S13 = 0.8 ~ 1.05*n*S2; wherein: n = 1 for a single-sided flow channel, and n = 2 for a double-sided flow channel.

2. The hydrogen circulation pump with high-performance flow channel according to claim 1, characterized in that: The inner wall of the second shell (3) is provided with a second shell flow channel (31), the second shell flow channel (31) starts from a position aligned with the air inlet (12) and ends at a position aligned with the air outlet (13), a number of evenly distributed cross sections are taken in the second shell flow channel (31), the cross-sectional area is A, the cross-sectional centroid radius is R, and k=A / R is taken, where the k value is the AR ratio; the angle at which the cross section of the second shell flow channel (31) is located is taken as the horizontal coordinate, and the AR ratio of the second shell flow channel (31) is taken as the vertical coordinate, and there is a linear relationship between the cross-sectional angle and the AR ratio, and the slope is a constant value.

3. The hydrogen circulation pump with a high-performance flow channel according to claim 1 or 2, characterized in that: The first shell flow channel (11) is in a C-shaped structure. The first shell flow channel (11) is provided with a first blocking portion (14). A portion of the first shell flow channel (11) on one side of the first blocking portion (14) is aligned with the air inlet (12), and a portion of the first shell flow channel (11) on the other side of the first blocking portion (14) is aligned with the air outlet (13).

4. The hydrogen circulation pump with high-performance flow channel according to claim 2, characterized in that: The second shell flow channel (31) is in a C-shaped structure, and the second shell flow channel (31) is provided with a second blocking portion (32).

5. The hydrogen circulation pump with high-performance flow channel according to claim 3, characterized in that: The first blocking portion (14) is located between the air inlet (12) and the air outlet (13).

6. The hydrogen circulation pump with high-performance flow channel according to claim 3, characterized in that: An air inlet (12) and an air outlet (13) are arranged on the outer side of the first shell (1).

7. The hydrogen circulation pump with a high-performance flow channel according to claim 1 or 2, characterized in that: The first shell (1) and the second shell (3) are connected by a plurality of bolts, and a sealing gasket is arranged between the first shell (1) and the second shell (3).

8. The hydrogen circulation pump with a high-performance flow channel according to claim 1 or 2, characterized in that: The impeller (2) is connected to the first housing (1) and the second housing (3) via a rotating shaft (21), and the rotating shaft (21) is connected to a driving motor.

9. The hydrogen circulation pump with a high-performance flow channel according to claim 1 or 2, characterized in that: The cross sections of the first shell flow channel (11) include a 0° cross section, a 30° cross section, a 60° cross section, a 90° cross section, a 120° cross section, a 150° cross section, a 180° cross section, a 210° cross section, a 240° cross section, a 270° cross section, and a 300° cross section.

10. The hydrogen circulation pump with high-performance flow channel according to claim 2, characterized in that: The cross-sections of the second shell flow channel (31) include 0° cross-section, 30° cross-section, 60° cross-section, 90° cross-section, 120° cross-section, 150° cross-section, 180° cross-section, 210° cross-section, 240° cross-section, 270° cross-section and 300° cross-section.

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