A hydrogen circulation pump with high-performance flow channel

Abstract

The present invention belongs to the technical field of proton exchange membrane fuel cells and is a hydrogen circulation pump with a high-performance flow channel. 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, and 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 hydrogen circulation pump with a high-performance flow channel of the present invention has a linear AR ratio of the flow channel, 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 improved, and the performance of the hydrogen circulation pump is improved under the condition that the overall shape of the circulation pump changes little.

Description

Technical Field

[0001] The present invention belongs to the technical field of proton exchange membrane fuel cells, and more particularly, 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 functions 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 consists of only the upper housing and impeller. The flow channel and impeller on the housing form a chamber for compressing gas. Its main features are: the motor drives the impeller to rotate, and gas enters the chamber from the inlet. On the one hand, it undergoes a circular motion due to the radial rotation of the impeller. On the other hand, under the action of centrifugal force, it moves tangentially along the outer edge of the impeller to the flow channel, and then enters the impeller from the inner diameter of the flow channel. This motion is repeated multiple times before finally flowing out of the outlet. The flow channel is the main chamber that carries the gas flow and plays a certain role in compressing the air flow. 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 a critical part of the hydrogen pump structure. In existing designs, the flow channel adopts a method with equal cross-section in the circumferential direction. Although this method improves processing convenience, it also reduces some performance. With the development of fuel cell vehicles, the output power of fuel cell reactors has been further improved, requiring hydrogen pumps to have higher flow rates, greater pressure rise, and a smaller external volume. This poses new challenges for 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 with a publication (announcement) number of "CN115492781A". This technology relates to a fuel cell hydrogen circulation pump. The center of the bottom end surface of the compression shell inner cavity is sequentially provided with first, second and third cylindrical countersunk holes with gradually decreasing circumferences downward. The shaft includes a lower shaft section, an intermediate disk seat and an upper shaft section. The lower shaft section is fitted into 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 and lower bearings are sleeved in the outer gap of the upper shaft section. The upper and lower bearings are interference fit in the magnet sleeve. A magnet is provided at the upper end of the magnet sleeve. A balancing disk is connected to the lower end of the magnet sleeve via bolts. An impeller is pressed between the sleeve and the balancing disk. The impeller is supported on the bottom end surface of the compression shell inner cavity. A compression shell flow channel with an incomplete circumference is provided on the bottom end surface of the compression shell inner cavity. The two ends of the compression shell flow channel are connected to the compression shell to set the flow channel inlet and outlet. The lower end surface of the impeller is provided with an impeller flow channel corresponding to the compression shell flow channel. 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 shortcomings of the existing technology, a hydrogen circulation pump with a simple structure and a flow channel with a linear AR ratio is provided, so that the gas flow rate can be increased while the overall shape of the circulation pump changes little, while the hydrogen pump pressure ratio is improved, the flow loss is reduced, the hydrogen pump efficiency is improved, and the performance of the hydrogen circulation pump is enhanced.

[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 rate is a constant; the first cross-sectional area of ​​the first shell flow channel excluding the cross-sectional area of ​​the air inlet at the beginning is S1, the last cross-sectional area of ​​the first shell flow channel excluding the cross-sectional area of ​​the air outlet at the end 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; where: n=1 for single-sided flow channel, n=2 for double-sided flow channel.

[0007] A second shell flow channel is provided on the inner wall of the second shell. The second shell flow channel starts from the position aligned with the air inlet and ends at the position aligned with the air outlet. Several 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 of the cross section of the second shell flow channel is used as the horizontal coordinate, and the AR ratio of the second shell flow channel is used 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. 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 provided 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 the 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 channels described in the present invention is structurally arranged such that, when the circulation pump is required to have a single-sided flow channel structure, a 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-sections have a corresponding relationship, which can increase the flow rate and pressure ratio, improve the thermal insulation efficiency, and improve the performance with a small change in the shape, ensuring that the hydrogen pump pressure ratio is increased 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, a 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. It can effectively improve the flow rate and pressure ratio, improve the insulation efficiency, and improve the performance 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. 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 This 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 This is a schematic cross-sectional view of the hydrogen circulation pump with a high-performance flow channel according to the present invention;

[0021] Figure 3 This 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 This 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 graph 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 describes the embodiments with reference to the accompanying drawings to further explain in detail the specific embodiments of the present invention, such as the shapes, structures, mutual positions and connection relationships between the various components involved, the functions and working principles of the various components.

[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 provided between a first shell 1 and a second shell 3 of the hydrogen circulation pump. A first shell flow channel 11 is provided 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. Several uniformly distributed sections are taken in the first shell flow channel 11, with a cross-sectional area of ​​A and a cross-sectional centroid radius of R. k=A / R is taken, 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-sectional angle and the AR ratio. The slope is a constant value; the first cross-sectional area of ​​the first shell flow channel 11 after excluding the cross-sectional area of ​​the air inlet 12 at the beginning is S1, the last cross-sectional area of ​​the first shell flow channel 11 before excluding the cross-sectional area of ​​the air outlet 13 at the end 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. The above structure proposes an improved technical solution to address the shortcomings of the existing technology. When the structural setting is required, when the circulating pump is required to have 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 provided 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. Several uniformly distributed cross sections are taken in the first shell flow channel 11, with a cross-sectional area of ​​A and a cross-sectional radius of R, and k=A / R, where 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-sectional angle and the AR ratio, and the slope is a constant. The first cross-sectional area of ​​the first shell flow channel 11 after excluding the cross section of the starting air inlet 12 is S1, and the last cross-sectional area of ​​the first shell flow channel 11 before excluding the cross section 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; where n = 1 for a single-sided flow passage and n = 2 for a double-sided flow passage. This allows the first casing flow passage 11 of the circulating pump to have a linear AR ratio. A flow passage with a linear AR ratio offers high performance, and a corresponding relationship between cross-sections can improve flow rate and pressure ratio, enhancing thermal insulation efficiency. This allows for improved performance with minimal changes to the external shape, ensuring an increase in both flow rate and pressure ratio, reducing flow losses, and improving hydrogen pump efficiency.The hydrogen circulation pump with a high-performance flow channel described in the present invention has a simple structure and the flow channel has a linear AR ratio, so that the gas flow rate can be increased while the overall shape of the circulation pump changes little, while the hydrogen pump pressure ratio is improved, the flow loss is reduced, the hydrogen pump efficiency is improved, and the performance of the hydrogen circulation pump is enhanced.

[0027] The inner wall of the second shell 3 is provided with a second shell flow channel 31. The second shell flow channel 31 starts at a position aligned with the air inlet 12 and ends at a position aligned with the air outlet 13. Several evenly distributed cross-sections are taken in the second shell flow channel 31, with a cross-sectional area of ​​A and a cross-sectional centroid radius of R. The k value is calculated as k = A / R, where the AR ratio is the value of k. The angle of the cross section of the second shell flow channel 31 is used as the horizontal coordinate, and the AR ratio of the second shell flow channel 31 is used as the vertical coordinate. There is a linear relationship between the cross-sectional angle and the AR ratio, with a constant slope. In the above structure, when a double-sided flow channel structure is required for the circulating pump, the second shell flow channel 31 is provided on the inner wall of the second shell 3, and the structure of the second shell flow channel 31 is defined. 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. It can effectively improve the flow rate and pressure ratio, improve the insulation efficiency, and improve the performance 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 pump.

[0028] The principle by which 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 shape of the flow channel of the structure can guide the gas into 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 cross-section of the flow channel gradually decreases, the gas flow rate will gradually increase, and the speed at which the gas enters the impeller will increase. Under the action of the centrifugal force of the high-speed rotation of the impeller, the gas is thrown toward the outer edge of the impeller and compressed again by the flow channel, so that the kinetic energy obtained by the gas is greater, thereby improving the pressure ratio of the hydrogen pump.

[0029] The first shell flow channel 11 is a C-shaped structure. A first blocking portion 14 is provided on the first shell flow channel 11. 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. The second shell flow channel 31 is a C-shaped structure. A second blocking portion 32 is provided on the second shell flow channel 31. 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. It is blocked by the first blocking portion 14 and has 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. It is blocked by the second blocking portion 32 and has a C-shaped structure. The first shell flow channel and the second shell flow channel are arranged symmetrically. After the first and second shells 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 performs 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 for gas entry, and the air outlet 13 is for gas exit. The flow channel can be provided only on the first shell 1, forming a single-sided flow channel, or it can be provided on both the first shell 1 and the second shell 3, forming a double-sided flow channel. In the 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 arranged symmetrically to ensure gas flow.

[0031] The first shell 1 and the second shell 3 are connected by a plurality of bolts, and a sealing gasket is provided 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 sandwiched between the first shell 1 and the second shell 3, thereby improving 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 drive motor. In the above structure, the drive motor drives the impeller to rotate via the rotating shaft.

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

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

[0035] The hydrogen circulation pump with high-performance flow channels described in the present invention is structurally configured such that, when the circulation pump is required to have a single-sided flow channel structure, a first shell flow channel 11 is provided 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. A flow channel with a linear AR ratio has high performance, and the cross-sections have a corresponding relationship, which can increase the flow rate and pressure ratio, improve the thermal insulation efficiency, and improve the performance with relatively small changes in the shape, ensuring that the hydrogen pump pressure ratio is increased 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, a second shell flow channel 31 is provided 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. It can effectively improve the flow rate and pressure ratio, improve the insulation efficiency, and improve the performance 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 scope of protection of the present invention.

Claims

1. A hydrogen circulation pump with a high-performance flow channel, characterized by: The first shell flow channel (11) is provided on the inner wall of the first shell (1), and 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, and k=A / R is taken, where 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 (11) is removed The first cross-sectional area after the cross-sectional area of ​​the starting air inlet (12) is S1, the last cross-sectional area of ​​the first shell flow channel (11) 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.

2. The hydrogen circulation pump with a high-performance flow channel according to claim 1, characterized in that: A second shell flow channel (31) is provided on the inner wall of the second shell (3), and 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 plurality 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 abscissa, and the AR ratio of the second shell flow channel (31) is taken as the ordinate. 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 a 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 a 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 a high-performance flow channel according to claim 3, characterized in that: An air inlet (12) and an air outlet (13) are provided 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 provided 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 drive 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 a high-performance flow channel according to claim 2, characterized in that: The cross-sections of the second shell flow channel (31) 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.

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