Gas inlet adjusting device of hydrogen circulating pump

Abstract

The invention relates to the field of circulating pumps, in particular to a hydrogen circulating pump gas inlet adjusting device which comprises a first gas guide pipe, a second gas guide pipe and a first shell and is characterized in that the first gas guide pipe and the second gas guide pipe are fixedly connected through an arc-shaped connecting block; a cleaning mechanism is arranged, a second motor drives a driving shaft to rotate, transmission of a first one-way bearing, a first synchronous wheel and a second synchronous wheel is utilized to drive a first transmission shaft and a reciprocating lead screw to rotate, a threaded plate and the mounting cylinder slide up and down, and the cleaning mechanism is arranged to clean the mounting cylinder. Meanwhile, through transmission of a second one-way bearing, a fourth synchronous wheel, a fifth synchronous wheel, a third synchronous belt and the like, a fourth transmission shaft and a fan are driven to rotate, a third transmission shaft and a cleaning brush are driven to rotate, and automatic cleaning of the filtering layer is achieved. The device does not need frequent manual cleaning, the continuity of system operation is improved, and the maintenance cost and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of circulation pumps, and more particularly to an intake air regulating device for a hydrogen circulation pump. Background Art

[0002] In a fuel cell system, a hydrogen circulation pump is a core component to ensure the efficient recycling of hydrogen. Its main function is to re-transport the unreacted hydrogen in the fuel cell stack back to the fuel cell stack inlet, thereby improving the utilization rate of hydrogen, enhancing the performance and stability of the fuel cell. The intake air regulating device of the hydrogen circulation pump is an important guarantee for the stable operation of the hydrogen circulation pump. It precisely adjusts parameters such as the hydrogen flow rate, pressure, and temperature entering the hydrogen circulation pump, enabling the hydrogen circulation pump to always be in the best working state, and thus improving the efficiency and reliability of the entire fuel cell system.

[0003] A hydrogen circulation pump intake air regulating device with the publication number of CN116412163B includes a regulating main body. The regulating main body has a circular tube structure. A limiting ring is fixedly installed on the inner wall of the regulating main body. A rotating tube is inserted into the regulating main body. A positioning ring is fixedly installed at one end of the rotating tube, and the positioning ring is in contact with the limiting ring. The present invention designs a rotating tube. By adjusting the rotation speed of the rotating tube, the sealing plate can be separated from the corresponding ventilation groove. When the ventilation groove opens, hydrogen can be transported. By adjusting the rotation speed of the rotating tube, the centrifugal force of the sealing plate can be adjusted. When the rotation speed of the rotating tube is relatively fast, the centrifugal force of the sealing plate will also be relatively large. Therefore, the gap between the sealing plate and the ventilation groove is larger, which is convenient for adjusting the hydrogen delivery volume.

[0004] A vacuum pump intake air filter with the publication number of CN221359055U includes a filter housing. The top end of the filter housing is connected to a filter cover through a first fixing block. A filter element is arranged inside the filter housing. An adjusting wheel is rotatably arranged inside the filter cover through a bearing. A mesh cylinder is threadedly arranged at the bottom end of the adjusting wheel, and the mesh cylinder is in contact with the filter element.

[0005] Although both of the above two documents have a pre-intake air treatment function, there are still obvious defects in the gas pretreatment link in Document 1 and Document 2. Specifically, during the operation of the fuel cell system, the recycled hydrogen may carry trace amounts of moisture, catalyst particles, and pipeline pollutants remaining from the fuel cell stack reaction. Although the traditional device is equipped with a basic filter structure, it lacks a self-cleaning mechanism. After long-term operation, the filter is likely to be blocked due to the accumulation of impurities, resulting in a significant increase in the intake air pressure drop, forcing the load power of the circulation pump to fluctuate abnormally. In severe cases, a surge phenomenon may occur. In addition, although Document 2 is provided with a filter housing that can be conveniently opened and closed for dust treatment, frequent shutdown for manual filter cleaning not only reduces the continuity of system operation, but also increases the maintenance cost and safety hazards.

[0006] Therefore, the present invention provides an intake air regulating device for a hydrogen circulation pump to solve the above problems. Summary of the Invention

[0007] In view of the above situation, in order to overcome the deficiencies of the prior art, the present invention provides an intake air regulating device for a hydrogen circulation pump to solve the problems in the prior art that manual filter screen cleaning is required frequently during shutdown, the continuity of system operation is reduced, and the maintenance cost and potential safety hazards are increased.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows: An intake air regulating device for a hydrogen circulation pump, comprising a first air duct, a second air duct and a first housing, characterized in that the first air duct and the second air duct are fixedly connected by an arc-shaped connecting block, a spacing groove for accommodating an installation cylinder is formed between the first air duct and the second air duct, a filter layer is movably installed inside the installation cylinder, the bottom surface of the first housing is fixedly connected to the upper surfaces of the first air duct and the second air duct, a sliding groove for the up and down sliding of the installation cylinder is opened inside the first housing, a second housing is fixedly connected to the upper surface of the first housing, a cleaning mechanism is arranged between the first housing and the second housing, and an intake air regulating mechanism is arranged inside the second air duct.

[0009] Preferably, the intake air regulating mechanism comprises a circular plate, a support column is fixedly connected to the outer surface of the circular plate, the other end of the support column is fixedly connected to the inner wall of the second air duct, a first motor is installed on the outer surface of the support column, and a first adjusting plate is fixedly connected to the outer surface of the output end of the first motor.

[0010] Preferably, a second adjusting plate is fixedly installed inside the second air duct, and the second adjusting plate is located on the left side of the first adjusting plate and is in contact with the first adjusting plate. A first air intake groove is opened inside the second adjusting plate, and a second air intake groove adapted to the second adjusting plate is opened inside the first adjusting plate.

[0011] Preferably, the cleaning mechanism comprises a first air duct installed inside the second housing, the output end of a second motor is fixedly connected to a driving shaft, a first one-way bearing is installed on the outer surface of the driving shaft, a first synchronous pulley is installed on the first one-way bearing, a support plate is fixedly connected inside the second housing, a first transmission shaft is rotatably installed between the support plate and the second housing, a second synchronous pulley is fixedly connected to the outer surface of the first transmission shaft, and the second synchronous pulley and the first synchronous pulley are connected by a first synchronous belt.

[0012] Preferably, a reciprocating lead screw is rotatably installed inside the first housing. Bevel gears are fixedly connected to the outer surfaces of the reciprocating lead screw and the first transmission shaft, and the two bevel gears are meshed with each other. A threaded plate is threadedly connected to the outer surface of the reciprocating lead screw. The threaded plate is slidably connected inside the first housing and is fixedly connected to the top of the mounting cylinder.

[0013] Preferably, a second transmission shaft is rotatably installed inside the second housing. A fifth synchronous pulley is fixedly connected to the outer surface of the second transmission shaft. A second one-way bearing is installed on the outer surface of the driving shaft. A fourth synchronous pulley is installed on the second one-way bearing, and the fourth synchronous pulley and the fifth synchronous pulley are connected by a second synchronous belt.

[0014] Preferably, an air duct is fixedly installed on the left side surface of the first housing. A fourth transmission shaft is rotatably installed between the air duct and the second housing. Sixth synchronous pulleys are fixedly connected to the outer surfaces of the fourth transmission shaft and the second transmission shaft. The two sixth synchronous pulleys are connected by a third synchronous belt. A fan is fixedly installed on the outer surface of the fourth transmission shaft. The left side surface of the first housing is fixedly communicated with an air suction pipe adapted to the fan.

[0015] Preferably, the left side wall of the first housing is fixedly connected with an air suction frame with an open right side, and one end of the air suction pipe is inserted into the inside of the air suction frame. The air suction frame is fixedly connected with a baffle through a connecting column, and an annular air suction groove is formed between the baffle and the air suction frame.

[0016] Preferably, a partition net is fixedly installed inside the air duct, and the partition net is located between the fan and the first housing.

[0017] Preferably, a vertical plate is fixedly connected to the inner top wall of the second housing, and the bottom surface of the vertical plate is inserted into the inside of the first housing. A third transmission shaft is rotatably installed inside the vertical plate. Third synchronous pulleys are fixedly connected to the outer surfaces of the third transmission shaft and the second transmission shaft. The two third synchronous pulleys are connected by a fourth synchronous belt. A cleaning brush adapted to the filter layer is fixedly installed on the outer surface of the third transmission shaft.

[0018] The beneficial effects of the present invention are as follows: 1. By setting a cleaning mechanism, the second motor drives the driving shaft to rotate. Through the transmission of the first one-way bearing, the first synchronous pulley and the second synchronous pulley, the first transmission shaft and the reciprocating lead screw are driven to rotate, so that the threaded plate and the mounting cylinder slide up and down. At the same time, through the transmission of the second one-way bearing, the fourth synchronous pulley, the fifth synchronous pulley, the third synchronous belt, etc., the fourth transmission shaft and the fan are driven to rotate, and the third transmission shaft and the cleaning brush are driven to rotate, finally realizing the automatic cleaning of the filter layer. The present invention does not require frequent manual cleaning, improves the continuity of system operation, and reduces maintenance costs and potential safety hazards.

[0019] 2. By providing an intake air adjustment mechanism in the present invention, the first motor drives the first adjustment plate to rotate, which cooperates with the first intake air groove and the second intake air groove of the second adjustment plate, enabling the adjustment of the intake air volume, putting the hydrogen circulation pump in an optimal working state, and enhancing the efficiency and reliability of the fuel cell system.

[0020] 3. Through the provision of an air suction frame, a baffle, and an annular air suction groove in the present invention, in cooperation with a fan and an air suction pipe, impurities generated during the cleaning process can be effectively collected, keeping the interior of the device clean, and further improving the cleaning effect of the filter layer and the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 is a schematic diagram of the first air duct, the second air duct, and the intake air adjustment mechanism of the present invention; Figure 4 is a schematic diagram of the intake air adjustment mechanism of the present invention; Figure 5 is a schematic diagram of the first air duct, the second air duct, and the cleaning mechanism of the present invention; Figure 6 is a schematic diagram of the connection between the third transmission shaft and the cleaning brush of the present invention; Figure 7 is a schematic diagram of the structure of the air suction frame, the baffle, and the connecting column of the present invention.

[0022] In the figures: 1. First air duct; 2. Second air duct; 3. Installation cylinder; 4. Filter layer; 5. First housing; 6. Second housing; 7. Circular plate; 8. Support column; 9. First motor; 10. First adjustment plate; 11. Second adjustment plate; 12. Second motor; 13. Driving shaft; 14. First one-way bearing; 15. First synchronous pulley; 16. First transmission shaft; 17. Second synchronous pulley; 18. Bevel gear; 19. Reciprocating lead screw; 20. Threaded plate; 21. Second transmission shaft; 22. Vertical plate; 23. Third transmission shaft; 24. Third synchronous pulley; 25. Cleaning brush; 26. Second one-way bearing; 27. Fourth synchronous pulley; 28. Fifth synchronous pulley; 29. Fourth transmission shaft; 30. Sixth synchronous pulley; 31. Fan; 32. Air duct; 33. Partition net; 34. Air suction frame; 35. Baffle; 36. Connecting column; 37. Air suction pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will explain each embodiment of the present invention in detail with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0024] AsFigure 1-7 As shown in the figure, a hydrogen circulation pump intake air regulating device includes a first air duct 1, a second air duct 2, a first housing 5 and a second housing 6. The two are fixedly connected by an arc-shaped connecting block to form a spacer groove for accommodating the installation cylinder 3. A filter layer 4 is movably installed in the installation cylinder 3. The top of the filter layer 4 is threadedly connected to the reciprocating lead screw 19 through a threaded plate 20 and can slide up and down in the chute of the first housing 5 to realize the position adjustment of the filter layer 4. The first air duct 1 and the second air duct 2 are fixedly connected by an arc-shaped connecting block. The spacer groove formed between the two is used to accommodate the installation cylinder 3. A filter layer 4 is movably arranged in the installation cylinder 3 to realize the preliminary filtration of the circulating hydrogen. The bottom surface of the first housing 5 is fixedly connected to the upper surface of the air duct. The internal chute provides a guiding track for the up and down sliding of the installation cylinder 3. The second housing 6 is fixed on the top of the first housing 5 and internally integrates the power components of the cleaning mechanism, which works in cooperation with the transmission components in the first housing 5.

[0025] The intake air regulating mechanism is arranged in the second air duct 2 and includes a circular plate 7, a support column 8, a first motor 9, a first adjusting plate 10 and a second adjusting plate 11. The circular plate 7 is fixed to the inner wall of the air duct through the support column 8. The first motor 9 is installed on the support column 8, and its output end drives the first adjusting plate 10 to rotate. The second adjusting plate 11 is fixed to the left side of the first adjusting plate 10. The two are arranged in a fitting manner and are respectively provided with a first intake air groove and a second intake air groove. When the first motor 9 drives the first adjusting plate 10 to rotate, the overlapping area of the two grooves changes, thereby adjusting the hydrogen intake air volume. When in high load working conditions, the overlapping area of the two grooves is maximized to meet the large flow demand. When in low load working conditions, the flow rate is regulated by reducing the overlapping area to limit the cross-sectional area of the air flow passage, ensuring the stable operation of the circulation pump.

[0026] The power of the cleaning mechanism is provided by the second motor 12. A first one-way bearing 14 and a second one-way bearing 26 with opposite rotation directions are coaxially installed on the driving shaft 13 at the output end of the second motor 12, respectively controlling the lifting of the installation cylinder 3 and the cleaning and adsorption action of the filter layer 4. When the second motor 12 drives the driving shaft 13 to rotate forward, the first one-way bearing 14 is locked, and the first transmission shaft 16 is driven to rotate through the first synchronous pulley 15 and the second synchronous pulley 17. The bevel gear 18 at the end of the first transmission shaft 16 meshes with the reciprocating lead screw 19, so that the threaded plate 20 drives the installation cylinder 3 to move up to the top of the chute. At this time, the filter layer 4 completely breaks away from the spacer groove and rises into the first housing 5. The cleaning brush 25 installed on the third transmission shaft 23 is accurately aligned with the outer peripheral surface of the filter layer 4. The cleaning brush 25 is composed of an arc-shaped brush plate and elastic bristles. The bristles are made of weather-resistant nylon material. When the installation cylinder 3 is stationary, the bristles undergo elastic deformation due to slight extrusion and are closely attached to the surface of the filter layer 4. When rotating with the third transmission shaft 23, the attached impurities can be effectively peeled off. When the filtering function needs to be restored, the driving shaft 13 rotates in the reverse direction, the first one-way bearing 14 idles, and the installation cylinder 3 moves down to the bottom of the chute under the action of gravity and screw drive, completely embedded in the spacer groove, so that the filter layer 4 is exposed to the hydrogen flow path to undertake the normal filtering task.

[0027] When the driving shaft 13 rotates in the reverse direction, the second one-way bearing 26 locks, and drives the second transmission shaft 21 to rotate through the fourth synchronous pulley 27 and the fifth synchronous pulley 28, transmitting power in two paths: one path drives the third synchronous pulley 24 through the fourth synchronous belt, causing the third transmission shaft 23 to rotate, and the cleaning brush 25 rotates and brushes the filter layer 4 to remove the catalyst particles, moisture impurities, etc. accumulated on the surface; the other path drives the fourth transmission shaft 29 through the third synchronous belt, causing the fan 31 to operate at high speed, creating a negative pressure in the air suction pipe 37, and sucking the impurities peeled off by the cleaning brush 25 into the air duct 32 through the annular air suction groove between the air suction frame 34 and the baffle 35, and collecting them in the external dust collection device after being filtered by the internal partition net to avoid secondary pollution.

[0028] The brush board arc of the cleaning brush 25 is consistent with the outer peripheral curvature of the filter layer 4, and the bristles are evenly distributed at an inclination angle of 45°, ensuring full coverage contact with the filter screen surface during rotation. When the mounting cylinder 3 moves up and down, the elastic deformation of the bristles compensates for the slight deformation of the filter layer 4, maintaining a stable cleaning pressure, which not only ensures the impurity peeling effect but also avoids damage to the filter screen caused by rigid contact. The locking directions of the first one-way bearing 14 and the second one-way bearing 26 are opposite, realizing independent control of the two functions of "rising and resetting" and "cleaning and adsorption". When rotating forward, it only drives the mounting cylinder 3 to rise, and when rotating in the reverse direction, it only activates the cleaning brush 25 and the fan 31, avoiding power conflicts and improving the reliability of the mechanism. The partition net in the air duct 32 blocks larger particle impurities to protect the fan 31. The annular air suction groove surrounds the outer periphery of the filter layer 4 to ensure that the impurities generated during the cleaning process are adsorbed in time, maintaining the cleanliness inside the device.

[0029] When it is necessary to adjust the hydrogen flow rate entering the hydrogen circulation pump, the first motor 9 starts and drives the first adjusting plate 10 to rotate relative to the second adjusting plate 11. Since the second adjusting plate 11 is fixed in the second air duct 2 and the first air intake groove inside it is adapted to the second air intake groove of the first adjusting plate 10, by changing the overlapping area of the two air intake grooves, the cross-sectional area of hydrogen flow can be adjusted, thereby accurately controlling the intake air volume. For example, when the fuel cell system is in a high-load working condition, the first adjusting plate 10 rotates until the two air intake grooves completely overlap, and at this time, the intake air flow area is the largest, meeting the large-flow intake air demand; when the system is in a low-load working condition, the first adjusting plate 10 rotates to reduce the overlapping area of the air intake grooves, restricting the air flow path and reducing the intake air flow rate to ensure that the hydrogen circulation pump is always in the best working state.

[0030] When there is a large amount of impurities accumulated on the surface area of the filter layer 4 and cleaning is required, the second motor 12 is started: the installation cylinder rises (rotates forward), the second motor 12 drives the main shaft 13 to rotate forward, the first one-way bearing 14 is locked, and through the first synchronous pulley 15, the second synchronous pulley 17 and the first synchronous belt, the first transmission shaft 16 is driven to rotate. The bevel gear 18 at its end meshes with the reciprocating lead screw 19, causing the reciprocating lead screw 19 to rotate. The threaded plate 20 drives the installation cylinder 3 to slide upward along the chute of the first housing 5 until the filter layer 4 completely disengages from the spacer groove and rises into the first housing 5. At this time, the filter layer 4 is aligned with the cleaning brush 25.

[0031] When the main shaft 13 rotates in the reverse direction, the first one-way bearing 14 idles, and the second one-way bearing 26 is locked. Through the fourth synchronous pulley 27, the fifth synchronous pulley 28 and the second synchronous belt, the second transmission shaft 21 is driven to rotate. The power is transmitted in two paths: one path drives the third synchronous pulley 24 through the fourth synchronous belt, causing the third transmission shaft 23 to rotate, and the cleaning brush 25 rotates and brushes the filter layer 4 to strip the catalyst particles, moisture impurities, etc. on the surface. The other path drives the fourth transmission shaft 29 through the third synchronous belt, causing the fan 31 to operate at high speed, creating a negative pressure in the air suction pipe 37. Through the annular air suction groove between the air suction frame 34 and the baffle 35, the impurities stripped by the cleaning brush 25 are sucked into the air cylinder 32 and collected into an external dust collection device after being filtered by the partition net 33.

[0032] After the cleaning is completed, the main shaft 13 rotates forward again, the installation cylinder 3 descends into the spacer groove, and the filter layer 4 is exposed to the hydrogen flow path again, restoring the filtering function. Through the reverse locking characteristics of the first one-way bearing 14 and the second one-way bearing 26, independent control of the "rising and resetting" and "cleaning and adsorption" functions is achieved, ensuring the reliable operation of the mechanism, eliminating the need for frequent manual cleaning of the filter layer, improving the continuity of the system operation, and reducing the maintenance cost and safety hazards.

[0033] It should be noted that in the description of the present invention, the terms indicating directions or position relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or position relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A hydrogen circulation pump intake regulating device, comprising a first air guide pipe (1), a second air guide pipe (2) and a first shell (5), characterized in that: The first air guide tube (1) and the second air guide tube (2) are fixedly connected via an arc-shaped connecting block; a spacing groove for accommodating a mounting tube (3) is formed between the first air guide tube (1) and the second air guide tube (2); a filter layer (4) is movably mounted inside the mounting tube (3); the bottom surface of the first shell (5) is fixedly connected to the upper surfaces of the first air guide tube (1) and the second air guide tube (2); a sliding groove for the mounting tube (3) to slide up and down is provided inside the first shell (5); the upper surface of the first shell (5) is fixedly connected to the second shell (6); a cleaning mechanism is provided between the first shell (5) and the second shell (6); and an air intake regulating mechanism is provided inside the second air guide tube (2).

2. A hydrogen circulation pump intake regulating device according to claim 1, characterized in that: The air intake regulating mechanism comprises a circular plate (7), the outer surface of the circular plate (7) being fixedly connected to a support column (8), the other end of the support column (8) being fixedly connected to the inner wall of the second air guide pipe (2), the outer surface of the support column (8) being mounted with a first motor (9), and the outer surface of an output end of the first motor (9) being fixedly connected to a first regulating plate (10).

3. A hydrogen circulation pump intake regulating device according to claim 2, characterized in that: A second adjustment plate (11) is fixedly mounted inside the second air guide tube (2), and the second adjustment plate (11) is located on the left side of the first adjustment plate (10) and fits the first adjustment plate (10), a first air inlet groove is provided inside the second adjustment plate (11), and a second air inlet groove adapted to the second adjustment plate (11) is provided inside the first adjustment plate (10).

4. The hydrogen circulation pump intake regulating device according to claim 1, characterized in that: The cleaning mechanism comprises a first air guide pipe (1) installed inside a second housing (6); the output end of the second motor (12) is fixedly connected to a driving shaft (13); a first one-way bearing (14) is installed on the outer surface of the driving shaft (13); a first synchronous wheel (15) is installed on the first one-way bearing (14); a support plate is fixedly connected inside the second housing (6); a first transmission shaft (16) is rotatably installed between the support plate and the second housing (6); a second synchronous wheel (17) is fixedly connected to the outer surface of the first transmission shaft (16); and the second synchronous wheel (17) and the first synchronous wheel (15) are connected to each other through a first synchronous belt transmission.

5. A hydrogen circulation pump intake regulating device according to claim 4, characterized in that: A reciprocating screw (19) is rotatably mounted inside the first housing (5); the outer surfaces of the reciprocating screw (19) and the first transmission shaft (16) are both fixedly connected to bevel gears (18), and the two bevel gears (18) are meshed with each other; the outer surface of the reciprocating screw (19) is threadedly connected to a threaded plate (20); the threaded plate (20) is slidably connected to the inside of the first housing (5) and fixedly connected to the top of the mounting cylinder (3).

6. A hydrogen circulation pump intake regulating device according to claim 5, characterized in that: A second transmission shaft (21) is rotatably mounted inside the second housing (6); a fifth synchronous wheel (28) is fixedly connected to the outer surface of the second transmission shaft (21); a second one-way bearing (26) is mounted on the outer surface of the driving shaft (13); a fourth synchronous wheel (27) is mounted on the second one-way bearing (26); and the fourth synchronous wheel (27) and the fifth synchronous wheel (28) are connected to each other via a second synchronous belt transmission.

7. A hydrogen circulation pump intake regulating device according to claim 6, characterized in that: A wind tube (32) is fixedly mounted on the left side of the first housing (5); a fourth transmission shaft (29) is rotatably mounted between the wind tube (32) and the second housing (6); the outer surfaces of the fourth transmission shaft (29) and the second transmission shaft (21) are both fixedly connected with a sixth synchronous wheel (30); the two sixth synchronous wheels (30) are connected to each other through a third synchronous belt transmission; a fan (31) is fixedly mounted on the outer surface of the fourth transmission shaft (29); and a suction pipe (37) adapted to the fan (31) is fixedly connected to the left side of the first housing (5).

8. The hydrogen circulation pump intake regulating device according to claim 7, characterized in that: The left side wall of the first shell (5) is fixedly connected to an air suction frame (34) with an opening on the right side, and one end of an air suction pipe (37) is inserted into the interior of the air suction frame (34); the air suction frame (34) is fixedly connected to a baffle plate (35) via a connecting column (36), and an annular air suction groove is formed between the baffle plate (35) and the air suction frame (34).

9. A hydrogen circulation pump intake regulating device according to claim 8, characterized in that: A partition net (33) is fixedly installed inside the air cylinder (32), and the partition net (33) is located between the fan (31) and the first shell (5).

10. A hydrogen circulation pump intake regulating device according to claim 9, characterized in that: The inner top wall of the second shell (6) is fixedly connected to a vertical plate (22), and the bottom surface of the vertical plate (22) is inserted into the interior of the first shell (5). A third transmission shaft (23) is rotatably mounted inside the vertical plate (22). The outer surfaces of the third transmission shaft (23) and the second transmission shaft (21) are both fixedly connected to third synchronous wheels (24). The two third synchronous wheels (24) are connected via a fourth synchronous belt transmission. A cleaning brush (25) adapted to the filter layer (4) is fixedly mounted on the outer surface of the third transmission shaft (23).

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