Single-sided double set of blade type hydrogen circulation pump

Abstract

The application provides a single-sided double-group blade hydrogen circulation pump, which comprises a driving shaft, a pump body and an impeller. The center of one side of the pump body is provided with a first mounting hole, and the other side is provided with at least two circles of vortex-shaped grooves and two inlet and outlet channels. Both ends of the groove are respectively provided with a blocking member. The two inlet and outlet channels are communicated with the groove and respectively located at both ends of the groove. The impeller is installed on the driving shaft and located in the pump body. The groove side of the pump body and the impeller form at least two circles of vortex-shaped flow channels. The impeller rotates, fluid enters the flow channel from one of the inlet and outlet channels, is accelerated and pressurized in the flow channel, and then flows out from the other inlet and outlet channel. The application has the advantages of simple structure, small volume, high efficiency, bidirectional work and use as a constant channel when the pump stops working.

Description

Technical Field

[0001] This invention belongs to the field of circulating pump technology, specifically relating to a single-sided double-blade hydrogen circulating pump. Background Technology

[0002] A fuel cell is an electrochemical reaction device that uses hydrogen and oxygen from the air as the anode and cathode, respectively, to generate electricity through a catalytic reaction. The gas emitted after the fuel cell reaction contains a large amount of hydrogen. Releasing this gas into the air not only wastes energy but also poses a danger due to the flammability and explosiveness of hydrogen. Current technologies separate the hydrogen from the reaction gas and then use a hydrogen recirculation pump to reintroduce the separated hydrogen into the reactor.

[0003] The hydrogen circulation pumps used in the prior art are large in size, noisy, have high friction, and operate in one direction. If the inlet and outlet are reversed, it will affect the entire system, and the gas path will be cut off when the pump stops working. Summary of the Invention

[0004] This invention is made to solve the above-mentioned problems, and its purpose is to provide a single-sided double-blade hydrogen circulation pump that is small in size, bidirectional in operation, highly efficient, and has a low-speed-high-pressure ratio.

[0005] This invention provides a single-sided double-blade hydrogen circulation pump, characterized in that it includes: a drive shaft mounted on a drive mechanism;

[0006] A pump body, wherein a first mounting hole is provided at the center of one side of the pump body, and the pump body is sleeved on the drive shaft through the first mounting hole; the other side of the pump body, facing the interior of the pump body, is provided with at least two concentric vortex-shaped grooves and two inlet / outlet channels; a blocking member is provided at each end of the groove; and both inlet / outlet channels are connected to the groove and are located at opposite ends of the groove; and

[0007] An impeller, mounted on the drive shaft and located within the pump body, includes a base plate and a plurality of blades disposed on the same side of the base plate, with the blade side of the impeller facing the side of the pump body that has a groove.

[0008] Wherein, at least two vortex-shaped flow channels are formed between the groove side of the pump body and the impeller.

[0009] As the impeller rotates, fluid enters the flow channel from one of the inlet and outlet channels, is accelerated and pressurized within the flow channel, and then flows out from the other inlet and outlet channel.

[0010] Furthermore, the single-sided double-blade hydrogen circulation pump provided by the present invention may also have the following feature: the groove is a vortex shape that rotates twice.

[0011] Furthermore, the single-sided double-blade hydrogen circulation pump provided by the present invention may also have the following features: the groove includes a non-closed circular first groove and a non-closed circular second groove, the first groove and the second groove are concentric circles, the first groove is the inner ring and the second groove is the outer ring, the two blocking members are respectively disposed between the two ends of the first groove and between the two ends of the second groove, one end of the first groove is provided with an inlet / outlet channel, the other end of the first groove is connected to one end of the second groove, the other end of the second groove is provided with an inlet / outlet channel, and the connection between the second groove and the first groove is such that when the fluid flows from the first groove to the second groove or from the second groove to the first groove, the direction of rotation of the fluid in the first groove and the second groove is the same.

[0012] Furthermore, the single-sided double-blade hydrogen circulation pump provided by the present invention may also have the following features: a circular third groove is provided on the substrate, the outer diameter of the third groove is the same as the outer diameter of the first groove, the inner diameter of the third groove is the same as the inner diameter of the first groove, the third groove and the first groove form a first flow channel with a closed cross-section, and the annular region on the substrate located outside the third groove and the second groove form a second flow channel.

[0013] The blade includes a plurality of first blades and a plurality of second blades, with the plurality of first blades disposed within the third groove and the plurality of second blades disposed on an annular region outside the third groove.

[0014] Furthermore, the single-sided double-blade hydrogen circulation pump provided by the present invention may also have the following feature: a bearing is provided between the pump body and the drive shaft, and the bearing is located on the first mounting hole.

[0015] Furthermore, the single-sided double-blade hydrogen circulation pump provided by the present invention may also have the following feature: a sealing ring is provided between the pump body and the drive shaft.

[0016] Furthermore, the single-sided double-blade hydrogen circulation pump provided by the present invention may also have the following feature: a clearance fit between the pump body and the impeller.

[0017] The present invention has the following advantages:

[0018] According to the single-sided double-blade hydrogen circulation pump of the present invention, the design of the groove and inlet / outlet channels on the pump body not only enables the pump to achieve the low-speed, high-pressure ratio characteristics of a series pump, but also allows it to work in both directions; moreover, the pump is small in size, simple in structure, and highly efficient, and can be used as a normally open channel when the pump stops working. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a single-sided double-blade hydrogen circulation pump in an embodiment of the present invention;

[0020] Figure 2 This is an exploded schematic diagram of a single-sided double-blade hydrogen circulation pump in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the pump cover structure in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the impeller structure in an embodiment of the present invention.

[0023] in, Figure 2 The dashed and solid arrows indicate the direction of fluid flow. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, provide a detailed description of the single-sided double-blade hydrogen circulation pump of the present invention.

[0025] like Figure 1 , Figure 2 As shown, the single-sided double-blade hydrogen circulation pump 100 includes: a drive shaft 10, a pump body 20, and an impeller 30.

[0026] The drive shaft 10 is mounted on the drive mechanism, and the drive mechanism drives the drive shaft 10 to rotate.

[0027] A first mounting hole 21 is provided at the center of one side of the pump body 20. The pump body 20 is sleeved on the drive shaft 10 through the first mounting hole 21, and the rotation of the drive shaft 10 cannot drive the pump body 20 to rotate. Specifically, a bearing is provided between the pump body 20 and the drive shaft 10, and the bearing is located in the first mounting hole 21. The bearing is used to reduce the friction between the drive shaft 10 and the pump body 20 when the drive shaft 10 rotates. More specifically, a sealing ring is also provided between the pump body 20 and the drive shaft 10 for sealing between the pump body 20 and the drive shaft 10.

[0028] On the other side of the pump body 20, facing the interior of the pump body, there are at least two concentric vortex-shaped grooves 22 and two inlet / outlet channels 23 and 24. A blocking member 25 and 26 are respectively provided at both ends of the grooves 22. The two inlet / outlet channels 23 and 24 are connected to the grooves 22 and are located at their respective ends. The blocking members 25 and 26 ensure that after fluid enters the pump body 20 from one inlet / outlet channel, it can only flow along the vortex-shaped flow path to the other inlet / outlet channel and exit the pump body from that channel.

[0029] The impeller 30 is mounted on the drive shaft 10 and located within the pump body 20. The impeller 30 includes a base plate 31 and a plurality of blades 32, the blades 32 being disposed on the same side of the base plate 31. Specifically, the blades 32 can be detachably connected to the base plate 31 or integrally formed with the base plate 31. The blade side of the impeller 30 faces the side of the pump body 20 with a groove. At least two vortex-shaped flow channels are formed between the grooved side of the pump body 20 and the impeller 30.

[0030] In this embodiment, as Figure 2 As shown, the pump body 20 includes a pump body 27 and a pump cover 28. The pump cover 28 matches the pump body 17. Specifically, the pump cover 28 has multiple screw holes, and the pump body 17 also has screw holes at corresponding positions on the pump cover 28. The pump cover 28 and the pump body 17 are fixed together by screws. A first mounting hole 21 is provided on the bottom surface of the pump body 27, specifically, the first mounting hole 21 is located at the center of the bottom surface of the pump body 27. A groove 22 and two inlet / outlet channels 23 and 24 are provided on one side of the pump cover 28 facing the inside of the pump body.

[0031] In this embodiment, as Figure 3 As shown, groove 22 is a vortex shape that rotates twice. Groove 22 includes a non-closed circular first groove 221 and a non-closed circular second groove 222. The first groove 221 and the second groove 222 are concentric circles; specifically, the center of the first groove 221 and the second groove 222 is also the center of the pump cover 28. A blocking member 26 is disposed between the two ends of the first groove 221, and a blocking member 27 is disposed between the two ends of the second groove 222. The first groove 221 is the inner ring, and the second groove 222 is the outer ring. One end of the first groove 221 is provided with an inlet / outlet channel 23, and the other end is connected to one end of the second groove 222. The other end of the second groove 222 is provided with an inlet / outlet channel 24. The connection between the second groove 222 and the first groove 221 ensures that when fluid flows from the first groove 221 to the second groove 222 or from the second groove 222 to the first groove 221, the direction of fluid rotation in the first groove 221 and the second groove 222 is the same. That is, with Figure 3Looking at the direction, the end of the second groove 222 that connects with the first groove 221 is located on the left side of the blocking member 27, and the end of the first groove 221 where the inlet / outlet channel 23 is located is also located on the left side of the blocking member 26. Of course, the connecting ends of the second groove 222 and the first groove 221 can also both be located on the right side of the blocking member 27.

[0032] In this embodiment, as Figure 4 As shown, a circular third groove 311 is provided on the substrate 31. The outer diameter of the third groove 311 is the same as the outer diameter of the first groove 221, and the inner diameter of the third groove 311 is the same as the inner diameter of the first groove 221. The third groove 311 and the first groove 221 form a first flow channel 40 with a closed cross-section. The cross-section of the first flow channel 40 is closed only in relative terms, and the gap between the third groove 311 and the first groove 221 due to relative rotation is not considered. The annular area outside the third groove on the substrate 31 and the second groove 222 form a second flow channel 50. The blade 32 includes a plurality of first blades 321 and a plurality of second blades 322. The plurality of first blades 321 are disposed in the third groove 311, and the plurality of second blades 322 are disposed on the annular area outside the third groove 311. Specifically, the first blades 321 are set at equal angles, the second blades 322 are set at equal angles, and the central angle between two adjacent second blades 322 is smaller than the central angle between two adjacent first blades 321.

[0033] The first flow channel 40 is designed as a closed flow channel, so that when the pump is working, the fluid in the first flow channel 40 is not easy to enter the second groove 222 from the side wall of the first groove 221, but can only flow into the second flow channel 50 from the connection between the first groove 221 and the second groove 222. This allows the pump to better draw in and compress air, resulting in better pump performance.

[0034] Specifically, the cross-sections of the first groove 221 and the third groove 311 are semicircles with the same radius. The cross-section of the second groove 222 is also semicircular. The cross-section of the annular region outside the third groove 311 is a quarter circle. Of course, the cross-sections of the first groove 221, the second groove 222, and the third groove 311 can also be arc-shaped, rectangular, etc., and the cross-section of the annular region outside the third groove 311 can also be other arc-shaped or square, etc.

[0035] Specifically, the clearance fit between the pump body 20 and the impeller 30 results in low noise and low friction during pump operation. That is, the pump cover 28 is clearance-fitted with the side of the impeller 30 facing the pump cover 28, and the bottom surface of the pump body 27 is clearance-fitted with the side of the impeller 30 facing the pump body 27.

[0036] Work process:

[0037] Figure 2The middle arrow indicates the gas flow direction when impeller 30 rotates clockwise. (Example:) Figure 2 As shown, when the impeller 30 rotates clockwise, the gas enters the pump body 20 from the inlet and outlet channels 23. The gas first enters the first flow channel 40, where it is pressurized by the impeller 30 and flows clockwise along the first flow channel 40. Then, it enters the second flow channel 50 from the first flow channel. The gas is pressurized again by the impeller 30 in the second flow channel 50 and flows clockwise along the second flow channel 50. Finally, it flows out of the pump body from the inlet and outlet channels 24.

[0038] When the impeller 30 rotates counterclockwise, the gas enters the pump body 20 from the inlet and outlet channels 24. The gas first enters the second flow channel 50, where it is pressurized by the impeller 30 and flows counterclockwise along the second flow channel 50. Then, it enters the first flow channel 40 from the second flow channel 50. The gas is pressurized again by the impeller 30 in the first flow channel 40 and flows counterclockwise along the first flow channel 40. Finally, it flows out of the pump body from the inlet and outlet channels 23.

[0039] When the impeller rotates, the fluid enters the pump body and rotates twice within the vortex-shaped flow channel, equivalent to two pumps connected in series, resulting in a small size and low-speed, high-pressure ratio. Depending on the impeller's rotation direction, inlet and outlet channels 23 and 24 can serve as both inlet and outlet channels. Furthermore, since inlet and outlet channels 23 and 24 are connected by the vortex-shaped flow channel, they can be used as normally open channels when the single-sided, double-blade hydrogen circulation pump is not in operation.

[0040] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A single-sided double-blade hydrogen circulation pump, characterized in that, include: The drive shaft is mounted on the drive mechanism. The pump body has a first mounting hole at the center of one side, through which it is fitted onto the drive shaft. The other side of the pump body facing the interior of the pump body has at least two vortex-shaped grooves and two inlet / outlet channels. A blocking member is provided at each end of the groove. The two inlet / outlet channels are connected to the groove and are located at the two ends of the groove. as well as An impeller, mounted on the drive shaft and located within the pump body, includes a base plate and a plurality of blades disposed on the same side of the base plate, with the blade side of the impeller facing the side of the pump body that has a groove. Wherein, at least two vortex-shaped flow channels are formed between the groove side of the pump body and the impeller. As the impeller rotates, fluid enters the flow channel from one of the inlet and outlet channels, is accelerated and pressurized within the flow channel, and then flows out from the other inlet and outlet channel.

2. The single-sided double-blade hydrogen circulation pump according to claim 1, characterized in that: The groove is a vortex shape that rotates twice.

3. The single-sided double-blade hydrogen circulation pump according to claim 2, characterized in that: The groove includes a non-closed circular first groove and a non-closed circular second groove. The first groove and the second groove are concentric circles, with the first groove being the inner circle and the second groove being the outer circle. Two blocking members are respectively disposed between the two ends of the first groove and between the two ends of the second groove. One end of the first groove is provided with an inlet / outlet channel, and the other end of the first groove is connected to one end of the second groove. The other end of the second groove is provided with an inlet / outlet channel. The connection between the second groove and the first groove is such that when the fluid flows from the first groove to the second groove or from the second groove to the first groove, the fluid rotates in the same direction in the first groove and the second groove.

4. The single-sided double-blade hydrogen circulation pump according to claim 3, characterized in that: A circular third groove is provided on the substrate. The outer diameter of the third groove is the same as the outer diameter of the first groove, and the inner diameter of the third groove is the same as the inner diameter of the first groove. The third groove and the first groove form a first flow channel with a closed cross-section. An annular region on the substrate located outside the third groove and the second groove form a second flow channel. The blade includes a plurality of first blades and a plurality of second blades, with the plurality of first blades disposed within the third groove and the plurality of second blades disposed on an annular region outside the third groove.

5. The single-sided double-blade hydrogen circulation pump according to claim 1, characterized in that: A bearing is provided between the pump body and the drive shaft, and the bearing is located on the first mounting hole.

6. The single-sided double-blade hydrogen circulation pump according to claim 1, characterized in that: A sealing ring is provided between the pump body and the drive shaft.

7. The single-sided double-blade hydrogen circulation pump according to claim 1, characterized in that: The pump body and the impeller are fitted with a clearance.

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