阅读说明：本技术 用于燃料电池系统的氢气循环装置 (Hydrogen circulation device for fuel cell system ) 是由 王红 张学智 杨登峰 于 2021-07-14 设计创作，主要内容包括：本发明提供了一种用于燃料电池系统的氢气循环装置,包括依次连接的电机、氢气循环泵和引射器,其中：所述氢气循环泵的进口与所述引射器的第一进口通过第一管道连通,所述氢气循环泵的出口与所述引射器的第三进口通过第二管道连通,所述第一管道能够通过第三管道与电堆阳极出口连通,所述第一管道上设有能够控制氢气流向的第一阀门,所述第二管道上设有第二阀门,所述引射器的第二进口用于与氢气罐连通,所述引射器的出口用于与电堆阳极进口连通。本发明提供的用于燃料电池系统的氢气循环装置,旨在实现简化氢气循环泵和引射器在燃料电池系统内的连接管路。(The invention provides a hydrogen circulating device for a fuel cell system, which comprises a motor, a hydrogen circulating pump and an ejector which are sequentially connected, wherein: the inlet of hydrogen circulating pump with the first import of ejector is through first pipeline intercommunication, the export of hydrogen circulating pump with the third import of ejector passes through the second pipeline intercommunication, first pipeline can be through third pipeline and pile anode outlet intercommunication, be equipped with the first valve that can control the hydrogen flow direction on the first pipeline, be equipped with the second valve on the second pipeline, the second import of ejector is used for with the hydrogen jar intercommunication, the export of ejector is used for with pile anode inlet intercommunication. The invention provides a hydrogen circulating device for a fuel cell system, aiming at simplifying the connecting pipeline of a hydrogen circulating pump and an ejector in the fuel cell system.)

1. A hydrogen circulating device for fuel cell system, its characterized in that is including the motor, hydrogen circulating pump and the ejector that connect gradually, wherein:

the utility model discloses a hydrogen fuel cell stack, including hydrogen circulating pump, ejector, first pipeline, first valve, hydrogen circulating pump's import with the first import of ejector is through first pipeline intercommunication, the export of hydrogen circulating pump with the third import of ejector passes through the second pipeline intercommunication, first pipeline can be through third pipeline and pile anode outlet intercommunication, first pipeline with the first valve is established to the intercommunication department of third pipeline, first valve is used for control pile anode outlet with hydrogen circulating pump or the ejector intercommunication, be equipped with the second valve on the second pipeline, the second import of ejector is used for with hydrogen jar intercommunication, the export of ejector is used for with pile anode inlet intercommunication.

2. The hydrogen circulation device for a fuel cell system according to claim 1, wherein a bottom of the hydrogen circulation pump has a drain port.

3. The hydrogen circulation device for a fuel cell system according to claim 1, wherein the hydrogen circulation pump is a roots-type circulation pump having 2 to 8 roots blades.

4. The hydrogen circulation device for a fuel cell system according to claim 2, wherein the hydrogen circulation pump and the ejector are externally covered with a case.

5. The hydrogen circulation device for a fuel cell system according to claim 4, further comprising a mounting assembly that is connected to the motor and the housing, respectively, has a degree of freedom to rotate in a plane perpendicular to an output shaft of the motor, and can be fixed relative to the motor and the housing.

6. The hydrogen circulation device for a fuel cell system according to claim 5, wherein the mounting assembly comprises:

the first mounting seat is connected with the motor, has a degree of freedom of rotation in a plane perpendicular to an output shaft of the motor, and can be relatively fixed with the motor;

the adjusting disc is positioned between the shell and the motor, is provided with a through hole which enables an output shaft of the motor to penetrate through and is connected with a gear in the hydrogen circulating pump, has a degree of freedom of rotation in a plane perpendicular to the output shaft of the motor, and can be relatively fixed with the motor and the shell; and

And the second mounting seat is connected to the shell, has a degree of freedom of rotation in a plane perpendicular to the output shaft of the motor, and can be relatively fixed with the shell.

7. The hydrogen circulation device for the fuel cell system according to claim 6, wherein the adjustment disk is provided with a plurality of first adjustment holes and a plurality of second adjustment holes, the plurality of first adjustment holes are distributed in an annular array, the plurality of second adjustment holes are distributed in an annular array, the first adjustment holes can be connected to the motor through a first connection member, and the second adjustment holes can be connected to the gear box through a second connection member.

8. The hydrogen circulation device for a fuel cell system according to claim 7, wherein the first regulation hole and the second regulation hole are distributed in the same circumferential surface.

9. The hydrogen circulation device for a fuel cell system according to claim 7, wherein the first regulation holes and the second regulation holes are alternately arranged in a circumferential direction of the through-hole.

10. The hydrogen circulation device for a fuel cell system according to claim 7, wherein the first regulation hole is a circular hole, and the second regulation hole is an arc-shaped hole or a circular hole.

Technical Field

The invention belongs to the technical field of fuel cells, and particularly relates to a hydrogen circulating device for a fuel cell system.

Background

A hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electrical energy. After the hydrogen fuel cell reaction, the discharged gas contains a large amount of hydrogen, and if the hydrogen is directly discharged into the atmosphere, on one hand, the hydrogen easily causes waste of energy sources, and on the other hand, the hydrogen easily causes pollution to the environment. Therefore, a hydrogen circulation pump is commonly used to deliver the mixed gas containing hydrogen at the outlet of the anode of the stack to the inlet of the anode of the stack, thereby improving the utilization rate of hydrogen.

However, the hydrogen circulation pump is driven by a motor, and parasitic power consumption is generated in the whole system. Therefore, the ejector is adopted to recover the unreacted hydrogen in the galvanic pile under the condition of high power. However, the existing hydrogen circulating pump and ejector are usually connected with the fuel cell system respectively, the connecting pipeline is complex, the integration level is low, and the occupied area of the system is large.

Disclosure of Invention

The invention aims to provide a hydrogen circulating device for a fuel cell system, aiming at simplifying the connecting pipeline of a hydrogen circulating pump and an ejector in the fuel cell system.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a hydrogen circulating device for fuel cell system, including motor, hydrogen circulating pump and the ejector that connects gradually, wherein:

the utility model discloses a hydrogen fuel cell stack, including hydrogen circulating pump, ejector, first pipeline, first valve, hydrogen circulating pump's import with the first import of ejector is through first pipeline intercommunication, the export of hydrogen circulating pump with the third import of ejector passes through the second pipeline intercommunication, first pipeline can be through third pipeline and pile anode outlet intercommunication, first pipeline with the intercommunication department of third pipeline is equipped with first valve, first valve is used for control pile anode outlet with hydrogen circulating pump or the ejector intercommunication, be equipped with the second valve on the second pipeline, the second import of ejector is used for with hydrogen jar intercommunication, the export of ejector is used for with pile anode inlet intercommunication.

In one possible implementation, the bottom of the hydrogen circulation pump has a drain outlet.

In one possible implementation, the hydrogen circulation pump is a roots-type circulation pump having 2-8 roots blades.

In one possible implementation, the hydrogen circulation pump and the ejector are externally covered with a housing.

In one possible implementation, the hydrogen circulation device for a fuel cell system further includes a mounting assembly, which is connected to the motor and the housing, respectively, has a degree of freedom to rotate in a plane perpendicular to an output shaft of the motor, and can be fixed relative to the motor and the housing.

In one possible implementation, the mounting assembly includes:

the first mounting seat is connected with the motor, has a degree of freedom of rotation in a plane perpendicular to an output shaft of the motor, and can be relatively fixed with the motor;

the adjusting disc is positioned between the shell and the motor, is provided with a through hole which enables an output shaft of the motor to penetrate through and is connected with a gear in the hydrogen circulating pump, has a degree of freedom of rotation in a plane perpendicular to the output shaft of the motor, and can be relatively fixed with the motor and the shell; and

And the second mounting seat is connected to the shell, has a degree of freedom of rotation in a plane perpendicular to the output shaft of the motor, and can be relatively fixed with the shell.

In a possible implementation manner, the adjusting disk is provided with a plurality of first adjusting holes and a plurality of second adjusting holes, the first adjusting holes are distributed in an annular array mode, the second adjusting holes are distributed in an annular array mode, the first adjusting holes can be connected with the motor through first connecting pieces, and the second adjusting holes can be connected with the gear box through second connecting pieces.

In a possible implementation manner, the first adjusting holes and the second adjusting holes are distributed on the same circumferential surface.

In a possible implementation manner, the first adjusting holes and the second adjusting holes are alternately arranged along the circumferential direction of the through hole.

In one possible implementation, the first adjusting hole is a circular hole, and the second adjusting hole is an arc-shaped hole or a circular hole.

The hydrogen circulating device for the fuel cell system has the advantages that: compared with the prior art, when the fuel cell runs at low power, the hydrogen circulating device for the fuel cell system controls hydrogen to flow from the anode outlet of the stack to the hydrogen circulating pump through the first valve, then enters the ejector from the third inlet of the ejector along the second pipeline, is discharged from the outlet of the ejector and then enters the anode of the stack from the anode inlet of the stack; when the fuel cell runs at high power, the first valve controls hydrogen to flow from the anode outlet of the galvanic pile to the ejector, the hydrogen tank also injects hydrogen into the ejector, then the hydrogen is discharged from the outlet of the ejector and re-enters the anode of the galvanic pile, and the second valve is closed to prevent the hydrogen from flowing back to the hydrogen circulating pump. This device can freely switch over the use of hydrogen circulating pump and ejector according to fuel cell's operating power, and convenient operation does not produce extra power and has reduced the energy consumption, and connection structure is simple simultaneously, can not occupy too much place.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a hydrogen circulation device for a fuel cell system according to an embodiment of the present invention;

fig. 2 is a sectional view of a hydrogen circulation device for a fuel cell system according to a second embodiment of the present invention;

FIG. 3 is a front view of an adjustment dial employed in a third embodiment of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a front view of an adjustment dial employed in a fourth embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first mounting seat adopted in the fifth embodiment of the present invention.

In the figure: 1. a motor; 2. a hydrogen circulation pump; 3. an ejector; 4. a hydrogen tank; 5. a stack anode; 6. a first valve; 7. a second valve; 8. a third pipeline; 9. a housing; 10. a first conduit; 11. a second conduit; 12. a first mounting seat; 1201. a second fixing hole; 1202. a first fixing hole; 1203. a first fixing plate; 1204. a second fixing plate; 13. an adjusting disk; 1301. mounting holes; 1302. a through hole; 1303. a first adjustment aperture; 1304. a second adjustment aperture; 1305. a connecting portion; 14. a second mounting seat; 1401. a third fixing plate; 1402. a fourth fixing plate; 1403. and a fourth fixing hole.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2 together, a hydrogen circulation device for a fuel cell system according to the present invention will now be described. A hydrogen circulating device for fuel cell system, including motor 1, hydrogen circulating pump 2 and the ejector 3 that connects gradually, wherein:

the import of hydrogen circulating pump 2 and the first import of ejector 3 are through first pipeline 10 intercommunication, the export of hydrogen circulating pump 2 and the third import of ejector 3 are through second pipeline 11 intercommunication, first pipeline 10 can be through third pipeline 8 and pile anode 5 export intercommunication, the intercommunication department of first pipeline 10 and third pipeline 8 is equipped with first valve 6, first valve 6 is used for controlling pile anode 5 export and hydrogen circulating pump 2 or ejector 3 intercommunication, be equipped with second valve 7 on the second pipeline 11, the second import of ejector 3 is used for communicating with hydrogen jar 4, the export of ejector 3 is used for communicating with pile anode 5 import.

Compared with the prior art, the hydrogen circulating device for the fuel cell system provided by the invention has the advantages that when the fuel cell runs at low power, the first valve 6 controls the mixed gas to flow from the outlet of the anode 5 of the stack to the hydrogen circulating pump 2, then the mixed gas enters the ejector 3 from the third inlet of the ejector 3 along the second pipeline 11, is discharged from the outlet of the ejector 3 and then enters the anode 5 of the stack from the inlet of the anode 5 of the stack; when the fuel cell runs at high power, the first valve 6 controls the mixed gas to flow from the outlet of the pile anode 5 to the ejector 3, the hydrogen tank 4 also injects hydrogen into the ejector 3, then the mixed gas and the hydrogen are discharged from the outlet of the ejector 3 and enter the pile anode 5 again, and the second valve 7 is closed to prevent the mixed gas and the hydrogen from flowing back to the hydrogen circulating pump 2. This device can freely switch between hydrogen circulating pump 2 and ejector 3 according to fuel cell's operating power, and convenient operation does not produce extra power and has reduced the energy consumption, and connection structure is simple simultaneously, can not occupy too much place.

In some embodiments, not shown, the bottom of the hydrogen circulation pump 2 has a drain.

The mixed gas contains hydrogen and water vapor and also contains partial liquid water, the freezing phenomenon easily occurs to the water vapor and the liquid water in the low-temperature environment, so that the rotor and the shell 9 of the hydrogen circulating pump 2 are frozen, the water outlet can ensure that the water vapor and the liquid water in the shell 9 can be discharged in time, and the freezing phenomenon is avoided.

In some embodiments, not shown, the hydrogen circulation pump 2 is a roots-type circulation pump having 2-8 roots blades.

Two opposite direction synchronous rotation's leaf shape rotors have in the roots formula circulating pump, and hydrogen circulating pump 2 freezes the back, influences its normal use, and the roots formula circulating pump can realize breaking ice through the output torque of adjusting motor 1.

In some embodiments, referring to fig. 1, the hydrogen circulation pump 2 and the ejector 3 are externally covered with a housing 9.

Casing 9 can protect hydrogen circulating pump 2 and ejector 3 not receive external disturbance, protects its connection structure's stability, and casing 9 makes hydrogen circulating pump 2 and ejector 3 become overall structure, easy to assemble and removal simultaneously.

In some embodiments, referring to fig. 2, the hydrogen circulation device for a fuel cell system further includes a mounting assembly, which is connected to the motor 1 and the housing 9, respectively, has a degree of freedom to rotate in a plane perpendicular to the output shaft of the motor 1, and can be fixed relative to the motor 1 and the housing 9.

When the angle of the installation surface is changed, the water outlet of the hydrogen circulating pump 2 cannot be kept at the bottom, so that water cannot be drained in time, the installation assembly is adopted to be connected with the motor 1 and the shell 9 respectively, the installation assembly can be stably connected with the installation surface when the angle of the installation surface is changed, but the motor 1 and the shell 9 are kept at the same angle, and therefore the water can be drained from the water outlet at the bottom of the hydrogen circulating pump 2.

Specifically, the bottom of the housing 9 is provided with an opening capable of draining water.

In some embodiments, referring to fig. 2 to 6, the mounting assembly includes a first mounting seat 12, an adjusting plate 13 and a second mounting seat 14, the first mounting seat 12 is connected to the motor 1, has a degree of freedom of rotation in a plane perpendicular to an output shaft of the motor 1, and can be fixed relative to the motor 1; the adjusting disk 13 is positioned between the shell 9 and the motor 1, the adjusting disk 13 is provided with a through hole 1302 which enables the output shaft of the motor 1 to penetrate through and is connected with a gear in the hydrogen circulating pump 2, the adjusting disk 13 has the freedom of rotating in a plane vertical to the output shaft of the motor 1, and can be relatively fixed with the motor 1 and the shell 9; the second mounting base 14 is attached to the housing 9, has a degree of freedom of rotation in a plane perpendicular to the output shaft of the motor 1, and can be fixed relative to the housing 9.

When the angle of the installation surface is changed, the first installation seat 12, the second installation seat 14 and the adjusting disc 13 can be rotated simultaneously, so that the installation surface can be fixed, the position of the shell 9 is ensured to be unchanged, and the water outlet of the hydrogen circulating pump 2 is always positioned at the bottom. The adjusting disk 13 can be fixedly connected with the motor 1, so that the motor 1 can synchronously rotate along with the first mounting seat 12 and the adjusting disk 13, and can also be rotatably connected with the motor 1, and when the adjusting disk 13 is adjusted to a specified position, the motor 1 and the adjusting disk 13 are fixed, so that the position of the motor 1 is always kept unchanged.

When the angle of installation face changes, need not whole rotatory casing 9, make it can with installation face fixed connection through the angle of adjusting first mount pad 12, second mount pad 14 and adjusting disk 13, make casing 9 remain original state throughout to guarantee that the outlet is located hydrogen circulating pump 2 bottoms, conveniently discharge the comdenstion water. This device simple structure can be applicable to the installation face of different angles, guarantees that the outlet is located hydrogen circulating pump 2's lower part all the time, and the convenient condensate water with in hydrogen circulating pump 2 in time discharges, has increased hydrogen circulating pump 2's life.

In some embodiments, referring to fig. 3 to 5, the adjusting plate 13 is provided with a plurality of first adjusting holes 1303 and a plurality of second adjusting holes 1304, the plurality of first adjusting holes 1303 are distributed in an annular array, the plurality of second adjusting holes 1304 are distributed in an annular array, the first adjusting holes 1303 can be connected with the motor 1 through a first connecting member, and the second adjusting holes 1304 can be connected with the gear box through a second connecting member.

In this embodiment, the first adjusting hole 1303 and the second adjusting hole 1304 are respectively connected to the motor 1 and the housing 9, when the installation angle needs to be adjusted, the first connecting piece and the second connecting piece are loosened, and the first connecting piece and the second connecting piece are respectively connected to the motor 1 and the housing 9 after the adjusting plate 13 rotates to a proper position, so that the positions of the motor 1 and the housing 9 are kept unchanged, or the position of the housing 9 is unchanged, and the motor 1 rotates along with the adjusting plate 13, thereby effectively draining water from the water outlet. The plurality of first adjusting holes 1303 and the plurality of second adjusting holes 1304 are respectively located on the same circumferential surface, so that the rotated first adjusting holes 1303 and the rotated second adjusting holes 1304 can also correspond to the corresponding connecting holes on the motor 1 or the gear box, and the connection is convenient.

In some embodiments, referring to fig. 3 to 5, the first adjusting holes 1303 and the second adjusting holes 1304 are distributed on the same circumferential surface.

First regulation hole 1303 and second regulation hole 1304 are at same periphery, conveniently process first regulation hole 1303 and second regulation hole 1304, also conveniently are connected adjustment disk 13 with motor 1 and gear box, have reduced the cost of processing and installation.

In some embodiments, referring to fig. 3 to 4, the first adjusting holes 1303 and the second adjusting holes 1304 are alternately arranged along the circumference of the through hole 1302.

First regulation hole 1303 and second regulation hole 1304 that set up in turn can make intensity even everywhere on adjusting plate 13, and the atress is even everywhere when the atress, avoids local damage. Meanwhile, the stability of connection with the motor 1 and the gear box can be increased.

In some embodiments, referring to fig. 3 to 5, the first adjusting holes 1303 are circular holes, and the second adjusting holes 1304 are arc-shaped holes or circular holes.

When second regulation hole 1304 is the arc hole, motor 1 and adjusting disk 13 are static relatively, make motor 1 and adjusting disk 13 synchronous revolution after the angle of installation face changes, and the second connecting piece can slide in second regulation hole 1304, after adjusting disk 13 rotates to suitable position, locks second connecting piece and casing 9. When the second adjusting hole 1304 is a circular hole, the motor 1 may rotate with the adjusting disk 13, or may be stationary when the adjusting disk 13 rotates. First regulation hole 1303 sets up to be connected with motor 1 that circular can be more firm, keeps holistic stability at motor 1 during operation, no matter how the shape of second regulation hole 1304, can both make hydrogen circulating pump 2 and ejector 3 normal stable work.

Optionally, at least three first adjusting holes 1303 and at least three second adjusting holes 1304 are respectively provided.

Optionally, the number and the included angle of the second adjusting holes 1304 may be adjusted according to the rotation angle of the adjusting plate 13.

In some embodiments, referring to fig. 3-5, the first and second adjustment holes 1303, 1304 are counter-bored.

The counter bore can make first connecting piece and second connecting piece needn't bulge in adjusting disk 13, avoids influencing the normal work of motor 1.

In some embodiments, referring to fig. 3 to 5, the adjusting plate 13 has a connecting portion 1305 capable of connecting with the mounting surface, and the connecting portion 1305 is provided with a mounting hole 1301 capable of connecting with the mounting surface through a third connecting member.

Pass mounting hole 1301 through the third connecting piece and be connected adjusting disk 13 and installation face, convenient dismantlement has improved the installation effectiveness.

Optionally, the third connector is a threaded member.

In some embodiments, referring to fig. 6, the first mounting base 12 includes a first fixing plate 1203 capable of being connected to the motor 1 and a second fixing plate 1204 connected to a mounting surface, and the first fixing plate 1203 and the second fixing plate 1204 are disposed at an included angle; the second mounting seat 14 includes a third fixing plate 1401 capable of being connected to the housing 9 and a fourth fixing plate 1402 connected to the mounting surface, and the third fixing plate 1401 and the fourth fixing plate 1402 are disposed at an angle.

The first fixing plate 1203 can be attached to the motor 1, the second fixing plate 1204 can be attached to the mounting surface, the third fixing plate 1401 can be attached to the housing 9, and the fourth fixing plate 1402 can be attached to the mounting surface, so that the fixed housing 9 is more stable.

In some embodiments, referring to fig. 6, the first fixing plate 1203 is formed with a first fixing hole 1202, and the second fixing plate 1204 is formed with a second fixing hole 1201; the third fixing plate 1401 defines a third fixing hole, and the fourth fixing plate 1402 defines a fourth fixing hole 1403.

The first fixing plate 1203 is connected with the motor 1 through a threaded connector penetrating through the first fixing hole 1202, and the second fixing plate 1204 is connected with a mounting surface through another threaded connector penetrating through the second fixing hole 1201; pass the third fixed orifices through threaded connection and be connected third fixed plate 1401 and casing 9, another threaded connection of rethread passes fourth fixed orifices 1403 and is connected fourth fixed plate 1402 with the installation face, simple to operate has improved the installation effectiveness, and motor 1 after connecting moreover and casing 9 can be stable fix on the installation face, guarantee motor 1, hydrogen circulating pump 2 and ejector 3 job stabilization nature.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.