CN210033890U - Hydrogen circulating pump and fuel cell vehicle - Google Patents
Hydrogen circulating pump and fuel cell vehicle Download PDFInfo
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- CN210033890U CN210033890U CN201920790908.5U CN201920790908U CN210033890U CN 210033890 U CN210033890 U CN 210033890U CN 201920790908 U CN201920790908 U CN 201920790908U CN 210033890 U CN210033890 U CN 210033890U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model discloses a hydrogen circulating pump and fuel cell vehicle, this hydrogen circulating pump includes: a drive motor; the mounting seat is provided with a first annular flow channel cavity along the circumferential direction of the center, an air suction port and an air exhaust port are arranged at the upper part of the mounting seat of the first annular flow channel cavity, and the first annular flow channel cavity is gradually narrowed from the air suction port to the air exhaust port; the main shaft is connected with an output shaft of the driving motor; the bearing is arranged on the mounting seat and is in interference fit with the main shaft; the impeller is in screwed connection with the main shaft through threads, and blades of the impeller are of an arc structure; the flow channel cover is fixedly connected with the mounting seat, a second annular flow channel cavity is arranged on the flow channel cover along the central circumferential direction, the second annular flow channel cavity and the first annular flow channel cavity form a complete annular flow channel cavity, and the second annular flow channel cavity is gradually narrowed from the air suction port to the air exhaust port. The utility model discloses cancel synchronous gear completely, do not need lubricating oil, avoided the risk of oil leak.
Description
Technical Field
The utility model belongs to hydrogen energy automobile-used energy recuperation device especially relates to a hydrogen circulating pump and fuel cell vehicle.
Background
As a new automobile project, a hydrogen fuel cell automobile can be popularized in the market only by needing more technology accumulation, compared with the traditional automobile, parts which are to be broken through urgently in the main technology of the hydrogen fuel cell automobile surround a galvanic pile, an air compressor and a hydrogen circulating pump, wherein the hydrogen circulating pump needs to meet the technical problems of small volume, large flow, high pressure ratio, hydrogen embrittlement resistance, cold start, oil-free performance and the like, and before the technical problems, the related technology is always in a blank state at home and abroad, and mature and reliable products developed aiming at the fuel cell are not produced.
Different from a positive displacement compressor and a vacuum pump, when the circulating pump is used, gas with lower pressure is pressurized through the circulating pump, and high-pressure gas is discharged. The pressure lost after the power generation reaction of the fuel cell is supplemented through the circulating operation, and the stable operation of the whole system is controlled. The high-pressure hydrogen discharged by the hydrogen circulating pump enters the galvanic pile to react, and the hydrogen discharged by the circulating pump is absolutely free of oil because of the sensitivity of the galvanic pile to oil.
Although the domestic fuel cell automobile multi-import foreign small-sized claw type circulating pump solves the requirements of small volume, large flow and high pressure ratio, the risk of oil leakage always exists along with the abrasion of an oil seal, and as long as the oil in the hydrogen circulating pump leaks in a small amount, a pile at the rear end can be damaged. At present, many events of fuel leakage causing damage of the electric pile are found in the fuel cell automobile industry, and structurally solving the technical problem is a matter which supports the industry to develop slowly.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hydrogen circulating pump and fuel cell vehicle, the utility model discloses cancel synchronous gear completely, not needed lubricating oil, avoided the risk of oil leak to have the characteristics of small, high pressure ratio simultaneously.
In order to solve the above problem, the technical scheme of the utility model is that:
a hydrogen circulation pump comprising:
a drive motor;
the mounting seat is provided with a first annular flow channel cavity along the circumferential direction of the center, the upper part of the mounting seat of the first annular flow channel cavity is provided with an air suction port and an air exhaust port, and the first annular flow channel cavity is gradually narrowed from the air suction port to the air exhaust port;
a main shaft connected with an output shaft of the driving motor;
the bearing is arranged on the mounting seat and is in interference fit with the main shaft;
the impeller is in threaded connection with the main shaft, and blades of the impeller are of an arc structure;
the runner cover, with mount pad fixed connection, the runner cover is along being equipped with second annular runner chamber of central circumference, just second annular runner chamber with first annular runner chamber constitutes complete annular runner chamber, the second annular runner chamber is followed the induction port arrives the gas vent progressively narrows down, first annular runner chamber with second annular runner chamber will the blade parcel of impeller is in the annular runner intracavity.
In a preferred embodiment, in order to improve the efficiency of the circulating pump and prevent a small amount of fluid from shifting in the axial direction due to high pressure, a sealing groove structure is provided, that is, a groove is formed in the mounting seat along the circumferential direction of the center, the distance from the groove to the center of the mounting seat is smaller than the distance from the flow channel cavity to the center of the mounting seat, a boss is arranged on the impeller along the circumferential direction of the center, the boss is embedded into the groove to form the sealing groove structure, and a slight gap is left between the boss and the groove to avoid abrasion.
In a preferred embodiment, the bottom of the flow channel cavity is provided with a water storage tank, so that the phenomenon that trace water vapor in the circulating pump freezes to touch the impeller when the machine is stopped is avoided.
In a preferred embodiment, the hydrogen circulation pump further comprises a controller, and the controller is electrically connected with the driving motor and is used for controlling the start and stop of the driving motor.
In a preferred embodiment, a shaft sleeve is arranged between the mounting seat and the impeller, and the shaft sleeve is in interference fit with the main shaft.
In a preferred embodiment, the hydrogen circulating pump further comprises a sealing seat, the sealing seat is in interference fit with the mounting seat, and the mounting is carried out through the limitation of the bearing to ensure that the sealing seat is completely fixed on the mounting seat.
In a preferred embodiment, in order to avoid hydrogen from entering the driving motor, the hydrogen circulation pump further comprises a hydrogen seal, and the hydrogen seal is in interference fit with the seal seat.
The utility model also discloses a fuel cell vehicle, including the hydrogen circulating pump in the above-mentioned embodiment.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:
(1) the hydrogen circulating pump of the utility model designs the annular flow passage cavity which is specially used for hydrogen fluid, so that the hydrogen can always run along the annular flow passage cavity in the running process; the utility model discloses be circular arc blade structure with the blade design of impeller, both increased blade intensity and produced the parcel to the fluid when making the impeller rotate, prevent that the fluid from in a large number from going back to revealing on the fluid chamber that the blade is constituteed, be circular arc structure with the blade design, the pressure ratio is the highest 1.4 that can reach. The utility model discloses specifically include driving motor, main shaft, bearing, be equipped with mount pad, the impeller in first annular flow channel chamber, be equipped with the runner lid in second annular flow channel chamber, driving motor rotates and drives the main shaft, and the main shaft drives the impeller, produces centrifugal force and swirl power, and hydrogen gets into the annular flow channel chamber that specially sets up for the fluid from the induction port, and back hydrogen is wrapped up and is rotated the pressurization along with the runner is narrowed by each blade of impeller, arranges through the gas vent and sends into the rear end equipment. The utility model discloses the circulating pump has cancelled the synchronous gear of current circulating pump completely, does not need lubricating oil, has avoided the risk of oil leak to simple structure, the fault rate is low, safe and reliable, and is small.
(2) The utility model discloses be provided with the seal groove structure in the preferred embodiment on mount pad and impeller to leave micro-clearance between the seal groove, in order to avoid wearing and tearing, with this improvement circulating pump efficiency, prevent because the small amount of hydrogen that the high pressure leads to is to axle center direction drunkenness.
Drawings
Fig. 1 is a schematic structural diagram of a hydrogen circulation pump of the present invention;
fig. 2 is an exploded view of the hydrogen gas circulation pump of the present invention;
fig. 3 is a schematic structural diagram of a hydrogen circulation pump of the present invention;
FIG. 4 is a schematic view of the structure of the runner cavity of the present invention;
FIG. 5 is a schematic structural view of the sealing groove and the water storage tank of the present invention;
fig. 6 is a schematic structural view of a blade of an impeller according to the present invention;
fig. 7 is a partial enlarged view of I in fig. 6.
Description of reference numerals: 1-a controller; 2-driving the motor; 3-a main shaft; 4-a bearing; 5-hydrogen sealing; 6-mounting a base; 7-an impeller; 8-a flow channel cover; 9-pressing the gasket; 10-shaft sleeve; 11-a sealing seat; 13-a first annular flow passage cavity; 14-suction port; 15-an exhaust port; 16-a water storage tank; 17-sealing groove.
Detailed Description
The hydrogen circulation pump and the fuel cell vehicle according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims.
Example 1
The principle of the fuel cell automobile is that the hydrogen path and the oxygen path are in pressing force and flow ratio, and the hydrogen path and the oxygen path enter the fuel cell stack to carry out electrochemical reaction to finally generate water and electricity. Based on the principle, the hydrogen adopts a high-pressure hydrogen cylinder to provide pressurized hydrogen for the galvanic pile, and the oxygen path has higher oxygen content in the air, so that the air is directly extracted by an air compressor to enter the galvanic pile for reaction.
In the use of the fuel cell automobile, the main cost is hydrogen loss, and in the reaction process of the electric pile, partial hydrogen which is not completely reacted is discharged out of the electric pile, if the partial hydrogen can be recycled, the single hydrogenation endurance mileage of the fuel cell automobile is greatly increased, and the use cost is saved.
The hydrogen of the recovery part can be reduced in pressure due to the flow resistance of the galvanic pile reaction and the pipeline, and the hydrogen with low pressure can not be recovered and enters the galvanic pile for re-reaction, so that a hydrogen circulating pump is needed for secondary pressurization, and the hydrogen is recovered to the galvanic pile hydrogen inlet for re-reaction. In the recovery process, because of the sensitivity of the galvanic pile to oil, the circulating pump is required to exhaust absolutely no oil and has higher efficiency, the excessive electricity generated by the galvanic pile is prevented from being occupied by the circulating pump, the use efficiency of the automobile is improved,
referring to fig. 1, 2, and 3, the present embodiment provides a hydrogen circulation pump including: the device comprises a driving motor 2, a main shaft 3, a bearing 4, a mounting seat 6, an impeller 7 and a runner cover 8;
the output shaft of the driving motor 2 is connected with the main shaft 3, and the output shaft of the driving motor 2 is connected with the main shaft 3 in various ways, and can be connected through gears or adopting other connecting ways such as coupling connection and the like; the bearing 4 is in interference fit with the spindle 3, the mounting seat 6 is connected with the spindle 3 through the bearing 4, as shown in fig. 1 and fig. 2, the mounting seat 6 is fixedly connected with a shell of the driving motor 2 so as to fix the driving motor 2, the mounting seat 6 is provided with a first annular flow channel cavity 13 (as shown in fig. 4) along the central circumferential direction, the first annular flow channel cavity 13 is provided with an air suction port 14 and an air exhaust port 15 at the upper part of the mounting seat 6, and the flow channel cavity is gradually narrowed from the air suction port 14 to the air exhaust port 15; the impeller 7 is in threaded connection with the main shaft 3, in order to prevent the impeller 7 from disengaging from the shaft due to the loosening of the threads, a compression gasket 9 is added and is screwed by a bolt, and blades of the impeller 7 are in an arc structure (as shown in fig. 6 and 7); the flow channel cover 8 is fixedly connected with the mounting seat 6, a second annular flow channel cavity (not shown in the figure) is arranged on the flow channel cover 8 along the central circumferential direction, the second annular flow channel cavity and the first annular flow channel cavity 13 form a complete annular flow channel cavity, the second annular flow channel cavity is gradually narrowed from the air suction port 14 to the air exhaust port 15, and the first annular flow channel cavity 13 and the second annular flow channel cavity wrap the blades of the impeller 7 in the annular flow channel cavity.
The hydrogen circulating pump of the embodiment is designed with the annular flow channel cavity which is specially used for hydrogen fluid, so that hydrogen can always run along the annular flow channel cavity in the running process; it should be noted that it is an industry trend that the fuel cell automobile improves the use pressure ratio of the circulating pump, and the too high pressure ratio is a great test to the strength of the single thin blade, the flow efficiency of the straight blade under the high pressure ratio can also be greatly reduced, in order to solve these two problems, the embodiment designs the blade of the impeller 7 into the circular arc blade structure, which not only increases the strength of the blade but also wraps the fluid when the impeller 7 rotates, prevents the fluid from leaking back from the fluid cavity formed by the blades in a large amount, and designs the blade into the circular arc structure, and the pressure ratio can reach 1.4 at most. The embodiment specifically comprises a driving motor 2, a spindle 3, a bearing 4, a mounting seat 6 provided with a first annular flow passage cavity 13, an impeller 7, and a flow passage cover 8 provided with a second annular flow passage cavity, wherein the driving motor 2 rotates to drive the spindle 3, the spindle 3 drives the impeller 7 to generate centrifugal force and vortex force, hydrogen enters the flow passage cavity specially designed for fluid from an air suction port 14, and then is wrapped by each blade of the impeller 7 and rotates and pressurizes along with the narrowing of the annular flow passage, and the hydrogen is discharged through an air outlet 15 and sent into rear-end equipment. The utility model discloses the circulating pump has cancelled the synchronous gear of current circulating pump completely, does not need lubricating oil, has avoided the risk of oil leak to simple structure, the fault rate is low, safe and reliable, and is small.
Referring to fig. 5, in a preferred embodiment, in order to improve the efficiency of the circulation pump and prevent a small amount of fluid from shifting in the axial direction due to high pressure, a seal groove 17 structure is provided, that is, a groove is formed in the mounting seat 6 along the central circumferential direction, the distance from the groove to the center of the mounting seat 6 is smaller than the distance from the flow channel cavity to the center of the mounting seat 6, the impeller 7 is provided with a boss along the central circumferential direction, the boss is embedded into the groove to form the seal groove 17 structure, and a slight gap is left between the boss and the groove in a matching manner so as to avoid abrasion.
Referring to fig. 5, in a preferred embodiment, a water storage tank 16 is arranged at the bottom of the flow passage cavity to prevent a small amount of water vapor inside the circulating pump from being frozen and contacting the impeller 7 during shutdown.
It should be noted that the circulating pump is when using below 0 degree centigrade, there is freezing of inside steam, lead to the damage problem that ice and blade collided in the twinkling of an eye that starts, consequently a basin 16 is seted up to this embodiment in the bottom in runner chamber, minute quantity steam is through the dead weight along the basin 16 that the runner flows and put the minimum when making the circulating pump shut down, avoid bumping into impeller 7 when shutting down and icing, after the circulating pump is restarted for a period, self-heating through the motor melts ice, at last along with hydrogen discharge circulating pump, thereby use in circulation.
Referring to fig. 1 and 2, in a preferred embodiment, the hydrogen circulation pump further includes a controller 1, and the controller 1 is electrically connected to the driving motor 2 and is configured to control start and stop of the driving motor 2.
Referring to fig. 1, in a preferred embodiment, a bushing 10 is provided between the mounting seat 6 and the impeller 7, the bushing 10 being in interference fit with the main shaft 3.
Referring to fig. 1, in a preferred embodiment, the hydrogen circulation pump further includes a sealing seat 11, the sealing seat 11 is in interference fit with the mounting seat 6, and the installation is limited by the bearing 4 to ensure that the sealing seat 11 is completely fixed on the mounting seat 6.
Referring to fig. 1, in a preferred embodiment, in order to prevent hydrogen from entering into the driving motor 2, the hydrogen circulation pump further includes a hydrogen seal 5, and the hydrogen seal 5 is in interference fit with the seal seat 11.
Example 2
The present embodiment provides a fuel cell vehicle including the hydrogen circulation pump described in embodiment 1.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, the changes are still within the scope of the present invention if they fall within the scope of the claims and their equivalents.
Claims (8)
1. A hydrogen circulation pump, characterized by comprising:
a drive motor;
the mounting seat is provided with a first annular flow channel cavity along the circumferential direction of the center, the upper part of the mounting seat of the first annular flow channel cavity is provided with an air suction port and an air exhaust port, and the first annular flow channel cavity is gradually narrowed from the air suction port to the air exhaust port;
a main shaft connected with an output shaft of the driving motor;
the bearing is arranged on the mounting seat and is in interference fit with the main shaft;
the impeller is in threaded connection with the main shaft, and blades of the impeller are of an arc structure;
the runner cover, with mount pad fixed connection, the runner cover is along being equipped with second annular runner chamber of central circumference, just second annular runner chamber with first annular runner chamber constitutes complete annular runner chamber, the second annular runner chamber is followed the induction port arrives the gas vent progressively narrows down, first annular runner chamber with second annular runner chamber will the blade parcel of impeller is in the annular runner intracavity.
2. The hydrogen circulation pump of claim 1, wherein the mounting seat is provided with a groove along the circumferential direction of the center, the distance from the groove to the center of the mounting seat is smaller than the distance from the flow channel cavity to the center of the mounting seat, and the impeller is provided with a boss along the circumferential direction of the center, and the boss is embedded in the groove to form a sealing groove structure.
3. The hydrogen circulation pump according to claim 1, wherein a water reservoir is provided at the bottom of the flow channel chamber.
4. The hydrogen circulation pump of claim 1, further comprising a controller electrically connected to the drive motor for controlling the start and stop of the drive motor.
5. The hydrogen circulation pump of claim 1, wherein a shaft sleeve is arranged between the mounting seat and the impeller, and the shaft sleeve is in interference fit with the main shaft.
6. The hydrogen circulation pump of claim 1, further comprising a seal seat in interference fit with the mounting seat.
7. The hydrogen circulation pump of claim 6, further comprising a hydrogen seal in interference fit with the seal seat.
8. A fuel cell vehicle characterized by comprising the hydrogen circulation pump of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920790908.5U CN210033890U (en) | 2019-05-29 | 2019-05-29 | Hydrogen circulating pump and fuel cell vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920790908.5U CN210033890U (en) | 2019-05-29 | 2019-05-29 | Hydrogen circulating pump and fuel cell vehicle |
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| Publication Number | Publication Date |
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| CN210033890U true CN210033890U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920790908.5U Active CN210033890U (en) | 2019-05-29 | 2019-05-29 | Hydrogen circulating pump and fuel cell vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259760A (en) * | 2020-10-12 | 2021-01-22 | 苏州瑞驱电动科技有限公司 | Integrated hydrogen circulating pump in fuel cell system |
| CN114689671A (en) * | 2022-03-29 | 2022-07-01 | 嘉庚创新实验室 | Electrochemical reaction apparatus |
-
2019
- 2019-05-29 CN CN201920790908.5U patent/CN210033890U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259760A (en) * | 2020-10-12 | 2021-01-22 | 苏州瑞驱电动科技有限公司 | Integrated hydrogen circulating pump in fuel cell system |
| CN114689671A (en) * | 2022-03-29 | 2022-07-01 | 嘉庚创新实验室 | Electrochemical reaction apparatus |
| CN114689671B (en) * | 2022-03-29 | 2023-05-16 | 嘉庚创新实验室 | Electrochemical reaction apparatus |
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