CN116576109A - Hydrogen circulating pump for fuel cell - Google Patents
Hydrogen circulating pump for fuel cell Download PDFInfo
- Publication number
- CN116576109A CN116576109A CN202310664344.1A CN202310664344A CN116576109A CN 116576109 A CN116576109 A CN 116576109A CN 202310664344 A CN202310664344 A CN 202310664344A CN 116576109 A CN116576109 A CN 116576109A
- Authority
- CN
- China
- Prior art keywords
- motor
- shaft
- shell
- pump
- driving shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000001257 hydrogen Substances 0.000 title claims abstract description 53
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 53
- 239000000446 fuel Substances 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000004891 communication Methods 0.000 claims abstract description 27
- 239000004033 plastic Substances 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000003365 glass fiber Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008014 freezing Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 5
- 239000012208 gear oil Substances 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/06—Silencing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/124—Sealing of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of fuel cells, in particular to a hydrogen circulating pump for a fuel cell. Including motor housing and pump case and bearing frame, install the terminal box on the motor housing, be equipped with terminal seal structure in the terminal box, be equipped with stator, rotor and motor shaft in the motor housing, the motor shaft is connected through grafting location structure with the driving shaft in the gear chamber, and grafting location structure is used for carrying out radial positioning between motor shaft and the driving shaft, is equipped with air inlet and gas outlet on the pump case, the position that the pump case inner wall is located the gas outlet both sides is equipped with the intercommunication groove respectively, and intercommunication groove one side leads to the gas outlet, and the opposite side leads to the arc inner wall bottom position of pump case. The water left at the bottom of the arc-shaped inner wall of the pump shell can be discharged to the air outlet through the communication groove, so that the water is prevented from leaving the freezing rotor in the pump shell, the ice breaking effect is improved, the noise generated by concentrated backflow impact of high-pressure gas can be reduced, and the airtight performance of the hydrogen circulating pump is improved through the binding post sealing structure.
Description
Technical field:
the invention relates to the technical field of fuel cells, in particular to a hydrogen circulating pump for a fuel cell.
The background technology is as follows:
the hydrogen circulating pump is mainly used for pressurizing and recycling hydrogen-containing mixed gas exhausted by the fuel cell, wherein the pump head is used as a main pressurizing component of the hydrogen circulating pump, the structure of the hydrogen circulating pump is as disclosed in patent application with publication number of CN217327672U, the structure of the pump head of the gas compressor is disclosed, the hydrogen-containing mixed gas enters the pump shell from the air inlet of the pump head, a driving rotor and a driven rotor are arranged in the pump shell, the shape of the inner wall of the pump shell is designed into an arc-shaped inner wall matched with the rotation of the driving rotor and the driven rotor, the hydrogen-containing mixed gas is pressurized under the cooperation of the inner wall of the pump shell, the driving rotor and the driven rotor, and finally the hydrogen-containing mixed gas is exhausted outwards from the air outlet of the pump head. In the pressurizing process, on one hand, because a large amount of water vapor is contained in the hydrogen-containing mixed gas, the water vapor is easily condensed into water and accumulated at the arc bottom of the pump shell so as not to be discharged, when the temperature is too low in winter, the water can be frozen into ice so as to freeze the driving rotor or the driven rotor, and when the motor is started at low temperature, the driving rotor is not rotated, so that the motor is blocked, the service life of the motor is influenced, and the use requirement of a low-temperature environment is not met. On the other hand, the pressure of the gas in the pump shell is gradually increased from the gas inlet to the gas outlet, so that a cavity close to the gas outlet belongs to a high-pressure cavity, the pressure of the gas is higher than that of other positions in the pump shell, and when the blades of the driving rotor or the driven rotor rotate to the gas outlet, part of the high-pressure gas can flow back to form impact, so that larger noise is generated, and the noise reduction effect of the hydrogen circulating pump is influenced.
Hydrogen is inflammable and explosive gas, so the requirement of the hydrogen circulating pump on the self air tightness is very strict. In the working process of the hydrogen circulating pump, part of mixed gas containing hydrogen leaks into a motor cavity from a pump head, and the junction box of the current motor is troublesome in wiring and poor in tightness, hydrogen leakage points are more, hydrogen is easy to leak outwards from a gap of the junction box, and the gas tightness of the hydrogen circulating pump is influenced by the fact that the hydrogen is easy to leak outwards from a gap inside a shielding layer of a shielding cable between a rubber sheet and a copper wire of a three-phase line, so that the potential safety hazard of inflammability and explosiveness is formed.
And if the publication number is CN114776592A, the name is a plastic-coated rotor hydrogen circulating pump with an ice breaking function, the hydrogen circulating pump structure is disclosed, wherein a motor shaft is connected with a driving shaft of a pump head through a pin coupler, in particular the pin coupler is fixed on the motor shaft, the pin coupler is connected with a driving gear, and the driving gear drives the driving shaft to rotate. The connecting mode is complicated in structure, the pin coupler is added, so that the overall axial length is increased, the motor shaft and the driving shaft are supported by two bearings respectively, the volume of the gear chamber is increased, and the consumption of gear oil is increased.
Therefore, the above-mentioned problems of the hydrogen circulation pump have become a technical problem to be solved in the industry.
The invention comprises the following steps:
the invention provides a hydrogen circulating pump for a fuel cell, which solves the problems that water freezes a rotor when accumulating at low temperature at the arc bottom of a pump shell, part of gas at an air outlet in the pump shell flows back to form impact and increase noise, part of mixed gas containing hydrogen leaks outwards from a gap of a junction box, and the problems of complex structure, increased axial size and increased gear oil consumption when being connected through a pin coupling in the past.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the hydrogen circulating pump for the fuel cell comprises a motor shell, a pump shell and a bearing seat between the motor shell and the pump shell, wherein a junction box is arranged on the motor shell, a wiring post sealing structure is arranged in the junction box, a gear chamber is arranged between the bearing seat and the pump shell, a stator, a rotor and a motor shaft are arranged in the motor shell, a driving gear and a driven gear are arranged in the gear chamber, a driving shaft and a driven shaft are arranged in the pump shell, one end of the motor shaft is supported by a first bearing in the motor shell, the other end of the motor shaft is supported by a second bearing in the bearing seat, an oil seal is arranged between the motor shaft and the bearing seat, the motor shaft is connected with the driving shaft in the gear chamber through an inserting positioning structure, the inserting positioning structure is used for radially positioning the motor shaft and the driving shaft, the driving gear is arranged on the driving shaft, the middle part of the driving shaft is supported by a third bearing in the pump shell, the other end of the driving shaft is suspended and provided with a driving rotor, the driven gear is arranged on the driven shaft, one end of the driven shaft is supported by a fourth bearing in the bearing seat, the middle part of the driven shaft is supported by a fifth bearing in the pump shell, the other end of the driven shaft is suspended and is provided with a driven rotor, and an oil seal is arranged between the driving shaft and the driven shaft is provided; the pump shell is provided with an air inlet and an air outlet, the positions of the inner wall of the pump shell, which are positioned on the two sides of the air outlet, are respectively provided with a communication groove, one side of each communication groove is communicated with the air outlet, the other side of each communication groove is communicated with the bottom of the arc-shaped inner wall of the pump shell, the communication grooves are used for discharging water remained at the bottom of the arc-shaped inner wall of the pump shell to the air outlet, and part of high-pressure gas used for the air outlet in the communication grooves flows back in advance to reduce pressure difference noise.
The binding post sealing structure comprises a mounting groove arranged on the motor shell, an inner plastic plug-in unit is arranged in the mounting groove, a plurality of inner binding posts are arranged in the inner plastic plug-in unit, and the inner binding posts are connected with a motor stator outgoing line; an outer plastic plug-in unit is arranged in the junction box, a plurality of outer wiring terminals are arranged in the outer plastic plug-in unit, the outer wiring terminals are connected with the outer outgoing lines, and the inner plastic plug-in unit and the inner wiring terminals are aligned with the positions of the outer plastic plug-in unit and the outer wiring terminals; the inner wiring terminal is connected with the outer wiring terminal through a plurality of binding posts, an insulating sealing sleeve is sleeved outside the binding posts, a metal framework is arranged outside the insulating sealing sleeve, and a sealing ring is arranged between the metal framework and the side wall of the wiring box.
A sealing ring is arranged between the motor shell and the junction box, the outgoing line of the motor stator penetrates through a through hole in the motor shell to be connected with the inner wiring terminal, the binding post is connected with the inner wiring terminal and the outer wiring terminal in a clamping manner, and the binding post comprises a copper post or an aluminum post.
The bottom of the metal framework is conical, and the inner wall of the junction box is provided with a conical surface matched with the junction box.
The insulating sealing sleeve adopts a glass fiber sleeve, and the glass fiber sleeve is respectively combined with the binding post at the inner side and the metal framework at the outer side into a whole through glass sintering.
The communication groove is arranged obliquely downwards from the bottom of the arc-shaped inner wall of the pump shell to the direction of the air outlet, and the communication groove is an open groove.
The air inlet is arranged at the top of the pump shell, and the air outlet is arranged at the bottom of the pump shell.
The inserting positioning structure comprises an inserting hole arranged at the end part of the motor shaft, a pin shaft is inserted in the inserting hole along the radial direction, and the end part of the driving shaft is inserted into the inserting hole and is provided with a slot in clearance fit with the pin shaft.
The plug-in positioning structure comprises a jack arranged at the end part of a motor shaft, a plurality of plug posts are arranged at the outer side of the jack, and a plug inserted into the jack and a slot in clearance fit with the plug posts are arranged at the end part of the driving shaft.
The plug-in positioning structure comprises a jack arranged at the end part of the motor shaft, the jack is provided with a polygonal groove, and the end part of the driving shaft is provided with a polygonal plug in clearance fit with the polygonal groove.
The invention adopts the scheme and has the following advantages:
the communicating grooves are respectively arranged at the positions of the two sides of the air outlet on the inner wall of the pump shell, so that water left at the bottom of the arc-shaped inner wall of the pump shell can be discharged to the air outlet through the communicating grooves, the water is prevented from remaining in the pump shell, the problem that the driving rotor or the driven rotor is frozen and not rotated when the temperature is too low is avoided, the motor is protected, and the motor is suitable for use requirements of a low-temperature environment; the communication groove can enable partial high-pressure gas at the gas outlet to flow back to the low-pressure cavity in advance, so that the pressure difference lower than that between the cavity and the high-pressure cavity is reduced, the noise generated by concentrated backflow impact of the high-pressure gas is reduced, and the noise reduction effect of the hydrogen circulating pump is improved.
The motor stator outgoing line is connected with the inner terminal, the outer outgoing line is connected with the outer terminal, and the inner terminal is connected with the outer terminal through a plurality of binding posts, so that the motor stator outgoing line can be completely sealed in a motor cavity, and the possibility that hydrogen leaks outwards from gaps between rubber sheets and copper wires of three-phase wires and inside a shielding layer of a shielding cable is avoided; on the other hand, be equipped with the sealing washer between metal skeleton and terminal box lateral wall, be equipped with the sealing washer between motor housing and terminal box, avoided hydrogen-containing mixed gas to outwards leak from the gap, wholly promoted the airtight performance of hydrogen circulating pump, eliminated inflammable and explosive potential safety hazard.
The motor shaft is directly connected with the driving shaft through the plug-in positioning structure, so that radial positioning is carried out between the motor shaft and the driving shaft, a traditional pin coupler is omitted, the motor shaft can directly drive the driving shaft to rotate, the structure is simplified, the axial size is reduced, the driving shaft is supported by only one bearing, the cost is reduced, the size of a gear chamber is reduced, and the consumption of gear oil is reduced. In addition, clearance fit between motor shaft and the driving shaft, the motor shaft idle rotation certain angle forms moment of torsion inertia impact force and reaches the dynamics of breaking ice earlier when starting, then drives the driving shaft rotation again, and the driving shaft drives the rotation of driving rotor again, does benefit to the promotion effect of breaking ice.
Description of the drawings:
fig. 1 is a schematic cross-sectional view of the present invention.
Fig. 2 is a schematic perspective view of a pump head according to the present invention.
Fig. 3 is a schematic perspective view of a post sealing structure according to the present invention.
FIG. 4 is a schematic cross-sectional view of the post sealing structure of the present invention.
Fig. 5 is a schematic perspective view of an embodiment 1 of a plugging positioning structure according to the present invention.
Fig. 6 is a schematic perspective view of an embodiment 2 of a plugging positioning structure according to the present invention.
Fig. 7 is a schematic perspective view of an embodiment 3 of a plugging positioning structure according to the present invention.
Fig. 8 is a schematic perspective view of an embodiment 4 of a plugging positioning structure according to the present invention.
Fig. 9 is a schematic perspective view of an embodiment 5 of the plugging positioning structure of the present invention.
In the figure, 1, a motor housing, 2, a pump housing, 3, a bearing seat, 4, a junction box, 5, a stator, 6, a rotor, 7, a motor shaft, 8, a driving gear, 9, a driven gear, 10, a driving shaft, 11, a driven shaft, 12, a first bearing, 13, a second bearing, 14, an oil seal, 15, a third bearing, 16, a driving rotor, 17, a fourth bearing, 18, a fifth bearing, 19, a driven rotor, 20, an oil seal, 21, an air inlet, 22, an air outlet, 23, a communication groove, 24, an installation groove, 25, an inner plastic insert, 26, an inner plastic insert, 27, an outer plastic insert, 28, an outer plastic insert, 29, an outer lead, 30, a binding post, 31, a metal skeleton, 32, a sealing ring, 33, an insulating sealing sleeve, 34, an insertion hole, 35, a pin, 36, an insertion groove, 37, an insertion post, 38, a plug, 39, a polygonal plug, 40, a spline hole, 41, a spline, 42, a flat post, 43, a groove, 44, and a flat head.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-4, a hydrogen circulation pump for a fuel cell comprises a motor shell 1, a pump shell 2 and a bearing seat 3 between the motor shell and the pump shell, wherein a junction box 4 is installed on the motor shell 1, a binding post sealing structure is arranged in the junction box 4, a gear chamber is arranged between the bearing seat 3 and the pump shell 2, a stator 5, a rotor 6 and a motor shaft 7 are arranged in the motor shell 1, a driving gear 8 and a driven gear 9 are arranged in the gear chamber, a driving shaft 10 and a driven shaft 11 are arranged in the pump shell 2, one end of the motor shaft 7 is supported by a first bearing 12 in the motor shell 1, the other end is supported by a second bearing 13 in the bearing seat 3, an oil seal 14 is arranged between the motor shaft 7 and the bearing seat 3, the motor shaft 7 is connected with the driving shaft 10 in a splicing positioning structure for radially positioning the motor shaft 7 and the driving shaft 10, the driving gear 8 is installed on the driving shaft 10, the middle part of the driving shaft 10 is supported by a third bearing 15 in the pump shell 2, the other end of the driving shaft 10 is suspended and is installed with a rotor 16, the driven gear 9 is installed on the driven shaft 11, one end of the driven shaft 11 is supported by a fourth bearing 17 in the bearing seat 3, one end of the driven shaft is supported by a middle part of the driven shaft 11 is supported by a fifth bearing 11 in the bearing 11 and is installed between the driven shaft 11 and the driven shaft 11 is provided with a fifth bearing 11 and a suspension bearing 20 is installed between the driven shaft 11 and the driven shaft 11 is installed; the pump shell 2 is provided with an air inlet 21 and an air outlet 22, the positions, located on two sides of the air outlet 22, of the inner wall of the pump shell 2 are respectively provided with one or more communication grooves 23, one side of each communication groove 23 is communicated with the air outlet 22, the other side of each communication groove 23 is communicated with the bottom of the arc-shaped inner wall of the pump shell, the communication grooves 23 are used for discharging water remained at the bottom of the arc-shaped inner wall of the pump shell 2 to the air outlet 22, and part of high-pressure gas used for the air outlet by the communication grooves 23 flows back in advance to reduce pressure difference noise.
During operation, the motor shaft 7 directly drives the driving shaft 10 to rotate through the plug-in positioning structure, the driving shaft 10 drives the driving gear 8 and the driving rotor 16 on the driving shaft to rotate, the driving gear 8 drives the driven gear 9 to rotate, the driven gear 9 drives the driven shaft 11 and the driven rotor 19 to rotate, and the driving rotor 16 and the driven rotor 19 cooperate to realize the pressurization of gas. The traditional pin coupling is omitted, the axial size is reduced, the volume of a gear chamber is reduced, and the consumption of gear oil is reduced.
As shown in fig. 5, the plugging positioning structure comprises a jack 34 arranged at the end of the motor shaft 7, a pin 35 is plugged into the jack 34 along the radial direction, the end of the driving shaft 10 is plugged into the jack 34, the unbalanced load force can be borne, and a slot 36 in clearance fit with the pin 35 is arranged. When the motor shaft 7 rotates, the motor shaft rotates at a certain angle in an idle mode to form torque inertia impact force to achieve ice breaking force, and then the driving shaft 10 is driven to rotate through the cooperation of the pin shaft 35 and the slot 36, and the driving shaft 10 drives the driving rotor to rotate, so that ice breaking effect is improved.
As shown in fig. 6, the plugging positioning structure comprises a jack arranged at the end part of the motor shaft 7, a plurality of plug posts 37 are arranged at the outer side of the jack, a plug 38 inserted into the jack is arranged at the end part of the driving shaft 10, and the plug slot 36 is capable of bearing unbalanced load force and is in clearance fit with the plug posts 37. When the motor shaft 7 rotates, the motor shaft rotates at a certain angle in an idle mode to form torque inertia impact force to achieve ice breaking force, and then the driving shaft 10 is driven to rotate through the cooperation of the inserted column 37 and the slot 36, and the driving shaft 10 drives the driving rotor to rotate, so that ice breaking effect is improved.
As shown in fig. 7, the plugging positioning structure includes a jack disposed at the end of the motor shaft 7, the jack is provided with a polygonal slot, the end of the driving shaft 10 is provided with a polygonal plug 39 in clearance fit with the polygonal slot, so as to bear unbalanced load force, when the motor shaft 7 rotates, firstly rotates at a certain angle in idle load to form torque inertia impact force to achieve ice breaking force, and then drives the driving shaft 10 to rotate through cooperation of the polygonal plug 39 and the polygonal slot, and the driving shaft 10 drives the driving rotor to rotate, thereby facilitating improvement of ice breaking effect.
As shown in fig. 8, the plug-in positioning structure includes a spline hole 40 provided at the end of the motor shaft 7, a spline 41 in clearance fit with the spline hole 40 is provided at the end of the driving shaft 10, the spline 41 is inserted into the spline hole 40 to bear unbalanced load force, when the motor shaft 7 rotates, the torque inertial impact force is formed by idle rotation at a certain angle to achieve ice breaking force, and then the driving shaft 10 is driven to rotate through the cooperation of the spline hole 40 and the spline 41, and the driving shaft 10 drives the driving rotor to rotate, thereby facilitating the improvement of ice breaking effect.
As shown in fig. 9, the plugging positioning structure includes a jack provided at an end of the motor shaft 7, two flat posts 42 are provided at an outer side of the jack, a flat groove 43 is formed between the two flat posts 42, a plug inserted into the jack is provided at an end of the driving shaft 10, and a flat head 44 capable of bearing unbalanced load force and being in clearance fit with the flat groove 43 is provided at an end of the driving shaft. When the motor shaft 7 rotates, the motor shaft rotates at a certain angle in an idle mode to form torque inertia impact force to achieve ice breaking force, and then the flat groove 43 and the flat head 44 are matched to drive the driving shaft 10 to rotate, and the driving shaft 10 drives the driving rotor to rotate, so that ice breaking effect is improved.
The binding post sealing structure comprises a mounting groove 24 arranged on the motor shell 1, an inner plastic plug-in unit 25 is arranged in the mounting groove 24, a plurality of inner binding posts 26 are arranged in the inner plastic plug-in unit 25, and the inner binding posts 26 are connected with outgoing lines of the motor stator; an outer plastic plug-in 27 is arranged in the junction box 4, a plurality of outer wiring terminals 28 are arranged in the outer plastic plug-in 27, the outer wiring terminals 28 are connected with an outer outgoing line 29, and the positions of the inner plastic plug-in 25 and the inner wiring terminals 26 are aligned with the positions of the outer plastic plug-in 27 and the outer wiring terminals 28, so that the installation of binding posts 30 is facilitated; the inner wiring terminal 26 is connected with the outer wiring terminal 28 through a plurality of wiring terminals 30, an insulating sealing sleeve 33 is sleeved outside the wiring terminals 30, a metal framework 31 is arranged outside the insulating sealing sleeve 33, a sealing ring 32 is arranged between the metal framework 31 and the side wall of the wiring box 4, and the hydrogen-containing mixed gas is prevented from leaking outwards from a gap between the metal framework 31 and the side wall of the wiring box 4.
The motor is characterized in that a sealing ring 32 is arranged between the motor shell 1 and the junction box 4 to prevent the hydrogen-containing mixed gas from leaking outwards from a gap between the motor shell 1 and the junction box 4, a motor stator outgoing line penetrates out of a through hole in the motor shell 1 to be connected with the inner terminal 26, the binding post 30 is connected with the inner terminal 26 and the outer terminal 28 in a clamping manner, and the binding post 30 comprises a copper column or an aluminum column and other metal materials and other conductive materials.
The bottom of metal skeleton 31 is the toper, terminal box 4 inner wall be equipped with rather than matched with conical surface, be convenient for install inseparabler between metal skeleton 31 and the terminal box 4, reinforcing sealed effect.
The insulating sealing sleeve 33 is a glass fiber sleeve, which has good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength, and is respectively combined with the binding post 30 on the inner side and the metal framework 31 on the outer side into a whole through glass sintering, so that the sealing and insulating effects are achieved, and the outward leakage of hydrogen-containing mixed gas from gaps between the glass fiber sleeve and the binding post 30 and between the glass fiber sleeve and the metal framework 31 is prevented.
The principle of a binding post sealing structure is as follows:
the motor stator outgoing line is connected with the inner wiring terminal 26, the outer outgoing line 29 is connected with the outer wiring terminal 28, the inner wiring terminal 26 is connected with the outer wiring terminal 28 through a plurality of wiring terminals 30, and the wiring terminals 30 play a role in conducting communication, so that on one hand, the traditional wiring mode is changed, the wiring is simpler and more convenient, the motor stator outgoing line can be completely sealed in a motor cavity, and the possibility of outward leakage of hydrogen from gaps between rubber sheets of three phase lines and copper wires and inside a shielding layer of a shielding cable is avoided; on the other hand, the insulating sealing sleeve 33 is respectively combined with the binding post 30 and the metal framework 31 into a whole, so that the hydrogen-containing mixed gas is prevented from leaking outwards from the gaps between the insulating sealing sleeve 33 and the binding post 30 and between the insulating sealing sleeve 33 and the metal framework 31, the sealing ring 32 is arranged between the metal framework 31 and the side wall of the junction box 4, the hydrogen-containing mixed gas is prevented from leaking outwards from the gaps between the metal framework 31 and the side wall of the junction box 4, the sealing ring 32 is arranged between the motor housing 1 and the junction box 4, the hydrogen-containing mixed gas is prevented from leaking outwards from the gaps between the motor housing 1 and the junction box 4, all leakage points are sealed, and the airtight performance of the hydrogen circulation pump is integrally improved.
The communication groove 23 is arranged obliquely downwards from the bottom position of the arc-shaped inner wall of the pump shell 2 to the direction of the air outlet 22, and the communication groove 23 is an open groove.
The air inlet 21 is arranged at the top of the pump shell 2, and the air outlet 22 is arranged at the bottom of the pump shell 2.
Communication groove theory of operation:
in operation, the hydrogen-containing mixed gas enters the pump shell 2 from the gas inlet 21, is pressurized by high-speed rotation of the driving rotor 16 and the driven rotor 19, and is discharged outwards from the gas outlet 22. The communicating grooves 23 on the two sides of the air outlet 22 can timely discharge water remained at the bottom of the arc-shaped inner wall of the pump shell 2 to the air outlet 22 on one hand, so that the water is prevented from being remained in the pump shell 2, the problem that the driving rotor 16 or the driven rotor 19 is frozen and not rotated when the temperature is too low is avoided, the motor is protected, and the motor is suitable for use requirements of low-temperature environments; the communication groove 23 can enable part of high-pressure gas at the gas outlet 22 to flow back to the low-pressure cavity in advance, so that the pressure difference lower than that between the cavity and the high-pressure cavity is reduced, noise generated by concentrated backflow impact of the high-pressure gas is reduced, and the noise reduction effect of the hydrogen circulating pump is improved.
The above embodiments are not to be taken as limiting the scope of the invention, and any alternatives or modifications to the embodiments of the invention will be apparent to those skilled in the art and fall within the scope of the invention.
The present invention is not described in detail in the present application, and is well known to those skilled in the art.
Claims (10)
1. A hydrogen circulation pump for a fuel cell, characterized in that: the motor comprises a motor shell, a pump shell and a bearing seat between the motor shell, wherein a junction box is arranged on the motor shell, a binding post sealing structure is arranged in the junction box, a gear chamber is arranged between the bearing seat and the pump shell, a stator, a rotor and a motor shaft are arranged in the motor shell, a driving gear and a driven gear are arranged in the gear chamber, a driving shaft and a driven shaft are arranged in the pump shell, one end of the motor shaft is supported by a first bearing in the motor shell, the other end of the motor shaft is supported by a second bearing in the bearing seat, an oil seal is arranged between the motor shaft and the bearing seat, the motor shaft is connected with the driving shaft in the gear chamber by an inserting positioning structure, the inserting positioning structure is used for radially positioning the motor shaft and the driving shaft, the driving gear is arranged on the driving shaft, the middle part of the driving shaft is supported by a third bearing in the pump shell, the other end of the driving shaft is suspended and provided with a driving rotor, one end of the driven gear is arranged on the driven shaft, one end of the driven shaft is supported by a fourth bearing in the bearing seat, the middle part of the driven shaft is supported by a fifth bearing in the pump shell, the other end of the driven shaft is suspended and is provided with a driven rotor, and an oil seal is arranged between the driving shaft and the driving shaft is provided with the driving shaft; the pump shell is provided with an air inlet and an air outlet, the positions of the inner wall of the pump shell, which are positioned on the two sides of the air outlet, are respectively provided with a communication groove, one side of each communication groove is communicated with the air outlet, the other side of each communication groove is communicated with the bottom of the arc-shaped inner wall of the pump shell, the communication grooves are used for discharging water remained at the bottom of the arc-shaped inner wall of the pump shell to the air outlet, and part of high-pressure gas used for the air outlet in the communication grooves flows back in advance to reduce pressure difference noise.
2. A hydrogen circulation pump for a fuel cell according to claim 1, wherein: the binding post sealing structure comprises a mounting groove arranged on the motor shell, an inner plastic plug-in unit is arranged in the mounting groove, a plurality of inner binding posts are arranged in the inner plastic plug-in unit, and the inner binding posts are connected with a motor stator outgoing line; an outer plastic plug-in unit is arranged in the junction box, a plurality of outer wiring terminals are arranged in the outer plastic plug-in unit, the outer wiring terminals are connected with the outer outgoing lines, and the inner plastic plug-in unit and the inner wiring terminals are aligned with the positions of the outer plastic plug-in unit and the outer wiring terminals; the inner wiring terminal is connected with the outer wiring terminal through a plurality of binding posts, an insulating sealing sleeve is sleeved outside the binding posts, a metal framework is arranged outside the insulating sealing sleeve, and a sealing ring is arranged between the metal framework and the side wall of the wiring box.
3. A hydrogen circulation pump for a fuel cell according to claim 2, characterized in that: a sealing ring is arranged between the motor shell and the junction box, the outgoing line of the motor stator penetrates through a through hole in the motor shell to be connected with the inner wiring terminal, the binding post is connected with the inner wiring terminal and the outer wiring terminal in a clamping manner, and the binding post comprises a copper post or an aluminum post.
4. A hydrogen circulation pump for a fuel cell according to claim 2, characterized in that: the bottom of the metal framework is conical, and the inner wall of the junction box is provided with a conical surface matched with the junction box.
5. A hydrogen circulation pump for a fuel cell according to claim 2, characterized in that: the insulating sealing sleeve adopts a glass fiber sleeve, and the glass fiber sleeve is respectively combined with the binding post at the inner side and the metal framework at the outer side into a whole through glass sintering.
6. A hydrogen circulation pump for a fuel cell according to claim 1, wherein: the communication groove is arranged obliquely downwards from the bottom of the arc-shaped inner wall of the pump shell to the direction of the air outlet, and the communication groove is an open groove.
7. A hydrogen circulation pump for a fuel cell according to claim 1, wherein: the air inlet is arranged at the top of the pump shell, and the air outlet is arranged at the bottom of the pump shell.
8. A hydrogen circulation pump for a fuel cell according to claim 1, wherein: the inserting positioning structure comprises an inserting hole arranged at the end part of the motor shaft, a pin shaft is inserted in the inserting hole along the radial direction, and the end part of the driving shaft is inserted into the inserting hole and is provided with a slot in clearance fit with the pin shaft.
9. A hydrogen circulation pump for a fuel cell according to claim 1, wherein: the plug-in positioning structure comprises a jack arranged at the end part of a motor shaft, a plurality of plug posts are arranged at the outer side of the jack, and a plug inserted into the jack and a slot in clearance fit with the plug posts are arranged at the end part of the driving shaft.
10. A hydrogen circulation pump for a fuel cell according to claim 1, wherein: the plug-in positioning structure comprises a jack arranged at the end part of the motor shaft, the jack is provided with a polygonal groove, and the end part of the driving shaft is provided with a polygonal plug in clearance fit with the polygonal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310664344.1A CN116576109A (en) | 2023-06-05 | 2023-06-05 | Hydrogen circulating pump for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310664344.1A CN116576109A (en) | 2023-06-05 | 2023-06-05 | Hydrogen circulating pump for fuel cell |
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| Publication Number | Publication Date |
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| CN116576109A true CN116576109A (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310664344.1A Pending CN116576109A (en) | 2023-06-05 | 2023-06-05 | Hydrogen circulating pump for fuel cell |
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| CN (1) | CN116576109A (en) |
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