CN115030896B - Leak protection oil claw formula hydrogen circulating pump - Google Patents
Leak protection oil claw formula hydrogen circulating pump Download PDFInfo
- Publication number
- CN115030896B CN115030896B CN202210725626.3A CN202210725626A CN115030896B CN 115030896 B CN115030896 B CN 115030896B CN 202210725626 A CN202210725626 A CN 202210725626A CN 115030896 B CN115030896 B CN 115030896B
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- China
- Prior art keywords
- bearing
- oil
- cavity
- oil seal
- bearing seat
- 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.)
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 50
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 50
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 210000000078 claw Anatomy 0.000 title claims abstract description 40
- 230000006835 compression Effects 0.000 claims abstract description 41
- 238000007906 compression Methods 0.000 claims abstract description 41
- 230000007704 transition Effects 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 238000005192 partition Methods 0.000 claims abstract description 20
- 230000002265 prevention Effects 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 105
- 239000010687 lubricating oil Substances 0.000 claims description 24
- 230000003068 static effect Effects 0.000 claims description 13
- 239000004519 grease Substances 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 8
- 238000005461 lubrication Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000001050 lubricating effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
-
- 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
- F04C18/082—Details specially related to intermeshing engagement type pumps
-
- 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
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
-
- 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
-
- 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
Abstract
The invention relates to an oil leakage prevention claw type hydrogen circulating pump, wherein a cylinder cover and a first bearing seat form a compression cavity, the first bearing seat and a middle partition plate form a transition cavity, the middle partition plate and a second bearing seat form a gear cavity, and the second bearing seat and a motor stator form a motor cavity; the driving shaft sequentially passes through the compression cavity, the transition cavity, the gear cavity and the motor cavity, and the driven shaft sequentially passes through the compression cavity, the transition cavity and the gear cavity; the driving shaft is provided with a driving claw rotor, a first oil seal, a first bearing, a third oil seal, a driving gear, a third bearing, a fifth oil seal and a motor rotor, and the driven shaft is provided with a driven claw rotor, a second oil seal, a second bearing, a fourth oil seal, a driven gear and a fourth bearing; the second bearing seat is provided with an oil injection hole, and the bottom of the first bearing seat is provided with an oil discharge and exhaust hole; an air inlet and an air outlet are arranged on the end face of the cylinder cover. The oil leakage prevention claw type hydrogen circulating pump has reasonable structure and good sealing effect.
Description
Technical Field
The invention relates to the technical field of hydrogen circulating pumps, in particular to an oil leakage prevention claw type hydrogen circulating pump.
Background
The gas discharged from the anode of the fuel cell contains part of unreacted hydrogen, nitrogen and water vapor, and if the gas is directly discharged, the utilization rate of the hydrogen is low, so that not only is the resource wasted, but also a certain safety risk exists. At present, a hydrogen circulating pump or an ejector is mainly adopted to boost the pressure of the hydrogen and then send the hydrogen into a fuel cell for use, the ejector is limited in use at low power, and the hydrogen circulating pump has wide working range and flexible application. However, the roots-type hydrogen circulating pump and the claw-type hydrogen circulating pump adopted at present compress gas through the reverse rotation of two mutually meshed rotors, the rotors drive through synchronous gears and ensure the consistency of rotation angular velocity, and the gears rotating at high speed need lubricating oil for lubrication and take away heat generated by friction. The rotary oil seal is adopted between the compression cavity and the gear cavity to carry out dynamic seal, but the oil seal can be worn in the use process, the sealing performance of the oil seal is reduced after the oil seal is used for a period of time, meanwhile, high-pressure hydrogen in the compression cavity can leak to the gear cavity through the dynamic seal to enable the pressure in the gear cavity to be increased, after a hydrogen circulating pump is stopped, the pressure in the compression cavity is reduced, and if the sealing performance of the oil seal is poor, lubricating oil in the gear cavity can leak back to the compression cavity together with the hydrogen, so that pollution is caused to a galvanic pile.
Disclosure of Invention
To the not enough of above-mentioned prior art, the technical problem that this patent application was to solve is how to provide a rational in infrastructure, sealed effectual leak protection oil claw formula hydrogen circulating pump.
In order to solve the technical problems, the invention adopts the following technical scheme:
an oil leakage prevention claw type hydrogen circulating pump comprises a cylinder cover, a first bearing seat, a middle partition plate, a second bearing seat, a motor stator, a motor rotor, a driving claw type rotor, a driven claw type rotor, a driving shaft, a driven shaft, a driving gear and a driven gear; the cylinder cover and the first bearing seat form a compression cavity, the first bearing seat and the middle partition plate form a transition cavity, the middle partition plate and the second bearing seat form a gear cavity, and the second bearing seat and the motor stator form a motor cavity; the driving shaft sequentially passes through the compression cavity, the transition cavity, the gear cavity and the motor cavity, and the driven shaft sequentially passes through the compression cavity, the transition cavity and the gear cavity; the driving shaft is provided with a driving claw type rotor, a first oil seal, a first bearing, a third oil seal, a driving gear, a third bearing, a fifth oil seal and a motor rotor, and the driven shaft is provided with a driven claw type rotor, a second oil seal, a second bearing, a fourth oil seal, a driven gear and a fourth bearing; the first bearing seat is provided with a first oil seal, a second oil seal, a first bearing and a second bearing, the middle partition plate is provided with a third oil seal and a fourth oil seal, and the second bearing seat is provided with a third bearing, a fourth bearing and a fifth oil seal; the second bearing seat is provided with an oil injection hole, and the bottom of the first bearing seat is provided with an oil discharge vent; the motor rotor is controlled by the controller to rotate at the same speed and output power, the driving shaft and the driven shaft are reversely rotated at the same speed by the meshing of the driving gear and the driven gear, the driving claw rotor and the driven claw rotor of the compression cavity are driven to rotate to compress hydrogen, and the end face of the cylinder cover is provided with an air inlet hole and an air outlet hole.
The right sides of the third bearing and the fourth bearing are respectively provided with a first wave spring and a second wave spring.
The oil drain hole is connected to a pile exhaust pipeline through a pipeline, and a normally closed electromagnetic valve is arranged on the pipeline.
The two PTFE lips of the first oil seal and the second oil seal are reversely arranged, lubricating grease is added between the two lips to lubricate the oil seals, the lip facing the compression cavity is used for sealing hydrogen, the lip facing the transition cavity is used for sealing the hydrogen and lubricating oil of the transition cavity, and lubricating oil is prevented from flowing back to the compression cavity.
The lips of the third oil seal, the fourth oil seal and the fifth oil seal are double-lip PTFE oil seals facing the same direction, the sealing lips face the gear cavity, and lubricating grease is added between the two lips to lubricate the oil seals.
The cylinder cover and the first bearing seat are subjected to static sealing through a first O-shaped ring; static sealing is carried out between the first bearing seat and the middle partition plate through a second O-shaped ring; static sealing is carried out between the middle partition plate and the second bearing through a third O-shaped ring; and static sealing is carried out between the second bearing seat and the motor stator through a fourth O-shaped ring.
The first bearing and the second bearing are grease lubrication deep groove ball bearings or angular contact bearings with sealing covers on two sides.
Wherein the third bearing and the fourth bearing are open ball bearings.
In summary, according to the oil leakage prevention claw type hydrogen circulating pump, aiming at the problem of oil leakage of the hydrogen circulating pump with a common structure, the transition cavity is arranged between the compression cavity and the gear cavity, the double-lip PTFE oil seals are arranged between the compression cavity and the transition cavity and between the transition cavity and the gear cavity, lubricating grease is added between two lips of the oil seal to lubricate the oil seal, the service life of the oil seal can be prolonged, and the phenomenon that lubricating oil in the gear cavity directly leaks into the compression cavity when the oil seal fails can be avoided. And after the hydrogen circulating pump is stopped, the electromagnetic valve is started to remove hydrogen in the transition cavity and lubricating oil possibly leaked from the gear cavity, so that the pressure in the transition cavity is always not higher than that in the compression cavity, the lubricating oil is prevented from leaking into the compression cavity due to pressure difference, and the electromagnetic valve can be closed after the exhaust is completed.
Drawings
Fig. 1 is a schematic structural diagram of an oil leakage prevention claw type hydrogen circulating pump according to the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that the azimuth or positional relationship indicated by the azimuth words such as "upper, lower" and "top, bottom", etc. are generally based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and these azimuth words do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth or be constructed and operated in a specific azimuth, without limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
As shown in fig. 1, an oil leakage preventing claw type hydrogen circulation pump comprises a cylinder cover 1, a first bearing seat 8, an intermediate partition plate 12, a second bearing 19, a motor stator 23, a motor rotor 22, a driving claw type rotor 3, a driven claw type rotor 30, a driving shaft 2, a driven shaft 32, a driving gear 14 and a driven gear 26; the cylinder cover 1 and the first bearing seat 8 form a compression cavity 4, the first bearing seat 8 and the middle partition plate 12 form a transition cavity 9, the middle partition plate 12 and the second bearing seat 19 form a gear cavity 15, and the second bearing seat 19 and the motor stator 23 form a motor cavity 20; the driving shaft 2 sequentially passes through the compression cavity 4, the transition cavity 9, the gear cavity 15 and the motor cavity 20, and the driven shaft 32 sequentially passes through the compression cavity 4, the transition cavity 9 and the gear cavity 15; the driving shaft 2 is provided with a driving claw rotor 3, a first oil seal 5, a first bearing 6, a third oil seal 10, a driving gear 14, a third bearing 16, a fifth oil seal 18 and a motor rotor 22, and the driven shaft 32 is provided with a driven claw rotor 20, a second oil seal 29, a second bearing 28, a fourth oil seal 27, a driven gear 26 and a fourth bearing 25; in order to prevent lubricating oil in a gear cavity from leaking to a compression cavity, a transition cavity is arranged between the compression cavity and the gear cavity, a first oil seal, a second oil seal, a first bearing and a second bearing are arranged on a first bearing seat, a third oil seal and a fourth oil seal are arranged on a middle partition plate, and a third bearing, a fourth bearing and a fifth oil seal are arranged on a second bearing seat; the second bearing seat is provided with an oil filling hole, a certain amount of lubricating oil is added into the gear cavity to lubricate the gear, the third bearing and the fourth bearing, and even if the third oil seal and the fourth oil seal fail, the lubricating oil can leak to the transition cavity first and can not leak to the compression cavity directly, and the bottom of the first bearing seat is provided with an oil discharging hole 31; the motor rotor is controlled by the controller to rotate at the same speed and power output, the driving shaft and the driven shaft are reversely rotated at the same speed by the meshing of the driving gear and the driven gear, the driving claw rotor and the driven claw rotor of the compression cavity are driven to rotate to compress hydrogen, and the end face of the cylinder cover is provided with an air inlet hole 33 and an air outlet hole 34 to realize the processes of air suction, compression and air exhaust of the hydrogen.
In the present embodiment, the right sides of the third bearing and the fourth bearing are provided with the first wave spring 17 and the second wave spring 24, respectively. And a certain axial pretightening force can be applied to the third bearing and the fourth bearing, so that the axial serial movement of the driving claw type rotor and the driven claw type rotor is prevented.
In the embodiment, the oil discharge and exhaust hole is connected to a pile exhaust pipeline through a pipeline, and a normally closed electromagnetic valve is arranged on the pipeline. When the hydrogen circulating pump is stopped, the control system opens the electromagnetic valve to exhaust and discharge oil, so that the pressure of the transition cavity is lower than that of the compression cavity, and lubricating oil can be effectively prevented from leaking into the compression cavity.
In this embodiment, the two PTFE lips of the first oil seal and the second oil seal are arranged in opposite directions, grease is added between the two lips to lubricate the oil seals, the lip facing the compression chamber is used for sealing hydrogen, leakage of hydrogen into the transition chamber is reduced, and the lip facing the transition chamber is used for sealing the hydrogen and the lubricating oil in the transition chamber to flow back into the compression chamber.
In this embodiment, the lips of the third oil seal, the fourth oil seal and the fifth oil seal are all double-lip PTFE oil seals facing the same direction, the seal lips of the double-lip PTFE oil seals face the gear cavity, and grease is added between the two lips to lubricate the oil seals. The third oil seal and the fourth oil seal are mainly used for sealing lubricating oil in the gear cavity and preventing the lubricating oil from leaking into the transition cavity; if the third or fourth oil seal fails, a small amount of lubricating oil leaks into the transition chamber, and at this time, the first oil seal and the second oil seal can play the dual-seal effect, preventing the lubricating oil from directly leaking into the compression chamber. The fifth oil seal is mainly used for sealing lubricating oil in the gear cavity and possibly hydrogen leakage to the motor cavity. The outer ring of the oil seal and the oil seal mounting hole can be coated with sealant or rubber ring to realize static seal
In the embodiment, static sealing is performed between the cylinder cover and the first bearing seat through the first O-shaped ring 7, so that hydrogen leakage is prevented; static sealing is carried out between the first bearing seat and the middle partition plate through a second O-shaped ring 11, so that leakage of hydrogen and lubricating oil into the surrounding environment is prevented; static sealing is carried out between the middle partition plate and the second bearing through a third O-shaped ring 13, so that lubricating oil is prevented from leaking out of the gear cavity; static seal is carried out between the second bearing seat and the motor stator through a fourth O-shaped ring 21, and meanwhile, the motor stator coil is filled with sealant to prevent hydrogen from leaking through the motor.
In this embodiment, the first bearing and the second bearing are grease-lubricated deep groove ball bearings or angular contact bearings with sealing covers on both sides. The sealing cover can prevent the leakage of lubricating grease and realize the long-term lubrication of the bearing.
In this embodiment, the third bearing and the fourth bearing are open ball bearings. Lubrication is performed by the lubrication oil of the gear cavity.
Principle of:
for the claw-type hydrogen circulating pump, the claw-type rotor is of a cantilever structure, and only one end of the compression cavity is required to be dynamically sealed, so that the number of the dynamically sealed devices and the lubricating oil leakage probability can be reduced. The gear cavity is generally arranged at the middle position, and in order to ensure the span ratio between the rotor cantilever and the two support bearings, the distance between the two bearings is often larger, so that a middle partition plate can be arranged between the two bearings to form a transition cavity and a gear cavity, the transition cavity is used for buffering the pressure change of the compression cavity and the gear cavity, temporarily storing lubricating oil which is possibly leaked, exhausting and discharging oil through an exhaust oil hole and an electromagnetic valve at the bottom of the transition cavity, enabling the pressure of the compression cavity to be always larger than that of the transition cavity, and reducing the leakage of the lubricating oil to the compression cavity caused by pressure difference.
Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The oil leakage prevention claw type hydrogen circulating pump is characterized by comprising a cylinder cover (1), a first bearing seat (8), an intermediate baffle plate (12), a second bearing seat (19), a motor stator (23), a motor rotor (22), a driving claw type rotor (3), a driven claw type rotor (30), a driving shaft (2), a driven shaft (32), a driving gear (14) and a driven gear (26);
the cylinder cover (1) and the first bearing seat (8) form a compression cavity (4), the first bearing seat (8) and the middle partition plate (12) form a transition cavity (9), the middle partition plate (12) and the second bearing seat (19) form a gear cavity (15), and the second bearing seat (19) and the motor stator (23) form a motor cavity (20); the driving shaft (2) sequentially penetrates through the compression cavity (4), the transition cavity (9), the gear cavity (15) and the motor cavity (20), and the driven shaft (32) sequentially penetrates through the compression cavity (4), the transition cavity (9) and the gear cavity (15); the driving shaft (2) is provided with a driving claw rotor (3), a first oil seal (5), a first bearing (6), a third oil seal (10), a driving gear (14), a third bearing (16), a fifth oil seal (18) and a motor rotor (22), and the driven shaft (32) is provided with a driven claw rotor (20), a second oil seal (29), a second bearing (28), a fourth oil seal (27), a driven gear (26) and a fourth bearing (25); the first bearing seat (8) is provided with a first oil seal (5), a second oil seal (29), a first bearing (6) and a second bearing (28), the middle partition plate (12) is provided with a third oil seal (10) and a fourth oil seal (27), and the second bearing seat (19) is provided with a third bearing (16), a fourth bearing (25) and a fifth oil seal (18); an oil filling hole is formed in the second bearing seat (19), and an oil discharge vent hole (31) is formed in the bottom of the first bearing seat (8);
the motor rotor (22) is controlled by a controller to rotate at the same speed and output power, the driving shaft and the driven shaft are reversely rotated at the same speed through the meshing of the driving gear (14) and the driven gear (26), the driving claw rotor (3) and the driven claw rotor (30) of the compression cavity are driven to rotate to compress hydrogen, and the end face of the cylinder cover (1) is provided with an air inlet hole (33) and an air outlet hole (34).
2. The oil leakage prevention claw type hydrogen circulation pump according to claim 1, wherein the right sides of the third bearing (16) and the fourth bearing (25) are respectively provided with a first wave spring (17) and a second wave spring (24).
3. The oil leakage prevention claw type hydrogen circulation pump according to claim 1, wherein the oil discharge hole (31) is connected to a stack exhaust pipe through a pipe, and a normally closed electromagnetic valve is installed on the pipe.
4. The oil leakage prevention claw type hydrogen circulating pump according to claim 1, wherein the two PTFE lips of the first oil seal (5) and the second oil seal (29) are arranged reversely, grease is added between the two lips to lubricate the oil seals, the lip facing the compression chamber is used for sealing hydrogen, the lip facing the transition chamber is used for sealing hydrogen and lubricating oil of the transition chamber, and the lubricating oil is prevented from flowing back to the compression chamber.
5. The oil leakage prevention claw type hydrogen circulating pump according to claim 1, wherein lips of the third oil seal (10), the fourth oil seal (27) and the fifth oil seal (18) are double-lip PTFE oil seals facing the same direction, sealing lips of the double-lip PTFE oil seals face the gear cavity, and grease is added between the two lips to lubricate the oil seals.
6. The oil leakage prevention claw type hydrogen circulating pump according to claim 1 is characterized in that static sealing is carried out between the cylinder cover (1) and the first bearing seat (8) through a first O-shaped ring (7); static sealing is carried out between the first bearing seat (8) and the middle partition plate (12) through a second O-shaped ring (11); static sealing is carried out between the middle partition plate (12) and the second bearing (19) through a third O-shaped ring (13); a static seal is formed between the second bearing seat (19) and the motor stator (23) through a fourth O-shaped ring (21).
7. The oil leakage prevention claw type hydrogen circulation pump according to claim 1, wherein the first bearing (6) and the second bearing (28) are grease lubrication deep groove ball bearings or angular contact bearings with sealing covers on both sides.
8. The oil leakage prevention claw hydrogen circulation pump according to claim 1, wherein the third bearing (16) and the fourth bearing (25) are open ball bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210725626.3A CN115030896B (en) | 2022-06-24 | 2022-06-24 | Leak protection oil claw formula hydrogen circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210725626.3A CN115030896B (en) | 2022-06-24 | 2022-06-24 | Leak protection oil claw formula hydrogen circulating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115030896A CN115030896A (en) | 2022-09-09 |
| CN115030896B true CN115030896B (en) | 2024-02-27 |
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ID=83126397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210725626.3A Active CN115030896B (en) | 2022-06-24 | 2022-06-24 | Leak protection oil claw formula hydrogen circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115030896B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0544852A (en) * | 1991-08-09 | 1993-02-23 | Hitachi Ltd | Oil seal for vacuum pump |
| JP2006177299A (en) * | 2004-12-24 | 2006-07-06 | Toyota Industries Corp | Electric pump |
| CN203517250U (en) * | 2013-09-29 | 2014-04-02 | 廖云霞 | Anti-oil-leakage lubricating mechanism applied to bearing |
| CN110319004A (en) * | 2019-07-15 | 2019-10-11 | 烟台菱辰能源有限公司 | A kind of claw hydrogen gas circulating pump |
-
2022
- 2022-06-24 CN CN202210725626.3A patent/CN115030896B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0544852A (en) * | 1991-08-09 | 1993-02-23 | Hitachi Ltd | Oil seal for vacuum pump |
| JP2006177299A (en) * | 2004-12-24 | 2006-07-06 | Toyota Industries Corp | Electric pump |
| CN203517250U (en) * | 2013-09-29 | 2014-04-02 | 廖云霞 | Anti-oil-leakage lubricating mechanism applied to bearing |
| CN110319004A (en) * | 2019-07-15 | 2019-10-11 | 烟台菱辰能源有限公司 | A kind of claw hydrogen gas circulating pump |
Non-Patent Citations (1)
| Title |
|---|
| 锥齿轮轴承套密封及结构改进;杨文英;;宁夏机械;20110315(01);全文 * |
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| Publication number | Publication date |
|---|---|
| CN115030896A (en) | 2022-09-09 |
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