CN114135486B - Planar magnetic force driving hydrogen circulating pump - Google Patents
Planar magnetic force driving hydrogen circulating pump Download PDFInfo
- Publication number
- CN114135486B CN114135486B CN202210019507.6A CN202210019507A CN114135486B CN 114135486 B CN114135486 B CN 114135486B CN 202210019507 A CN202210019507 A CN 202210019507A CN 114135486 B CN114135486 B CN 114135486B
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- rotor
- transmission gear
- transmission
- pump
- magnet
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 34
- 239000001257 hydrogen Substances 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 60
- 238000007789 sealing Methods 0.000 claims description 10
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances 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
- 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
- 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
- F04C23/008—Hermetic 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
- 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
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
-
- 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
- F04C29/0064—Magnetic couplings
-
- 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)
- Rotary Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a planar magnetic force driving hydrogen circulating pump, which comprises a pump shell, and a rotor A and a rotor B which are arranged in the pump shell, wherein the rotor A and the rotor B are mutually matched, a feed inlet and a discharge outlet are arranged on the pump shell at the meshing position of the rotor A and the rotor B, a transmission hole is arranged at the axial position of the rotor A and the rotor B, a rotor shaft is matched in the transmission hole, the rotor shaft is in transmission connection with the rotor A or the rotor B through a spline, one end of the rotor shaft is in rotational connection with the inner wall of the pump shell through a bearing, and the rotation of a transmission gear A and the transmission gear B is respectively transmitted to the rotor A and the rotor B at the other side from one side of a separation wall of a connecting shell by utilizing magnetic force transmission.
Description
Technical Field
The present invention relates to a hydrogen circulation system for a fuel cell vehicle, and more particularly, to a hydrogen circulation pump for a hydrogen circulation system.
Background
The hydrogen circulating pump is a core device of a fuel cell automobile hydrogen circulating system, and has the main functions of recycling unreacted hydrogen in a galvanic pile, purging product water and preventing flooding, so that the hydrogen utilization efficiency and the system safety are improved, and the hydrogen circulating pump has an important influence on the service life and the performance of a hydrogen fuel cell. Because the hydrogen conveyed by the hydrogen circulating pump has the characteristic of small molecules, the leakage is very easy, and the sealing design difficulty of the hydrogen circulating pump is high. The hydrogen is inflammable gas, and the leakage of the hydrogen can bring great potential safety hazard, so the design of the leakage-free hydrogen circulating pump has important significance, can further promote the application and popularization of the hydrogen fuel cell, and meets the development requirements of national carbon peak and carbon neutralization.
In a conventional hydrogen circulating pump, a motor drives a transmission shaft to rotate, the transmission shaft penetrates through a pump cover and is connected with a rotor through a spline or a flat key, dynamic seal is arranged between the transmission shaft and the pump cover, and after the conventional hydrogen circulating pump is used for a period of time, a sealing ring is worn to a certain extent, so that leakage occurs.
Disclosure of Invention
The invention aims to provide a planar magnetic force driven hydrogen circulating pump so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a plane magnetic force drive hydrogen circulating pump, includes pump case and rotor A and rotor B of setting in its inside, rotor A and rotor B mutually support, be equipped with feed inlet and discharge gate on rotor A and rotor B engaged position's the pump case, rotor A and rotor B's axis position is equipped with a transmission hole, and the cooperation is equipped with a rotor shaft in this transmission hole, be connected through spline transmission between rotor shaft and rotor A or the rotor B, rotor shaft one end is connected through the bearing rotation with the pump case inner wall, the rotor shaft other end is connected through the bearing rotation with connecting housing inner wall, a motor is installed to connecting housing left end, connecting housing and pump body inside are equipped with and are used for driving two rotor pivoted rotary driving parts, rotary driving part's input is connected with the output of motor.
As a further scheme of the invention: the rotary driving piece comprises a plurality of first magnets arranged inside a rotor A and a rotor B, wherein the first magnets are distributed by taking a rotor shaft as a central array, two short shafts are rotatably arranged inside a connecting shell, a transmission gear A and a transmission gear B are connected outside the short shafts through flat key transmission, a third clamp spring for preventing the flat key from falling off is arranged on the short shafts, the transmission gear A and the transmission gear B are meshed with each other, one short shaft is fixedly connected with the output end of a motor, a plurality of second magnets are distributed on the transmission gear A and the transmission gear B in an array mode, and the number of the second magnets on each transmission gear corresponds to the number of the first magnets on the corresponding rotor.
As a further scheme of the invention: three blades are arranged on each rotor, a step hole is formed in each blade, the first magnet is inlaid in the large hole, interference fit is adopted, and a first clamp spring is arranged on the outlet side of the large hole to prevent the first magnet from falling off; the aperture runs through for alleviate the weight of rotor and conveniently dismantle first magnet.
As a further scheme of the invention: three step holes are distributed on each transmission gear and are consistent with the step holes of the rotor; the second magnet is inlaid in the big hole and is in interference fit; a second clamp spring is arranged at the outlet side of the big hole to prevent the second magnet from falling off; the small holes of the step holes penetrate through the step holes and are used for reducing the weight of the transmission gear and facilitating the disassembly of the second magnet.
As a further scheme of the invention: the connecting shell is made of high-strength engineering plastic.
As a further scheme of the invention: the connecting shell is detachably connected with the pump shell and the end part of the motor through a connecting piece.
As a further scheme of the invention: and a sealing ring is arranged between the end part of the connecting shell and the pump shell.
Compared with the prior art, the invention has the beneficial effects that: the magnetic sealing device utilizes magnetic transmission, and the rotation of the transmission gear A and the transmission gear B is respectively transmitted to the rotor A and the rotor B on the other side from one side of the isolation wall of the connecting shell, so that the static sealing structure design is realized, the problem of conventional dynamic sealing leakage is solved, and the magnetic sealing device has higher reliability and safety.
Drawings
FIG. 1 is a schematic diagram of a normal cross-section of a planar magnetically driven hydrogen circulation pump of the present invention;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is a sectional view taken in the direction B-B in FIG. 1;
FIG. 4 is an enlarged view of a portion of region C of FIG. 2;
fig. 5 is a diagram of a transmission gear of the planar magnetic force driven hydrogen circulation pump of the present invention.
Wherein: 1-pump shell, 2-rotor A, 3-rotor B, 4-connection shell, 5-transmission gear A, 6-transmission gear B, 7-motor, 8-rotor shaft, 9-short shaft, 10-bearing, 11-screw, 12-sealing ring, 201-first magnet, 202-first jump ring, 501-second magnet, 502-second jump ring, 701-flat key, 702-third jump ring.
Detailed Description
Example 1
Referring to fig. 1-5, in the embodiment of the present invention, a planar magnetic force driven hydrogen circulation pump includes a pump housing 1, and a rotor A2 and a rotor B3 disposed inside the pump housing, wherein the rotor A2 and the rotor B3 are mutually matched, a feed port and a discharge port are disposed on the pump housing 1 at meshing positions of the rotor A2 and the rotor B3, a transmission hole is disposed at axial positions of the rotor A2 and the rotor B3, a rotor shaft 8 is cooperatively disposed in the transmission hole, the rotor shaft 8 is in transmission connection with the rotor A2 or the rotor B3 through a spline, one end of the rotor shaft 8 is rotatably connected with an inner wall of the pump housing 1 through a bearing 10, the other end of the rotor shaft 8 is rotatably connected with an inner wall of a connection housing 4 through the bearing 10, a motor 7 is mounted at a left end of the connection housing 4, a seal ring 12 is disposed between an end of the connection housing 4 and the pump housing 1, a rotary driving member for driving the two rotors is disposed inside the connection housing 4 and the pump housing 1, and an input end of the rotary driving member is connected with an output end of the motor 7;
the rotary driving piece comprises a plurality of first magnets 201 arranged in a rotor A2 and a rotor B3, the first magnets 201 are distributed in an array by taking a rotor shaft as a center, two short shafts 9 are rotatably arranged in a connecting shell 4, the outer sides of the two short shafts 9 are connected with a transmission gear A5 and a transmission gear B6 through flat keys 701 in a transmission manner, third clamp springs 702 for preventing the flat keys 701 from falling off are arranged on the short shafts 9, the transmission gear A5 and the transmission gear B6 are meshed with each other, one short shaft 9 is fixedly connected with the output end of a motor 7, a plurality of second magnets 501 are distributed on the transmission gear A5 and the transmission gear B6 in an array manner, the number of the second magnets 501 on each transmission gear corresponds to that of the first magnets 201 on the corresponding rotor, and when the transmission gears rotate, the rotors also rotate under the transmission of magnetic force, and the rotor is in a non-contact transmission manner, so that the defects of the traditional dynamic sealing are overcome;
three blades are arranged on each rotor, a step hole is formed in each blade, the first magnet 201 is embedded in the large hole, interference fit is adopted, and a first clamping spring 202 is arranged on the outlet side of the large hole to prevent the first magnet 201 from falling off; the small holes penetrate through, so that the weight of the rotor is reduced, and the first magnet 201 is convenient to detach;
three step holes are distributed on each transmission gear and are consistent with the step holes of the rotor; the second magnet 501 is embedded in the big hole and is in interference fit; a second clamping spring 502 is arranged at the outlet side of the large hole, so that the second magnet 501 is prevented from falling off; the small holes of the step holes penetrate through the step holes and are used for reducing the weight of the transmission gear and facilitating the disassembly of the second magnet 501; the transmission gear is additionally provided with a plurality of through holes for reducing weight;
the connecting shell 4 is made of high-strength engineering plastics, has a good magnetic force transmission effect, small eddy current loss and light weight, and can be made of metal materials such as titanium alloy, hastelloy, 316L and the like;
the connection housing 4 is detachably connected with the pump housing 1 and the end of the motor 7 by means of connectors.
The working principle of the invention is as follows: the output shaft of the motor 7 drives the transmission gear A5 to rotate through the flat key 701, and the rotational energy is transmitted to the rotor A2 connected to the other side of the housing 4 by using the magnetic force between the second magnet 501 and the first magnet 201. On the other hand, the transmission gear A5 drives the transmission gear B6 to rotate through tooth-shaped engagement, and the gear B6 drives the rotor B3 to operate through magnetic transmission. The rotor A2 and the rotor B3 run reversely to realize the transportation and the pressure raising of the hydrogen. The invention realizes transmission by utilizing magnetic force, all places related to hydrogen leakage are static seals, and the seal can be further enhanced by means of sealant on the basis of the seal ring, so that zero hydrogen leakage is realized.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
Claims (5)
1. The plane magnetic force driving hydrogen circulating pump comprises a pump shell (1), and a rotor A (2) and a rotor B (3) which are arranged in the pump shell, wherein the rotor A (2) and the rotor B (3) are mutually matched, and a feed inlet and a discharge outlet are arranged on the pump shell (1) at the meshing position of the rotor A (2) and the rotor B (3);
the motor is characterized in that a transmission hole is formed in the axial positions of the rotor A (2) and the rotor B (3), a rotor shaft (8) is matched in the transmission hole, the rotor shaft (8) is in transmission connection with the rotor A (2) or the rotor B (3) through a spline, one end of the rotor shaft (8) is in rotary connection with the inner wall of the pump shell (1) through a bearing (10), the other end of the rotor shaft (8) is in rotary connection with the inner wall of the connecting shell (4) through the bearing (10), a motor (7) is arranged at the left end of the connecting shell (4), a rotary driving piece for driving the two rotors to rotate is arranged in the connecting shell (4) and the pump body (1), and the input end of the rotary driving piece is connected with the output end of the motor (7);
the rotary driving piece comprises a plurality of first magnets (201) arranged in a rotor A (2) and a rotor B (3), wherein the first magnets (201) are distributed in an array by taking a rotor shaft as a center, two short shafts (9) are rotatably arranged in a connecting shell (4), a transmission gear A (5) and a transmission gear B (6) are connected to the outer sides of the two short shafts (9) through flat keys (701) in a transmission mode, third clamp springs (702) for preventing the flat keys (701) from falling off are arranged on the short shafts (9), the transmission gear A (5) and the transmission gear B (6) are meshed with each other, one short shaft (9) is fixedly connected with the output end of a motor (7), a plurality of second magnets (501) are distributed in an array on the transmission gear A (5) and the transmission gear B (6), and the number of the second magnets (501) on each transmission gear corresponds to the number of the first magnets (201) on the corresponding rotor;
three blades are arranged on each rotor, a step hole is formed in each blade, a first magnet (201) is inlaid in the large hole, interference fit is adopted, and a first clamp spring (202) is arranged on the outlet side of the large hole to prevent the first magnet (201) from falling off; the small holes penetrate through the rotor to reduce the weight of the rotor and facilitate the disassembly of the first magnet (201).
2. The planar magnetically driven hydrogen circulation pump of claim 1, wherein each drive gear is provided with three stepped holes which are consistent with the stepped holes of the rotor; the second magnet (501) is embedded in the big hole and is in interference fit; a second clamping spring (502) is arranged at the outlet side of the big hole to prevent the second magnet (501) from falling off; the small holes of the step holes penetrate through the step holes and are used for reducing the weight of the transmission gear and facilitating the disassembly of the second magnet (501).
3. The planar magnetically driven hydrogen circulation pump according to claim 1, characterized in that the connection housing (4) is made of high strength engineering plastic.
4. The planar magnetically driven hydrogen circulation pump according to claim 1, characterized in that the connection housing (4) is detachably connected to the pump housing (1) and to the end of the motor (7) by means of a connection piece.
5. The planar magnetically driven hydrogen circulation pump according to claim 1, characterized in that a sealing ring (12) is arranged between the end of the connection housing (4) and the pump housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210019507.6A CN114135486B (en) | 2022-01-10 | 2022-01-10 | Planar magnetic force driving hydrogen circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210019507.6A CN114135486B (en) | 2022-01-10 | 2022-01-10 | Planar magnetic force driving hydrogen circulating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114135486A CN114135486A (en) | 2022-03-04 |
| CN114135486B true CN114135486B (en) | 2024-04-02 |
Family
ID=80381682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210019507.6A Active CN114135486B (en) | 2022-01-10 | 2022-01-10 | Planar magnetic force driving hydrogen circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114135486B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004174A (en) * | 2006-01-20 | 2007-07-25 | 株式会社丰田自动织机 | Electric pump for hydrogen circulation |
| CN202326247U (en) * | 2011-11-11 | 2012-07-11 | 中国科学院沈阳科学仪器研制中心有限公司 | Magnetic drive screw vacuum pump |
| DE102011005831A1 (en) * | 2011-03-21 | 2012-09-27 | Robert Bosch Gmbh | Rotary piston blower for use as four-phase electric motor for charging fuel cell system of electric car, has pistons mounted in housing, where pistons are meshed with each other and provided with magnet, and housing is provided with winding |
| CN103256230A (en) * | 2013-04-26 | 2013-08-21 | 胡道明 | Motor magnetic pump |
| CN106026576A (en) * | 2016-06-29 | 2016-10-12 | 清华大学 | Asynchronous starting permanent-magnet synchronous motor with smooth self-starting function |
| CN109441806A (en) * | 2018-11-30 | 2019-03-08 | 江阴爱尔姆真空设备有限公司 | A kind of magnetic drives formula air cooling Roots vacuum system |
| CN113757140A (en) * | 2021-10-27 | 2021-12-07 | 山东凯格瑞森能源科技有限公司 | Totally enclosed leak-free magnetic force driving hydrogen circulating pump |
-
2022
- 2022-01-10 CN CN202210019507.6A patent/CN114135486B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101004174A (en) * | 2006-01-20 | 2007-07-25 | 株式会社丰田自动织机 | Electric pump for hydrogen circulation |
| DE102011005831A1 (en) * | 2011-03-21 | 2012-09-27 | Robert Bosch Gmbh | Rotary piston blower for use as four-phase electric motor for charging fuel cell system of electric car, has pistons mounted in housing, where pistons are meshed with each other and provided with magnet, and housing is provided with winding |
| CN202326247U (en) * | 2011-11-11 | 2012-07-11 | 中国科学院沈阳科学仪器研制中心有限公司 | Magnetic drive screw vacuum pump |
| CN103256230A (en) * | 2013-04-26 | 2013-08-21 | 胡道明 | Motor magnetic pump |
| CN106026576A (en) * | 2016-06-29 | 2016-10-12 | 清华大学 | Asynchronous starting permanent-magnet synchronous motor with smooth self-starting function |
| CN109441806A (en) * | 2018-11-30 | 2019-03-08 | 江阴爱尔姆真空设备有限公司 | A kind of magnetic drives formula air cooling Roots vacuum system |
| CN113757140A (en) * | 2021-10-27 | 2021-12-07 | 山东凯格瑞森能源科技有限公司 | Totally enclosed leak-free magnetic force driving hydrogen circulating pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114135486A (en) | 2022-03-04 |
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