CN114135486A - Plane magnetic force drive hydrogen circulating pump - Google Patents
Plane magnetic force drive hydrogen circulating pump Download PDFInfo
- Publication number
- CN114135486A CN114135486A CN202210019507.6A CN202210019507A CN114135486A CN 114135486 A CN114135486 A CN 114135486A CN 202210019507 A CN202210019507 A CN 202210019507A CN 114135486 A CN114135486 A CN 114135486A
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- Prior art keywords
- rotor
- transmission
- transmission gear
- pump
- magnet
- 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.)
- Granted
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000001257 hydrogen Substances 0.000 title claims abstract description 34
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 60
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 238000005192 partition 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
- 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
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 driven 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 matched with each other, 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 and arranged 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, the invention utilizes magnetic force transmission to respectively transmit the rotation of a transmission gear A and the rotation of the transmission gear B from one side of a partition wall of the connecting shell to the rotor A and the rotor B at the other side, realizes the design of a static sealing structure, avoids the problem of conventional sealing leakage, and has higher reliability and safety.
Description
Technical Field
The invention relates to a hydrogen circulation system of a fuel cell automobile, in particular to a hydrogen circulation pump for the hydrogen circulation system.
Background
The hydrogen circulating pump is the core equipment of the hydrogen circulating system of the fuel cell automobile, and has the main functions of recycling unreacted hydrogen in the electric pile, purging product water, preventing flooding, improving the hydrogen utilization efficiency and the system safety, and having important influence on the service life and the performance of the hydrogen fuel cell. Because the hydrogen that the hydrogen circulating pump carried has the characteristics that the molecule is little, very easily reveal, lead to the sealed design degree of difficulty of hydrogen circulating pump great. Hydrogen is inflammable gas, and hydrogen reveals and can bring very big potential safety hazard, therefore designs a hydrogen circulating pump that does not leak and has important meaning, can further promote hydrogen fuel cell's application and popularization, accords with the development demand that national carbon reaches the peak, carbon neutralizes.
Conventional hydrogen circulating pump, motor drive transmission shaft rotate, and the transmission shaft passes the pump cover, passes spline or flat key with the rotor and is connected, for the movive seal between transmission shaft and the pump cover, after using a period, certain wearing and tearing will take place for the sealing washer to lead to revealing the phenomenon and take place.
Disclosure of Invention
The present invention is directed to a planar magnetic driving hydrogen circulation pump, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a plane magnetic drive hydrogen circulating pump, includes pump case and sets up rotor A and rotor B inside it, rotor A and rotor B mutually support, be equipped with feed inlet and discharge gate on the pump case of rotor A and rotor B meshing position, 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 passes through the bearing with the pump case inner wall and rotates and be connected, the rotor shaft other end passes through the bearing and is connected the rotation of shells inner wall and be connected, connect the casing left end and install a motor, it is used for driving two rotor pivoted rotary driving spare to connect casing and pump body inside to be equipped with, rotary driving spare's input is connected with the output of motor.
As a further scheme of the invention: the rotary driving part comprises a plurality of first magnets arranged inside a rotor A and a rotor B, the first magnets are distributed in an array mode by taking a rotor shaft as a center, two short shafts are arranged inside the connecting shell in a rotating mode, the outer sides of the two short shafts are connected with a transmission gear A and a transmission gear B through flat key transmission, a third clamp spring for preventing the flat keys from falling off is arranged on the short shafts, the transmission gear A is meshed with the transmission gear B, one of the short shafts is fixedly connected with the output end of the 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: each rotor is provided with three blades, each blade is provided with a step hole, the first magnet is embedded in the large hole and is in interference fit, and the outlet side of the large hole is provided with a first clamp spring to prevent the first magnet from falling off; the small hole penetrates through the rotor for reducing the weight of the rotor and facilitating the detachment of the 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 in position; the second magnet is embedded in the large hole and is in interference fit; a second clamp spring is arranged on the outlet side of the large hole to prevent the second magnet from falling off; the small hole of the step hole penetrates through the step hole and is used for reducing the weight of the transmission gear and facilitating the detachment of the second magnet.
As a further scheme of the invention: the connecting shell is made of high-strength engineering plastics.
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 connecting pieces.
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: this application utilizes magnetic drive, transmits drive gear A, drive gear B's rotation for rotor A, the rotor B of opposite side respectively from the division wall one side of connecting the casing, has realized the design of static seal structure, has stopped conventional dynamic seal and has revealed the problem, has higher reliability and security.
Drawings
FIG. 1 is a normal sectional view of the planar magnetically driven hydrogen circulation pump of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is an enlarged view of a portion of the area C in FIG. 2;
fig. 5 is a diagram of a transmission gear of the planar magnetic driving hydrogen circulation pump of the invention.
Wherein: 1-pump shell, 2-rotor A, 3-rotor B, 4-connecting 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 snap spring, 501-second magnet, 502-second snap spring, 701-flat key and 702-third snap spring.
Detailed Description
Example 1
Referring to fig. 1-5, in an 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 1, where the rotor a2 and the rotor B3 are matched with each other, a feed inlet and a discharge outlet are disposed on the pump housing 1 at a position where the rotor a2 and the rotor B3 are engaged with each other, a transmission hole is disposed at an axial position of the rotor a2 and the rotor B3, a rotor shaft 8 is disposed in the transmission hole in a matching manner, the rotor shaft 8 is connected with the rotor a2 or the rotor B3 through a spline transmission, 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 connecting housing 4 through a bearing 10, a motor 7 is mounted at a left end of the connecting housing 4, a seal ring 12 is disposed between an end of the connecting housing 4 and the pump housing 1, a rotary driving member for driving the two rotors to rotate is disposed inside the connecting housing 4 and the pump body 1, the input end of the rotary driving piece is connected with the output end of the motor 7;
the rotary driving part comprises a plurality of first magnets 201 arranged inside a rotor A2 and a rotor B3, the first magnets 201 are distributed in an array mode by taking a rotor shaft as a center, two short shafts 9 are rotatably arranged inside the connecting shell 4, the outer sides of the two short shafts 9 are connected with a transmission gear A5 and a transmission gear B6 in a transmission mode through flat keys 701, a third clamp spring 702 for preventing the flat keys 701 from falling off is arranged on the short shafts 9, the transmission gear A5 is meshed with the transmission gear B6, one of the short shafts 9 is fixedly connected with the output end of the motor 7, a plurality of second magnets 501 are distributed on the transmission gear A5 and the transmission gear B6 in an array mode, the number of the second magnets 501 on each transmission gear corresponds to the number of the first magnets 201 on the corresponding rotor, the transmission gears and the magnets on the rotors form a magnet transmission part, when the transmission gears rotate, under the transmission of magnetic force, the rotor can also rotate, and non-contact transmission is adopted, so that the defects of the traditional dynamic seal are eliminated;
each rotor is provided with three blades, each blade is provided with a step hole, the first magnet 201 is embedded in the large hole and is in interference fit, and the outlet side of the large hole is provided with the first clamp spring 202 to prevent the first magnet 201 from falling off; the small hole penetrates through the rotor for reducing the weight of the rotor and facilitating the detachment of the first magnet 201;
three step holes are distributed on each transmission gear and are consistent with the step holes of the rotor in position; the second magnet 501 is embedded in the large hole and is in interference fit; a second clamp spring 502 is arranged on the outlet side of the large hole to prevent the second magnet 501 from falling off; a small hole of the stepped hole penetrates through the stepped hole and is used for reducing the weight of the transmission gear and facilitating the detachment of the second magnet 501; a plurality of through holes are additionally distributed on the transmission gear and used for reducing the 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 also be made of metal materials such as titanium alloy, hastelloy and 316L;
the connecting shell 4 is detachably connected with the pump shell 1 and the end part of the motor 7 through connecting pieces.
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 magnetic force between the second magnet 501 and the first magnet 201 is utilized to transmit the rotation energy to the rotor a2 on the other side of the connecting shell 4. On the other hand, the transmission gear A5 drives the transmission gear B6 to rotate through tooth-shaped meshing, and the gear B6 drives the rotor B3 to rotate through magnetic transmission. The rotor A2 and the rotor B3 run in opposite directions to realize the transportation and pressure increase of 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 using the sealant on the basis of the seal ring, thereby realizing zero leakage of hydrogen.
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 attributes thereof.
Claims (7)
1. A planar magnetic force driven 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 matched with each other, and a feed inlet and a discharge outlet are formed in the pump shell (1) at the meshing position of the rotor A (2) and the rotor B (3);
the rotor is characterized in that the axis positions of the rotor A (2) and the rotor B (3) are provided with a transmission hole, a rotor shaft (8) is arranged in the transmission hole in a matched mode, the rotor shaft (8) is in transmission connection with the rotor A (2) or the rotor B (3) through splines, one end of the rotor shaft (8) is in rotation connection with the inner wall of the pump shell (1) through a bearing (10), the other end of the rotor shaft (8) is in rotation connection with the inner wall of the connecting shell (4) through the bearing (10), a motor (7) is installed at the left end of the connecting shell (4), a rotary driving piece used for driving the two rotors to rotate is arranged inside 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).
2. The planar magnetic driving hydrogen circulating pump according to claim 1, wherein the rotary driving member comprises a plurality of first magnets (201) arranged inside the rotor A (2) and the rotor B (3), the first magnets (201) are distributed in an array by taking the rotor shaft as the center, two short shafts (9) are rotatably arranged inside the 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) in a transmission way through a flat key (701), a third snap spring (702) for preventing the flat key (701) from falling off is arranged on the short shaft (9), the transmission gear A (5) and the transmission gear B (6) are meshed with each other, one of the short shafts (9) is fixedly connected with the output end of the motor (7), and a plurality of second magnets (501) are distributed on the transmission gear A (5) and the transmission gear B (6) in an array way, the number of second magnets (501) on each transmission gear corresponds to the number of first magnets (201) on the corresponding rotor.
3. The planar magnetic driving hydrogen circulating pump according to claim 2, wherein each rotor is provided with three blades, each blade is provided with a stepped hole, the first magnet (201) is embedded in the large hole and is in interference fit, and the outlet side of the large hole is provided with the first snap spring (202) to prevent the first magnet (201) from falling off; the small hole penetrates through the rotor for reducing the weight of the rotor and facilitating the detachment of the first magnet (201).
4. The planar magnetically-driven hydrogen circulation pump of claim 3, wherein each of the transmission gears has three stepped holes at positions corresponding to the stepped holes of the rotor; the second magnet (501) is embedded in the large hole and is in interference fit; a second clamp spring (502) is arranged on the outlet side of the large hole to prevent the second magnet (501) from falling off; the small hole of the stepped hole penetrates through the stepped hole and is used for reducing the weight of the transmission gear and facilitating the detachment of the second magnet (501).
5. The planar magnetically-driven hydrogen circulation pump according to claim 1, wherein the connection housing (4) is made of high-strength engineering plastic.
6. The planar magnetic driving hydrogen circulating pump according to claim 1, wherein the connecting shell (4) is detachably connected with the pump shell (1) and the end of the motor (7) through connecting pieces.
7. The planar magnetically-driven hydrogen circulation pump according to claim 1, wherein a sealing ring (12) is provided 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 true CN114135486A (en) | 2022-03-04 |
| CN114135486B 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 |
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| Publication number | Publication date |
|---|---|
| CN114135486B (en) | 2024-04-02 |
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