CN112398281A - Miniature long-life motor and electric centrifugal pump - Google Patents
Miniature long-life motor and electric centrifugal pump Download PDFInfo
- Publication number
- CN112398281A CN112398281A CN202011196879.3A CN202011196879A CN112398281A CN 112398281 A CN112398281 A CN 112398281A CN 202011196879 A CN202011196879 A CN 202011196879A CN 112398281 A CN112398281 A CN 112398281A
- Authority
- CN
- China
- Prior art keywords
- motor
- centrifugal pump
- impeller
- electric centrifugal
- working fluid
- 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
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 4
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- 239000007864 aqueous solution Substances 0.000 claims abstract description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 1
- 239000012224 working solution Substances 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical group C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/061—Lubrication especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
- F04D29/2227—Construction and assembly for special materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4266—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps made of sheet metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- 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
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- 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
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Abstract
The invention may relate to the technical field of motors, centrifugal pumps and the like, in particular to a miniature long-life wet motor and an electric centrifugal pump. Working fluid is filled in the motor, and the working fluid is ethylene glycol aqueous solution; the motor shaft support bearing is a water-lubricated ceramic ball bearing, and the rolling body material of the bearing is Si3N4A material. The motor of the centrifugal pump is the motor. The centrifugal pump impeller cavity is communicated with the motor inner cavity, and the impeller is soaked in the working solution. Provides a miniature motor and an electric centrifugal pump with small volume, light weight and long service life.
Description
Technical Field
The invention may relate to the technical field of motors, centrifugal pumps and the like, in particular to a miniature long-life wet motor and an electric centrifugal pump.
Background
The existing electric centrifugal pump generally comprises a centrifugal pump body and a motor, wherein the pump body and the motor are matched for use, and the motor drives a centrifugal pump rotor to operate. The structure of the existing miniature centrifugal pump comprises a centrifugal pump body, a transmission part and a motor. The transmission part adopts an external connection mode, needs to be installed in a reserved space, and causes the overall volume of the product to be overlarge. Meanwhile, the parts are too large, so that the weight is large. The requirements of miniaturization, integration, light weight and long service life of the electric centrifugal pump cannot be met.
Disclosure of Invention
The technical problems solved by the invention are as follows: provides a miniature motor and an electric centrifugal pump with small volume, light weight and long service life.
The technical scheme of the invention is as follows: the motor is internally filled with working fluid, and the working fluid is ethylene glycol aqueous solution;
the motor shaft support bearing is a water-lubricated ceramic ball bearing, and the rolling body material of the bearing is Si3N4A material. The invention provides a wet motor, which selects special working fluid and special application environment, and is provided with a special bearing. The technical scheme can meet the use requirements of special environments on one hand and pass a large number of tests on the other handThe motor has long service life.
Preferably, the inner surface of the motor stator is sleeved with a titanium alloy isolation sleeve. This technical scheme further discloses the inside special construction of motor, and this structure can fully guarantee the life of motor.
Preferably, the rotor and the bearing of the motor are immersed in the working fluid. This technical scheme has improved the inside whole moist effect of trading and cooling of motor, has further guaranteed the life of motor.
Preferably, the motor is a brushless direct current motor. This technical scheme has selected for use this type of motor, and simple structure has improved whole service reliability and life-span.
The motor of the electric centrifugal pump is the motor. The technical scheme provides a specific application embodiment of the motor, and the centrifugal pump under the technical scheme has the advantages of small volume, light weight and long service life.
Preferably, the centrifugal pump impeller cavity is communicated with the motor inner cavity, and the impeller is soaked in the working fluid. This technical scheme passes through the intercommunication of casing inner chamber, has avoided dynamic seal's reliability hidden danger on the one hand, has simplified inner structure, and on the other hand provides sufficient lubrication and cooling for the impeller, improves whole technical scheme's reliability and life.
Preferably, the central section of the stator of the electric machine in the radial direction is located on a different plane from the central section of the rotor in the radial direction. Compared with the position relation between the motor rotor and the stator in the prior art, the axial position of the motor rotor and the motor stator is adjusted, the radial central cross sections of the motor rotor and the motor stator are staggered, namely, the motor stator is not positioned in the same plane, the motor stator generates forward or backward axial force artificially, the axial force generated when the impeller works is offset, the stress of the bearing is reduced when the impeller works, and the service life and the service reliability of the bearing are greatly improved.
Preferably, the centrifugal pump impeller is semi-open. The technical scheme can meet the use requirements of special environments on one hand and is easy to process and manufacture on the other hand.
Preferably, the material of the centrifugal pump impeller is aluminum material or titanium alloy material. According to the technical scheme, the structural weight of the centrifugal pump is greatly reduced through selection of specific materials.
Preferably, the housing of the centrifugal pump is of aluminium material. According to the technical scheme, the structural weight of the centrifugal pump is greatly reduced through selection of specific materials.
Drawings
FIG. 1 is a schematic structural view of a miniature electric centrifugal pump;
fig. 2 is a schematic view of the installation positions of the stator and the rotor of the motor.
In the figure: 1. volute 2, shaft end nut 3, impeller 4, sealing ring 5, key 6 and sealing ring
7. Screw 8, bearing 9, motor 21, titanium alloy spacer sleeve
Detailed Description
The centrifugal pump of the present invention is further described with reference to fig. 1 and 2.
A miniature long-life motor and an electric centrifugal pump comprise a volute 1, a shaft end nut 2, an impeller 3, a sealing ring 4, a key 5, a sealing ring 6, a screw 7, a bearing 8 and a motor 9;
the electric centrifugal pump mainly comprises a centrifugal pump and a brushless direct current motor. The motor shaft is the step shaft, and the motor shaft middle section has 2 key grooves of equipartition, and the motor shaft anterior segment is the screw thread section. The impeller is arranged on a motor shaft through a key 2, and is pressed tightly and stopped against the end face of the stepped shaft through a shaft end nut. The lower end surface and the radial direction of the volute are provided with 2 rubber ring grooves, and the volute is fixed on the end surface of the motor through 4 screws.
The motor adopts a wet motor, so that a motor rotor, a bearing and a centrifugal impeller are completely soaked in working liquid, and the cooling and lubrication of the bearing can be ensured.
The bearing is a rolling bearing. Preferably water lubricated ceramic ball bearings. The rolling body is made of Si3N4 ceramic material, has the advantages of high hardness, large elastic modulus, high temperature resistance, corrosion resistance, wear resistance, no magnetism, small thermal expansion coefficient and the like, and has certain self-lubricating property. The novel polyimide self-lubricating composite material is selected for the retainer, and the rechecking material has the characteristics of high strength, high and low temperature resistance, wear resistance, self-lubrication and the like.
The impeller adopts a semi-open impeller, can be machined, has smooth roughness on the surface of a flow channel, and is beneficial to improving the efficiency of the pump. In order to improve the pressure head and the efficiency of the pump, a structure that 4 blades with different lengths are evenly arranged at intervals is adopted. To reduce weight, the impeller material is selected from wrought aluminum and the surface is chromic acid anodized to prevent corrosion in the working medium.
The spiral volute is adopted in the volute, the inlet guide pipe, the outlet diffuser pipe and the volute of the centrifugal pump are designed into a whole, the structure of the pump body is simple, disturbance caused by unsmooth flow channel when a plurality of parts are switched is avoided, loss of liquid in the flow channel is reduced, and meanwhile, the designed volute structure can be completely machined, so that the flow channel is smooth, and the efficiency is improved. To reduce weight, the volute is also made of wrought aluminium and the surface is chromic acid anodized to prevent corrosion.
As shown in figure 2, in the process of assembling the motor stator and the motor rotor, the center of the stator and the center of the rotor are given to be dislocated, namely are not in the same plane any more, the motor stator generates forward or backward axial force artificially to offset the axial force generated when the impeller works, the stress of a bearing is reduced when the impeller works, and the service life and the service reliability of the bearing are greatly improved.
The inner surface of the inner cavity of the motor stator is sleeved with a titanium alloy isolation sleeve 21, the thickness of the isolation sleeve is smaller than 0.5mm, and the function is to isolate a working medium from a motor rotor, so that the corrosion of the stator caused by working is avoided, and the service life of a product is prolonged.
The product has stable performance and reliable work in the test and application processes, and each technical index meets the task requirement and passes the examination of each test and practical application. The ground test piece completes the continuous service life assessment of 60000 hours, has stable performance and is still in a continuous test. The product has been in continuous operation for 4 years in orbit along with the Tiangong I target aircraft, and is more than 35000 hours, and still in continuous operation, the product is also directly applied to the Tiangong II target aircraft environmental control and life protection subsystem. The research results of projects are currently being applied in the development of space station products.
The development of the miniature electric centrifugal pump breaks through a plurality of key technologies, meets the use requirements of complex ground and space environmental conditions, makes an important contribution to the successful operation of the environment-control and life-saving subsystem of the Tiangong I target aircraft, and provides technical reserve for building space stations in China.
The product reaches the advanced international and domestic level, can be popularized and applied to other military and civil fields, and has great military and social benefits.
Claims (10)
1. The motor is characterized in that working fluid is filled in the motor, and the working fluid is ethylene glycol aqueous solution;
the motor shaft support bearing is a water-lubricated ceramic ball bearing, and the rolling body material of the bearing is Si3N4A material.
2. A miniature long life motor as claimed in claim 1, wherein said motor stator is internally fitted with a titanium alloy spacer sleeve.
3. A miniature long life motor as claimed in claim 1, wherein the rotor and bearings of said motor are immersed in said working fluid.
4. A miniature long life motor as claimed in claim 1, wherein said motor is a brushless dc motor.
5. An electric centrifugal pump, characterized in that the motor of the centrifugal pump is the motor of any one of claims 1-4.
6. The electric centrifugal pump of claim 5 wherein said centrifugal pump impeller chamber is in communication with a motor chamber, said impeller being immersed in said working fluid.
7. An electric centrifugal pump according to claim 5, wherein the central section of the motor stator in the radial direction is located on a different plane from the central section of the rotor in the radial direction.
8. An electric centrifugal pump according to claim 5, wherein said centrifugal pump impeller is semi-open.
9. An electric centrifugal pump according to claim 5, wherein the material of the centrifugal pump impeller is aluminum or titanium alloy.
10. An electric centrifugal pump according to claim 5, wherein the housing of the centrifugal pump is of aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196879.3A CN112398281A (en) | 2020-10-30 | 2020-10-30 | Miniature long-life motor and electric centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196879.3A CN112398281A (en) | 2020-10-30 | 2020-10-30 | Miniature long-life motor and electric centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112398281A true CN112398281A (en) | 2021-02-23 |
Family
ID=74597760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011196879.3A Pending CN112398281A (en) | 2020-10-30 | 2020-10-30 | Miniature long-life motor and electric centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112398281A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2558795Y (en) * | 2002-06-19 | 2003-07-02 | 中国航天科技集团公司第十一研究所(京) | Small circulating pump for water cooling system of fuel cell engine |
| CN2611639Y (en) * | 2003-03-26 | 2004-04-14 | 孔庆成 | Wholly shielded electric diving pump |
| CN1941569A (en) * | 2005-09-27 | 2007-04-04 | 日本电产三协株式会社 | Sealed electric-motor and sealed pump |
| JP2007127135A (en) * | 2007-02-21 | 2007-05-24 | Ebara Corp | Method of circulating pump handling liquid in canned motor pump |
| CN201448251U (en) * | 2009-07-07 | 2010-05-05 | 汪普军 | Water pump |
| KR101457816B1 (en) * | 2013-10-04 | 2014-11-03 | 지엠비코리아 주식회사 | Electric water pump |
| CN105896824A (en) * | 2016-06-16 | 2016-08-24 | 日本电产凯宇汽车电器（江苏）有限公司 | Electric water pump with water cooling and water lubricating functions |
| CN105987006A (en) * | 2015-02-04 | 2016-10-05 | 昆山江津长抗干磨磁力泵有限公司 | Corrosion-resisting and anti-dry-grinding magnetic axially split pump |
| CN106133326A (en) * | 2013-11-28 | 2016-11-16 | 艾希蒂有限公司 | For LNG, lighter hydrocarbons and other non-conductive and low temperature submersible pumps of non-corrosive fluids |
| CN107542672A (en) * | 2016-06-28 | 2018-01-05 | 河南航天液压气动技术有限公司 | A kind of high rotating speed centrifugal pump of low discharge |
| CN110645186A (en) * | 2019-11-01 | 2020-01-03 | 合肥新沪屏蔽泵有限公司 | Motor sealing structure for liquid cooling pump |
| CN110685927A (en) * | 2019-11-04 | 2020-01-14 | 合肥新沪屏蔽泵有限公司 | Liquid cooling pump |
| CN111794973A (en) * | 2020-06-30 | 2020-10-20 | 杭州三洋泵业有限公司 | Magnetic centrifugal pump for conveying granular medium |
-
2020
- 2020-10-30 CN CN202011196879.3A patent/CN112398281A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2558795Y (en) * | 2002-06-19 | 2003-07-02 | 中国航天科技集团公司第十一研究所(京) | Small circulating pump for water cooling system of fuel cell engine |
| CN2611639Y (en) * | 2003-03-26 | 2004-04-14 | 孔庆成 | Wholly shielded electric diving pump |
| CN1941569A (en) * | 2005-09-27 | 2007-04-04 | 日本电产三协株式会社 | Sealed electric-motor and sealed pump |
| JP2007127135A (en) * | 2007-02-21 | 2007-05-24 | Ebara Corp | Method of circulating pump handling liquid in canned motor pump |
| CN201448251U (en) * | 2009-07-07 | 2010-05-05 | 汪普军 | Water pump |
| KR101457816B1 (en) * | 2013-10-04 | 2014-11-03 | 지엠비코리아 주식회사 | Electric water pump |
| CN106133326A (en) * | 2013-11-28 | 2016-11-16 | 艾希蒂有限公司 | For LNG, lighter hydrocarbons and other non-conductive and low temperature submersible pumps of non-corrosive fluids |
| CN105987006A (en) * | 2015-02-04 | 2016-10-05 | 昆山江津长抗干磨磁力泵有限公司 | Corrosion-resisting and anti-dry-grinding magnetic axially split pump |
| CN105896824A (en) * | 2016-06-16 | 2016-08-24 | 日本电产凯宇汽车电器（江苏）有限公司 | Electric water pump with water cooling and water lubricating functions |
| CN107542672A (en) * | 2016-06-28 | 2018-01-05 | 河南航天液压气动技术有限公司 | A kind of high rotating speed centrifugal pump of low discharge |
| CN110645186A (en) * | 2019-11-01 | 2020-01-03 | 合肥新沪屏蔽泵有限公司 | Motor sealing structure for liquid cooling pump |
| CN110685927A (en) * | 2019-11-04 | 2020-01-14 | 合肥新沪屏蔽泵有限公司 | Liquid cooling pump |
| CN111794973A (en) * | 2020-06-30 | 2020-10-20 | 杭州三洋泵业有限公司 | Magnetic centrifugal pump for conveying granular medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108266379A (en) | The double-impeller pump of symmetrical impeller arrangement | |
| CN111173658A (en) | Low-inlet-pressure high-supercharging-capacity combined electric pump | |
| CN112398281A (en) | Miniature long-life motor and electric centrifugal pump | |
| CN2784625Y (en) | Improved hot-water circulating pump | |
| CN101985942A (en) | Tangent pump for ships | |
| CN111878452A (en) | Impeller assembly for multistage submersible pump | |
| CN108678992B (en) | Production method of impeller for electric fuel pump | |
| CN111075832A (en) | Sliding bearing | |
| CN210565294U (en) | Novel magnetic drive pump bearing connection structure | |
| CN215672848U (en) | Self-balancing multistage centrifugal pump with efficient throttling seal | |
| CN202955024U (en) | Long-axis pump with reverse auxiliary impeller | |
| CN210218158U (en) | Air suspension centrifugal vacuum pump | |
| CN214887936U (en) | High-efficient double entry pump | |
| CN209805569U (en) | Unidirectional rotation permanent magnet high-speed motor and bidirectional air bearing thereof | |
| CN205331244U (en) | Novel canned motor thrust bearing foundation subassembly | |
| CN212360291U (en) | Impeller assembly for multistage submersible pump | |
| CN103603822A (en) | Rotating casing pump with center bearings adopted at two ends of collecting pipe | |
| CN210608764U (en) | Long-life deep sea submersible motor | |
| CN219639079U (en) | Liquid cooling pump | |
| CN217440307U (en) | Two-stage horizontal centrifugal pump with lateral suction and vertical discharge and two-end support | |
| CN204961379U (en) | Dry -type pump bearing retainer | |
| CN215256852U (en) | Centrifugal pump | |
| CN211343369U (en) | Small vortex submersible electric pump | |
| CN220705949U (en) | Heat supply network circulating pump for power plant | |
| CN217502088U (en) | Non-cantilever energy-saving centrifugal pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210223 |
|
| RJ01 | Rejection of invention patent application after publication |