US20010043871A1 - Magnetically coupled canned rotary pump - Google Patents
Magnetically coupled canned rotary pump Download PDFInfo
- Publication number
- US20010043871A1 US20010043871A1 US09/862,432 US86243201A US2001043871A1 US 20010043871 A1 US20010043871 A1 US 20010043871A1 US 86243201 A US86243201 A US 86243201A US 2001043871 A1 US2001043871 A1 US 2001043871A1
- Authority
- US
- United States
- Prior art keywords
- rotor
- sleeve
- pump
- axially
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F04D13/021—Units comprising pumps and their driving means containing a coupling
- F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
- F04D13/027—Details of the magnetic circuit
-
- 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
- F04D13/021—Units comprising pumps and their driving means containing a coupling
- F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
- F04D13/026—Details of the bearings
Definitions
- the present invention relates to a pump. More particu- larly this invention concerns a rotary pump of the canned type with magnetic coupling to a pump rotor.
- a standard magnetically coupled can-type pump has a housing plate having a front face and a back face, a can fixed to the plate and defining a chamber on the back face thereof, and a bearing sleeve in the can fixed to the plate and extending rearward from the back face thereof along an axis.
- a rotor shaft extending axially through the sleeve is supported by bearings in the sleeve for rotation therein about the axis.
- An impeller is provided on a front end of the rotor shaft in a pump chamber at the front face of the housing plate.
- a rotor body fixed to a rear end of the shaft extends axially forward in the can around the bearing sleeve. It carries a plurality of permanent magnets that coact with another rotor or stator outside the can to rotate the impeller.
- the rotor of the pump is therefore such that no electricity flows in it to create a shock hazard so that it can run wet.
- the interior of the can is filled with the liquid being moved by the pump, for instance coolant water or lubricating oil.
- the rotor body is formed with one or more axially throughgoing passages and radially extending vanes are provided on the rear end of the rotor body. As the rotor spins, the vanes project fluid outward, pulling more axially in through the rotor body and thereby cooling and/or lubricating it and its bearings.
- Such radial vanes have only limited pumping capacity at high pressure. Making them bigger, while it increases the volume of liquid moved, increases the amount of cavitation and the load on the rotor, decreasing pump efficiency. Furthermore the liquid is moved most forcibly between the rear end of the pump and the can, not in the central region of the body where such movement is most needed.
- Another object is the provision of such an improved can-type pump which overcomes the above-given disadvantages, that is which moves the liquid at a good rate through the center of the rotor so as to efficiently cool, flush, and lubricate it.
- a pump has according to the invention a housing plate having a front face and a back face, a housing can fixed to the plate and defining a chamber on the back face thereof, a bearing sleeve in the can fixed to the plate and extending rearward from the back face thereof along an axis, and a rotor shaft extending axially through the sleeve and having a front end and a rear end. Bearings support the rotor shaft in the sleeve for rotation therein about the axis and an impeller is carried on the rotor-shaft front end in a pump chamber at the front face of the housing plate.
- a rotor body fixed to the shaft rear end extends axially forward in the can around the bearing sleeve.
- the rotor body defines an annular space around the bearing sleeve and is formed with at least one axially throughgoing passage open axially forward into the space and axially rearward into the can.
- a vane in the passage is angled for pumping liquid from inside the can axially forward into the space on rotation of the rotor about the axis.
- the axially effective vanes are relatively close to the rotation axis of the rotation-symmetrical subassembly comprised of the shaft and rotor body.
- the vanes can be planar or curved and extend basically along planes forming angles of 5° to 15° with the rotor axis. Such vanes move a considerable volume of liquid with minimal cavitation, and direct the flow to the core of the rotor so as to drive it through the bearings and parts most needing lubrication and/or cooling.
- the vanes can form the only connection between the rotor shaft, which can include a sleeve, and the rotor body, in which case the passage is annular, a plurality of the vanes are used, and they are angularly equispaced about the rotor axis. Since there are no vanes on the rear end of the rotor body, erosion of the inner face of the rear end of the can is reduced greatly. Overall the pump according to the invention will use less work to move more liquid than the prior-art systems.
- the sleeve according to the invention has a rear end open into the space axially forward of the vane so that the liquid pumped by the vanes enters the rear end of the bearing sleeve and lubricates the bearings.
- the rotor body carries magnets that cooperate with a magnetic rotor rotatable outside the can about the axis.
- the bearings are ceramic.
- the plate according to the invention is formed with a passage communicating with an interior of the can forward of the rotor body and the pump chamber.
- the rotor body is formed integrally with the vane and with a sleeve fixed to and snugly coaxially surrounding the shaft.
- the can is nonmagnetic and generally cylindrical.
- a rotary pump 1 has an axial-input radial-output impeller 2 carried on a front end of a shaft 3 of a magnetically driven rotor 14 and rotatable thereby about an axis A.
- the shaft 3 extends axially through a stationary housing wall 11 on whose front side is a pump chamber 9 holding the impeller 2 and on whose back side is secured a closed dielectric can 10 surrounding the rotor 14 .
- a bearing sleeve 8 is fixed to the wall 11 and extends outward therefrom along the axis A and another sleeve 12 is fixed to and surrounds the shaft 3 .
- the rotor 14 is supported on the sleeve 8 by two-part ceramic radial-force bearings 4 and 5 flanked by two ceramic axial-force bearings 6 and 7 .
- the bearings 4 through 9 engage the shaft sleeve 12 and allow the rotor 14 to rotate freely about the axis A.
- the rotor 14 has a rear end 15 connected to the rear end of a cup-shaped magnet holder or body 17 that coaxially surrounds the rear end of the bearing sleeve 8 and that carries a plurality of permanent magnets 18 that cooperate with a drive element 16 that is rotated about the axis A outside the can 10 by a motor as known per se.
- the rotor body 17 defines with the bearing sleeve 8 an axially extending annular space 19 and, with the can 10 and radially outward therefrom, an axially extending annular space 20 .
- the front ends of the spaces 19 and 20 communicate with the pump chamber 9 via a passage 23 and their rear ends open into a chamber 13 defined between the inner face of the end of the can 10 and the rear face of the rotor body 17 .
- An annular and axially extending inner space 24 holding the bearings 4 through 9 is defined between the rotor sleeve 12 and the housing sleeve 8
- an annular passage 21 connects the rear end of the space 19 with the chamber 13 at the rear end of the can 10 .
- the passage 21 is provided with two to four, here three, angled vanes 22 that extend at angles of between 5° and 15° to respective planes including the axis A.
- the vanes 22 draw liquid from the chamber 13 in and force it not only inward through the space 19 , but forward into the space 24 between the bearing sleeve 24 and the rotor sleeve 12 . This serves to lubricate and/or cool the bearings 4 - 7 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- The present invention relates to a pump. More particu- larly this invention concerns a rotary pump of the canned type with magnetic coupling to a pump rotor.
- A standard magnetically coupled can-type pump has a housing plate having a front face and a back face, a can fixed to the plate and defining a chamber on the back face thereof, and a bearing sleeve in the can fixed to the plate and extending rearward from the back face thereof along an axis. A rotor shaft extending axially through the sleeve is supported by bearings in the sleeve for rotation therein about the axis. An impeller is provided on a front end of the rotor shaft in a pump chamber at the front face of the housing plate. A rotor body fixed to a rear end of the shaft extends axially forward in the can around the bearing sleeve. It carries a plurality of permanent magnets that coact with another rotor or stator outside the can to rotate the impeller.
- The rotor of the pump is therefore such that no electricity flows in it to create a shock hazard so that it can run wet. Thus the interior of the can is filled with the liquid being moved by the pump, for instance coolant water or lubricating oil. The rotor body is formed with one or more axially throughgoing passages and radially extending vanes are provided on the rear end of the rotor body. As the rotor spins, the vanes project fluid outward, pulling more axially in through the rotor body and thereby cooling and/or lubricating it and its bearings.
- Such radial vanes have only limited pumping capacity at high pressure. Making them bigger, while it increases the volume of liquid moved, increases the amount of cavitation and the load on the rotor, decreasing pump efficiency. Furthermore the liquid is moved most forcibly between the rear end of the pump and the can, not in the central region of the body where such movement is most needed.
- It is therefore an object of the present invention to provide an improved can-type pump.
- Another object is the provision of such an improved can-type pump which overcomes the above-given disadvantages, that is which moves the liquid at a good rate through the center of the rotor so as to efficiently cool, flush, and lubricate it.
- A pump has according to the invention a housing plate having a front face and a back face, a housing can fixed to the plate and defining a chamber on the back face thereof, a bearing sleeve in the can fixed to the plate and extending rearward from the back face thereof along an axis, and a rotor shaft extending axially through the sleeve and having a front end and a rear end. Bearings support the rotor shaft in the sleeve for rotation therein about the axis and an impeller is carried on the rotor-shaft front end in a pump chamber at the front face of the housing plate. A rotor body fixed to the shaft rear end extends axially forward in the can around the bearing sleeve. The rotor body defines an annular space around the bearing sleeve and is formed with at least one axially throughgoing passage open axially forward into the space and axially rearward into the can. In accordance with the invention a vane in the passage is angled for pumping liquid from inside the can axially forward into the space on rotation of the rotor about the axis.
- The axially effective vanes are relatively close to the rotation axis of the rotation-symmetrical subassembly comprised of the shaft and rotor body. The vanes can be planar or curved and extend basically along planes forming angles of 5° to 15° with the rotor axis. Such vanes move a considerable volume of liquid with minimal cavitation, and direct the flow to the core of the rotor so as to drive it through the bearings and parts most needing lubrication and/or cooling. In fact the vanes can form the only connection between the rotor shaft, which can include a sleeve, and the rotor body, in which case the passage is annular, a plurality of the vanes are used, and they are angularly equispaced about the rotor axis. Since there are no vanes on the rear end of the rotor body, erosion of the inner face of the rear end of the can is reduced greatly. Overall the pump according to the invention will use less work to move more liquid than the prior-art systems.
- The sleeve according to the invention has a rear end open into the space axially forward of the vane so that the liquid pumped by the vanes enters the rear end of the bearing sleeve and lubricates the bearings.
- The rotor body carries magnets that cooperate with a magnetic rotor rotatable outside the can about the axis. In addition the bearings are ceramic. Thus whether oil or water is flowed through the rotor, the bearings will not be damaged and there will be no chance of a short circuit.
- The plate according to the invention is formed with a passage communicating with an interior of the can forward of the rotor body and the pump chamber. In addition the rotor body is formed integrally with the vane and with a sleeve fixed to and snugly coaxially surrounding the shaft. The can is nonmagnetic and generally cylindrical.
- The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing whose sole figure is a partly diagrammatic axial section through a pump according to the invention.
- As seen in the drawing, a rotary pump1 has an axial-input radial-
output impeller 2 carried on a front end of ashaft 3 of a magnetically drivenrotor 14 and rotatable thereby about an axis A. Theshaft 3 extends axially through a stationary housing wall 11 on whose front side is a pump chamber 9 holding theimpeller 2 and on whose back side is secured a closed dielectric can 10 surrounding therotor 14. Abearing sleeve 8 is fixed to the wall 11 and extends outward therefrom along the axis A and anothersleeve 12 is fixed to and surrounds theshaft 3. - The
rotor 14 is supported on thesleeve 8 by two-part ceramic radial-force bearings 4 and 5 flanked by two ceramic axial-force bearings 6 and 7. The bearings 4 through 9 engage theshaft sleeve 12 and allow therotor 14 to rotate freely about the axis A. Therotor 14 has arear end 15 connected to the rear end of a cup-shaped magnet holder orbody 17 that coaxially surrounds the rear end of thebearing sleeve 8 and that carries a plurality ofpermanent magnets 18 that cooperate with adrive element 16 that is rotated about the axis A outside thecan 10 by a motor as known per se. Therotor body 17 defines with thebearing sleeve 8 an axially extendingannular space 19 and, with thecan 10 and radially outward therefrom, an axially extendingannular space 20. The front ends of thespaces passage 23 and their rear ends open into achamber 13 defined between the inner face of the end of thecan 10 and the rear face of therotor body 17. An annular and axially extendinginner space 24 holding the bearings 4 through 9 is defined between therotor sleeve 12 and thehousing sleeve 8 - According to the invention an annular passage21 connects the rear end of the
space 19 with thechamber 13 at the rear end of thecan 10. The passage 21 is provided with two to four, here three,angled vanes 22 that extend at angles of between 5° and 15° to respective planes including the axis A. Thus, when therotor 14 turns in a standard forward direction, thevanes 22 draw liquid from thechamber 13 in and force it not only inward through thespace 19, but forward into thespace 24 between thebearing sleeve 24 and therotor sleeve 12. This serves to lubricate and/or cool the bearings 4-7.
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10024955A DE10024955A1 (en) | 2000-05-22 | 2000-05-22 | Centrifugal pump with magnetic coupling |
DE10024955.8 | 2000-05-22 | ||
DE10024955 | 2000-05-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010043871A1 true US20010043871A1 (en) | 2001-11-22 |
US6457951B2 US6457951B2 (en) | 2002-10-01 |
Family
ID=7642886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/862,432 Expired - Lifetime US6457951B2 (en) | 2000-05-22 | 2001-05-21 | Magnetically coupled canned rotary pump |
Country Status (4)
Country | Link |
---|---|
US (1) | US6457951B2 (en) |
EP (1) | EP1158173B1 (en) |
AT (1) | ATE332444T1 (en) |
DE (2) | DE10024955A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050254974A1 (en) * | 2002-08-31 | 2005-11-17 | Dieter Hoffmeier | Submersible motor-driven pump with an anti-frost device |
US20070065317A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Air blower for a motor-driven compressor |
US20100239442A1 (en) * | 2007-10-09 | 2010-09-23 | Audun Grynning | Protection system for subsea seawater injection pumps |
US20110229357A1 (en) * | 2010-03-16 | 2011-09-22 | Toyota Motor Engineering & Manufacturing North America, Inc. | Pump assembly |
CN102518590A (en) * | 2011-12-23 | 2012-06-27 | 上海电机学院 | Transverse magnetic field magnetic pump |
US9243481B1 (en) * | 2013-03-12 | 2016-01-26 | Geotek Energy, Llc | Magnetically coupled expander pump with axial flow path |
US20160084256A1 (en) * | 2013-05-08 | 2016-03-24 | Ksb Aktiengesellschaft | Pump Arrangement |
US20160123328A1 (en) * | 2013-05-08 | 2016-05-05 | Ksb Aktiengesellschaft | Pump Arrangement and Method for Producing a Containment Shell for the Pump Arrangement |
WO2017162775A1 (en) * | 2016-03-22 | 2017-09-28 | Klaus Union Gmbh & Co. Kg | Magnetic drive pump |
WO2022129463A1 (en) * | 2020-12-17 | 2022-06-23 | KSB SE & Co. KGaA | Magnetic drive pump assembly |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6722854B2 (en) * | 2001-01-24 | 2004-04-20 | Sundyne Corporation | Canned pump with ultrasonic bubble detector |
US8584472B2 (en) * | 2002-11-13 | 2013-11-19 | Deka Products Limited Partnership | Water vapor distillation apparatus, method and system |
US7183683B2 (en) * | 2005-06-23 | 2007-02-27 | Peopleflo Manufacturing Inc. | Inner magnet of a magnetic coupling |
US7549205B2 (en) * | 2005-06-24 | 2009-06-23 | Peopleflo Manufacturing Inc. | Assembly and method for pre-stressing a magnetic coupling canister |
US11826681B2 (en) * | 2006-06-30 | 2023-11-28 | Deka Products Limited Partneship | Water vapor distillation apparatus, method and system |
DE102006040130A1 (en) * | 2006-08-26 | 2008-02-28 | Ksb Aktiengesellschaft | Delivery pump for delivery and dosing of fluid materials e.g. chemical, pharmaceutical or cosmetic components, has variable-speed drive and is configured as single-stage centrifugal pump having radial wheel |
CN102146928A (en) * | 2011-06-03 | 2011-08-10 | 浙江腾宇泵阀设备有限公司 | Device for preventing magnetic pump from no-load, overload, magnetic steel slipping, rotor blockage and abrasion |
WO2014018896A1 (en) | 2012-07-27 | 2014-01-30 | Deka Products Limited Partnership | Control of conductivity in product water outlet for evaporation apparatus |
CN103573682A (en) * | 2012-07-31 | 2014-02-12 | 上海佰诺泵阀有限公司 | Magnetic drive pump with bearing block |
US9771938B2 (en) | 2014-03-11 | 2017-09-26 | Peopleflo Manufacturing, Inc. | Rotary device having a radial magnetic coupling |
US9920764B2 (en) | 2015-09-30 | 2018-03-20 | Peopleflo Manufacturing, Inc. | Pump devices |
DE102017206089B4 (en) * | 2017-04-10 | 2020-01-16 | BSH Hausgeräte GmbH | Wet running pump and household appliance |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1496035A (en) * | 1974-07-18 | 1977-12-21 | Iwaki Co Ltd | Magnetically driven centrifugal pump |
US4080112A (en) * | 1976-02-03 | 1978-03-21 | March Manufacturing Company | Magnetically-coupled pump |
JPS6352992U (en) * | 1986-09-25 | 1988-04-09 | ||
DE3636404A1 (en) * | 1986-10-25 | 1988-04-28 | Richter Chemie Technik Gmbh | MAGNETIC CENTRIFUGAL PUMP |
DE3943273C2 (en) * | 1989-12-29 | 1996-07-18 | Klaus Union Armaturen | Horizontal centrifugal pump with canned magnetic coupling |
DE4009199A1 (en) * | 1990-03-22 | 1991-09-26 | Rheinhuette Gmbh & Co | Dry running protection for magnetic coupling pump - has provision of two auxiliary wheels for lubrication and cooling |
US5288213A (en) * | 1992-06-03 | 1994-02-22 | Pmc Liquiflo Equipment Co., Inc. | Pump having an internal pump |
US5248245A (en) * | 1992-11-02 | 1993-09-28 | Ingersoll-Dresser Pump Company | Magnetically coupled centrifugal pump with improved casting and lubrication |
-
2000
- 2000-05-22 DE DE10024955A patent/DE10024955A1/en not_active Withdrawn
-
2001
- 2001-01-04 AT AT01100290T patent/ATE332444T1/en not_active IP Right Cessation
- 2001-01-04 EP EP01100290A patent/EP1158173B1/en not_active Expired - Lifetime
- 2001-01-04 DE DE50110376T patent/DE50110376D1/en not_active Expired - Lifetime
- 2001-05-21 US US09/862,432 patent/US6457951B2/en not_active Expired - Lifetime
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050254974A1 (en) * | 2002-08-31 | 2005-11-17 | Dieter Hoffmeier | Submersible motor-driven pump with an anti-frost device |
US9261104B2 (en) | 2005-09-19 | 2016-02-16 | Ingersoll-Rand Company | Air blower for a motor-driven compressor |
US20070065317A1 (en) * | 2005-09-19 | 2007-03-22 | Ingersoll-Rand Company | Air blower for a motor-driven compressor |
US20100239442A1 (en) * | 2007-10-09 | 2010-09-23 | Audun Grynning | Protection system for subsea seawater injection pumps |
US8556600B2 (en) * | 2007-10-09 | 2013-10-15 | Aker Subsea As | Protection system for subsea seawater injection pumps |
US20110229357A1 (en) * | 2010-03-16 | 2011-09-22 | Toyota Motor Engineering & Manufacturing North America, Inc. | Pump assembly |
US8496448B2 (en) * | 2010-03-16 | 2013-07-30 | Toyota Motor Engineering & Manufacturing North America, Inc. | Pump assembly |
CN102518590A (en) * | 2011-12-23 | 2012-06-27 | 上海电机学院 | Transverse magnetic field magnetic pump |
US9243481B1 (en) * | 2013-03-12 | 2016-01-26 | Geotek Energy, Llc | Magnetically coupled expander pump with axial flow path |
US20160084256A1 (en) * | 2013-05-08 | 2016-03-24 | Ksb Aktiengesellschaft | Pump Arrangement |
US20160123328A1 (en) * | 2013-05-08 | 2016-05-05 | Ksb Aktiengesellschaft | Pump Arrangement and Method for Producing a Containment Shell for the Pump Arrangement |
US10288073B2 (en) * | 2013-05-08 | 2019-05-14 | Ksb Aktiengesellschaft | Pump arrangement |
US10480514B2 (en) * | 2013-05-08 | 2019-11-19 | Ksb Aktiengesellschaft | Pump arrangement and method for producing a containment shell for the pump arrangement |
WO2017162775A1 (en) * | 2016-03-22 | 2017-09-28 | Klaus Union Gmbh & Co. Kg | Magnetic drive pump |
CN109072927A (en) * | 2016-03-22 | 2018-12-21 | 克劳斯联合有限两合公司 | Magnetic force driving pump |
US10830240B2 (en) | 2016-03-22 | 2020-11-10 | Klaus Union Gmbh & Co. Kg | Magnetic drive pump |
RU2746491C2 (en) * | 2016-03-22 | 2021-04-14 | Клаус Юнион Гмбх Унд Ко. Кг | Pump with electromagnetic clutch |
WO2022129463A1 (en) * | 2020-12-17 | 2022-06-23 | KSB SE & Co. KGaA | Magnetic drive pump assembly |
Also Published As
Publication number | Publication date |
---|---|
EP1158173B1 (en) | 2006-07-05 |
DE50110376D1 (en) | 2006-08-17 |
US6457951B2 (en) | 2002-10-01 |
EP1158173A2 (en) | 2001-11-28 |
ATE332444T1 (en) | 2006-07-15 |
DE10024955A1 (en) | 2001-11-29 |
EP1158173A3 (en) | 2004-03-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6457951B2 (en) | Magnetically coupled canned rotary pump | |
US6280157B1 (en) | Sealless integral-motor pump with regenerative impeller disk | |
US6554576B2 (en) | Magnetically coupled and self-lubricated pump with bearing burnout protection | |
US4013384A (en) | Magnetically driven centrifugal pump and means providing cooling fluid flow | |
US6616421B2 (en) | Direct drive compressor assembly | |
DK2800904T3 (en) | ROTODYNAMIC PUMP WITH PERMANENT MAGNETIC CONNECTION INTO THE IMPELLER | |
US5649811A (en) | Combination motor and pump assembly | |
CN112534141B (en) | Pump, in particular for a liquid circuit in a vehicle | |
CA2478349A1 (en) | Centrifugal pump with switched reluctance motor drive | |
CN205207206U (en) | Miniature pump integral type magnetic drive pump based on axial motor drive | |
EP2798222A1 (en) | Rotodynamic pump with electro-magnet coupling inside the impeller | |
WO2001009512A1 (en) | Shaftless canned rotor inline pipe pump | |
US4615662A (en) | Axial thrust compensation for centrifugal pump | |
US6215212B1 (en) | Shaftless rotor construction | |
JPH02196191A (en) | Electric motor driven pump | |
US3119343A (en) | Motor driven pumps | |
CN101576085A (en) | Low plus hydrophobic magnetic pump | |
CN216343036U (en) | Magnetic suspension hydrogen circulating pump | |
CN211930441U (en) | Oil-cooled motor direct-drive type cycloid pump | |
CN220415794U (en) | Pipeline pump for diving and pipeline circulation | |
CN201396289Y (en) | Low watering-drainage magnetic pump | |
CN105179232B (en) | Disc magnetic connects chemical industry sliding-vane pump | |
CN110671334A (en) | Magnetic cyclone pump | |
EP1227247B1 (en) | Integrated regenerative motor pump | |
CN116531654B (en) | Micro pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ITT RICHTER CHEMIE-TECHNIK GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RENNETT, ULRICH;SETT, MANFRED;MERSCH, ALFRED;REEL/FRAME:011847/0232;SIGNING DATES FROM 20010515 TO 20010516 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: ITT MANUFACTURING ENTERPRISES, INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ITT RICHTER CHEMIE-TECHNIK GMBH;REEL/FRAME:017073/0732 Effective date: 20051017 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |