US20200056616A1 - Canned motor pump and method for manufacturing such a motor pump - Google Patents

Canned motor pump and method for manufacturing such a motor pump Download PDF

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Publication number
US20200056616A1
US20200056616A1 US16/342,990 US201716342990A US2020056616A1 US 20200056616 A1 US20200056616 A1 US 20200056616A1 US 201716342990 A US201716342990 A US 201716342990A US 2020056616 A1 US2020056616 A1 US 2020056616A1
Authority
US
United States
Prior art keywords
motor pump
shaft
wheel
canned motor
rotor
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.)
Abandoned
Application number
US16/342,990
Other languages
English (en)
Inventor
Emile Thomas Di Serio
Xavier De Bengy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Jean Industries SAS
Original Assignee
Saint Jean Industries SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saint Jean Industries SAS filed Critical Saint Jean Industries SAS
Assigned to SAINT JEAN INDUSTRIES reassignment SAINT JEAN INDUSTRIES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DI SERIO, EMILE THOMAS, DE BENGY, Xavier
Publication of US20200056616A1 publication Critical patent/US20200056616A1/en
Abandoned legal-status Critical Current

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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
    • F04D13/06—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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2277—Rotors specially for centrifugal pumps with special measures for increasing NPSH or dealing with liquids near boiling-point
    • 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
    • F04D13/0633—Details of the bearings
    • 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
    • F04D13/064—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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • 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
    • F04D29/046—Bearings
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/21—Manufacture essentially without removing material by casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/21—Manufacture essentially without removing material by casting
    • F05D2230/211—Manufacture essentially without removing material by casting by precision casting, e.g. microfusing or investment casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/53—Building or constructing in particular ways by integrally manufacturing a component, e.g. by milling from a billet or one piece construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/60—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds

Definitions

  • the present invention relates to a canned motor pump. More particularly, the invention relates to a method for manufacturing such a motor pump.
  • a canned motor pump comprises both a pump and a motor, arranged within a hermetically sealed housing.
  • the motor pump comprises a fluid inlet opening and outlet opening.
  • These motor pumps comprise a housing, an electric motor, a central shaft and a wheel.
  • the housing comprises a motor casing.
  • the electric motor comprises a stator and a rotor arranged within the motor casing.
  • the shaft, the rotor and the wheel form a rotary assembly.
  • the central shaft is supported by two main bearings.
  • the wheel is attached to the front end of the shaft situated outside the motor casing.
  • the shaft and the wheel are very distinct.
  • the sleeve formed at the central part of the wheel simply constitutes a part of this wheel, intended for the mounting thereof upon the shaft.
  • the sleeve does not guide the rotary assembly in rotation.
  • the sleeve of the wheel constitutes a means of attachment by binding the wheel onto the shaft, but cannot be regarded as constituting a part of the shaft, being incapable of guiding the shaft specifically in rotation. Furthermore, it is possible to change the wheel independently of the shaft.
  • the objective of the present invention is to propose an improved motor pump.
  • the purpose of the invention is a canned motor pump comprising: a housing including a body and a motor casing; an electric motor including a stator and a rotor arranged within the motor casing; a shaft which extends along a central axis, which is secured to the rotor in rotation about the central axis, and which has a front end located outside the motor casing, within the body of the housing; and a wheel which is located at the front end of the shaft, which is secured to the shaft in rotation about the central axis, and which has a hydraulic profile suitable for moving a fluid in the body.
  • the rotor, the shaft and the wheel form a rotary assembly. Within the rotary assembly, only the shaft is supported by one or more bearings, thereby guiding the rotary assembly in rotation.
  • the motor pump is characterized in that the shaft and the wheel constitute at least partially a unitary part.
  • the motor pump according to the invention offers many advantages.
  • the motor pump has absolute tightness, high reliability, and low maintenance.
  • the unitary part formed by the shaft and the wheel may be manufactured using various techniques, including additive fabrication of the part or the mold wherein this piece is molded.
  • This provides responsiveness and freedom for the design of geometric shapes in order to improve the efficiency of the motor pump.
  • a greater freedom of design is offered at the central part of the wheel.
  • This also makes it possible to improve the NPSH characterizing the suction performance of the motor pump.
  • the design is simplified in being more compact and with fewer components.
  • the large air gap makes it possible to consider new sealing solutions for the stator, improving the efficiency of the motor and therefore of the motor pump.
  • the motor pump according to the invention has great versatility.
  • This motor pump can be implemented within numerous, industrial or domestic applications in: agri-food, chemicals, pharmaceuticals, oil, phosphoric fertilizers, metallurgy, marine, boiler, desalination, evaporation, etc.
  • the subject of the invention is also a method for manufacturing a motor pump as described above.
  • the shaft and the wheel are at least partially manufactured as a unitary part, for example according to a technique of sand, metal mold or lost wax casting, sintering, welding, additive fabrication, or a combination of several techniques.
  • the method comprises an additive fabrication operation of the unitary part.
  • the method comprises an additive fabrication operation of at least a portion of a mold comprising a cavity corresponding to the unitary part, and then a fabrication operation for the unitary part within this mold.
  • the additive fabrication operation may consist of the manufacture of the mold in the entirety thereof, or only a part of this mold, in particular at the junction between the shaft and the wheel.
  • the shaft and the wheel are integrally manufactured as a unitary part.
  • the method may also include other operations within the scope of the invention.
  • the method may include machining operations, heat treatment, coating, etc.
  • FIG. 1 is a longitudinal sectional view of a motor pump according to the state of the art
  • FIG. 2 is a larger scale view of the detail II in FIG. 1 ;
  • FIG. 3 is a longitudinal sectional view similar to FIG. 1 , showing a motor pump according to a first embodiment of the invention
  • FIG. 4 is a larger scale view of the detail IV in FIG. 3 ;
  • FIG. 5 is a longitudinal sectional view analogous to FIG. 1 , showing a motor pump according to a second embodiment of the invention.
  • FIG. 6 is a longitudinal sectional view similar to FIG. 1 , showing a shaft variant designed to equip a motor pump according to the invention.
  • FIGS. 1 and 2 an example is shown of a canned centrifugal motor pump P 0 that is known from the state of the art.
  • the motor pump P 0 comprises a housing 1 , an electric motor 2 , a shaft 5 , a wheel 6 , a screw 7 and bearings 8 and 9 .
  • the electric motor 2 comprises a stator 3 and a rotor 4 centered on a central axis X 1 .
  • the rotor 4 is secured with the shaft 5 , itself secured with the wheel 6 .
  • the screw 7 makes it possible to secure the wheel 6 at the end of the shaft 5 .
  • the rotor 4 , the shaft 5 and the wheel 6 form a rotary assembly, rotatable about the central axis X 1 .
  • the housing 1 is partially shown with the aim of simplification.
  • the housing 1 includes a body 1 a partially represented by dotted lines, a motor casing 1 b and a cover 1 c .
  • the stator 3 and the rotor 4 are arranged within the motor casing 1 b .
  • the cover 1 c closes the motor casing 1 b at the rear bearing 9 .
  • the stator 3 comprises an electromagnetic core 3 a , a winding 3 b , a resin coating 3 c and a metal liner 3 d .
  • the winding 3 b extends on either side of the core 3 a according to the axis X 1 and is embedded within the coating 3 c .
  • the liner 3 d extends along the stator 3 , at the air gap formed with the rotor 4 , in order to ensure the sealing of the stator 3 .
  • the liner 3 d is in contact both with the core 3 a and the coating 3 c . This configuration is a source of losses due to eddy currents within the liner 3 d.
  • FIGS. 3 and 4 A canned centrifugal motor pump P 1 according to a first embodiment of the invention is shown in FIGS. 3 and 4 .
  • the motor pump P 1 comprises a housing 10 , an electric motor 20 comprising a stator 30 and a rotor 40 , a shaft 50 , a wheel 60 and a bearing 80 .
  • the electric motor 20 comprises a stator 30 and a rotor 40 centered on a central axis X 1 .
  • the rotor 40 is secured with the shaft 50 , itself secured with the wheel 60 , as detailed below.
  • the housing 10 includes a body 11 arranged on the front side and a motor casing 12 arranged on the rear side of the motor pump P 1 .
  • the body 11 is partially shown by a dotted line for the purpose of simplification.
  • the casing 12 comprises various walls 14 , 15 , 16 and 18 secured to one another.
  • the outer wall 14 has a cylindrical profile.
  • the front wall 15 has a flat annular shape, surrounding the wall 18 .
  • the rear wall 16 has a planar disc shape.
  • the front wall 18 has a cylindrical shape and constitutes a bearing support.
  • the stator 30 comprises an electromagnetic core 31 and a winding 32 , which extends on either side of the core 31 along the axis X 1 .
  • the core 31 and the winding 32 are embedded within a resin encapsulation 33 , thereby sealing the stator 3 .
  • the encapsulation 33 extends all along the stator 30 , at the air gap formed with the rotor 40 .
  • the stator 30 has no metallic liner. By virtue of the use of an encapsulation 33 in place of the metallic liner of the stator 30 , the eddy current losses are eliminated.
  • the shaft 50 and the wheel 60 constitute at least partly a unitary part 70 .
  • the part 70 comprises at least a portion of the shaft 50 and at least a portion of the wheel 60 .
  • One or more other portions of the shaft 50 and/or the wheel 60 may be formed by one or more different parts of the part 70 .
  • the shaft 50 and the wheel 60 entirely constitute a single unitary part 70 .
  • the part 70 embodies the entire shaft 50 and the wheel 60 . They are not formed by anything other than the part 70 .
  • the part 70 may be manufactured according to various techniques of sand, metal mold or lost wax casting, sintering, welding, additive fabrication of the part 70 , additive fabrication of the mold, or a combination of several techniques.
  • the part 70 can be manufactured entirely by means of additive fabrication.
  • the part 70 can be cast in a mold, itself obtained at least in part by means of additive fabrication.
  • the rotor 40 and the part 70 form a rotary assembly ER 1 , rotatable about the axis X 1 , within the motor pump P 1 .
  • the shaft 50 extends along the axis X 1 , with a main portion 51 connecting a front end 52 and a rear end 53 .
  • the rotor 40 is secured with the shaft 50 at the main portion 51 thereof, by any known means.
  • the main portion 51 and the rear end 53 are located within the motor casing 12 .
  • the front end 52 is located outside the motor casing 12 , within the body 11 of the casing 10 .
  • the wheel 60 comprises a central portion 61 , blades 62 , an inlet opening 63 , inner channels 64 and outlet openings 65 .
  • the wheel 60 is located outside the motor casing 12 , within the body 11 of the housing 10 .
  • the wheel 60 has a hydraulic profile suitable for moving a fluid F within the body 11 .
  • the motor pump P 1 is a centrifugal pump, that is to say the hydraulic profile of the wheel 60 is suitable for the transmission of energy by the centrifugation of fluid F within the motor pump P 1 .
  • the fluid F enters the opening 63 , then passes through the channels 64 arranged within the wheel 60 , to the outlet orifices 65 .
  • the central portion 61 is located on the axis X 1 and is secured with the front end 52 of the shaft 50 .
  • the central portion 61 can have no fastening system, for example of the screw type 7 , provided for in the state of the art. This offers greater design freedom near this central part 61 .
  • the central portion 61 has a concave shape, formed projecting from the front side, in such a way as to guide the fluid F entering the opening 63 and then the channels 64 .
  • the central portion 61 may be shaped as an inducer.
  • the central portion 61 may include an extension to the blades 62 of the wheel 60 .
  • the bearing 80 is located between the rotor 40 and the wheel 60 , along the axis X 1 .
  • the bearing 80 can therefore be described as a center bearing, in relation to the rotary assembly ER 1 .
  • the bearing 80 comprises the wall 18 and two members 81 and 82 , which are accommodated within the bore defined by the wall 18 .
  • the elements 81 and 82 are spaced slightly apart, and support the main portion 51 of the shaft 50 radially to the axis X 1 .
  • the elements 81 and 82 are, for example, plain bearings or rollers.
  • This design with a central bearing 80 is made possible by means of the use of a motor 20 with a relatively short length along the axis X 1 .
  • the rotor 40 may be cantilevered from the side of the rear end 53 of the shaft 50 .
  • This solution is allowed by the use of the technology of the synchronous motor with magnets on the rotor 40 .
  • Such a motor offers optimum performance over the entire speed range as well as reduced weight and bulk.
  • FIG. 5 a canned centrifugal motor pump P 2 according to a second embodiment of the invention is shown.
  • Some constituent elements of the motor pump P 2 are comparable to those of the motor pump P 1 described above and, for purposes of simplification, bear the same numerical references.
  • the motor pump P 2 comprises two bearings 8 and 9 arranged on either side of the rotor 40 .
  • the bearing 8 supports the main portion 51 of the shaft 50 between the rotor 40 and the wheel 60 , while the bearing 9 supports the rear end 53 of the shaft 50 .
  • Each bearing 8 and 9 comprises a single element, respectively 81 and 91 , supporting the shaft 50 .
  • the elements 81 and 91 may be plain bearings or rollers.
  • Each bearing 8 and 9 comprises a cylindrical wall, 18 and 19 respectively, of the housing 10 .
  • Each of the elements 81 and 91 is mounted within the bore defined by one of the walls 18 and 19 .
  • the housing 10 comprises a cover 13 for closing the casing 12 at the bearing 9 .
  • FIG. 6 shows a variant of the wheel 60 , designed to equip a pump P 1 or P 2 according to the invention.
  • the central portion 61 of the wheel 60 is shaped as an inducer, provided in order to improve the capacity for suction of the fluid F by the wheel 60 .
  • the central portion 61 includes an extension to the blades 62 of the wheel 60 , also making it possible to improve the capacity for suction of the fluid F by means of the wheel 60 .
  • the motor pump P 1 /P 2 can be configured differently from FIGS. 3 to 6 without going beyond the scope of the invention. Moreover, the technical characteristics of the various embodiments and variants mentioned above can, in whole or for some thereof, be combined with one another. Thus, the pump P 1 /P 2 may be adapted in terms of cost, functionality and performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US16/342,990 2016-10-19 2017-10-05 Canned motor pump and method for manufacturing such a motor pump Abandoned US20200056616A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1660150A FR3057626A1 (fr) 2016-10-19 2016-10-19 Motopompe a rotor noye, et procede de fabrication d'une telle motopompe
FR1660150 2016-10-19
PCT/FR2017/052741 WO2018073508A1 (fr) 2016-10-19 2017-10-05 Motopompe a rotor noye, et procede de fabrication d'une telle motopompe

Publications (1)

Publication Number Publication Date
US20200056616A1 true US20200056616A1 (en) 2020-02-20

Family

ID=57590665

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/342,990 Abandoned US20200056616A1 (en) 2016-10-19 2017-10-05 Canned motor pump and method for manufacturing such a motor pump

Country Status (6)

Country Link
US (1) US20200056616A1 (de)
EP (1) EP3529494A1 (de)
CN (1) CN110036205A (de)
FR (1) FR3057626A1 (de)
MA (1) MA46556A (de)
WO (1) WO2018073508A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022059709A1 (ja) * 2020-09-16 2022-03-24 三相電機株式会社 キャンドモータポンプ
JP7509899B2 (ja) 2020-09-16 2024-07-02 三相電機株式会社 キャンドモータポンプ

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10527216B2 (en) 2016-10-24 2020-01-07 Lorax Systems Inc. Fluid delivery line assembly with shut-off valve assembly
CN113958524A (zh) * 2021-09-18 2022-01-21 广东永丰智威电气有限公司 一种带照明灯具的内转子式电机工业大风扇

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CH292898A (fr) * 1951-08-13 1953-08-31 Charmilles Sa Ateliers Groupe moto-pompe hydraulique.
FR1527993A (fr) * 1967-04-21 1968-06-07 Pompe d'accélération, sans presse-étoupe, pour installations de chauffage central à eau chaude
US3522997A (en) * 1968-07-01 1970-08-04 Rylewski Eugeniusz Inducer
SE371858B (de) * 1971-11-11 1974-12-02 Skf Ind Trading & Dev
GB1461901A (en) * 1975-06-23 1977-01-19 Skf Uk Ltd Water pumps for internal combustion engines
KR100198399B1 (ko) * 1996-11-29 1999-06-15 전주범 온수순환펌프용 수중회전 로터구조
AT410827B (de) * 1997-02-14 2003-08-25 Andritz Ag Maschf Pumpenwelle
DE19946849B4 (de) 1999-09-30 2010-09-16 Ksb Ag Spaltrohrmotorpumpe
CN101113741B (zh) * 2006-07-26 2011-03-16 上海新沪电机厂有限公司 一种屏蔽泵轴向力的自动平衡装置
CN1958706A (zh) * 2006-10-16 2007-05-09 中山大学 交流永磁潜水电机塑封材料及其塑封工艺与应用
JP4531780B2 (ja) 2007-02-21 2010-08-25 株式会社荏原製作所 キャンドモータポンプにおけるポンプ取扱液の循環方法
CN201090458Y (zh) * 2007-09-25 2008-07-23 杰克陈 内置控制电路的无刷液体泵
EP2607709B1 (de) 2011-12-23 2015-12-23 Grundfos Holding A/S Elektromotor
CN105545797A (zh) * 2015-12-29 2016-05-04 西安航天动力研究所 高抗汽蚀性能一体化叶轮

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022059709A1 (ja) * 2020-09-16 2022-03-24 三相電機株式会社 キャンドモータポンプ
JP7509899B2 (ja) 2020-09-16 2024-07-02 三相電機株式会社 キャンドモータポンプ

Also Published As

Publication number Publication date
MA46556A (fr) 2019-08-28
EP3529494A1 (de) 2019-08-28
FR3057626A1 (fr) 2018-04-20
CN110036205A (zh) 2019-07-19
WO2018073508A1 (fr) 2018-04-26

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Owner name: SAINT JEAN INDUSTRIES, FRANCE

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