WO2013033975A1 - Moteur électrique utilisé pour pompe à fonctionnement de type humide et procédé d'assemblage de celui-ci - Google Patents

Moteur électrique utilisé pour pompe à fonctionnement de type humide et procédé d'assemblage de celui-ci Download PDF

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Publication number
WO2013033975A1
WO2013033975A1 PCT/CN2012/001244 CN2012001244W WO2013033975A1 WO 2013033975 A1 WO2013033975 A1 WO 2013033975A1 CN 2012001244 W CN2012001244 W CN 2012001244W WO 2013033975 A1 WO2013033975 A1 WO 2013033975A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
motor
sleeve
rotor
pole piece
Prior art date
Application number
PCT/CN2012/001244
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English (en)
Chinese (zh)
Inventor
张咏玉
傅小波
曾飞平
Original Assignee
常州亚通杰威电机有限公司
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Filing date
Publication date
Application filed by 常州亚通杰威电机有限公司 filed Critical 常州亚通杰威电机有限公司
Publication of WO2013033975A1 publication Critical patent/WO2013033975A1/fr

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Classifications

    • 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
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines

Definitions

  • the present invention relates to a motor for a pump, and more particularly to a motor for a wet running pump, and to a method of assembling a motor for a wet running pump. Background technique
  • the pump is a machine that transports or pressurizes the fluid. Its working principle is to transfer the mechanical energy generated by the pump motor or other external energy to the fluid to increase the energy of the fluid, mainly for transporting fluids including water, oil, acid and alkali, Emulsions, suspensions, liquid metals, etc.
  • the pump motor generally includes a dry running pump motor and a wet running pump motor.
  • the dry running pump motor means that the motor is integrally packaged, and one end of the rotating shaft protrudes from the integral package of the motor as the energy output end of the pump motor.
  • a sealing sleeve is disposed on the rotating shaft at the joint of the package and the protruding end of the rotating shaft, and a complicated and high-cost sealing structure is required in order to reliably seal the entire motor with respect to the conveying fluid for a long time.
  • the wet running pump motor removes the complicated sealing structure by adding a sleeve.
  • the sleeve is disposed between the stator and the rotor, and the rotor is located in the sleeve to contact the conveying fluid, and the sleeve seals the rotor space relative to the stator space, mainly preventing the conveying. Fluid infiltration does not allow contact with fluid, charged stator.
  • the wet running pump motor is simpler and less expensive than the dry running pump motor.
  • the air gap between the rotor and the stator of the motor for wet running pumps is increased by the provision of the bushing, the magnetic field between the rotor and the stator is weakened, resulting in a lower operating efficiency of the motor for the wet running pump than for the dry running pump.
  • Motor. The casing needs to maintain a certain wall thickness to ensure its strength. Therefore, under the premise of ensuring the strength of the casing, simply reducing the casing thickness and reducing the air gap between the rotor and the stator obviously cannot meet the operating efficiency of the actual wet running pump motor. Requirements.
  • the portion of the housing circumscribing the rotor includes a plurality of axially extending, circumferentially spaced strips of magnetic Material penetrating through plastic Each of the strips coincide with corresponding ones of the pole teeth of a motor stator circumscribing the outer portion of the housing such that the strips in the housing act as extensions of the pole teeth.
  • the strips of The strips are then placed in a mold in which the housing is formed by injecting plastic.
  • the plastic binder in the strips melds with the injected plastic to form a continuous
  • the ferromagnetic material strips extend through the housing and are spaced from the rotor surface by a normal air gap distance so as to improve the efficiency of the motor by having the magnetic strip act as extensions of the motor stator pole teeth
  • Patent No. US 5, 990, 588 the patent publication dated November 23, 1999
  • U.S. Patent entitled “Wet Operational Pumps for Wet Operational Pumps” discloses a wet running pump and motor assembly
  • the assembly includes a rotating shaft fixedly coupled to the rotor, the rotating shaft being coupled to an impeller located in the pump.
  • the rotor and the impeller are located in a conventional casing, and the rotor is immersible for rotation in any one of the fluids conveyed by the impeller.
  • the tube comprises a plurality of axially extending, circumferentially spaced magnetic strips made of a plastic material for preparing a sleeve made of a magnetic material, each magnetic strip being in a one-to-one correspondence with each of the stator pole pieces surrounding the outer sleeve, thereby forming a sleeve
  • the magnetic strip on the tube can correspond to the extension of the stator pole piece.
  • One of the specific embodiments may be as follows: The magnetic strip on the sleeve is mixed and molded by iron powder and a plastic binder, and then the magnetic strip is put into a mold for injection molding to obtain a sleeve, and the plastic binder and the injection in the magnetic strip are injected. The plastic is fused to form a one-piece sleeve for accommodating the rotor.
  • the ferromagnetic strip extends through the sleeve, and each of the spaced-apart ferromagnetic strips corresponds to the extension of the stator pole piece, and the distance between the rotor and the rotor is equivalent to the air gap of the conventional motor, that is, by providing the magnetic strip as the stator pole piece of the motor.
  • the extension ultimately achieves improved motor operating efficiency).
  • the structure reduces the air gap between the stator and the rotor to a certain extent, and improves the magnetic force between the stator and the rotor
  • the preparation process of the casing is complicated and costly, and at the same time, the casing is made of magnetic material. Magnetic strips made in the circumferential direction, when immersed in a relatively high temperature transport fluid for a long time, due to the temperature characteristics of the plastic material, it is prone to shrinkage caused by shrinkage, and there is a risk of fluid infiltration into the stator causing damage to the motor. . Summary of the invention
  • the technical problem to be solved by the present invention is to provide a motor for wet running pump and an assembly method, which can effectively reduce the air gap between the stator and the rotor under the premise of ensuring the strength of the casing, and improve the operating efficiency of the motor for the wet running pump. , and the manufacturing process is simple and the cost is low.
  • a motor for running a wet pump comprising a stator, a sleeve and a rotor integrated with the rotating shaft, one end of the rotating shaft is used as an energy output end of the motor, the sleeve is located between the stator and the rotor, the rotor is located in the sleeve, and the sleeve makes the rotor space Sealing relative to the stator space, wherein: the stator and the sleeve are integrated and seamlessly connected.
  • the rotating shaft of the present invention as the energy output end of the present invention is connected to the load, finally realizes the function of the wet running pump.
  • the sleeve is a plastic sleeve.
  • the stator comprises a stator core and a stator coil.
  • the inner circumference of the stator core integrally extends a plurality of stator teeth spaced apart from each other, and the stator teeth are provided with pole shoes at the ends, and stator slots are formed between adjacent stator teeth.
  • the stator coils are placed in the stator slots, and the pole shoes are integrally or partially embedded in the sleeves in a one-piece, seamless connection.
  • the stator In order to facilitate the stator weaving, reduce the labor required for the stator weaving, increase the slot filling rate of the stator, improve the utilization of the stator material, and at the same time, in order to facilitate the integrated and seamless connection of the stator and the sleeve, preferably, the stator includes a stator core, a stator coil, and a stator pole piece ring.
  • stator core integrally extends a plurality of stator teeth spaced apart from each other, and stator slots are formed between adjacent stator teeth, and the stator coil is embedded in the stator slot, and the stator pole piece ring is The outer circumference and the stator teeth are cooperatively connected to form a stator core with a closed slot, and the stator pole piece ring is integrally or partially embedded in the sleeve integrally and seamlessly connected in the inner circumferential direction.
  • the outer circumferential surface of the stator pole piece ring is provided with an outer groove corresponding to each stator tooth, and the stator tooth end portion is provided outside.
  • the groove fits the connected crotch.
  • the stator pole piece ring comprises a plurality of pole shoe units, and the pole shoe units are integrally connected by a connecting unit.
  • the circumferential surface of the connecting unit is smaller than The circumferential surface of the pole piece unit, and at the same time, because the circumferential surface of the connecting unit is smaller than the circumferential surface of the pole piece unit, the sleeve is injection molded on the stator pole piece ring of the structure, and the strength of the sleeve is also improved.
  • a plurality of grooves are formed on the inner peripheral surface of the stator pole piece ring.
  • a method for assembling a motor for a wet running pump wherein: an injection molding process is used to directly inject a sleeve on a stator, and then the rotor is placed in a sleeve to obtain a motor for a wet running pump.
  • the injection molding process of the present invention can be realized by using the existing injection molding technology, and the specific injection molding process will not be described herein.
  • the rotor combined with the rotating shaft according to the present invention may be a squirrel-cage rotor structure commonly known to those skilled in the art, including a rotor core.
  • the outer circumference of the rotor core may be spaced apart. Permanent magnet steel is fixed. It is of course also possible to use a rotor of an improved structure integrated with the shaft.
  • the sleeve is injection molded on the stator pole piece ring, and then the pole of the stator directly completing the winding process is completed.
  • stator core of the wire process is assembled by the stator teeth and the stator pole shoe.
  • the assembly of the outer peripheral surface completes the assembly.
  • the difficulty of the rule is more complicated. It is very easy.
  • the slot full rate is relatively low.
  • the second aspect of the present invention is a preferred embodiment of the present invention.
  • the invention adopts an injection molding method to prepare an integrated and seamlessly connected stator and sleeve assembly, and realizes the integration of the invention under the condition of using the same wall thickness and the same material sleeve.
  • the seamlessly coupled stator and bushing assembly greatly enhances the strength of the casing, i.e., the integrated, seamlessly coupled stator and casing assembly of the present invention greatly reduces casing under conditions that meet casing strength requirements.
  • the required wall thickness effectively reduces the air gap between the stator and the rotor, and improves the operating efficiency of the motor.
  • the invention effectively reduces the air gap between the stator and the rotor by using a simple injection molding process, and the preparation process is simple.
  • the utility model has the advantages of low cost and long service life. 3.
  • the invention adopts the stator core of the stator pole piece outer ring and the stator teeth to form a closed slot, and the stator pole piece ring is integrally and seamlessly connected integrally or partially along the inner circumferential direction.
  • the structure of the embedded sleeve facilitates the stator weaving, reduces the labor required for the stator weaving, improves the slot filling rate of the stator, and improves the utilization of the stator material;
  • the stator pole piece ring comprises a plurality of pole shoe units, and the pole shoe units are integrally connected by a connecting unit, and the circumferential surface of the connecting unit is smaller than the circumferential surface of the pole shoe unit, thereby effectively reducing the magnetic flux leakage coefficient, and the stator of the structure
  • the sleeve of the pole shoe is injection-molded to obtain the sleeve, and the strength of the sleeve is also improved. 5.
  • the inner peripheral surface of the stator pole piece ring of the present invention is further provided with a plurality of slots, and the sleeve is molded on the stator pole piece ring to further form a sleeve. Increased strength of the casing.
  • Embodiment 3 is a schematic structural view of Embodiment 3 of the present invention.
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • Figure 3 is a schematic enlarged view of the structure of Figure 2;
  • FIG. 4 is a schematic structural view of Embodiment 11 of the present invention.
  • Figure 5 is a cross-sectional view of BB of Figure 4;
  • Figure 6 is a schematic enlarged view of the structure of Figure 4;
  • FIG 7 is a schematic view showing the structure of the stator pole piece ring 14b of Figure 4.
  • stator 1 sleeve 2
  • rotor 3 shaft 4
  • stator core la stator coil 12a
  • stator teeth 13a stator teeth 13a
  • pole piece 14a stator slot 15a
  • stator core l lb stator coil 12b
  • Embodiment 1 A motor for a wet running pump, comprising a stator 1, a sleeve 2, and a rotor 3 integrated with a rotating shaft 4, one end of a rotating shaft 4 serving as an energy output end of the motor, and the sleeve 2 being located at the stator 1 and the rotor 3
  • the rotor 3 is located in the casing 2, and the casing 2 spatially seals the space of the rotor 3 with respect to the stator 1, wherein: the stator 1 and the casing 2 are of a one-piece, seamless connection structure.
  • Embodiment 2 A motor for a wet running pump, wherein: the sleeve 2 is a plastic sleeve, and the rest is the same as in the first embodiment.
  • Embodiment 3 A motor for a wet-running pump, wherein: the stator 1 includes a stator core 11a and a stator coil 12a.
  • the stator core 11a integrally extends a plurality of stator teeth 13a spaced apart from each other at an inner circumference, and the stator teeth 13a The end is provided with a pole piece 11 ⁇ 2, a stator slot 15a is formed between each adjacent stator tooth 13a, the stator coil 12a is placed in the stator slot 15a, and the pole piece 14a is integrally embedded into the sleeve 2 in a seamless manner, and the rest is the same embodiment. 1 or embodiment 2.
  • Embodiment 4 A motor for a wet running pump, wherein: the stator 1 includes a stator core l la and a stator coil 12a.
  • the stator core 11a integrally extends a plurality of stator teeth 13a spaced apart from each other at an inner circumference of the stator core 11a. 13a is provided with a pole piece 14a, a stator slot 15a is formed between each adjacent stator tooth 13a, a stator coil 12a is placed in the stator slot 15a, and a pole piece 14a is partially and seamlessly embedded in the sleeve 2, and the rest is implemented.
  • Example 3 The preparation methods of Example 3 and Example 4 are as follows:
  • stator iron chip is laminated into a stator core 11a;
  • stator coil 12a is embedded in the stator slot 15a formed by each adjacent stator tooth 13a of the stator core 11a obtained in the step (1);
  • stator core 11a obtained in the step (2) is placed in an injection mold, and injection molded on the pole piece 14a to obtain an integrated stator and sleeve assembly; (4) placing the rotor 3 in the step (3) to obtain the sleeve 2 of the stator and the casing assembly;
  • the preparation method of the rotor 3 of this embodiment is a conventional prior art, and the specific preparation method and process thereof are not described herein.
  • the step (4) can be directly carried out in the step (3), that is, the stator core 11a and the rotor 3 of the step (2) are placed in an injection mold for injection molding to obtain an integrated stator and sleeve assembly, the rotor 3 is located within the casing 2.
  • Embodiment 5 A motor for a wet running pump, wherein: the stator 1 includes a stator core 11b, a stator coil 12b, and a stator pole piece ring 14b.
  • the stator core lib has a plurality of stators extending at an inner circumference.
  • the stator 13b is formed between the adjacent stator teeth 13b, the stator coil 12b is embedded in the stator slot 15b, and the outer circumference of the stator pole piece ring 14b is coupled with the stator teeth 13b to form a stator core lib of the closed slot, the stator pole piece
  • the ring 14b is integrally fitted into the sleeve 2 in a one-piece, seamless connection in the inner circumferential direction, and the rest is the same as in the first embodiment or the second embodiment.
  • Embodiment 6 is a motor for a wet running pump, wherein: the stator 1 includes a stator core 11b, a stator coil 12b, and a stator pole piece ring 14b.
  • the stator core lib has a plurality of stators extending integrally at an inner circumference.
  • the stator 13b is formed between the adjacent stator teeth 13b, the stator coil 12b is embedded in the stator slot 15b, and the outer circumference of the stator pole piece ring 14b is coupled with the stator teeth 13b to form a stator core lib of the closed slot, the stator pole piece
  • the ring 14b is partially embedded in the sleeve 2 in a unitary, seamless connection in the inner circumferential direction, and the rest is the same as in the first embodiment or the second embodiment.
  • the preparation method of the rotor 3 of this embodiment is a conventional prior art, and the specific preparation method and process thereof are not described herein.
  • the step (6) can be directly carried out in the step (4), that is, the pole piece ring b and the rotor 3 obtained in the step (3) are placed in an injection mold for injection molding to obtain an integrated pole piece ring and sleeve.
  • the tube assembly, the rotor 3 is located within the sleeve 2.
  • Embodiment 7 A motor for a wet running pump, wherein: an outer groove 141 corresponding to each stator tooth 13b is disposed on an outer circumferential surface of the stator pole piece ring 14b, and an outer groove 141 is provided at an end of the stator tooth 13b.
  • the remaining portion 131 of the connection is the same as the embodiment 5 or the embodiment 6.
  • Embodiment 8 is a motor for a wet-running pump, wherein: the stator pole piece ring 14b includes a plurality of pole piece units 143, and each of the pole piece units 143 is integrally connected by a connecting unit 144, and the rest is the same as in Embodiment 5 Or Example 6 or Example 7.
  • Embodiment 9 A motor for a wet running pump, wherein: the circumferential surface of the connecting unit 144 is smaller than the circumferential surface of the pole piece unit 143, and the rest is the same as Embodiment 8.
  • Embodiment 10 A motor for a wet running pump, wherein: the stator pole piece ring 14b is further provided with a plurality of slots 142 on the inner circumferential surface thereof, and the rest is the same as Embodiment 5 or Embodiment 6 or Embodiment 7 or implemented.
  • Example 8 or Example 9 A motor for a wet running pump, wherein: the stator pole piece ring 14b is further provided with a plurality of slots 142 on the inner circumferential surface thereof, and the rest is the same as Embodiment 5 or Embodiment 6 or Embodiment 7 or implemented.
  • Example 8 or Example 9 A motor for a wet running pump, wherein: the stator pole piece ring 14b is further provided with a plurality of slots 142 on the inner circumferential surface thereof, and the rest is the same as Embodiment 5 or Embodiment 6 or Embodiment 7 or implemented.
  • Example 8 or Example 9 A motor for a wet running pump, wherein: the stator pole piece
  • Embodiment 11 is a motor for a wet running pump, wherein: the stator 1 includes a stator core 11b, a stator coil 12b, and a stator pole piece ring 14b.
  • the stator core lib has an inner circumference extending integrally with 9 stators spaced apart.
  • the teeth 13b are formed with nine stator slots 15b between the adjacent stator teeth 13b, the stator coils 12b are embedded in the stator slots 15b, and the outer periphery of the stator pole piece rings 14b is coupled with the stator teeth 13b to form a stator core 11b having a closed slot.
  • the pole piece ring 14b is partially and seamlessly coupled to the sleeve 2 in the inner circumferential direction.
  • the outer peripheral surface of the stator pole piece ring 14b is provided with an outer groove 141 corresponding to each stator tooth 13b, and the stator teeth 13b end.
  • the portion of the stator pole piece 14b includes nine pole piece units 143, and the pole piece units 143 are integrally connected by a connecting unit 144.
  • the connecting unit is connected.
  • the circumferential surface of the 144 is smaller than the circumferential surface of the pole piece unit 143, and the inner circumferential surface of the stator pole piece 14b is further provided with 18 slots 142, and the rest is the same as Embodiment 6 or Embodiment 7 or Embodiment 8 or the embodiment. 9 or Example 10.
  • the preparation method of the embodiment 5 or the embodiment 6 or the embodiment 7 or the embodiment 8 or the embodiment 9 or the embodiment 10 is as follows:
  • stator coil 12b is embedded in the stator slot 15b formed by each adjacent stator tooth 13b by the stator core lib obtained in the step (1);
  • stator pole piece ring piece is laminated into a stator pole piece ring 14b;
  • stator pole piece ring 14b obtained in the step (3) is placed in an injection mold for injection molding to obtain an integrated stator pole piece ring and a bushing assembly;
  • stator core lib of the stator coil 12b obtained in the step (2) is mated with the integral stator pole piece ring and the sleeve assembly obtained in the step (4);
  • Embodiment 12 A method for assembling a motor for a wet running pump, wherein: the casing 2 is directly injection molded on the stator 1 by an injection molding process, and then the rotor 3 is placed in the casing 2 to obtain a motor for a wet running pump, and the rest are the same Any of the embodiments 1-11.
  • Embodiment 13 is a method for assembling a motor for a wet running pump, wherein: the casing 2 is directly injection molded on the stator 1 and the outer periphery of the rotor 3 by an injection molding process to obtain a motor for a wet running pump, and the rest are the same as those in the embodiments 1 - 11 Any of the embodiments.
  • the invention is not limited to the specific embodiments described above, but it also has many variations or modifications, such as the shape of the sleeve, variations in the shape or number of stator teeth, variations in the shape or number of slots or outer grooves, or in the motor. It is within the scope of the present invention to provide an outer casing to further protect the motor body from the spirit and scope of the present invention.

Abstract

L'invention concerne un moteur électrique utilisé pour une pompe à fonctionnement de type humide qui comprend un stator (1), un tube-enveloppe (2), un arbre rotatif (4) et un rotor (3) intégré avec l'arbre rotatif (4). Une extrémité de l'arbre rotatif (4) est utilisée comme extrémité de sortie de puissance du moteur électrique, le tube-enveloppe (2) est positionné entre le stator (1) et le rotor (3). Le rotor (3) est positionné dans le tube-enveloppe (2), et le tube-enveloppe (2) fait que l'espace du rotor (3) est étanche par rapport à l'espace du stator (1). Le stator (1) et le tube-enveloppe (2) constituent une structure de connexion continue intégrée. Dans le procédé d'assemblage du moteur électrique utilisé pour la pompe à fonctionnement de type humide, le tube-enveloppe (2) est moulé par injection directement sur le stator (1) au moyen d'un processus de moulage par injection, à la suite de quoi le rotor (3) est agencé dans le tube-enveloppe (2). Dans le moteur électrique, un espace d'air entre le stator et le rotor est réduit efficacement dans le but de garantir la résistance du tube-enveloppe. L'efficacité de fonctionnement du moteur électrique utilisé pour la pompe à fonctionnement de type humide est améliorée, son procédé de fabrication est simple et son coût est faible.
PCT/CN2012/001244 2011-09-09 2012-09-06 Moteur électrique utilisé pour pompe à fonctionnement de type humide et procédé d'assemblage de celui-ci WO2013033975A1 (fr)

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CN201110267300.2 2011-09-09
CN2011102673002A CN102355069B (zh) 2011-09-09 2011-09-09 一种湿式运行泵用电机以及装配方法

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WO2018204104A1 (fr) 2017-05-02 2018-11-08 Moog Inc. Moteur électrique à utiliser dans un environnement de fluide sous pression

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CN102355069B (zh) * 2011-09-09 2013-10-02 常州新亚电机有限公司 一种湿式运行泵用电机以及装配方法
CN102723793A (zh) * 2012-06-20 2012-10-10 常州新亚电机有限公司 一种组合式的湿式运行泵用电机定子组件与套管及其装配方法
KR101365192B1 (ko) * 2013-07-26 2014-02-19 주식회사 디알액시온 세로방향 요철부를 구비하는 모터하우징 중자 제조금형 및 이에 의해 제조된 세로방향 요철부를 구비하는 모터하우징
CN104979925A (zh) * 2014-04-11 2015-10-14 博西华电器（江苏）有限公司 电机及具有该电机的家用电器
CN105099009A (zh) * 2014-04-24 2015-11-25 博西华电器（江苏）有限公司 电机及具有该电机的家用电器

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WO2018204104A1 (fr) 2017-05-02 2018-11-08 Moog Inc. Moteur électrique à utiliser dans un environnement de fluide sous pression
EP3619794A4 (fr) * 2017-05-02 2021-01-13 Moog Inc. Moteur électrique à utiliser dans un environnement de fluide sous pression
US11349368B2 (en) 2017-05-02 2022-05-31 Moog Inc. Electric motor for use in pressurized fluid environment

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