WO2022110378A1 - 定子、电机及水泵 - Google Patents

定子、电机及水泵 Download PDF

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Publication number
WO2022110378A1
WO2022110378A1 PCT/CN2020/137124 CN2020137124W WO2022110378A1 WO 2022110378 A1 WO2022110378 A1 WO 2022110378A1 CN 2020137124 W CN2020137124 W CN 2020137124W WO 2022110378 A1 WO2022110378 A1 WO 2022110378A1
Authority
WO
WIPO (PCT)
Prior art keywords
silicon steel
branch
steel sheet
stator
iron core
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.)
Ceased
Application number
PCT/CN2020/137124
Other languages
English (en)
French (fr)
Inventor
张奇
许德涛
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.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Microtech Changzhou Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Microtech Changzhou Co Ltd
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 AAC Acoustic Technologies Shenzhen Co Ltd, AAC Microtech Changzhou Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022110378A1 publication Critical patent/WO2022110378A1/zh
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • 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
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • 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

Definitions

  • the present application relates to the technical field of motors, and in particular, to a stator, a motor and a water pump.
  • the stator is an indispensable component in the motor, which directly affects the life, efficiency and other key attributes of the motor.
  • the stator includes an iron core and windings.
  • the iron core is formed by stacking multiple layers of silicon steel sheets.
  • the windings are formed by winding coils around the silicon steel sheets.
  • the structure of the silicon steel sheets determines the number of turns of the coil winding. In the existing micro motors, currently affected by the size of the motor, the structure of the silicon steel sheet is limited, and it is difficult to arrange more coils in a limited space.
  • the stator of the existing water pump is difficult to arrange more coils in a limited space due to the limitation of the silicon steel sheet structure.
  • the purpose of the present application is to provide a stator and a water pump, which can solve the problem of limited arrangement of coils in the windings of the stator.
  • One of the purposes of the embodiments of the present application is to provide a stator, which includes an iron core and a winding, the winding is wound outside the iron core, and the iron core includes a plurality of stacked Silicon steel sheet;
  • the silicon steel sheet is provided with a plurality of over-cuts, and the over-cuts on the silicon steel sheet are correspondingly arranged along the stacking direction of the plurality of silicon steel sheets to form over-cut grooves, and both ends of the winding are connected to the over-cut Slot abutment.
  • the silicon steel sheet includes a central portion and a plurality of branch portions, the plurality of branch portions are connected to the central portion, and the plurality of the branch portions are spaced around the center of the central portion Evenly distributed; the windings are wound outside the branch portion, and the connection position between the branch portion and the central portion is provided with a first over-notch.
  • the branch portion includes a first branch extending in the radial direction of the central portion and a second branch extending in the circumferential direction of the central portion; the first branch and the The connecting position of the second branch is provided with a second over-cut, and the second over-cut is located on the side of the second branch facing the center of the silicon steel sheet.
  • the second branch is vertically connected to the first branch, and a welding port is provided at the connection position of the first branch and the second branch, and the welding port is located at the A side of the second branch away from the center of the silicon steel sheet.
  • the plurality of silicon steel sheets include a first silicon steel sheet, and the first silicon steel sheet includes an opposite first side and a second side, and two adjacent first silicon steel sheets are among The first surface of one is in contact with the second surface of the other; the first surface is provided with a convex part, and the second surface is provided with a concave part that is riveted and matched with the convex part; the thickness of the convex part not greater than the thickness of the silicon steel sheet.
  • both the concave portion and the convex portion are provided on the first branch.
  • the number of the first branches is a multiple of the number of the recesses.
  • the plurality of silicon steel sheets include a second silicon steel sheet, and the second silicon steel sheet is provided with a through hole adapted to the convex portion; the second silicon steel sheet and the The first surface of the outermost first silicon steel sheet in the iron core is in contact with the first surface, and the second surface of the outermost first silicon steel sheet in the iron core is in contact with the first surface of the adjacent first silicon steel sheet.
  • the second purpose of the embodiments of the present application is to provide a motor, including:
  • a rotor is provided on the outer peripheral side of the stator, and the stator is used to drive the rotor to rotate.
  • the third purpose of the embodiments of the present application is to provide a water pump, including a pump body and the aforementioned motor, wherein the pump body has an inner cavity, a liquid inlet communicating with the inner cavity, and a liquid outlet communicating with the inner cavity,
  • the motor is installed on the pump body to drive the liquid to enter the inner cavity from the liquid inlet and discharge from the liquid outlet;
  • the motor includes an impeller, the impeller is arranged in the inner cavity, the pump body is provided with a rotating shaft, the impeller is rotatably connected with the rotating shaft, the rotor is installed on the impeller, and the stator is installed on the rotating shaft. the pump body.
  • an over-cut slot is provided at the connection position between the two ends of the winding and the iron core, so that the winding and the iron core area covered by the winding are extended on the premise that the overall shape of the iron core remains unchanged. length, which enhances the performance of the stator.
  • FIG. 1 is a schematic structural diagram of a stator according to an embodiment of the present application.
  • Fig. 2 is the exploded schematic diagram of the stator in Fig. 1;
  • Fig. 3 is the structural representation of the iron core in Fig. 1;
  • Fig. 4 is the exploded schematic diagram of the iron core in Fig. 3;
  • Fig. 5 is the structural representation of the first silicon steel sheet in Fig. 4;
  • FIG. 6 is a schematic structural diagram of another angle of the first silicon steel sheet in FIG. 4;
  • Fig. 7 is the structural representation of the second silicon steel sheet in Fig. 4.
  • FIG. 8 is a schematic structural diagram of a water pump according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of an exploded structure of the water pump in FIG. 8 .
  • the figure shows:
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features delimited with “first”, “second” may expressly or implicitly include one or more of said features. In the description of the present application, “plurality” means two or more, unless otherwise expressly and specifically defined.
  • a first aspect of the embodiment of the present application provides a stator 10 .
  • the stator 10 includes an iron core 100 and windings 200 , and the windings 200 are wound outside the iron core 100 .
  • the iron core 100 includes a plurality of stacked silicon steel sheets 110 .
  • the silicon steel sheet 110 is provided with a plurality of over-cuts 117, and the over-cuts 117 on the multiple silicon steel sheets 110 are correspondingly arranged along the stacking direction of the plurality of silicon steel sheets 110 to form over-cut slots 103, and both ends of the winding 200 are connected to the over-cut slots 103. 103 butt.
  • the contours of the multiple silicon steel sheets 110 are the same. After the multiple silicon steel sheets 110 are stacked and combined to form the iron core 100 , the over-cuts 117 of the multiple silicon steel sheets 110 in the same orientation are also stacked, and the multiple silicon steel sheets 110 across the same orientation are also stacked. The contours of the cutouts 117 are also the same, the overcuts 117 are correspondingly arranged along the stacking direction, and the overcuts 117 are continuously combined to form the overcut grooves 103 in the iron core 100 .
  • the over-cuts 103 are provided at the connection positions of the two ends of the winding 200 at the iron core 100 , so that the winding 200 and the iron core 100 covered by the winding 200 are extended on the premise that the overall shape of the iron core 100 remains unchanged.
  • the length of the area enhances the performance of the stator 10 .
  • the silicon steel sheet 110 includes a central portion 112 and a plurality of branch portions 111 , the plurality of branch portions 111 are connected to the central portion 112 , and the plurality of branch portions 111 surround the central portion The centers of the 112 are evenly spaced, and the same number of windings 200 in the branch portion 111 are wound outside the branch portion 111 . It can be understood that, in order to meet the performance requirements of the stator 10, the silicon steel sheet 110 needs to be provided with a plurality of branch portions 111, such as 4, 6, 8, or 9 branches.
  • a first over-notch 117 a is provided at the connection position of the branch portion 111 and the central portion 112 .
  • the first over-cuts 117a on the plurality of silicon steel sheets 110 are correspondingly disposed along the stacking direction of the plurality of silicon steel sheets 110 to form first over-cut grooves 103a.
  • the branch portion 111 includes a first branch 1111 extending radially along the central portion 112 and a second branch 1112 extending in a direction perpendicular to the first branch 1111 .
  • the contour of the side of the second branch 1112 away from the branch portion 111 is an arc, and the center of the arc coincides with the center of the center portion 112 , so that the overall shape of the silicon steel sheet 110 is circular, which is convenient for the installation of the iron core 100 . ,combination.
  • a second through-cut 117b is provided at the connection position between the first branch 1111 and the second branch 1112 , and the second through-cut 117b is located on the second branch 1112 facing the silicon steel sheet 110 on one side of the center.
  • the second overcuts 117b on the plurality of silicon steel sheets 110 are correspondingly disposed along the stacking direction of the plurality of silicon steel sheets 110 to form second overcut grooves 103b.
  • the material between the branch portions 111 , between the branch portions 111 and the central portion 112 , and inside the central portion 112 is generally removed by stamping to form the outline of the silicon steel sheet 110 .
  • the first over-cut 117a is provided at the connection position between the branch portion 111 and the central portion 112
  • the second over-cut 117b is provided at the connection position between the first branch 1111 and the second branch 1112, so that the silicon steel sheet can be cut during the processing of the punching tool.
  • 110 is excessively cut, and a relief groove is formed at the over-cut 117 of the silicon steel sheet 110 to improve the service life of the stamping tool.
  • a welding port 116 is provided at the connection position of the first branch 1111 and the second branch 1112 , and the welding port 116 is located at a part of the second branch 1112 away from the center of the silicon steel sheet 110 . side.
  • the first branch 1111 is connected to one side of the middle position of the second branch 1112
  • the welding port 116 is provided on the other side of the middle position of the second branch 1112 .
  • the welding ports 116 on the plurality of silicon steel sheets 110 are correspondingly disposed along the stacking direction of the plurality of silicon steel sheets 110 to form welding grooves 101 , and the plurality of silicon steel sheets 110 are fixedly connected by welding points 1120 located in the welding groove 101 .
  • the welding port 116 is set at the connection position of the second branch 1112 and the first branch 1111, and the welding port 116 is supported by the first branch 1111 and the second branch 1112 at the same time, which can effectively ensure the strength of the welding port 116.
  • the stability of the branch portion 111 is ensured during and after welding.
  • connection between the first branch 1111 and the second branch 1112 can effectively limit the extension length of the second branch 1112 and prevent one end of the second branch 1112 from being too far away from the first branch 1111. Deformation, warping, etc. during processing.
  • the iron core 100 includes a first silicon steel sheet 110a, the first silicon steel sheet 110a includes an opposite first surface and a second surface, and two adjacent first silicon steel sheets The first surface of one of the 110a abuts the second surface of the other.
  • the first surface is provided with a convex portion 113
  • the second surface is provided with a concave portion 114 that is riveted to the convex portion 113 . It can be understood that, by applying a pressing force to the first surface and the second surface of the first silicon steel sheet 110a, the first silicon steel sheet 110a is fixed in the form of riveting fit.
  • the thickness of the convex portion 113 is not greater than the thickness of the silicon steel sheet 110 , so as to avoid a gap between the adjacent first silicon steel sheets 110 a and affect the performance of the stator 10 .
  • both the concave portion 114 and the convex portion 113 are disposed on the first branch 1111 . It can be understood that the concave portion 114 and the convex portion 113 can also be arranged in other positions, such as the second branch 1112 or the central portion 112, etc., which are not limited in this application, and can ensure the connection strength of the two adjacent first silicon steel sheets 110a after stacking. That's it.
  • the number of the first branches 1111 is a multiple of the number of the recesses 114 .
  • the convex parts 113 and the concave parts 114 need to be evenly spaced to ensure the stability of the first silicon steel sheet 110a by pressing and riveting, and the number of the first branches 1111 is evenly spaced, so that the number of the first branches 1111 is a multiple of the number of the concave parts 114 , such as double, double, or triple.
  • the number of the first branches 1111 in the first silicon steel sheet 110a is 9, the number of the convex parts 113 and the concave parts 114 are both 3, and the number of the first branches 1111 is 3 times the number of the concave parts 114;
  • the number of the first branches 1111 in the silicon steel sheet 110 a is 8, the number of the convex parts 113 and the number of the concave parts 114 are both 4, and the number of the first branches 1111 is twice the number of the concave parts 114 .
  • the iron core 100 includes a second silicon steel sheet 110 b , and the second silicon steel sheet 110 b is provided with a through hole 115 adapted to the convex portion 113 .
  • the surface of the iron core 100 needs to be flat and smooth, so the convex part 113 of the outermost first silicon steel sheet 110a among the plurality of stacked first silicon steel sheets 110a needs to be covered and shielded, so that the second silicon steel sheet 110a needs to be covered.
  • the sheet 110b is in contact with the first surface of the outermost first silicon steel sheet 110a in the iron core 100, and the second surface of the outermost first silicon steel sheet 110a in the iron core 100 and the first surface of the adjacent first silicon steel sheet 110a In contact, the convex portion 113 of the outermost first silicon steel sheet 110 a is located in the through hole 115 , so that the surface of the iron core 100 of the finally formed stator 10 has no convex.
  • the iron core 100 includes a positioning groove 102 , and the positioning groove 102 is arranged on the inner side of the iron core 100 to prevent the silicon steel sheet 110 from being dislocated during the assembly process. phenomenon, the assembly efficiency of the iron core 100 is improved.
  • a second aspect of the present application provides a motor 1000 , including the aforementioned stator 10 and a rotor 20 disposed on the outer periphery of the stator 10 .
  • the stator 10 is used to drive the rotor 20 to rotate.
  • a third aspect of the present application provides a water pump 1 , including a pump body 2000 and the aforementioned motor 1000 .
  • the pump body 2000 has an inner cavity 2001, a liquid inlet 2002 communicating with the inner cavity 2001, and a liquid outlet 2003 communicating with the inner cavity 2001.
  • the motor 1000 is installed on the pump body 2000 to drive the liquid from the liquid inlet 2002 into the inner cavity 2001 and out of the inner cavity 2001.
  • the liquid outlet 2003 discharges.
  • the motor 1000 includes an impeller 30 , the impeller 30 is arranged in the inner cavity 2001 , the impeller 30 is rotatably connected with the pump body 2000 , the rotor 20 is mounted on the impeller 30 , and the stator 10 is mounted on the pump body 2000 .
  • the pump body 2000 includes a base 220 , an upper cover 210 and a sealing ring 230 , the upper cover 210 is provided with an annular groove 2005 surrounding the inner cavity 2001 , and the sealing ring 230 is sandwiched between the base 220 and the upper cover 210 and partially embedded in inside the annular groove 2005.
  • the stator 10 is supplied with alternating current.
  • the stator 10 generates a rotating magnetic field
  • the rotor 20 rotates under the action of ampere force in the rotating magnetic field
  • the rotating rotor 20 drives the impeller 30 to rotate.
  • the liquid enters the inner cavity 2001 from the liquid inlet 2002, rotates at a high speed and performs centrifugal motion under the impeller 30, and when the liquid reaches the liquid outlet 2003, it is thrown out from the liquid outlet 2003.
  • the pressure decreases, which is much lower than the atmospheric pressure, and the external fluid is replenished into the inner cavity 2001 from the liquid inlet 2002 under the action of the atmospheric pressure, and the above-mentioned actions are repeated to realize the transportation of the liquid.
  • stator 10 and the rotor 20 interact with each other through electromagnetic force, no direct connection is required, so there is no need to open a mounting hole communicating with the inner cavity 2001, which can prevent the fluid in the inner cavity 2001 from leaking through the mounting hole.
  • the side of the base 220 facing away from the upper cover 210 is provided with an installation groove 2004 , and the stator 10 is embedded in the installation groove 2004 .
  • the stator 10 does not increase the overall thickness of the pump body 2000, so that the size of the pump body 2000 is small.
  • the water pump 1 further includes a circuit board 3000 mounted on the base 220 , and the circuit board 3000 is electrically connected to the stator 10 through a cable 4000 .
  • the side of the base 220 facing away from the upper cover 210 is provided with an accommodating groove 2006 , and the circuit board 3000 is embedded in the accommodating groove 2006 .
  • the circuit board 3000 is accommodated in the accommodating groove 2006 and is not exposed, which can prevent the components on the circuit board 3000 from being knocked and damaged in the subsequent installation process.
  • the circuit board 3000 is accommodated in the accommodating groove 2006 , the circuit board 3000 will not increase the overall thickness of the pump body 2000, so that the size of the pump body 2000 is small.
  • the base 220 may not be provided with the accommodating groove 2006 , and the circuit board 3000 is directly mounted on the outer surface of the base 220 .
  • the side of the base 220 facing away from the upper cover 210 is provided with a wiring slot 2007 .
  • the wiring slot 2007 communicates with the installation slot 2004 and the accommodating slot 2006 .
  • the cable 4000 is routed in the cable trough 2007 and is not exposed, which can prevent the cable 4000 from being pulled by external forces and breakage.
  • the cable 4000 is routed in the cable trough 2007, and the cable 4000 will not increase the number of pumps.
  • the overall thickness of the body 2000 makes the size of the pump body 2000 small.
  • the base 220 may not be provided with the wiring groove 2007 , and the cables 4000 are directly routed on the outer surface of the base 220 .
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connected, or integrally connected. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connected, or integrally connected. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements.
  • a first feature "on” or “under” a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature is directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

一种定子（10），包括铁芯（100）和绕组（200），绕组（200）绕设在铁芯（100）外，铁芯（100）包括多个层叠的硅钢片（110）。其中，硅钢片（110）上设有多个过切口（117），多个硅钢片（110）上的过切口（117）沿多个硅钢片（110）的层叠方向对应设置形成过切槽（103），绕组（200）的两端均与过切槽（103）抵接。在绕组（200）的两端与铁芯（100）的连接位置设置过切槽（103），使得在铁芯（100）整体形状不变的前提下，延长了绕组（200）及绕组（200）覆盖的铁芯（100）区域的长度，增强了定子（10）的性能。

Description

定子、电机及水泵 技术领域
本申请涉及电机技术领域，特别涉及一种定子、电机及水泵。
 背景技术
定子是电机中必不可少的部件，直接影响电机的寿命、效率等关键属性。
定子包括铁芯和绕组，铁芯由多层硅钢片叠合而成，绕组由线圈绕设在硅钢片外形成，硅钢片的结构决定了线圈缠绕的匝数。现有的微型电机中，目前受到电机大小的影响，硅钢片结构受到限制，很难在有限的空间内布置更多的线圈。
因此，有必要提供一种新型的定子来解决上述问题。
 技术问题
现有水泵的定子由于硅钢片结构限制，很难在有限的空间内布置更多的线圈。
 技术解决方案
本申请的目的在于提供一种定子及水泵，能够解决定子的绕组中线圈布置受限的问题。
本申请的目的采用如下技术方案实现：本申请实施例目的之一在于提供一种定子，包括铁芯和绕组，所述绕组绕设在所述铁芯外，所述铁芯包括多个层叠的硅钢片；
其中，所述硅钢片上设有多个过切口，多个所述硅钢片上的过切口沿多个所述硅钢片层叠方向对应设置形成过切槽，所述绕组的两端均与所述过切槽抵接。
在本申请实施例提供的定子中，所述硅钢片包括中心部和多个分支部，多个所述分支部与所述中心部连接，多个所述分支部绕所述中心部的中心间隔均布; 所述绕组绕设在所述分支部外，所述分支部与所述中心部的连接位置设有第一过切口。
在本申请实施例提供的定子中，所述分支部包括沿所述中心部径向延伸的第一分支和沿所述中心部的周向延伸的第二分支;所述第一分支与所述第二分支的连接位置设有第二过切口，所述第二过切口位于所述第二分支朝向所述硅钢片中心的一侧。
在本申请实施例提供的定子中，所述第二分支与所述第一分支垂直连接，且所述第一分支与所述第二分支的连接位置设有焊接口，所述焊接口位于所述第二分支背离所述硅钢片中心的一侧。
在本申请实施例提供的定子中，所述多个硅钢片包括第一硅钢片，所述第一硅钢片包括相对的第一面和第二面，相邻两个所述第一硅钢片其中一个的第一面与另外一个的第二面抵接；所述第一面上设有凸部，所述第二面上设有与所述凸部铆接配合的凹部；所述凸部的厚度不大于所述硅钢片的厚度。
在本申请实施例提供的定子中，所述凹部和所述凸部均设置在所述第一分支上。
在本申请实施例提供的定子中，所述第一分支的数量为所述凹部的数量的倍数。
在本申请实施例提供的定子中，所述多个硅钢片包括第二硅钢片，所述第二硅钢片上设有与所凸部相适配的通孔；所述第二硅钢片与所述铁芯中最外侧的第一硅钢片的第一面抵接，所述铁芯中最外侧的第一硅钢片的第二面与相邻第一硅钢片的第一面抵接。
本申请实施例目的之二在于提供一种电机，包括：
如前述的定子；
转子，设置在所述定子外周侧，所述定子用于驱动所述转子转动。
本申请实施例目的之三在于提供一种水泵，包括泵体和如前述的电机，所述泵体具有内腔、连通所述内腔的进液口及连通所述内腔的出液口，所述电机安装于所述泵体上以驱动液体从所述进液口进入所述内腔并从所述出液口排出；
所述电机包括叶轮，所述叶轮设于所述内腔内，所述泵体设有转轴，所述叶轮与所述转轴转动连接，所述转子安装于所述叶轮，所述定子安装于所述泵体。
 有益效果
本申请实施方式相对于现有技术而言，在绕组的两端与铁芯的连接位置设置过切槽，使得在铁芯整体形状不变的前提下，延长了绕组及绕组覆盖的铁芯区域的长度，增强了定子的性能。
 附图说明
图1为本申请实施例提供的一种定子的结构示意图；
图2为图1中定子的分解示意图；
图3为图1中铁芯的结构示意图；
图4为图3中铁芯的分解示意图；
图5为图4中第一硅钢片的结构示意图；
图6为图4中第一硅钢片另一角度的结构示意图；
图7为图4中第二硅钢片的结构示意图；
图8为本申请实施例提供的一种水泵的结构示意图；
图9为图8中水泵的分解结构示意图。
图中示出：
1、水泵；
1000、电机；
10、定子；
100、铁芯；110、硅钢片；110a、第一硅钢片；110b、第二硅钢片；111、分支部；1111、第一分支；1112、第二分支；112、中心部；113、凸部；114、凹部；115、通孔；116、焊接口；117、过切口；117a、第一过切口；117b、第二过切口；1120、焊点；101、焊接槽；102、定位槽；103、过切槽；103a、第一过切槽；103b、第二过切槽；
200、绕组；
20、转子；30、叶轮；
2000、泵体；210、上盖；220、底座；230、密封圈；2001、内腔；2002、进液口；2003、出液口；2004、安装槽；2005、环形槽；2006、容纳槽；2007、走线槽；
3000、电路板；4000、线缆。
 本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所述的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
下面结合附图，对本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施例及实施例中的特征可以相互组合。
请参阅图1至图4，本申请实施例第一方面提供了一种定子10，定子10包括铁芯100和绕组200，绕组200绕设在铁芯100外。铁芯100包括多个层叠的硅钢片110。其中，硅钢片110上设有多个过切口117，多个硅钢片110上的过切口117沿多个硅钢片110层叠方向对应设置形成过切槽103，绕组200的两端均与过切槽103抵接。
具体地，多个硅钢片110的轮廓相同，多个硅钢片110层叠组合形成铁芯100后，多个硅钢片110同一方位的过切口117也进行层叠，且多个硅钢片110同一方位的过切口117的轮廓也相同，过切口117沿层叠方向对应设置，且过切口117连续组合以形成铁芯100中的过切槽103。
通过采用以上技术方案，在绕组200的两端于铁芯100的连接位置设置过切槽103，使得在铁芯100整体形状不变的前提下，延长了绕组200及绕组200覆盖的铁芯100区域的长度，增强了定子10的性能。
可以理解的是，在定子10的铁芯100形状不变的前提下，绕组200中线圈的匝数越多，定子10运行时绕组200中的磁通量变化越大，定子10的性能越强。
请参阅图3和图4，在一可选的实施方式中，硅钢片110包括中心部112和多个分支部111，多个分支部111与中心部112连接，多个分支部111绕中心部112的中心间隔均布，且于分支部111数量相同的绕组200绕设在分支部111外。可以理解的是，为了满足定子10的性能需要，硅钢片110需要设置多个分支部111，如4个、6个、8个或9个等。
请参阅图4至图7，在一可选的实施例中，分支部111与中心部112的连接位置设有第一过切口117a。多个硅钢片110上第一过切口117a沿多个硅钢片110层叠方向对应设置形成第一过切槽103a。
请参阅图3和图4，在一可选的实施方式中，分支部111包括沿中心部112径向延伸的第一分支1111和沿垂直第一分支1111方向延伸的第二分支1112。示例性地，第二分支1112远离分支部111的一侧的轮廓为弧形，弧形的圆心与中心部112的圆心重合，使得硅钢片110的整体外形呈圆形，便于铁芯100的安装、组合。
请参阅图4至图7，在一可选的实施例中，第一分支1111述第二分支1112的连接位置设有第二过切口117b，第二过切口117b位于第二分支1112朝向硅钢片110中心的一侧。多个硅钢片110上的第二过切口117b沿多个硅钢片110层叠方向对应设置形成第二过切槽103b。
可以理解的是，在加工硅钢片110的过程中，一般采用冲压的形式去除分支部111之间、分支部111与中心部112之间及中心部112内部的材料，形成硅钢片110的轮廓。通过在分支部111与中心部112的连接位置设有第一过切口117a，第一分支1111述第二分支1112的连接位置设有第二过切口117b，使得冲压刀具加工过程中能够对硅钢片110过量切削，在硅钢片110的过切口117处形成退刀槽，提高冲压刀具的使用寿命。
请参阅图3至图7，在一可选的实施例中，第一分支1111与第二分支1112的连接位置设有焊接口116，焊接口116位于第二分支1112背离硅钢片110中心的一侧。示例性地，第一分支1111与第二分支1112的中间位置一侧连接，焊接口116设置在第二分支1112的中间位置的另一侧。
具体地，多个硅钢片110上的焊接口116沿多个硅钢片110层叠方向对应设置形成焊接槽101，多个硅钢片110通过位于焊接槽101内的焊点1120固定连接。可以理解的是，焊接口116设置在第二分支1112与第一分支1111的连接位置，焊接口116同时被第一分支1111和第二分支1112支撑，能够有效保证焊接口116的强度，在焊接过程中和焊接后保证分支部111的稳定性。
可以理解的是，第一分支1111与第二分支1112的中间位置一侧连接，能够有效限制第二分支1112的延伸长度，防止第二分支1112的其中一端与第一分支1111距离过长而在加工过程中变形、翘起等。
参阅图4至图7，在一可选的实施方式中，铁芯100包括第一硅钢片110a，第一硅钢片110a包括相对的第一面和第二面，相邻两个第一硅钢片110a其中一个的第一面与另外一个的第二面抵接。第一面上设有凸部113，第二面上设有与凸部113铆接配合的凹部114。可以理解的是，通过对第一硅钢片110a的第一面和第二面施加压合力，使得第一硅钢片110a之间采用铆接配合的形式进行固定。
具体地，凸部113的厚度不大于硅钢片110的厚度，避免相邻第一硅钢片110a之间出现间隙，影响定子10的性能。
请参阅图4至图6，在一可选的实施例中，凹部114和凸部113均设置在第一分支1111上。可以理解的是，凹部114和凸部113还可以设置在其他位置，如第二分支1112或中心部112等，本申请不作限制，能保证相邻两个第一硅钢片110a层叠后的连接强度即可。
请参阅图4至图6，在一可选的实施例中，第一分支1111的数量为凹部114的数量的倍数。具体地，凸部113和凹部114需要均匀间隔保证第一硅钢片110a压合铆接的稳定性，同时第一分支1111的数量为均匀间隔，使得第一分支1111的数量为凹部114的数量的倍数，如一倍、两倍或三倍等。示例性地，第一硅钢片110a中第一分支1111的数量为9个，凸部113和凹部114的数量均为3个，第一分支1111的数量为凹部114的数量的3倍；第一硅钢片110a中第一分支1111的数量为8个，凸部113和凹部114的数量均为4个，第一分支1111的数量为凹部114的数量的2倍。
请参阅图4和图7，在一可选的实施例中，铁芯100包括第二硅钢片110b，第二硅钢片110b上设有与凸部113相适配的通孔115。可以理解的是，最终成型的定子10中，铁芯100表面要求平整光滑，因此多个层叠的第一硅钢片110a中最外侧第一硅钢片110a的凸部113需要覆盖遮挡，将第二硅钢片110b与铁芯100中最外侧的第一硅钢片110a的第一面抵接，铁芯100中最外侧的第一硅钢片110a的第二面与相邻第一硅钢片110a的第一面抵接，最外侧的第一硅钢片110a的凸部113位于通孔115内，使得最终成型的定子10的铁芯100表面没有凸起。
请参阅图1至图3，在一可选的实施例中，铁芯100包括定位槽102，定位槽102设置在铁芯100的内侧面，用于防止硅钢片110在组装过程中出现错位等现象，提高铁芯100的组装效率。
请参阅图8和图9，本申请第二方面提供了一种电机1000，包括如前述的定子10和设置在所定子10外周侧的转子20。定子10用于驱动转子20转动。
请参阅图8和图9，本申请第三方面提供了一种水泵1，包括泵体2000和如前述的电机1000。泵体2000具有内腔2001、连通内腔2001的进液口2002及连通内腔2001的出液口2003，电机1000安装于泵体2000上以驱动液体从进液口2002进入内腔2001并从出液口2003排出。电机1000包括叶轮30，叶轮30设于内腔2001内，叶轮30与泵体2000转动连接，转子20安装于所述叶轮30，定子10安装于泵体2000。
具体地，泵体2000包括底座220、上盖210及密封圈230，上盖210设有环绕内腔2001的环形槽2005，密封圈230夹设于底座220与上盖210之间并部分嵌于环形槽2005内。
运行时，给定子10通交流电，根据电磁感应原理，定子10产生旋转磁场，转子20在旋转磁场中受安培力的作用发生旋转，旋转的转子20带动叶轮30旋转。液体从进液口2002进入内腔2001，在叶轮30的推动下高速旋转并做离心运动，液体到达出液口2003时从出液口2003甩出，液体被甩出后，内腔2001中的压强减小，远小于大气压力，外界的流体在大气压强的作用下从进液口2002补充进内腔2001中，重复地实现上述的动作，实现液体的输送。
由于定子10和转子20之间通过电磁力相互作用，不需要直接连接，因而不需要开设连通内腔2001的安装孔，可以避免内腔2001中的流体通过安装孔发生泄漏。
底座220背对上盖210的一侧设有安装槽2004，定子10嵌于安装槽2004内。通过设置安装槽2004收容定子10，定子10不会增加泵体2000整体的厚度，使得泵体2000的尺寸小。
水泵1还包括安装于底座220的电路板3000，电路板3000通过线缆4000电连接定子10。底座220背对上盖210的一侧设有容纳槽2006，电路板3000嵌于容纳槽2006内。以该实施方式，电路板3000收容于容纳槽2006内，不外露，可以避免在后续的安装工序中，电路板3000上的元器件受到磕碰而损坏，而且，电路板3000收容于容纳槽2006内，电路板3000不会增加泵体2000整体的厚度，使得泵体2000的尺寸小。当然，底座220也可以不设置有容纳槽2006，电路板3000直接安装于底座220的外表面。
底座220背对上盖210的一侧设有走线槽2007，走线槽2007连通安装槽2004和容纳槽2006，线缆4000布置在走线槽2007中。以该实施方式，线缆4000布线在走线槽2007内，不外露，可以避免线缆4000遭受外力拉扯而断裂，而且，线缆4000布线在走线槽2007内，线缆4000不会增加泵体2000整体的厚度，使得泵体2000的尺寸小。当然，底座220也可以不设有走线槽2007，线缆4000直接布线在底座220的外表面。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接。可以是机械连接，也可以是电连接。可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
上文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，上文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
在本说明书的描述中，参考术语“一个实施方式”、“一些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”等的描述意指结合实施方式或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
尽管已经示出和描述了本申请的实施方式，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施方式进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (10)

  1. 一种定子，包括铁芯和绕组，所述绕组绕设在所述铁芯外，其特征在于，所述铁芯包括多个层叠的硅钢片；
    其中，所述硅钢片上设有多个过切口，多个所述硅钢片上的过切口沿多个所述硅钢片的层叠方向对应设置形成过切槽，所述绕组的两端均与所述过切槽抵接。
  2. 根据权利要求1所述的定子，其特征在于，所述硅钢片包括中心部和多个分支部，多个所述分支部与所述中心部连接并成型为一体，多个所述分支部沿所述中心部的周向间隔均布; 所述绕组绕设在所述分支部外，所述分支部与所述中心部的连接位置设有第一过切口。
  3. 根据权利要求2所述的定子，其特征在于，所述分支部包括沿所述中心部径向延伸的第一分支和沿所述中心部的周向延伸的第二分支;所述第一分支与所述第二分支的连接位置设有第二过切口，所述第二过切口位于所述第二分支朝向所述硅钢片中心的一侧。
  4. 根据权利要求3所述的定子，其特征在于，所述第二分支与所述第一分支垂直连接，且所述第一分支与所述第二分支的连接位置设有焊接口，所述焊接口位于所述第二分支背离所述硅钢片中心的一侧。
  5. 根据权利要求3所述的定子，其特征在于，所述多个硅钢片包括第一硅钢片，所述第一硅钢片包括相对的第一面和第二面，相邻两个所述第一硅钢片其中一个的第一面与另外一个的第二面抵接；所述第一面上设有凸部，所述第二面上设有与所述凸部铆接配合的凹部；所述凸部的厚度不大于所述硅钢片的厚度。
  6. 根据权利要求5所述的定子，其特征在于，所述凹部和所述凸部均设置在所述第一分支上。
  7. 根据权利要求6所述的定子，其特征在于，所述第一分支的数量为所述凹部的数量的倍数。
  8. 根据权利要求5所述的定子，其特征在于，所述多个硅钢片包括第二硅钢片，所述第二硅钢片上设有与所凸部相适配的通孔；所述第二硅钢片与所述铁芯中最外侧的第一硅钢片的第一面抵接，所述铁芯中最外侧的第一硅钢片的第二面与相邻第一硅钢片的第一面抵接。
  9. 一种电机，其特征在于，包括：
    如权利要求1-8中任一项所述的定子；
    转子，设置在所述定子外周侧，所述定子用于驱动所述转子转动。
  10. 一种水泵，其特征在于，包括泵体和如权利要求9所述的电机，所述泵体具有内腔、连通所述内腔的进液口及连通所述内腔的出液口，所述电机安装于所述泵体上以驱动液体从所述进液口进入所述内腔并从所述出液口排出；
    所述电机包括叶轮，所述叶轮设于所述内腔内，所述泵体设有转轴，所述叶轮与所述转轴转动连接，所述转子安装于所述叶轮，所述定子安装于所述泵体。
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JP2005117702A (ja) * 2003-10-02 2005-04-28 Aisan Ind Co Ltd 燃料ポンプ装置
CN203942340U (zh) * 2014-06-26 2014-11-12 杨雯博 一种外转子电机的定子冲片
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CN205883016U (zh) * 2016-07-07 2017-01-11 洛阳中方实业有限公司 一种无刷电机
CN107026519A (zh) * 2016-01-29 2017-08-08 浙江三花汽车零部件有限公司 定子组件以及具有该定子组件的电机和电子泵
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JP2005117702A (ja) * 2003-10-02 2005-04-28 Aisan Ind Co Ltd 燃料ポンプ装置
US20140348673A1 (en) * 2013-05-24 2014-11-27 Panasonic Corporation Electric motor and compressor with same
CN203942340U (zh) * 2014-06-26 2014-11-12 杨雯博 一种外转子电机的定子冲片
CN107026519A (zh) * 2016-01-29 2017-08-08 浙江三花汽车零部件有限公司 定子组件以及具有该定子组件的电机和电子泵
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