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WO2022110406A1 - 定子、电机及水泵 - Google Patents

定子、电机及水泵 Download PDF

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Publication number
WO2022110406A1
WO2022110406A1 PCT/CN2020/138093 CN2020138093W WO2022110406A1 WO 2022110406 A1 WO2022110406 A1 WO 2022110406A1 CN 2020138093 W CN2020138093 W CN 2020138093W WO 2022110406 A1 WO2022110406 A1 WO 2022110406A1
Authority
WO
WIPO (PCT)
Prior art keywords
silicon steel
branch
stator
steel sheet
welding
Prior art date
Application number
PCT/CN2020/138093
Other languages
English (en)
French (fr)
Inventor
许德涛
张奇
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声光电科技(常州)有限公司
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 瑞声声学科技(深圳)有限公司, 瑞声光电科技(常州)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022110406A1 publication Critical patent/WO2022110406A1/zh

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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
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

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 part in the water pump, which directly affects the life and efficiency of the water pump and other key attributes.
  • the stator includes an iron core and windings.
  • the stator is formed by stacking multiple layers of silicon steel sheets, and is treated as a coil skeleton after deburring or electrophoresis.
  • the silicon steel sheet in the stator only relies on the riveting and pressing force.
  • the head of the claw teeth of the outer silicon steel sheet is warped and deformed.
  • the purpose of this application is to provide a stator, a motor and a water pump, which can solve the problem of deformation of the outer silicon steel sheet of the stator during processing.
  • the embodiment of the present application provides a stator, including 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 sheets ;
  • the silicon steel sheet includes a central portion and a plurality of branch portions, a plurality of the branch portions are connected with the central portion and formed into one body, and a plurality of the branch portions are arranged at intervals along the circumferential direction of the central portion;
  • the branch portion includes a first branch extending radially along the center portion and a second branch extending along the circumferential direction of the center portion, and the winding is wound on the first branch;
  • the outer peripheral side of the second branch away from the central part is provided with a welding port; the welding ports on the plurality of silicon steel sheets together form a welding groove, and the plurality of the silicon steel sheets pass through the welding points in the welding groove along the The stacking direction of the silicon steel sheets is fixed by welding.
  • the plurality of branch portions are evenly distributed along the circumferential direction of the central portion.
  • the second branch is vertically connected to the first branch, and the welding port is provided at the connection position of the second branch and the first branch.
  • 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 side of one abuts the second side of the other.
  • the first surface is provided with a convex portion
  • the second surface is provided with a concave portion that is riveted and fitted with the convex portion; the convex portion is correspondingly accommodated in the concave portion.
  • 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 is connected to the The first surface of the outermost first silicon steel sheet in the iron core abuts.
  • the second purpose of this 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 object 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, so that the 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.
  • a welding port is provided on the outer peripheral side of the second branch away from the center, and the welding ports on the multiple silicon steel sheets together form a welding groove for accommodating the welding point, so that the welding ports of the multiple silicon steel sheets
  • the outer edge can be connected by welding, which effectively avoids the edge of the outer silicon steel sheet from lifting, ensures the complete appearance of the iron core, and improves 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:
  • stator 100, iron core; 110, silicon steel sheet; 110a, first silicon steel sheet; 110b, second silicon steel sheet; 111, branch part; 1111, first branch; 1112, second branch; 112, central part; 113, convex part; 114, concave part; 115, through hole; 116, welding port; 120, welding point; 101, welding groove; 102, positioning groove; 200, winding;
  • 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 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 formed into one body.
  • the same winding 200 is wound outside the branch portion 111 .
  • the branch portion 111 includes a first branch 1111 extending radially along the center portion 112 and a second branch 1112 extending along the circumferential direction of the center portion 112 , the winding 200 is wound on the first branch 1111 , and the two branches of the winding 200 The ends abut against the second branch 1112 and the central portion 112 .
  • the second branch 1112 is provided with a welding port 116 on the outer peripheral side of the second branch 1112 away from the center portion 112 .
  • the welding ports 116 on the plurality of silicon steel sheets 110 together form the welding groove 101 , and the plurality of silicon steel sheets 110 pass through the welding points located in the welding groove 101 .
  • 120 is welded and fixed along the stacking direction of the silicon steel sheet 110 .
  • a plurality of silicon steel sheets 110 are stacked to form the iron core 100 .
  • the edge of the outer silicon steel sheet 110 is prone to warp, which affects the appearance and appearance of the stator 10 . performance.
  • a welding port 116 is provided on the outer peripheral side of the second branch 1112 away from the center portion 112, and the welding ports 116 on the plurality of silicon steel sheets 110 together form the welding groove 101 for accommodating the welding point 120, so that a plurality of silicon steel sheets 110 are formed.
  • the second branch 1112 of the sheet 110 can be connected by welding, which effectively prevents the edge of the outer silicon steel sheet 110 from being lifted, ensures the appearance of the iron core 100 is complete, and improves the performance 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.
  • the number of the branch parts 111 depends on the performance of the stator 10 , which is not limited in the embodiment of the present application.
  • the plurality of branch portions 111 are evenly distributed around the central portion 112 . It can be understood that the uniform distribution of the plurality of branch portions 111 can enable the stator 10 to generate uniform magnetic lines of induction, thereby enhancing the working efficiency of the stator 10 .
  • the second branch 1112 is perpendicular to the first branch 1111 , the contour of the outer peripheral 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 whole of the silicon steel sheet 110 is
  • the shape is circular, which is convenient for the installation and combination of the iron core 100 .
  • the plurality of silicon steel sheets 110 are connected by laser welding at the welding port 116 .
  • the thickness limitation of the silicon steel sheet 110 in the stator 10 makes the ordinary welding method unable to meet the welding requirements of the silicon steel sheet 110, while the metallographic variation range of the heat affected zone of laser welding is small, and the deformation beam caused by heat conduction is low, and the laser beam can be focused. In a small area, small and closely spaced parts can be welded, and when welding thin or thin wire, there is no problem of reflow like arc welding.
  • the welding port 116 is disposed at the connection position of the second branch 1112 and the first branch 1111 .
  • 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 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 sheets 110a is in contact with 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 .
  • the convex portion 113 is correspondingly accommodated in the concave portion 114 . 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)
  • Manufacturing & Machinery (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）。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）连接并成型为一体，多个分支部（111）沿中心部（112）的周向间隔设置。分支部（111）包括沿中心部（112）径向延伸的第一分支（1111）和沿中心部（112）的周向延伸的第二分支（1112），绕组（200）绕设于第一分支（1111）上。其中，第二分支（1112）背离中心部（112）的外周侧设有焊接口（116），多个硅钢片（110）上的焊接口（116）共同组成焊接槽（101），多个硅钢片（110）通过焊接槽（101）内的焊点（120）沿硅钢片（110）的层叠方向焊接固定，有效避免了外层硅钢片（110）的边缘翘起，保证了铁芯（100）的外观完整，提升了定子（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
定子是水泵中必不可少的部件，直接影响水泵的寿命、效率等关键属性。
定子包括铁芯和绕组，定子由多层硅钢片叠合而成，并经去毛刺或电泳等处理后作为线圈骨架。现有的微型水泵中，定子中的硅钢片只依赖铆接压合作用力，在机械去毛刺过程中，出现外层硅钢片爪齿头部起翘变形情况。
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
现有水泵的定子的硅钢片由于结构限制，在机械去毛刺过程中，出现外层硅钢片爪齿头部起翘变形。
 技术解决方案
本申请的目的在于提供一种定子、电机及水泵，能够解决定子外层硅钢片在加工中变形的问题。
本申请的目的之一采用如下技术方案实现：本申请实施例提供一种定子，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；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设置；单个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，所述绕组绕设于所述第一分支上；
其中，所述第二分支背离所述中心部的外周侧设有焊接口；多个所述硅钢片上的焊接口共同组成焊接槽，多个所述硅钢片通过所述焊接槽内的焊点沿所述硅钢片的层叠方向焊接固定。
在本申请实施例提供的定子中，多个所述分支部沿所述中心部周向均匀分布。
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，所述焊接口设置在所述第二分支与所述第一分支的连接位置。
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。
在本申请实施例提供的定子中，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；所述凸部对应收容于所述凹部。
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述凸部相适配的通孔；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。
本申请的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。
本申请的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，在第二分支背离中心部的外周侧设置焊接口，多个硅钢片上的焊接口共同组成用于容纳焊点的焊接槽，使得多个硅钢片的外边缘能够通过焊接连接，有效避免了外层硅钢片边缘翘起，保证了铁芯的外观完整，提升了定子的性能。
 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；120、焊点；101、焊接槽；102、定位槽；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。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连接并成型为一体，多个分支部111沿中心部112的周向间隔设置，且与分支部111数量相同的绕组200绕设在分支部111外。具体地，分支部111包括沿中心部112径向延伸的第一分支1111和沿中心部112的周向延伸的第二分支1112，绕组200绕设于第一分支1111上，且绕组200的两端与第二分支1112和中心部112抵接。
其中，第二分支1112背离中心部112的外周侧的设有焊接口116，多个硅钢片110上的焊接口116共同组成焊接槽101，多个硅钢片110通过位于焊接槽101内的焊点120沿硅钢片110的层叠方向焊接固定。
可以理解的是，多个硅钢片110层叠组成铁芯100，在铁芯100进行机械去毛刺等加工过程中，很容易出现外层的硅钢片110边缘翘起的情况，影响定子10的外观及性能。
通过采用以上技术方案，在第二分支1112背离中心部112的外周侧设置焊接口116，多个硅钢片110上的焊接口116共同组成用于容纳焊点120的焊接槽101，使得多个硅钢片110的第二分支1112能够通过焊接连接，有效避免了外层硅钢片110边缘翘起，保证了铁芯100的外观完整，提升了定子10的性能。
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。分支部111的数量取决于定子10的性能，本申请实施例不作限制。
在一可选的实施例中，多个分支部111绕中心部112均匀分布。可以理解的是，多个分支部111间隔均布能够使得定子10产生均匀磁感线，增强定子10的工作效率。
示例性地，第二分支1112与第一分支1111垂直，第二分支1112远离分支部111的外周侧的轮廓为弧形，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。
可以理解的是，多个硅钢片110之间通过在焊接口116处进行激光焊进行连接。定子10中的硅钢片110厚度限制使得普通的焊接方式不能满足硅钢片110的焊接需求，而激光焊热影响区金相变化范围小，且因热传导所导致的变形梁低，同时激光束可聚焦在很小的区域，可焊接小型且间隔相近的部件，焊接薄材或细径线材时，不会像电弧焊接有回熔的困扰。
请参阅图3至图7，在一可选的实施例中，焊接口116设置在第二分支1112与第一分支1111的连接位置。具体地，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。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。
请参阅图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。凸部113对应收容于凹部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；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设置；单个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，所述绕组绕设于所述第一分支上；
    其中，所述第二分支背离所述中心部的外周侧设有焊接口；多个所述硅钢片上的焊接口共同组成焊接槽，多个所述硅钢片通过所述焊接槽内的焊点沿所述硅钢片的层叠方向焊接固定。
  2. 根据权利要求1所述的定子，其特征在于，多个所述分支部沿所述中心部的周向均匀分布。
  3. 根据权利要求1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，且所述焊接口设置在所述第二分支与所述第一分支的连接位置。
  4. 根据权利要求1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。
  5. 根据权利要求4所述的定子，其特征在于，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；所述凸部对应收容于所述凹部。
  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5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述凸部相适配的通孔；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。
  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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JPH077876A (ja) * 1993-06-18 1995-01-10 Matsushita Electric Ind Co Ltd 電動機
JP2001057747A (ja) * 1999-08-12 2001-02-27 Sankyo Seiki Mfg Co Ltd モータの積層コア及びその製造方法ならびにモータ
CN1627596A (zh) * 2003-12-12 2005-06-15 乐金电子(天津)电器有限公司 外齿型螺旋线定子铁芯
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