WO2023028985A1 - 定子组件用槽楔及定子组件 - Google Patents

定子组件用槽楔及定子组件 Download PDF

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Publication number
WO2023028985A1
WO2023028985A1 PCT/CN2021/116440 CN2021116440W WO2023028985A1 WO 2023028985 A1 WO2023028985 A1 WO 2023028985A1 CN 2021116440 W CN2021116440 W CN 2021116440W WO 2023028985 A1 WO2023028985 A1 WO 2023028985A1
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WO
WIPO (PCT)
Prior art keywords
conductor
slot
slot wedge
stator assembly
iron core
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PCT/CN2021/116440
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English (en)
French (fr)
Inventor
李向阳
李明哲
舒森
Original Assignee
舍弗勒技术股份两合公司
李向阳
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Application filed by 舍弗勒技术股份两合公司, 李向阳 filed Critical 舍弗勒技术股份两合公司
Priority to PCT/CN2021/116440 priority Critical patent/WO2023028985A1/zh
Priority to CN202180099080.9A priority patent/CN117501588A/zh
Priority to EP21955519.0A priority patent/EP4398454A1/de
Publication of WO2023028985A1 publication Critical patent/WO2023028985A1/zh

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    • 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
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • 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
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation

Definitions

  • the invention relates to the field of electric motors, and in particular to a slot wedge for a stator assembly of an electric motor and a stator assembly including the slot wedge.
  • slot wedges are used to close the radial openings of the conductor slots of the iron core of the stator assembly. After the conductor part (such as a wave winding) is inserted into the conductor slot, the slot wedge is installed at the radial opening of the conductor slot to prevent the conductor part from coming out of the conductor slot through the radial opening, and the slot wedge can also improve the connection between the core and the conductor part. insulation performance between.
  • the iron core 10 of the stator assembly is formed with a plurality of conductor slots 10h opening radially inward.
  • the insulating paper 20 is installed in each conductor slot 10h in a manner of sticking to the peripheral wall of each conductor slot 10h, and then the conductor part 30 (such as a wave winding) is passed through the radial opening of the conductor slot 10h from the radial inside to insert In the conductor groove 10h (shown by the arrow in FIG. 1A ).
  • the insulating paper 20 can prevent the conductor part 30 from being damaged due to contact with the iron core 10 , and the insulating paper 20 can provide supplementary insulation between the conductor part 30 and the iron core 10 .
  • the radial opening width of the conductor slot 10h is greater than the width of the conductor part 30, so after the conductor part 30 is inserted into the conductor slot 10h, the conductor part 30 has the risk of coming out of the conductor slot 10h . Furthermore, as shown in FIG.
  • the slot wedge 40 is installed at the radial opening of the conductor slot 10h to prevent the conductor part 30 from coming out of the conductor slot 10h.
  • the present invention is made based on the defects of the above-mentioned prior art.
  • An object of the present invention is to provide a slot wedge for a stator assembly, which can improve the insulation performance between the iron core and the conductor part due to insufficient creepage distance described in the background art above when it can be smoothly inserted into the conductor slot The problem.
  • Another object of the present invention is to provide a stator assembly comprising the above slot wedge.
  • the present invention provides a slot wedge for a stator assembly, which is used to be installed in a conductor slot of an iron core of the stator assembly, the slot wedge is formed in a straight rod shape and has a length direction and a width direction orthogonal to each other and the height direction,
  • the slot wedge includes a central portion in the width direction and end portions in the width direction, the end portions in the width direction are located outside the central portion in the width direction, grooves are formed in the end portions in the width direction, and the grooves open toward one side in the height direction and recessed toward the other side in the height direction, the groove extending linearly along the length direction,
  • the central part is used to support the conductor part in the conductor groove, and the groove is used to accommodate the radial direction of the sheet insulator in the conductor groove. inner end.
  • each of the grooves includes a constant width portion and a gradually widening portion communicating with each other in the length direction, and the gradually widening portion is located outside the length direction of the constant width portion, so The width of the gradually widening portion gradually becomes wider from the constant width portion toward the outside in the longitudinal direction.
  • the inner wall in the width direction and/or the outer wall in the width direction used to form the gradually widening portion extend obliquely relative to the length direction.
  • the depth of the groove is configured such that, when the slot wedge is installed in the conductor slot, the diameter of the sheet insulator The inboard end is spaced from the bottom of the groove.
  • the end portion in the width direction is formed into a shape whose height gradually decreases toward the outside in the width direction.
  • the slot wedge in any cross-section of the slot wedge, has a symmetrical shape with respect to a widthwise center line extending along the height direction.
  • the present application also provides the following stator assembly, which includes the slot wedge for the stator assembly described in any one of the above technical solutions.
  • the stator assembly further includes an iron core, the iron core is formed with a plurality of radially extending conductor slots, and the side walls of the conductor slots are formed with slot wedge installation parts, so The slot wedge mounting portion matches the shape of the width direction end of the slot wedge,
  • the slot wedge is installed such that the length direction is along the axial direction of the iron core, the height direction is along the radial direction of the iron core, and the width direction is substantially along the circumferential direction of the iron core. corresponding to the slot wedge installation part.
  • the stator assembly further includes a sheet insulator and a conductor part
  • the sheet insulator includes an attachment part attached to the peripheral wall of the conductor slot and a groove inserted into the slot wedge
  • the radially inner end portion of the plurality of conductor portions is accommodated in the conductor groove in a manner of being arranged along the radial direction and separated from the iron core by the sheet-shaped insulator, and the conductor portions are enclosed by the The central part of the slot wedge is supported.
  • the iron core includes an abutting portion located at the radial opening of the conductor slot, the slot wedge abuts against the abutting portion in the radial direction, and The radial direction is located between the abutting portion and the conductor portion.
  • the present invention provides a novel slot wedge for a stator assembly and a stator assembly including the slot wedge.
  • the slot wedge includes, in the width direction, a central portion and widthwise end portions located on the widthwise outer side of the central portion.
  • a groove is formed at the end in the width direction.
  • the groove is open toward one side in the height direction and recessed toward the other side in the height direction.
  • the groove also extends linearly along the length direction, especially through the slot wedge.
  • the central portion is for supporting the conductor portion in the conductor slot and the groove is for receiving the radially inner end portion of the sheet-like insulator (such as insulating paper) located in the conductor slot .
  • FIG. 1A shows a partial assembly process of a stator assembly for an electric motor, in which the conductor part is inserted into the conductor slot of the iron core along the direction of the arrow.
  • FIG. 1B is a partial schematic diagram showing a stator assembly for an electric motor assembled using the assembly process in FIG. 1A , wherein the slot wedge and insulating paper are in an ideal assembled state.
  • FIG. 1C is a partial schematic view showing a stator assembly for an electric machine assembled using the assembly process in FIG. 1A , where there is a gap between the slot wedge and the end of the insulating paper.
  • Fig. 2A is a schematic perspective view showing a slot wedge for a stator assembly for an electric motor according to an embodiment of the present invention.
  • Fig. 2B is a schematic diagram showing a partial structure of the slot wedge in Fig. 2A including the ends in the length direction.
  • Fig. 3A is a schematic diagram showing a partial structure of a stator assembly for a motor according to an embodiment of the present invention.
  • FIG. 3B is a partial structural schematic diagram showing the stator assembly for the motor in FIG. 3A , where no other components are installed in the conductor slot of the iron core.
  • Fig. 3C is a partial structural schematic diagram showing the stator assembly for the motor in Fig. 3A, wherein insulating paper has been installed in the conductor slot of the iron core.
  • FIG. 3D is a partial structural schematic diagram showing the stator assembly for the motor in FIG. 3A , where the insulating paper, the conductor part and the slot wedge shown in FIG. 2A have been installed in the conductor slot of the iron core.
  • FIG. 3E is an enlarged schematic view showing a partial structure in FIG. 3D.
  • slot wedge 1m central part 1s support surface 1e width direction end 1c groove 1c1 constant width part 1c2 gradual width part 2 iron core 2h conductor slot 21 iron core tooth part 211 abutment part 212 slot wedge installation part 3 insulating paper 31 stickers Attachment 32 Radial inner end part 4 Conductor part
  • width direction refers to the length direction, width direction and height direction of the slot wedge respectively
  • height direction refers to the side away from the central plane extending along the height direction and the length direction of the slot wedge in the width direction, that is, the two ends of the width direction.
  • the outside in the length direction refers to the side in the length direction away from the center plane extending in the height direction and width direction of the slot wedge, that is, the length direction
  • the inner side of the length direction refers to the side that is close to the center plane of the slot wedge extending along the height direction and width direction in the length direction, that is, the center side in the length direction
  • axial, “radial” and “Circumferential” respectively refers to the axial, radial and circumferential directions of the stator assembly (iron core) for the motor.
  • a slot wedge 1 for a stator assembly is used to be installed in a conductor slot 2h of an iron core 2 of a stator assembly.
  • the slot wedge 1 is formed in a straight rod shape and has a length direction L, a width direction W, and a height direction H orthogonal to each other.
  • the slot wedge 1 in any cross-section of the slot wedge 1, the slot wedge 1 has a symmetrical shape with respect to the center line in the width direction extending along the height direction H, that is to say, the slot wedge 1 has a shape
  • the central plane extending in the direction H and the length direction L forms a mirror-symmetrical structure.
  • the outer profile of the slot wedge 1 is the same throughout the length direction L.
  • the slot wedge 1 includes a central portion 1 m and two widthwise end portions 1 e located on the widthwise outer side of the central portion 1 m.
  • the surface on one side in the height direction of the central portion 1 m is formed as a flat support surface 1 s.
  • the support surface 1s of the central portion 1m is opposed to and supports the conductor portion 4 in the conductor groove 2h in a state where the slot wedge 1 is inserted into the below-described wedge mounting portion 212 of the conductor groove 2h.
  • the widthwise end portions 1 e are formed in a shape whose height gradually decreases toward the widthwise outer side from the central portion 1 m .
  • Each widthwise end portion 1e is formed with a groove 1c.
  • the groove 1c is open toward one side in the height direction and recessed toward the other side in the height direction.
  • the groove 1c extends linearly along the length direction L, especially through the slot wedge 1 .
  • the groove 1c extends to a predetermined depth in the height direction H such that the radially inner end 32 of the insulating paper 3 is spaced from the bottom of the groove 1c in a state where the slot wedge 1 is inserted into the conductor slot 2h.
  • the slot wedge 1 will not interfere with the insulating paper 3 when the slot wedge 1 is inserted into the conductor slot 2h.
  • the groove 1c is used to receive the radially inner end of the insulating paper 3 located in the conductor slot 2h Section 32.
  • each groove 1c includes a constant-width portion 1c1 and a tapered-width portion 1c2 communicating with each other.
  • the constant width portion 1c1 has always the same width in the longitudinal direction L.
  • the tapered portion 1c2 is located outside the constant width portion 1c1 in the longitudinal direction, and the width of the tapered portion 1c2 gradually becomes wider from the constant width portion 1c1 toward the outside in the longitudinal direction.
  • the inner wall in the width direction for forming the tapered portion 1c2 extends obliquely with a larger inclination angle with respect to the length direction
  • the outer wall in the width direction for forming the tapered portion 1c2 has a larger inclination angle with respect to the length direction L.
  • the tapered portion 1 c 2 has a gradually widening shape.
  • the gradually widening portion 1c2 can guide the radially inner end portion 32 of the insulating paper 3 to the constant width portion 1c1 smoothly.
  • stator assembly for a motor including the slot wedge 1 described above will be described below.
  • a stator assembly for a motor includes the above-mentioned slot wedge 1 , iron core 2 , insulating paper 3 and conductor part 4 .
  • the structure of the iron core 2 includes a cylindrical iron core main body and a plurality of iron core teeth 21 protruding radially inward from the iron core main body.
  • each core tooth portion 21 has the same shape and size.
  • a conductor slot 2h extending in the radial direction is formed between every two adjacent iron core tooth portions 21 . Since the plurality of core tooth portions 21 are uniformly distributed in the circumferential direction, the plurality of conductor slots 2h are also uniformly distributed in the circumferential direction.
  • each iron core tooth portion 21 at the radial opening of the conductor slot 2h forms a dovetail shape, whereby the dovetail shape of the adjacent iron core tooth portions 21 is formed for
  • the abutment portion 211 abuts against the slot wedge 1 correspondingly.
  • the iron core tooth portion 21 forms the side wall of the conductor slot 2h, and a part of the side wall of the conductor slot 2h close to the radial opening forms the slot wedge mounting portion 212.
  • the width of the wedge mounting portion 212 in the circumferential direction is greater than that of other parts of the conductor slot 2h, and the cross-sectional profile shape of the wedge mounting portion 212 matches the outer profile shape of the widthwise end portion 1e of the slot wedge 1 .
  • the radially inner ends 32 of the insulating paper 3 are positioned at the slot wedge mounting portion 212, so that, on the one hand, the two radially inner ends 32 of the insulating paper 3 can be Circumferentially away from each other, it is convenient for the conductor portion 4 to be inserted into the conductor slot 2h through the radial opening of the conductor slot 2h without causing the radial inner end 32 of the insulating paper 3 to roll up; on the other hand, it is convenient for the radial direction of the insulating paper 3
  • the inner end 32 is inserted into the groove 1c of the slot wedge 1, so that the slot wedge 1 is smoothly inserted into the conductor slot 2h at the slot wedge mounting portion 212 along the axial direction.
  • the insulating paper 3 includes an attachment portion 31 attached to the conductor slot 2h in a manner of attaching to the peripheral wall of the conductor slot 2h, and a radially inner portion extending into the slot wedge installation portion 212. end 32.
  • the sticking part 31 of the insulating paper 3 is interposed, and the sticking part 31 of the insulating paper 3 is used as the conductor part 4 and the iron core 2. Supplementary insulation between.
  • the radially inner end 32 of the insulating paper 3 is separated from the sidewall of the conductor slot 2h and extends into the groove 1c of the slot wedge 1, thereby effectively extending the creepage distance formed by the overlapping portion of the insulating paper 3 and the slot wedge 1 . Further, a predetermined gap is formed between the radially inner end of the insulating paper 3 and the bottom of the groove 1c of the slot wedge 1, so that the slot wedge 1 will not interfere with the insulating paper 3 when it is inserted into the conductor slot 2h, The smooth insertion of the slot wedge 1 is guaranteed.
  • the conductor part 4 may be a wave winding.
  • the plurality of conductor parts 4 are accommodated in the conductor slot 2h so as to be aligned in the radial direction, and the sticking part 32 of the insulating paper 3 is interposed therebetween from the iron core 2 .
  • the slot wedge 1 Utilizing the pressure on the slot wedge 1 generated by the interaction between the conductor parts 4, the slot wedge 1 is interposed between the conductor part 4 and the abutting part 211 in the radial direction, so that the width direction end 1e of the slot wedge 1 is in contact with the iron core The abutting portion 211 of 2 abuts against each other, thereby preventing the conductor part 4 from coming out of the conductor slot 2h.
  • the insulating paper 3 is accommodated and installed in the conductor slot 2h of the iron core 2;
  • a plurality of conductor portions 4 are sequentially inserted into the conductor groove 2h from the radially inner side through the radial opening of the conductor groove 2h, so that the plurality of conductor portions 4 are arranged radially;
  • the slot wedge 1 is inserted in the axial direction at a radially inner position of the radially innermost conductor portion 4 so that the slot wedge 1 A slot wedge installed in the corresponding conductor slot 2h in such a way that its length direction L is along the axial direction of the iron core 2, its height direction H is along the radial direction of the iron core 2, and its width direction W is approximately along the circumferential direction of the iron core 2.
  • the mounting portion 212 leans against the abutting portion 211 .
  • the central portion 1 m of the slot wedge 1 is opposite to the radially innermost conductor portion 4 , and the supporting surface 1 s of the central portion 1 m is used to support the conductor portion 4 when the slot wedge 1 is inserted in place.
  • the slot wedge 1 since the slot wedge 1 according to an embodiment of the present invention has the groove 1c, the radially inner end portion 32 of the insulating paper 3 is inserted into the groove 1c and has a space from the bottom of the groove 1c, thus maximally This avoids excessive interference between the slot wedge 1 and the insulating paper 3 during axial insertion into the conductor slot 2h, thereby ensuring that the slot wedge 1 is smoothly inserted into the conductor slot 2h, which is conducive to mass production.
  • the insulating paper 3 is used as an example of the sheet insulator for illustration, the present invention is not limited thereto, and other forms of sheet insulators can be used as supplementary insulation between the conductor portion 4 and the iron core 2 .
  • the slot wedge 1 can be made of insulating material, and the type of insulating material can be changed as required. Further, the use of appropriate materials and the groove 1c formed by the slot wedge 1 can make the slot wedge 1 have a certain degree of elasticity, thereby preventing the slot wedge 1 from colliding with the iron core 2 when the slot wedge 1 is inserted into the conductor slot 2h. damage.
  • the slot wedge 1 After the slot wedge 1 is inserted into the slot wedge installation part 212 installed in the conductor slot 2h, the slot wedge 1 is pressed against the abutting part 211 by the force of the conductor part 4, so that the slot wedge 1 does not produce undesired play. movement, ensuring the NVH performance of the entire stator assembly.
  • the conductor slot 2h has a radial opening open toward the radially inner side
  • the present invention is not limited thereto.
  • the conductor groove 2h may not be formed with a radial opening open toward the radially inner side, but may instead be formed with a radial opening open toward the radially outer side. the peripheral part.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

提供了一种定子组件用槽楔，其用于安装于定子组件的铁芯(2)的导体槽(2h)中。槽楔(1)在宽度方向(W)上包括中央部(1m)和宽度方向端部(1e)。宽度方向端部(1e)形成有凹槽(1c)，凹槽(1c)朝向高度方向一侧开放且朝向高度方向另一侧凹陷，凹槽(1c)沿着长度方向(L)直线状地延伸。在槽楔(1)安装于导体槽(2h)的状态下，中央部(1m)用于支撑导体槽(2h)内的导体部(4)，凹槽(1c)用于收纳导体槽(2h)内的片状绝缘体的径向内侧端部(32)。这样，能够保证槽楔的顺利插入导体槽中并改善铁芯与导体部之间的绝缘性能。还提供了一种包括该槽楔的定子组件。

Description

定子组件用槽楔及定子组件 技术领域
本发明涉及电机领域，且特别地涉及一种用于电机的定子组件用槽楔及包括该槽楔的定子组件。
背景技术
在现有的用于电机的定子组件中，槽楔被用于封闭定子组件的铁芯的导体槽的径向开口。在导体部(例如波绕组)插入导体槽之后，将槽楔安装于导体槽的径向开口处，以防止导体部经由径向开口从导体槽脱出，并且槽楔还能够改善铁芯与导体部之间的绝缘性能。
具体地，如图1A所示，定子组件的铁芯10形成有多个朝向径向内侧开口的导体槽10h。首先绝缘纸20被以贴附各导体槽10h的周壁的方式安装于各导体槽10h中，然后使导体部30(例如波绕组)从径向内侧穿过导体槽10h的径向开口，以插入导体槽10h中(如图1A中的箭头所示)。在导体部30插入的过程中，绝缘纸20能够防止导体部30与铁芯10发生接触而受到损坏，并且绝缘纸20能够在导体部30和铁芯10之间提供补充绝缘。通常，为了确保导体部30顺利插入导体槽10h，导体槽10h的径向开口宽度大于导体部30的宽度，因而在导体部30插入导体槽10h之后，导体部30具有从导体槽10h脱出的风险。进而，如图1B所示，在各导体槽10h中已经收纳安装预定数量的导体部30之后，将槽楔40安装于导体槽10h的径向开口处，来防止导体部30从导体槽10h脱出。
虽然在安装槽楔40之后期望槽楔40和绝缘纸20之间存在如图1B所示的理想的装配状态，也就是绝缘纸20的端部恰好与槽楔40接触，但是一般在实际生产过程中绝缘纸20的尺寸存在公差，而且为了保证槽楔40能够顺利地插 入导体槽10h而不会与绝缘纸20发生干涉，所以槽楔40与绝缘纸20的端部之间经常存在如图1C所示的间隔G。这样的间隔G将导致爬电距离不足，从而使得铁芯10与导体部30之间的绝缘性能不佳。
发明内容
基于上述现有技术的缺陷而做出了本发明。本发明的一个目的在于提供一种定子组件用槽楔，其在能够顺利插入导体槽的情况下改善上述背景技术中所述的爬电距离不足导致铁芯与导体部之间的绝缘性能不佳的问题。本发明的另一个目的在于提供一种包括上述槽楔的定子组件。
为了实现上述发明目的，本发明采用如下的技术方案。
本发明提供了一种如下的定子组件用槽楔，其用于安装于所述定子组件的铁芯的导体槽中，所述槽楔形成为直杆状并且具有彼此正交的长度方向、宽度方向和高度方向，
所述槽楔在所述宽度方向上包括中央部和宽度方向端部，所述宽度方向端部位于所述中央部的宽度方向外侧，所述宽度方向端部形成有凹槽，所述凹槽朝向高度方向一侧开放且朝向高度方向另一侧凹陷，所述凹槽沿着所述长度方向直线状地延伸，
在所述槽楔安装于所述导体槽的状态下，所述中央部用于支撑所述导体槽内的导体部，所述凹槽用于收纳所述导体槽内的片状绝缘体的径向内侧端部。
在一种可选的方案中，每个所述凹槽在所述长度方向上包括彼此连通的恒宽部和渐宽部，所述渐宽部位于所述恒宽部的长度方向外侧，所述渐宽部的宽度从所述恒宽部朝向长度方向外侧逐渐变宽。
在另一种可选的方案中，用于形成所述渐宽部的宽度方向内侧壁和/或宽 度方向外侧壁相对于所述长度方向倾斜地延伸。
在另一种可选的方案中，在所述高度方向上，所述凹槽的深度被构造成使得，在所述槽楔安装于所述导体槽的状态下，所述片状绝缘体的径向内侧端部与所述凹槽的底部具有间隔。
在另一种可选的方案中，所述宽度方向端部形成为高度朝向宽度方向外侧逐渐减小的形状。
在另一种可选的方案中，在所述槽楔的任意横截面中，所述槽楔具有相对于沿着所述高度方向延伸的宽度方向中心线对称的形状。
本申请还提供了一种如下的定子组件，其包括以上技术方案中任意一项技术方案所述的定子组件用槽楔。
在一种可选的方案中，所述定子组件还包括铁芯，所述铁芯形成有多个沿着径向延伸的导体槽，所述导体槽的侧壁形成有槽楔安装部，所述槽楔安装部与所述槽楔的宽度方向端部的形状匹配，
所述槽楔以所述长度方向沿着所述铁芯的轴向、所述高度方向沿着所述铁芯的径向且所述宽度方向大致沿着所述铁芯的周向的方式安装于对应的所述槽楔安装部。
在另一种可选的方案中，所述定子组件还包括片状绝缘体和导体部，所述片状绝缘体包括贴附所述导体槽的周壁的贴附部和插入所述槽楔的凹槽的径向内侧端部，多个所述导体部以沿着所述径向排列的方式收纳于所述导体槽内且与所述铁芯隔着所述片状绝缘体，所述导体部被所述槽楔的中央部支撑。
在另一种可选的方案中，所述铁芯包括位于所述导体槽的径向开口处的抵靠部，所述槽楔在所述径向上抵靠于所述抵靠部，并且在所述径向上位于所述抵靠部和所述导体部之间。
通过采用上述技术方案，本发明提供了一种新型的定子组件用槽楔及包括该槽楔的定子组件。该槽楔在宽度方向上包括中央部和位于中央部的宽度方向外侧的宽度方向端部。宽度方向端部形成有凹槽，凹槽朝向高度方向一侧开放且朝向高度方向另一侧凹陷，凹槽还沿着长度方向直线状地延伸，特别地贯通槽楔。在槽楔安装到铁芯的导体槽的状态下，中央部用于支撑导体槽内的导体部且凹槽用于收纳位于导体槽内的片状绝缘体(例如绝缘纸)的径向内侧端部。
这样，由于片状绝缘体的一部分插入槽楔的凹槽中，因而一方面能够保证在槽楔插入导体槽的过程中片状绝缘体与槽楔不发生干涉，从而减小了插入槽楔时的作用力并保证了槽楔的顺利插入导体槽中，另一方面与背景技术相比能够确保在片状绝缘体与槽楔之间的重叠部位处形成足够的爬电距离，进而改善铁芯与导体部之间的绝缘性能。
附图说明
图1A示出了一种电机用定子组件的部分组装过程，其中导体部沿着箭头的方向被插入铁芯的导体槽。
图1B是示出了利用图1A中的组装过程组装的电机用定子组件的局部示意图，其中槽楔与绝缘纸处于理想的装配状态。
图1C是示出了利用图1A中的组装过程组装的电机用定子组件的局部示意图，其中槽楔与绝缘纸的端部之间存在间隔。
图2A是示出了根据本发明的一实施例的电机用定子组件用槽楔的立体示意图。
图2B是示出了图2A中的槽楔的包括长度方向端部的局部结构示意图。
图3A是示出了根据本发明的一实施例的电机用定子组件的局部结构示意图。
图3B是示出了图3A中的电机用定子组件的局部结构示意图，其中铁芯的导体槽中未安装其它部件。
图3C是示出了图3A中的电机用定子组件的局部结构示意图，其中铁芯的导体槽中已经安装了绝缘纸。
图3D是示出了图3A中的电机用定子组件的局部结构示意图，其中铁芯的导体槽中已经安装了绝缘纸、导体部和图2A中所示的槽楔。
图3E是示出了图3D中的局部结构的放大示意图。
附图标记说明
10铁芯 10h导体槽 20绝缘纸 30导体部 40槽楔 G间隔
1槽楔 1m中央部 1s支撑面 1e宽度方向端部 1c凹槽 1c1恒宽部 1c2渐宽部 2铁芯 2h导体槽 21铁芯齿部 211抵靠部 212槽楔安装部 3绝缘纸 31贴附部 32径向内侧端部 4导体部
L长度方向 W宽度方向 H高度方向。
具体实施方式
以下将结合说明书附图详细说明本申请的具体实施例。应当理解，这些具体的说明仅用于示教本领域技术人员如何实施本申请，而不用于穷举本申请的所有可行的方式，也不用于限制本申请的范围。
需要说明的是，如无特殊说明，在本发明中，“长度方向”、“宽度方向”和“高度方向”分别是指槽楔的长度方向、宽度方向和高度方向，“宽度方向外侧”是指在宽度方向上远离槽楔的沿着高度方向和长度方向延展的中心面的那侧，即宽度方向两端侧，“宽度方向内侧”是指在宽度方向上接近槽楔的沿着高度方向和长度方向延展的中心面的那侧，即宽度方向中心侧；“长度方向外侧”是指在长度方向上远离槽楔的沿着高度方向和宽度方向延展的 中心面的那侧，即长度方向两端侧，“长度方向内侧”是指在长度方向上接近槽楔的沿着高度方向和宽度方向延展的中心面的那侧，即长度方向中心侧；“轴向”、“径向”和“周向”分别是指电机用定子组件(铁芯)的轴向、径向和周向。
下面将结合说明书附图说明根据本发明的一实施例的定子组件用槽楔的结构。
(槽楔的结构)
如图2A和图2B所示，根据本发明的一实施例的定子组件用槽楔1用于安装于定子组件的铁芯2的导体槽2h中。该槽楔1形成为直杆状并且具有彼此正交的长度方向L、宽度方向W和高度方向H。在本实施例中，在槽楔1的任意横截面中，槽楔1具有相对于沿着高度方向H延伸的宽度方向中心线对称的形状，也就是说槽楔1具有相对于其沿着高度方向H和长度方向L延展的中心面成镜像对称的结构。进一步地，槽楔1的外轮廓在整个长度方向L上均相同。在宽度方向W上，槽楔1包括中央部1m和位于中央部1m的宽度方向外侧的两个宽度方向端部1e。
在本实施例中，如图2A和图2B所示，中央部1m的在高度方向一侧的表面形成为平坦的支撑面1s。在槽楔1插入导体槽2h的下述槽楔安装部212的状态下，中央部1m的支撑面1s与导体槽2h中的导体部4相对并且用于支撑导体部4。
在本实施例中，如图2A和图2B所示，宽度方向端部1e形成为从中央部1m起高度朝向宽度方向外侧逐渐减小的形状。各宽度方向端部1e形成有一个凹槽1c。凹槽1c朝向高度方向一侧开放且朝向高度方向另一侧凹陷，凹槽1c沿着长度方向L直线状地延伸，特别地贯通槽楔1。凹槽1c沿着高度方向H延伸预定的深度，使得在槽楔1插入导体槽2h的状态下，绝缘纸3的径向内侧端 部32与凹槽1c的底部具有间隔。这样，在槽楔1插入导体槽2h的过程中，槽楔1不会与绝缘纸3发生干涉。由此，如图3A和图3D所示，在槽楔1插入导体槽2h的过程中以及随后插入到位之后，凹槽1c都用于收纳位于导体槽2h内的绝缘纸3的径向内侧端部32。
在长度方向L上，每个凹槽1c包括彼此连通的恒宽部1c1和渐宽部1c2。恒宽部1c1在长度方向L上具有始终相同的宽度。渐宽部1c2位于恒宽部1c1的长度方向外侧，渐宽部1c2的宽度从恒宽部1c1朝向长度方向外侧逐渐变宽。具体地，用于形成渐宽部1c2的宽度方向内侧壁以相对于长度方向具有较大的倾斜角度地倾斜延伸，用于形成渐宽部1c2的宽度方向外侧壁以相对于长度方向L具有较小的倾斜角度地倾斜延伸，由此实现渐宽部1c2具有逐渐变宽的形状。在槽楔1开始插入导体槽2h的初始阶段，渐宽部1c2能够起到将绝缘纸3的径向内侧端部32顺利引导到恒宽部1c1的作用。
以下说明包括上述槽楔1的电机用定子组件的结构。
(电机用定子组件的结构)
如图3A、图3D和图3E所示，根据本发明的一实施例的电机用定子组件包括上述的槽楔1、铁芯2、绝缘纸3和导体部4。
具体地，在本实施例中，如图3A至图3D所示，铁芯2的结构包括筒状的铁芯主体部和从铁芯主体部朝向径向内侧突出的多个铁芯齿部21，各铁芯齿部21具有相同的形状和尺寸。在周向上，相邻的每两个铁芯齿部21之间均形成沿着径向延伸的一个导体槽2h。由于多个铁芯齿部21在周向上是均匀分布的，因此多个导体槽2h在周向上也是均匀分布的。
进一步地，如图3B至图3E所示，各铁芯齿部21的位于导体槽2h的径向开口处的部分形成燕尾形状，由此相邻的铁芯齿部21的燕尾形状形成用于与槽楔1对应抵靠的抵靠部211。铁芯齿部21形成导体槽2h的侧壁，导体槽2h的侧 壁的靠近径向开口的一部分形成槽楔安装部212。槽楔安装部212在周向上的宽度大于导体槽2h的其它部分在周向上的宽度，并且槽楔安装部212的截面轮廓形状与槽楔1的宽度方向端部1e的外轮廓形状匹配。当绝缘纸3安装到位之后，如图3C所示，绝缘纸3的径向内侧端部32位于槽楔安装部212，这样，一方面，绝缘纸3的两个径向内侧端部32能够在周向上彼此远离，便于导体部4经由导体槽2h的径向开口插入导体槽2h的过程中不会导致绝缘纸3的径向内侧端部32卷起；另一方面，便于绝缘纸3的径向内侧端部32插入槽楔1的凹槽1c中，使得槽楔1在该槽楔安装部212处沿着轴向顺利插入导体槽2h。
在本实施例中，如图3C所示，绝缘纸3包括以贴附导体槽2h的周壁的方式安装于导体槽2h的贴附部31以及伸入到槽楔安装部212处的径向内侧端部32。如图3A、图3D和图3E所示，多个导体部4与铁芯2之间隔着绝缘纸3的贴附部31，利用绝缘纸3的贴附部31作为导体部4与铁芯2之间的补充绝缘。绝缘纸3的径向内侧端部32与导体槽2h的侧壁分离并且伸入槽楔1的凹槽1c中，从而有效延长绝缘纸3和槽楔1的重叠部位形成的爬电距离。进一步地，绝缘纸3的径向内侧端部与槽楔1的凹槽1c的底部之间形成预定的间隙，这样在槽楔1插入导体槽2h的过程中不会与绝缘纸3发生干涉，保证了槽楔1的顺利插入。
在本实施例中，如图3A、图3D和图3E所示，导体部4可以为波绕组。多个导体部4以沿着径向排列的方式收纳于导体槽2h内且与铁芯2隔着绝缘纸3的贴附部32。利用由导体部4之间相互作用产生的对槽楔1的压力，在径向上槽楔1介于导体部4和抵靠部211之间，使得槽楔1的宽度方向端部1e与铁芯2的抵靠部211抵靠在一起，从而防止导体部4从导体槽2h脱出。
以下说明定子组件的组装过程，该组装过程大致包括如下的步骤：
如图3C所示，在铁芯2的导体槽2h中收纳安装绝缘纸3；
如图3D和图3E所示，将多个导体部4从径向内侧经由导体槽2h的径向开 口顺序插入导体槽2h中，使得多个导体部4沿着径向布置；以及
在径向最内侧的导体部4的径向内侧的位置沿着轴向插入槽楔1，使得在绝缘纸3的径向内侧端32插入槽楔1的凹槽1c的状态下，槽楔1以其长度方向L沿着铁芯2的轴向、高度方向H沿着铁芯2的径向且宽度方向W大致沿着铁芯2的周向的方式安装于对应的导体槽2h的槽楔安装部212且抵靠于抵靠部211。槽楔1的中央部1m与径向最内侧的导体部4相对，当槽楔1插入到位之后，中央部1m的支撑面1s用于支撑导体部4。
当然，本发明不限于上述实施例说明的方案，本领域技术人员在本发明的教导下可以对本发明的上述实施例做出各种变型，而不脱离本发明的范围。以下进行补充说明。
i.在图1A至图1C所示的定子组件的结构中，不仅存在槽楔40与绝缘纸20的端部产生间隔G的情况，而且还可能存在槽楔40与绝缘纸20发生过分干涉导致槽楔40不能顺利插入导体槽10h的情况，这种情况不利于大规模生产。
相比之下，由于根据本发明的一实施例的槽楔1具有凹槽1c，绝缘纸3的径向内侧端部32插入凹槽1c中且与凹槽1c的底部具有间隔，因而最大程度地避免了槽楔1在沿着轴向插入导体槽2h的过程中与绝缘纸3发生过分干涉的情况，从而保证了槽楔1顺利插入导体槽2h中，有利于大规模生产。
ii.虽然在以上的实施例中以绝缘纸3作为片状绝缘体的示例进行说明，但是本发明不限于此，可以采用其它形式的片状绝缘体作为导体部4与铁芯2之间的补充绝缘。
iii.可以理解，槽楔1可以采用绝缘材料形成，而且可以根据需要改变绝缘材料的种类。进一步地，利用适当的材料以及槽楔1形成的凹槽1c，能够使得槽楔1具有一定的弹性，从而在槽楔1插入导体槽2h的过程中防止槽楔1与铁芯2发生碰撞而损坏。
iv.在槽楔1插入安装到导体槽2h的槽楔安装部212之后，槽楔1受到导体 部4的作用力而压抵于抵靠部211，从而槽楔1不会产生不期望的窜动，保证了整个定子组件的NVH性能。
v.虽然在以上的实施例中说明了导体槽2h具有朝向径向内侧开放的径向开口，但是本发明不限于此。导体槽2h可以不形成朝向径向内侧开放的径向开口，代替地形成有朝向径向外侧开放的径向开口，换言之，导体槽不是形成于铁芯的内周部，而是形成于铁芯的外周部。

Claims (10)

  1. 一种定子组件用槽楔，其用于安装于所述定子组件的铁芯(2)的导体槽(2h)中，所述槽楔(1)形成为直杆状并且具有彼此正交的长度方向(L)、宽度方向(W)和高度方向(H)，
    所述槽楔(1)在所述宽度方向(W)上包括中央部(1m)和宽度方向端部(1e)，所述宽度方向端部(1e)位于所述中央部(1m)的宽度方向外侧，所述宽度方向端部(1e)形成有凹槽(1c)，所述凹槽(1c)朝向高度方向一侧开放且朝向高度方向另一侧凹陷，所述凹槽(1c)沿着所述长度方向(L)直线状地延伸，
    在所述槽楔(1)安装于所述导体槽(2h)的状态下，所述中央部(1m)用于支撑所述导体槽(2h)内的导体部(4)，所述凹槽(1c)用于收纳所述导体槽(2h)内的片状绝缘体的径向内侧端部(32)。
  2. 根据权利要求1所述的定子组件用槽楔，其特征在于，每个所述凹槽(1c)在所述长度方向(L)上包括彼此连通的恒宽部(1c1)和渐宽部(1c2)，所述渐宽部(1c2)位于所述恒宽部(1c1)的长度方向外侧，所述渐宽部(1c2)的宽度从所述恒宽部(1c1)朝向长度方向外侧逐渐变宽。
  3. 根据权利要求2所述的定子组件用槽楔，其特征在于，用于形成所述渐宽部(1c2)的宽度方向内侧壁和/或宽度方向外侧壁相对于所述长度方向(L)倾斜地延伸。
  4. 根据权利要求2或3所述的定子组件用槽楔，其特征在于，在所述高度方向(H)上，所述凹槽(1c)的深度被构造成使得，在所述槽楔(1)安装于所述导体槽(2h)的状态下，所述片状绝缘体的径向内侧端部(32)与所述凹槽(1c)的底部具有间隔。
  5. 根据权利要求1至4中任一项所述的定子组件用槽楔，其特征在于，所述宽度方向端部(1e)形成为高度朝向宽度方向外侧逐渐减小的形状。
  6. 根据权利要求1至5中任一项所述的定子组件用槽楔，其特征在于，在所述槽楔(1)的任意横截面中，所述槽楔(1)具有相对于沿着所述高度方向(H)延伸的宽度方向中心线对称的形状。
  7. 一种定子组件，其包括权利要求1至6中任一项所述的定子组件用槽楔(1)。
  8. 根据权利要求7所述的定子组件，其特征在于，所述定子组件还包括铁芯(2)，所述铁芯(2)形成有多个沿着径向延伸的导体槽(2h)，所述导体槽(2h)的侧壁形成有槽楔安装部(212)，所述槽楔安装部(212)与所述槽楔(1)的宽度方向端部(1e)的形状匹配，
    所述槽楔(1)以所述长度方向(L)沿着所述铁芯(2)的轴向、所述高度方向(H)沿着所述铁芯(2)的径向且所述宽度方向(W)大致沿着所述铁芯(2)的周向的方式安装于对应的所述槽楔安装部(212)。
  9. 根据权利要求8所述的定子组件，其特征在于，所述定子组件还包括片状绝缘体和导体部(4)，所述片状绝缘体包括贴附所述导体槽(2h)的周壁的贴附部(31)和插入所述槽楔(1)的凹槽(1c)的径向内侧端部(32)，多个所述导体部(4)以沿着所述径向排列的方式收纳于所述导体槽(2h)内且与所述铁芯(2)隔着所述片状绝缘体(3)，所述导体部(4)被所述槽楔(1)的中央部(1m)支撑。
  10. 根据权利要求9所述的定子组件，其特征在于，所述铁芯(2)包括位于所述导体槽(2h)的径向开口处的抵靠部(211)，所述槽楔(1)在所述径向上抵靠于所述抵靠部(211)，并且在所述径向上位于所述抵靠部(211)和所述导体部(4)之间。
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US5359249A (en) * 1991-07-19 1994-10-25 Mitsubishi Denki Kabushiki Kaisha AC generator with tapered slots
JPH08214484A (ja) * 1995-11-14 1996-08-20 Toshiba Corp 偏平形電動機の固定子製造方法
CN102938592A (zh) * 2012-10-23 2013-02-20 陕西航空电气有限责任公司 一种加厚电机绕组槽绝缘及其加工方法
CN206834875U (zh) * 2017-06-29 2018-01-02 广东美芝精密制造有限公司 槽楔、定子组件和电机
CN207691544U (zh) * 2017-12-22 2018-08-03 佳木斯电机股份有限公司 低速直驱永磁同步电动机双层绕组左右分层的下线结构
CN208062900U (zh) * 2018-04-25 2018-11-06 广东美芝制冷设备有限公司 定子组件、电机和压缩机
WO2020192824A1 (de) * 2019-03-25 2020-10-01 Schaeffler Technologies AG & Co. KG Nutverschlusskeil und diesen verwendendes verfahren

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359249A (en) * 1991-07-19 1994-10-25 Mitsubishi Denki Kabushiki Kaisha AC generator with tapered slots
JPH08214484A (ja) * 1995-11-14 1996-08-20 Toshiba Corp 偏平形電動機の固定子製造方法
CN102938592A (zh) * 2012-10-23 2013-02-20 陕西航空电气有限责任公司 一种加厚电机绕组槽绝缘及其加工方法
CN206834875U (zh) * 2017-06-29 2018-01-02 广东美芝精密制造有限公司 槽楔、定子组件和电机
CN207691544U (zh) * 2017-12-22 2018-08-03 佳木斯电机股份有限公司 低速直驱永磁同步电动机双层绕组左右分层的下线结构
CN208062900U (zh) * 2018-04-25 2018-11-06 广东美芝制冷设备有限公司 定子组件、电机和压缩机
WO2020192824A1 (de) * 2019-03-25 2020-10-01 Schaeffler Technologies AG & Co. KG Nutverschlusskeil und diesen verwendendes verfahren

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