WO2022217437A1 - 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
WO2022217437A1
WO2022217437A1 PCT/CN2021/086661 CN2021086661W WO2022217437A1 WO 2022217437 A1 WO2022217437 A1 WO 2022217437A1 CN 2021086661 W CN2021086661 W CN 2021086661W WO 2022217437 A1 WO2022217437 A1 WO 2022217437A1
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WO
WIPO (PCT)
Prior art keywords
conductor
slot wedge
slot
stator assembly
iron core
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PCT/CN2021/086661
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English (en)
French (fr)
Inventor
李至浩
梁杰
舒森
Original Assignee
舍弗勒技术股份两合公司
李至浩
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Application filed by 舍弗勒技术股份两合公司, 李至浩 filed Critical 舍弗勒技术股份两合公司
Priority to PCT/CN2021/086661 priority Critical patent/WO2022217437A1/zh
Publication of WO2022217437A1 publication Critical patent/WO2022217437A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—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
    • H02K3/46—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

Definitions

  • the present 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 (such as the 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 from coming out of the conductor slot through the radial opening, and the slot wedge can also improve the gap between the core and the conductor. insulation properties.
  • the iron core 10 of the stator assembly is formed with a plurality of conductor slots 10h that open toward the radially inner side, and the insulating paper 20 is installed in each conductor slot 10h by adhering to the peripheral wall of each conductor slot 10h , the conductor 30 (eg, the wave winding) is passed through the radial opening of the conductor slot 10h from the radially inner side to be inserted into the conductor slot 10h (as indicated by the arrow in FIG. 1A ).
  • the insulating paper 20 can prevent the conductor 30 from being damaged during the insertion of the conductor 30 .
  • the insulating paper 20 can provide supplementary insulation between the conductor 30 and the iron core 10 .
  • the width of the radial opening of the conductor slot 10h is larger than the width of the conductor 30. Therefore, after the conductor 30 is inserted into the conductor slot 10h, the conductor 30 has the risk of falling out of the conductor slot 10h. Furthermore, as shown in FIG. 1B , after a predetermined number of conductors 30 have been accommodated and installed in each conductor slot 10h, slot wedges 40 are installed at the radial openings of the conductor slots 10h to prevent the conductors 30 from coming out of the conductor slots 10h.
  • An object of the present invention is to provide a slot wedge for a stator assembly, which can separate a part of a sheet-like insulator (eg insulating paper) from a side wall of the conductor slot after the slot wedge is installed in the conductor slot of the iron core of the stator assembly,
  • the slot wedge is kept in contact with the sheet insulator, so that the slot wedge can be smoothly inserted into the conductor slot without reducing the size of the insulating paper, and it can also avoid the iron core and the conductor due to insufficient creepage distance described in the background art.
  • Another object of the present invention is to provide a stator assembly including the above slot wedge.
  • the present invention provides the following 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, a width direction and a height direction orthogonal to each other,
  • Both sides in the width direction of the slot wedge are formed with raised portions for raising the ends of the sheet-like insulators from the side walls of the conductor slots and keeping them in contact with the sheet-like insulators. state, the raised portion extends continuously along the longitudinal direction, and
  • the portion of the slot wedge on the inner side in the width direction with respect to the raised portion is formed with a concave portion that is open toward one side in the height direction and accommodates the raised end portion of the sheet insulator.
  • the raised portion gradually decreases in width while protruding toward one side in the height direction.
  • a portion of the slot wedge between the two raised portions is formed with a support portion protruding toward one side in the height direction, the support portion protruding more than The position of the raised portion on one side in the height direction is used to support the conductor accommodated in the conductor groove.
  • the support portion is provided at a central position between the two raised portions, and formed between the support portion and the raised portions located on both sides of the support portion. the recess.
  • abutting portions are further formed on both sides in the width direction of the slot wedge, and the abutting portions are located on the other side in the height direction relative to the corresponding raised portion.
  • the contour line of the abutting portion on the other side in the height direction is formed to extend toward the other side in the height direction while facing the width. It extends obliquely inward.
  • the slot wedge includes a tapered portion located at both ends of the slot wedge along the lengthwise direction and a main body portion located between the two tapered portions, and the raised portion at least formed on the main body.
  • the present invention 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 conductor slots extending in the radial direction and slot wedges located at the radial openings of the conductor slots, and the slot wedges are along the axial direction of the iron core in the length direction. and 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 and is mounted on the corresponding conductor slot and abuts against the slot wedge portion.
  • stator assembly further comprises sheet insulators and conductors,
  • the sheet-like insulator includes an attaching portion to which a peripheral wall of the conductor slot is attached, and a lifted portion that is separated from the side wall of the conductor slot, and a plurality of the conductors are accommodated in the radial direction.
  • the raised portion of the slot wedge causes the raised portion to lift up from the side wall of the conductor slot and is held in contact with the In a state contacted by the raised portion, the support portion of the slot wedge supports the conductor, and the slot wedge is positioned between the slot wedge portion and the conductor in the radial direction.
  • the side wall of the conductor slot includes involute portions gradually moving away from each other in the process of extending toward the radial opening of the conductor slot, and the raised portion is located in the involute portion.
  • the widthwise outer sidewall of the raised portion matches the shape of the involute portion.
  • the conductor is a wave winding.
  • the present invention provides a novel slot wedge for a stator assembly and a stator assembly including the slot wedge.
  • the raised portion of the slot wedge can lift the end portion of the sheet insulator from the side wall of the conductor slot and keep in contact with the end portion of the sheet insulator state, so that the slot wedge can be smoothly inserted into the conductor slot without reducing the size of the insulating paper, and the interval between the end of the sheet insulator and the slot wedge described in the background art is also eliminated, ensuring that the sheet insulator A sufficient creepage distance is formed at the junction between the end of the iron core and the slot wedge, thereby ensuring the insulation performance between the iron core and the conductor.
  • FIG. 1A shows a partial assembly process of a stator assembly for a motor, in which conductors are inserted into conductor slots of an iron core in the direction of the arrow.
  • FIG. 1B is a partial schematic view showing a stator assembly for a motor assembled using the assembly process in FIG. 1A , wherein the slot wedge and the insulating paper are in an ideal assembled state.
  • FIG. 1C is a partial schematic view showing a stator assembly for a motor assembled using the assembly process of FIG. 1A , wherein the size of the insulating paper is reduced so that there is a space between the slot wedges and the ends of the insulating paper.
  • FIG. 2A is a schematic perspective view showing a slot wedge for a stator assembly according to an embodiment of the present invention.
  • Fig. 2B is a schematic diagram showing the slot wedge of Fig. 2a viewed in the length direction.
  • FIG. 3A is a schematic diagram showing a partial structure of an iron core of a stator assembly according to an embodiment of the present invention.
  • FIG. 3B is a partial schematic diagram showing a stator assembly according to an embodiment of the present invention, wherein a conductor slot has been installed with a plurality of conductors and the slot wedge shown in FIG. 2A .
  • width direction refers to the length direction, width direction and height direction of the slot wedge, respectively
  • the “outside of the width direction” is the Refers to the side away from the width direction centerline of the slot wedge
  • width direction inner side refers to the side close to the width direction centerline of the slot wedge
  • height direction side refers to the upper side in Fig. 2B
  • height direction other side refers to the lower side in Figure 2B
  • axial refers to the axial, radial and circumferential directions of the stator assembly (iron core) for a motor, respectively.
  • a slot wedge 1 for a stator assembly is used for mounting in a conductor slot of an iron core of a stator assembly.
  • the slot wedge 1 is formed in a straight rod shape and the slot wedge 1 has a length direction L, a width direction W and a height direction H which are orthogonal to each other.
  • the slot wedge 1 includes tapered portions 1e located at both ends thereof in the longitudinal direction and having a tapered cross-sectional area along the longitudinal direction L, and a main portion 1m positioned between the two tapered portions 1e.
  • the shape and area of the cross section of the main body portion 1 m are always the same in the longitudinal direction L.
  • the shape and area of the cross-section of the portion of the tapered portion 1e where the following support portion 12 is provided are respectively the same as those of the portion of the main body portion 1m where the support portion 12 is provided, and the other portions of the tapered portion 1e have the same cross-sectional shape and area.
  • the shape of the cross section is substantially the same as that of the other part of the main body part 1m, but the area of the cross section of the other part of the tapered part 1e gradually decreases from the main body part 1m.
  • the tapered portion 1e functions to facilitate the smooth insertion of the slot wedge 1 into the conductor slot in the axial direction.
  • the length of the main body portion 1m is much larger than the length of the tapered portion 1e, so that the raised portion 11 and the abutting portion 13 provided on the main body portion 1m have sufficient lengths.
  • a lift for lifting the end portion of the insulating paper from the side wall of the conductor groove of the iron core is formed in the portion on the side in the height direction of the main body portion 1 m of the slot wedge 1 .
  • the raised portion 11 extends continuously along the longitudinal direction L over the entire body portion 1 m.
  • the raised portion 11 protrudes toward one side in the height direction while the width gradually decreases, so that the tip portion of the raised portion 11 on the side in the height direction is formed in a tapered shape so that the end portion of the insulating paper and the conductor of the iron core are easily formed.
  • the side walls of the slot are separated.
  • the widthwise outer sidewall of the raised portion 11 and the side wall of the conductor slot (described below) involute) to match the shape.
  • abutting portions 13 are further formed on both sides in the width direction of the slot wedge 1 , and the abutting portions 13 are located higher than the corresponding raised portion 11 .
  • the contact portion 13 and the raised portion 11 are formed continuously in the height direction H.
  • the abutting portion 13 protrudes toward the outer side in the width direction so as to protrude more than
  • the contour line of the abutting portion 13 on the other side in the height direction is formed to face the other side in the height direction. While extending laterally, it extends linearly obliquely inward in the width direction.
  • the support portion 12 protruding toward the height direction side is formed in the central portion of the slot wedge 1 between the two raised portions 11 .
  • the support portion 12 protrudes to a position on one side in the height direction rather than the raised portion 11 , and the support portion 12 extends over the entire wedge 1 in the longitudinal direction L.
  • the support portion 12 is provided at a central position between the two raised portions 11 , and the width of the support portion 12 gradually increases from one side in the height direction to the other side in the height direction.
  • the support portion 12 is located on the inner side of the raised portion 11 in the width direction, and the two raised portions 11 are separated by the support portion 12 , so that the support portion 12 and the raised portions 11 located on both sides thereof form a height direction.
  • the concave portion 1c which is open on the side and is recessed toward the other side in the height direction, is located on the inner side in the width direction with respect to the raised portion 11 and accommodates the raised portion of the insulating paper.
  • the size of the slot wedge 1 in the width direction is slightly smaller than the width of the corresponding part of the conductor slot, so that the slot wedge 1 can be smoothly inserted into the conductor slot along the axial direction. without interfering with the insulating paper.
  • stator assembly including the slot wedge 1 described above will be described below.
  • a stator assembly includes the above-mentioned slot wedge 1 , an iron core 2 , an insulating paper 3 and a conductor 4 .
  • the structure of the iron core 2 includes a cylindrical iron core main body portion and a plurality of iron core tooth portions 21 protruding radially inward from the iron core main body portion, and each iron core tooth portion 21 has the same shape and size.
  • one conductor slot 2h extending in the radial direction is formed between every two adjacent core teeth 21 . Since the plurality of core teeth 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 located at the radial opening of the conductor slot 2h is formed into a dovetail shape, whereby the dovetail shape of the adjacent iron core tooth portion 21 forms a slot for corresponding abutment with the slot wedge 1 .
  • Wedge 211 .
  • the iron core teeth 21 form the side walls of the conductor slot 2h, and a part of the side wall of the conductor slot 2h close to the radial opening is formed in the circumferential direction of the iron core 2 (corresponding to the radial opening of the conductor slot 2h) in the process of extending toward the radial opening of the conductor slot 2h.
  • the involute portions 212 are gradually separated from each other in the width direction W) of the slot wedge 1 .
  • the end of the insulating paper 3 is located in the involute portion 212, so that on the one hand, the conductor 4 is inserted into the conductor slot 2h through the radial opening of the conductor slot 2h without causing the end of the insulating paper 3 to be rolled up, and on the other hand, it is convenient
  • the slot wedge 1 is smoothly inserted into the conductor slot 2h along the axial direction at the involute portion 212 .
  • the insulating paper 3 includes an attaching portion 31 attached to the conductor slot 2h so as to be attached to the peripheral wall of the conductor slot 2h, a lifted portion 32 lifted by the slot wedge 1, a plurality of conductors 4 and iron
  • the sticking portion 31 of the insulating paper 3 is spaced between the cores 2 , and the sticking portion 31 of the insulating paper 3 is used as a supplementary insulation between the conductor 4 and the iron core 2 .
  • the lifted portion 3 of the insulating paper 3 is separated from the side wall of the conductor slot 2h, the lifted portion 3 of the insulating paper 3 is still in contact with the end portion on the height direction side of the lifted portion 11 of the slot wedge 1, so that The creepage distance formed by the insulating paper 3 and the raised portion 11 is effectively extended. Further, after the slot wedge 1 is installed in place, a predetermined gap can be formed between the widthwise outer side wall of the raised portion 11 of the slot wedge 1 and the side wall of the conductor slot 2h, which is also beneficial to prolong the creepage distance.
  • the conductor 4 may be a wave winding.
  • the plurality of conductors 4 are accommodated in the conductor groove 2h so as to be arranged in a radial direction, and the sticking portion 32 of the insulating paper 3 is interposed from the iron core 2 .
  • the slot wedge 1 is interposed between the conductor 4 and the slot wedge portion 211 in the radial direction, so that the abutting portion 13 of the slot wedge 1 and the slot of the iron core 2
  • the wedges 211 abut together, thereby preventing the conductor 4 from coming out of the conductor slot 2h.
  • the insulating paper 3 is stored and installed in the conductor groove 2h of the iron core 2;
  • the plurality of conductors 4 are sequentially inserted into the conductor slot 2h from the radially inner side through the radial opening of the conductor slot 2h, so that the plurality of conductors 4 are arranged in the radial direction;
  • the slot wedge 1 is inserted along the axial direction at a position radially inward of the radially innermost conductor 4 so that the slot wedge 1 has its length direction L along the axial direction of the iron core 2 and the height direction H along the iron core 2
  • the radial direction and the width direction W are substantially along the circumferential direction of the iron core 2 and are mounted on the corresponding conductor slots 2 h and abut against the slot wedge portion 211 , so that the support portion 12 of the slot wedge 1 is connected to the radially innermost conductor 4 .
  • the raised portion 11 of the slot wedge 1 further makes the end of the insulating paper 3 (the raised portion 32 ) raised from the side wall of the conductor slot 2h and interposed between the support portion 12 and the raised portion 11 , especially It is attached to the raised portion 11 , and the contact portion 13 of the slot wedge 1 is in contact with the slot wedge portion 211 of the iron core 2 .
  • the slot wedge 1 since the slot wedge 1 according to an embodiment of the present invention has the tapered portion 1e, the occurrence of the slot wedge 1 with the insulating paper 3 during the axial insertion into the conductor slot 2h is largely avoided In the case of excessive interference, the slot wedge 1 can be smoothly inserted into the conductor slot 2h, which is beneficial to mass production.
  • the insulating paper 3 is used as an example of the sheet-like insulator, but the present invention is not limited to this, and other forms of sheet-like insulators can be used as a supplement between the conductor 4 and the iron core 2. insulation.
  • the slot wedge 1 has a line-symmetric structure with respect to the center line in the width direction W.
  • the slot wedge 1 can be formed of insulating materials, and the types of insulating materials can be changed as required.
  • the conductor groove 2h has been described as having a radial opening that opens radially inward, but the present invention is not limited to this.
  • the conductor grooves 2h may not have radial openings that open radially inward, but may instead have radial openings that open radially outward.
  • the conductor grooves are not formed in the inner peripheral portion of the iron core, but are formed in the iron core of the periphery.

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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。该槽楔(1)形成为直杆状，槽楔(1)的宽度方向两侧部分形成有翘起部(11)，翘起部(11)用于使片状绝缘体(3)的端部从导体槽(2h)的侧壁翘起并与片状绝缘体(3)保持接触的状态。翘起部(11)沿着长度方向(L)连续地延伸。槽楔(1)的相对于翘起部(11)靠宽度方向内侧的部位形成朝向高度方向一侧开口的凹部(1c)，用于收纳片状绝缘体(3)翘起的端部。这样，不必减小片状绝缘体的尺寸就能够保证槽楔顺利插入导体槽中，而且还确保了足够的爬电距离，保证铁芯与导体之间的绝缘性能。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(例如波绕组)被插入导体槽之后，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，绝缘纸20以贴附各导体槽10h的周壁的方式安装于各导体槽10h中，使导体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30插入的过程中，绝缘纸20能够防止导体30受到损坏。并且，绝缘纸20能够在导体30和铁芯10之间提供补充绝缘。通常，为了确保导体30顺利插入导体槽10h，导体槽10h的径向开口宽度大于导体30的宽度，因而在导体30插入导体槽10h之后，导体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需要减小绝缘纸20的尺寸，使得槽楔40与绝缘纸20的端部之间存在如图1C所示的间隔G，来保证槽楔40能够顺利地插入导体槽10h而不会 与绝缘纸20发生干涉，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，在该槽楔安装于定子组件的铁芯的导体槽之后能够使片状绝缘体(例如绝缘纸)的一部分与导体槽的侧壁分离，槽楔保持与片状绝缘体接触状态，从而不必减小绝缘纸的尺寸就能够保证槽楔顺利插入导体槽中，而且还能够避免由于背景技术中所述的爬电距离不足导致铁芯与导体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，
所述槽楔的宽度方向两侧部分形成有翘起部，所述翘起部用于使片状绝缘体的端部从所述导体槽的侧壁翘起并与所述片状绝缘体保持接触的状态，所述翘起部沿着所述长度方向连续地延伸，并且
所述槽楔的相对于所述翘起部靠宽度方向内侧的部位形成朝向高度方向一侧开口的凹部，用于收纳所述片状绝缘体翘起的端部。
优选地，所述翘起部在朝向高度方向一侧凸出的同时宽度逐渐减小。
更优选地，在所述宽度方向上，所述槽楔的在两个所述翘起部之间的部分形成有朝向高度方向一侧凸出的支撑部，所述支撑部凸出到比所述翘起部 靠高度方向一侧的位置以用于支撑收纳于所述导体槽内的导体。
更优选地，在所述宽度方向上，所述支撑部设置于两个所述翘起部之间的中央位置，并且所述支撑部与位于其两侧的所述翘起部之间形成所述凹部。
更优选地，所述槽楔的宽度方向两侧部分还形成有抵接部，所述抵接部位于比对应的所述翘起部靠高度方向另一侧的位置。
更优选地，在沿着所述宽度方向和所述高度方向截取的横截面中，所述抵接部的所述高度方向另一侧的轮廓线形成为朝向高度方向另一侧延伸的同时朝向宽度方向内侧倾斜地延伸。
更优选地，所述槽楔包括位于其长度方向两端部的沿着所述长度方向渐缩的渐缩部以及位于两个所述渐缩部之间的主体部，所述翘起部至少形成于所述主体部。
本发明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。
优选地，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以及位于所述导体槽的径向开口处的槽楔部，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导体槽且抵接于所述槽楔部。
更优选地，所述定子组件还包括片状绝缘体和导体，
所述片状绝缘体包括贴附所述导体槽的周壁的贴附部和与所述导体槽的侧壁分离的被翘起部，多个所述导体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，所述槽楔的翘起部使所述被翘起部从所述导体槽的侧壁翘起并保持与所述被翘起部接触的状态，所述槽 楔的支撑部支撑所述导体，并且所述槽楔在所述径向上位于所述槽楔部和所述导体之间。
更优选地，所述导体槽的侧壁包括在朝向所述导体槽的径向开口延伸的过程中彼此逐渐远离的渐开部，所述翘起部位于所述渐开部。
更优选地，所述翘起部的宽度方向外侧壁与所述渐开部形状匹配。
更优选地，所述导体为波绕组。
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，该槽楔的宽度方向两侧部分形成有用于在与片状绝缘体接触的状态下使片状绝缘体的端部从导体槽的侧壁翘起的翘起部。这样，在槽楔安装于定子组件的铁芯的导体槽之后，槽楔的翘起部能够使该片状绝缘体的端部从导体槽的侧壁翘起并与片状绝缘体的端部保持接触状态，从而不必减小绝缘纸的尺寸就能够保证槽楔顺利插入导体槽中，而且还消除了背景技术中所述的片状绝缘体的端部与槽楔之间的间隔，确保在片状绝缘体的端部与槽楔之间的接合部位处形成足够的爬电距离，进而保证铁芯与导体之间的绝缘性能。
附图说明
图1A是示出了一种电机用定子组件的部分组装过程，其中导体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，其中减小了绝缘纸的尺寸，使得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方式的定子组件用槽楔的立体示意图。
图2B是示出了沿着长度方向观察的图2a中的槽楔的示意图。
图3A是示出了根据本发明的一实施方式的定子组件的铁芯的局部结构示意图。
图3B是示出了根据本发明的一实施方式的定子组件的局部示意图，其中一个导体槽已经安装有多个导体和图2A中所示的槽楔。
附图标记说明
10铁芯 10h导体槽 20绝缘纸 30导体 40槽楔 G间隔
1槽楔 1m主体部 1e渐缩部 11翘起部 12支撑部 13抵接部 2铁芯 2h导体槽 21铁芯齿部 211槽楔部 212渐开部 3绝缘纸 31贴附部 32被翘起部 4导体
L长度方向 W宽度方向 H高度方向。
具体实施方式
以下参照附图说明本发明的示例性实施方式。
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”是指远离槽楔的宽度方向中线的那侧，“宽度方向内侧”是指接近槽楔的宽度方向中线的那侧，“高度方向一侧”是指图2B中的上侧，“高度方向另一侧”是指图2B中的下侧；“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。
将结合说明书附图说明根据本发明的一实施方式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方式的定子组件用槽楔1用于 安装于定子组件的铁芯的导体槽中。该槽楔1形成为直杆状并且槽楔1具有彼此正交的长度方向L、宽度方向W和高度方向H。
在长度方向L上，槽楔1包括位于其长度方向两端部且横截面面积沿着长度方向L渐缩的渐缩部1e以及位于两个渐缩部1e之间的主体部1m。主体部1m的横截面的形状和面积在长度方向L上始终相同。渐缩部1e的设置下述支撑部12的部分的横截面的形状和面积分别与主体部1m的设置支撑部12的部分的横截面的形状和面积相同，渐缩部1e的其它部分的横截面的形状与主体部1m的其它部分的横截面的形状大致相同，但是渐缩部1e的其它部分的横截面的面积从主体部1m起逐渐减小。这样，渐缩部1e起到便于槽楔1沿着轴向顺利插入导体槽中的作用。另外，主体部1m的长度远大于渐缩部1e的长度，使得设置于主体部1m的翘起部11和抵接部13具有足够的长度。
在槽楔1的主体部1m的靠高度方向一侧的部分中，槽楔1的宽度方向两侧部分形成有用于使绝缘纸的端部从铁芯的导体槽的侧壁翘起的翘起部11。翘起部11沿着长度方向L连续地延伸遍及整个主体部1m。翘起部11在朝向高度方向一侧凸出的同时宽度逐渐减小，这样翘起部11的位于高度方向一侧的顶端部形成为渐缩形状易于使绝缘纸的端部与铁芯的导体槽的侧壁分离。为了使得翘起部11顺利使绝缘纸的端部翘起的同时不会在插入导体槽的过程中与铁芯发生干涉，翘起部11的宽度方向外侧壁与导体槽的侧壁(下述渐开部)的形状匹配。
在槽楔1的主体部1m的靠高度方向另一侧的部分中，槽楔1的宽度方向两侧部分还形成有抵接部13，抵接部13位于比对应的翘起部11靠高度方向另一侧的位置。抵接部13与翘起部11在高度方向H上连续地形成。为了保证抵接部13与下述的铁芯2的槽楔部211(如图3A所示)确实地抵接在一起，一方面，抵接部13朝向宽度方向外侧凸出以凸出到比翘起部11靠宽度方向外侧的 位置；另一方面，在沿着宽度方向W和高度方向H截取的横截面中，抵接部13的高度方向另一侧的轮廓线形成为朝向高度方向另一侧延伸的同时朝向宽度方向内侧倾斜地直线状延伸。
此外，在宽度方向W上，槽楔1的在两个翘起部11之间的中央部分形成有朝向高度方向一侧凸出的支撑部12。支撑部12凸出到比翘起部11靠高度方向一侧的位置，并且支撑部12在长度方向L上延伸遍及整个槽楔1。在宽度方向W上，支撑部12设置于两个翘起部11之间的中央位置，并且支撑部12的宽度从高度方向一侧朝向高度方向另一侧逐渐增大。这样，支撑部12位于翘起部11的宽度方向内侧且两个翘起部11被支撑部12分隔开，使得支撑部12与位于其两侧的翘起部11之间形成朝向高度方向一侧开口且朝向高度方向另一侧凹陷的凹部1c，该凹部1c相对于翘起部11位于靠宽度方向内侧的部位，以用于收纳绝缘纸翘起的部分。通过采用上述结构，支撑部12和两个翘起部11使得槽楔1的高度方向一侧的轮廓呈大致W字形。
这样，在槽楔1未受到导体的压力的自然状态下，槽楔1在宽度方向上的尺寸略小于导体槽的对应部位的宽度，从而便于槽楔1沿着轴向顺利地插入导体槽中而不会与绝缘纸发生干涉。在槽楔1插入收纳有多个导体(例如波绕组)的导体槽之后，多个导体之间的相互作用力将产生对槽楔1的压力，由于支撑部12能够支撑多个导体，因而使得压力经由支撑部12顺利传导到槽楔1的抵接部13。
以下说明包括上述槽楔1的定子组件的结构。
(定子组件的结构)
如图3A和图3B所示，根据本发明的一实施方式的定子组件包括上述的槽楔1、铁芯2、绝缘纸3和导体4。
具体地，在本实施方式中，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，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对应抵接的槽楔部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在朝向导体槽2h的径向开口延伸的过程中在铁芯2的周向(对应于槽楔1的宽度方向W)上彼此逐渐远离的渐开部212。绝缘纸3的端部位于渐开部212，这样，一方面便于导体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的端部卷起，另一方面便于槽楔1在该渐开部212处沿着轴向顺利插入导体槽2h。
在本实施方式中，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以及被槽楔1翘起的被翘起部32，多个导体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4与铁芯2之间的补充绝缘。虽然绝缘纸3的被翘起部3与导体槽2h的侧壁分离，但是绝缘纸3的被翘起部3仍然与槽楔1的翘起部11的高度方向一侧的端部接触，从而有效延长绝缘纸3和翘起部11形成的爬电距离。进一步地，在槽楔1安装到位之后，槽楔1的翘起部11的宽度方向外侧壁与导体槽2h的侧壁之间可以形成预定的间隙，这样也有利于延长爬电距离。
在本实施方式中，导体4可以为波绕组。多个导体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4和槽楔部211之间，使得槽楔1的抵接部13与铁芯2的槽楔部211抵接在一起，从而防止导体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：
在铁芯2的导体槽2h中收纳安装绝缘纸3；
将多个导体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4沿着径向布置；以及
在径向最内侧的导体4的径向内侧的位置沿着轴向插入槽楔1，使得槽楔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且抵接于槽楔部211，并且使得槽楔1的支撑部12与径向最内侧的导体4相对，进一步使得槽楔1的翘起部11使绝缘纸3的端部(被翘起部32)从导体槽2h的侧壁翘起且介于支撑部12和翘起部11之间，特别是贴附于翘起部11，槽楔1的抵接部13与铁芯2的槽楔部211抵接在一起。
当然，本发明不限于上述实施方式，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方式做出各种变型，而不脱离本发明的范围。另外，还需进行以下说明。
(i)在以上的内容中没有明确说明，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方式的槽楔1具有渐缩部1e，因而极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)虽然在以上的具体实施方式中以绝缘纸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4 与铁芯2之间的补充绝缘。
(iii)虽然在以上的具体实施方式中没有明确说明，但是可以理解，在以上的具体实施方式中，槽楔1具有相对于宽度方向W上的中线成线对称的结构。
(iv)虽然在以上的具体实施方式中没有明确说明，但是可以理解，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。
(v)虽然在以上的具体实施方式中说明了导体槽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 (13)

  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)的宽度方向两侧部分形成有翘起部(11)，所述翘起部(11)用于使片状绝缘体(3)的端部从所述导体槽(2h)的侧壁翘起并与所述片状绝缘体(3)保持接触的状态，所述翘起部(11)沿着所述长度方向(L)连续地延伸，并且
    所述槽楔(1)的相对于所述翘起部(11)靠宽度方向内侧的部位形成朝向高度方向一侧开口的凹部(1c)，用于收纳所述片状绝缘体(3)翘起的端部。
  2. 根据权利要求1所述的定子组件用槽楔，其特征在于，所述翘起部(11)在朝向高度方向一侧凸出的同时宽度逐渐减小。
  3. 根据权利要求1或2所述的定子组件用槽楔，其特征在于，在所述宽度方向(W)上，所述槽楔(1)的在两个所述翘起部(11)之间的部分形成有朝向高度方向一侧凸出的支撑部(12)，所述支撑部(12)凸出到比所述翘起部(11)靠高度方向一侧的位置以用于支撑收纳于所述导体槽(2h)内的导体(4)。
  4. 根据权利要求3所述的定子组件用槽楔，其特征在于，在所述宽度方向(W)上，所述支撑部(12)设置于两个所述翘起部(11)之间的中央位置，并且所述支撑部(12)与位于其两侧的所述翘起部(11)之间形成所述凹部(1c)。
  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，所述槽楔(1)的宽度方向两侧部分还形成有抵接部(13)，所述抵接部(13) 位于比对应的所述翘起部(11)靠高度方向另一侧的位置。
  6. 根据权利要求5所述的定子组件用槽楔，其特征在于，在沿着所述宽度方向(W)和所述高度方向(H)截取的横截面中，所述抵接部(13)的所述高度方向另一侧的轮廓线形成为朝向高度方向另一侧延伸的同时朝向宽度方向内侧倾斜地延伸。
  7. 根据权利要求1至6中任一项所述的定子组件用槽楔，其特征在于，所述槽楔(1)包括位于其长度方向(L)两端部的沿着所述长度方向(L)渐缩的渐缩部(1e)以及位于两个所述渐缩部(1e)之间的主体部(1m)，所述翘起部(11)至少形成于所述主体部(1m)。
  8. 一种定子组件，其包括权利要求1至7中任一项所述的定子组件用槽楔(1)。
  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铁芯(2)，
    所述铁芯(2)形成有多个沿着径向延伸的导体槽(2h)以及位于所述导体槽(2h)的径向开口处的槽楔部(211)，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导体槽(2h)且抵接于所述槽楔部(211)。
  10. 根据权利要求9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(3)和导体(4)，
    所述片状绝缘体(3)包括贴附所述导体槽(2h)的周壁的贴附部(31)和与所述导体槽(2h)的侧壁分离的被翘起部(32)，多个所述导体(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)，所述槽楔(1)的翘起部(11)使所述被翘起部(32) 从所述导体槽(2h)的侧壁翘起并保持与所述被翘起部(32)接触的状态，所述槽楔(1)的支撑部(12)支撑所述导体(4)，并且所述槽楔(1)在所述径向上位于所述槽楔部(211)和所述导体(4)之间。
  11. 根据权利要求10所述的定子组件，其特征在于，所述导体槽(2h)的侧壁包括在朝向所述导体槽(2h)的径向开口延伸的过程中彼此逐渐远离的渐开部(212)，所述翘起部(11)位于所述渐开部(212)。
  12. 根据权利要求11所述的定子组件，其特征在于，所述翘起部(11)的宽度方向(W)外侧壁与所述渐开部(212)形状匹配。
  13. 根据权利要求10至12中任一项所述的定子组件，其特征在于，所述导体(4)为波绕组。
PCT/CN2021/086661 2021-04-12 2021-04-12 定子组件用槽楔及定子组件 WO2022217437A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1947755A1 (de) * 2007-01-19 2008-07-23 ENGEL Elektroantriebe GmbH Stator einer elektrischen Maschine
CN101752931A (zh) * 2008-12-02 2010-06-23 哈米尔顿森德斯特兰德公司 减少涡流损失的发电机楔块
CN107431402A (zh) * 2015-03-24 2017-12-01 大众汽车有限公司 用于电机器的定子
JP2019062663A (ja) * 2017-09-27 2019-04-18 アイシン・エィ・ダブリュ株式会社 ステータおよびステータの製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1947755A1 (de) * 2007-01-19 2008-07-23 ENGEL Elektroantriebe GmbH Stator einer elektrischen Maschine
CN101752931A (zh) * 2008-12-02 2010-06-23 哈米尔顿森德斯特兰德公司 减少涡流损失的发电机楔块
CN107431402A (zh) * 2015-03-24 2017-12-01 大众汽车有限公司 用于电机器的定子
JP2019062663A (ja) * 2017-09-27 2019-04-18 アイシン・エィ・ダブリュ株式会社 ステータおよびステータの製造方法

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