WO2019062482A1 - 一种电机定子铁芯固定结构 - Google Patents

一种电机定子铁芯固定结构 Download PDF

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Publication number
WO2019062482A1
WO2019062482A1 PCT/CN2018/103858 CN2018103858W WO2019062482A1 WO 2019062482 A1 WO2019062482 A1 WO 2019062482A1 CN 2018103858 W CN2018103858 W CN 2018103858W WO 2019062482 A1 WO2019062482 A1 WO 2019062482A1
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Prior art keywords
base
transition piece
end cover
hole
iron core
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PCT/CN2018/103858
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English (en)
French (fr)
Inventor
梁双全
龚天明
李华
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江苏中车电机有限公司
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Publication of WO2019062482A1 publication Critical patent/WO2019062482A1/zh

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    • 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
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures

Definitions

  • the invention belongs to the technical field of motor stator core, and more particularly relates to a stator core fixing structure of a motor.
  • the temperature rise of the motor is inevitable.
  • the motor has various cooling methods.
  • the heat jacket forming of the motor core and the base the heat of the iron core can only pass.
  • the base is radiated out. If a new assembly scheme is adopted, the selection of the cooling mode of the motor is increased, the temperature rise of the motor is effectively reduced, and the operational reliability of the motor is improved.
  • the iron core and the base are used in an interference fit or a transition fit, and the set is adopted by a hot sleeve process, and then further strengthened by a pin to prevent movement between the iron core and the base.
  • the assembly method has a large processing amount and a high processing precision, and the heat dissipation mode is limited, and the heat dissipation effect is limited.
  • An object of the present invention is to provide a fixed structure of a stator core of a motor having high machining accuracy and high heat dissipation efficiency.
  • a fixing structure for a stator core of an electric motor comprising a core, a transition piece, an end cover and a base, the transition piece being fixedly coupled to the iron core, the transition piece passing through a bolt Connecting with the end cover, the end cover is disposed perpendicular to the transition piece, the end cover is connected to an end of the base and covers an end surface of the base, the iron core and the base Parallelly disposed, a space for accommodating the cooling member is disposed between the iron core and the base.
  • the invention adopts axial assembly as a whole, firstly, the iron core and the transition piece are welded, the machining volume of the outer core of the iron core is reduced, the processing precision is high and the cost is low; the iron core with the transition piece is assembled with the end cover, and is fixed by bolts. At this time, only the outer circle of the transition piece and the positioning groove on the end cover can be processed, and the processing amount is greatly reduced; the above structure can provide a space between the iron core and the base to provide a space for cooling the iron core, such as Cold water, air cooling, etc.
  • the base extends a connecting plate toward a center thereof, and the connecting plate is disposed perpendicular to the base. This facilitates the fabrication of the web and the connection of the web to the end cap.
  • the periphery of the end cap is provided with a stepped groove facing the inside of the housing, and the stepped groove is matched with the connecting plate.
  • the end cap with the iron core is assembled with the base, and the base and the end cover are matched by the step groove to ensure the assembly positioning.
  • the stepped groove is provided with a first threaded through hole
  • the connecting plate is provided with a second threaded through hole
  • the end cover is connected with the base by a first bolt
  • the first A screw of the bolt is sequentially screwed into the first threaded through hole and the second threaded through hole
  • an end of the screw of the first bolt is flush with a side of the connecting plate facing the inside of the base.
  • the bolts are bolted into the threaded holes in a relatively secure manner.
  • the end cap is provided with a transition piece fitting hole toward one side of the housing.
  • one end of the transition piece is welded to the core, and the other end of the transition piece is mounted in the transition piece fitting hole and fixedly connected by a second bolt. This increases the coil end space and core strength.
  • the end cap is provided with a third threaded through hole, the third threaded through hole is in communication with the transition piece fitting hole, and the transition piece is installed in the transition piece fitting hole
  • One end is provided with a threaded blind hole, and the screw of the second bolt is sequentially screwed into the third threaded hole, the transition piece fitting hole and the thread blind hole.
  • the bolts are bolted into the threaded holes in a relatively secure manner.
  • the end cap is integral with the base.
  • the end cover and the base can be replaced by castings, and the base and the end cover are integrally molded during the casting process; thereby making the end cover and the base more firmly connected, so that the iron core is more stable. Fixed to the base.
  • FIG. 1 is a schematic structural view of a fixing structure of a stator core of an electric motor according to an embodiment of the present invention.
  • Fig. 1 schematically shows a fixing structure of a stator core of an electric machine according to an embodiment of the present invention.
  • the stator core of the motor comprises a core 3, a transition piece 4, an end cover 2 and a base 1.
  • the transition piece 4 is fixedly connected to the iron core 3.
  • the transition piece 4 is connected to the end cap 2 by bolts.
  • the end cap 2 is arranged perpendicular to the transition piece 4.
  • the end cap 2 is disposed perpendicular to the base 1.
  • the end cap 2 is connected to the end of the base 1 and covers the end face of the base 1.
  • the iron core 3 is located in the machine base 1, and the iron core 3 is disposed in parallel with the machine base 1. A space for accommodating the cooling member is provided between the iron core 3 and the base 1.
  • the end of the base 1 has a connecting plate 11 extending in the center thereof, and the connecting plate 11 is disposed perpendicular to the side wall of the base 1. This facilitates the production of the connecting plate 11 and the connection of the base 1 to the end cover 2.
  • the connecting plate 11 and the base 1 are integrated, which facilitates the manufacture of the connecting plate 11, and the fastness of the connecting plate is high.
  • the one end of the end cover 2 facing the outer side of the machine base 1 is a flat surface, and the end cover 2 is provided with a stepped groove around the inner side of the inner side of the machine base 1.
  • the step groove faces the inside of the base 1.
  • the thickness of the end cap 2 at the stepped groove is smaller than the thickness of other portions of the end cap 2.
  • the step groove is attached to the connecting plate and fixed by bolts.
  • the stepped groove portion is provided with a first threaded through hole
  • the connecting plate is provided with a second threaded through hole.
  • the rod portion of the first bolt 51 sequentially passes through the first threaded through hole on the stepped groove portion of the end cover 2 and the second threaded through hole of the connecting plate on the machine base 1 to fix the end cover 2 and the base.
  • the end of the rod portion of the first screw 51 is flush with the one of the connecting plate 11 facing the inside of the base 1.
  • the head of the first bolt 51 is located on the flat end surface of the end cover 2 facing the outside of the base 1 to ensure the motor stator. The normal operation of the fixed structure of the iron core.
  • a transition piece fitting hole 21 is provided in a middle portion of one side of the end cover 2 where the step groove is provided.
  • One end of the transition piece 4 is fixedly connected to the iron core 3. Specifically, the iron core 3 is welded to the transition piece 4. Thereby, the coil end space and the strength of the core 3 are increased.
  • the other end of the transition piece 4 is mounted in the transition piece fitting hole 21.
  • One end portion of the transition piece 4 mounted in the transition piece fitting hole 21 is provided with a threaded blind hole.
  • a third threaded through hole is provided in the middle of the end cover 2. The position of the threaded blind hole corresponds to the position of the third threaded through hole. The third threaded through hole is in communication with the threaded blind hole.
  • the transition piece 4 is connected to the end cap 2 by bolts. Specifically, the second bolt 52 passes through the third threaded hole in the middle of the end cover 2 and is then inserted into the thread blind hole, thereby fixing the end cover 2 and the transition piece 4 fixedly, so that the iron core 3 and the base 1 are arranged in parallel
  • the end cover 2 is vertically disposed with the transition piece 4 to ensure the normal operation of the iron core.
  • the inner side of the end cover 2 is provided with a stepped groove, and the connecting ring of the inner side of the base 1 is attached to the step groove and fixedly connected by bolts.
  • the end cover 2 with the iron core 3 is further assembled with the machine base 1, and the machine base 1 and the end cover 2 are matched by the step grooves to ensure the assembly positioning.
  • the end cap 2 and the base 1 are of unitary structure.
  • the end cover 2 and the base 1 can be replaced by castings, and the base 1 and the end cover 2 are integrally molded during the casting process; thereby making the end cover 2 and the base 1 more rigidly connected,
  • the iron core 3 is more firmly fixed to the base 1.
  • the iron core 3 is located in the base 1, and the iron core 3 is disposed in parallel with the base 1, and a space for accommodating the cooling member is disposed between the iron core 3 and the base 1.
  • the invention adopts axial assembly as a whole, firstly, the iron core 3 and the transition piece 4 are welded, so that the outer core processing amount of the iron core 3 is reduced, the processing precision is high and the cost is low; the iron core 3 with the transition piece 4 and the end cover 2 are The assembly is fixed by bolts. At this time, only the outer circle of the transition piece 4 and the positioning groove on the end cover 2 plate can be processed, and the processing amount is greatly reduced; the above structure can provide space between the iron core 3 and the base 1.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

一种电机定子铁芯的固定结构，包括铁芯3、过渡件4、端盖2和机座1，过渡件4与铁芯3固定连接，过渡件4通过螺栓52与端盖2连接，端盖2与过渡件4垂直设置，端盖2与机座1的端部连接，铁芯3与机座1平行设置，铁芯3与机座1之间设有用于容纳冷却部件的空间。整体采用轴向装配，铁芯3与过渡件4焊接，使铁芯3外圆加工量减少，加工精度较高且成本较低；将带过渡件4的铁芯3与端盖2装配，经螺栓52固定，只需加工过渡件4的外圆及端盖2板上的定位槽即可，加工量大大减少；这一结构使铁芯3与机座1之间能够提供空间排布冷却铁芯的冷却器。

Description

一种电机定子铁芯固定结构 技术领域
本发明属于电机定子铁芯技术领域，更具体涉及一种电机定子铁芯固定结构。
背景技术
目前电机铁芯与基座的配合大多采用过渡配合，需要机座与铁芯配合面的加工精度很高，另外还要采用热套的方式实现装配，为了防止铁芯与机座间的移动需采用销钉的方式，又需要现场配钻孔，装配工艺过程比较复杂、繁琐，夏天烘炉温度高工作人员的工作环境较为恶劣。
电机的温升不可避免，为有效降低电机的温升，提高电机绝缘可靠性，目前电机有各种不同的冷却方式，对于电机铁芯与机座的热套成型，铁芯的热量只能通过机座传导散出去。如果采用新的装配方案，增加了电机的冷却方式的选择，有效降低电机的温升，提高电机的运行可靠性。
通常采用铁芯与机座过盈配合或过渡配合的方式，通过热套的工艺方法进行套装，再通过销钉进一步加强，防止铁芯与机座间的移动。但这种装配方式配合面的加工量大，加工精度要求较高，并且散热方式选择有限，散热效果受到局限。
发明内容
本发明的目的是提供一种加工精度高且可散热效率较高的电机定子铁芯的固定结构。
根据本发明的一个方面，提供了一种电机定子铁芯的固定结构，包括铁芯、过渡件、端盖和机座，所述过渡件与所述铁芯固定连接，所述过渡件通过螺栓与所述端盖连接，所述端盖与所述过渡件垂直设置，所述端盖与所述机座的端部连接且覆盖所述机座的端面，所述铁芯与所述机座平行设置，所述铁芯与所述机座之间设有用于容纳冷却部件的空间。
本发明整体采用轴向装配，首先铁芯与过渡件焊接，使铁芯外圆加工量减少， 加工精度较高且成本较低；将带过渡件的铁芯与端盖装配，经螺栓固定，此时只需要加工过渡件的外圆及端端盖上的定位槽即可，加工量大大减少；上述结构可以使铁芯与机座之间能够提供空间排布冷却铁芯的冷却器，如冷水、风冷等。
在一些实施方式中，所述机座向其中心方向延伸有连接板，所述连接板与所述机座垂直设置。由此便于连接板的制作和连接板与端盖的连接。
在一些实施方式中，所述端盖的周边设有朝向所述机座内的台阶槽，所述台阶槽与所述连接板吻合。带铁芯的端盖再与机座装配，机座与端盖通过台阶槽配合，可以保证装配定位。
在一些实施方式中，所述台阶槽上设有第一螺纹通孔，所述连接板设有第二螺纹通孔，所述端盖与所述机座通过第一螺栓连接，所述第一螺栓的螺杆依次螺纹连接在所述第一螺纹通孔和所述第二螺纹通孔中，所述第一螺栓的螺杆的端部与所述连接板朝向所述机座内部的一面齐平。通过螺栓螺接在螺纹孔中的方式连接的较为牢固。
在一些实施方式中，所述端盖朝向所述机座内的一面设有过渡件装配孔。
在一些实施方式中，所述过渡件的一端与所述铁芯焊接连接，所述过渡件的另一端安装在所述过渡件装配孔中并通过第二螺栓固定连接。由此提高线圈端部空间及铁芯强度。
在一些实施方式中，所述端盖上设有第三螺纹通孔，所述第三螺纹通孔与所述过渡件装配孔相连通，所述过渡件安装在所述过渡件装配孔中的一端设有螺纹盲孔，所述第二螺栓的螺杆依次螺纹连接在所述第三螺纹孔、所述过渡件装配孔和所述螺纹盲孔中。通过螺栓螺接在螺纹孔中的方式连接的较为牢固。
在一些实施方式中，所述端盖与所述机座为一体结构。为简化装配过程可以将端盖与机座用铸件代替，在铸造过程中将机座与端盖铸成一体；由此使得端盖和机座连接的更为牢固，使得铁芯更为稳固的固定在机座上。
附图说明
图1是本发明一实施方式的一种电机定子铁芯的固定结构的结构示意图。
具体实施方式
图1示意性地显示了本发明的一种实施方式的电机定子铁芯的固定结构。如图1所示，该电机定子铁芯包括铁芯3、过渡件4、端盖2和机座1。
过渡件4与铁芯3固定连接。过渡件4通过螺栓与端盖2连接。端盖2与过渡件4垂直设置。端盖2与机座1垂直设置。端盖2与机座1的端部连接且覆盖机座1的端面。铁芯3位于机座1内，且铁芯3与机座1平行设置。铁芯3与机座1之间设有用于容纳冷却部件的空间。
机座1的端部向其中心方向延伸有连接板11，连接板11与机座1的侧壁垂直设置。由此便于连接板11的制作，以及机座1与端盖2的连接。连接板11与机座1为一体结构，利于连接板11的制作，且连接板的牢度较高。端盖2朝向机座1外的一面为平面，端盖2朝向机座1内部的一面的四周设有台阶槽。台阶槽朝向机座1的内部。端盖2设置台阶槽处的厚度小于端盖2其他部分的厚度。台阶槽贴合在连接板上，并通过螺栓固定连接。具体地，台阶槽部上设有第一螺纹通孔，连接板上设有第二螺纹通孔。第一螺栓51的杆部依次穿过端盖2的台阶槽部上的第一螺纹通孔和机座1上的连接板的第二螺纹通孔使端盖2和机座固定。第一螺51栓的杆部的端部与连接板11朝向机座1内的一面齐平，第一螺栓51的头部位于端盖2朝向机座1外部的平整端面上，以保证电机定子铁芯的固定结构的正常工作。
端盖2设置台阶槽的一面的中部设有过渡件装配孔21。过渡件4的一端与铁芯3固定连接。具体地，铁芯3与过渡件4焊接连接。由此提高线圈端部空间及铁芯3强度。过渡件4的另一端安装在过渡件装配孔21中。过渡件4安装在过渡件装配孔21中的一端部设有螺纹盲孔。端盖2的中部设有第三螺纹通孔。螺纹盲孔的位置和第三螺纹通孔的位置相对应。第三螺纹通孔与螺纹盲孔相连通。过渡件4通过螺栓与端盖2连接。具体地，第二螺栓52穿过端盖2中部的第三螺纹孔后穿设在螺纹盲孔中，以此将端盖2与过渡件4固定连接，使铁芯3与机座1平行设置，端盖2与过渡件4垂直设置，以保证铁芯的正常工作。
在该实施例中，端盖2的内侧设有台阶槽，机座1的内侧的连接环与台阶槽贴合并通过螺栓固定连接。带铁芯3的端盖2再与机座1装配，机座1与端盖2通过台阶槽配合，可以保证装配定位。在其他实施方式中，端盖2与机座1为一体结构。为简化装配过程可以将端盖2与机座1用铸件代替，在铸造过程中将机 座1与端盖2铸成一体；由此使得端盖2和机座1连接的更为牢固，使得铁芯3更为稳固的固定在机座1上。
铁芯3位于机座1内，铁芯3与机座1平行设置，铁芯3与机座1之间设有用于容纳冷却部件的空间。本发明整体采用轴向装配，首先铁芯3与过渡件4焊接，使铁芯3外圆加工量减少，加工精度较高且成本较低；将带过渡件4的铁芯3与端盖2装配，经螺栓固定，此时只需要加工过渡件4的外圆及端盖2板上的定位槽即可，加工量大大减少；上述结构可以使铁芯3与机座1之间能够提供空间排布冷却铁芯3的冷却器，如冷水、风冷等。
以上所述的仅是本发明的一些实施方式。对于本领域普通技术人员来讲，在不脱离本发明创造构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。

Claims (8)

  1. 一种电机定子铁芯的固定结构，其特征在于，包括铁芯、过渡件、端盖和机座，所述过渡件与所述铁芯固定连接，所述过渡件通过螺栓与所述端盖连接，所述端盖与所述过渡件垂直设置，所述端盖与所述机座的端部连接且覆盖所述机座的端面，所述铁芯与所述机座平行设置，所述铁芯与所述机座之间设有用于容纳冷却部件的空间。
  2. 根据权利要求1所述的电机定子铁芯的固定结构，其特征在于，所述机座向其中心方向延伸有连接板，所述连接板与所述机座垂直设置。
  3. 根据权利要求2所述的电机定子铁芯的固定结构，其特征在于，所述端盖的周边设有朝向所述机座内的台阶槽，所述台阶槽与所述连接板吻合。
  4. 根据权利要求3所述的电机定子铁芯的固定结构，其特征在于，所述台阶槽上设有第一螺纹通孔，所述连接板设有第二螺纹通孔，所述端盖与所述机座通过第一螺栓连接，所述第一螺栓的螺杆依次螺纹连接在所述第一螺纹通孔和所述第二螺纹通孔中，所述第一螺栓的螺杆的端部与所述连接板朝向所述机座内部的一面齐平。
  5. 根据权利要求1所述的电机定子铁芯的固定结构，其特征在于，所述端盖朝向所述机座内的一面设有过渡件装配孔。
  6. 根据权利要求5所述的电机定子铁芯的固定结构，其特征在于，所述过渡件的一端与所述铁芯焊接连接，所述过渡件的另一端安装在所述过渡件装配孔中并通过第二螺栓固定连接。
  7. 根据权利要求6所述的电机定子铁芯的固定结构，其特征在于，所述端盖上设有第三螺纹通孔，所述第三螺纹通孔与所述过渡件装配孔相连通，所述过渡件安装在所述过渡件装配孔中的一端设有螺纹盲孔，所述第二螺栓的螺杆依次螺纹连接在所述第三螺纹孔、所述过渡件装配孔和所述螺纹盲孔中。
  8. 根据权利要求1所述的电机定子铁芯的固定结构，其特征在于，所述端盖与所述机座为一体结构。
PCT/CN2018/103858 2017-09-27 2018-09-03 一种电机定子铁芯固定结构 WO2019062482A1 (zh)

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