WO2016033995A1 - Structure for fixing stator core and base - Google Patents

Structure for fixing stator core and base Download PDF

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Publication number
WO2016033995A1
WO2016033995A1 PCT/CN2015/080010 CN2015080010W WO2016033995A1 WO 2016033995 A1 WO2016033995 A1 WO 2016033995A1 CN 2015080010 W CN2015080010 W CN 2015080010W WO 2016033995 A1 WO2016033995 A1 WO 2016033995A1
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Prior art keywords
stator core
base
bracket
fixing
positioning rib
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PCT/CN2015/080010
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French (fr)
Chinese (zh)
Inventor
郑小康
刘政
钱昌燕
骆林
梁宇强
龚春源
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东方电气集团东方电机有限公司
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Publication of WO2016033995A1 publication Critical patent/WO2016033995A1/en

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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 field of electric machines, and in particular relates to a fixing structure of a stator core and a base.
  • the fixing of the stator core of the motor and the base is basically connected by the positioning rib and the bracket.
  • the Chinese patent number "200910073282.7” discloses a two-tailed non-movable positioning rib welding process for a hydro-generator, which is published on June 30, 2010.
  • the connection structure between the stator core and the base is: the positioning rib is welded and fixed on the stator core, the bracket is welded and fixed on the base, and the dovetail of the positioning rib is welded and fixed in the dovetail groove of the bracket. .
  • stator core expands due to heat (radial), but the expansion of the base is much smaller than the expansion of the stator core, which makes the stator core and stator machine Large stresses occur between the seats, which may cause warpage of the stator core and the base.
  • the object of the present invention is to overcome the above problems in the prior art and to provide a fixing structure of a stator core and a base.
  • the invention can not only effectively prevent the stator core and the frame from being warped and deformed due to the expansion of the stator core, but also can reduce the vibration of the stator core by the rigidity of the base.
  • a fixing structure of a stator core and a base comprises a positioning rib and a bracket fixed between the stator core and the base, wherein the bracket comprises a plurality of brackets for radially fixing the positioning ribs
  • the block A and the plurality of brackets B for tangentially fixing the positioning ribs are provided with elastic elements between the brackets A and the positioning ribs.
  • a mounting slot is defined in the bracket A, and the bracket A is connected to the positioning rib through a mounting slot, and the elastic component is fixed in the mounting slot.
  • the elastic element is a disc spring, a spring or a corrugated plate.
  • the carrier block A is spaced apart from the carrier block B.
  • the base itself and the stator core itself have rigidity, when the stator core is heated and expanded, the stator core is placed on the base by the elastic member disposed between the bracket A and the positioning rib.
  • the sub-iron core can utilize the rigidity of the base to a certain extent, that is, the base can better restrain the stator core, reduce the vibration of the stator core, and make the operation of the motor more safe and reliable.
  • the bracket B can fix the positioning rib from the tangential direction, the positioning rib can be fixed from the radial direction and the tangential direction by the cooperation of the bracket A and the bracket B, so that the stability of the stator core after installation is better, and It can prevent the stator core and the base from warping and deforming.
  • the bracket A is connected to the positioning rib through a mounting groove, and the elastic member is fixed in the mounting groove, and the structure makes the binding effect of the base to the stator core better.
  • the elastic member can be made of a common material such as a disc spring, a spring or a corrugated plate, so that the present invention can effectively solve the problem of warpage deformation of the stator core under the premise of less cost.
  • bracket A is spaced apart from the bracket B. This structure is sufficient to not only fix the positioning ribs from the radial direction and the tangential direction, but also to make the stator core more stable after installation.
  • Embodiment 1 is a schematic front view showing the structure of Embodiment 1;
  • FIG. 2 is a schematic perspective view of the first embodiment
  • Embodiment 3 is a schematic front view showing the structure of Embodiment 2;
  • FIG. 4 is a schematic perspective view of a second embodiment
  • the markings in the figure are: 1, base, 2, bracket A, 3, stator core, 4, positioning ribs, 5, elastic elements, 6, brackets B, 7, mounting slots.
  • a fixing structure of a stator core and a base comprises a positioning rib 4 and a bracket fixed between the stator core 3 and the base 1, the bracket comprising a plurality of brackets for radially fixing the positioning ribs 4
  • the block A2 and a plurality of brackets B6 for tangentially fixing the positioning ribs 4 are provided with an elastic member 5 between the brackets A2 and the positioning ribs 4.
  • the bracket A2 has a square structure, and one end of the elastic member 5 is fixed on the bracket A2, and the other end is in contact with the positioning rib 4 but is not fixed.
  • the elastic member 5 is preferably made of a disc spring, a spring or a corrugated plate, but may be made of a resin or other elastic filler.
  • the bracket A2 and the bracket B6 are preferably spaced apart from each other, but are not limited to the above preferred arrangement, and may be determined according to actual conditions.
  • one bracket B6 is disposed between any two brackets A2, or two brackets B6 are disposed between any two brackets A2, or two brackets A2 are disposed between any two brackets B6.
  • the block A2 and the block B6 are arranged in a two-two interval.
  • the support block B6 is a common support block in the prior art.
  • This embodiment is basically the same as the above embodiment.
  • the main difference is that the mounting block A2 is provided with a mounting slot 7 , the elastic component 5 is fixedly mounted in the mounting slot 7 , and one end of the elastic component 5 is fixed to the mounting slot 7 . Connected, the other end is in contact with the positioning rib 4 but not fixed.
  • the elastic member 5 is first fixedly mounted in the mounting groove 7 of the bracket A2 to be integrated, and the positioning rib 4 and the support are fixed in the circumferential position and the axial position by special tools according to actual requirements.
  • Block B6 then the bracket B6 is welded to the ring plate of the base 1, the bracket A2 (including the elastic member 5) is placed on the outer surface of the positioning rib 4, and finally the bracket A2 is welded to the ring plate of the base 1 installation.

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

Abstract

A structure for fixing a stator core (3) and a base (1), comprising a positioning rebar (4) and a holding block fixed between the stator core and the base; the holding block comprises a plurality of holding blocks A (2) for fixing the positioning rebar in a radial direction and a plurality of holding blocks B (6) for fixing the positioning rebar in a tangential direction; and elastic elements (5) are provided between the holding blocks A and the positioning rebar. The fixing structure effectively prevents a warping deformation of the stator core and the base caused by the expansion of the stator core, and reduces the vibration of the stator core by utilizing the rigidity of the base.

Description

一种定子铁芯与机座的固定结构Fixed structure of stator core and base 技术领域Technical field
本发明属于电机领域，尤其涉及一种定子铁芯与机座的固定结构。The invention belongs to the field of electric machines, and in particular relates to a fixing structure of a stator core and a base.
背景技术Background technique
现有技术中，电机定子铁芯与机座的固定，基本是通过定位筋和托块连接。如中国专利号“200910073282.7”公开了一种水轮发电机双鸽尾不可移动定位筋装焊工艺，其公开日为2010年6月30日。在该专利中，定子铁芯与机座的连接结构为：定位筋焊接固定在定子铁芯上，托块焊接固定在机座上，定位筋的鸽尾焊接固定在托块的鸽尾槽内。但在实际使用过程中，当机组运行时，定子铁芯因受热而发生膨胀(径向)，但机座的膨胀度远远小于定子铁芯的膨胀度，这就使得定子铁芯与定子机座之间出现了较大的应力，这种应力可能导致定子铁芯和机座的翘曲变形。In the prior art, the fixing of the stator core of the motor and the base is basically connected by the positioning rib and the bracket. For example, the Chinese patent number "200910073282.7" discloses a two-tailed non-movable positioning rib welding process for a hydro-generator, which is published on June 30, 2010. In the patent, the connection structure between the stator core and the base is: the positioning rib is welded and fixed on the stator core, the bracket is welded and fixed on the base, and the dovetail of the positioning rib is welded and fixed in the dovetail groove of the bracket. . However, in actual use, when the unit is running, the stator core expands due to heat (radial), but the expansion of the base is much smaller than the expansion of the stator core, which makes the stator core and stator machine Large stresses occur between the seats, which may cause warpage of the stator core and the base.
另外，现有技术中提出了在定位筋与托块之间的径向留出一定的空气间隙来解决上述问题，这种方式虽然可以解决定子铁芯和机座刚性固定导致翘曲变形的问题，但由于间隙的存在和径向上的自由度，导致定子铁芯没有很好地利用机座的刚度，进而可能导致定子铁芯的振动增大。In addition, in the prior art, it is proposed to solve the above problem by leaving a certain air gap in the radial direction between the positioning rib and the bracket, which can solve the problem of warpage deformation caused by the rigidity fixing of the stator core and the base. However, due to the existence of the gap and the degree of freedom in the radial direction, the stator core does not make good use of the rigidity of the base, which may cause the vibration of the stator core to increase.
发明内容Summary of the invention
本发明的目的在于克服现有技术中存在的上述问题，提供一种定子铁芯与机座的固定结构。本发明不仅能够有效防止因定子铁芯膨胀而导致的定子铁芯和机座翘曲变形，还能够利用机座的刚度减小定子铁芯的振动。The object of the present invention is to overcome the above problems in the prior art and to provide a fixing structure of a stator core and a base. The invention can not only effectively prevent the stator core and the frame from being warped and deformed due to the expansion of the stator core, but also can reduce the vibration of the stator core by the rigidity of the base.
为实现上述目的，本发明采用的技术方案如下：In order to achieve the above object, the technical solution adopted by the present invention is as follows:
一种定子铁芯与机座的固定结构，包括固定在定子铁芯与机座之间的定位筋和托块，其特征在于：所述托块包括多个用于径向固定定位筋的托块A和多个用于切向固定定位筋的托块B，所述托块A与定位筋之间设置有弹性元件。A fixing structure of a stator core and a base comprises a positioning rib and a bracket fixed between the stator core and the base, wherein the bracket comprises a plurality of brackets for radially fixing the positioning ribs The block A and the plurality of brackets B for tangentially fixing the positioning ribs are provided with elastic elements between the brackets A and the positioning ribs.
所述托块A上开设有安装槽，所述托块A通过安装槽与定位筋连接，所述弹性元件固定在安装槽内。A mounting slot is defined in the bracket A, and the bracket A is connected to the positioning rib through a mounting slot, and the elastic component is fixed in the mounting slot.
所述弹性元件为碟簧、弹簧或波纹板。The elastic element is a disc spring, a spring or a corrugated plate.
所述托块A与托块B间隔排列。The carrier block A is spaced apart from the carrier block B.
采用本发明的优点在于：The advantages of using the invention are:
一、本发明中，由于机座本身和定子铁芯本身都具有刚度，因此当定子铁芯发热膨胀时，通过设置在托块A与定位筋之间的弹性元件，使定子铁芯在机座上有一定的径向膨胀空间，能够有效解决定子铁芯因膨胀而导致定子铁芯和机座翘曲变形的问题，有利于提高定子铁芯的使用寿命。并且，通过弹性元件还使得定 子铁芯能够在一定程度上利用机座的刚度，即使得机座能够更好地约束定子铁芯，减小了定子铁芯的振动，使电机的运行更加安全可靠。又由于托块B能够从切向上固定定位筋，因此通过托块A和托块B的配合，能够从径向和切向上固定定位筋，既使得安装后定子铁芯的稳固性更好，又能够防止定子铁芯和机座翘曲变形。1. In the present invention, since the base itself and the stator core itself have rigidity, when the stator core is heated and expanded, the stator core is placed on the base by the elastic member disposed between the bracket A and the positioning rib. There is a certain radial expansion space, which can effectively solve the problem that the stator core is warped and deformed due to expansion, which is beneficial to improve the service life of the stator core. And, through the elastic element, it also makes The sub-iron core can utilize the rigidity of the base to a certain extent, that is, the base can better restrain the stator core, reduce the vibration of the stator core, and make the operation of the motor more safe and reliable. Moreover, since the bracket B can fix the positioning rib from the tangential direction, the positioning rib can be fixed from the radial direction and the tangential direction by the cooperation of the bracket A and the bracket B, so that the stability of the stator core after installation is better, and It can prevent the stator core and the base from warping and deforming.
二、本发明中，所述托块A通过安装槽与定位筋连接，所述弹性元件固定在安装槽内，此结构使得机座对定子铁芯的约束效果更好。2. In the present invention, the bracket A is connected to the positioning rib through a mounting groove, and the elastic member is fixed in the mounting groove, and the structure makes the binding effect of the base to the stator core better.
三、本发明中，所述弹性元件可以由碟簧、弹簧或波纹板等常见材料制成，使本发明在花费较少成本的前提下，就能够有效解决定子铁芯翘曲变形的问题。3. In the present invention, the elastic member can be made of a common material such as a disc spring, a spring or a corrugated plate, so that the present invention can effectively solve the problem of warpage deformation of the stator core under the premise of less cost.
四、本发明中，所述托块A与托块B间隔排列，此结构够不仅从径向和切向上固定定位筋，还使得安装后定子铁芯的稳固性更好。4. In the present invention, the bracket A is spaced apart from the bracket B. This structure is sufficient to not only fix the positioning ribs from the radial direction and the tangential direction, but also to make the stator core more stable after installation.
附图说明DRAWINGS
图1为实施例1的主视结构示意图；1 is a schematic front view showing the structure of Embodiment 1;
图2为实施例1的立体结构示意图；2 is a schematic perspective view of the first embodiment;
图3为实施例2的主视结构示意图；3 is a schematic front view showing the structure of Embodiment 2;
图4为实施例2的立体结构示意图；4 is a schematic perspective view of a second embodiment;
图中的标记为：1、机座，2、托块A，3、定子铁芯，4、定位筋，5、弹性元件，6、托块B，7、安装槽。The markings in the figure are: 1, base, 2, bracket A, 3, stator core, 4, positioning ribs, 5, elastic elements, 6, brackets B, 7, mounting slots.
具体实施方式detailed description
实施例1Example 1
一种定子铁芯与机座的固定结构，包括固定在定子铁芯3与机座1之间的定位筋4和托块，所述托块包括多个用于径向固定定位筋4的托块A2和多个用于切向固定定位筋4的托块B6，所述托块A2与定位筋4之间设置有弹性元件5。A fixing structure of a stator core and a base comprises a positioning rib 4 and a bracket fixed between the stator core 3 and the base 1, the bracket comprising a plurality of brackets for radially fixing the positioning ribs 4 The block A2 and a plurality of brackets B6 for tangentially fixing the positioning ribs 4 are provided with an elastic member 5 between the brackets A2 and the positioning ribs 4.
本实施例中，所述托块A2为方形结构，所述弹性元件5的一端固定在托块A2上，另一端与定位筋4接触但不固定。In this embodiment, the bracket A2 has a square structure, and one end of the elastic member 5 is fixed on the bracket A2, and the other end is in contact with the positioning rib 4 but is not fixed.
本实施例中，所述弹性元件5优选由碟簧、弹簧或波纹板制成，但也可以由树脂或其它弹性填充物制成。In the present embodiment, the elastic member 5 is preferably made of a disc spring, a spring or a corrugated plate, but may be made of a resin or other elastic filler.
本实施例中，为了保证安装后定子铁芯3的稳固性，优选所述托块A2与托块B6间隔排列，但并不局限于上述优选设置方式，也可根据实际情况确定。例如，在任意两个托块A2之间设置一个托块B6，或在任意两个托块A2之间设置两个托块B6，或在任意两个托块B6之间设置两个托块A2，或托块A2与托块B6以两两间隔的方式排布。In this embodiment, in order to ensure the stability of the stator core 3 after installation, the bracket A2 and the bracket B6 are preferably spaced apart from each other, but are not limited to the above preferred arrangement, and may be determined according to actual conditions. For example, one bracket B6 is disposed between any two brackets A2, or two brackets B6 are disposed between any two brackets A2, or two brackets A2 are disposed between any two brackets B6. , or the block A2 and the block B6 are arranged in a two-two interval.
本实施例中，所述托块B6为现有技术中的普通托块。In this embodiment, the support block B6 is a common support block in the prior art.
实施例2Example 2
本实施例与上述实施例基本相同，主要区别在于：所述托块A2上开设有安装槽7，所述弹性元件5固定安装在安装槽7内，且弹性元件5的一端与安装槽7固定连接，另一端与定位筋4接触但不固定。 This embodiment is basically the same as the above embodiment. The main difference is that the mounting block A2 is provided with a mounting slot 7 , the elastic component 5 is fixedly mounted in the mounting slot 7 , and one end of the elastic component 5 is fixed to the mounting slot 7 . Connected, the other end is in contact with the positioning rib 4 but not fixed.
本发明在安装时，先将弹性元件5固定安装在托块A2的安装槽7内，使其成一整体，再根据实际要求用特殊工具在圆周位置和轴向位置上固定好定位筋4和托块B6，然后将托块B6焊接于机座1环板上，将托块A2(含弹性元件5)靠在定位筋4的外侧表面，最后将托块A2焊接于机座1环板上完成安装。 In the installation of the present invention, the elastic member 5 is first fixedly mounted in the mounting groove 7 of the bracket A2 to be integrated, and the positioning rib 4 and the support are fixed in the circumferential position and the axial position by special tools according to actual requirements. Block B6, then the bracket B6 is welded to the ring plate of the base 1, the bracket A2 (including the elastic member 5) is placed on the outer surface of the positioning rib 4, and finally the bracket A2 is welded to the ring plate of the base 1 installation.

Claims (4)

  1. 一种定子铁芯与机座的固定结构，包括固定在定子铁芯(3)与机座(1)之间的定位筋(4)和托块，其特征在于：所述托块包括多个用于径向固定定位筋(4)的托块A(2)和多个用于切向固定定位筋(4)的托块B(6)，所述托块A(2)与定位筋(4)之间设置有弹性元件(5)。A fixing structure of a stator core and a base comprises a positioning rib (4) and a bracket fixed between the stator core (3) and the base (1), wherein the bracket comprises a plurality of a bracket A (2) for radially fixing the positioning rib (4) and a plurality of brackets B (6) for tangentially fixing the positioning rib (4), the bracket A (2) and the positioning rib ( 4) A resilient element (5) is provided between them.
  2. 如权利要求1所述的一种定子铁芯与机座的固定结构，其特征在于：所述托块A(2)上开设有安装槽(7)，所述托块A(2)通过安装槽(7)与定位筋(4)连接，所述弹性元件(5)固定在安装槽(7)内。The fixing structure of the stator core and the base according to claim 1, wherein the bracket A (2) is provided with a mounting groove (7), and the bracket A (2) is installed. The groove (7) is connected to the positioning rib (4), and the elastic member (5) is fixed in the mounting groove (7).
  3. 如权利要求1或2所述的一种定子铁芯与机座的固定结构，其特征在于：所述弹性元件(5)为碟簧、弹簧或波纹板。A fixing structure of a stator core and a base according to claim 1 or 2, characterized in that the elastic member (5) is a disc spring, a spring or a corrugated plate.
  4. 如权利要求1所述的一种定子铁芯与机座的固定结构，其特征在于：所述托块A(2)与托块B(6)间隔排列。 A fixing structure of a stator core and a base according to claim 1, wherein the bracket A (2) is spaced apart from the bracket B (6).
PCT/CN2015/080010 2014-09-04 2015-05-28 Structure for fixing stator core and base WO2016033995A1 (en)

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WANG, FUYOU: "Stator Structure of Hydraulic Turbine Generator and Assembly Technology thereof", WATER RESOURCES AND HYDROPOWER ENGINEERING, vol. 28, no. 3, 31 December 1997 (1997-12-31), pages 41, ISSN: 1000-0860 *

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