CN210780258U - Sectional type stator structure with unequal-depth stator slots and shielding motor - Google Patents
Sectional type stator structure with unequal-depth stator slots and shielding motor Download PDFInfo
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- CN210780258U CN210780258U CN201922135005.6U CN201922135005U CN210780258U CN 210780258 U CN210780258 U CN 210780258U CN 201922135005 U CN201922135005 U CN 201922135005U CN 210780258 U CN210780258 U CN 210780258U
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Abstract
The stator comprises a middle section type stator unit (2), a first end section type stator unit (1) and a second end section type stator unit (3), wherein the two ends of the first end section type stator unit and the second end section type stator unit are arranged on two sides of the stator, and stator grooves of the middle section type stator unit (2) and the two ends of the second end section type stator unit in the section type structure are not as deep. The utility model provides a sectional type stator structure of stator slot depth not, this structure can provide sufficient space for stator winding overhang's plastic, does benefit to the winding overhang heat dissipation.
Description
Technical Field
The utility model belongs to the motor field relates to a sectional type stator structure and canned motor of stator slot depth not.
Background
With the continuous development of motor theory and material discipline, the types of motors are continuously enriched and are widely applied in the fields of new energy automobiles, petrochemical industry, industrial and mining enterprises and the like. The cylindrical motor has the characteristics of simple structure, low cost, high stability and strong applicability, has wide application prospect, and plays an important role in the canned motor pump industry.
The cylindrical motor is generally composed of a stator, a rotor, a rotating shaft, a bearing and a casing, wherein the stator comprises a stator core, a stator winding, slot insulation and a slot wedge, in order to reduce the iron loss of the motor, the stator core is formed by laminating a limited number of thinner stator punching sheets with the same shape, stator slots are formed in the stator punching sheets, the slot insulation, the stator winding and the slot wedge are placed in the stator slots according to a determined spatial relationship, and the stator windings in different stator slots are connected into a whole through winding end parts according to a determined winding connection method. The structure of the rotor is different according to the type of the motor, such as a permanent magnet rotor, a wound rotor, a squirrel cage rotor.
When the cylindrical motor is applied to the canned motor pump industry, parts such as a stator canned motor cover, a rotor canned motor cover, a stator reinforcing sleeve and the like are often required to be added. The stator reinforcing sleeve is generally in a circular ring shape, and is mainly used for providing necessary mechanical support and protection for a stator shielding sleeve extending out of a stator core, after the shape of the stator reinforcing sleeve is determined, the mechanical strength of the stator reinforcing sleeve is always in positive correlation with the radial thickness of the stator reinforcing sleeve, but when the stator reinforcing sleeve is too thick, the stator reinforcing sleeve is very easy to interfere and scrape with the end part of a stator winding, the installation of the stator reinforcing sleeve is not facilitated, and the insulation of the end part of the stator winding is also damaged.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a sectional type stator structure of stator slot depth inequality, this structure can provide sufficient space for stator winding end's plastic, do benefit to the winding end heat dissipation, based on this structure, a shielding motor of sectional type stator with stator slot depth inequality is provided, the thickness that this shielding motor stator adds the cover can design than current shielding motor stator adds the cover thickness thicker, stator adds the cover installation space bigger, it improves to realize motor heat-sinking capability, insulation reliability improves, the range of application is wider.
The utility model adopts the following technical scheme:
a sectional stator structure with unequal stator slot depths is provided, the stator comprises a middle section type stator unit, a first end section type stator unit and a second end section type stator unit, wherein the stator slots of the middle section type stator unit and the end section type stator unit in the sectional structure are unequal in depth.
Further, the depth of the stator groove of the middle section type stator unit is gradually reduced from two sides to the center in a stepped mode.
Further, the stator slots of the end-segmented stator unit are stepped from the side edges to the center.
Furthermore, stator slots of the middle sectional type stator unit, the end sectional type stator unit I and the end sectional type stator unit II are provided with slot insulation materials, stator windings are arranged in the stator slots of the middle sectional type stator unit, and the end parts of the stator windings extend out of the sectional type stator iron core from the position close to the marked line of the bottom of the stator slot of the end sectional type stator unit II.
Furthermore, the middle-section stator unit, the end-section stator units I and the end-section stator units II on the two sides are all of hollow cylindrical structures, are formed by laminating thinner stator punching sheets, and have the same inner diameter and the same number of stator slots with two through sides.
Furthermore, the stator slots of the middle sectional type stator unit are shallower by about 5% -100% than those of the end sectional type stator unit I and the end sectional type stator unit II on two sides, the depth of the stator slots of the end sectional type stator unit I and the end sectional type stator unit II is required to be smaller than 90% of (stator outer diameter-stator inner diameter)/2, and the purpose is to prevent the bottom of the stator slot from directly penetrating through the whole stator along the radial direction so as to ensure reliable mechanical strength.
Furthermore, a stator shielding sleeve is arranged on the inner side of the iron core of the sectional stator, and the axial length of the stator shielding sleeve is greater than the sum of the lengths of the sectional stator iron core and the stator winding end.
Furthermore, the effective length of the iron core length of the rotor of the sectional stator structure is equal to that of the middle sectional stator unit, a rotating shaft penetrating through the rotor is embedded in the middle of the rotor, and bearings are arranged at two ends of the rotating shaft.
Furthermore, the outer end parts of the first end part sectional type stator unit and the second end part sectional type stator unit are respectively provided with a stator reinforcing sleeve, the inner diameter of the stator reinforcing sleeve is larger than the outer diameter of the stator shielding sleeve, one side of the stator reinforcing sleeve is in contact with the sectional type stator core, and the other side of the stator reinforcing sleeve is in contact with the inner side of the shell.
The motor is provided with a sectional type stator structure with the stator grooves of different depths.
The stator structure of the utility model is characterized in that the stator structure is a sectional structure, namely a middle sectional stator unit and a terminal sectional stator unit.
Stator slots of the middle-section type stator unit and the end-section type stator unit in the sectional type structure are not equal in depth, and the stator winding end shaping and heat dissipation are facilitated.
The utility model discloses stator slot depth, sectional type stator structure canned motor can design the thicker separation sleeve of radial thickness, benefit to be applied to among the higher operating mode of inside pressure-bearing.
The utility model has the advantages as follows:
1. the stator structure of the utility model is characterized in that the stator structure is sectional type and the stator slots of each sectional unit are not equal in depth, which is beneficial to the wire embedding and the end shaping of the stator winding and avoids the accelerated aging and failure of the insulation of the stator winding caused by overheating of the end of the stator winding;
2. the stator winding of the utility model has larger shaping space, and when the stator winding is used as a shielding motor and applied to the shielding pump industry, a thicker stator reinforcing sleeve can be designed, which is beneficial to being applied to the working condition with higher internal pressure bearing;
3. the utility model discloses the heat-sinking capability of stator winding overhang has been improved by a wide margin, has changed in the past stator winding overhang and has passed through the air cooling and the drawback that heat-sinking capability is not enough, is particularly useful for occasions such as high power density motor, high-power motor.
Drawings
FIG. 1 is a front view of a sectional stator structure with unequal stator slots according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken at C-C of FIG. 1;
FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1;
fig. 6 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 7 is a schematic structural view of embodiment 2 of the present invention;
fig. 8 is a schematic structural view of embodiment 3 of the present invention.
The labels in the figure are: 1. a first end segment type stator unit, a second end segment type stator unit, a-A, a section of the first end segment type stator unit, a-B, a section of the middle segment type stator unit, a C-C, a section of the second end segment type stator unit, a D-D, a sectional stator structure integral section view with unequal stator grooves, 4, a stator groove bottom mark line of the first end segment type stator unit, 5, a stator groove bottom mark line of the middle segment type stator unit, 6, a stator groove bottom mark line of the second end segment type stator unit, 7, a motor shell, 8, a stator winding end, 9, a stator reinforcing sleeve, 10, a stator shielding sleeve, 11, a rotating shaft, 12, a rotor, 13, a bearing, I, a first other implementation mode, II, a second implementation mode, 101, a section one of the first end segment type stator unit, 102. segment two, 103 of end segment stator unit one, segment three, 104 of end segment stator unit one, segment four, 105 of end segment stator unit one, segment five, 106 of end segment stator unit one, segment six, 107 of end segment stator unit one, segment seven, 108 of end segment stator unit one, segment eight, 401 of end segment stator unit one, segment stator slot bottom graticule of end segment stator unit one, segment two stator slot bottom graticule of 402, segment two stator slot bottom graticule of end segment stator unit one, segment three stator slot bottom graticule of 403, end segment stator unit one, segment four stator slot bottom graticule of 404, end segment stator unit one, segment four stator slot bottom graticule of 405, segment five stator slot bottom graticule of end segment stator unit one, segment six stator slot bottom graticule of 406, end segment stator unit one, 407. a segmented seven stator slot bottom index of the end segmented stator unit one, 408, a segmented eight stator slot bottom index of the end segmented stator unit one.
Detailed Description
The method comprises the following steps of (I) determining the main dimensions (inner and outer diameters of a stator and a rotor, a slot type of the stator and the rotor, the length of an iron core, the matching of pole slots and winding parameters) of the motor by utilizing a design method or an intelligent optimization algorithm of the shielded motor, namely an equivalent magnetic circuit method, a finite element method, a multi-objective optimization method, a genetic algorithm and a wellhead field method.
And (II) analyzing the performance of the shielding motor and carrying out multi-physical analysis by using commercial motor simulation software, and optimizing the performance and parameters of the shielding motor again.
And (III) calculating according to the first step and the second step to obtain the length of the motor iron core and the stator groove type, processing the stator punching sheets, and laminating the stator punching sheets to form the stator. As shown in fig. 1, the sectional stator (hereinafter referred to as "sectional stator") with unequal-depth stator slots of the present invention includes a middle sectional stator unit 2, and end sectional stator units 1 and 3 on both sides.
Example 1
The utility model discloses a sectional type stator (hereinafter referred to as "sectional type stator") of stator slot depth inequality, including well segmental type stator unit 2 and the end segmental type stator unit 1 of both sides, end segmental type stator unit two 3.
The middle sectional type stator unit 2, the end sectional type stator units I1 and the end sectional type stator units II 3 on the two sides are all of hollow cylindrical structures, are formed by laminating stator punching sheets with thin thicknesses, have the same inner diameter and the same number of stator grooves with two through sides, and the stator grooves of the middle sectional type stator unit 2 are shallower than the stator grooves of the end sectional type stator units I1 and the end sectional type stator units II 3 on the two sides, but the width of the stator grooves is kept consistent.
Fig. 6 is a schematic structural diagram of an embodiment of the present invention, including stator tank bottom marked line 4 of the first end-segmented stator unit, stator tank bottom marked line 5 of the first end-segmented stator unit, stator tank bottom marked line 6 of the second end-segmented stator unit, motor housing 7, stator winding end 8, stator reinforcing sleeve 9, stator shielding sleeve 10, rotating shaft 11, rotor 12, and bearing 13.
Stator slots of the middle sectional type stator unit 2, the end sectional type stator unit I1 and the end sectional type stator unit II 3 need to be placed with slot insulation materials, stator windings are placed in the stator slots of the middle sectional type stator unit 2, and the end parts 8 of the stator windings extend out of the sectional type stator iron cores from the positions of the stator slot bottom marked lines 6 close to the end sectional type stator unit II through shaping.
The inner side of the sectional stator core is provided with a stator shielding sleeve 10, the axial length of which is usually larger than the sum of the lengths of the sectional stator core and the stator winding end part 8, and the actual length needs to be adjusted according to design requirements, the length of the shaped stator winding end part and industry standards.
The effective length of the iron core length of the rotor 12 is equal to the effective length of the middle sectional type stator unit 2, a rotating shaft 11 penetrating through the rotor 12 is embedded in the middle of the rotor 12, and bearings 13 are arranged at two ends of the rotating shaft.
One end of the second end-segmented stator unit 3 is provided with a stator reinforcing sleeve 9, one end of the first end-segmented stator unit 1 is also provided with a stator reinforcing sleeve, the stator reinforcing sleeve 9 is annular, in order to facilitate assembly of the stator reinforcing sleeve 9, the inner diameter of the stator reinforcing sleeve 9 is slightly larger than the outer diameter of the stator shielding sleeve 10, the axial length of the stator reinforcing sleeve 9 is adjusted according to design requirements and industrial standards, one side of the stator reinforcing sleeve 9 is in contact with a segmented stator core, and the other side of the stator reinforcing sleeve is in contact with the inner side of the casing 7.
Example 2
Fig. 7 is another embodiment of the present invention, based on the embodiment in fig. 6, a first end-segmented stator unit 1 and a second end-segmented stator unit 2 are re-segmented, and the first end-segmented stator unit 1 is taken as an example, and the first end-segmented stator unit I is re-segmented into four segments in other embodiments, that is, a first segment 101 of the first end-segmented stator unit, a second segment 102 of the first end-segmented stator unit, a third segment 103 of the first end-segmented stator unit, and a fourth segment 104 of the first end-segmented stator unit, and axial lengths of the four segments may be the same or may be appropriately adjusted according to actual lengths.
Further, in the first alternative embodiment of fig. 7, the first segmented stator unit I has a step-shaped segment-by-segment stator slot bottom marked line 401, the first segmented stator unit I has a second segmented stator slot bottom marked line 402, the first segmented stator unit I has a third segmented stator slot bottom marked line 403, and the first segmented stator unit I has a fourth segmented stator slot bottom marked line 404.
Example 3
Similarly, in the other embodiment II, it is subdivided into eight segments, that is, segment one 101 of the end-segment-type stator unit one, segment two 102 of the end-segment-type stator unit one, segment three 103 of the end-segment-type stator unit one, segment four 104 of the end-segment-type stator unit one, segment five 105 of the end-segment-type stator unit one, segment six 106 of the end-segment-type stator unit one, segment seven 107 of the end-segment-type stator unit one, segment eight 108 of the end-segment-type stator unit one, and the axial lengths of the eight segments may be the same or may be appropriately adjusted according to actual lengths.
Further, in the second embodiment of fig. 7, a sectional-one stator slot bottom marked line 401 of the first end sectional stator unit, a sectional-two stator slot bottom marked line 402 of the first end sectional stator unit, a sectional-three stator slot bottom marked line 403 of the first end sectional stator unit, a sectional-four stator slot bottom marked line 404 of the first end sectional stator unit, a sectional-five stator slot bottom marked line 405 of the first end sectional stator unit, a sectional-six stator slot bottom marked line 406 of the first end sectional stator unit, a sectional-seven stator slot bottom marked line 407 of the first end sectional stator unit, and a sectional-eight stator slot bottom marked line 408 of the first end sectional stator unit are stepped along the axial direction.
It should be noted that, in practical implementation, the axial lengths, the number of segments, and the axial lengths of each segment of the first end-segment stator unit 1 and the second end-segment stator unit 3 need to be calculated, so as to avoid affecting the operation performance of the motor and consider the difficulty of the machining process. When adopting the utility model discloses during the not equidistance sectional type stator structure of stator slot, the heat-sinking capability of stator winding tip will obtain the improvement that is showing, improve motor operating efficiency.
Meanwhile, in the description of the embodiments of the present invention, the terms "axial direction", "radial direction", "inner direction", "outer direction" and other knowledge orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only used for the purpose of more clearly describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, and the present invention is not limited thereto. Furthermore, the terms "a," "an," "two," "three," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to any number of technical features indicated.
The above is only the partial embodiments of the present invention, not used to limit the present invention, all are in the spirit and principle of the present invention, any modification, equivalent replacement, improvement, etc. is made, for example, heat conduction holes, ventilation holes are designed on the stator punching sheet, or the periphery of the stator punching sheet is designed into other geometric shapes, or the length of the rotor core is not the same as the length of the stator core, or the stator motor in the outer rotor, or the stator slot shape and geometric shape are changed, or the sectional structure linear motor with the stator slots not being equal in depth is manufactured, as long as the stator adopts the sectional structure with the stator slots not being equal in depth, the present invention should be included in the protection scope.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A sectional type stator structure with stator grooves of different depths is characterized in that: the stator comprises a middle-segment type stator unit (2), a first end-segment type stator unit (1) and a second end-segment type stator unit (3), wherein the stator slots of the middle-segment type stator unit (2) and the end-segment type stator unit in the segment type structure are not equal in depth.
2. The segmented stator structure of claim 1 wherein the stator slots are not of equal depth: the depth of the stator groove of the middle sectional type stator unit (2) is gradually reduced from two sides to the center in a stepped manner.
3. The segmented stator structure of claim 1 wherein the stator slots are not of equal depth: the stator slots of the end-segmented stator unit are stepped and decreased from the side edges to the center.
4. The segmented stator structure of claim 1 wherein the stator slots are not of equal depth: stator slots of the middle sectional type stator unit (2), the end sectional type stator unit I (1) and the end sectional type stator unit II (3) are provided with slot insulation materials, stator windings are arranged in the stator slots of the middle sectional type stator unit (2), and the end parts (8) of the stator windings extend out of the sectional type stator iron core from the position of a stator slot bottom marked line (6) close to the end sectional type stator unit II.
5. The segmented stator structure of claim 1 wherein the stator slots are not of equal depth: the middle sectional type stator unit (2), the end sectional type stator units I (1) on the two sides and the end sectional type stator units II (3) on the two sides are of hollow cylindrical structures, are formed by laminating thinner stator punching sheets, and have the same inner diameter and the same number of stator grooves with two penetrating sides.
6. The segmented stator structure of claim 5 wherein the stator slots are not of equal depth: the stator grooves of the first end sectional type stator unit (1) and the second end sectional type stator unit (3) on the two sides of the stator groove of the middle sectional type stator unit (2) are 5% -100% shallow, and the stator groove depths of the first end sectional type stator unit (1) and the second end sectional type stator unit (3) are required to be less than 90% of (stator outer diameter-stator inner diameter)/2.
7. The segmented stator structure of claim 1 wherein the stator slots are not of equal depth: the inner side of the iron core of the sectional stator is provided with a stator shielding sleeve (10), and the axial length of the stator shielding sleeve is greater than the sum of the lengths of the sectional stator iron core and the stator winding end part (8).
8. The segmented stator structure of claim 1 wherein the stator slots are not of equal depth: the effective length of the iron core length of the rotor (12) of the sectional stator structure is equal to that of the middle sectional stator unit (2), a rotating shaft (11) penetrating through the rotor (12) is embedded in the middle of the rotor (12), and bearings (13) are arranged at two ends of the rotating shaft.
9. The segmented stator structure of claim 1 wherein the stator slots are not of equal depth: the outer end parts of the first end part sectional type stator unit (1) and the second end part sectional type stator unit (3) are respectively provided with a stator reinforcing sleeve (9), the inner diameter of the stator reinforcing sleeve (9) is larger than the outer diameter of a stator shielding sleeve (10), one side of the stator reinforcing sleeve (9) is in contact with a sectional type stator iron core, and the other side of the stator reinforcing sleeve is in contact with the inner side of the shell (7).
10. A canned motor having a segmented stator with unequal stator slot depths according to claim 1, wherein: the motor has a segmented stator structure with unequal stator slot depths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922135005.6U CN210780258U (en) | 2019-12-03 | 2019-12-03 | Sectional type stator structure with unequal-depth stator slots and shielding motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922135005.6U CN210780258U (en) | 2019-12-03 | 2019-12-03 | Sectional type stator structure with unequal-depth stator slots and shielding motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210780258U true CN210780258U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922135005.6U Active CN210780258U (en) | 2019-12-03 | 2019-12-03 | Sectional type stator structure with unequal-depth stator slots and shielding motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210780258U (en) |
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2019
- 2019-12-03 CN CN201922135005.6U patent/CN210780258U/en active Active
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