CN107492968B - Insulating framework and motor stator - Google Patents
Insulating framework and motor stator Download PDFInfo
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- CN107492968B CN107492968B CN201710637044.9A CN201710637044A CN107492968B CN 107492968 B CN107492968 B CN 107492968B CN 201710637044 A CN201710637044 A CN 201710637044A CN 107492968 B CN107492968 B CN 107492968B
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- terminal
- annular wall
- terminal groove
- groove
- insulating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
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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
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
Abstract
The invention relates to an insulating framework and a motor stator, and relates to the technical field of motors. The technical scheme mainly adopted is as follows: an insulating framework comprises an insulating framework body; wherein, the insulating framework body is provided with a three-phase lead-out terminal groove part; wherein, three terminal grooves are arranged on the three-phase lead-out terminal groove part; and each terminal slot is used for installing a wire pressing terminal. Wherein the centers of the three terminal grooves on the three-phase lead-out terminal groove part are not on a straight line. A motor stator comprises the insulating framework. The invention is mainly used for effectively improving the creepage distance between the wire pressing terminals in the three terminal grooves of the three-phase lead-out terminal groove part on the insulating framework, thereby improving the insulating voltage-resistant grade between the three-phase winding enameled wires and between the wire pressing terminals and finally improving the running reliability of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to an insulating framework and a motor stator.
Background
An electric machine is a rotary electric machine that converts electrical energy into mechanical energy. The motor generally consists of two parts, namely a motor stator and a motor rotor; the motor stator mainly comprises a stator core, a winding and an insulating framework; the insulating framework is an injection molding piece which is arranged at two ends of the stator core and has a wire passing design.
Fig. 1 is a schematic diagram of an insulating frame commonly used in a stator of a motor according to the prior art. As shown in fig. 1, two integrated wire pressing terminal groove structures are provided on an existing insulating framework 1. One of the two-slot wire pressing terminal slot structure is a neutral terminal slot part 12 for fixing the neutral wire short-circuited end of the stator winding. The other three-groove line pressing terminal groove structure is a three-phase lead-out line terminal groove part 11 and is used for connecting a three-phase lead-out line assembly; when the three-phase enameled wire is used, the three-phase enameled wire is pressed into the terminal groove through the wire pressing terminal. Wherein, three terminal grooves on the three-phase lead-out terminal groove part 11 are in a linear arrangement structure. In addition, in order to enable the enameled wire to be conveniently embedded into the terminal groove, the two wire pressing terminal groove structures are all kept away from a certain space on one side close to the insulating framework wall, so that the section of the wire pressing terminal groove structure is of an L-shaped structure. As shown in fig. 2, after the above-mentioned existing insulating frame 1 is assembled with the stator core 2, two wire pressing terminal groove structures of the insulating frame 1 are respectively located on two opposite sides of the motor stator.
The present inventors have found that the above-mentioned conventional insulating frame has at least the following problems:
(1) The three terminal groove positions of the three-phase lead-out terminal groove part of the existing insulating framework are in a linear arrangement structure, and the structure can lead to the short space distance and creepage distance between the line pressing terminals in the three terminal grooves, so that the insulating voltage-resistant grade of the motor is insufficient.
(2) The section of the line pressing terminal groove structure on the existing insulating framework is of an L-shaped structure, the L-shaped structure is weak in structural strength, and hidden danger of breakage exists in the assembly of the outgoing line component and the transportation process of the motor stator.
(3) As compressors are increasingly tending to be miniaturized and efficient, space utilization within the compressor is becoming increasingly important. The two line pressing terminal groove structures of the existing insulating framework are respectively positioned on two opposite sides of the motor stator; and inside the compressor, stator core is less in the reserved space of four sideline directions, sets up line ball terminal groove structure in the sideline position, has the hidden danger of interfering with other parts in the compressor, and simultaneously, each line ball terminal groove overall arrangement that this installation direction also makes is limited, and compressor inner space utilization is lower, and the part adjustment space adjacent with insulating skeleton is little, is unfavorable for compressor volume miniaturization.
Disclosure of Invention
In view of the above, the present invention provides an insulating frame and a motor stator, and is mainly aimed at effectively increasing the creepage distance between the wire pressing terminals in the three terminal slots of the three-phase lead-out wire terminal slot portion, so as to increase the insulating voltage-withstanding level between the three-phase windings and between the wire pressing terminals.
In order to achieve the above purpose, the present invention mainly provides the following technical solutions:
in one aspect, embodiments of the present invention provide an insulating skeleton, wherein the insulating skeleton includes: the insulation framework body is provided with a three-phase lead-out terminal groove part; three terminal grooves are formed in the three-phase lead-out terminal groove parts, and each terminal groove is used for installing a line pressing terminal; wherein the centers of the three terminal grooves on the three-phase lead-out terminal groove part are not on a straight line.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Preferably, the line between the centers of the three terminal grooves on the three-phase lead-out terminal groove portion forms an isosceles triangle.
Preferably, the insulating skeleton body includes:
a first annular wall;
a second annular wall located inboard of the first annular wall;
a plurality of connectors, one end of each connector is connected with the first annular wall, and the other end is connected with the second annular wall; wherein each of the connectors is for winding a stator winding;
the three-phase lead-out terminal groove part is connected with the first annular wall, and the three-phase lead-out terminal groove part is located outside an area surrounded by the first annular wall.
Preferably, the three terminal grooves on the three-phase lead-out terminal groove part are a first terminal groove, a second terminal groove and a third terminal groove respectively;
wherein the groove wall of the first terminal groove is connected with the first annular wall;
gaps are reserved among the second terminal groove, the third terminal groove and the first annular wall.
Preferably, each terminal slot on the three-phase lead-out terminal slot part is provided with a wire embedding port for embedding a winding wire into the terminal slot; wherein, the liquid crystal display device comprises a liquid crystal display device,
a wire insertion opening in the first terminal slot communicates with a space between the first annular wall and the second annular wall;
the wire embedding port of the second terminal groove is communicated with the gap between the second terminal groove and the first annular wall;
the wire embedding port of the third terminal slot is communicated with the gap between the third terminal slot and the first annular wall.
Preferably, each terminal groove on the three-phase lead-out terminal groove portion is provided with a wire post at an edge of the wire insertion opening for guiding the winding wire into the terminal groove.
Preferably, the three-phase lead terminal groove portion has a first end and a second end which are disposed opposite to each other; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first end part of the three-phase lead-out terminal groove part is connected with the first annular wall;
a first lead extending port, a second lead extending port and a third lead extending port are formed in the second end part of the three-phase lead-out terminal groove part; wherein the first wire extension port communicates with the first terminal slot; the second wire extending outlet is communicated with the second terminal groove; the third wire extension port is in communication with the third terminal slot.
Preferably, the three terminal grooves on the three-phase lead-out terminal groove part are a first terminal groove, a second terminal groove and a third terminal groove respectively;
wherein the first and second terminal grooves are disposed adjacent to the first annular wall; the third terminal slot is disposed away from the first annular wall;
the first annular wall is provided with a notch at a position opposite to the three-phase lead-out terminal groove part.
Preferably, the insulating framework body is further provided with a neutral line short-circuit terminal groove part;
when the insulating framework comprises a first annular wall, the neutral line short-circuit terminal groove part is connected with the first annular wall, and the neutral line short-circuit terminal groove part is located outside an area surrounded by the first annular wall.
Preferably, the stator core has a polygonal shape, and an end of the stator core has a plurality of corners; the two angles are a first angle and a second angle;
wherein, three-phase lead terminal slot portion and neutral line short circuit terminal slot portion satisfy in the setting position of first annular wall:
when the insulating framework is arranged on the end part of the stator core, the three-phase lead-out terminal slot part is positioned at a first corner of the end part of the stator core; or the three-phase lead-out terminal groove part is positioned at a position close to the first angle on the end part of the stator core;
when the insulating framework is installed on the end part of the stator core, the neutral line short-circuit terminal groove part is positioned at a second corner of the end part of the stator core; or the neutral line short terminal slot is located at a position on the stator core end near the second angle.
Preferably, the first and second angles on the end of the stator core are two angles that are disposed opposite to each other.
Preferably, the neutral line short circuit terminal groove part is provided with at least one and at most three terminal grooves; wherein, the liquid crystal display device comprises a liquid crystal display device,
each terminal groove of the neutral line short-circuit terminal groove part is provided with a wire embedding port for embedding a wire into the terminal groove;
wherein, every terminal groove on the neutral line short circuit terminal slot part is provided with the wire post in the edge department of wire embedding mouth for guide embedding terminal inslot of winding wire.
Preferably, the first annular wall is polygonal and each corner on the first annular wall is provided with a chamfer.
Preferably, at least one wire passing groove is formed in the first annular wall and used for wire passing of the stator winding; and/or
At least one boss is arranged on the first annular wall and used for preventing the jumper wire of each phase winding from falling off.
Preferably, the first annular wall is provided with a circulation groove for increasing the gas circulation quantity near the stator winding; and/or the upper end of the first annular wall is provided with at least one cut-out for increasing the gas flow at the end position of the motor.
Preferably, the first annular wall is further provided with a limiting structure for limiting the compressor oil pump; wherein, limit structure includes:
the first limiting groove is formed in the first annular wall;
the second limiting groove is formed in the first annular wall;
the compressor oil pump is hung on the arch piece, one end of the arch piece is embedded in the first limiting groove, and the other end of the arch piece is embedded in the second limiting groove.
Preferably, the second annular wall is formed by a plurality of spaced apart second walls; wherein the number of the second walls is consistent with that of the connecting pieces, and the second walls are connected in a one-to-one correspondence; and/or
The second annular wall is provided with a first positioning groove for positioning the relative positions of two insulating frameworks respectively arranged at two ends of the stator core.
In another aspect, embodiments of the present invention provide a motor stator; wherein, the motor stator includes:
an insulating skeleton, which is any one of the insulating skeletons described above;
and at least one end of the stator core is connected with the insulating framework.
Preferably, a plurality of boss structures with small upper parts and large lower parts are arranged on the bottom of the insulating framework;
a plurality of fixing holes are formed in the stator core; wherein, the inner diameter of the fixed hole is smaller than the outer diameter of the lower end of the boss structure; the inner diameter of the fixing hole is larger than the outer diameter of the upper end of the boss structure;
the fixing holes and the boss structures are consistent in number and are matched in one-to-one correspondence, so that the insulating framework is fixed on the stator core.
Preferably, a second positioning groove is formed in the insulating framework, and a third positioning groove is formed in the stator core; the second positioning groove is matched with the third positioning groove so as to determine the relative positions of the insulating framework and the stator core when the insulating framework is assembled with the stator core.
Compared with the prior art, the insulating framework and the motor stator have at least the following beneficial effects:
according to the insulation framework, the three terminal grooves on the three-phase lead-out terminal groove part are arranged in a triangle (namely, the centers of the three terminal grooves are not on the same straight line), so that the adjustment space of the distance between the terminal grooves is large, the adjustment is convenient, the creepage distance between the line pressing terminals in the three terminal grooves of the three-phase lead-out terminal groove part can be effectively adjusted (namely, the minimum distance between the centers of the three terminal grooves can be conveniently adjusted by adjusting the side length of the triangle, and then the creepage distance between the line pressing terminals is adjusted), and the insulation voltage withstand level between the three-phase winding enameled wires and between the line pressing terminals is improved; and finally, the operation reliability of the motor is improved.
Further, in the insulation structure provided by the embodiment of the invention, one terminal groove of three terminal grooves which are distributed in a triangular manner on the three-phase lead-out terminal groove part is connected with the first annular wall, and a gap is reserved between the other two terminal grooves and the first annular wall; the arrangement makes the three-phase lead-out terminal slot part and the first annular wall connected into a whole, thereby eliminating the rule avoiding space of the three-phase lead-out terminal slot part outside the first annular wall, namely eliminating the L-shaped section shape in the prior art, forming a solid structure and effectively improving the structural strength of the three-phase lead-out terminal slot part and the insulating framework.
Further, a wire post is arranged at the edge of a wire embedding opening of each terminal slot on the three-phase lead-out terminal slot part and the neutral line short-circuit terminal slot part on the insulating framework, and the wire post can effectively reduce the difficulty of embedding the enameled wire of the terminal slot part and improve the efficiency of embedding the winding enameled wire. Particularly, for the neutral line short-circuit terminal groove part, the wire column is arranged, so that the wire embedding avoiding space between the wire column and the insulating framework body can be reduced, and the material and the volume of the insulating framework are further reduced.
Further, when the insulating framework provided by the embodiment of the invention is installed on the stator core, the three-phase lead-out terminal groove part and the neutral line short-circuit terminal groove part are respectively positioned at two opposite angles or near the opposite angles on the stator core; through the arrangement, the space of the end part of the stator core near the edges can be improved, a certain space is avoided for the pump body part of the compressor, and the compressor is miniaturized.
Further, compared with the existing insulating framework with the circular outline framework, the polygonal outline insulating framework provided by the embodiment of the invention can effectively reduce the outline volume of the insulating framework, save the internal volume of the compressor and increase the distance between part of the insulating framework and other parts in the compressor.
Further, the upper end part of the first annular wall of the insulating framework provided by the embodiment of the invention is provided with a circulation groove and a notch; on one hand, the ambient gas flow near the stator winding can be increased, the heat dissipation capacity of the stator winding is enhanced, and the temperature of the stator winding is reduced; on the other hand, the material consumption of the insulating framework can be reduced to a certain extent.
On the other hand, the embodiment of the invention provides a motor stator; the motor stator includes any one of the insulating frameworks, so the motor stator according to the embodiment of the invention has any one of the above beneficial effects and is not described herein.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic view of an insulating framework in the prior art;
FIG. 2 is a schematic diagram illustrating the assembly of the insulating framework and the stator core shown in FIG. 1;
fig. 3 is a schematic structural view of an insulating framework according to an embodiment of the present invention;
fig. 4 is a schematic view of a back structure of an insulating framework according to an embodiment of the present invention;
fig. 5 is an assembly schematic diagram of an insulating skeleton and a stator core provided in an embodiment of the present invention;
fig. 6 is an enlarged view of the structure of a three-phase lead terminal groove portion on an insulating skeleton provided by an embodiment of the present invention;
fig. 7 is an enlarged view of a three-phase lead terminal groove portion on an insulating frame according to an embodiment of the present invention;
FIG. 8 is a schematic view of a portion of an insulating framework provided in accordance with an embodiment of the present invention;
FIG. 9 is a partial schematic view of a mounting structure for connecting a compressor oil pump to an insulating framework provided in accordance with an embodiment of the present invention;
fig. 10 is a schematic diagram of an arrangement of a slot portion of another three-phase lead-out terminal on an insulating skeleton according to an embodiment of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted for achieving the preset aim of the invention, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Example 1
The embodiment provides an insulating framework which is used on a motor stator. Specifically, as shown in fig. 3, 6, 7 and 10, the insulating framework in the present embodiment includes an insulating framework body; wherein, the insulating skeleton body is provided with a three-phase lead wire terminal groove 34 for connecting the lead wire assembly. Wherein, three terminal grooves 341 are provided on the three-phase lead terminal groove portion 34, and each terminal groove 341 is used for installing a wire pressing terminal. The "center" of each terminal groove 341 herein is defined as being the centroid of each terminal groove 341 when the three terminal grooves 341 are all regular grooves, and at this time, the centroid, centroid or barycenter of each terminal groove 341 coincides. In this embodiment, three terminal grooves 341 on the three-phase lead-out terminal groove 34 on the insulating skeleton are a first terminal groove, a second terminal groove, and a third terminal groove, respectively; wherein the first terminal slot is used for leading out a first phase winding lead-out wire; the second terminal groove is used for leading out a second phase winding lead-out wire; the third terminal slot is used for leading out a third phase winding lead-out wire.
The insulation framework provided by the embodiment has the advantages that the centers of the three terminal grooves 341 on the three-phase lead-out terminal groove part 34 are not on the same straight line, so that the adjustment space of the distances between the terminal grooves 341 is large, the adjustment is convenient, the creepage distance between the line pressing terminals in the three terminal grooves of the three-phase lead-out terminal groove part can be effectively adjusted (namely, the minimum distance between the centers of the three terminal grooves can be conveniently adjusted by adjusting the side length of the triangle, and then the creepage distance between the line pressing terminals is adjusted), and the insulation and voltage withstand level between the three-phase winding enameled wires and between the line pressing terminals is improved; and finally, the operation reliability of the motor is improved.
Preferably, the line between the centers of the three terminal grooves 341 on the three-phase lead-out terminal groove portion 34 in the present embodiment forms an isosceles triangle, preferably an equilateral triangle; the three terminal grooves 341 are identical in structure. Through the arrangement, the creepage distance between the line pressing terminals in the three terminal grooves of the three-phase lead-out line terminal groove part can be better adjusted.
Preferably, the three-phase lead terminal groove 34 in the present embodiment is mainly used for Y-winding connection and delta-winding connection (delta-winding) connection.
Example 2
Preferably, the present embodiment provides an insulating framework, and compared with the previous embodiment, the present embodiment designs the insulating framework body as follows:
as shown in fig. 3 to 5, the insulating skeleton body in the present embodiment includes a first annular wall 31, a second annular wall 32, and a plurality of connecting pieces 33 for connecting the first annular wall 31 and the second annular wall 32. Wherein the second annular wall 32 is located inside the first annular wall 31. One end of the connecting member 33 is connected to the first annular wall 31 and the other end is connected to the second annular wall 32. The connection member 33 serves as a winding portion of the insulating bobbin for winding the stator winding.
Preferably, the connector 33 serves as a bottom plate of the insulating skeleton. The second annular wall 32 includes a plurality of spaced apart second walls; wherein the number of the second walls is identical to the number of the connecting pieces 33 and is connected in a one-to-one correspondence. Preferably, since the second annular walls are formed of a plurality of second walls disposed at intervals, in order to improve insulation performance between windings on adjacent connection members 33, both ends of each second wall are provided with fixing posts 322 to engage insulation members in stator core slots in gaps between the fixing posts 322 and the second walls, and the fixed insulation members close the gaps between the single walls.
The three-phase lead terminal groove 34 on the insulating skeleton body in this embodiment and the embodiments described below is connected to the first annular wall 31, and the three-phase lead terminal groove 34 is located outside the area surrounded by the first annular wall 31 (the first annular wall 31 encloses a polygonal annular area, and the three-phase lead terminal groove 34 is located outside the annular area).
Example 3
Preferably, compared with the previous embodiment, as shown in fig. 3, 6 and 7 to 8, the present embodiment further designs the three-phase lead terminal groove 34 as follows:
as described in embodiment 1, the three terminal grooves 341 on the three-phase lead terminal groove portion 34 in this embodiment are a first terminal groove, a second terminal groove, and a third terminal groove, respectively. Wherein the groove wall of the first terminal groove is connected to the first annular wall 31. Gaps are left between the second terminal slot, the third terminal slot and the first annular wall 31 for passing wires to facilitate embedding of winding wires in the second terminal slot and the third terminal slot. Wherein the center of the first terminal slot corresponds to the vertex of the triangle formed by the connection of the centers of the three terminal slots 341. Here, the groove wall of the first terminal groove is connected to the first annular wall 31 in two ways: (1) The groove wall of the first terminal groove is connected to the outer wall surface of the first annular wall 31; (2) One of the slot walls of the first terminal slot is part of a first annular wall 31, as shown in particular in fig. 3, 6 and 7 to 8.
In the insulation structure provided by the embodiment, one terminal groove of three terminal grooves which are distributed in a triangular manner on the three-phase lead terminal groove part 34 is connected with the first annular wall, and a gap is reserved between the other two terminal grooves and the first annular wall; the arrangement makes the three-phase lead-out terminal groove part and the first annular wall 31 connected into a whole, thereby eliminating the rule avoiding space of the three-phase lead-out terminal groove part 34 outside the first annular wall 31, namely eliminating the L-shaped section shape in the prior art, forming a solid structure, and effectively improving the structural strength of the three-phase lead-out terminal groove part 34 and the insulating framework.
Preferably, each of the terminal grooves 341 of the three-phase lead-out terminal groove portion 34 is provided with a wire insertion opening for inserting the winding wire into the terminal groove 341. Wherein the wire insertion opening on the first terminal groove communicates with the inside of the first annular wall 31 (i.e., the wire front opening on the first terminal groove communicates with the space between the first annular wall 31 and the second annular wall). The wire insertion opening of the second terminal groove communicates with the gap between the second terminal groove and the first annular wall 31; the wire embedding port of the third terminal groove communicates with the gap between the third terminal groove and the first annular wall 31.
Preferably, each terminal slot on the three-phase lead-out terminal slot portion is provided with a wire post 36 at the edge of the wire insertion opening for guiding the winding wire into the terminal slot. The wire column 36 can effectively reduce the difficulty of embedding the winding enamelled wires in the terminal grooves 341 of the three-phase lead-out terminal groove part, and improve the embedding efficiency of the winding enamelled wires. As shown in fig. 7, when the winding wire is inserted into the terminal groove 341, the winding wire is initially positioned by the wire post 36, and then the winding wire is slid down along the wire post 36 to be smoothly inserted into the terminal groove 341.
Preferably, the three-phase lead-out terminal groove 34 in the present embodiment has a first end and a second end disposed opposite to each other; wherein a first end of the three-phase lead terminal groove 34 is connected to the first annular wall 31. A first wire extending port, a second wire extending port and a third wire extending port for extending the winding wires are formed in the end part of the second end of the three-phase lead-out terminal groove part 34; wherein the first wire extension port is communicated with the first terminal groove; the second lead wire extending outlet is communicated with the second terminal groove; the third wire extension port communicates with the third terminal slot. Preferably, the first wire outlet, the second wire outlet and the third wire outlet are positioned on the same straight line.
As shown in fig. 3 and 6, the specific lead mode of the three-phase lead terminal slot portion on the insulating skeleton provided in this embodiment is as follows: the ends of the winding wire of one winding part closest to the three-phase lead wire terminal groove part 34 are embedded into the first terminal groove, and the ends of the winding wire of the winding part located at the left and right sides of the winding part are embedded into the second terminal groove and the third terminal groove of the three-phase lead wire terminal groove part 34 along the outer side of the first annular wall 31 through the wire passing groove 312 on the first annular wall and are fixed through the wire pressing terminal.
Example 4
Preferably, compared with embodiment 3, as shown in fig. 10, the embodiment provides an insulating framework, and the three terminal grooves on the three-phase lead terminal groove portion 34 are subjected to another triangular arrangement design:
in this embodiment, two terminal grooves 341 of three terminal grooves 34 on the three-phase lead-out terminal groove portion of the insulating frame are provided close to the first annular wall 31, and the other is provided away from the first annular wall 31. Specifically, the three terminal grooves 341 on the three-phase lead terminal groove portion 34 are a first terminal groove, a second terminal groove, and a third terminal groove, respectively. Wherein the first terminal groove, the second terminal groove are provided close to the first annular wall 31; the third terminal slot is located away from the first annular wall 31. Wherein the first annular wall 31 is provided with a notch at a position facing the three-phase lead-out terminal groove 34.
Preferably, the first terminal groove, the second terminal groove, and the third terminal groove are all provided with wire embedding openings at a first end facing the first annular wall 31, and a wire extending opening is provided at a second end (an end opposite to the first end).
The solution in this example has the following drawbacks with respect to the solution in example 3: (1) In order to enable the three-phase winding enamelled wire to be embedded into the terminal slot, a certain avoiding space must be reserved between the three-phase terminal slot part and the first annular wall, which makes the structural strength of the insulating framework low. (2) Because the wire outlets on the three terminal slots are not on the same plane any more, the end cutting of the three-phase winding enameled wire is difficult to implement.
Example 5
Preferably, compared with the above embodiments, as shown in fig. 3 and 5, the insulating frame body of the present embodiment is further provided with a neutral line short terminal groove portion 35 for Y-winding connection. Wherein at least one and at most three terminal grooves 351 are provided on the neutral short terminal groove portion 35. Preferably, two terminal grooves 351 are provided on the neutral short terminal groove portion 35, and a wire pressing terminal is provided in each terminal groove.
The neutral line short terminal groove portion 35 in the present embodiment is connected to the first annular wall 31, and the neutral line short terminal groove portion 35 is located outside the area surrounded by the first annular wall 31 (the first annular wall 31 encloses a polygonal annular area, and the neutral line short terminal groove portion 35 is located outside the annular area).
Preferably, as shown in fig. 3 and 5, the stator core 4 has a polygonal structure (preferably, a quadrilateral shape), and the end of the stator core 4 has a first angle and a second angle that are disposed opposite to each other. Wherein the arrangement positions of the three-phase lead terminal groove portion 34 and the neutral short-circuit terminal groove portion 35 at the first annular wall 31 satisfy the following conditions: when the insulating frame 3 is mounted on the end of the stator core 4, the three-phase lead-out terminal groove 34 is located at a first corner of the end of the stator core 4; or the three-phase lead terminal groove 34 is located at a position near the first corner on the end of the stator core 4. When the insulating frame 3 is mounted on the end of the stator core 4, the neutral line short terminal groove 35 is located at the second corner of the end of the stator core 3; or the neutral line short terminal groove portion 35 is located at a position near the second angle on the end portion of the stator core 4. By the arrangement, the space of the end part of the stator core 4 near the edges can be improved, a certain space is avoided for the pump body part of the compressor, and the compressor is miniaturized.
Preferably, each of the terminal grooves 351 of the neutral short terminal groove portion 35 is provided with a wire insertion opening for inserting a wire into the terminal groove; wherein each terminal groove 351 on the neutral short terminal groove portion 35 is provided with a wire post at an edge of the wire insertion opening for guiding the winding wire into the terminal groove. Here, the wire pole is provided in the neutral line short terminal groove 35, so that not only the wire inserting efficiency of the winding wire can be improved, but also the wire inserting avoiding space between the winding wire and the insulating skeleton body (first annular wall) can be reduced, and the material and the volume of the insulating skeleton can be further reduced.
Example 6
Preferably, compared with the above embodiments, as shown in fig. 3 to 5, 8 and 9, the insulating framework is further designed as follows:
the first annular wall 31 on the insulating skeleton in this embodiment is polygonal; in order to further reduce the space taken up by the insulating skeleton and to cooperate with the slot-type of the stator core 4, each corner on the first annular wall 31 is provided with a chamfer; the chamfer lines are matched according to the groove bottom shape of the winding groove of the stator core 4, and can be straight lines or curved lines. Preferably, the first annular wall on the insulating framework in the embodiment is a polygonal shape formed by overlapping two regular polygons with different shapes. Further preferably, the first annular wall on the insulating framework in this embodiment is a polygonal shape formed by overlapping two regular hexagons of different shapes. Here, the polygonal-shaped insulating framework provided in this embodiment can effectively reduce the external volume of the insulating framework compared with the existing circular-shaped insulating framework, save the internal volume of the compressor, and increase the distance between the part of the insulating framework and other parts in the compressor.
Preferably, at least one wire passing groove 312 is provided on the first annular wall 31 of the insulating frame for the stator winding wire passing in this embodiment. The wire passing groove 312 is a groove formed at the upper end of the first annular wall 31, and preferably, the wire passing groove 312 is a U-shaped groove formed at the upper end of the first annular wall 31. Further, a boss 311 for preventing the jumper wires of the windings of the respective phases from falling off is provided on the outer side surface of the first annular wall 31, and the boss is square. In a specific use process of the insulating framework, the tail ends of the three-phase winding enameled wires are led to the outer side of the first annular wall 31 of the insulating framework through the U-shaped wire passing grooves 312 and are led to the terminal groove parts along the first annular wall 31. And the boss 311 is mainly used to prevent the winding enamel wire guided along the outer side of the first annular wall 31 from falling off the first annular wall 31.
Preferably, the first annular wall 31 of the insulating frame in this embodiment is provided with a flow channel 316 for enhancing the ambient air flow near the stator winding so as to dissipate heat of the stator winding well. Preferably, in this embodiment, at least one notch 313 is disposed at the upper end of the first annular wall 31 of the insulating frame, and the notch 313 is stepped. Here, the circulation groove 316 and the notch 313 can increase the ambient gas flux near the stator winding, enhance the heat dissipation capability of the stator winding, and reduce the temperature of the stator winding; on the other hand, the material consumption of the insulating framework can be reduced to a certain extent.
Preferably, a limiting structure for restraining the compressor oil pump is provided on the first annular wall 31 of the insulating skeleton in the present embodiment. Wherein, this limit structure includes: a first limit groove 314 and a second limit groove. Wherein, the first limiting groove 314 is formed at the lower end of the first annular wall 31, and the second limiting groove is formed at the lower end of the first annular wall 31. The compressor oil pump is suspended on the arch 5 (preferably, the arch 5 is made of elastic material), and one end of the arch 5 is embedded in the first limiting groove 314, and the other end is embedded in the second limiting groove. The arch part 5 can also move freely to a certain extent after being embedded into the first limit groove 314 and the second limit groove. Preferably, as shown in fig. 3 and 9, the first limiting groove 314 and the second limiting groove are relatively formed on the first annular wall 31, and when the arch part 5 is installed in the first limiting groove 314 and the second limiting groove, the arch part 5 can rotate left and right along the direction indicated by the arrow in fig. 9, and the rotating angle range is a set angle, preferably, the set angle is 60 °.
Preferably, in this embodiment, the first positioning groove 321 is disposed on the second annular wall 32 of the insulating framework, and the positioning groove 321 is a U-shaped groove, and is disposed at an upper end of one of the second annular walls 32, and is mainly used for positioning the relative positions of two insulating frameworks respectively mounted on two ends of the stator core 4. Wherein, two upper and lower insulating frameworks are in the installation, and the relative position of two upper and lower insulating frameworks can be correctly confirmed through making the connecting piece (wire winding portion) of two insulating frameworks's first constant head tank department be located same tooth portion on the stator core.
Example 7
On the other hand, as shown in fig. 4, the present embodiment provides a motor stator, wherein the motor stator in the present embodiment includes a stator core 4 and the insulating frame 3 described in any of the above embodiments. Wherein, at least one end of the stator core 4 is connected with an insulating framework 4.
Preferably, as shown in fig. 4 and 5, the bottom of the insulating skeleton (i.e., the back surface of the connection member) is provided with a plurality of boss structures 37, and the boss structures 37 are uniformly distributed. Preferably, the boss structure 37 is a tapered structure with a smaller upper part and a larger lower part. Preferably, the number of boss structures 37 is 3; or the number of boss structures 37 is identical to the number of connectors 33. Accordingly, the stator core 4 is provided with fixing holes which are consistent in number with the boss structures 37 and are correspondingly arranged. Preferably, the fixing hole is a cylindrical hole. The boss structure 37 is embedded in the cylindrical fixing hole to fix the insulating skeleton 3 and the stator core 4. Wherein, the top outer diameter of the boss structure 37 is slightly smaller than the inner diameter of the fixed hole on the stator core, so as to facilitate embedding the boss structure 37 into the fixed hole; and the outer diameter of the root of the boss structure 37 is slightly larger than the inner diameter of the fixing hole on the stator core, so that the boss structure 37 and the fixing hole form interference fit.
Preferably, as shown in fig. 4 and 5, the insulating frame is provided with a second positioning groove 315 (second positioning groove 315), and the stator core is provided with a third positioning groove; wherein the second positioning groove 315 and the third positioning groove cooperate to determine the relative positions of the insulating frame and the stator core when the insulating frame is assembled with the stator core. Specifically, the second positioning groove 315 is an arc-shaped groove, and the third positioning groove is also an arc-shaped groove. The second positioning groove 315 can help accurately and quickly determine the relative positions of the insulating frame 3 and the stator core 4. When the insulating framework 3 is installed, the installation direction of the insulating framework 3 on the stator core 4 can be accurately determined only by placing the second positioning groove 315 on the insulating framework 3 and the third positioning groove on the stator core in the same direction. Here, the relative positions of the two insulating bobbins respectively attached to the both ends of the stator core 4 may be also positioned by the second positioning groove 315.
In summary, the insulating framework and the motor stator provided by the embodiments of the invention have the advantages that the three-phase lead-out terminal groove parts are arranged in a triangle, so that the creepage distance between the line pressing terminals in the terminal groove can be effectively increased, the insulating and voltage-resistant performances between the three-phase winding enameled wires and between the line pressing terminals are improved, and finally the operation reliability of the motor is improved.
In summary, it is readily understood by those skilled in the art that the above-described advantageous ways can be freely combined and superimposed without conflict.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (16)
1. An insulating skeleton, characterized in that the insulating skeleton comprises:
the insulation framework body is provided with a three-phase lead-out terminal groove part; three terminal grooves are formed in the three-phase lead-out terminal groove parts, and each terminal groove is used for installing a line pressing terminal;
wherein the centers of the three terminal slots on the three-phase lead-out terminal slot part are not on the same straight line;
wherein, the connecting line between the centers of the three terminal grooves on the three-phase lead-out terminal groove part forms an isosceles triangle;
wherein, the insulating skeleton body includes:
a first annular wall;
a second annular wall located inboard of the first annular wall;
a plurality of connectors, one end of each connector is connected with the first annular wall, and the other end is connected with the second annular wall; wherein each of the connectors is for winding a stator winding;
wherein the second annular wall comprises a plurality of second walls disposed at intervals; wherein the number of the second walls is consistent with that of the connecting pieces and is correspondingly connected one by one;
the three-phase lead-out terminal groove part is connected with the first annular wall and is positioned outside an area surrounded by the first annular wall;
wherein, three terminal grooves on the three-phase lead-out terminal groove part adopt a first arrangement or a second arrangement; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first setup is as follows: the three terminal grooves on the three-phase lead-out terminal groove part are a first terminal groove, a second terminal groove and a third terminal groove respectively; wherein the groove wall of the first terminal groove is connected with the first annular wall; gaps are reserved among the second terminal groove, the third terminal groove and the first annular wall;
the second setting is as follows: the three terminal grooves on the three-phase lead-out terminal groove part are a first terminal groove, a second terminal groove and a third terminal groove respectively; wherein the first and second terminal grooves are disposed adjacent to the first annular wall; the third terminal slot is disposed away from the first annular wall;
the first annular wall is provided with a notch at a position opposite to the three-phase lead-out terminal groove part.
2. The insulating frame according to claim 1, wherein when three terminal grooves on the three-phase lead-out terminal groove portion are in a first arrangement:
each terminal slot on the three-phase lead-out terminal slot part is provided with a wire embedding port for embedding a winding wire into the terminal slot; wherein, the liquid crystal display device comprises a liquid crystal display device,
a wire insertion opening in the first terminal slot communicates with a space between the first annular wall and the second annular wall;
the wire embedding port of the second terminal groove is communicated with the gap between the second terminal groove and the first annular wall;
the wire embedding port of the third terminal slot is communicated with the gap between the third terminal slot and the first annular wall.
3. The insulating frame according to claim 2, wherein each terminal groove on the three-phase lead-out terminal groove portion is provided with a wire post at an edge of the wire insertion opening for guiding the winding wire into the terminal groove.
4. The insulating frame according to claim 1, wherein when three terminal grooves on the three-phase lead-out terminal groove portion are in a first arrangement:
the three-phase lead-out terminal groove part is provided with a first end and a second end which are oppositely arranged; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first end part of the three-phase lead-out terminal groove part is connected with the first annular wall;
a first lead extending port, a second lead extending port and a third lead extending port are formed in the second end part of the three-phase lead-out terminal groove part; wherein the first wire extension port communicates with the first terminal slot; the second wire extending outlet is communicated with the second terminal groove; the third wire extension port is in communication with the third terminal slot.
5. The insulating frame of any one of claims 1 to 4, wherein the insulating frame body is further provided with a neutral line short terminal groove portion;
when the insulating framework comprises a first annular wall, the neutral line short-circuit terminal groove part is connected with the first annular wall, and the neutral line short-circuit terminal groove part is located outside an area surrounded by the first annular wall.
6. The insulating frame of claim 5, wherein the stator core has a polygonal shape and the ends of the stator core have a plurality of corners; the two angles are a first angle and a second angle;
wherein, three-phase lead terminal slot portion and neutral line short circuit terminal slot portion satisfy in the setting position of first annular wall:
when the insulating framework is arranged on the end part of the stator core, the three-phase lead-out terminal slot part is positioned at a first corner of the end part of the stator core; or the three-phase lead-out terminal groove part is positioned at a position close to the first angle on the end part of the stator core;
when the insulating framework is installed on the end part of the stator core, the neutral line short-circuit terminal groove part is positioned at a second corner of the end part of the stator core; or the neutral line short terminal slot is located at a position on the stator core end near the second angle.
7. The insulating frame of claim 6, wherein the first and second corners on the ends of the stator core are two opposite corners.
8. The insulating frame of claim 5, wherein at least one and at most three terminal slots are provided on the neutral line short circuit terminal slot portion; wherein, the liquid crystal display device comprises a liquid crystal display device,
each terminal groove of the neutral line short-circuit terminal groove part is provided with a wire embedding port for embedding a wire into the terminal groove;
wherein, every terminal groove on the neutral line short circuit terminal slot part is provided with the wire post in the edge department of wire embedding mouth for guide embedding terminal inslot of winding wire.
9. The insulating skeleton of claim 1, wherein the first annular wall is polygonal and each corner on the first annular wall is provided with a chamfer.
10. The insulating skeleton of claim 1, wherein the first annular wall is provided with at least one wire-passing groove for stator winding wire passing; and/or
At least one boss is arranged on the first annular wall and used for preventing the jumper wire of each phase winding from falling off.
11. The insulating frame of claim 1, wherein the first annular wall is provided with flow channels for increasing the gas flow near the stator windings; and/or
The upper end of the first annular wall is provided with at least one cut-out for increasing the gas flow at the end position of the motor.
12. The insulating skeleton of claim 1, wherein the first annular wall is further provided with a limiting structure for restraining a compressor oil pump; wherein, limit structure includes:
the first limiting groove is formed in the first annular wall;
the second limiting groove is formed in the first annular wall;
the compressor oil pump is hung on the arch piece, one end of the arch piece is embedded in the first limiting groove, and the other end of the arch piece is embedded in the second limiting groove.
13. The insulating frame of claim 1, wherein the insulating frame comprises a plurality of insulating ribs,
the second annular wall is provided with a first positioning groove for positioning the relative positions of two insulating frameworks respectively arranged at two ends of the stator core.
14. An electric motor stator, characterized in that it comprises:
an insulating skeleton, which is the insulating skeleton according to any one of claims 1 to 13;
and at least one end of the stator core is connected with the insulating framework.
15. The motor stator according to claim 14, wherein a plurality of boss structures with small upper part and large lower part are provided on the bottom of the insulating frame;
a plurality of fixing holes are formed in the stator core; wherein, the inner diameter of the fixed hole is smaller than the outer diameter of the lower end of the boss structure; the inner diameter of the fixing hole is larger than the outer diameter of the upper end of the boss structure;
the fixing holes and the boss structures are consistent in number and are matched in one-to-one correspondence, so that the insulating framework is fixed on the stator core.
16. An electric motor stator according to claim 14 or 15, characterized in that,
the insulation framework is provided with a second positioning groove, and the stator core is provided with a third positioning groove; the second positioning groove is matched with the third positioning groove so as to determine the relative positions of the insulating framework and the stator core when the insulating framework is assembled with the stator core.
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| CN201710637044.9A CN107492968B (en) | 2017-07-31 | 2017-07-31 | Insulating framework and motor stator |
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| CN201710637044.9A CN107492968B (en) | 2017-07-31 | 2017-07-31 | Insulating framework and motor stator |
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| US11434911B2 (en) | 2018-02-14 | 2022-09-06 | Nidec Sankyo Corporation | Pump device |
| US11496027B2 (en) * | 2018-09-28 | 2022-11-08 | Nidec Servo Corporation | Motor |
| CN109639008B (en) * | 2018-11-30 | 2023-12-29 | 捷和电机制品(深圳)有限公司 | Annular wiring structure of motor stator winding |
| CN109578247A (en) * | 2019-01-18 | 2019-04-05 | 长虹华意压缩机股份有限公司 | A kind of structure of the new-type assembly skeleton applied to refrigerator inverter compressor motor |
| CN110048534A (en) * | 2019-05-12 | 2019-07-23 | 苏州新智机电工业有限公司 | A kind of motor stator winding connecting plate |
| CN112117853B (en) * | 2019-06-19 | 2022-05-06 | 尼得科电机（青岛）有限公司 | Stator assembly of motor, manufacturing method thereof and stator of motor |
| CN110247500B (en) * | 2019-07-31 | 2024-02-13 | 广州市瑞宝电器有限公司 | Stepping motor |
| CN112787449B (en) * | 2019-11-04 | 2022-06-21 | 上海海立电器有限公司 | Stator module and permanent magnet synchronous motor |
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