CN114157055B

CN114157055B - Stator, motor, compressor and refrigeration plant

Info

Publication number: CN114157055B
Application number: CN202111468260.8A
Authority: CN
Inventors: 毛临书; 邱小华
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-12-30
Anticipated expiration: 2041-12-03
Also published as: CN114157055A

Abstract

The invention provides a stator, a motor, a compressor and refrigeration equipment, wherein the stator comprises: the plurality of segmented punching sheets are spliced along the circumferential direction of the stator to form the stator punching sheet; any one piece punching in a plurality of piece punching includes: a tooth portion; the yoke part is arranged on one side of the tooth part, which is far away from the axle center of the stator; a convex portion provided at one edge of the yoke portion extending in the radial direction; the concave part is arranged at the other edge of the yoke part, which extends along the radial direction, and the convex part on one segmented punching sheet is matched with the concave part on the adjacent segmented punching sheet in shape; the convex part includes: a first curve segment; and the second curve section is connected with the first curve section, and compared with the first curve section, the second curve section is far away from the axis of the stator, and the curvature of the first curve section is smaller than that of the second curve section. According to the invention, the curvature of a part of the structure of the convex part is reduced, the problem of interference of two adjacent segmented punching sheets in butt joint is avoided, and the assembly difficulty of the stator is reduced.

Description

Stator, motor, compressor and refrigeration plant

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a stator, a motor, a compressor and refrigeration equipment.

Background

For the stator that is formed by a plurality of piecemeal cores, can set up U type connecting portion between two adjacent piecemeal cores usually, in the assembling process, this kind of structure leads to connecting portion on two adjacent piecemeal punching sheets to interfere mutually easily, increases the assembly degree of difficulty of stator.

Disclosure of Invention

The present invention has been made to solve one of the technical problems occurring in the prior art or the related art.

In a first aspect, the present invention provides a stator comprising: the plurality of segmented punching sheets are spliced along the circumferential direction of the stator to form the stator punching sheet; any one piece punching in a plurality of piece punching includes: a tooth portion; the yoke part is arranged on one side of the tooth part, which is far away from the axle center of the stator; a convex portion provided at one edge of the yoke portion extending in the radial direction; the concave part is arranged at the other edge of the yoke part, which extends along the radial direction, and the convex part on one segmented punching sheet is matched with the concave part on the adjacent segmented punching sheet in shape; the convex part includes: a first curve segment; and the second curve section is connected with the first curve section, and compared with the first curve section, the second curve section is far away from the axis of the stator, and the curvature of the first curve section is smaller than that of the second curve section.

The stator provided by the invention is of a split structure in order to reduce the processing difficulty of the stator and improve the slot fullness rate of the motor. The stator comprises a plurality of segmented laminations. Through setting up the piece towards the piece into a plurality ofly to when processing the stator, only process a plurality of pieces towards the piece can, assemble a plurality of pieces towards piece part into the stator again, compare in processing a complete stator, the degree of difficulty of processing piece towards piece part reduces, thereby reduced manufacturing cost, this kind of stator simple structure, accessible automation line realizes the automated production to the stator.

And, design the split type mosaic structure with the stator, be convenient for realize winding of coil and establish, can establish the back at the coil winding and install two adjacent piecemeal punching sheets again, reduce the degree of difficulty of establishing the coil, consequently can the stator size the same under the circumstances, wind and establish more coils, improve the winding of coil and establish the number of turns, be favorable to improving the groove fullness rate of motor. On the basis of not improving the size of the motor, the number of turns of the winding coil is increased, so that the output torque and the motor efficiency of the motor can be improved.

The yokes have two radially extending edges, one edge being provided with a projection and the other edge with a recess, i.e. each yoke is provided with a projection and a recess. The stator punching sheet is formed by sequentially connecting the plurality of block punching sheets, and in the process of assembling the plurality of block punching sheets, the convex part on one block punching sheet is inserted into the concave part on the adjacent block punching sheet, so that the radial relative sliding of the two adjacent block punching sheets along the stator is avoided, and the structural stability of the stator punching sheet is improved.

When splicing two adjacent segmented punching sheets, one segmented punching sheet is rotated along a hinged point, so that the segmented punching sheet is rotated to a position butted with the adjacent segmented punching sheet. The convex part consists of two sections of curve segments, namely a first curve segment and a second curve segment, wherein the first curve segment is close to the axis of the stator punching sheet, and the second curve segment is close to the periphery of the stator punching sheet. The shape of the concave part is matched with that of the convex part, so that the concave part also comprises two sections of curve sections, and the curvatures of the two sections of curve sections on the concave part correspond to those of the two sections of curve sections on the convex part.

The curvature of the first curve segment is smaller than the curvature of the second curve segment, i.e. the curve of the first curve segment is more gradual. The height of the protruding yoke part of the second curve section is smaller, when the concave part of one block punching sheet rotates to the first curve section, the first curve section is not easy to interfere with the continuous rotation of the block punching sheet, and the convex part and the concave part of two adjacent block punching sheets can be smoothly inserted. Compared with a U-shaped structure in the related art, the curvature of a part of the convex part is reduced, the problem of interference of two adjacent segmented punching sheets in butt joint is avoided, and the assembly difficulty of the stator is reduced.

Moreover, the curvature of the second curve segment is relatively large, so that the connection stability of two adjacent segmented punching sheets can be improved. In the process of assembling the stator, the plurality of segmented punching sheets are spliced to form the stator punching sheet, the plurality of stator punching sheets are stacked in the axial direction to form a stator core, the stator core needs to be assembled into the stator shell, the stator shell has a driving force on the segmented punching sheets, and the curvature of the second curve segment is relatively large, so that the segmented punching sheets are not easy to move towards the direction of the axis of the stator relative to the adjacent segmented punching sheets, and the connection stability of the two adjacent segmented punching sheets is ensured.

In the related art, when the connection structure on two adjacent lamination sheets interferes, the hinge point of the two adjacent lamination sheets needs to move towards the direction far away from the axis of the stator lamination sheet, so that the interference problem is solved, but the precision of the butt joint process is reduced, and the two adjacent stator lamination sheets are easy to misplace during butt joint, so that the assembly process can be completed through multiple butt joints. Because the first curve section with smaller curvature is arranged, the problem of interference is not easy to occur when two adjacent segmented punching sheets are butted, and therefore, a hinge point does not need to be moved to the direction far away from the axis of the stator punching sheet. The adjacent two blocking towards pieces can regard yoke portion periphery and radial edge's intersect as the pin joint, and in the assembling process, the blocking towards piece has the contact point with adjacent blocking towards piece when rotating, has just so confirmed the benchmark, and the butt joint process of two adjacent blocking towards pieces can be accomplished smoothly, avoids two adjacent blocking towards pieces to take place because of the condition of dislocation and multiple butt joint. The accuracy of two adjacent lamination when assembling is improved, the assembly degree of difficulty to the stator is further reduced.

In addition, according to the stator in the above technical solution provided by the present invention, the following additional technical features may be further provided:

in one possible design, the first end of the first curved section is connected to the first end of the second curved section; and setting the tangent line of the second end of the first curve segment as L1, the tangent line of the second end of the second curve segment as L2, and the included angle between L1 and L2 as theta, wherein the included angle is satisfied, and the included angle is more than 90 degrees and less than 180 degrees and more than theta and less than 180 degrees.

In this design, the supplementary angle of the included angle between the tangent line L1 and the tangent line L2 can represent the curvature of both ends of the convex portion. If the supplementary angle of the included angle theta is smaller than or equal to 90 degrees, the curvatures of the end parts of the first curve section and the second curve section are smaller, namely the first curve section and the second curve section tend to straight lines, so that the height of the convex yoke part of the convex part is smaller, the convex part is difficult to play a limiting role on the segmented punching sheet, and when the periphery of the segmented punching sheet is pushed, the two segmented punching sheets slide relatively along the radial direction, so that the structural stability of the stator punching sheet is poor. If the supplementary angle of the included angle theta is 180 degrees, the first curve section and the second curve section are perpendicular to the yoke part, the curvatures of the end parts of the first curve section and the second curve section are large, and the convex part is easy to interfere with the assembling process of the segmented punching sheet. Therefore, the supplementary angle of the included angle of the tangent line L1 and the tangent line L2 is limited between 90 degrees and 180 degrees, the height of the convex part protruding yoke part can be effectively limited, and two adjacent segmented punching sheets are prevented from sliding relatively along the radial direction. And the convex part is not easy to interfere the assembly process of the block punching sheet, the assembly difficulty is further improved, and the convenience of the assembly process is improved.

In one possible design, the side length of the recess is L3, the edge of the yoke in which the recess is provided is a first edge, the side length of the first edge is L4, and 0.1 × L4 ≦ L3 < 0.8 × L4 is satisfied.

In this design, a relationship of a side length of the recess and a side length of the first edge of the yoke, on which the recess is provided, is defined. Although the convex part and the concave part are arranged between two adjacent partitioned punching sheets, the assembly of the two partitioned punching sheets can be realized. However, a certain gap exists between the convex part and the concave part, namely, a gap exists between two adjacent segmented punching sheets, and the magnetic resistance at the gap is large, so that the magnetic flux of the stator is reduced, the magnetic performance of the stator is reduced, the iron loss is increased, and further the performance of the motor is reduced. Therefore, in order to avoid the problem of the performance degradation of the motor due to the large magnetic resistance, the side length of the concave portion needs to be limited, that is, the side length L3 < 0.8 × L4 of the concave portion. By limiting the proportional relation between the side length of the concave part and the side length of the first edge of the concave part, the problem that the gap between two adjacent partitioned punching sheets is large due to the fact that the concave part is too long is avoided, the phenomenon that the magnetic resistance is too large is avoided, and the motor is guaranteed to have good performance.

When two adjacent block punching sheets are assembled, the convex part is inserted into the concave part, so that the matching relation between the convex part and the concave part can limit the two adjacent block punching sheets. The sizes of the convex part and the concave part are matched, the edge of the yoke part, which is provided with the convex part, is the second edge, and the proportional relation between the side length of the convex part and the side length of the second edge is the same as or similar to the proportional relation between the side length of the concave part and the lengthening of the first edge. If the length of concave part is undersized, the length of convex part is less, and this just leads to the width of convex part less, and the structural stability of convex part is relatively poor, and when the periphery of piecemeal punching piece received thrust, the convex part was difficult to play the spacing effect steadily. Therefore, the invention limits L3 to be more than or equal to 0.1 xL 4, avoids the side length of the concave part to be too small, ensures the structural stability of the convex part, and can stably limit two adjacent segmented punching sheets by the convex part.

In the present invention, for convenience of description, the thicknesses of the segmented punching sheets are omitted, so that the side lengths of the concave portion and the first edge refer to the side lengths of the radial cross section of the stator.

In one possible design, the number of stator slots in the stator is Z, the number of pole pairs of the stator is P, the minimum width of the teeth is W, and L4 < WxZ/P ≦ 3 xL 4.

In the design, the thickness of the yoke part can influence the winding space and the magnetic field saturation, when the thickness of the yoke part is larger, the space in the stator slot can be reduced, the winding space is smaller, and therefore the power density of the motor is reduced. When the thickness of the yoke is small, a problem occurs in that the magnetic field is too saturated.

Likewise, the larger the width of the tooth, the smaller the winding space of the stator slot.

With the same size of the stator, the winding space of each stator slot is reduced as the number of the stator slots is increased.

When the number of pole pairs of the stator is increased, in order to ensure that the number of pole pairs of the stator is matched with the number of pole pairs of the rotor, the number of pole pairs of the rotor is increased, so that the volume of the rotor is increased, and in order to avoid the rotor, the space of the stator is reduced.

The parameters all can influence the winding space of the stator slot, and the parameters are singly adjusted, so that other performances of the motor are easily and obviously reduced.

In one possible design, the yoke is cut along the radial direction of the stator, and a circle C is made with the center of the yoke to obtain a plurality of circles C, wherein the intersection point of any circle C passing through the convex portion and the convex portion is one.

In the design, the circle center of the yoke passes through the axis of the stator, the circle center of the yoke is used as a circular point, and a circle is made at any radius, so that a plurality of circles can be obtained, wherein only one intersection point of any circle passing through the convex part and the convex part is formed. Through the mode, the height of the convex part protruding the yoke part and the curvature of the convex part are limited within a certain range, if the height of the convex part protruding the yoke part is larger or the curvature of the convex part is larger, the condition that the intersection point of the circle C and the convex part is larger than 1 can occur, and under the condition, the problem of mutual interference easily occurs when the two adjacent segmented punching sheets are butted. According to the invention, the shape and size of the convex part are further limited by the number of the intersection points of the circle C and the convex part, and the difficulty in butting two adjacent partitioned punching sheets is reduced.

In one possible design, the yoke further comprises: a first straight line segment connected with the convex part; and the first straight line segment on one segmented punching sheet is contacted with the second straight line segment on the adjacent segmented punching sheet.

In this design, the edge of the yoke portion where the convex portion is provided is a second edge on which the first straight line segment is provided. The edge of the concave portion arranged in the yoke portion is a first edge, a second straight line section is arranged on the first edge, and when two adjacent segmented punching sheets are assembled, the first straight line section is in contact with the second straight line section. Receiving machining precision's influence, having the clearance easily between the curve section between two adjacent lamination pieces, consequently need the machine-shaping straightway on the yoke portion, straightway between two lamination pieces contacts, is difficult for having the clearance between first straightway and the second straightway for two adjacent lamination pieces can contact steadily. And, through reducing the clearance between two adjacent piecemeal punching sheets, can reduce the magnetic resistance, avoid the magnetic flux of stator to reduce, place the magnetic property decline of stator, the difficult increase of iron loss to avoid motor performance to descend.

In one possible design, a first chamfer is arranged between the first straight line segment and the convex part; a second chamfer is arranged between the second straight line section and the concave part.

In this design, since the first chamfer is provided between the first straight line segment and the convex portion, the first straight line segment and the convex portion smoothly transition. Likewise, a second chamfer is provided between the second straight section and the recess, so that there is a smooth transition between the second straight section and the recess. When two adjacent blocking towards the piece and assemble, the blocking towards the piece can rotate smoothly along first chamfer and second chamfer, is difficult for appearing the card pause in the assembling process, further improves the convenience in the assembling process.

In one possible design, the first straight line segment includes: the convex part is positioned between the first sub straight-line segment and the second sub straight-line segment; the second straight line segment comprises: the concave part is positioned between the third sub straight line segment and the fourth sub straight line segment.

In the design, the convex part is positioned between the first sub-linear segment and the second sub-linear segment, and the concave part is positioned between the third sub-linear segment and the fourth sub-linear segment, so that the convex part is arranged in the middle of the second edge, and the concave part is arranged at the end part of the first edge, and the arrangement mode can improve the processing convenience of the convex part and the concave part. When the assembly of two adjacent piecemeal punching sheets is accomplished, the difficult gap that appears in the interior circumference butt joint department of two adjacent yoke parts avoids the coil to stretch into between two adjacent yoke parts, improves the convenience of wire winding in-process.

In a second aspect, the present invention provides an electric machine comprising: a stator assembly comprising a stator as in any possible design of the first aspect and windings wound on the stator; and a rotor disposed within the stator.

In a third aspect, the present invention provides a compressor comprising: an electric machine as in any possible design of the second aspect; or a stator as in any of the possible designs of the first aspect.

In a fourth aspect, the present invention provides a refrigeration apparatus comprising: the compressor of the third aspect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural diagram of a partitioning sheet in an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating a portion of a segment punching sheet according to an embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of two adjacent partitioning stampings in the embodiment of the present invention;

fig. 4 shows a schematic structural diagram of a motor in an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:

100 stators, 110 segmented punching sheets, 111 tooth parts, 112 yoke parts, 1121 first straight line segments, 1122 second straight line segments, 113 convex parts, 1131 first curved line segments, 1132 second curved line segments, 114 concave parts, 120 hinge points, 200 windings, 300 rotors and 400 magnets.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A stator, a motor, a compressor, and a refrigeration apparatus provided according to some embodiments of the present invention are described below with reference to fig. 1 to 4.

Referring to fig. 1, 2 and 3, in some embodiments of the present invention, a stator 100 is provided, including: and the plurality of blocking punching sheets 110 are spliced to form the stator punching sheet along the circumferential direction of the stator 100. Any one of the plurality of the segment punching sheets 110 includes: a tooth part 111, a yoke part 112 convex part 113 and a concave part 114, wherein the yoke part 112 is arranged on one side of the tooth part 111, which is far away from the axis of the stator 100; the convex portion 113 is provided at one edge extending in the radial direction in the yoke portion 112; the concave part 114 is arranged at the other edge of the yoke part 112 extending along the radial direction, and the convex part 113 on one segmented punching sheet 110 is matched with the concave part 114 on the adjacent segmented punching sheet 110 in shape; the convex portion 113 includes: first curve section 1131 and second curve section 1132, second curve section 1132 are connected with first curve section 1131, compare first curve section 1131, and second curve section 1132 is far away from the axle center of stator 100, and the curvature of first curve section 1131 is less than the curvature of second curve section 1132.

In the stator 100 provided in this embodiment, in order to reduce the processing difficulty of the stator 100 and improve the slot filling rate of the motor, the stator 100 is configured to be a split structure. The stator 100 includes a plurality of segment laminations 110. Through setting up the piece towards piece 110 into a plurality ofly to when processing stator 100, only process a plurality of piece towards piece 110 can, assemble into stator 100 with a plurality of piece towards piece 110 parts again, compare in processing a complete stator 100, the degree of difficulty of processing piece towards piece 110 parts reduces, thereby manufacturing cost has been reduced, this kind of stator 100 simple structure, accessible automation line realizes the automated production to stator 100.

Moreover, the stator 100 is designed to be a split type splicing structure, so that winding of the coil is facilitated, two adjacent segmented punching sheets 110 can be installed after winding of the coil is completed, the difficulty of winding the coil is reduced, more coils can be wound under the condition that the size of the stator 100 is the same, the number of winding turns of the coils is increased, and improvement of the slot filling factor of the motor is facilitated. On the basis of not improving the size of the motor, the number of turns of the winding coil is increased, so that the output torque and the motor efficiency of the motor can be improved.

The yoke portion 112 has two radially extending edges, one of which is provided with a convex portion 113 and the other of which is provided with a concave portion 114, i.e., each yoke portion 112 is provided with a convex portion 113 and a concave portion 114. The plurality of segmented punching sheets 110 are sequentially connected to form the stator punching sheet, and in the process of assembling the plurality of segmented punching sheets 110, the convex part 113 on one segmented punching sheet 110 is inserted into the concave part 114 on the adjacent segmented punching sheet 110, so that the adjacent two segmented punching sheets 110 are prevented from relatively sliding along the radial direction of the stator 100, and the structural stability of the stator punching sheet is improved.

When two adjacent segmented punching sheets 110 are spliced, one segmented punching sheet 110 is rotated along the hinge point 120, so that the segmented punching sheet 110 is rotated to a position where the segmented punching sheet 110 is butted with the adjacent segmented punching sheet 110, and the direction indicated by an arrow in fig. 3 is the rotation direction of the segmented punching sheet 110 during assembly. The convex portion 113 is composed of two curve segments, which are a first curve segment 1131 and a second curve segment 1132 respectively, the first curve segment 1131 is close to the axis of the stator lamination, and the second curve segment 1132 is close to the outer periphery of the stator lamination. The shape of the recess 114 is adapted to the shape of the protrusion 113, so that the recess 114 also comprises two curved segments, the curvature of the two curved segments on the recess 114 corresponding to the curvature of the two curved segments on the protrusion 113.

The curvature of the first curved segment 1131 is less than the curvature of the second curved segment 1132, i.e., the curve of the first curved segment 1131 is more gradual. The height of the second curved section 1132, which protrudes out of the yoke portion 112, is smaller, and when the concave portion 114 of one piece of the segmented sheet 110 rotates to the first curved section 1131, the first curved section 1131 is not prone to generating interference on the continuous rotation of the segmented sheet 110, so that the convex portion 113 and the concave portion 114 of two adjacent segmented sheets 110 can be smoothly inserted. Compared with a U-shaped structure in the related art, the curvature of a part of the convex part 113 is reduced, the problem of interference of two adjacent segmented laminations 110 during butt joint is avoided, and the assembly difficulty of the stator 100 is reduced.

Moreover, the curvature of the second curve segment 1132 is set relatively large, so that the connection stability of two adjacent segmented sheets 110 can be improved. In the process of assembling the stator 100, the plurality of segmented punching sheets 110 are spliced to form the stator punching sheet, the plurality of stator punching sheets are stacked along the axial direction to form a stator 100 iron core, the stator 100 iron core needs to be assembled into a stator 100 shell, the stator 100 shell has a driving force for the segmented punching sheets 110, and the curvature of the second curve segment 1132 is relatively large, so that the segmented punching sheets 110 are not easy to move towards the axis of the stator 100 relative to the adjacent segmented punching sheets 110, and the connection stability of the two adjacent segmented punching sheets 110 is ensured.

In the related art, when the connection structures on two adjacent segmented punching sheets 110 interfere with each other, the hinge point of the two adjacent segmented punching sheets 110 needs to move towards the direction away from the axis of the stator punching sheet, so that the interference problem is solved, the accuracy of the butt joint process is reduced, the two adjacent stator punching sheets are prone to dislocation during butt joint, and therefore the assembling process can be completed through multiple butt joints. Because the first curve section 1131 with smaller curvature is arranged in the invention, the problem of interference is not easy to occur when two adjacent segmented laminations 110 are butted, and therefore, the hinge point does not need to be moved to the direction far away from the axis of the stator laminations. The intersection point of the periphery of the yoke portion 112 and the radial edge of each two adjacent segmented stamped sheets 110 can be used as a hinge point 120, and in the assembling process, the segmented stamped sheets 110 already have a contact point with the adjacent segmented stamped sheets 110 when rotating, so that a reference point is determined, the butt joint process of the two adjacent segmented stamped sheets 110 can be smoothly completed, and the situation that the two adjacent segmented stamped sheets 110 are in butt joint for many times due to dislocation is avoided. The accuracy of two adjacent block punching sheets 110 during assembling is improved, and the assembling difficulty of the stator 100 is further reduced.

Referring to fig. 1, 2 and 3, in one possible embodiment, a first end of the first curve segment 1131 is connected to a first end of the second curve segment 1132; let the tangent line at the second end of the first curve segment 1131 be L1, the tangent line at the second end of the second curve segment 1132 be L2, and the included angle between L1 and L2 be θ, which satisfies that 90 ° < 180 ° - θ < 180 °.

In this embodiment, the supplementary angle of the angle between the tangent line L1 and the tangent line L2 can represent the curvature of both ends of the convex portion 113. If the supplementary angle of the included angle θ is less than or equal to 90 °, it is indicated that the curvatures of the end portions of the first curved section 1131 and the second curved section 1132 are both small, that is, the first curved section 1131 and the second curved section 1132 tend to be straight lines, which results in that the height of the convex part 113 protruding the yoke part 112 is small, the convex part 113 is difficult to limit the segmented sheet 110, and when the outer circumference of the segmented sheet 110 is subjected to a thrust force, the two segmented sheets 110 slide relatively in the radial direction, resulting in poor structural stability of the stator sheet. If the angle θ is 180 ° complementary to the first and second

curved segments

1131, 1132, respectively, perpendicular to the yoke portion 112, the curvature of the first and second

curved segments

1131, 1132 at the ends is relatively large, and the lobe 113 can easily interfere with the assembly process of the segment plate 110. Therefore, the supplementary angle of the included angle between the tangent line L1 and the tangent line L2 is limited between 90 ° and 180 °, so that the height of the protruding yoke portion 112 of the convex portion 113 can be effectively limited, and the two adjacent segmented punching sheets 110 are prevented from sliding relatively along the radial direction. And the convex part 113 can be ensured not to interfere with the assembly process of the partitioning and punching sheet 110 easily, so that the assembly difficulty is further improved, and the convenience of the assembly process is improved.

As shown in fig. 3, in one possible embodiment, the side length of the recess 114 is L3, the edge of the yoke 112 where the recess 114 is provided is a first edge, and the side length of the first edge is L4, which satisfies 0.1 × L4 ≦ L3 < 0.8 × L4.

In this embodiment, a relationship of a side length of the recess 114 and a side length of a first edge of the yoke 112 in which the recess 114 is provided is defined. Although the convex portion 113 and the concave portion 114 are provided between two adjacent segmented punching sheets 110, the two segmented punching sheets 110 can be assembled. However, a certain gap exists between the convex portion 113 and the concave portion 114, that is, a gap exists between two adjacent segmented laminations 110, and the magnetic resistance at the gap is large, so that the magnetic flux of the stator 100 is reduced, the magnetic performance of the stator 100 is reduced, the iron loss is increased, and further the performance of the motor is reduced. Therefore, in order to avoid the problem of the performance degradation of the motor due to the large magnetic resistance, the side length of the concave portion 114 needs to be limited, that is, the side length L3 < 0.8 × L4 of the concave portion 114. By limiting the proportional relation between the side length of the concave part 114 and the side length of the first edge of the concave part 114, the problem that the gap between two adjacent segmented punching sheets 110 is large due to the fact that the concave part 114 is too long is avoided, the phenomenon that the magnetic resistance is too large is avoided, and the motor is guaranteed to have good performance.

When two adjacent block punching sheets 110 are assembled, the convex part 113 is inserted into the concave part 114, so that the matching relation between the convex part 113 and the concave part 114 can limit the two adjacent block punching sheets 110. The sizes of the convex part 113 and the concave part 114 are matched, the edge of the yoke part 112 provided with the convex part 113 is a second edge, and the proportional relation between the side length of the convex part 113 and the side length of the second edge is the same as or similar to the proportional relation between the side length of the concave part 114 and the lengthening of the first edge. If the length of the concave portion 114 is too small, the length of the convex portion 113 is small, which results in a small width of the convex portion 113, and poor structural stability of the convex portion 113, and when the outer circumference of the segmented sheet 110 receives a thrust, the convex portion 113 is difficult to perform a stable position-limiting function. Therefore, in the invention, L3 is limited to be more than or equal to 0.1 × L4, the side length of the concave part 114 is prevented from being too small, the structural stability of the convex part 113 is ensured, and the convex part 113 can stably limit two adjacent segmented punching sheets 110.

It should be noted that, since the plurality of segmented punching sheets 110 are spliced to form the stator punching sheet and the plurality of stator punching sheets are stacked in the axial direction to form the stator 100 core, the thickness of each segmented punching sheet 110 is small, and in the present invention, for convenience of description, the thickness of the segmented punching sheet 110 is omitted, so that the side length of the concave portion 114 and the side length of the first edge refer to the side length of the radial cross section of the stator 100.

As shown in FIG. 3, in one possible embodiment, the number of stator slots in the stator 100 is Z, the number of pole pairs of the stator 100 is P, and the minimum width of the teeth 111 is W, such that L4 < W × Z/P ≦ 3 × L4.

In this embodiment, the thickness of the yoke portion 112 affects the winding space and the saturation of the magnetic field, and when the thickness of the yoke portion 112 is large, the space in the stator slot is reduced, and the winding space is small, thereby reducing the power density of the motor. When the thickness of the yoke 112 is small, a problem occurs in that the magnetic field is too saturated.

Likewise, the larger the width of tooth 111, the smaller the winding space of the stator slot.

With the size of the stator 100 unchanged, as the number of stator slots increases, the winding space per stator slot decreases.

When the number of pole pairs of the stator 100 is increased, in order to ensure that the number of pole pairs of the stator 100 matches the number of pole pairs of the rotor, the number of pole pairs of the rotor is also increased, which results in an increase in the volume of the rotor, and the space of the stator 100 is reduced in order to avoid the rotor.

Referring to fig. 1 and 3, in one possible embodiment, the yoke portion 112 is cut along the radial direction of the stator 100, and a circle C is drawn around the center of the yoke portion 112 to obtain a plurality of circles C, wherein one intersection point of any one circle C passing through the convex portion 113 and the convex portion 113 is included.

In this embodiment, the center of the yoke 112 passes through the axis of the stator 100, and a circle is made with an arbitrary radius with the center of the yoke 112 as a circular point, so that a plurality of circles can be obtained, wherein only one intersection point of any one circle passing through the convex portion 113 and the convex portion 113 is provided. In this way, the height of the convex portion 113 protruding the yoke portion 112 and the curvature of the convex portion 113 are limited within a certain range, and if the height of the convex portion 113 protruding the yoke portion 112 is large or the curvature of the convex portion 113 is large, the number of intersection points of the circle C and the convex portion 113 may be larger than 1, in which case, the problem of mutual interference between two adjacent segmented punching sheets 110 is likely to occur during the butting. According to the invention, the shape and size of the convex part 113 are further limited by the number of the intersection points of the circle C and the convex part 113, and the difficulty in butting two adjacent partitioned punching sheets 110 is reduced.

As shown in fig. 3, in one possible embodiment, yoke 112 further comprises: a first straight line segment 1121 connected to the projection 113; and the second straight line segment 1122 is connected with the concave part 114, and the first straight line segment 1121 on one piece of block punching sheet 110 is in contact with the second straight line segment 1122 on the adjacent piece of block punching sheet 110.

In this embodiment, the edge of the yoke portion 112 where the projection 113 is provided is a second edge on which a first straight line segment 1121 is provided. The edge of the yoke portion 112 where the recess 114 is disposed is a first edge, and a second straight line segment 1122 is disposed on the first edge, and when two adjacent segmented punching pieces 110 are assembled, the first straight line segment 1121 and the second straight line segment 1122 are in contact. Influenced by machining precision, a gap is easily formed between curve sections between two adjacent segmented punching sheets 110, so that a straight line section needs to be machined and formed on the yoke portion 112, the straight line sections between the two segmented punching sheets 110 are in contact, and a gap is not easily formed between the first straight line section 1121 and the second straight line section 1122, so that the two adjacent segmented punching sheets 110 can be stably in contact. Moreover, by reducing the gap between two adjacent segmented punching sheets 110, the magnetic resistance can be reduced, the magnetic flux of the stator 100 is prevented from being reduced, the magnetic performance of the stator 100 is reduced, the iron loss is not easy to increase, and the performance of the motor is prevented from being reduced.

As shown in fig. 3, in one possible embodiment, a first chamfer is provided between the first straight line segment 1121 and the protrusion 113; a second chamfer is provided between the second straight section 1122 and the recess 114.

In this embodiment, since the first straight line segment 1121 and the projection 113 are provided with the first chamfer therebetween, the transition between the first straight line segment 1121 and the projection 113 is smooth. Likewise, a second chamfer is provided between the second straight line segment 1122 and the recess 114, so there is a smooth transition between the second straight line segment 1122 and the recess 114. When two adjacent block punching sheets 110 are assembled, the block punching sheets 110 can smoothly rotate along the first chamfer and the second chamfer, the clamping is not easy to occur in the assembling process, and the convenience in the assembling process is further improved.

In one possible embodiment, the first straight line segment 1121 includes: a first sub straight line segment and a second sub straight line segment, the convex portion 113 being located between the first sub straight line segment and the second sub straight line segment; the second straight segment 1122 includes: a third sub straight line segment and a fourth sub straight line segment, and a concave portion 114 is located between the third sub straight line segment and the fourth sub straight line segment.

In this embodiment, the convex portion 113 is located between the first linear sub-segment and the second linear sub-segment, and the concave portion 114 is located between the third linear sub-segment and the fourth linear sub-segment, so that the convex portion 113 is disposed at the middle of the second edge, and the concave portion 114 is disposed at the end of the first edge, which can improve the convenience of processing the convex portion 113 and the concave portion 114. When the assembly of two adjacent lamination sheets 110 is completed, a gap is not easy to appear at the butt joint of the inner peripheries of two adjacent yoke parts 112, so that a coil is prevented from extending between the two adjacent yoke parts 112, and the convenience in the winding process is improved.

As shown in fig. 4, in an embodiment of the present invention, there is provided a motor including: a stator assembly and a rotor 300, wherein the stator assembly includes a stator 100 and a winding 200 wound on the stator 100 as in any one of the above possible embodiments; the rotor 300 is disposed inside the stator 100.

The motor thus has all the benefits of the stator 100 provided by any of the possible embodiments described above.

The stator 100 is provided with stator slots therein, the rotor 300 is disposed in the stator slots, and specifically, the stator 100 is disposed in axial communication with the rotor 300, the rotor 300 is rotatable with respect to the stator 100, the rotor 300 is provided with magnet slots for mounting the magnets 400 therein, and the magnets 400 are mounted in the magnet slots to form magnetic poles. Further, the stator 100 is also provided with windings 200, and specifically, the windings 200 are provided on the stator teeth. Stator 100 is equipped with a plurality of tooth portions 111 including the stator punching of range upon range of setting on the stator punching, and the setting of range upon range of tooth portion 111 of a plurality of stator punching has constituted a plurality of stator teeth. The stator teeth are provided inside the stator 100, facing the rotor 300. The coils are wound on the stator teeth to form a winding 200, the winding 200 is used for generating magnetic induction lines in a power-on state, and in the process that the rotor 300 rotates relative to the stator 100, namely, the rotor 300 rotates relative to the winding 200, cuts the magnetic induction lines, generates force for driving the rotor 300 to rotate, and further realizes the operation of the motor.

In an embodiment of the present invention, there is provided a compressor including: the motor of the above embodiment; or the stator in the above embodiments. The compressor in this embodiment therefore has all the benefits of the motor or stator provided by any of the possible embodiments described above.

The compressor also comprises a compression component, and the motor is connected with the compression component.

Specifically, the compression part includes cylinder and piston, in order to make the motor can link to each other with the compression part to the operation of drive compression part, still set up some connecting pieces in the compressor, specifically including bent axle, main bearing and auxiliary bearing, the motor passes through the bent axle and links to each other with the piston, in order to drive the piston and remove in the cylinder, main bearing and auxiliary bearing set up in the bent axle outside, play the spacing effect of support to the bent axle, make the bent axle normally rotate.

In an embodiment of the present invention, there is provided a refrigeration apparatus including: the compressor and the equipment main body in the above embodiments, the compressor is connected to the equipment main body.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator, comprising:

the stator comprises a plurality of segmented punching sheets, wherein the segmented punching sheets are spliced to form the stator punching sheet along the circumferential direction of the stator, and when two adjacent segmented punching sheets are spliced, one segmented punching sheet rotates along a hinged point to rotate to a position where the segmented punching sheet is butted with the adjacent segmented punching sheet;

any one of the plurality of partitioned stampings comprises:

a tooth portion;

the yoke part is arranged on one side, which is far away from the axle center of the stator, in the tooth part;

a convex portion provided at one edge of the yoke portion extending in the radial direction; and

the convex part on one segmented punching sheet is matched with the shape of the concave part on the adjacent segmented punching sheet;

the convex portion includes:

a first curve segment;

a second curved segment connected to the first curved segment, the second curved segment being farther from the axis of the stator than the first curved segment, the curvature of the first curved segment being less than the curvature of the second curved segment;

and cutting the yoke part along the radial direction of the stator, and rounding the circle center of the yoke part to obtain a plurality of circles C, wherein one intersection point of any circle C passing through the convex part and the convex part is one.

2. The stator according to claim 1,

the first end of the first curved section is connected to the first end of the second curved section;

the tangent line of the second end of the first curve segment is set to be L1, the tangent line of the second end of the second curve segment is set to be L2, the included angle between L1 and L2 is set to be theta, so as to satisfy the requirements,

90°＜180°-θ＜180°。

3. the stator according to claim 1,

the length of the side of the concave part is L3, the edge of the yoke part provided with the concave part is a first edge, the length of the side of the first edge is L4, and the requirements are met,

0.1×L4≤L3＜0.8×L4。

4. the stator according to claim 3,

the number of stator slots in the stator is Z, the number of pole pairs of the stator is P, the minimum width of the tooth part is W, and the requirement is met,

L4＜W×Z/P≤3×L4。

5. the stator of any one of claims 1 to 4, wherein the yoke further comprises:

a first straight line segment connected to the convex portion;

and the first straight line segment on one blocking punching sheet is contacted with the second straight line segment on the adjacent blocking punching sheet.

6. The stator according to claim 5,

a first chamfer is arranged between the first straight line segment and the convex part;

and a second chamfer is arranged between the second straight line section and the concave part.

7. An electric machine, characterized in that the electric machine comprises:

a stator assembly comprising a stator according to any one of claims 1 to 6 and windings wound thereon;

a rotor disposed within the stator.

8. A compressor, comprising:

the electric machine of claim 7; or

A stator as claimed in any one of claims 1 to 6.

9. A refrigeration apparatus, comprising:

the compressor of claim 8.