CN114142633B

CN114142633B - Stator, motor, compressor and refrigeration plant

Info

Publication number: CN114142633B
Application number: CN202111468901.XA
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: 2023-01-06
Anticipated expiration: 2041-12-03
Also published as: CN114142633A

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 piece towards piece in a plurality of piece towards pieces includes: a tooth portion; the yoke part is arranged on one side of the tooth part, which is far away from the axis; the abutting parts are arranged on the edges extending along the radial direction in the yoke part, and the abutting parts on two adjacent segmented punching sheets are contacted; and the matching parts are arranged on the edges of the radial extension parts in the yoke parts, the matching parts are connected to the abutting parts, and the matching parts on the two adjacent segmented punching sheets are arranged at intervals. Through setting up the clearance between two adjacent piecemeal punching sheets, the structural mode frequency of adjustment stator staggers the structural mode frequency of stator and the electromagnetic excitation frequency of converter, avoids taking place resonant phenomenon, can effectively reduce the noise of motor during operation.

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

When the structural modal frequency of the stator is close to or coincident with the electromagnetic excitation frequency of the frequency converter, the phenomenon of resonance is easily generated, and the noise of the motor is high.

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 deviated from the axis; the abutting parts are arranged on the edges extending along the radial direction in the yoke part, and the abutting parts on two adjacent segmented punching sheets are contacted; and the matching parts are arranged on the edge extending in the radial direction in the yoke part, the matching parts are connected to the abutting parts, and the matching parts on the two adjacent segmented punching sheets are arranged at intervals.

According to the stator provided by the invention, in order to reduce the processing difficulty of the stator and improve the slot filling rate of the motor, the stator is of a split structure. 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 into the stator with a plurality of pieces towards piece part again, compare in processing a complete stator, process the degree of difficulty of piece towards the piece part and reduce, 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 structural modal frequency of stator is correlated with the thickness of yoke portion, sets up the clearance on yoke portion, can adjust the structural modal frequency of stator to stagger the electromagnetic excitation frequency of the structural modal frequency of stator and converter.

Specifically, although the structural modal frequency of the stator is related to the thickness of the yoke, if the thickness of the yoke is simply increased, the space in the stator slot is reduced, the winding space is smaller, and the power density of the motor is reduced. If the thickness of the yoke is simply small, the problem of the magnetic field being too saturated arises. Therefore, in the invention, the matching parts are arranged on the two segmented punching sheets, when the plurality of segmented punching sheets are sequentially adjacent to form the stator punching sheet, the matching parts on the two adjacent segmented punching sheets are opposite, and the two matching parts are arranged at intervals, namely, a certain gap is formed between the two adjacent segmented punching sheets. The gap can vary the thickness at a portion of the structure in the yoke. Therefore, through setting up the clearance between two adjacent piecemeal punching sheets, need not increase the thickness of yoke portion, also need not reduce the thickness of yoke portion, need not reduce stator inslot space and avoid the magnetic field too saturated basis on, just can adjust the structural mode frequency of stator, stagger the structural mode frequency of stator and the electromagnetic excitation frequency of converter, avoid taking place resonance's phenomenon, can effectively reduce the noise of motor during operation.

When a plurality of piecemeal towards piece adjacent formation stator towards piece in proper order, the portion of supporting on two adjacent piecemeal towards pieces is relative, and two support promptly support to contact mutually to guarantee the structural stability of stator towards piece.

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 a possible design, the width in clearance between two adjacent cooperation portions is M, and the first end of cooperation portion is L1 with the interval of the second end of cooperation portion, and the external diameter of stator is D1, and the internal diameter of stator is D2, and along the radial of piecemeal towards the piece, the minimum length of yoke portion is L2, satisfies: m is more than 0 and less than L1 and more than 0.8 multiplied by L2 and is not more than D1-D2/4.5.

In this design, L1 > M is defined, that is, the length of the fitting portion is larger than the width of the fitting portion, and if the width of the gap is too large, it is equivalent to reducing the thickness of the yoke portion, and a problem of excessive saturation of the magnetic field is likely to occur. Therefore, in order to adjust the structural modal frequency of the stator, the length of the gap between two adjacent segmented punching sheets can be adjusted by adjusting the length of the matching part, and further the structural modal frequency of the stator is adjusted, so that the structural modal frequency of the stator is staggered with the electromagnetic excitation frequency of the frequency converter.

The length of yoke portion everywhere probably is inequality, yoke portion minimum length probably is located radial edge, consequently do the comparison with the length of cooperation portion and the minimum length of yoke portion, the length of cooperation portion is L1, the minimum length of yoke portion is L2, L1 < 0.8X L2, through the relation of the length of injecing the cooperation portion and the minimum length of yoke portion, avoid the clearance overlength between the adjacent lamination piece, the assurance is supported and is had certain length by the portion, guarantee that two adjacent lamination pieces are located the structural stability of junction. The problem that two adjacent partitioned punching sheets are damaged due to external force caused by the fact that the length of the abutting portion is too small is avoided.

The outer diameter of the stator is D1, the inner diameter of the stator is D2, and the difference value between the outer diameter of the stator and the inner diameter of the stator is the length of the segmented punching sheet along the radial direction of the stator. The minimum length L2 of the yoke part and the length of the blocking punching sheet meet the following conditions: D1-D2/4.5 is more than or equal to 0.8 xL 2, and the minimum length of the yoke part is related to the length of the segmented punching sheet through the formula, so that the yoke part is prevented from being large in length, the space in the stator teeth is ensured, and the power density of the motor is prevented from being reduced. The problem that the magnetic field is too saturated can be prevented by avoiding the small length of the yoke part.

In the present invention, for convenience of description, the thicknesses of the segmented sheets are omitted, and therefore, the minimum length of the yoke portion refers to the length along the radial cross section of the stator.

In one possible design, L1 and L2 satisfy: l1 is more than 0.1 × L2 and less than 0.8 × L2.

In this design, lengths of the yoke portions may be different from place to place, and a minimum length of the yoke portion may be located at a radial edge, so that the length of the fitting portion is compared with the minimum length of the yoke portion, the length of the fitting portion is L1, the minimum length of the yoke portion is L2, and L1 and L2 satisfy the following conditions: l1 is more than 0.1 × L2 and less than 0.8 × L2. Through the length of injecing cooperation portion and the relation of yoke portion minimum length, avoid the clearance overlength between the adjacent piecemeal towards the piece, guarantee to lean on the portion to have certain length, guarantee that two adjacent piecemeal towards the structural stability that the piece is located the junction. The problem that two adjacent partitioned punching sheets are damaged due to external force caused by the fact that the length of the abutting portion is too small is avoided. Moreover, as L1 is more than 0.1 multiplied by L2, the adjusting effect of the structural modal frequency of the stator can be ensured, the structural modal of the stator is effectively staggered with the electromagnetic excitation frequency of the frequency converter, and the noise of the motor during working is reduced.

In one possible design, the width M of the gap satisfies: m is less than or equal to 0.5mm.

In this design, the maximum width of the gap is defined, and when the width of the gap is larger than 0.5mm, the width of the gap becomes too large, which corresponds to a reduction in the thickness of the yoke, and a problem of excessive saturation of the magnetic field is likely to occur. Therefore, in order to adjust the structural modal frequency of the stator, the length of the gap between two adjacent segmented punching sheets can be adjusted by adjusting the length of the matching part, and further the structural modal frequency of the stator is adjusted, so that the structural modal frequency of the stator is staggered with the electromagnetic excitation frequency of the frequency converter.

In one possible design, the first end of the fitting portion is provided on the outer periphery of the yoke portion or the first end of the fitting portion is provided on the inner periphery of the yoke portion in the radial direction of the segmented sheet.

In this design, the first end of the engagement portion may be disposed at an outer periphery of the yoke portion, the engagement portion penetrating the outer periphery of the yoke portion. The first end of the fitting portion may also be disposed at an inner periphery of the yoke portion, i.e., the fitting portion penetrates the inner periphery of the yoke portion. The end of the matching part is arranged on the inner periphery or the outer periphery of the yoke, and compared with the matching part arranged in the middle of the edge of the yoke, the processing difficulty of the matching part can be effectively reduced, so that the processing convenience of the partitioning punching sheet can be improved.

In one possible design, the number of the partitioning stamped sheets is N, and the following conditions are met: n is more than or equal to 6 and less than or equal to 12.

In the design, when the number of the partitioned punching sheets is less than 6, the number of the partitioned punching sheets is less, so the number of gaps is less, the effect of adjusting the structural modal frequency of the stator by a small number of gaps is not obvious, and the vibration noise of the motor during working is also larger. When the number of the blocking punching sheets is larger than 12, the number of the blocking punching sheets is large, the installation of two adjacent blocking punching sheets is an installation procedure, and when the number of the blocking punching sheets is large, the installation procedure of the stator punching sheets is complex, so that the assembly difficulty of the stator is large. According to the invention, the number of the segmented punching sheets is limited between 6 and 12, so that the structural modal frequency adjustment effect of the stator can be ensured, the noise of the motor during working is reduced, the assembly difficulty of the stator can be reduced, and the processing convenience of the stator is improved.

In one possible design, the segmented sheet further comprises: a first connecting portion provided at one edge of the yoke portion extending radially; the second connecting portion is arranged at the other edge of the yoke portion, which extends in the radial direction, and the first connecting portion on one piece punching sheet is matched with the second connecting portion on the adjacent piece punching sheet so as to limit the radial relative movement of the two adjacent piece punching sheets.

In this design, a first connection portion and a second connection portion are provided on the segment punch. Specifically, first connecting portion set up in the edge along stator towards piece radial extension, and the second connecting portion set up in another edge along stator towards piece radial extension, also promptly, first connecting portion and second connecting portion locate the both sides that the piece was punched towards the piece respectively along the circumference of stator towards piece. The first connecting portion of one piece towards the piece and the second connecting portion of another adjacent piece towards the piece cooperate to realize the connection of two piece towards the piece. The plurality of the partitioned punching sheets are arranged along the circumferential direction of the stator, so that any two adjacent partitioned punching sheets are matched through the first connecting part and the second connecting part, connection among the plurality of the partitioned punching sheets is realized, and the stator is formed in a surrounding mode.

Set up first connecting portion and second connecting portion and can improve the connection stability of adjacent piecemeal towards the piece on the piecemeal towards the piece, avoid two adjacent piecemeal towards the piece to take place to rock.

In one possible embodiment, the first connection is designed as a projection and the second connection is designed as a recess adapted to the projection.

In this design, the first connecting portion is configured as a protruding member, and the second connecting portion is configured as a concave portion, that is, a concave-convex fit structure is formed between the first connecting portion and the second connecting portion, and the concave portion is adapted to the protruding member, so that the first connecting portion and the second connecting portion are connected and matched.

Through setting up first connecting portion as protrusion, set up second connecting portion as with protrusion matched with concave part, made between first connecting portion and the second connecting portion form unsmooth complex structure, promoted the connection reliability, reduced the processing degree of difficulty.

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 one of the possible designs 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 one of the schematic structural diagrams of a partitioning sheet in the embodiment of the present invention;

FIG. 2 is a second schematic structural diagram of a partitioning sheet according to an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a stator lamination in an embodiment of the invention;

fig. 4 shows a third schematic structural diagram of a partitioning punch sheet in the embodiment of the present invention;

FIG. 5 is a fourth schematic diagram illustrating a structure of a partitioning sheet according to an embodiment of the present invention;

fig. 6 shows a schematic structural view of a compressor in an embodiment of the present invention;

fig. 7 shows a schematic diagram of motor efficiency and motor noise as a function of length of the mating portion in an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 6 is:

100 stators, 110 segmented punching sheets, 111 tooth parts, 112 yoke parts, 113 abutting parts, 114 matching parts, 115 first connecting parts, 116 second connecting parts, 200 rotors, 300 compressors, 310 compression parts, 311 cylinders, 312 pistons, 320 crankshafts, 330 main bearings, 340 auxiliary bearings and 350 liquid reservoirs.

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, taken in conjunction with the accompanying drawings and detailed description, is set forth below. 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 refrigerating apparatus provided according to some embodiments of the present invention will be described below with reference to fig. 1 to 7.

Referring to fig. 1, 2 and 3, in some embodiments of the present invention, a stator is provided, including: the plurality of segmented 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: the structure comprises a tooth part 111, a yoke part 112, an abutting part 113 and a matching part 114, wherein the yoke part 112 is arranged on one side, which is far away from the axis, of the tooth part 111; the abutting parts 113 are arranged on the edge of the yoke part 112 extending along the radial direction, and the abutting parts 113 on two adjacent segmented punching sheets 110 are in contact; the edge that radial extension in yoke portion 112 is located to cooperation portion 114, and cooperation portion 114 is connected in support portion 113, and cooperation portion 114 interval on two adjacent piecemeal towards piece 110 sets up.

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.

And, design stator 100 for split type mosaic structure, be convenient for realize the winding of coil and establish, can establish the back at the coil winding and install two adjacent piecemeal punching sheets 110 again, reduce the degree of difficulty of establishing the coil, consequently can be under the same circumstances of stator 100 size, establish more coils around, 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 structural modal frequency of the stator 100 is related to the thickness of the yoke 112, and the structural modal frequency of the stator 100 can be adjusted by providing a gap in the yoke 112 so as to be offset from the electromagnetic excitation frequency of the inverter by adjusting the structural modal frequency of the stator 100.

Specifically, although the structural modal frequency of the stator 100 is related to the thickness of the yoke portion 112, if the thickness of the yoke portion 112 is simply increased, the space in the slots of the stator 100 is reduced, the winding space is smaller, and the power density of the motor is reduced. If the thickness of the yoke portion 112 is simply made small, a problem arises in that the magnetic field is too saturated. Therefore, in the invention, the matching parts 114 are arranged on the two segmented punching sheets 110, when the plurality of segmented punching sheets 110 are sequentially adjacent to form the stator punching sheet, the matching parts 114 on the two adjacent segmented punching sheets 110 are opposite, and the two matching parts 114 are arranged at intervals, namely, a certain gap exists between the two adjacent segmented punching sheets 110. The gap can vary the thickness at a portion of the structure in the yoke 112. Therefore, by arranging the gap between two adjacent segmented sheets 110, the thickness of the yoke portion 112 does not need to be increased, the thickness of the yoke portion 112 does not need to be reduced, the structural modal frequency of the stator 100 can be adjusted on the basis that the space in the slot of the stator 100 does not need to be reduced and the magnetic field is prevented from being too saturated, the structural modal frequency of the stator 100 and the electromagnetic excitation frequency of a frequency converter are staggered, the resonance phenomenon is avoided, and the noise generated when the motor works can be effectively reduced.

When a plurality of piecemeal punching sheets 110 are adjacent in proper order and form the stator punching sheet, the portion 113 of supporting on two adjacent piecemeal punching sheets 110 is relative, two support portions 113 contact promptly to guarantee the structural stability of stator punching sheet.

In a possible embodiment, as shown in fig. 1 and fig. 2, a width of a gap between two adjacent matching portions 114 is M, a distance between a first end of the matching portion 114 and a second end of the matching portion 114 is L1, an outer diameter of the stator 100 is D1, an inner diameter of the stator 100 is D2, and a minimum length of the yoke portion 112 along a radial direction of the segment punching sheet 110 is L2, which satisfies: m is more than 0 and less than L1 and more than 0.8 multiplied by L2 and is not more than D1-D2/4.5.

In this embodiment, L1 > M is defined, that is, the length of the fitting portion 114 is larger than the width of the fitting portion 114, and if the width of the gap is too large, which is equivalent to reducing the thickness of the yoke portion 112, the problem of the magnetic field being too saturated easily occurs. Therefore, in order to adjust the structural modal frequency of the stator 100, the length of the gap between two adjacent segmented laminations 110 can be adjusted by adjusting the length of the engaging portion 114, and the structural modal frequency of the stator 100 is adjusted so as to shift the structural modal frequency of the stator 100 from the electromagnetic excitation frequency of the inverter.

The lengths of the yoke portions 112 may be different from each other, the minimum length of the yoke portions 112 may be located at the radial edge, therefore, the length of the fitting portion 114 is compared with the minimum length of the yoke portions 112, the length of the fitting portion 114 is L1, the minimum length of the yoke portions 112 is L2, L1 is less than 0.8 × L2, by defining the relationship between the length of the fitting portion 114 and the minimum length of the yoke portions 112, the gap between adjacent segmented punching sheets 110 is prevented from being too long, it is ensured that the abutting portion 113 has a certain length, and the structural stability of the adjacent two segmented punching sheets 110 at the joint is ensured. The problem that two adjacent segmented punching sheets 110 are damaged by external force due to the fact that the length of the abutting portion 113 is too small is avoided.

The outer diameter of the stator 100 is D1, the inner diameter of the stator 100 is D2, and the difference between the outer diameter of the stator 100 and the inner diameter of the stator 100 is the length of the segmented laminations 110 along the radial direction of the stator 100. The minimum length L2 of the yoke portion 112 and the length of the segmented punching sheet 110 satisfy the following conditions: D1-D2/4.5 is more than or equal to 0.8 xL 2, and the minimum length of the yoke part 112 is related to the length of the segmented punching sheet 110 through the formula, so that the length of the yoke part 112 is prevented from being large, the space in the teeth of the stator 100 is ensured, and the power density of the motor is prevented from being reduced. The yoke 112 can be prevented from being short in length, and the problem of excessive saturation of the magnetic field can be prevented.

It should be noted that, since the plurality of segmented sheets 110 are joined together to form a stator sheet and the plurality of stator sheets are stacked in the axial direction to form the stator 100 core, the thickness of each segmented sheet 110 is small, and in the present invention, the thickness of the segmented sheet 110 is omitted for convenience of description, so that the minimum length of the yoke portion 112 is the length along the radial cross section of the stator 100.

In one possible embodiment, L1 and L2 satisfy: l1 is more than 0.1 × L2 and less than 0.8 × L2.

In this embodiment, lengths of the yoke portions 112 may be different from each other, and a minimum length of the yoke portions 112 may be located at a radial edge, so that comparing the length of the fitting portion 114 with the minimum length of the yoke portions 112, the length of the fitting portion 114 is L1, the minimum length of the yoke portions 112 is L2, and L1 and L2 satisfy the following conditions: l1 is more than 0.1 × L2 and less than 0.8 × L2. Through the relation of the length of the limited matching part 114 and the minimum length of the yoke part 112, the gap between the adjacent segmented punching sheets 110 is prevented from being too long, the abutting part 113 is ensured to have a certain length, and the structural stability of the connecting position of the two adjacent segmented punching sheets 110 is ensured. The problem that the two adjacent segmented punching sheets 110 are damaged by external force due to the fact that the length of the abutting portion 113 is too small is avoided. Moreover, as L1 is more than 0.1 multiplied by L2, the adjusting effect of the structural modal frequency of the stator 100 can be ensured, the structural modal of the stator 100 is effectively staggered with the electromagnetic excitation frequency of the frequency converter, and the noise of the motor during working is reduced.

In addition, the length of the engagement portion also affects the efficiency of the motor, and limiting the length of the engagement portion 114 within the above range ensures that the motor efficiency is maintained within a reasonable range.

As shown in fig. 7, when the length of the fitting portion 114 is between 0.1 × L2 and 0.8 × L2, the effect of controlling noise is good. When the length of the fitting part 114 is less than 0.8 × L2, the efficiency of the motor is slowly decreased, and when the length of the fitting part 114 is greater than 0.8 × L2, the efficiency of the motor is rapidly decreased.

In a possible embodiment, the width M of the gap satisfies: m is less than or equal to 0.5mm.

In this embodiment, the maximum width of the gap is defined, and when the width of the gap is greater than 0.5mm, the width of the gap is too large, which corresponds to a reduction in the thickness of the yoke portion 112, and a problem of excessive saturation of the magnetic field is likely to occur. Therefore, in order to adjust the structural modal frequency of the stator 100, the length of the gap between two adjacent segmented laminations 110 can be adjusted by adjusting the length of the engaging portion 114, and the structural modal frequency of the stator 100 is adjusted so as to shift the structural modal frequency of the stator 100 from the electromagnetic excitation frequency of the inverter.

As shown in fig. 2 and 4, in one possible embodiment, the first end of the fitting portion 114 is disposed on the outer periphery of the yoke portion 112 or the first end of the fitting portion 114 is disposed on the inner periphery of the yoke portion 112 along the radial direction of the segmented sheet 110.

In this embodiment, the first end of the fitting portion 114 may be disposed at the outer circumference of the yoke portion 112, and the fitting portion 114 penetrates the outer circumference of the yoke portion 112. The first end of the fitting portion 114 may also be disposed at the inner periphery of the yoke portion 112, i.e., the fitting portion 114 penetrates the inner periphery of the yoke portion 112. The end of the fitting portion 114 is disposed on the inner periphery or the outer periphery of the yoke portion 112, and compared with the case where the fitting portion 114 is disposed in the middle of the edge of the yoke portion 112, the difficulty in processing the fitting portion 114 can be effectively reduced, and the convenience in processing the segmented punching sheet 110 can be improved.

In a possible embodiment, the number of the segmented sheets 110 is N, which satisfies: n is more than or equal to 6 and less than or equal to 12.

In this embodiment, when the number of the segmented laminations 110 is less than 6, the number of the segmented laminations 110 is small, so the number of the gaps is small, the effect of the small number of the gaps on adjusting the structural modal frequency of the stator 100 is not obvious, and the vibration noise of the motor during operation is also large. When the number of the segmented punching sheets 110 is greater than 12, the number of the segmented punching sheets 110 is large, the installation of two adjacent segmented punching sheets 110 is a one-time installation process, and when the number of the segmented punching sheets 110 is large, the installation process of the stator punching sheets is complex, so that the assembly difficulty of the stator 100 is large. In the invention, the number of the segmented punching sheets 110 is limited between 6 and 12, so that the structural modal frequency adjusting effect of the stator 100 can be ensured, the noise of the motor during working can be reduced, the assembling difficulty of the stator 100 can be reduced, and the processing convenience of the stator 100 can be improved.

As shown in fig. 1, fig. 2, and fig. 5, in a possible embodiment, the segmented lamination 110 further includes: a first connecting portion 115 and a second connecting portion 116, the first connecting portion 115 being provided at one edge of the yoke portion 112 extending in the radial direction; the second connecting portion 116 is disposed at the other edge of the yoke portion 112 extending in the radial direction, and the first connecting portion 115 on one segmented sheet 110 is matched with the second connecting portion 116 on the adjacent segmented sheet 110 to limit the relative movement of the adjacent segmented sheets 110 in the radial direction.

In this embodiment, the first connection portion and the second connection portion are provided on the segment punching sheet 110. Specifically, first connecting portion set up in the edge along stator towards piece radial extension, and the second connecting portion set up in another edge along stator towards piece radial extension, also promptly, first connecting portion and second connecting portion locate the both sides that the piecemeal was punched piece 110 respectively along the circumference of stator towards piece. The first connecting portion of one piece of block punching sheet 110 is matched with the second connecting portion of another piece of block punching sheet 110, so that the connection of the two piece of block punching sheets 110 is realized. The plurality of segmented punching sheets 110 are arranged along the circumferential direction of the stator 100, so that any two adjacent segmented punching sheets 110 are matched through the first connecting part and the second connecting part, connection among the plurality of segmented punching sheets 110 is realized, and the stator 100 is formed in a surrounding manner.

Set up first connecting portion and second connecting portion and can improve the connection stability of adjacent piecemeal towards piece 110 on piecemeal towards piece 110, avoid two adjacent piecemeal towards piece 110 to take place to rock.

As shown in fig. 1 and 2, in one possible application, the first connection portion 115 and the second connection portion 116 may be disposed on the mating portion 114. As shown in fig. 5, the first connection portion 115 and the second connection portion 116 may also be provided on the abutting portion 113.

In a possible embodiment, the first connection 115 is configured as a projection and the second connection 116 is configured as a recess adapted to the projection.

In this embodiment, the first connecting portion 115 is configured as a protrusion, and the second connecting portion 116 is configured as a recess, that is, a concave-convex fit structure is formed between the first connecting portion 115 and the second connecting portion 116, and the recess is matched with the protrusion to realize the connection fit of the first connecting portion 115 and the second connecting portion 116.

Through setting up first connecting portion 115 as protruding piece, set up second connecting portion 116 as with protruding piece matched with concave part, made between first connecting portion 115 and the second connecting portion 116 form unsmooth complex structure, promoted the connection reliability, reduced the processing degree of difficulty.

In an embodiment of the present invention, there is provided a motor including: the stator assembly comprises a stator and a rotor, wherein the stator assembly comprises the stator and a winding wound on the stator in any one of the possible embodiments; the rotor is disposed within the stator.

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

The stator is internally provided with a stator slot, the rotor is arranged in the stator slot, specifically, the stator and the rotor are coaxially arranged, the rotor can rotate relative to the stator, the rotor is provided with a magnet slot, a magnet is assembled in the magnet slot, and the magnet is installed in the magnet slot to form a magnetic pole. Further, the stator is also provided with windings, and particularly, the windings are arranged on the stator teeth. The stator is equipped with a plurality of tooth portions including the stator towards the piece of range upon range of setting, the stator towards the piece, and a plurality of stator teeth have been constituted to the range upon range of setting of the tooth portion of a plurality of stator towards the piece. The stator teeth are arranged on the inner side of the stator and arranged towards the rotor. The coils are wound on the stator teeth to form windings, the windings are used for generating magnetic induction lines in a power-on state, and when the rotor rotates relative to the stator, namely, the rotor rotates relative to the windings, the rotor rotating relative to the windings cuts the magnetic induction lines to generate force for driving the rotor to rotate, so that the motor can run.

In the stator of motor, the cooperation portion on two adjacent piecemeal punching sheets is relative, and two cooperation portions interval sets up, exists certain clearance between two adjacent piecemeal punching sheets promptly. The gap can vary the thickness at a portion of the structure in the yoke. Therefore, through setting up the clearance between two adjacent piecemeal punching sheets, need not increase the thickness of yoke portion, also need not reduce the thickness of yoke portion, need not reduce stator inslot space and avoid the magnetic field too on the saturated basis, just can adjust the structural mode frequency of stator, stagger the structural mode frequency of stator and the electromagnetic excitation frequency of converter, avoid taking place resonance's phenomenon, can effectively reduce the noise of motor during operation.

As shown in fig. 6, in an embodiment of the present invention, there is provided a compressor 300 including: the motor of the above embodiment; or the stator 100 in the above embodiments. The compressor 300 in this embodiment thus has all the benefits of the motor or stator 100 provided by any of the possible embodiments described above.

The motor includes a stator 100 and a rotor 200, and the rotor 200 is located inside the stator 100.

The compressor 300 further includes a compression part 310, and a motor is connected to the compression part 310.

Specifically, the compression part 310 includes a cylinder 311 and a piston 312, in order to enable the motor to be connected to the compression part 310 and drive the compression part 310 to operate, some connecting members are further provided in the compressor 300, specifically including a crankshaft 320, a main bearing 330 and a secondary bearing 340, the motor is connected to the piston 312 through the crankshaft 320 to drive the piston 312 to move in the cylinder 311, and the main bearing 330 and the secondary bearing 340 are provided outside the crankshaft 320 to support and limit the crankshaft 320 so that the crankshaft 320 can rotate normally.

The compressor 300 further includes an accumulator 350, the accumulator 350 being connected to the housing of the compressor 300.

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 plurality of segmented punching sheets are spliced along the circumferential direction of the stator to form the stator 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, in the tooth part;

the abutting parts are arranged on the edges extending along the radial direction in the yoke part, and the abutting parts on two adjacent segmented punching sheets are contacted; and

the matching parts are arranged on the edges of the yoke parts extending in the radial direction, the matching parts are connected to the abutting parts, and the matching parts on two adjacent segmented punching sheets are arranged at intervals;

adjacent two the width in clearance between the cooperation portion is M, the first end of cooperation portion with the interval of the second end of cooperation portion is L1, the external diameter of stator is D1, the internal diameter of stator is D2, follows the piece is punched radially, the minimum length of yoke portion is L2, satisfies:

0＜M＜L1＜0.8×L2≤D1-D2/4.5。

2. the stator according to claim 1,

l1 and L2 satisfy: l1 is more than 0.1 × L2 and less than 0.8 × L2.

3. The stator according to claim 1,

the width M of the gap satisfies: m is less than or equal to 0.5mm.

4. The stator according to any one of claims 1 to 3,

along the radial of piecemeal towards piece, the first end of cooperation portion is located the periphery of yoke portion or the first end of cooperation portion is located the inner periphery of yoke portion.

5. The stator according to any one of claims 1 to 3,

the number of the blocking punching sheets is N, and the requirements are met: n is more than or equal to 6 and less than or equal to 12.

6. The stator according to any one of claims 1 to 3, wherein the segmented lamination further comprises:

a first connecting portion provided at one edge of the yoke portion extending in a radial direction;

and the second connecting part is arranged at the other edge of the yoke part, which extends in the radial direction, and the first connecting part on one piece punching sheet is matched with the second connecting part on the adjacent piece punching sheet so as to limit the relative motion of the adjacent piece punching sheets in the radial direction.

7. The stator according to claim 6,

the first connection portion is configured as a protrusion and the second connection portion is configured as a recess adapted to the protrusion.

8. An electric machine, comprising:

a stator assembly comprising a stator according to any one of claims 1 to 7 and windings wound on the stator;

a rotor disposed within the stator.

9. A compressor, comprising:

the electric machine of claim 8; or

A stator as claimed in any one of claims 1 to 7.

10. A refrigeration apparatus, comprising:

the compressor of claim 9.