CN114157054A

CN114157054A - Stator, motor, compressor and refrigeration plant

Info

Publication number: CN114157054A
Application number: CN202111468259.5A
Authority: CN
Inventors: 毛临书; 邱小华; 杨文权; 张肃
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: 2022-03-08
Also published as: WO2023097919A1

Abstract

The invention provides a stator, a motor, a compressor and refrigeration equipment. The stator includes: the stator core comprises a plurality of stator teeth arranged at intervals, and a stator slot is formed between every two adjacent stator teeth; the stator winding is wound on the stator teeth, and at least one part of the stator winding is positioned in the stator slot; and the insulating layer is arranged in the stator slot and positioned between the stator winding and the stator teeth, the insulating layer divides the stator slot into two areas, and the stator winding wound on different stator teeth is positioned in the two areas of the insulating layer. Wherein, the insulating layer includes: a first insulating layer for spacing the stator winding from the stator teeth; and the second insulating layer is used for winding the stator windings arranged on different stator teeth at intervals, and two ends of the second insulating layer are respectively connected with the first insulating layer so as to divide the space enclosed by the first insulating layer into two areas. The stator provided by the invention improves the full slot rate of the stator and improves the stator installation efficiency.

Description

Stator, motor, compressor and refrigeration plant

Technical Field

The invention relates to the technical field of motor manufacturing, in particular to a stator, a motor, a compressor and refrigeration equipment.

Background

As one of the most important achievements of modern industry, the motor is widely applied to countless devices in various industries and has irreplaceable functions. When the motor operates, in order to make the motor normally operate not by self electromagnetic interference, often need add the insulating part in the motor stator in order to play the insulating effect in groove, still need add alternate insulating part in order to play the insulating effect in phase simultaneously, consequently, be used for insulating part quantity many and the structure is complicated, occupies the groove space of motor, has reduced the full groove rate of motor, and then influences the effect of motor.

Disclosure of Invention

The present invention is directed to solving one of the technical problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a stator.

A second aspect of the invention proposes an electric machine.

A third aspect of the present invention provides a compressor.

A fourth aspect of the present invention provides a refrigeration apparatus.

A first aspect of the present invention provides a stator comprising: stator core, stator winding and insulating layer. The stator core comprises a plurality of stator teeth arranged at intervals, and a stator slot is formed between every two adjacent stator teeth; the stator winding is wound on the stator teeth, and at least one part of the stator winding is positioned in the stator slot; the insulating layer is arranged in the stator slot and positioned between the stator winding and the stator teeth, the insulating layer divides the stator slot into two areas, and the stator winding wound on different stator teeth is positioned in the two areas of the insulating layer.

Specifically, the stator winding is arranged on a stator core, the stator core is generally in a tubular structure, a plurality of stator teeth and stator slots are arranged on the stator core, the stator teeth protrude towards the hollow part inside the stator core, the stator slots are arranged between every two stator teeth at intervals, and each stator slot is formed by clamping the stator teeth on two sides of the stator slot.

Further, the stator winding refers to a winding wound on the stator, and is a coil formed by winding a fixing component on a conductive wire made of a material with good conductivity, such as a copper wire, specifically, the stator winding is wound on the stator teeth and penetrates through the stator slots on two sides of the stator teeth, and then is arranged on the stator core. Because the material, size, position and the number of turns of stator winding wire on the stator tooth all can produce direct influence to the performance of stator, consequently, when the manufacturing of stator and assembly, need wind on the stator tooth as far as and establish more windings, improve the full rate of slots of motor and then improve motor performance.

Further, an insulating layer is arranged inside the stator slot. The motor works on the principle that the working magnetic field exerts force on current stress and then converts electric energy into mechanical energy, so that the motor can pass larger current and form a magnetic field with larger intensity when working. In order to ensure that the motor works normally, insulation treatment is often needed among all components in the motor, and the insulation treatment method is to arrange an insulation layer in a stator slot. The insulating layer isolates the stator winding from the stator teeth, so that the stator winding and the stator teeth are insulated, namely, the effect of slot insulation is achieved; meanwhile, the same stator slot is divided into two areas by the insulating layer, and two stator windings wound on different stator teeth are isolated by the insulating layer when penetrating through the same stator slot, so that the two adjacent stator windings are insulated, namely, the phase insulation, namely the insulating layer can simultaneously meet the requirements of the slot insulation between the stator winding and the stator core and the phase insulation of the stator windings wound on different stator teeth.

Specifically, the stator is composed of a stator core, a stator winding and an insulating layer. The stator core is of a generally tubular structure, stator teeth and stator slots are arranged on the stator core, the stator teeth are arranged on the inner wall of the stator core at intervals and protrude towards the inside in a hollow mode, and the stator slots are arranged between every two adjacent stator teeth; the stator winding is a conductive coil wound on the stator, the stator winding is wound on the stator teeth and penetrates through the stator slots on two sides of the stator teeth, and under the condition that normal work is not influenced, in order to enable the performance of the stator to be optimal, the number of turns of the coil of the stator winding needs to be as large as possible, and the stator winding also needs to occupy the space in the stator slots as large as possible; the insulating layer sets up in stator core's stator slot, laminating stator slot inner wall and enclose a space, when winding and establishing stator winding, stator winding runs through the space that the insulating layer of stator tooth both sides enclosed and establishes on this stator tooth, the insulating layer of this stator tooth both sides is used for realizing slot insulation at stator winding and the stator tooth that this stator winding winds the stator tooth that establishes, and be divided into two regions in same insulating layer, two stator windings around establishing two adjacent stator teeth run through one in above-mentioned two regions respectively, above-mentioned two stator windings are kept apart by the insulating layer and realize phase insulation, make the stator avoid being disturbed by the electromagnetic field of self production when normal operating as far as.

According to the invention, the stator can have the following additional technical characteristics:

in the above technical solution, further, the insulating layer includes a first insulating layer and a second insulating layer. The first insulating layer is used for spacing the stator winding and the stator teeth; the second insulating layer is used for winding stator windings arranged on different stator teeth at intervals, and two ends of the second insulating layer are respectively connected to the first insulating layer so as to divide the space enclosed by the first insulating layer into two areas.

In this embodiment, the insulating layer includes a first insulating layer and a second insulating layer. Specifically, a first insulating layer is disposed around the stator slots, the first insulating layer being attached to the sidewalls of the stator teeth. When the stator winding is wound, the stator winding penetrates through the space isolated in the stator slot by the first insulating layer and is wound by the stator teeth. After the stator winding is wound, a first insulation layer is arranged between the part of the stator winding, which is positioned in the stator slot, and the stator teeth, and the first insulation layer is arranged between the stator winding and the stator teeth and separates the stator winding from the side walls of the stator teeth, so that the effect of slot insulation is achieved.

Furthermore, the second insulating layer is located inside a space enclosed by the first insulating layer, two ends of the second insulating layer are connected with the first insulating layer, the space enclosed by the first insulating layer is divided into two areas, and edges of the two areas respectively abut against two adjacent different stator teeth. When the stator windings are wound, two adjacent stator windings need to penetrate through a space surrounded by the same first insulating layer, at the moment, the two stator windings respectively penetrate through two different areas in the same first insulating layer, and the second insulating layer is located between the two adjacent stator windings wound on different stator teeth, so that phase insulation between the stator windings is realized.

In the above technical solution, further, the first insulating layer includes a yoke insulating layer, a tooth insulating layer, and a tooth shoe insulating layer connected, and the bend line. The yoke insulating layer, the tooth insulating layer and the tooth shoe insulating layer are connected, and the tooth shoe insulating layer is provided with a gap so that the first insulating layer can be opened or closed; above-mentioned buckling line extends along the axial of stator, and yoke portion insulating layer is located to the buckling line, and yoke portion insulating layer can be followed the buckling line and buckled.

In this embodiment, the first insulating layer includes a yoke insulating layer, a tooth insulating layer, and a tooth shoe insulating layer connected to each other. The first insulating layer is positioned in the stator slot and encloses a long tube which is attached to the stator slot, and the side surfaces of the long tube are respectively provided with a yoke insulating layer, a tooth part insulating layer and a tooth shoe part insulating layer. The yoke insulating layer is a part of the inner diameter of the stator yoke, wherein the first insulating layer is attached to the bottom of a stator slot; the tooth part insulating layer is a part of the first insulating layer which is attached to the side walls of the two sides of the stator tooth; the tooth boot part insulating layer is a part of a first insulating layer which is attached to two adjacent stator tooth boots, a gap is formed in the tooth boot part insulating layer, when the tooth boot part insulating layers on two sides of the gap are connected, the gap is closed, and the first insulating layer is in a closed state; when the tooth boot insulating layers on the two sides of the notch are separated, the notch is opened, and the first insulating layer is in an open state. The position of the notch is not particularly required, however, in practical work, for convenience of operation, the notch is often arranged at the notch position of the tooth boot insulating layer and the stator slot.

Further, in this embodiment, the first insulating layer further includes the bending line. The bending line is arranged on the first insulating layer in an axially extending manner along the stator slot, so that when the position of the first insulating layer provided with the bending line is bent along the bending line, the gap is opened or closed along with the bending line, and the purpose of enabling the first insulating layer to be in an opened state or enabling the first insulating layer to be in a closed state is achieved.

Further, the position of the bending line can be selected in many ways, and more than one bending line can be disposed on the same first insulating layer.

In the above technical solution, further, the stator core includes a plurality of segmented laminations. The plurality of segmented punching sheets can be spliced into a stator core along the circumferential direction of the stator; when the plurality of segmented punching sheets are in an unspliced state, the first insulating layer is positioned in the stator slot and is in an open state; the wire winding is completed to a plurality of lamination sheets and the lamination sheets are in a splicing state, the first insulating layer is bent along the bending line, and the first free end of the tooth boot part insulating layer can be overlapped with the second free end so that the first insulating layer is closed to form a closed structure.

In this technical scheme, stator core includes above-mentioned a plurality of piecemeal towards the piece, and all piecemeal towards the piece connect gradually along the circumference of stator, just can splice into a complete stator core jointly. In general, a stator core formed by combining a plurality of segmented cores can complete the winding of a stator winding in a segmented state, and after the winding is completed, the segmented cores are combined into a complete stator core.

Specifically, in this embodiment, when the plurality of segmented laminations are in the unjoined state, the distance between two adjacent segmented laminations is relatively large, and the space between the stator teeth of the two segmented laminations is larger than the space of the finally-joined stator slot, so that the gap provided in the first insulating layer can enable the first insulating layer located between the two stator teeth to be in the open state. When the first insulating layer is in an open state, sufficient operating space is available for the stator winding to be wound on the stator teeth and the first insulating layer on two sides of the stator teeth according to actual needs, wherein the stator winding wound on one stator tooth is accommodated in the space surrounded by the second insulating layer and part of the first insulating layer, and the stator winding wound on the adjacent stator tooth is only wound outside part of the first insulating layer. After the split assembly of the segmented stator is completed, the distance between two adjacent stator teeth is reduced, the first insulating layer positioned between the two adjacent stator teeth is bent along the bending line until the split assembly is completed, at the moment, the first insulating layer is positioned in a complete stator groove, the first free end and the second free end of the tooth shoe insulating layer of the first insulating layer are overlapped, and the gap of the tooth shoe insulating layer is closed.

In the above aspect, the bend line may protrude from an inner surface of the yoke insulating layer.

In this embodiment, the bending line is disposed on the yoke insulating layer and protrudes from an inner surface of the yoke insulating layer, and the first insulating layer is bent along the bending line to open or close the notch.

In the above technical solution, further, the insulating layer further includes a third insulating layer. One end of the third insulating layer is connected to the first insulating layer, and the other end of the third insulating layer extends toward the inside of the first of the two regions.

In the technical scheme, the first insulating layer is positioned in the stator slot, the first insulating layer surrounds to form a space, two ends of the second insulating layer are connected to the first insulating layer, and the space surrounded by the first insulating layer is divided into two areas by the second insulating layer. Specifically, one end of the third insulating layer is connected to the first insulating layer, and the other end of the third insulating layer extends into a space surrounded by the first insulating layer, which means that the third insulating layer extends into one of the two regions, and for convenience of distinguishing, the region into which the third insulating layer extends is taken as the first region.

In the above technical solution, further, one end of the second insulating layer is connected to the bending line, and the other end of the second insulating layer is connected to the first free end of the tooth boot insulating layer; the third insulation layer is connected to the second free end of the tooth shoe insulation layer.

In this technical solution, the second insulating layer is located inside a space surrounded by the first insulating layer and divides the space into two regions, one end of the second insulating layer is connected to the bending line provided on the yoke insulating layer, and the other end of the second insulating layer is connected to the first free end of the tooth shoe insulating layer, so that the two regions divided by the second insulating layer are equal in size, and windings with substantially the same number can be wound in the two regions.

Furthermore, one end of the third insulating layer is connected with the second free end of the tooth boot insulating layer, and the other end of the third insulating layer extends into the first area isolated by the second insulating layer. Under the condition that the gap is closed, the first free end and the second free end of the yoke part insulating layer are overlapped, and the first insulating layers are enclosed to form a relatively closed structure.

Furthermore, the joint of the third insulating layer and the second free end abuts against the joint of the second insulating layer and the first free end, the free end of the third insulating layer extends into the first region, at this time, the partial tooth boot insulating layer where the second free end is located can be tightly connected with the partial tooth boot insulating layer where the first free end is located due to the abutting between the third insulating layer and the second insulating layer, the first free end can be firmly overlapped with the second free end, the partial tooth boot insulating layer where the second free end is located cannot move due to vibration and the like in the working process, the first free end and the second free end are easily removed from overlapping, the gap is reopened, and the first insulating layer cannot continue to have the effect of slot insulation, so that the normal operation of the stator is affected.

Furthermore, after the stator windings are installed, the gap is closed, the space enclosed by the first insulating layer is divided into two areas by the second insulating layer, the first free end and the second free end of the tooth boot insulating layer are overlapped, the joint of the third insulating layer and the second free end is tightly abutted to the joint of the second insulating layer and the first free end, the third insulating layer extends into the first area, the space in the same first insulating layer is penetrated by the two adjacent stator windings, and the two stator windings are isolated by the second insulating layer and respectively penetrate through the two areas, so that the effect of mutual insulation is realized.

In the above technical solution, further, the third insulating layer and the second insulating layer have different extending directions.

In this embodiment, one end of the third insulating layer is connected to the second free end, and the other end extends into the first region. Specifically, under the condition that the notch is closed, the first free end coincides with the second free end, the joint of the third insulating layer and the second free end abuts against the joint of the second insulating layer and the first free end, the partial tooth boot part insulating layer where the second free end is located can be tightly connected with the partial tooth boot part insulating layer where the first free end is located due to the abutting between the third insulating layer and the second insulating layer, the first free end can also firmly coincide with the second free end, and the notch cannot be opened easily. However, if the extending directions of the third insulating layer and the second insulating layer are the same, the second insulating layer and the third insulating layer are parallel to each other, the interaction force between the two layers is very small, and the abutting effect is poor. In order to avoid the situation, the extending direction of the third insulating layer in the first region needs to be set, so that the extending direction of the third insulating layer is different from the extending direction of the second insulating layer, the interaction force at the abutting position of the second insulating layer and the third insulating layer is enhanced, and the overlapping position of the first free end and the second free end is tighter.

In the above technical solution, further, the length of the second insulating layer is L1, the length of the third insulating layer is L2, and the relationship between L1 and L2 satisfies: 0mm < L2 < 0.5 XL 1.

In this technical scheme, above-mentioned second insulating layer and third insulating layer all set up in the synthetic space that first insulating layer encloses and link to each other with the first insulating layer, and the second insulating layer separates this space into two regions, and the one end of second insulating layer is connected on the kinking that sets up on the yoke portion insulating layer, and the first free end department at tooth boots portion insulating layer is connected to the other end of second insulating layer, and third insulating layer one end is connected with the second free end of tooth boots portion insulating layer, and the other end then stretches into in the first region that is kept apart by the second insulating layer. It follows that the second insulating layer is longer than the third insulating layer, irrespective of the particular circumstances in which the third insulating layer is folded and curled.

Specifically, the length of the second insulating layer is taken as L1, and the length of the third insulating layer is taken as L2. The value of L2 should not be too large, otherwise it would occupy space in the first region, which would make assembly of the stator winding difficult, and also reduce the full slot fraction in the stator slots, which would affect the performance of the machine. Specifically, in the embodiment provided in the present technical solution, the length requirement of L2 is as follows: 0mm < L2 < 0.5 XL 1. When the length of L2 falls within the above-described length range, the third insulating layer can occupy the smallest space in the first region, thereby reducing the influence on the stator winding installation and increasing the full slot ratio as much as possible, while sufficiently exerting its effect.

In the above technical solution, further, the length of the third insulating layer is L2, the slot opening width of the stator slot is W, and the relationship between W and L2 satisfies: l2 is more than or equal to 0.5 xW.

In this embodiment, the length of the third insulating layer is set to L2, and the slot width of the stator slot is set to W. The width W of the slot is not too large, since the first insulating layer needs to be clamped between a pair of tooth shoes that are close to each other to function properly. And in the process that the first insulating layer is converted into the closed state from the open state, a pair of tooth shoes which are close to each other are continuously close to each other, if the length L2 of the third insulating layer is smaller than the width W of the notch, or the sizes of the third insulating layer and the notch are close to each other, the third insulating layer easily slides out from the notch, the first region is not communicated with the outside only at two ends in the axial direction of the stator any more, and the effect of slot insulation cannot be realized. In an embodiment of the present disclosure, the width W of the notch and the length L2 of the third insulating layer are defined as follows: l2 is more than or equal to 0.5 xW.

According to a second aspect of the present invention, there is also provided an electric machine comprising a stator and a rotor as defined in any one of the above claims. The rotor is disposed within the stator.

The main components of the motor are a stator which is fixedly arranged and a rotor which is rotatably arranged. Under the drive of electromagnetic force generated after the stator is electrified, the rotor starts to rotate and drives related equipment connected with the rotor to work.

The motor provided by the invention comprises the stator of any technical scheme. Therefore, the above-mentioned motor has all the advantages of the above-mentioned stator, and is not discussed one by one here.

According to a third aspect of the present invention, there is also provided a compressor comprising the motor as set forth in the above aspect.

The compressor provided by the invention comprises the motor according to the technical scheme. Therefore, the compressor has all the advantages of the motor, and is not discussed in detail herein.

According to a fourth aspect of the present invention, there is also provided a refrigeration apparatus comprising the motor as set forth in the above aspect, or the compressor as set forth in the above aspect.

A refrigeration device is a typical electric device that requires the use of an electric motor. The conventional refrigeration equipment needs to use a compressor, only few special refrigeration equipment is needed, the compressor is not arranged, and other types of equipment are directly driven by the motor to cool.

The refrigeration equipment provided by the invention comprises the motor in the technical scheme or the compressor in the technical scheme. Therefore, the refrigeration equipment has all the advantages of the motor or the compressor, which are not discussed in detail herein.

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 view of a stator in an embodiment of the invention;

fig. 2 is a schematic structural diagram showing the juxtaposition of two adjacent core blocks in the embodiment of the present invention;

fig. 3 is a schematic structural diagram of two adjacent iron core blocks after being connected in the embodiment of the invention;

FIG. 4 illustrates a graph comparing efficiency of a motor provided by an embodiment of the present invention with a prior art motor;

fig. 5 shows a schematic view of a compressor in an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:

100 stator cores, 110 stator teeth, 120 stator slots, 121 notches and 130 segmented punching sheets; 200 stator windings; 300 insulation layer, 310 first insulation layer, 311 yoke insulation layer, 312 tooth insulation layer, 313 tooth shoe insulation layer, 314 meander line, 315 first region, 316 first free end, 317 second free end, 320 second insulation layer, 330 third insulation layer; 400 compressor, 410 shell, 420 motor, 430 crankshaft, 440 main bearing, 450 cylinder, 460 piston, 470 secondary bearing, 480 reservoir.

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 5.

As shown in fig. 1 and 3, a stator according to a first aspect of the present invention includes: stator core 100, stator winding 200, and insulation layer 300. The stator core 100 includes a plurality of stator teeth 110 disposed at intervals, and a stator slot 120 is formed between two adjacent stator teeth 110; the stator winding 200 is wound around the stator teeth 110, and at least a part of the stator winding 200 is located in the stator slot 120; the insulating layer 300 is disposed in the stator slot 120 and between the stator winding 200 and the stator teeth 110, the insulating layer 300 divides the stator slot 120 into two regions, and the stator winding 200 wound on different stator teeth 110 is disposed in the two regions of the insulating layer 300.

Specifically, the stator winding 200 is disposed on the stator core 100, the stator core 100 is substantially tubular, the stator core 100 is disposed with a plurality of stator teeth 110 and stator slots 120, the stator teeth 110 protrude toward the hollow portion of the interior of the stator core 100, the stator slots 120 are disposed between every two stator teeth 110, and each stator slot 120 is formed by sandwiching the stator teeth 110 on two sides of the stator slot 120.

Further, the stator winding 200 is a winding wound on the stator, and is a coil formed by winding a fixed member on a conductive wire made of a material with good conductivity, such as a copper wire, and specifically, the stator winding 200 is wound on the stator teeth 110 and passes through the stator slots 120 on both sides of the stator teeth 110, and is further disposed on the stator core 100. Since the material, size, position and number of turns of the conductive wire wound on the stator teeth 110 of the stator winding 200 directly affect the performance of the stator, during the manufacturing and assembling of the stator, more windings need to be wound on the stator teeth 110 as much as possible, so as to improve the full slot ratio of the motor 420 and further improve the performance of the motor 420.

Further, an insulating layer 300 is disposed inside the stator slot 120. The motor 420 operates based on the principle that the operating magnetic field applies a force to a current, and then converts electric energy into mechanical energy, so that the motor 420 passes a large current and forms a magnetic field with a large intensity when operating. In order to ensure the normal operation of the motor 420, insulation treatment is often required between the components inside the motor 420, and the insulation treatment is one of the methods of providing the insulation layer 300 inside the stator slot 120. The insulating layer 300 isolates the stator winding 200 from the stator teeth 110, so that the stator winding 200 and the stator teeth 110 are insulated, namely, the effect of slot insulation is achieved; meanwhile, the same stator slot 120 is divided into two regions by the insulating layer 300, and the two stator windings 200 wound on different stator teeth 110 are separated by the insulating layer 300 when passing through the same stator slot 120, so that insulation is realized between two adjacent stator windings 200, that is, phase insulation, that is, the insulating layer 300 can simultaneously satisfy the slot insulation between the stator winding 200 and the stator core 100 and the phase insulation of the stator windings 200 wound on different stator teeth 110.

Specifically, the stator is composed of a stator core 100, a stator winding 200, and an insulating layer 300. The stator core 100 is generally in a tubular structure, the stator core 100 is provided with stator teeth 110 and stator slots 120, the stator teeth 110 are arranged on the inner wall of the stator core 100 at intervals and protrude towards the inside in a hollow manner, and the stator slots 120 are arranged between two adjacent stator teeth 110; the stator winding 200 is a conductive coil wound on the stator, the stator winding 200 is wound on the stator teeth 110 and penetrates through the stator slots 120 on two sides of the stator teeth 110, under the condition of not influencing normal operation, in order to enable the performance of the stator to be optimal, the number of turns of the coil of the stator winding 200 is required to be as large as possible, and the stator winding 200 also occupies the space in the stator slots 120 as large as possible; the insulating layer 300 is arranged in the stator slot 120 of the stator core 100, the insulating layer 300 is attached to the inner wall of the stator slot 120 and encloses a space, when the stator winding 200 is wound, the stator winding 200 penetrates through the space enclosed by the insulating layer 300 at two sides of the stator tooth 110 and is wound on the stator tooth 110, the insulating layer 300 at two sides of the stator tooth 110 is used for realizing slot insulation between the stator winding 200 and the stator tooth 110 wound by the stator winding 200, the same insulating layer 300 is divided into two regions, two stator windings 200 wound on two adjacent stator teeth 110 respectively penetrate through one of the two regions, the two stator windings 200 are isolated by the insulating layer 300 to realize phase insulation, and the stator is prevented from being interfered by an electromagnetic field generated by the stator during normal operation as much as possible.

as shown in fig. 1, 2 and 3, in this embodiment, the insulating layer 300 includes a first insulating layer 310 and a second insulating layer 320. The first insulating layer 310 is used for spacing the stator winding 200 from the stator teeth 110; the second insulating layer 320 is used for winding the stator windings 200 of different stator teeth 110 at intervals, and two ends of the second insulating layer 320 are respectively connected to the first insulating layer 310, so as to divide the space enclosed by the first insulating layer 310 into two regions.

In some possible embodiments, the insulating layer 300 includes a first insulating layer 310 and a second insulating layer 320. Specifically, the first insulating layer 310 is disposed around the stator slot 120, and the first insulating layer 310 is attached to the sidewall of the stator tooth 110. When the stator winding 200 is wound, the stator winding 200 penetrates through the space isolated in the stator slot 120 by the first insulating layer 310 and is wound around the stator teeth 110. After the stator winding 200 is wound, the first insulating layer 310 is disposed between the portion of the stator winding 200 located in the stator slot 120 and the stator tooth 110, and the first insulating layer 310 is disposed between the stator winding 200 and the stator tooth 110 and separates the stator winding 200 from the sidewall of the stator tooth 110, so as to achieve the effect of slot insulation.

Further, the second insulating layer 320 is located inside the space enclosed by the first insulating layer 310, and both ends of the second insulating layer 320 are connected to the first insulating layer 310, so as to divide the space enclosed by the first insulating layer 310 into two regions, and the edges of the two regions respectively abut against two adjacent different stator teeth 110. When the stator windings 200 are wound, two adjacent stator windings 200 need to penetrate through the space enclosed by the same first insulating layer 310, at this time, the two stator windings 200 respectively penetrate through two different areas in the same first insulating layer 310, and the second insulating layer 320 is located between two adjacent stator windings 200 wound on different stator teeth 110, so as to achieve phase insulation between the stator windings 200.

Specifically, in the present embodiment, the first insulating layer 310 and the second insulating layer 320 both belong to the same insulating layer 300, and a portion of the insulating layer 300, that is, the second insulating layer 320, is bent and then connected to another portion of the insulating layer 300, that is, the middle position of the first insulating layer 310, so that the space enclosed by the first insulating layer 310 is divided into two regions by the second insulating layer 320.

As shown in fig. 1, 2 and 3, in this embodiment, the first insulation layer 310 includes a yoke insulation layer 311, a tooth insulation layer 312 and a tooth shoe insulation layer 313, which are connected, and a meander line 314. The yoke insulating layer 311, the tooth insulating layer 312, and the tooth shoe insulating layer 313 connected as described above, the tooth shoe insulating layer 313 having a notch to enable the first insulating layer 310 to be opened or closed; the bending line 314 extends in the axial direction of the stator, the bending line 314 is provided in the yoke insulating layer 311, and the yoke insulating layer 311 can be bent along the bending line 314.

In one possible embodiment, the first insulation layer 310 includes a yoke insulation layer 311, a tooth insulation layer 312, and a tooth shoe insulation layer 313, which are connected. The first insulating layer 310 is located inside the stator slot 120 and encloses a long tube fitting the stator slot 120, and the sides of the long tube are a yoke insulating layer 311, a tooth insulating layer 312, and a tooth shoe insulating layer 313, respectively. The yoke insulating layer 311 is a portion where the first insulating layer 310 is attached to the bottom of the stator slot 120 and is also the inner diameter of the stator yoke; the tooth insulating layer 312 is a portion where the first insulating layer 310 is attached to the side walls on both sides of the stator tooth 110; the tooth shoe insulating layer 313 is a part of the first insulating layer 310, which is attached to the tooth shoes of two adjacent stator teeth 110, and a gap is formed in the tooth shoe insulating layer 313, when the tooth shoe insulating layers 313 on two sides of the gap are connected, the gap is closed, and the first insulating layer 310 is in a closed state; when the tooth shoe insulating layers 313 on both sides of the gap are separated, the gap is opened and the first insulating layer 310 is in an opened state. The location of the notch is not particularly required, but in practice, the notch is often located between the tooth shoe insulating layer 313 and the notch 121 of the stator slot 120 for convenience of operation.

Further, in this embodiment, the first insulating layer 310 further includes the bending line 314. The bending line 314 extends along the axial direction of the stator slot 120 and is disposed on the first insulating layer 310, so that when the position of the first insulating layer 310 where the bending line 314 is disposed is bent along the bending line 314, the gap is opened or closed, so as to achieve the purpose of making the first insulating layer 310 in an open state or making the first insulating layer 310 in a closed state.

Further, the position of the bending line 314 can be selected in many ways, and more than one bending line 314 can be disposed on the same first insulating layer 310, in this embodiment, the bending line 314 is disposed on the yoke insulating layer 311 to meet the actual requirement.

As shown in fig. 1, 2 and 3, in this embodiment, the stator core 100 includes a plurality of segmented laminations 130. The plurality of segmented laminations 130 can be spliced into the stator core 100 along the circumferential direction of the stator; when the plurality of segmented laminations 130 are in an unjoined state, the first insulating layer 310 is positioned in the stator slot 120 and is in an open state; when the plurality of segment punches 130 are wound and in the split state, the first insulating layer 310 is bent along the bending line 314, and the first free end 316 of the tooth shoe insulating layer 313 can coincide with the second free end 317 so that the first insulating layer 310 is closed into a closed structure.

In a possible embodiment, the stator core 100 includes the above-mentioned plurality of segmented laminations 130, and all the segmented laminations 130 are connected in sequence along the circumferential direction of the stator, so as to jointly form a complete stator core 100. In general, the stator core 100 formed by combining a plurality of segmented cores may be wound on the stator winding 200 in a segmented state, and after the winding is completed, the plurality of segmented cores may be combined into a complete stator core 100.

Specifically, in the present embodiment, when the plurality of segmented laminations 130 are in the non-split state, the distance between two adjacent segmented laminations 130 is larger, and the space between the stator teeth 110 of the two segmented laminations 130 is larger than the space of the finally-split stator slot 120, so that the gap provided in the first insulating layer 310 can enable the first insulating layer 310 located between the two stator teeth 110 to be in the open state. When the first insulating layer 310 is in the open state, there is enough operating space for the stator winding 200 to be wound on the stator teeth 110 and the first insulating layer 310 on both sides of the stator teeth 110 according to actual requirements, wherein the stator winding 200 wound on one stator tooth 110 is accommodated in the space surrounded by the second insulating layer 320 and a part of the first insulating layer 310, and the stator winding 200 wound on the adjacent stator tooth 110 is wound only outside a part of the first insulating layer 310. After the split assembly of the segmented stator is completed, the distance between two adjacent stator teeth 110 is reduced, the first insulating layer 310 between the two adjacent stator teeth 110 is bent along the bending line 314 until the split assembly is completed, at this time, the first insulating layer 310 is located in one complete stator slot 120, the first free end 316 of the tooth shoe insulating layer 313 of the first insulating layer 310 is overlapped with the second free end 317, and the gap of the tooth shoe insulating layer 313 is closed, so that the first insulating layer 310 is in a closed state, the stator winding 200 wound on one stator tooth 110 is still accommodated in the space surrounded by the second insulating layer 320 and a part of the first insulating layer 310, and the stator winding 200 wound on the adjacent stator tooth 110 is close to another part of the windings and is spaced by the second insulating layer 320.

As shown in fig. 1 and 3, in this embodiment, the bending line 314 is disposed to protrude from the inner surface of the yoke insulating layer 311.

In a possible embodiment, the bending line 314 is disposed on the yoke insulating layer 311 and protrudes from an inner surface of the yoke insulating layer 311, and the first insulating layer 310 is bent along the bending line 314 to open or close the gap, so that in the embodiment provided in the present disclosure, when the first insulating layer 310 is in the closed state, the yoke insulating layer 311 is bent and protrudes along the bending line 314.

As shown in fig. 1, 2 and 3, in this embodiment, the insulating layer further includes a third insulating layer 330. One end of the third insulating layer 330 is connected to the first insulating layer 310, and the other end of the third insulating layer 330 extends into the first region 315 of the two regions.

In one possible embodiment, the first insulating layer 310 is located in the stator slot 120, the first insulating layer 310 encloses a space, both ends of the second insulating layer 320 are connected to the first insulating layer 310, and the second insulating layer 320 divides the space enclosed by the first insulating layer 310 into two regions. Specifically, one end of the third insulating layer 330 is connected to the first insulating layer 310, and the other end of the third insulating layer 330 extends into the space enclosed by the first insulating layer 310, which means that the third insulating layer 330 extends into one of the two regions, and for convenience of distinguishing, the region into which the third insulating layer 330 extends is taken as the first region 315.

As shown in fig. 1, 2 and 3, in this embodiment, one end of the second insulating layer 320 is connected to the bending line 314, and the other end of the second insulating layer 320 is connected to the first free end 316 of the tooth shoe insulating layer 313; the third insulating layer 330 is connected to the second free end 317 of the tooth shoe insulating layer 313.

In a possible embodiment, the second insulating layer 320 is located inside the space surrounded by the first insulating layer 310 and divides the space into two regions, one end of the second insulating layer 320 is connected to the bending line 314 provided on the yoke insulating layer 311, and the other end of the second insulating layer 320 is connected to the first free end 316 of the tooth shoe insulating layer 313, so that the two regions separated by the second insulating layer 320 are equal in size, and a substantially uniform number of windings can be wound in the two regions.

Further, one end of the third insulating layer 330 is connected to the second free end 317 of the tooth shoe insulating layer 313, and the other end thereof extends into the first region 315 partitioned by the second insulating layer 320. In the case of a closed gap, the first free end 316 of the yoke insulating layer 311 coincides with the second free end 317, and the first insulating layer 310 encloses a relatively closed structure.

Further, the joint of the third insulating layer 330 and the second free end 317 abuts against the joint of the second insulating layer 320 and the first free end 316, the free end of the third insulating layer 330 extends into the first region 315, at this time, the partial tooth boot insulating layer 313 where the second free end 317 is located can be tightly connected with the partial tooth boot insulating layer 313 where the first free end 316 is located due to the abutment between the third insulating layer 330 and the second insulating layer 320, the first free end 316 can also be firmly overlapped with the second free end 317, and the phenomenon that the partial tooth boot insulating layer 313 where the second free end is located moves due to vibration and the like in the working process cannot occur, the first free end 316 and the second free end are easily removed from overlapping, the gap 317 is reopened, and the first insulating layer 310 cannot continue to have the slot insulating effect, which affects the normal operation of the stator.

Further, after the stator windings 200 are installed, the gap is closed, the space surrounded by the first insulating layer 310 is divided into two areas by the second insulating layer 320, the first free end 316 and the second free end 317 of the tooth boot insulating layer 313 are overlapped, the joint of the third insulating layer 330 and the second free end 317 abuts against the joint of the second insulating layer 320 and the first free end 316, the third insulating layer 330 extends into the first area 315, the space in the same first insulating layer 310 is penetrated by two adjacent stator windings 200, the two stator windings 200 are separated by the second insulating layer 320 and respectively penetrate through the two areas, and the effect of phase insulation is achieved.

Specifically, in this embodiment, the first insulating layer 310, the second insulating layer 320, and the third insulating layer 330 all belong to the same insulating layer 300, and the insulating layer 300 is divided into three parts, wherein the first part and the third part are respectively located at two ends of the second part. The first part, i.e. the second insulating layer 320, is bent and then connected to the second part of the whole insulating layer 300, i.e. the middle position of the first insulating layer 310, so that the space enclosed by the first insulating layer 310 is divided into two regions by the second insulating layer 320; a third portion, which is one end of the third insulating layer 330, as a free end, extends into the space enclosed by the first insulating layer 310; the two ends of the second part are connected and overlapped, and the joint of the first part and the second part is abutted against the joint of the second part and the third part.

As shown in fig. 1 and fig. 3, in this embodiment, the extending directions of the third insulating layer 330 and the second insulating layer 320 are different.

In one possible embodiment, one end of the third insulating layer 330 is connected to the second free end 317, and the other end extends into the first region 315. Specifically, under the condition that the gap is closed, the first free end 316 coincides with the second free end 317, the joint of the third insulating layer 330 and the second free end 317 abuts against the joint of the second insulating layer 320 and the first free end 316, the partial tooth boot insulating layer 313 where the second free end 317 is located can be tightly connected with the partial tooth boot insulating layer 313 where the first free end 316 is located due to the abutting between the third insulating layer 330 and the second insulating layer 320, the first free end 316 can also firmly coincide with the second free end 317, and the gap cannot be easily opened. However, if the extending directions of the third insulating layer 330 and the second insulating layer 320 are the same, the second insulating layer 320 and the third insulating layer 330 are parallel to each other, the interaction force between the two layers is very small, and the tightening effect is poor. In order to avoid this situation, it is necessary to set the extending direction of the third insulating layer 330 in the first region 315, so that the extending direction of the third insulating layer 330 is different from the extending direction of the second insulating layer 320, and the interaction force at the abutting position of the second insulating layer 320 and the third insulating layer 330 is enhanced, so that the overlapping position of the first free end 316 and the second free end 317 is closer.

As shown in fig. 1, 2 and 3, in this embodiment, the length of the second insulating layer 320 is L1, the length of the third insulating layer 330 is L2, and the relationship between L1 and L2 satisfies: 0mm < L2 < 0.5 XL 1.

In one possible embodiment, the second insulating layer 320 and the third insulating layer 330 are disposed in a space enclosed by the first insulating layer 310 and connected to the first insulating layer 310, the second insulating layer 320 divides the space into two regions, one end of the second insulating layer 320 is connected to the bending line 314 disposed on the yoke insulating layer 311, the other end of the second insulating layer 320 is connected to the first free end 316 of the tooth shoe insulating layer 313, and one end of the third insulating layer 330 is connected to the second free end 317 of the tooth shoe insulating layer 313, and the other end extends into the first region 315 separated by the second insulating layer 320. It follows that the second insulating layer 320 is longer than the third insulating layer 330 regardless of the particular circumstances in which the third insulating layer 330 is folded and rolled.

Specifically, the length of the second insulating layer 320 is taken as L1, and the length of the third insulating layer 330 is taken as L2. The value of L2 should not be too large, otherwise it would occupy space in first region 315, making assembly of stator winding 200 difficult, and also reducing the full slot fraction in stator slots 120, which affects motor 420 performance. Specifically, in the embodiment provided in the present technical solution, the length requirement of L2 is as follows: 0mm < L2 < 0.5 XL 1. When the length of L2 falls within the above-described length range, it is possible to minimize the space occupied by third insulating layer 330 in first region 315, reduce the influence on stator winding 200, and increase the full slot fraction as much as possible, while sufficiently exerting its effect on third insulating layer 330.

As shown in fig. 1 and 3, in this embodiment, the length of the third insulating layer 330 is L2, the width of the slot opening 121 of the stator slot 120 is W, and the relationship between W and L2 satisfies: l2 is more than or equal to 0.5 xW.

In one possible embodiment, the length of the third insulating layer 330 is set to L2 and the width of the slot opening 121 of the stator slot 120 is set to W. The width W of the slot 121 is not too large, since the first insulating layer 310 needs to be clamped between a pair of tooth shoes that are close to each other to function properly. In the process of converting the first insulating layer 310 from the open state to the closed state, the pair of tooth shoes close to each other are continuously close to each other, and if the length L2 of the third insulating layer 330 is smaller than the width W of the slot 121 or the two tooth shoes are close to each other, the third insulating layer 330 easily slides out of the slot 121, and the first region 315 does not keep communicating with the outside only at the two ends in the axial direction of the stator any more, and the effect of slot insulation cannot be achieved. In the embodiment proposed in the present disclosure, the width W of the notch 121 and the length L2 of the third insulating layer 330 are defined as follows: l2 is more than or equal to 0.5 xW.

Embodiments of the present application also provide an electric machine 420, where the electric machine 420 includes a stator and a rotor as in any of the above embodiments. The rotor is disposed within the stator.

The main components of the motor 420 are a stator, which is fixedly disposed, and a rotor, which is rotatably disposed. Under the drive of electromagnetic force generated after the stator is electrified, the rotor starts to rotate and drives related equipment connected with the rotor to work. As shown in fig. 4, the motor 420 having any of the above-described embodiments mounted thereon has a higher motor efficiency than the motor 420 of the related art. In one embodiment, the motor efficiency of a conventional motor 420 is 94.62%, and after replacing a stator of the previous embodiment, this embodiment provides a motor efficiency increase of the motor 420 to 94.81%.

The motor 420 of the present invention includes a stator as in any of the above embodiments. Accordingly, the motor 420 has all the advantages of the stator, which will not be discussed herein.

As shown in fig. 5, the embodiment of the present application also proposes a compressor 400, and the compressor 400 includes a motor 420 as proposed in the above embodiment.

The compressor 400 according to the present invention includes the motor 420 as in the above-described embodiment. Accordingly, the compressor 400 has all the advantages of the motor 420, which will not be discussed herein.

In a possible embodiment, the compressor 400 is provided with the motor 420 of the above embodiment, and further includes a housing 410, a crankshaft 430, a main bearing 440, a cylinder 450, a piston 460, a secondary bearing 470, and an accumulator 480.

Embodiments of the present application also provide a refrigerating apparatus including the motor 420 as set forth in the above embodiments, or the compressor 400 as set forth in the above embodiments.

A refrigeration device is a typical electrical device that requires the use of a motor 420. The conventional refrigeration equipment needs to use the compressor 400, only few special refrigeration equipment is needed, the compressor 400 is not arranged, and other types of equipment are directly driven by the motor 420 to carry out cooling refrigeration.

The refrigerating apparatus of the present invention includes the motor 420 as in the above embodiment, or the compressor 400 as in the above embodiment. Therefore, the refrigeration apparatus has all the advantages of the motor 420 or the compressor 400, which are not discussed herein.

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 is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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, characterized in that the stator comprises:

the stator core comprises a plurality of stator teeth arranged at intervals, and a stator slot is formed between every two adjacent stator teeth;

the stator winding is wound on the stator teeth, and at least one part of the stator winding is positioned in the stator slot;

the insulating layer is arranged in the stator slot and positioned between the stator winding and the stator teeth, the insulating layer divides the stator slot into two areas, and the stator windings wound on different stator teeth are positioned in the two areas of the insulating layer;

wherein the insulating layer includes:

a first insulating layer for spacing the stator winding from the stator teeth;

and the second insulating layer is used for winding stator windings arranged on different stator teeth at intervals, and two ends of the second insulating layer are respectively connected to the first insulating layer so as to divide the space enclosed by the first insulating layer into the two areas.

2. The stator of claim 1, wherein the first insulating layer comprises:

a yoke insulating layer, a tooth insulating layer and a tooth shoe insulating layer connected, the tooth shoe insulating layer having a gap to enable the first insulating layer to be opened or closed;

the bending line is arranged on the yoke insulating layer and can be bent along the bending line.

3. The stator of claim 2, wherein the stator core comprises:

the plurality of segmented punching sheets can be spliced into the stator core along the circumferential direction of the stator;

when the plurality of segmented punching sheets are in an unspliced state, the first insulating layer is positioned in the stator slot and is in an open state; when the plurality of segmented punching sheets finish winding and are in a splicing state, the first insulating layer is bent along the bending line, and the first free end of the tooth boot insulating layer can be overlapped with the second free end of the tooth boot insulating layer so that the first insulating layer is closed to form a closed structure.

4. The stator according to claim 3,

the bending line protrudes out of the inner surface of the yoke insulating layer.

5. The stator of claim 3, wherein the insulation layer further comprises:

and one end of the third insulating layer is connected with the first insulating layer, and the other end of the third insulating layer extends towards the inside of the first region of the two regions.

6. The stator as claimed in claim 5, wherein one end of the second insulating layer is connected to the bending line, and the other end of the second insulating layer is connected to the first free end of the tooth shoe insulating layer; the third insulation layer is connected to a second free end of the tooth shoe insulation layer.

7. The stator according to claim 6,

the third insulating layer and the second insulating layer have different extending directions.

8. The stator of claim 5, wherein the second insulation layer has a length of L1, the third insulation layer has a length of L2, and the relationship between L1 and L2 satisfies: 0mm < L2 < 0.5 XL 1.

9. The stator of claim 5, wherein the third insulation layer has a length of L2, the stator slots have a slot width of W, and the relationship between W and L2 is such that: l2 is more than or equal to 0.5 xW.

10. An electric machine, comprising:

the stator of any one of claims 1 to 9;

a rotor disposed within the stator.

11. A compressor, comprising:

the electric machine of claim 10.

12. A refrigeration apparatus, comprising:

the motor of claim 10, or the compressor of claim 11.