WO2022068051A1

WO2022068051A1 - Stator assembly, motor, and compressor

Info

Publication number: WO2022068051A1
Application number: PCT/CN2020/134780
Authority: WO
Inventors: 毛临书; 王玉龙; 李洋; 邱小华; 江波
Original assignee: 安徽美芝精密制造有限公司
Priority date: 2020-09-29
Filing date: 2020-12-09
Publication date: 2022-04-07

Abstract

A stator assembly (100), a motor (200), and a compressor (300). The stator assembly (100) comprises a stator core (110) and a stopper (120). The stator core (110) has a mounting port (111) extending through axially. The mounting port (111) is used for mounting a rotor assembly (210) of a motor (200). The stopper (120) is provided at an axial end portion of the stator core (110). By providing the stopper (120) at the axial end portion of the stator core (110), the oil-air mixture thrown out can be stopped, so as to minimize the oil-air mixture thrown onto a housing (310) of the compressor (300) provided with the motor (200), and prevent the oil-air mixture from being discharged to the outside by means of an air discharge port on the housing (310), thereby greatly reducing the oil discharge amount of the compressor (300), and improving the reliability of the compressor (300) and the energy efficiency of the compressor (300).

Description

Stator assemblies, motors and compressors

This application is required to be submitted to the State Intellectual Property Office of China on September 29, 2020, the application number is "202011051842.1", the invention name is "stator assembly, motor and compressor" and the application number is "202022197009.X", the invention name is " Priority of the Chinese Patent Application for Stator Assembly, Electric Motor and Compressor", the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of motor equipment, and in particular, to a stator assembly, a motor and a compressor.

Background technique

At present, as the core component of the compressor, the motor provides rotational power for the compressor, and its performance directly affects the performance of the compressor. The compressor includes a motor and a compression part located on the axial side of the motor. The refrigerant in the high pressure chamber in the compression part and the lubricating oil inside the compressor will flow through the motor. When the rotor in the motor rotates at a high speed relative to the stator, the oil-air mixture of the refrigerant and lubricating oil on the side of the compression part will flow to the axial end face of the rotor. At the casing of the compressor, it is then discharged to the outside through the exhaust port on the casing, thereby affecting the oil output of the compressor.

SUMMARY OF THE INVENTION

The present application aims to solve at least one of the technical problems existing in the prior art or related technologies.

To this end, a first aspect of the present application is to propose a stator assembly.

A second aspect of the present application is to propose a motor.

A third aspect of the present application is to propose a compressor.

In view of this, according to a first aspect of the present application, there is provided a stator assembly for an electric motor, the stator assembly includes a stator iron core and a stopper, the stator iron core has a mounting port penetrating through the axial direction, and the mounting port is used for For assembling the rotor assembly of the motor. Stoppers are provided at axial ends of the stator core.

The stator assembly provided by the present application includes a stator iron core and a stopper. The stator iron core is formed by stacking a plurality of stator punching pieces, and the stator punching pieces are made of silicon steel material. Among them, silicon steel refers to silicon alloy steel with a silicon content of 1.0% to 4.5% and a carbon content of less than 0.08%. Silicon steel has the characteristics of high permeability, low coercivity, and large resistivity, so hysteresis loss and eddy current loss are relatively small. The stator iron core has an axially penetrating installation opening, and the installation opening is used for assembling the rotor assembly of the motor, and the rotor assembly can rotate relative to the stator assembly. During the high-speed rotation of the rotor assembly of the motor, the rotor assembly will drive the oil-air mixture formed by the lubricating oil and the refrigerant to flow in the axial direction. When the oil-air mixture flows to the end of the rotor assembly, the centrifugal force generated during the high-speed rotation will increase Under the action, the oil and gas mixture will be thrown around. In the present application, a stopper is provided at the axial end of the stator iron core, so that the thrown out oil and gas mixture can be stopped, so as to reduce the oil and gas mixture from being thrown to have the On the casing of the compressor of the motor, so as to prevent the oil-air mixture from being discharged to the outside through the exhaust port on the casing, thereby greatly reducing the oil output of the compressor, thereby improving the reliability of the compressor and the energy efficiency of the compressor. Specifically, , the oil and gas mixture blocked by the stopper will return to the oil tank of the compressor through the gap between the stator assembly and the rotor assembly, so as to avoid the compressor oil shortage, which will cause severe friction of mechanical parts when the compressor is short of oil. , which increases the reliability risk of the compressor, and at the same time, the loss between mechanical components also increases, and the torque also increases, which will directly lead to a decrease in the energy efficiency of the compressor.

It is worth noting that the stopper may be an insulator, the stopper may be in contact with the stator iron core, and the stopper may also be in contact with the stator winding provided on the stator iron core. In order to ensure that the stator iron core and the stator in the stator assembly Due to the insulation performance between the windings, the stopper can be set as an insulator, so that the structural design and assembly difficulty of the stopper can be reduced. Of course, the stopper can also be a non-insulated piece, which will have higher requirements on the assembly position and structural design of the stopper. On the premise of ensuring the effective installation of the stopper, it is also necessary to realize the stator core and stator winding. insulating properties between.

It is worth noting that the stopper may have an integrated structure, thereby reducing the difficulty of production and preparation of the stopper and ensuring the overall structural strength of the stopper. Specifically, the stopper may be integrally formed by injection molding.

In a possible design, further, the stopper extends in an axial direction away from the stator core.

In this design, the stopper has two ends in the axial direction, one end of the stopper in the axial direction is in contact with the stator iron core, and the other end of the stopper in the axial direction is in the axial direction away from the stator iron core Extension, that is, the height of the stopper in the axial direction increases. When the oil-air mixture is thrown around under the action of centrifugal force, the stopper can better block the oil-air mixture, so that most of the oil-air mixture can be removed. The stopper blocks, so as to return to the oil sump of the compressor through the gap between the stator assembly and the rotor assembly, so that the compressor can be prevented from running out of oil.

In a possible design, further, the stopper is arranged on the stator iron core around the center line of the stator iron core.

In this design, the stopper is arranged on the stator iron core around the center line of the stator iron core, that is, the stopper is centered on the center axis of the installation port, and is arranged on the stator iron core around the center axis. The stopper is arranged around the stator iron core in a ring structure. When the oil-air mixture is thrown around under the action of centrifugal force, the stopper can block the oil-air mixture in all directions, so that most of the oil-air mixture can be stopped. It is blocked by the parts, so that it can return to the oil sump of the compressor through the gap between the stator assembly and the rotor assembly, so as to prevent the compressor from running out of oil.

In a possible design, further, the inner diameter of the stopper is greater than or equal to the inner diameter of the stator core.

In this design, the inner diameter of the stopper is greater than or equal to the inner diameter of the stator iron core, wherein the inner diameter of the stator iron core refers to the diameter of the installation opening. When the stopper has an annular structure, when the inner diameter of the stopper and the inner diameter of the stator core satisfy the above relationship, it can be ensured that the stopper does not protrude into the installation opening. At this time, the rotor assembly located in the installation opening When rotating at high speed, it will not interfere with the stopper.

It is worth noting that the stopper may not be an annular structure, and at this time, the stopper does not protrude into the installation opening.

In a possible design, further, the stopper is an insulator.

In this design, the stopper is an insulating piece, the stopper may be in contact with the stator core, and the stopper may also be in contact with the stator winding arranged on the stator core. In order to ensure the stator core and stator winding in the stator assembly The insulating properties between the stoppers can be set as insulating parts, so that the structural design and assembly difficulty of the stopper can be reduced.

In a possible design, further, the stopper is a one-piece structure.

In this design, the stopper may have an integrated structure, thereby reducing the difficulty of production and preparation of the stopper and ensuring the overall structural strength of the stopper. Specifically, the stopper may be integrally formed by injection molding.

In a possible design, further, the stator assembly further includes a plurality of stator slots, which are evenly arranged on the stator iron core, and each stator slot communicates with the installation port. The stopper includes a stopper body and at least one positioning piece, and the stopper body is arranged at an axial end of the stator iron core. At least one positioning piece is arranged on the wall surface of the stopper body close to the stator iron core, and the positioning piece extends into the notch of the stator slot.

In this design, the stator assembly further includes a plurality of stator slots arranged on the stator iron core, the plurality of stator slots are evenly spaced on the stator iron core, and the plurality of stator iron cores are all communicated with the installation port, and the stator assembly further includes a stator A part of the stator winding is accommodated in the stator slot, and a part of the stator winding is arranged on the stator iron core. The stopper includes a stopper body and a positioning piece. The stopper body is arranged at the axial end of the stator core, and the stopper body is used to stop the oil-air mixture. When the oil-air mixture is thrown around under the action of centrifugal force, the oil-air mixture It will be directly thrown on the stopper body, and the oil-air mixture can be better blocked by the stopper body, so that most of the oil-air mixture can be blocked by the stopper, thus passing through the gap between the stator assembly and the rotor assembly Return to the oil sump of the compressor, so as to avoid the compressor running out of oil. Specifically, the stopper body includes a wall surface in the axial direction and close to the stator iron core, the positioning piece is arranged on the wall surface, and the positioning piece can be inserted into the slot of the stator slot, so as to realize the reliable connection between the stopper piece and the stator iron core. The connection method is simple and reliable, and the cost is low. Specifically, the number of positioning pieces is at least one. When the number of positioning pieces is multiple, the multiple positioning pieces are evenly distributed on the stopper body. When multiple positioning pieces are matched with multiple magnet slots, it can be ensured that Reliable connection performance of the stopper in all directions. Specifically, the number of stator slots is greater than or equal to 9 and less than or equal to 48.

In a possible design, further, the circumferential width of the positioning member is greater than or equal to the slot width of the stator slot.

In this design, the circumferential width of each positioning piece is greater than or equal to the notch width of the stator slot, so that an interference fit between the positioning piece and the notch of the stator slot can be achieved. When the stopper is assembled on the stator core , through the interference fit between the positioning member and the stator slot, on the one hand, the reliable connection performance between the two can be ensured, and on the other hand, the reliable connection can be achieved without using other connection structures, with low cost and easy operation. .

In a possible design, further, the stopper further includes an assembling groove, and the assembling groove is provided on the wall surface of the stopper body close to the stator iron core, avoiding the positioning element. The stator assembly further includes a stator winding and a connecting piece. The stator winding passes through the stator slots and is arranged on the stator iron core. Connectors pass through the mounting slots to secure the stator windings to the stop body.

In this design, the wall surface of the stopper body close to the stator iron core is further provided with an assembling groove, and the assembling groove is arranged on the stopper body avoiding the positioning piece. The stopper body, the assembling groove and the positioning piece are one-piece structure, which can be realized by injection molding. Further, the stator assembly further includes a stator winding and a connecting piece, a part of the stator winding is arranged in the stator slot, and a part of the stator slot is in contact with the stator iron core. The connecting piece passes through the assembling slot to fix the stator winding and the stopper body, and further ensures the positional stability between the stopper piece and the stator core. Specifically, the connecting member is a binding strap.

In a possible design, further, the number of positioning members is multiple, the number of mounting grooves is multiple, and each mounting groove in the multiple mounting grooves is arranged at two adjacent positioning members among the multiple positioning members between pieces.

In this design, the number of positioning pieces is multiple, and the number of positioning pieces is less than or equal to the number of stator slots. When the number of positioning pieces is equal to the number of stator slots, each stator slot accommodates one positioning piece. When the number of positioning pieces is less than the stator slots, it should be ensured that the positioning pieces are evenly distributed on the stator core and located in the positioning slots, so that the force exerted by the stopper as a whole on the stator core can be more uniform and avoid the stator core. Concentration of force in a certain place will affect the performance of the motor. The number of assembly slots is multiple, and one assembly slot is provided between the two positioning pieces. For the stopper body, the connecting piece passes through the assembly slot to connect the stopper body and the stator winding, and the connecting piece can stop the body. Provides a force in the first direction. The positioning piece matched with the slot of the stator slot can provide the stopper body with a force in the second direction opposite to the first direction, that is, in the cooperation between the positioning piece and the groove, the force in both directions is uniform, so that the stopper body can be uniformly applied. The stopper is better fixed with the stator iron core and the stator winding.

According to a second aspect of the present application, there is provided a motor including the stator assembly provided by any of the above designs.

The motor provided by the present application includes the stator assembly provided by any of the above designs, and therefore has all the beneficial effects of the stator assembly, which will not be repeated here.

In a possible design, further, the motor further includes a rotor assembly, the rotor assembly is disposed in the installation opening of the stator assembly, and the rotor assembly can rotate relative to the stator assembly.

In a possible design, further, the rotor assembly includes a rotor iron core, an oil baffle and a balance weight. The rotor iron core is located in the installation opening, and the oil baffle is arranged on the axial end face of the rotor iron core close to the stopper. The balance weight is arranged on the axial end face of the rotor core.

In this design, the oil baffle is arranged on the axial end face of the rotor core close to the stopper. The oil baffle can effectively block the oil and gas mixture, preventing a large area of the oil and gas mixture from flowing to the axial end face of the rotor assembly and causing damage to the rotor assembly. Causes a sharp increase in the oil output of the compressor. The balance weight is arranged on the axial end face of the rotor iron core, and the balance weight can reduce the wind resistance loss and reduce the noise. Specifically, the balance weights are provided at both axial ends of the rotor core.

According to a third aspect of the present application, there is provided a compressor including the motor provided by any of the above designs.

The compressor provided by the present application includes the motor provided by any of the above designs, and therefore has all the beneficial effects of the motor, which will not be repeated here.

Further, the compressor includes a compression part, the compression part is arranged on an axial side of the motor, and the stopper is located at a side of the stator core away from the compression part. Specifically, the compressor is a rotary compressor or a scroll compressor.

Additional aspects and advantages of the present application will become apparent in the description section below, or learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 shows a schematic structural diagram of a stator assembly according to an embodiment of the present application;

FIG. 2 shows a partial structural schematic diagram of a stator assembly according to an embodiment of the present application;

FIG. 3 shows a schematic diagram of a partial structure of a motor according to an embodiment of the present application;

FIG. 4 shows a schematic structural diagram of a compressor according to an embodiment of the present application;

FIG. 5 shows a comparison diagram of the oil output of the compressor in an embodiment of the present application and the related art;

FIG. 6 shows an energy efficiency comparison diagram of an embodiment of the present application and a compressor in the related art.

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 6 is:

100 stator assemblies,

110 stator core, 111 mounting port, 112 stator slot, 113 stator convex teeth,

120 Stopper, 121 Stopper Body, 122 Positioning Piece, 123 Assembly Slot,

130 stator windings,

140 connectors,

200 motors,

210 rotor assembly, 211 rotor core, 212 oil baffle, 213 balance weight,

220 crankshaft,

300 compressors,

310 shell, 311 cavity,

320 compression part, 321 main bearing, 322 cylinder, 323 piston, 324 auxiliary bearing.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific details disclosed below. Example limitations.

The stator assembly 100 , the motor 200 and the compressor 300 provided according to some embodiments of the present application are described below with reference to FIGS. 1 to 6 .

Example 1

According to the first aspect of the present application, as shown in FIGS. 1 and 2 , an embodiment of the present application provides a stator assembly 100 for an electric motor 200 , the stator assembly 100 includes a stator iron core 110 and a stopper 120 , the stator iron core 110 has an installation opening 111 penetrating in the axial direction, and the installation opening 111 is used for assembling the rotor assembly 210 of the motor 200 . The stopper 120 is provided at the axial end portion of the stator core 110 .

The stator assembly 100 provided by the present application includes a stator iron core 110 and a stopper 120. The stator iron core 110 is formed by stacking a plurality of stator punching sheets, and the stator punching sheets are made of silicon steel material. Among them, silicon steel refers to silicon alloy steel with a silicon content of 1.0% to 4.5% and a carbon content of less than 0.08%. Silicon steel has the characteristics of high permeability, low coercivity, and large resistivity, so hysteresis loss and eddy current loss are relatively small. The stator core 110 has an axially penetrating installation opening 111 , and the installation opening 111 is used for assembling the rotor assembly 210 of the motor 200 , and the rotor assembly 210 can rotate relative to the stator assembly 100 . During the high-speed rotation of the rotor assembly 210 of the motor 200, the rotor assembly 210 drives the oil-air mixture formed by the lubricating oil and the refrigerant to flow along the axial direction. When the oil-air mixture flows to the end of the rotor assembly 210, during the high-speed rotation Under the action of the generated centrifugal force, the oil and gas mixture will be thrown around. In the present application, a stopper 120 is provided at the axial end of the stator core 110, so that the thrown out oil and gas mixture can be stopped, and the oil and gas can be reduced as much as possible. The mixture is thrown onto the casing 310 of the compressor 300 with the motor 200, thereby preventing the oil-air mixture from being discharged to the outside through the exhaust port on the casing 310, thereby greatly reducing the oil output of the compressor 300, thereby improving the compressor 300. 300 reliability and energy efficiency of the compressor 300, specifically, the oil-air mixture blocked by the stopper 120 will flow back into the oil sump of the compressor 300 through the gap between the stator assembly 100 and the rotor assembly 210, thereby avoiding The compressor 300 is short of oil. When the compressor 300 is short of oil, the mechanical parts will rub violently, which will increase the reliability risk of the compressor 300. At the same time, the loss between the mechanical parts will also increase, and the torque will also increase, which will directly lead to The energy efficiency of the compressor 300 decreases.

It is worth noting that the stopper 120 may be an insulator, the stopper 120 may be in contact with the stator core 110, and the stopper 120 may also be in contact with the stator winding 130 provided on the stator core 110. In order to ensure the stator assembly For the insulation performance between the stator iron core 110 and the stator winding 130 in 100 , the stopper 120 can be set as an insulator, so that the structural design and assembly difficulty of the stopper 120 can be reduced. Of course, the stopper 120 can also be a non-insulated piece, which will have higher requirements on the assembly position and structural design of the stopper 120. On the premise of ensuring the effective installation of the stopper 120, it is also necessary to realize the stator core. Insulation properties between 110 and stator windings 130.

It should be noted that, the stopper 120 may have an integrated structure, so that the difficulty of production and preparation of the stopper 120 can be reduced, and the overall structural strength of the stopper 120 can be ensured. Specifically, the stopper 120 may be integrally formed by injection molding.

Further, as shown in FIGS. 1 and 2 , the stopper 120 extends in an axial direction away from the stator core 110 .

In this embodiment, the stopper 120 has two ends in the axial direction, one end of the stopper 120 in the axial direction is in contact with the stator iron core 110, and the other end of the stopper 120 in the axial direction is away from the stator iron The axial direction of the core 110 extends, that is, the height of the stopper 120 in the axial direction increases. When the oil-air mixture is thrown around under the action of centrifugal force, the stopper 120 can better block the oil-air mixture, so that the Most of the oil-air mixture can be blocked by the stopper 120 , so as to flow back into the oil sump of the compressor 300 through the gap between the stator assembly 100 and the rotor assembly 210 , so that the compressor 300 can be prevented from running out of oil.

Further, as shown in FIGS. 1 and 2 , the stopper 120 is disposed on the stator iron core 110 around the center line of the stator iron core 110 .

In this embodiment, the stopper 120 is arranged on the stator iron core 110 around the center line of the stator iron core 110 , that is, the stopper 120 is centered on the center axis of the installation opening 111 , and the stator iron core 110 is arranged around the center axis. superior. The stopper 120 is arranged around the stator iron core 110 in an annular structure. When the oil-gas mixture is thrown around under the action of centrifugal force, the stopper 120 can block the oil-gas mixture in all directions, so that most of the oil-gas mixture can be blocked. It is blocked by the stopper 120, so as to flow back into the oil sump of the compressor 300 through the gap between the stator assembly 100 and the rotor assembly 210, so that the compressor 300 can be prevented from running out of oil.

Further, as shown in FIGS. 1 and 2 , the inner diameter of the stopper 120 is greater than or equal to the inner diameter of the stator core 110 .

In this embodiment, the inner diameter of the stopper 120 is greater than or equal to the inner diameter of the stator iron core 110 , wherein the inside of the stator iron core 110 refers to the diameter of the installation opening 111 . When the stopper 120 has an annular structure, when the inner diameter of the stopper 120 and the inner diameter of the stator core 110 satisfy the above relationship, it can be ensured that the stopper 120 does not protrude into the installation opening 111 . When the rotor assembly 210 located in the installation port 111 rotates at a high speed, it will not interfere with the stopper 120 .

It is worth noting that, the stopper 120 may not have an annular structure, and at this time, the stopper 120 does not extend into the installation opening 111 .

Further, the stopper 120 is an insulating member.

In this embodiment, the stopper 120 is an insulating piece, the stopper 120 may be in contact with the stator iron core 110, and the stopper 120 may also be in contact with the stator winding 130 provided on the stator iron core 110. In order to ensure the stator assembly For the insulation performance between the stator iron core 110 and the stator winding 130 in 100 , the stopper 120 can be set as an insulator, so that the structural design and assembly difficulty of the stopper 120 can be reduced.

Further, the stopper 120 is a one-piece structure.

In this embodiment, the stopper 120 may have a one-piece structure, thereby reducing the difficulty of production and preparation of the stopper 120 and ensuring the overall structural strength of the stopper 120 . Specifically, the stopper 120 may be integrally formed by injection molding.

Embodiment 2

On the basis of the first embodiment, the specific structure of the stopper 120 is described in this embodiment. As shown in FIG. 1 and FIG. 2 , further, the stator assembly 100 further includes a plurality of stator slots 112 , which are evenly arranged in the stator. On the iron core 110 , each stator slot 112 communicates with the installation port 111 . The stopper 120 includes a stopper body 121 and at least one positioning piece 122 , and the stopper body 121 is disposed at an axial end of the stator core 110 . At least one positioning member 122 is disposed on the wall surface of the stopper body 121 close to the stator iron core 110 , and the positioning member 122 extends into the notch of the stator slot 112 .

In this embodiment, the stator assembly 100 further includes a plurality of stator slots 112 disposed on the stator iron core 110 , the plurality of stator slots 112 are arranged on the stator iron core 110 at uniform intervals, and the plurality of stator iron cores 110 are all connected to the installation openings 111 is connected, the stator assembly 100 further includes a stator winding 130 , a part of the stator winding 130 is accommodated in the stator slot 112 , and a part of the stator winding 130 is arranged on the stator iron core 110 . The stopper 120 includes a stopper body 121 and a positioning piece 122. The stopper body 121 is arranged at the axial end of the stator iron core 110. The stopper body 121 is used to stop the oil-air mixture. When the oil-air mixture is thrown under the action of centrifugal force When moving around, the oil-air mixture will be directly thrown on the stopper body 121, and the oil-air mixture can be better blocked by the stopper body 121, so that most of the oil-air mixture can be blocked by the stopper 120, so as to pass through the stator The gap between the assembly 100 and the rotor assembly 210 is returned to the oil sump of the compressor 300, so that the compressor 300 can be prevented from running out of oil. Specifically, the stopper body 121 includes a wall surface in the axial direction and close to the stator iron core 110, the positioning member 122 is disposed on the wall surface, and the positioning member 122 can be inserted into the slot of the stator slot 112, so as to realize the connection between the stopper member 120 and the stator iron. The reliable connection of the core 110, the plugging method is simple and reliable, and the cost is low. Specifically, the number of the positioning members 122 is at least one. When the number of positioning members 122 is multiple, the multiple positioning members 122 are evenly distributed on the stopper body 121 , and when the multiple positioning members 122 are matched with the multiple magnet slots , the reliable connection performance of the stopper 120 in all directions can be ensured. Specifically, the number of stator slots 112 is greater than or equal to 9 and less than or equal to 48. It should be noted that the part of the stator core 110 located between the adjacent stator slots 112 is the stator protruding teeth 113 , and the stator protruding teeth 113 can facilitate the arrangement of the stator windings 130 on the stator core 110 .

Further, the circumferential width of the positioning member 122 is greater than or equal to the slot width of the stator slot 112 .

In this embodiment, the circumferential width of each positioning piece 122 is greater than or equal to the notch width of the stator slot 112 , so that interference fit between the positioning piece 122 and the notch of the stator slot 112 can be achieved. When the stopper 120 is assembled On the stator iron core 110, through the interference fit between the positioning member 122 and the stator slot 112, on the one hand, the reliable connection performance between the two can be ensured, and on the other hand, it can be realized without using other connection structures. Reliable connection, low cost and easy operation.

Further, as shown in FIG. 1 and FIG. 2 , the stopper 120 further includes an assembly groove 123 , and the assembly groove 123 is disposed on the wall surface of the stopper body 121 close to the stator core 110 , avoiding the positioning element 122 . The stator assembly 100 further includes a stator winding 130 and a connecting member 140 . The stator winding 130 passes through the stator slots 112 and is disposed on the stator core 110 . The connecting piece 140 passes through the fitting slot 123 to fix the stator winding 130 and the stopper body 121 .

In this embodiment, the wall surface of the stopper body 121 close to the stator iron core 110 is further provided with an assembly groove 123 , and the assembly groove 123 is provided on the stopper body 121 to avoid the positioning member 122 . The stopper body 121 , the assembling groove 123 and the positioning member 122 are integral structures, which can be realized by injection molding. Further, the stator assembly 100 further includes a stator winding 130 and a connecting member 140 . A part of the stator winding 130 is disposed in the stator slot 112 , and a part of the stator slot 112 is in contact with the stator iron core 110 . The connecting piece 140 passes through the assembling slot 123 to fix the stator winding 130 and the stopper body 121 , and further ensures the positional stability between the stopper piece 120 and the stator core 110 . Specifically, the connecting member 140 is a binding strap.

Further, as shown in FIGS. 1 and 2 , the number of positioning members 122 is multiple, the number of mounting grooves 123 is multiple, and each mounting groove 123 in the multiple mounting grooves 123 is arranged in the multiple positioning members 122 between two adjacent positioning members 122 .

In this embodiment, the number of positioning members 122 is multiple, and the number of positioning members 122 is less than or equal to the number of stator slots 112 . When the number of the positioning members 122 is equal to the number of the stator slots 112 , each stator slot 112 accommodates one positioning member 122 . When the number of the positioning members 122 is smaller than that of the stator slots 112, it should be ensured that the positioning members 122 are evenly distributed on the stator iron core 110 and located in the positioning grooves, so that the force exerted by the stopper 120 on the stator iron core 110 as a whole can be increased. Evenly, it avoids the impact on the performance of the motor 200 caused by the concentration of force on a certain part of the stator core 110 . The number of the assembling slots 123 is multiple, and one assembling slot 123 is provided between the two positioning pieces 122 . For the stopper body 121 , the connecting piece passing through the assembling slot 123 to connect the stopper body 121 and the stator winding 130 140 , the connecting member 140 can provide a first-direction acting force to the stopper body 121 . The positioning member 122 matched with the slot of the stator slot 112 can provide the stopper body 121 with a force in a second direction opposite to the first direction, that is, when the positioning member 122 cooperates with the groove, the force in both directions is uniform. Therefore, the stopper 120 can be better fixed with the stator iron core 110 and the stator winding 130 .

Embodiment 3

According to a second aspect of the present application, a motor 200 is provided, including the stator assembly 100 provided by any of the above designs.

The motor 200 provided by the present application includes the stator assembly 100 provided by any of the above designs, and therefore has all the beneficial effects of the stator assembly 100, and details are not described herein again.

Further, as shown in FIG. 3 , the motor 200 further includes a rotor assembly 210 . The rotor assembly 210 is disposed in the installation opening 111 of the stator assembly 100 , and the rotor assembly 210 can rotate relative to the stator assembly 100 .

Further, as shown in FIG. 3 , the rotor assembly 210 includes a rotor iron core 211 , an oil baffle 212 and a balance weight 213 . The rotor iron core 211 is located in the installation opening 111 , and the oil baffle 212 is disposed on the axial end surface of the rotor iron core 211 close to the stopper 120 . The balance weight 213 is provided on the axial end face of the rotor core 211 .

In this embodiment, the oil baffle 212 is disposed on the axial end surface of the rotor iron core 211 close to the stopper 120 , and the oil baffle 212 can effectively block the oil-air mixture and prevent a large area of the oil-air mixture from flowing to the rotor assembly 210 The axial end face of the compressor 300 causes a sharp increase in the oil output of the compressor 300. The balance weight 213 is arranged on the axial end surface of the rotor iron core 211 , and the balance weight 213 can reduce windage loss and noise. Specifically, the balance weights 213 are provided at both axial ends of the rotor core 211 .

Further, the number of stator windings 130 is at least three, and the connection ends of the three stator windings 130 are distributed on the axial end face of the motor 200 after the sprinkler. The motor 200 further includes at least three lead wires, at least three lead wires. One end of each lead wire is connected to a connection end of a stator winding 130 , and the other end of the lead wire is used to connect with a connection terminal of the compressor 300 .

In this embodiment, the motor 200 includes a stator core 110, at least three stator windings 130, and at least three lead wires. Specifically, the stator core 110 is made by laminating a plurality of stator punching sheets. It is worth noting that the stator punching sheet can be made of silicon steel sheet with low iron loss and high magnetic induction. The stator winding 130 is provided on the stator core 110 . The number of stator windings 130 is at least three, which is specifically selected according to different types of motors 200 . Specifically, when the motor 200 is a three-phase motor 200 , the number of stator windings 130 is three. Each of the stator windings 130 has a connection end, and the connection end is used for electrical connection with the lead wire, so as to realize current passing through the stator winding 130 . It should be noted that when a stator winding 130 is formed by winding a copper wire, the connection end of the stator winding 130 is a free end of a copper wire. If a stator winding 130 is formed by winding two copper wires, the connection end of the stator winding 130 is the free end of the two copper wires. Specifically, when the number of stator windings 130 is three, the three stator windings 130 are sequentially nested on the stator iron core 110 along the radial direction of the stator iron core 110 . Specifically, each stator winding 130 is wound on the stator core 110 in the circumferential direction of the stator core 110. Further, the number of the connection ends of the at least three stator windings 130 is at least three, and the at least three connection ends are distributed on the axial end face of the motor 200 . It is worth noting that "scattered" means that the at least three connection ends are scattered and arranged at various places on the axial end face of the motor 200, and the at least three connection ends are not arranged centrally. The motor 200 also includes lead wires, and the number of the lead wires corresponds to the number of the stator windings 130 one-to-one, that is, one lead wire corresponds to one stator winding 130 . For one lead wire, one end of the lead wire is connected to the stator winding 130 . For electrical connection, the other end of the lead wire can be connected to the connection terminal of the compressor 300 . In the present application, by dispersing the connection ends of at least three stator windings 130, the at least three lead wires connected between the connection terminals and the connection ends can better disperse the stress, that is, each lead wire can be connected to the stator. The axial end face of the iron core 110 forms an included angle, and the connection parts scattered in various places can make the included angle formed by different lead wires unequal, so that the connection position of the lead wires can be easily installed, and the wiring difficulty of the lead wires can be effectively improved. , to improve the assembly efficiency of the compressor 300 .

It should be noted that the connection end of the stator winding 130 and the extension line of the connection terminal in the axial direction do not overlap.

Embodiment 4

According to a third aspect of the present application, as shown in FIG. 4 , a compressor 300 is provided, including the motor 200 provided by any of the above designs.

The compressor 300 provided in the present application includes the motor 200 provided by any of the above designs, and therefore has all the beneficial effects of the motor 200, which will not be repeated here.

The stator assembly 100 provided by the present application includes a stator iron core 110 and a stopper 120. The stator iron core 110 is formed by stacking a plurality of stator punching sheets, and the stator punching sheets are made of silicon steel material. Among them, silicon steel refers to silicon alloy steel with a silicon content of 1.0% to 4.5% and a carbon content of less than 0.08%. Silicon steel has the characteristics of high permeability, low coercivity, and large resistivity, so hysteresis loss and eddy current loss are relatively small. The stator core 110 has an axially penetrating installation opening 111 , and the installation opening 111 is used for assembling the rotor assembly 210 of the motor 200 , and the rotor assembly 210 can rotate relative to the stator assembly 100 . During the high-speed rotation of the rotor assembly 210 of the motor 200, the rotor assembly 210 drives the oil-air mixture formed by the lubricating oil and the refrigerant to flow along the axial direction. When the oil-air mixture flows to the end of the rotor assembly 210, during the high-speed rotation Under the action of the generated centrifugal force, the oil and gas mixture will be thrown around. In the present application, a stopper 120 is provided at the axial end of the stator core 110, so that the thrown out oil and gas mixture can be stopped, and the oil and gas can be reduced as much as possible. The mixture is thrown onto the casing 310 of the compressor 300 with the motor 200, thereby preventing the oil-air mixture from being discharged to the outside through the exhaust port on the casing 310, thereby greatly reducing the oil output of the compressor 300, thereby improving the compressor 300. 300 reliability and energy efficiency of the compressor 300, specifically, the oil-air mixture blocked by the stopper 120 will flow back into the oil sump of the compressor 300 through the gap between the stator assembly 100 and the rotor assembly 210, thereby avoiding The compressor 300 is short of oil. When the compressor 300 is short of oil, the mechanical parts will rub violently, which will increase the reliability risk of the compressor 300. At the same time, the loss between the mechanical parts will also increase, and the torque will also increase, which will directly lead to The energy efficiency of the compressor 300 decreases. As shown in FIGS. 5 and 6 , compared with the related art, the compressor 300 using the above stator assembly 100 reduces the oil output of the compressor 300 from 3.6% to 1.1%. However, the energy efficiency of the compressor 300 is increased from 210% to 221.3%, that is to say, the oil output of the compressor with the stator assembly 100 is significantly reduced, and the energy efficiency is significantly improved.

Further, as shown in FIG. 4 , the compressor 300 includes a compression part 320 , the compression part 320 is disposed on an axial side of the motor 200 , and the stopper 120 is located on the side of the stator core 110 away from the compression part 320 . The compressor 300 includes a casing 310, a cavity 311 is formed in the casing 310, the compression part 320 and the motor 200 are both disposed in the casing 310, and the casing 310 can protect the compression part 320 and the motor 200 from external interference. Specifically, the compressor 300 is a rotary compressor 300 or a scroll compressor 300 . Further, the compression part 320 includes a cylinder 322 and a piston 323. The piston 323 is arranged in a compression chamber in the cylinder 322. The motor 200 further includes a crankshaft 220 that moves synchronously with the rotor assembly 210. The crankshaft 220 drives the piston 323 to eccentrically move in the cylinder 322. sports. Further, the compression part 320 further includes a main bearing 321 and an auxiliary bearing 324 , the main bearing 321 is sleeved on the crankshaft 220 close to the motor 200 , and the auxiliary bearing 324 is sleeved on the crankshaft 220 away from the motor 200 .

In this application, the term "plurality" refers to two or more, unless expressly defined otherwise. The terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be It is directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in this application at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or instance. 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 descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

A stator assembly for a motor, wherein the stator assembly includes:

a stator iron core, the stator iron core has an installation port penetrating in the axial direction, and the installation port is used for assembling the rotor assembly of the motor;

A stopper is provided at the axial end of the stator iron core.
The stator assembly of claim 1 wherein,

The stopper extends in an axial direction away from the stator core.
The stator assembly of claim 1 wherein,

The stopper is arranged on the stator iron core around the center line of the stator iron core.
The stator assembly of claim 3, wherein,

The inner diameter of the stopper is greater than or equal to the inner diameter of the stator core.
The stator assembly of claim 1 wherein,

the stopper is an insulating part;

The stopper is a one-piece structure.
The stator assembly of any one of claims 1 to 5, wherein,

The stator assembly also includes:

a plurality of stator slots, which are evenly arranged on the stator iron core, and each of the stator slots communicates with the installation port;

The stopper includes:

a stop body, arranged at the axial end of the stator iron core;

At least one positioning piece is arranged on the wall surface of the stopper body close to the stator iron core, and the positioning piece extends into the notch of the stator slot.
The stator assembly of claim 6, wherein,

The circumferential width of the positioning member is greater than or equal to the slot width of the stator slot.
The stator assembly of claim 6, wherein,

The stopper also includes:

an assembling groove, which is arranged on the wall surface of the stopper body close to the stator iron core, avoiding the positioning piece;

The stator assembly also includes:

a stator winding, passing through the stator slots and arranged on the stator iron core;

A connecting piece passes through the fitting slot to fix the stator winding and the stopper body.
The stator assembly of claim 8, wherein,

The number of the positioning members is multiple, the number of the mounting grooves is multiple, and each mounting groove in the multiple mounting grooves is arranged between two adjacent positioning members in the multiple positioning members .
A motor comprising:

The stator assembly of any one of claims 1 to 9; and

A rotor assembly is provided in the mounting opening of the stator assembly, and the rotor assembly is rotatable relative to the stator assembly.
The electric machine of claim 10, wherein the rotor assembly comprises:

rotor core;

an oil baffle, arranged on the axial end face of the rotor core close to the stopper;

The balance weight is arranged on the axial end face of the rotor iron core.
A compressor comprising: the motor of claim 10 or 11.