Stator structure, motor, compressor

Abstract

The application provides a stator structure, a motor and a compressor, wherein the stator structure comprises: a centering iron core, the stator iron core comprises a plurality of laminated first punching sheets, one end of the stator iron core is provided with a second punching sheet, the second punching sheet is provided with a plurality of protruding portions, the protruding portions protrude out of the first punching sheets, and the protruding portions are provided with a plurality of flow-through holes. According to the application, the technical problem that the middle part of the compressor in the prior art is not provided with an oil blocking structure, the oil-gas separation effect is poor, and the oil discharge rate of the compressor is high can be solved.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to a stator structure, a motor, and a compressor. Background Technology

[0002] Currently, variable frequency scroll compressors are trending towards smaller size and higher speed, with the operating frequency range expanding from the traditional 130Hz to 160Hz, and potentially even higher in the future. This results in an increase in the amount of high-pressure gas and lubricating oil mixture (referred to as oil-gas mixture) discharged from the pump body's compression exhaust chamber per unit time. To improve compressor energy efficiency, how to efficiently separate the oil-gas mixture and reduce the amount of lubricating oil discharged from the compressor with the high-pressure refrigerant is an important technical issue in this field.

[0003] Traditional techniques or structures involve adding an oil baffle plate to the lower support or auxiliary bearing of the scroll compressor's internal cavity. While this method can partially shield the oil in the oil sump at the bottom of the scroll compressor, achieving a stable oil level, the oil-gas mixture in the middle of the compressor flows even faster during high-speed operation. Without an oil baffle structure, the lubricating oil cannot be efficiently separated, and a large portion is directly discharged from the exhaust pipe in the middle of the compressor. This results in an increase in the amount of lubricating oil entering the air conditioning system. Excessive oil reduces the heat exchange efficiency of the air conditioning heat exchanger, lowering the air conditioning's operating capacity, especially during high-frequency nominal cooling and heating operations. Furthermore, reduced lubricating oil in the compressor cavity also negatively impacts the compressor's reliability.

[0004] Because existing compressors lack an oil baffle structure in the middle, resulting in poor oil-gas separation and high oil discharge rate, this invention researches and designs a stator structure, motor, and compressor. Summary of the Invention

[0005] Therefore, the present invention provides a stator structure, a motor, and a compressor that can solve the technical problem in the prior art where the compressor lacks an oil baffle structure in the middle, resulting in poor oil-gas separation and a high oil discharge rate.

[0006] To address the aforementioned problems, the present invention provides a stator structure comprising: a stator core, the stator core including a plurality of stacked first laminations, a second lamination being provided at one end of the stator core, the second lamination having a plurality of protrusions extending beyond the first laminations, and the protrusions having a plurality of flow holes.

[0007] In some embodiments, a plurality of flow grooves are provided on the outer peripheral wall of the first lamination along the circumferential direction, and the flow grooves penetrate the first lamination along the axial direction, and the flow grooves are arranged opposite to the protrusion.

[0008] In some embodiments, the outer diameter of the second lamination is larger than the outer diameter of the first lamination, and the protrusion is located at the portion of the second lamination that extends beyond the first lamination.

[0009] In some embodiments, the third lamination is provided at the other end of the stator core. The third lamination has multiple protrusions that extend beyond the first lamination. The protrusions are provided with multiple first through holes that are staggered from the first through holes.

[0010] In some embodiments, the third lamination is provided at the other end of the stator core. The third lamination has multiple protrusions that extend beyond the first lamination and are staggered from each other.

[0011] In some embodiments, the stack thickness of the first lamination is 1 to 3 mm.

[0012] The present invention also provides an electric motor comprising the aforementioned stator structure.

[0013] In some embodiments, the motor includes a lead wire assembly, the second lamination is located at one end of the stator core facing the lead wire assembly, and a plurality of second laminations are stacked on the stator core at the end facing the lead wire assembly.

[0014] The present invention also provides a compressor that includes the aforementioned motor.

[0015] In some embodiments, the compressor includes a housing, and the second lamination is interference-fitted with the inner wall of the housing.

[0016] The stator structure, motor, and compressor provided by this invention have the following beneficial effects:

[0017] The stator structure is mounted on the compressor. The second lamination has multiple protrusions that extend beyond the first lamination. The protrusions are provided with multiple flow holes. When the oil-gas mixture flows in the compressor, the protrusions and the first lamination can effectively separate the high-speed oil-gas mixture in the middle, thereby reducing the amount of lubricating oil discharged from the compressor and lowering the oil discharge rate. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the stator structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a view of one end of the stator structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the first lamination in the stator structure of the present invention;

[0022] Figure 4 This is a view of the stator structure of the present invention from another end;

[0023] Figure 5 This is a top view of the stator structure according to another embodiment of the present invention. Figure 1 ;

[0024] Figure 6 This is a schematic diagram of the structure of the second lamination in the stator structure of the present invention. Figure 2 ;

[0025] Figure 7 This is a schematic diagram of the stator structure of the present invention. Figure 2 ;

[0026] Figure 8 The assembly of the stator structure of the present invention Figure 1 ;

[0027] Figure 9 This is an exploded view of the stator structure of the present invention;

[0028] Figure 10 The assembly of the stator structure of the present invention Figure 2 .

[0029] The attached figures are labeled as follows:

[0030] 1. Stator core; 2. Insulation frame assembly; 21. First insulation frame; 22. Second insulation frame; 3. Winding wire; 4. Lead wire assembly; 5. Tooth; 6. Yoke; 7. Winding wire slot; 8. Flow slot; 9. Flow hole; 101. First lamination; 102. Second lamination; 103. Third lamination; 12. Protrusion. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0035] See also Figure 1-10As shown, according to an embodiment of the present invention, a stator structure is provided, comprising: a stator core 1, the stator core 1 including a plurality of stacked first laminations 101, a second lamination 102 disposed at one end of the stator core 1, the second lamination 102 having a plurality of protrusions 12 extending beyond the first laminations 101, and the protrusions 12 having a plurality of flow holes 9. In this technical solution, the stator structure is installed in a compressor. By having a plurality of protrusions 12 on the second lamination 102, extending beyond the first laminations 101, and having a plurality of flow holes 9, when the oil-gas mixture flows in the compressor, the protrusions 12 and the first laminations 101 can effectively separate the high-speed oil-gas mixture in the middle, thereby reducing the amount of lubricating oil discharged from the compressor and lowering the oil discharge rate. Preferably, the plurality of protrusions 12 are arranged sequentially along the circumference of the second laminations 102, and the number of protrusions 12 can be 5 or 8; of course, other numbers are also acceptable.

[0036] In some embodiments, a plurality of flow grooves 8 are provided on the outer peripheral wall of the first lamination 101 along the circumferential direction. The flow grooves 8 penetrate the first lamination 101 along its axial direction, and are arranged opposite to the protrusion 12. In this technical solution, the flow grooves 8 form on the outer peripheral wall of the stator core 1 along its axial direction. After the lubricating oil and airflow in the compressor oil sump are mixed, the oil-air mixture flows along the flow grooves 8. When it reaches the second lamination 102, oil-air separation is achieved using the protrusion 12 and the first lamination 101.

[0037] In some embodiments, the outer diameter of the second lamination 102 is larger than the outer diameter of the first lamination 101, and the protrusion 12 is located at the portion of the second lamination 102 that extends beyond the first lamination 101. In this technical solution, the protrusion 12 has a protruding area relative to the outer contour of the first lamination 101, and the protrusion is provided with 3 to 10 circular flow holes 9, or a combination of circular and semi-circular holes. The larger outer diameter of the second lamination 102 compared to the first lamination 101, and the location of the protrusion 12 at the portion of the second lamination 102 extending beyond the first lamination 101, significantly increases the oil-blocking area of ​​the second lamination 102, thereby improving the oil-gas separation efficiency.

[0038] In some embodiments, the other end of the stator core 1 is provided with the third lamination 103. The third lamination 103 has multiple protrusions that extend beyond the first lamination 101. Each protrusion has multiple first through holes, and the flow hole 9 is staggered with the first through holes. In this technical solution, the third lamination 103 has the same structure as the second lamination 102. The flow hole 9 is staggered with the first through holes. After the oil-gas mixture enters the flow groove 8 after the third lamination 103, it continues to flow and collides with the second lamination 102, undergoing oil-gas separation again, thus improving the oil-gas separation effect.

[0039] In some embodiments, the other end of the stator core 1 is provided with the third lamination 103, which has multiple protrusions extending beyond the first lamination 101. The protruding portion 12 is offset from the protrusions. In this technical solution, the third lamination 103 has the same structure as the second lamination 102. The protruding portion 12 is offset from the protrusions. After the oil-gas mixture enters the flow channel 8 after the third lamination 103, it continues to flow and collides with the second lamination 102, undergoing another oil-gas separation process, thus improving the oil-gas separation effect.

[0040] In some embodiments, the stacking thickness of the first lamination 101 is 1-3 mm. In this technical solution, if the stacking thickness of the first lamination 101 is too small, the mechanical strength is insufficient; if it is too large, the oil blocking path is too long. The stacking thickness of the first lamination 101 is 1-3 mm, which increases the gas flow resistance.

[0041] The present invention also provides an electric motor, including the stator structure described above.

[0042] The motor of this invention is a permanent magnet motor. The stator body of the motor consists of a stator core 1, an insulating frame 2, winding wires 3, and a lead wire assembly 4. The stator core 1 is formed by stacking multiple stator laminations, each lamination containing teeth 5, yokes 6, winding slots 7, flow grooves 8, and / or flow holes 9. The insulating frame 2 consists of a first insulating frame 21 and a second insulating frame 22, which are respectively inserted into both ends of the stator core 1. The winding wires 3 are electrical conductors made of copper or aluminum enameled wire, wound using specialized equipment within the space defined by the stator winding slots 7 and the insulating frame 2. The insulating frame 2 provides support and insulation between the windings and the stator core 1. The lead wire assembly 4 serves as a bridge connecting the winding wires and the external socket of the motor, and is fixed to one axial end of the motor surface. Furthermore, the stator body of the motor of the present invention may also be without an insulating frame assembly, the winding wires are embedded into the stator winding slots by special machinery and equipment, there is no support structure between the windings and the stator core, and the rest of the structure is the same as the aforementioned structure.

[0043] In some embodiments, the motor includes a lead wire assembly 4, the second lamination 102 is located at one end of the stator core 1 facing the lead wire assembly 4, and a plurality of second laminations 102 are stacked at the end of the stator core 1 facing the lead wire assembly 4.

[0044] Preferably, multiple second laminations 102 can be stacked at both ends of the stator core 1, with a stacking and fastening thickness of 1 to 3 mm.

[0045] The present invention also provides a compressor including the stator structure described above.

[0046] The compressor of this invention is preferably a scroll compressor. This invention solves the problem that when a scroll compressor operates at high speed, the high-speed flow of oil and gas in the middle of the compressor cavity leads to insufficient oil-gas separation, resulting in a high oil discharge rate and indirectly reducing the compressor's capacity and energy efficiency. It also simultaneously solves the design and layout problems of the motor core flow groove and flow hole. Preferably, the outer peripheral walls of the second lamination 102 and the third lamination 103 are provided with notches, and the oil return pipe inside the compressor is installed at these notches, connecting to the lower chamber of the compressor and the oil sump level.

[0047] In some embodiments, the compressor includes a housing, and the second lamination 102 is interference-fitted with the inner wall of the housing. The interference fit between the second lamination 102 and the inner wall of the housing ensures that the oil-gas mixture is completely separated by the second lamination, thus improving the oil-gas separation efficiency of the compressor.

[0048] The compressor of this invention solves the problem of how to better and more efficiently separate oil-gas mixtures under high-speed operation of variable frequency scroll compressors, thereby reducing the amount of lubricating oil discharged into the air conditioning piping system, improving the heat exchange effect of the two heat exchangers, and ensuring the lubrication of the scroll compressor body components to guarantee its reliability under various operating conditions.

[0049] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A stator structure, characterized in that: include: A stator core (1) includes multiple stacked first laminations (101). A second lamination (102) is provided at one end of the stator core (1). The second lamination (102) has multiple protrusions (12). The protrusions (12) extend beyond the first laminations (101). The protrusions (12) are provided with multiple flow holes (9). Along the circumference of the first laminations (101), multiple flow grooves (8) are provided on the outer peripheral wall of the first laminations (101). Along the axial direction of the first laminations (101), the flow grooves (8) penetrate the first laminations (101). The flow grooves (8) are arranged opposite to the protrusions (12). The outer diameter of the second lamination (102) is larger than that of the first lamination (101). The protrusion (12) is located at the part of the second lamination (102) that extends out of the first lamination (101). The other end of the stator core (1) is provided with a third lamination (103). The third lamination (103) has multiple protrusions that extend out of the first lamination (101). The protrusions have multiple first through holes. The flow hole (9) is staggered with the first through hole. After the oil-gas mixture enters the flow groove (8) after the third lamination (103), it continues to flow and collides with the second lamination (102), and oil-gas separation occurs again.

2. The stator structure according to claim 1, characterized in that: The protrusion (12) is misaligned with the protrusion.

3. The stator structure according to claim 1, characterized in that: The first lamination (101) has a stacking thickness of 1 to 3 mm.

4. An electric motor, characterized in that, The stator structure includes any one of claims 1 to 3.

5. The motor according to claim 4, characterized in that: The motor includes a lead wire assembly (4), the second lamination (102) is located at one end of the stator core (1) facing the lead wire assembly (4), and a plurality of second laminations (102) are stacked at one end of the stator core (1) facing the lead wire assembly (4).

6. A compressor, characterized in that, The stator structure includes any one of claims 1 to 3.

7. The compressor according to claim 6, characterized in that: The compressor includes a housing, and the second lamination (102) is interference-fitted with the inner wall of the housing.

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