A motor stator assembly, a motor and a compressor

Abstract

The utility model provides a kind of motor stator assembly, motor and compressor, it is applied to motor component technical field, the motor stator assembly includes stator core, upper insulating support being set on the upper end of stator core and oil baffle, upper insulating support includes inner wall, and first installation part is arranged on inner wall;Oil baffle is statically set on the upper end face of motor rotor assembly, and its circumferential outside is provided with second installation part;First installation part is connected with second installation part, to fix oil baffle on the inner wall of upper insulating support, the utility model can solve the problem that the variety of parts is numerous due to the coupling of oil baffle and rotor assembly by above-mentioned scheme, realizes the standardization of oil baffle.

Description

Technical Field

[0001] This utility model relates to the technical field of compressor motor components, and in particular to a motor stator assembly, a motor, and a compressor. Background Technology

[0002] In equipment such as rotary compressors, the electric motor is the driving component. When the motor runs, it agitates the lubricating oil at the bottom of the casing, forming an oil mist. To prevent excessive liquid lubricating oil from being discharged from the compressor with the refrigerant gas and affecting the efficiency of the downstream heat exchanger, an oil baffle is usually installed at the top of the motor.

[0003] The existing technical solution is to integrate the oil baffle as part of the motor rotor assembly, fixing it to the rotor or integrating it with the upper balance block. The purpose of this design is to use the centrifugal force generated by the oil baffle rotating with the rotor to separate oil droplets.

[0004] However, to achieve dynamic balance, motor rotors require upper balancing blocks of varying heights and masses depending on their specifications. Due to the structural coupling between the oil baffle and the upper balancing block, each type of upper balancing block requires a specific oil baffle at a particular installation height. This results in low standardization of components, preventing the oil baffle from becoming a universal part. For example, in a certain series of 8-pole 12-slot inverter motors, at least nine different types of oil baffles need to be developed simply because of the varying heights of the upper balancing blocks, increasing the variety of components. Simultaneously, manufacturing and management costs are high. Each type of oil baffle requires the development of an independent injection mold, leading to high mold development and maintenance costs. The large variety of components adds complexity to inventory management, production planning, and supply chain coordination. Furthermore, the development cycle is extended, and design is constrained. When developing new motor models, the matching of the oil baffle and balancing block becomes a repetitive verification process, extending the prototyping cycle. When optimizing the design of the balancing block, structural compatibility with the oil baffle must be considered, limiting design freedom.

[0005] Existing technologies primarily focus on improving the performance of oil baffles or addressing electrical safety issues. Even when some solutions attempt to connect relevant components to the stator side, they often do so by connecting them to the outer periphery of the insulating support. This not only fails to effectively solve the coupling problem with the rotor assembly but may also lead to an increase in the overall radial dimension. Therefore, no effective technical solution has yet been proposed in this field that can fundamentally solve the component standardization problem caused by structural coupling by optimizing the connection position and structure.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] In view of this, the present invention provides a motor stator assembly, which aims to achieve structural decoupling between the oil baffle and the motor rotor assembly by innovatively fixing the oil baffle to the inner wall of the upper insulating bracket. This solves the problems of numerous oil baffle parts, low standardization, and high mold and inventory costs caused by such coupling relationship in the prior art.

[0008] This utility model embodiment provides a motor stator assembly, including a stator core, an upper insulating bracket, and an oil baffle plate. The upper insulating bracket is disposed at the upper end of the stator core. Its characteristic is that:

[0009] The upper insulating bracket includes an annular outer wall and an inner wall, and a first mounting part is provided on the inner wall;

[0010] An oil baffle is positioned on the upper end face of the motor rotor assembly. A second mounting part is provided on the oil baffle in the circumferential direction facing the upper insulating bracket. The first mounting part and the second mounting part are connected in cooperation.

[0011] In some alternative embodiments, the second mounting portion is a protrusion disposed on the outer periphery of the oil baffle, and the first mounting portion is a groove that engages with the protrusion through an interference fit.

[0012] In some alternative embodiments, the diameter of the outer peripheral wall of the baffle is smaller than the inner diameter of the inner wall.

[0013] In some alternative embodiments, the oil baffle has a rotor receiving recess facing the rotor assembly of the motor.

[0014] In some alternative embodiments, the axial depth of the rotor receiving recess is in the range of 0 mm to 10 mm.

[0015] In some alternative embodiments, the central region of the oil baffle is provided with a shaft clearance hole to accommodate the rotor assembly shaft.

[0016] In some alternative embodiments, the end of the shaft clearance hole opposite to the stator core is provided with a flange, the axial depth of which is in the range of 0 mm to 10 mm.

[0017] In some optional embodiments, the oil baffle is provided with oil flow holes.

[0018] This utility model provides a compressor motor, including a motor stator assembly as described above, and a motor rotor assembly installed within the stator assembly.

[0019] This utility model embodiment provides a compressor, including the compressor motor as described above.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention.

[0021] The present invention discloses a motor stator assembly, a motor, and a compressor. Compared with the prior art, by innovatively fixing the oil baffle to the inner wall of the upper insulating bracket, it has at least the following beneficial effects:

[0022] Achieving a high degree of standardization and significantly reducing costs: By decoupling the oil baffle from the dynamic rotor assembly and placing its connection point on the inner wall of a structurally uniform static component, namely the upper insulating support, the structural coupling between the oil baffle and dynamic components with varying specifications, such as the upper balance block, is completely severed. This makes the oil baffle no longer subject to changes in the balance block height, allowing it to be used as a standard part in motors of different specifications, thereby significantly reducing the number of parts and directly lowering the costs of mold development, inventory management, and supply chain coordination.

[0023] Generates collaborative design benefits and improves R&D efficiency: Due to the complete structural decoupling mentioned above, the design of the upper balance block is no longer constrained by the oil baffle structure, making its design more free and simplified, resulting in collaborative technological advancements that cannot be foreseen in existing technologies, and shortening the R&D cycle of new products.

[0024] The structure is reliable and the layout is compact: the oil baffle is fixed to the inner wall of the static upper insulating bracket, and the working environment is far superior to that of a rotor that is fixed at high speed and under severe vibration, ensuring the long-term reliability of the connection. At the same time, compared with the possible solution of connecting to the outer wall, the layout of connecting to the inner wall makes the radial dimension of the entire stator assembly more compact, which is conducive to the overall miniaturization design of the compressor. Attached Figure Description

[0025] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of a motor stator assembly according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a motor stator assembly according to another embodiment of the present invention.

[0028] Among them, 110-upper insulating bracket, 111-first mounting part, 120-oil baffle, 121-rotor receiving recess, 122-shaft clearance hole, 123-oil flow hole, 124-second mounting part, and 200-rotor assembly and balance block. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The words “or” and “or” in the specification may mean “and” or “or”.

[0030] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0031] In the present application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0032] During the operation of a rotary compressor motor, lubricating oil is agitated, forming an oil mist. To prevent excessive liquid lubricating oil from being discharged with the refrigerant and affecting system efficiency, an oil baffle is required. In existing technologies, the oil baffle is usually integrated with the motor rotor assembly. This structure limits the design and specifications of the oil baffle to the rotor assembly, particularly the height of the upper balance block, making standardization difficult. Centrifugal force is the basic principle for separating oil droplets in a rotary oil baffle, using high-speed rotation to generate centrifugal force that throws the oil droplets outward. However, this method requires high speed and structural design. This invention aims to solve the aforementioned standardization problem. Its technical solution is to separate the oil baffle from the dynamic rotor assembly and fix it to the static stator assembly. More specifically, this invention innovatively achieves a stable connection between the oil baffle and the inner wall of the upper insulation support by providing a first mounting part on the inner wall of the upper insulation support and a matching second mounting part on the outer periphery of the oil baffle. This "inner wall connection" structural layout not only frees the design of the oil baffle from the constraints of the rotor assembly, fundamentally breaking the original structural coupling and making it possible to standardize the design of the oil baffle, thereby reducing the types of parts and manufacturing costs; at the same time, this layout also effectively encloses the oil baffle within the radial contour of the stator assembly, ensuring the compactness of the structure.

[0033] One embodiment of this utility model provides a motor stator assembly, combined with... Figure 1 and Figure 2As shown, the motor stator assembly includes: a stator core, an upper insulating bracket 110, and an oil baffle 120.

[0034] The upper insulating bracket 110 is statically disposed at the upper end of the stator core for supporting and fixing the stator core and the coil windings. The upper insulating bracket 110 is made of an insulating material, such as thermoplastic. According to the technical solution of this utility model, the upper insulating bracket 110 includes an annular outer wall and an annular inner wall. The inner wall has sufficient structural strength and is used to mount the oil baffle 120. A first mounting portion 111 for connection is pre-set on the inner wall.

[0035] The oil baffle 120 is configured to be statically mounted on the upper surface of the motor rotor assembly 200 in use, and its material may be an engineering plastic with good oil resistance. A second mounting portion 124 is correspondingly provided on the outer circumferential side of the oil baffle 120 for cooperating with the first mounting portion 111.

[0036] In this embodiment, the first mounting part 111 and the second mounting part 124 cooperate to connect with each other, thereby firmly fixing the oil baffle 120 to the inner wall of the upper insulating bracket 110. This connection can be achieved through various specific structures, such as snap-fit, screw connection, or adhesive connection.

[0037] With the above structure, the upper insulating bracket 110, as a component of the motor stator, provides support and insulation for the stator core and windings. The oil baffle 120 is fixed to the inner wall of the upper insulating bracket 110 via the first mounting part 111 and the second mounting part 124, and is statically positioned above the upper end face of the motor rotor assembly 200, effectively blocking oil mist. This "inner wall connection" structural layout separates the oil baffle 120 from the dynamic and variable-specification rotor assembly 200, achieving structural decoupling and thus solving the component standardization problem caused by structural coupling in the prior art.

[0038] In one specific embodiment, the specific structures of the first mounting part 111 and the second mounting part 124 are as follows:

[0039] The second mounting portion 124 is manifested as multiple protrusions integrally formed on the outer peripheral wall of the oil baffle 120. In this embodiment, four protrusions are evenly distributed circumferentially, and their cross-sections are semi-circular with a radius of 0.5 mm.

[0040] Correspondingly, the first mounting portion 111 is manifested as a plurality of grooves formed on the inner wall of the upper insulating bracket 110. The number, position, and shape of the grooves are matched one-to-one with the protrusions. In this embodiment, four semi-circular grooves are correspondingly provided, and their radii are set to be slightly smaller than the radius of the protrusions, for example, 0.45 mm.

[0041] By designing the radius of the groove to be smaller than the radius of the protrusion, an interference fit is formed between the two. During assembly, when the oil baffle 120 is pressed into the upper insulating bracket 110, the protrusion undergoes elastic deformation due to pressure and is forced into the groove. After the two engage, the radial clamping force generated by the elastic restoring force of the material achieves a stable fixed connection. To ensure sufficient engagement area, the axial length of both the protrusion and the groove can be set to 3 mm.

[0042] By adopting the above-mentioned structure of interference fit between protrusion and groove, this embodiment can achieve quick, convenient and reliable fixation between oil baffle 120 and upper insulating bracket 110 without the need for additional fasteners, thereby simplifying the assembly process and reducing production costs.

[0043] In one specific embodiment, the overall profile of the oil baffle 120 is designed to be fully accommodated within the cavity of the upper insulating support 110.

[0044] Specifically, the maximum diameter of the outer peripheral wall of the oil baffle 120 is set to be smaller than the minimum inner diameter of the inner wall of the upper insulating bracket 110.

[0045] The design of this dimensional relationship ensures that a predetermined assembly gap exists between the oil baffle 120 and the upper insulating bracket 110 during the installation process, thus providing the necessary space for the alignment and engagement of the first mounting part 111 and the second mounting part 124. At the same time, this also ensures that the finally fixed oil baffle 120 is completely within the radial contour of the upper insulating bracket, without causing radial interference.

[0046] In one specific implementation, when the motor stator assembly and motor rotor assembly are assembled in the compressor, and the highest point of the rotor assembly and balance block 200 is higher than the highest point of the upper insulating bracket 110, such as Figure 2 As shown, the structure of the oil baffle 120 is further designed such that a recessed area is formed on the body of the oil baffle 120 facing the motor rotor assembly and the balance block 200, which constitutes a rotor receiving recess 121. The rotor receiving recess 121 is composed of continuous sidewalls and a bottom surface, with the sidewalls connected to the body of the oil baffle 120 and the bottom surface facing the motor rotor assembly and the balance block 200. A height difference is formed between its bottom surface and the edge portion of the oil baffle 120. Specifically, the oil baffle 120 can be manufactured using a one-piece molding process, such as injection molding, in which the recess is directly manufactured. The presence of the rotor receiving recess 121 gives the oil baffle 120 an overall "bowl-shaped" or "disc-shaped" form, rather than a completely flat structure. This recessed design allows the motor rotor assembly and the balance block 200 to be accommodated at a certain height below the oil baffle 120, thereby avoiding physical interference between the oil baffle 120 and the rotor assembly and the balance block 200.

[0047] In one implementation, the sidewalls of the rotor receiving recess 121 may be inclined, curved, or stepped to facilitate the return of lubricating oil and reduce airflow resistance. The material constituting the rotor receiving recess 121 is the same as the material of the oil baffle 120 body, for example, it may be an engineering plastic such as polybutylene terephthalate (PBT) filled with glass fiber, or other polymeric materials with sufficient strength and oil resistance.

[0048] In some other alternative embodiments, the rotor receiving recess 121 may be circular, square, polygonal, or irregular in shape to accommodate rotor assemblies and counterweights 200 of different shapes. The bottom surface of the rotor receiving recess 121 may have different textures or coatings, such as a rough surface or an oleophobic coating, to promote the accumulation and return of lubricating oil.

[0049] Through the above solution, this embodiment can provide additional axial space for motor rotor assemblies and balance blocks 200 of different specifications, accommodate motor rotor assemblies and balance blocks 200 of higher dimensions, avoid interference between oil baffle 120 and rotor assembly and balance block 200, thereby improving the versatility and compatibility of oil baffle 120, so that the same oil baffle 120 can be applied to motors of different specifications without the need to design oil baffle 120 separately for each type of motor, thereby simplifying the product line and reducing production and inventory costs.

[0050] In one specific embodiment, the axial depth H1 of the rotor receiving recess 121 is set to a range of 0 mm to 10 mm. For example, for a D-series variable frequency compressor, if the highest point of its motor rotor assembly and balance block 200 exceeds the mounting plane of the upper insulating bracket 110 by 9.5 mm, then the axial depth H1 of the rotor receiving recess 121 of the oil baffle 120 can be set to 9.5 mm to ensure that the rotor assembly and balance block 200 do not interfere with the oil baffle 120 during operation. As another example, for another D-series fixed frequency compressor, if the highest point of its motor rotor assembly and balance block 200 exceeds the mounting plane of the upper insulating bracket 110 by 3 mm, then the axial depth H1 of the rotor receiving recess 121 of the oil baffle 120 can be set to 3 mm. In some other optional embodiments, the axial depth H1 can be set to the maximum value in the series of compressors where the highest point of the upper balance block of the motor rotor assembly and balance block 200 exceeds the mounting plane of the upper insulating bracket 110, such as 10 mm, thereby achieving universality for all models in the series of compressors.

[0051] Through the above solution, this embodiment can ensure that the oil baffle 120 is compatible with rotor assemblies and balance blocks 200 of different heights, while achieving standardized design and production of the oil baffle 120.

[0052] In one specific implementation, to accommodate applications where some motor shafts are relatively long and their top ends are higher than the upper surface of the rotor assembly, the central area of ​​the oil baffle 120 is specially provided with a shaft clearance hole 122 to match the shaft of the rotor assembly.

[0053] like Figure 2 As shown, the shaft clearance hole 122 is a through hole that penetrates the oil baffle plate 120 axially. Its inner diameter is designed to be larger than the outer diameter of the shaft, thereby providing a space without interference for the shaft to pass through or be positioned, ensuring the normal operation of the motor rotor.

[0054] To further optimize its structure and function, as shown in a preferred embodiment, the shaft clearance hole 122 is integrally formed with a flange at the end opposite to the stator core (i.e., the side away from the motor rotor assembly). The flange extends upward along the edge of the shaft clearance hole 122, forming an annular cofferdam structure.

[0055] The flange has a dual function: on the one hand, it forms a groove to accommodate the top of the shaft, providing compatible space for shafts with different extension heights; on the other hand, it can effectively block lubricating oil that may flow from the upper surface of the oil baffle to the central hole, preventing oil from dripping directly onto the top of the shaft.

[0056] The axial depth of the flange, i.e., its axial height measured from the upper surface of the oil baffle, can be standardized according to the maximum extension of the shaft in the series of models. In this embodiment, the axial depth is set within a preferred range, namely 0 mm to 10 mm. When the depth is 0 mm, it indicates that no flange is provided, and it is a simple through hole; when the depth is greater than 0 mm, it forms a dike structure with specific protection and compatibility capabilities. By setting a maximum depth value (e.g., 10 mm) that can cover the requirements of all models, compatibility with all shafts can be achieved using a single specification of oil baffle.

[0057] In one specific implementation, such as Figure 2As shown, the oil baffle 120 is provided with a plurality of oil flow holes 123. These oil flow holes 123 penetrate the thickness direction of the oil baffle 120, allowing lubricating oil blocked by the oil baffle 120 to flow back to the bottom of the compressor. In one implementation, the flow holes are evenly distributed on the circumference of the oil baffle 120, i.e., on the sidewall of the rotor receiving recess 121. The cross-sectional shape of these oil flow holes 123 can be circular, for example, with a diameter of 2 mm. In another implementation, the cross-sectional shape of the oil flow holes 123 is elongated, with its length direction aligned with the radial direction of the oil baffle 120. Optionally, the width of the oil flow holes 123 is 1 mm and the length is 5 mm. In some other optional embodiments, the shape of the flow holes can also be triangular, elliptical, or irregular. The number of flow holes can also be adjusted according to actual needs, for example, 3, 5, 8, or more.

[0058] Through the above solution, the oil flow hole 123 in this embodiment can ensure that the lubricating oil blocked by the oil baffle 120 can flow back to the bottom of the compressor in a timely manner, avoid the lubricating oil from accumulating on the oil baffle 120, thereby maintaining the balance of lubricating oil inside the compressor and ensuring the normal operation of the compressor.

[0059] This utility model provides a compressor motor, which includes a motor stator assembly and a motor rotor assembly of any of the above embodiments.

[0060] The motor stator assembly includes an upper insulating bracket 110 and an oil baffle 120, wherein the oil baffle 120 is statically disposed on the upper end face of the motor rotor assembly and the balance block 200. The motor rotor assembly and the balance block 200 are disposed within the stator assembly. The motor rotor assembly and the balance block 200 include a rotor core, magnets, and an upper balance block. The rotor core is supported on the compressor housing by bearings and is driven to rotate by the electromagnetic force generated by the stator assembly. The magnets are mounted on the outer periphery of the rotor core and interact with the stator windings to generate a driving force. The upper balance block is used to balance the mass distribution of the rotor and reduce vibration.

[0061] In the above structure, the oil baffle 120 is fixed to the upper insulating bracket 110 by a snap-fit ​​structure, keeping it stationary relative to the rotor assembly and the balance block 200. The rotor receiving recess 121 and the shaft clearance hole 122 on the oil baffle 120 provide installation space for rotor assemblies, balance blocks 200, and shafts of different heights, improving compatibility. The oil flow hole 123 allows the lubricating oil blocked by the oil baffle 120 to flow smoothly back to the bottom of the compressor. This design decouples the oil baffle 120 from the rotor assembly and the balance block 200, freeing the design of the oil baffle 120 from the specifications of the rotor assembly and the balance block 200, thereby achieving standardization of the oil baffle 120, reducing manufacturing and management costs, and improving design flexibility.

[0062] Through the above solution, this embodiment achieves structural decoupling between the oil baffle 120 and the rotor assembly and balance block 200. This frees the design of the oil baffle 120 from the specifications of the rotor assembly and balance block 200, thereby achieving standardization of the oil baffle 120, reducing manufacturing and management costs, and improving design flexibility. Compared with the prior art, the beneficial effects of this embodiment are that it achieves a high degree of standardization of the oil baffle 120, significantly reduces overall costs, produces a synergistic simplification effect, and has high structural reliability.

[0063] This utility model embodiment provides a compressor, which includes the compressor motor described in the above embodiment. This compressor can be used in refrigerators, air conditioners, freezers, or heat pump water heaters, etc. Through the above solution, the compressor of this embodiment can achieve a high degree of standardization of the oil baffle 120, reducing mold development costs, inventory management costs, and supply chain coordination costs. Simultaneously, since the oil baffle 120 is decoupled from the balance block, the design of the upper balance block is no longer constrained by the structure of the oil baffle 120, making its design more flexible and simplified. Furthermore, the oil baffle 120 is fixed on the static stator assembly, providing a better working environment than when fixed on a high-speed rotating rotor, resulting in higher long-term reliability of the connection.

[0064] This utility model embodiment provides a refrigeration or heat pump device, including the compressor described in the above embodiment. The refrigeration device can be an air conditioner. The air conditioner includes an outdoor unit and an indoor unit. The outdoor unit includes a refrigerant circuit, a fan, and the compressor involved in this embodiment. The compressor can be a variable frequency rotary compressor used to drive the refrigerant to flow throughout the entire refrigeration cycle of the air conditioner.

[0065] The motor stator assembly of the compressor is fixed to the inner wall of the compressor housing. The motor rotor assembly and the counterweight 200 are supported by bearings, allowing them to rotate freely within the stator assembly. In some other alternative embodiments, the compressor may be a scroll compressor or a reciprocating compressor, and the refrigeration equipment may be a refrigerator, freezer, heat pump water heater, or heat pump air conditioner.

[0066] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A motor stator assembly, comprising a stator core, an upper insulating bracket, and an oil baffle plate, wherein the upper insulating bracket is disposed at the upper end of the stator core, characterized in that: The upper insulating bracket includes an annular outer wall and an inner wall, and a first mounting part is provided on the inner wall; The oil baffle is disposed on the upper end face of the rotor assembly of the motor, and the oil baffle is provided with a second mounting part in the circumferential direction facing the upper insulating bracket. The first mounting part and the second mounting part are connected in cooperation.

2. The motor stator assembly of claim 1, wherein, The second mounting part is a protrusion provided on the outer periphery of the oil baffle, and the first mounting part is a groove that engages with the protrusion through an interference fit.

3. The motor stator assembly of claim 1, wherein, The diameter of the outer peripheral wall of the oil baffle is smaller than the inner diameter of the inner wall.

4. The motor stator assembly of claim 1, wherein, The oil baffle plate has a rotor receiving recess facing the rotor assembly of the motor.

5. The motor stator assembly of claim 4, wherein, The axial depth of the rotor receiving recess is in the range of 0 mm to 10 mm.

6. The motor stator assembly of claim 1, wherein, The central area of ​​the oil baffle is provided with a shaft clearance hole to match the shaft of the rotor assembly.

7. The motor stator assembly of claim 6, wherein, The end of the shaft clearance hole opposite to the stator core is provided with a flange, and the axial depth of the flange is in the range of 0 mm to 10 mm.

8. The motor stator assembly of claim 1, wherein, The oil baffle plate is provided with oil flow holes.

9. A compressor motor characterized by, It includes a motor stator assembly as described in any one of claims 1 to 8, and a motor rotor assembly mounted within the stator assembly.

10. A compressor characterized by, Includes the compressor motor as described in claim 9.

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