Rotor core, rotor assembly, and compressor

Abstract

The utility model provides a kind of rotor core, rotor assembly and compressor, it is related to compressor technical field.Rotor core is provided with flow-through hole, flow-through hole extends along the axial direction of rotor core, flow-through passage is provided with at least one of first oil collecting groove and second oil collecting groove, first oil collecting groove is circumferentially ringed along the inner wall of flow-through passage, second oil collecting groove extends along the extension direction of flow-through hole, can reduce the oil discharge rate of compressor, and improve system overall operating efficiency;In addition, the disturbance that airflow is subjected to when flowing through oil collecting groove can also consume airflow energy to a certain extent, thereby effectively improving the noise generated under the specific frequency of compressor, to improve user experience in this way.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to a rotor core, rotor assembly, and compressor. Background Technology

[0002] With increasingly fierce competition in the residential air conditioning market, high-efficiency, low-cost rotary compressors have become the main direction of industry development. To optimize costs, compressor products are constantly evolving towards miniaturization. However, miniaturization leads to limited internal structural space, bringing new technical challenges to key performance control, especially in oil and gas control.

[0003] Currently, rotary compressors commonly employ an oil-blocking structure on the upper part of the rotor or stator to physically obstruct the upward path of the oil-gas mixture, achieving initial oil-gas separation. This approach is effective in larger models, but with the trend towards miniaturization, the internal installation space of the compressor has been drastically reduced, severely limiting the size and arrangement of the oil-blocking structure, leading to a significant decrease in separation efficiency. Ineffective separation of the oil-gas mixture causes more refrigerant oil to enter the condenser and evaporator of the air conditioning system, resulting in oil film accumulation inside the heat exchanger and reduced heat transfer efficiency. This decrease in heat exchange capacity directly affects the cooling / heating performance of the air conditioning system, leading to reduced overall energy efficiency and increased operating costs. Furthermore, insufficient oil inside the compressor can also cause poor lubrication, affecting operational reliability and lifespan. Utility Model Content

[0004] The purpose of this utility model is to provide a rotor core, rotor assembly and compressor, which effectively improves the oil-gas separation capability of the rotor assembly during compressor operation, thereby improving the oil discharge rate and overall operating stability of the compressor. It has a reasonable structure, high functional integration and strong adaptability, and can also improve noise problems.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In a first aspect, the present invention provides a rotor core having a flow hole extending along the axial direction of the rotor core. The flow hole has at least one of a first oil collecting groove and a second oil collecting groove, wherein the first oil collecting groove is circumferentially arranged along the inner wall of the flow hole, and the second oil collecting groove extends along the extension direction of the flow hole.

[0007] In the above embodiment, the first oil collecting groove is arranged circumferentially on the inner wall of the flow hole to form a local concave area, which can effectively capture small oil droplets moving with the airflow and form larger oil droplets after accumulating on their surface, thereby reducing the proportion of oil continuing to rise with the refrigerant gas. Furthermore, the second oil collecting groove extends along the extension direction of the flow hole, further increasing the contact area between the oil-gas mixture and the groove surface during the flow process. Under the action of centrifugal force generated by the rotor rotation, the oil droplets are more easily thrown to the inner wall of the groove and adhere stably, and finally converge and fall back to the bottom oil pool under the action of gravity. This not only achieves effective recovery of refrigeration oil without relying on additional oil-blocking structures, thereby simplifying the internal structure of the compressor, reducing the number of parts, and helping to reduce manufacturing costs and assembly difficulty, but also improves the compressor's oil-gas separation capability and improves the system's heat exchange performance through the design of the oil collecting groove. In addition, the disturbance encountered by the airflow when flowing through the first or second oil collecting groove can also consume airflow energy to a certain extent, thereby improving the noise generated by the compressor at a specific frequency, improving the overall sound quality of the machine, and thus improving the user experience.

[0008] In an optional embodiment, there are multiple first oil collection tanks, and the multiple first oil collection tanks are arranged at equal intervals.

[0009] In the above embodiment, multiple first oil collecting grooves are arranged at equal intervals, so that when the mixture of refrigerant and refrigeration oil flows from bottom to top through the flow hole during compressor operation, it can uniformly contact the first oil collecting grooves in all circumferential areas of the rotor core. Because refrigeration oil has a high viscosity, it easily adheres to solid surfaces during flow. Therefore, when flowing through the groove area, some oil droplets are captured by the groove structure and gradually accumulate. Under the combined action of subsequent airflow disturbance and gravity, larger oil droplets are formed and eventually fall back into the bottom oil pool.

[0010] In an optional embodiment, there are multiple first oil collection tanks, and the distance between two adjacent first oil collection tanks gradually decreases along the first direction;

[0011] Wherein, the first direction is the direction of airflow along the flow hole during operation.

[0012] In the above embodiment, the distance between two adjacent first oil collecting grooves gradually decreases along the first direction, that is, the distance between multiple oil collecting grooves is arranged in a non-uniform distribution. The purpose is to optimize the oil droplet collection efficiency according to the flow characteristics of the oil-gas mixture at different positions in the flow hole, thereby further improving the oil-gas separation performance of the rotor core.

[0013] In an optional embodiment, the flow hole is formed by opposing first inner walls and second inner walls, the second inner wall being located on the side of the first inner wall away from the axis of the rotor core, and the number of second oil collection grooves is multiple, the multiple second oil collection grooves being equally spaced on the second inner wall.

[0014] In the above embodiments, lubricating oil or coolant can be effectively guided to the second oil collection groove and then distributed along a predetermined path to the key heat-generating or friction-prone parts of the rotor core, thereby improving lubrication efficiency and heat dissipation. Furthermore, the multiple second oil collection grooves are arranged at equal intervals, which helps to achieve uniform distribution of the lubricating medium during rotor rotation, avoiding uneven lubrication or localized overheating caused by uneven distribution of the oil collection grooves.

[0015] In an optional embodiment, the flow hole is formed by opposing first inner walls and second inner walls, the second inner wall being located on the side of the first inner wall away from the axis of the rotor core, and there are multiple second oil collection grooves, all of which are disposed on the second inner wall, and the distance between two adjacent second oil collection grooves gradually increases along the second direction.

[0016] Wherein, the second direction is the rotation direction of the rotor core in the working state.

[0017] In the above embodiment, the second oil collecting grooves are distributed with gradually increasing spacing along the rotation direction. This allows the lubricating oil to be gradually released and evenly distributed in different second oil collecting grooves as the rotor rotates at high speed, thus forming a dynamic lubrication path that adapts to changes in rotational speed. Therefore, this helps maintain a stable lubrication effect under different operating speeds and avoids localized wear or temperature increases caused by uneven lubricating oil distribution.

[0018] In an optional embodiment, the depth of the first oil collecting groove is d1, where d1 ≤ 1 mm, and the width of the first oil collecting groove is w1, where w1 ≤ h1.

[0019] In the above embodiment, by limiting the depth and width of the first oil collecting groove, it is possible to effectively store and guide lubricating oil or coolant to the critical friction or heat-generating areas of the rotor core without weakening the structural strength of the flow hole. The design of a depth d1≤1mm ensures that the oil collecting groove will not affect the overall structural integrity of the flow hole due to excessive depth, thereby avoiding fatigue damage or structural failure caused by local stress concentration during high-speed rotation. At the same time, the setting of a width w1≤h1 further ensures the dimensional adaptability of the oil collecting groove in the radial direction, allowing it to match the local structural dimensions of the rotor core, thereby achieving effective distribution of lubricating oil without affecting the overall mechanical properties of the rotor.

[0020] In an optional embodiment, the depth of the second oil collecting groove in the rotor core is d2, h2≤1mm, and the width of the second oil collecting groove is w2, w2≤w1.

[0021] In the above embodiment, the depth d2 of the second oil collecting groove does not exceed 1 mm. This helps to ensure oil collection capacity while avoiding local stress concentration or structural strength reduction due to excessive groove depth. Especially under high-speed rotor rotation, it can effectively improve the structural stability and fatigue durability of this area. At the same time, the width w2 does not exceed the width w1 of the first oil collecting groove, so that the second oil collecting groove forms a progressive or matching relationship with the first oil collecting groove in terms of size. This facilitates the orderly transfer of lubricating medium from the first oil collecting groove to the second oil collecting groove during rotation, and avoids lubricating oil stagnation or flow turbulence due to excessive width, which would affect the overall efficiency of the lubrication system.

[0022] In an optional embodiment, there are multiple flow holes, which are evenly distributed around the axis of the rotor core.

[0023] In the above embodiments, multiple flow holes are evenly distributed around the axis of the rotor core, which not only enhances the dynamic balance performance of the rotor core in terms of structure, but also improves its heat dissipation capacity in terms of function, thereby improving the overall operational stability and reliability.

[0024] Secondly, this utility model provides a rotor assembly, including a balance block, end plates, end cores, and a rotor core as described in any of the foregoing embodiments. The two end cores are respectively disposed at both ends of the rotor core, and the end cores are provided with through holes corresponding to and communicating with the flow holes. The two end plates are respectively disposed at the two end cores, and the two balance blocks are respectively disposed at the two end plates.

[0025] Thirdly, this utility model provides a compressor, including a housing, a lower cover, a pump body assembly, a stator assembly, and a rotor assembly as described in any of the foregoing embodiments. The housing is connected to the lower cover, the pump body assembly, the stator assembly, and the rotor assembly are all disposed within the cavity formed by the housing and the lower cover, the rotor assembly is disposed within the stator assembly, and the pump body assembly is connected to the rotor assembly.

[0026] The beneficial effects of the rotor core, rotor assembly, and compressor provided in this embodiment of the invention include: by setting at least one of a first oil collecting groove and a second oil collecting groove in the flow hole, wherein the first oil collecting groove is arranged circumferentially on the inner wall of the flow hole to form a local concave area, it can effectively capture small oil droplets moving with the airflow and form larger oil droplets after accumulating on their surface, thereby reducing the proportion of oil continuing to rise with the refrigerant gas; while the second oil collecting groove extends along the extension direction of the flow hole, further increasing the contact area between the oil-gas mixture and the groove surface during the flow process, and under the action of centrifugal force generated by the rotor rotation, the oil droplets are more easily thrown to the inner wall of the groove and stably adhered, and finally converge and fall back to the bottom oil pool under the action of gravity. It can be seen that the rotor core can effectively participate in the oil-gas separation process during the operation of the compressor, thereby reducing the oil discharge rate of the compressor and improving the overall operating efficiency of the system; in addition, the disturbance encountered by the airflow when flowing through the oil collecting groove can also consume the airflow energy to a certain extent, thereby effectively improving the noise generated by the compressor at a specific frequency, thereby improving the user experience. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A partial sectional view of the compressor provided in an embodiment of this utility model;

[0029] Figure 2 A cross-sectional view of the rotor assembly provided in an embodiment of this utility model;

[0030] Figure 3 A longitudinal sectional view of the rotor core provided in an embodiment of this utility model;

[0031] Figure 4 A transverse sectional view of the rotor core provided in an embodiment of this utility model;

[0032] Figure 5 This is a longitudinal sectional view of the first embodiment of the rotor core provided by this utility model.

[0033] Figure 6 This is a longitudinal sectional view of the second embodiment of the rotor core provided by this utility model.

[0034] Figure 7 A schematic diagram of the third embodiment of the rotor core provided by this utility model;

[0035] Figure 8 This is a schematic diagram of the fourth embodiment of the rotor core provided by this utility model.

[0036] Icons: 1-Compressor; 10-Rotor assembly; 100-Rotor core; 110-Flow hole; 120-First oil collection tank; 130-Second oil collection tank; 140-First inner wall; 150-Second inner wall; 200-Balance block; 300-End plate; 400-End core; 410-Through hole; 11-Outer casing; 12-Lower cover; 13-Pump body assembly; 14-Stator assembly. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] As competition intensifies in the residential air conditioning market, high-efficiency, low-cost rotary compressors have become the main direction of industry development. To optimize costs, compressor products are continuously moving towards miniaturization. However, miniaturization leads to limited internal structural space, bringing new technical challenges to key performance control, especially in oil and gas control.

[0044] Currently, rotary compressors commonly employ an oil-blocking structure on the upper part of the rotor or stator to physically obstruct the upward path of the oil-gas mixture, achieving initial oil-gas separation. This approach is effective in larger models, but with the trend towards miniaturization, the internal installation space of the compressor has been drastically reduced, severely limiting the size and placement of the oil-blocking structure, leading to a significant decrease in separation efficiency. Ineffective separation of the oil-gas mixture causes more refrigerant oil to enter the condenser and evaporator of the air conditioning system, resulting in oil film accumulation inside the heat exchanger and reduced heat transfer efficiency. This decrease in heat exchange capacity directly affects the cooling / heating performance of the air conditioning system, leading to reduced overall energy efficiency and increased operating costs. Furthermore, insufficient oil inside the compressor can also cause poor lubrication, affecting operational reliability and lifespan.

[0045] Therefore, there is an urgent need to provide a high-efficiency oil-gas control scheme suitable for miniaturized rotary compressors, in order to overcome the problem of weakened separation effect caused by space constraints in existing oil baffle structures, improve oil-gas separation efficiency, ensure system performance and reliability, and meet the development needs of high-efficiency and low-cost compressors.

[0046] Based on the problems existing in the current technology, please refer to Figure 1This utility model provides a compressor 1, which is applicable to household appliances such as air conditioners. The compressor 1 includes a rotor assembly 10, a housing 11, a lower cover 12, a pump body assembly 13, and a stator assembly 14. The housing 11 is connected to the lower cover 12. The pump body assembly 13, the stator assembly 14, and the rotor assembly 10 are all disposed within the cavity formed by the housing 11 and the lower cover 12. The rotor assembly 10 is disposed within the stator assembly 14. The pump body assembly 13 is connected to the rotor assembly 10.

[0047] Therefore, during the operation of compressor 1, the pump body assembly 13 drives the rotor assembly 10 to move, thereby realizing the functions of power transmission and gas compression. This allows the mixture of refrigerant and refrigeration oil to flow upward from the lower cavity of the motor through the flow hole 110 in the rotor core 100. The rotor core 100 provided in this embodiment can improve the refrigeration oil separation capability, thereby improving the cooling and heating capabilities of the air conditioning system.

[0048] Specifically, such as Figure 2 As shown, the rotor assembly 10 includes a rotor core 100, a balance block 200, an end plate 300, and an end core 400. The two end cores 400 are respectively disposed at both ends of the rotor core 100. The end core 400 is provided with a through hole 410 corresponding to the flow hole 110. The two end plates 300 are respectively disposed at the two end cores 400, and the two balance blocks 200 are respectively disposed at the two end plates 300.

[0049] As can be seen, the iron core provided in this embodiment is composed of multiple segments, namely, the end iron core 400, the rotor iron core 100 and the end plate 300 iron core connected in sequence along the axis. The two end iron cores 400 are provided with through holes 410 that correspond to and communicate with the internal flow holes 110 of the rotor iron core 100, thereby forming a complete channel for the oil-gas mixture to flow between the upper and lower cavities of the motor. The two end plates 300 are respectively disposed on the outer side of the two end iron cores 400, and the two balance blocks 200 are respectively fixed on the end plates 300 to balance the centrifugal force during rotor rotation and ensure the stability of the rotor assembly 10 under high-speed operation.

[0050] Among them, such as Figure 3 and Figure 4 As shown, the rotor core 100 is provided with a flow hole 110, which extends along the axial direction of the rotor core 100. The flow hole 110 is provided with at least one of a first oil collecting groove 120 and a second oil collecting groove 130. The first oil collecting groove 120 is circumferentially arranged along the inner wall of the flow hole 110, and the second oil collecting groove 130 extends along the extension direction of the flow hole 110. This allows the rotor core 100 to effectively participate in the oil-gas separation process during the operation of the compressor 1, thereby reducing the oil discharge rate of the compressor 1 and improving the overall operating efficiency of the system.

[0051] Specifically, when the compressor 1 is running, the refrigerant and refrigeration oil mixture in the motor cavity flows upward along the flow hole 110 of the rotor core 100, driven by airflow. Due to its higher viscosity, the refrigeration oil readily adheres to the inner wall surface of the flow hole 110. Therefore, the first oil collecting groove 120, arranged circumferentially on the inner wall of the flow hole 110 to form a localized recessed area, effectively captures small oil droplets moving with the airflow, causing them to accumulate on its surface and form larger droplets, thus reducing the proportion of oil continuing to rise with the refrigerant gas. Furthermore, the second oil collecting groove 130, extending along the extension direction of the flow hole 110, further increases the contact area between the oil-gas mixture and the groove surface during flow. Under the centrifugal force generated by the rotor rotation, the oil droplets are more easily thrown to the inner wall of the groove and stably adhered, ultimately converging and falling back to the bottom oil sump under gravity.

[0052] This design endows the rotor core 100 with a certain oil-gas separation function, thus enabling effective recovery of refrigeration oil without relying on an additional oil-blocking structure. This simplifies the internal structure of the compressor 1, reduces the number of parts, and helps lower manufacturing costs and assembly difficulty. It is evident that the rotor core 100 not only structurally integrates well with other components of the compressor 1, but also enhances the oil-gas separation capability of the compressor 1 and improves the system's heat exchange performance through the design of the oil collection trough. Furthermore, the disturbance experienced by the airflow as it passes through the first oil collection trough 120 or the second oil collection trough 130 can, to some extent, dissipate airflow energy, thereby reducing the noise generated by the compressor 1 at specific frequencies, improving the overall sound quality, and ultimately enhancing the user experience.

[0053] It should be noted that there are multiple flow holes 110, which are evenly distributed around the axis of the rotor core 100. This not only enhances the dynamic balance performance of the rotor core 100 in terms of structure, but also improves its heat dissipation capacity in terms of function, thereby improving the overall operational stability and reliability.

[0054] Furthermore, such as Figure 5 As shown, there are multiple first oil collecting grooves 120, which are evenly spaced to ensure that when the compressor 1 is operating, the mixture of refrigerant and refrigeration oil flows from bottom to top through the flow hole 110, and can uniformly contact the first oil collecting grooves 120 in all circumferential areas of the rotor core 100. Because refrigeration oil has a high viscosity, it easily adheres to solid surfaces during flow. Therefore, when flowing through the groove area, some oil droplets are captured by the groove structure and gradually accumulate. Under the combined action of subsequent airflow disturbance and gravity, larger oil droplets are formed and eventually fall back into the bottom oil pool.

[0055] Specifically, such as Figure 5As shown, there are three first oil collecting grooves 120. The distance between two adjacent first oil collecting grooves 120 near the top of the rotor core 100 is h1, and the distance between two adjacent first oil collecting grooves 120 near the bottom of the rotor core 100 is h2, where h1=h2. It can be understood that the number of first oil collecting grooves 120 can also be other numbers, which are not specifically limited here.

[0056] Of course, in other embodiments of this utility model, such as Figure 6 As shown, the distance between two adjacent first oil collecting grooves 120 gradually decreases along the first direction, that is, the distance between multiple oil collecting grooves is arranged in a non-uniform distribution. The purpose is to optimize the oil droplet collection efficiency according to the flow characteristics of the oil-gas mixture at different positions in the flow hole 110, thereby further improving the oil-gas separation performance of the rotor core 100.

[0057] It should be noted that the first direction is the direction of airflow along the flow hole 110 during operation, i.e. Figure 6 The arrow points in the direction of A.

[0058] This design ensures that in the initial stage when the oil-gas mixture enters the flow hole 110, its flow velocity is relatively high and the oil droplet distribution is relatively sparse. At this time, the groove spacing is relatively large, which can avoid excessive airflow disturbance caused by excessive groove density. In the area where the mixture continues to rise, the flow velocity decreases and the oil droplet concentration increases, the groove spacing gradually decreases, thereby improving the oil droplet capture capacity per unit length, allowing more oil droplets to accumulate in the groove and eventually fall back into the oil pool.

[0059] It can be seen that by arranging multiple first oil collecting tanks 120 on the inner wall of the flow hole 110 with a non-uniform spacing that gradually decreases along the airflow direction, the oil collecting tank structure can better match the flow characteristics of the oil-gas mixture, thereby achieving a more efficient and stable oil droplet collection and separation effect.

[0060] Specifically, as shown in the figure, there are four first oil collecting grooves 120. The distance between two adjacent first oil collecting grooves 120 near the top of the rotor core 100 is h1, the distance between two adjacent first oil collecting grooves 120 in the middle is h2, and the distance between two adjacent first oil collecting grooves 120 near the bottom of the rotor core 100 is h3, where h1 < h2 < h3. It can be understood that the number of first oil collecting grooves 120 can also be other than that, and no specific limitation is made here.

[0061] It should also be noted that the depth of the first oil collection tank 120 is d1, where d1 ≤ 1 mm, and the width of the first oil collection tank 120 is w1, where w1 ≤ h1.

[0062] In this embodiment, by limiting the depth and width of the first oil collecting groove 120, the groove can effectively store and guide lubricating oil or coolant to the critical friction or heat-generating areas of the rotor core 100 without weakening the structural strength of the flow hole 110. The depth d1 ≤ 1 mm ensures that the groove will not affect the overall structural integrity of the flow hole 110 due to excessive depth, thereby avoiding fatigue damage or structural failure caused by local stress concentration during high-speed rotation. Simultaneously, the width w1 ≤ h1 further ensures the dimensional adaptability of the groove in the radial direction, allowing it to match the local structural dimensions of the rotor core 100, thus achieving effective distribution of lubricating oil without affecting the overall mechanical properties of the rotor.

[0063] like Figure 7 As shown, the flow hole 110 is formed by opposing first inner wall 140 and second inner wall 150. The second inner wall 150 is located on the side of the first inner wall 140 away from the axis of the rotor core 100. There are multiple second oil collection grooves 130, and the multiple second oil collection grooves 130 are equally spaced on the second inner wall 150.

[0064] It is worth mentioning that, during the operation of the compressor 1, the mixture located in the flow hole 110 will be concentrated on the side of the flow hole 110 away from the rotor core 100 and away from the axis due to centrifugal force. Therefore, the lubricating oil or coolant can be more effectively guided to the second oil collection tank 130 and then distributed to the key heat-generating or friction parts of the rotor core 100 along a predetermined path, thereby improving lubrication efficiency and heat dissipation effect.

[0065] In addition, the multiple second oil collection grooves 130 are arranged at equal intervals, which helps to achieve uniform distribution of lubricating medium during rotor rotation and avoid uneven lubrication or local overheating caused by uneven distribution of oil collection grooves.

[0066] Specifically, such as Figure 7 As shown, there are three second oil collection grooves 130. The line connecting the center of the second oil collection groove 130 to the axis of the rotor core 100 forms an angle θ1 with the line connecting the center of the adjacent second oil collection groove 130 to the axis of the rotor core 100. The line connecting the center of another second oil collection groove 130 to the axis of the rotor core 100 forms an angle θ2 with the line connecting the center of the adjacent second oil collection groove 130 to the axis of the rotor core 100. θ1=θ2.

[0067] It should be noted that both the first inner wall 140 and the second inner wall 150 are arc-shaped, and on the cross-section of the rotor core 100, the first inner wall 140 of the multiple flow holes 110 are located on the same circumference with the axis of the rotor core 100 as the center, and the second inner wall 150 of the multiple flow holes 110 are located on the same circumference with the axis of the rotor core 100 as the center.

[0068] Of course, in other embodiments of this utility model, such as Figure 8 As shown, multiple second oil collection tanks 130 are disposed on the second inner wall 150, and the distance between two adjacent second oil collection tanks 130 gradually increases along the second direction.

[0069] It should be noted that the second direction is the rotation direction of the rotor core 100 in the working state, that is, with respect to... Figure 7 and Figure 8 The direction indicated by counterclockwise rotation is B.

[0070] In this embodiment, the second oil collecting grooves 130 are distributed with gradually increasing spacing along the rotation direction. This allows the lubricating oil to be gradually released and evenly distributed in the different second oil collecting grooves 130 as the rotor rotates at high speed, thus forming a dynamic lubrication path that adapts to changes in rotational speed. Therefore, this helps maintain a stable lubrication effect under different operating speeds and avoids localized wear or temperature increases caused by uneven lubricating oil distribution.

[0071] Specifically, such as Figure 8 As shown, there are four second oil collection grooves 130. Along the second direction, the line connecting the center of the second oil collection groove 130 to the axis of the rotor core 100 forms an angle θ1 with the line connecting the center of the adjacent second oil collection groove 130 to the axis of the rotor core 100. The line connecting the center of another second oil collection groove 130 to the axis of the rotor core 100 forms an angle θ2 with the line connecting the center of the adjacent second oil collection groove 130 to the axis of the rotor core 100. The line connecting the center of another second oil collection groove 130 to the axis of the rotor core 100 forms an angle θ3 with the line connecting the center of the adjacent second oil collection groove 130 to the axis of the rotor core 100. θ1 < θ2 < θ3.

[0072] It should also be noted that the depth of the second oil collecting tank 130 is d2, h2≤1mm, and the width of the second oil collecting tank 130 is w2, w2≤w1.

[0073] In this embodiment, the depth d2 of the second oil collecting groove 130 does not exceed 1 mm. This helps to ensure oil collection capacity while avoiding local stress concentration or structural strength reduction due to excessive groove depth. Especially under high-speed rotor rotation, it can effectively improve the structural stability and fatigue durability of this area. At the same time, the width w2 does not exceed the width w1 of the first oil collecting groove 120, so that the second oil collecting groove 130 forms a progressive or matching relationship with the first oil collecting groove 120 in terms of size. This facilitates the orderly transfer of lubricating medium from the first oil collecting groove 120 to the second oil collecting groove 130 during rotation, avoiding local stagnation or turbulent flow of lubricating oil due to excessive width, which would affect the overall efficiency of the lubrication system.

[0074] It is worth mentioning that the second oil collection groove 130 penetrates the first oil collection groove 120, making the two organically connected in terms of spatial structure. This makes the distribution path of lubricating oil in the inner wall area of ​​the flow hole 110 more continuous and efficient.

[0075] In summary, this utility model provides a rotor core 100, a rotor assembly 10, and a compressor 1. The first oil collecting groove 120 is arranged in a circumferential manner on the inner wall of the flow hole 110 to form a local concave area, which can effectively capture small oil droplets moving with the airflow and form larger oil droplets after accumulating on its surface, thereby reducing the proportion of oil that continues to rise with the refrigerant gas. Furthermore, by extending the second oil collection trough 130 along the extension direction of the flow hole 110, the contact area between the oil-gas mixture and the trough surface during flow is further increased. Under the centrifugal force generated by the rotor rotation, oil droplets are more easily thrown onto the inner wall of the trough and adhere stably, eventually converging and falling back to the bottom oil pool under gravity. This not only achieves effective recovery of refrigeration oil without relying on additional oil-blocking structures, thereby simplifying the internal structure of the compressor 1, reducing the number of parts, and helping to reduce manufacturing costs and assembly difficulty, but also improves the oil-gas separation capability of the compressor 1 and improves the system's heat exchange performance through the design of the oil collection trough. In addition, the disturbance encountered by the airflow when flowing through the first oil collection trough 120 or the second oil collection trough 130 can also consume airflow energy to a certain extent, thereby improving the noise generated by the compressor 1 at a specific frequency, improving the overall sound quality, and thus enhancing the user experience.

[0076] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotor core, characterized in that, The rotor core is provided with a flow hole (110), which extends along the axial direction of the rotor core. At least one of a first oil collecting groove (120) and a second oil collecting groove (130) is provided in the flow hole (110). The first oil collecting groove (120) is circumferentially arranged along the inner wall of the flow hole (110), and the second oil collecting groove (130) extends along the extension direction of the flow hole (110).

2. The rotor core according to claim 1, characterized in that, There are multiple first oil collection tanks (120), and the multiple first oil collection tanks (120) are arranged at equal intervals.

3. The rotor core according to claim 1, characterized in that, There are multiple first oil collection tanks (120), and the distance between two adjacent first oil collection tanks (120) gradually decreases along the first direction; Wherein, the first direction is the direction of airflow along the flow hole (110) in the working state.

4. The rotor core according to any one of claims 1-3, characterized in that, The flow hole (110) is formed by opposing first inner wall (140) and second inner wall (150), the second inner wall (150) being located on the side of the first inner wall (140) away from the axis of the rotor core, and the number of second oil collection grooves (130) is multiple, and the multiple second oil collection grooves (130) are equally spaced on the second inner wall (150).

5. The rotor core according to any one of claims 1-3, characterized in that, The flow hole (110) is formed by opposing first inner wall (140) and second inner wall (150), the second inner wall (150) is located on the side of the first inner wall (140) away from the axis of the rotor core, and there are multiple second oil collection grooves (130), all of which are provided on the second inner wall (150), and the distance between two adjacent second oil collection grooves (130) gradually increases along the second direction; Wherein, the second direction is the rotation direction of the rotor core in the working state.

6. The rotor core according to claim 1, characterized in that, The depth of the first oil collection trough (120) is d1, d1≤1mm, and the width of the first oil collection trough (120) is w1, w1≤h1.

7. The rotor core according to claim 6, characterized in that, The depth of the second oil collection trough (130) is d2, h2≤1mm, and the width of the second oil collection trough (130) is w2, w2≤w1.

8. The rotor core according to claim 1, characterized in that, The number of flow holes (110) is multiple, and the multiple flow holes (110) are evenly distributed around the axis of the rotor core.

9. A rotor assembly, characterized in that, The rotor core includes a balance block (200), an end plate (300), an end core (400), and a rotor core as described in any one of claims 1-8. The two end cores (400) are respectively disposed at both ends of the rotor core. The end core (400) is provided with a through hole (410) corresponding to and communicating with the flow hole (110). The two end plates (300) are respectively disposed at the two end cores (400), and the two balance blocks (200) are respectively disposed at the two end plates (300).

10. A compressor, characterized in that, The device includes a housing (11), a lower cover (12), a pump body assembly (13), a stator assembly (14), and a rotor assembly (10) as described in claim 9. The housing (11) is connected to the lower cover (12). The pump body assembly (13), the stator assembly (14), and the rotor assembly (10) are all disposed within the cavity formed by the housing (11) and the lower cover (12). The rotor assembly (10) is disposed on the stator assembly (14). The pump body assembly (13) is connected to the rotor assembly (10).

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