Rotor assembly, electric machine, compressor and refrigeration appliance

Abstract

The application relates to the motor technical field and provides a rotor assembly, a motor, a compressor and a refrigeration device. The rotor assembly comprises a rotor, a balance assembly arranged on the end face of the rotor and arranged in the circumferential direction of the end face of the rotor, the balance assembly comprises a first counterweight, a second counterweight and a third counterweight, the first counterweight, the second counterweight and the third counterweight are arranged at intervals, and the second counterweight is located between the first counterweight and the third counterweight; wherein the first counterweight and the second counterweight enclose a first oil return channel, the second counterweight and the third counterweight enclose a second oil return channel, and the first oil return channel and the second oil return channel are used for guiding the oil liquid on the end face of the rotor. Through the split design of the balance assembly and the cooperation gap formed between the counterweights, the cooperation gap can be used as an oil guiding channel, so that the lubricating oil accumulated on the upper part of the stator can flow back to the lower oil pool of the motor, thereby forming a good oil path circulation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a rotor assembly, an electric machine, a compressor and a refrigeration device. BACKGROUND

[0002] At present, in order to reduce the swing of the eccentric shaft, the rotating compressor in the related art usually sets a counterweight block at the end of the rotor to balance the centrifugal force of the eccentric shaft. However, the unreasonable design of the counterweight block leads to large wind resistance and weight of the counterweight block, causing part of the lubricating oil to accumulate in the upper part of the stator and be difficult to return to the lower oil pool, so that a good oil circulation cannot be formed in the electric machine. SUMMARY

[0003] The present application aims to at least solve the technical problem in the related art that, due to the unreasonable design of the counterweight block, part of the lubricating oil accumulates in the upper part of the stator and is difficult to return to the lower oil pool of the electric machine, so that a good oil circulation cannot be formed in the electric machine.

[0004] To this end, the present application provides a rotor assembly in the first aspect.

[0005] The present application provides an electric machine in the second aspect.

[0006] The present application provides a compressor in the third aspect.

[0007] The present application provides a refrigeration device in the fourth aspect.

[0008] Therefore, the present application provides a rotor assembly, which comprises a rotor and a balance assembly. The balance assembly is arranged on the end face of the rotor and is arranged circumferentially along the end face of the rotor. The balance assembly comprises a first counterweight block, a second counterweight block and a third counterweight block. The first counterweight block, the second counterweight block and the third counterweight block are arranged at intervals, and the second counterweight block is located between the first counterweight block and the third counterweight block. The first counterweight block and the second counterweight block enclose a first oil return channel, and the second counterweight block and the third counterweight block enclose a second oil return channel. The first oil return channel and the second oil return channel are used for guiding the oil on the end face of the rotor.

[0009] The rotor assembly provided by the application comprises a rotor and a balancing assembly. The balancing assembly is arranged on the end face of the rotor and is arranged circumferentially along the end face of the rotor, that is, the balancing assembly is fixed on the end faces of the two ends of the rotor and is arranged and distributed circumferentially along the end face of the rotor, so that the rotor is counterweighted, the balancing assembly is used for balancing the centrifugal force of the eccentric shaft in the motor, and the shaking of the eccentric shaft in the rotating process is reduced. In addition, the balancing assembly comprises a first counterweight block, a second counterweight block and a third counterweight block, the first counterweight block, the second counterweight block and the third counterweight block are arranged circumferentially along the end face of the rotor, the first counterweight block, the second counterweight block and the third counterweight block are arranged at intervals, that is, the first counterweight block, the second counterweight block and the third counterweight block have a spacing therebetween, and the second counterweight block is located between the first counterweight block and the third counterweight block; wherein the first counterweight block and the second counterweight block form a first oil return channel, that is, the gap between the first counterweight block and the second counterweight block forms the first oil return channel, the second counterweight block and the third counterweight block form a second oil return channel, that is, the gap between the second counterweight block and the third counterweight block forms the second oil return channel, and the first oil return channel and the second oil return channel are used for draining the oil on the end face of the rotor.

[0010] By designing the balancing assembly in a split manner and forming a fitting gap or spacing between the second counterweight block and the first counterweight block and between the second counterweight block and the third counterweight block, the fitting gap can be used as an oil guide channel, so that the lubricating oil accumulated on the upper part of the stator can flow to the inside of the rotor assembly through the gap or spacing between the second counterweight block and the first counterweight block and the gap or spacing between the second counterweight block and the third counterweight block, so that the lubricating oil accumulated on the upper part of the stator can flow back to the lower oil pool of the motor to form a good oil circulation. Thus, the balancing assembly can improve the problem of poor oil circulation in the internal oil circuit of the compressor on the basis of realizing the counterweight function, and improve the working efficiency and stability of the compressor.

[0011] According to the rotor assembly of the above technical solution of the application, the following additional technical features can be further provided.

[0012] In some technical solutions, a cross section along the radial direction of the rotor is provided, and in the cross section along the radial direction of the rotor, the minimum width of the first oil return channel is L1 and the minimum width of the second oil return channel is L2, wherein 1mm≤L1≤3mm and 1mm≤L2≤3mm.

[0013] In the technical solution, a cross section is taken along the radial direction of the rotor, and in the radial cross section of the rotor, the minimum width of the first oil return channel is L1, and the minimum width of the second oil return channel is L2. In order to ensure that the lubricating oil can smoothly pass through the first oil return channel and the second oil return channel, while avoiding the width of the first oil return channel and the second oil return channel being too wide, resulting in a decrease in the structural strength of the balance assembly, a reasonable width range is set, specifically, L1 and L2 satisfy: 1mm≤L1≤3mm, 1mm≤L2≤3mm. Such width design not only ensures sufficient oil guiding capacity, but also ensures the overall structural strength of the balance assembly, so that the rotor assembly can maintain stability and reliability when rotating at high speed.

[0014] In some technical solutions, optionally, the size of the second counterweight can be adjusted to change the minimum width L1 of the first oil return channel and the minimum width L2 of the second oil return channel by adjusting the size of the second counterweight.

[0015] In the technical solution, the size of the second counterweight can be adjusted, that is, the size of the second counterweight can be changed, and by adjusting the size of the second counterweight, the minimum width L1 of the first oil return channel and the minimum width L2 of the second oil return channel are changed, and then by changing the width of the first oil return channel and the width of the second oil return channel, the flow speed and pressure of the lubricating oil in the two channels can be changed, so that the lubricating oil can smoothly pass through the first oil return channel and the second oil return channel, and the lubricating oil can better cool and lubricate the rotor assembly, improving the operating efficiency and stability of the motor.

[0016] In some technical solutions, optionally, the width of the first oil return channel and the width of the second oil return channel are the same, or the width of the first oil return channel and the width of the second oil return channel are different.

[0017] In the technical solution, by setting the width of the first oil return channel and the width of the second oil return channel to be the same, the flow speed and pressure distribution of the lubricating oil in the two channels can be ensured to be more uniform, thereby avoiding the phenomenon of oil flow deviation or local blockage caused by the difference in channel width. Such uniformly distributed lubricating oil can better cool and lubricate the rotor assembly, improving the operating efficiency and stability of the motor.

[0018] By setting the width of the first oil return channel and the width of the second oil return channel to be different, the oil guiding capacity of the two channels can be adjusted according to actual needs. For example, in some areas of the rotor assembly, more lubricating oil may be needed for cooling and lubrication, at which time the width of the oil return channel in this area can be appropriately increased. While in other areas, if the demand for lubricating oil is less, the width of the oil return channel can be appropriately reduced to reduce the waste and energy consumption of oil.

[0019] In some embodiments, the rotor assembly further comprises a rotor core, the rotor core is arranged in the rotor, and the rotor core is provided with an oil return hole.

[0020] In the technical scheme, the rotor assembly further comprises a rotor core, the rotor core is arranged in the rotor, and the rotor core is provided with an oil return hole.

[0021] In some embodiments, the number of oil return holes is multiple, the multiple oil return holes are uniformly distributed on the rotor core, and the multiple oil return holes are circumferentially arranged along the end surface of the rotor core.

[0022] In the technical scheme, the number of oil return holes is multiple, and the multiple oil return holes are uniformly distributed on the rotor core and circumferentially arranged along the end surface of the rotor core.

[0023] In some embodiments, the balancing assembly is provided with a positioning hole, the positioning hole is arranged on the first counterweight, the second counterweight and the third counterweight respectively, and the positioning hole is used for fixing and positioning the first counterweight, the second counterweight and the third counterweight.

[0024] In the technical scheme, the positioning hole is arranged on the balancing assembly, and the positioning hole is arranged on the first counterweight, the second counterweight and the third counterweight respectively.

[0025] In some embodiments, the number of balancing assemblies is two, the two balancing assemblies are arranged at two ends of the rotor respectively, and the two balancing assemblies are distributed in a staggered manner at the installation positions of the two ends of the rotor.

[0026] In the technical solution, two sets of balancing assemblies are arranged at two ends of the rotor, and the installation positions of the two sets of balancing assemblies at the two ends of the rotor are not completely corresponding but are staggered. Such arrangement not only further improves the balancing performance of the rotor assembly, but also helps to reduce the vibration and noise of the motor during high-speed rotation. Meanwhile, since the installation positions of the two sets of balancing assemblies at the two ends of the rotor are staggered, the lubricating oil can quickly flow into the rotor core through the first and second oil return channels, improving the oil return efficiency of the lubricating oil circuit.

[0027] In some technical solutions, a cross section is taken along the radial direction of the rotor, and the projection of the balancing assembly on the cross section is located within the projection of the rotor on the cross section.

[0028] In the technical solution, in the cross section of the rotor, the projection of the balancing assembly on the cross section is located within the projection of the rotor on the cross section, that is, the outer diameter of the balancing assembly is smaller than the outer diameter of the rotor, which can also be understood as the outer diameter of the balancing assembly is smaller than the outer diameter of the rotor, so that the outer size of the balancing assembly does not exceed the outer circumferential surface of the rotor, which does not increase the overall diameter of the motor. It helps to reduce the wind resistance and energy consumption of the motor during high-speed rotation, and facilitates the compactness and lightweight design of the motor.

[0029] According to the second aspect of the present application, a motor is also provided, which comprises the rotor assembly in the above-mentioned solution, and a stator assembly, the stator assembly being arranged on the rotor assembly; and a housing, the stator assembly and the rotor assembly being arranged in the housing.

[0030] The motor provided by the present application has all the beneficial effects of the rotor assembly described above, and thus the detailed description is omitted here.

[0031] In addition, the motor further comprises a stator assembly and a housing, wherein the stator assembly is arranged on the rotor assembly, and the stator assembly and the rotor assembly are arranged in the housing. The housing serves as an external protective structure of the motor, which not only provides necessary mechanical support, but also plays a role in protection and heat dissipation.

[0032] According to the third aspect of the present application, a compressor is also provided, which comprises the motor in the above-mentioned solution.

[0033] The compressor provided by the present application has all the beneficial effects of the motor described above, and thus the detailed description is omitted here.

[0034] According to the fourth aspect of the present application, a refrigeration device is also provided, which comprises the compressor in the above-mentioned solution.

[0035] The refrigeration equipment provided in the application has all the beneficial effects of the compressor, and the details are not repeated here.

[0036] Additional aspects and advantages of the application will be made apparent by the following description and the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, from which the singular aspects become apparent.

[0038] Figure 1 Structure diagram of a rotor assembly according to an embodiment of the application;

[0039] Figure 2 Structure diagram of a rotor assembly according to an embodiment of the application from another perspective;

[0040] Figure 3 Structure diagram of a rotor assembly according to an embodiment of the application; Figure 1 Structure diagram of a balancing assembly in a rotor assembly according to an embodiment of the application;

[0041] Figure 4 Structure diagram of a balancing assembly in a rotor assembly according to an embodiment of the application from another perspective; Figure 1 Structure diagram of a balancing assembly in a rotor assembly according to an embodiment of the application from another perspective;

[0042] Figure 5 Structure diagram of a refrigeration equipment according to an embodiment of the application.

[0043] Wherein, Figures 1 to 5 The correspondence between the reference signs and the component names in the drawings is as follows:

[0044] 100 rotor assembly, 110 rotor, 112 rotor core, 114 oil return hole, 120 balancing assembly, 122 first counterweight, 124 second counterweight, 126 third counterweight, 128 positioning hole, 130 first oil return channel, 140 second oil return channel, 200 motor, 210 stator assembly, 220 housing, 300 compressor, 400 refrigeration equipment. DETAILED DESCRIPTION

[0045] In order to enable a more complete understanding of the above-mentioned purposes, features and advantages of the application, the application will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

[0046] In the following description, many specific details are set forth in order to provide a thorough understanding of the application, but the application can also be practiced without the specific details described herein, and therefore, the scope of protection of the application is not limited by the specific embodiments disclosed below.

[0047] A rotor assembly 100, an electric machine 200, a compressor 300 and a refrigeration device 400 according to some embodiments of the present application will be described below with reference to the accompanying drawings. Figures 1 to 5

[0048] As shown in Figures 1 to 5 , a structural schematic diagram of the rotor assembly 100 according to an embodiment of the present application is shown in FIG. 1; Figure 1 As shown in Figure 2 , a structural schematic diagram of the rotor assembly 100 according to an embodiment of the present application is shown in FIG. 2; Figure 3 As shown in Figure 1 , a structural schematic diagram of the balancing assembly 120 in the rotor assembly 100 according to an embodiment of the present application is shown in FIG. 3; Figure 4 As shown in Figure 1 , a structural schematic diagram of the balancing assembly 120 in the rotor assembly 100 according to an embodiment of the present application is shown in FIG. 4; Figure 5 As shown in , a structural schematic diagram of the refrigeration device 400 according to an embodiment of the present application is shown in FIG. 5. The rotor assembly 100 according to an embodiment of the present application comprises: a rotor 110; a balancing assembly 120 arranged on an end surface of the rotor 110 and arranged circumferentially along the end surface of the rotor 110; the balancing assembly 120 comprises a first counterweight 122, a second counterweight 124 and a third counterweight 126, the first counterweight 122, the second counterweight 124 and the third counterweight 126 are arranged at intervals, and the second counterweight 124 is located between the first counterweight 122 and the third counterweight 126; wherein the second counterweight 124 and the first counterweight 122 enclose a first oil return passage 130, the second counterweight 124 and the third counterweight 126 enclose a second oil return passage 140, and the first oil return passage 130 and the second oil return passage 140 are used for draining oil on the end surface of the rotor 110.

[0049] Figure 1 In particular, as shown in Figure 2 ​As shown, the rotor assembly 100 includes a rotor 110 and a balancing assembly 120. Among them, the balancing assembly 120 is arranged on the end face of the rotor 110, and is arranged circumferentially along the end face of the rotor 110, that is, the balancing assembly 120 is fixed on the end face of the two ends of the rotor 110, and is arranged and distributed circumferentially along the end face of the rotor 110, so as to realize the counterweight of the rotor 110. The balancing assembly 120 is used to balance the centrifugal force of the eccentric shaft in the motor 200, and reduce the shaking of the eccentric shaft during rotation. In addition, the balancing assembly 120 includes a first counterweight 122, a second counterweight 124 and a third counterweight 126, the first counterweight 122, the second counterweight 124 and the third counterweight 126 are arranged circumferentially along the end face of the rotor 110, and the first counterweight 122, the second counterweight 124 and the third counterweight 126 are arranged at intervals, that is, the first counterweight 122, the second counterweight 124 and the third counterweight 126 have a spacing between each other, and the second counterweight 124 is located between the first counterweight 122 and the third counterweight 126; wherein the second counterweight 124 and the first counterweight 122 form a first oil return channel 130, that is, the gap between the second counterweight 124 and the first counterweight 122 forms the first oil return channel 130, and the second counterweight 124 and the third counterweight 126 form a second oil return channel 140, that is, the gap between the second counterweight 124 and the third counterweight 126 forms the second oil return channel 140, and the first oil return channel 130 and the second oil return channel 140 are used to drain the oil on the end face of the rotor 110.

[0050] By designing the balancing assembly 120 in a split body, and forming a matching gap or spacing between the second counterweight 124 and the first counterweight 122, and between the second counterweight 124 and the third counterweight 126, the matching gap can be used as an oil guide channel, ensuring that the lubricating oil accumulated on the upper part of the stator flows to the inside of the rotor assembly 100 through the gap or spacing between the second counterweight 124 and the first counterweight 122, and the gap or spacing between the second counterweight 124 and the third counterweight 126, so that the lubricating oil accumulated on the upper part of the stator flows back to the lower oil pool of the motor 200, to form a good oil circuit circulation. Thus, on the basis of realizing the counterweight function, the balancing assembly 120 can improve the problem of poor oil circuit circulation in the compressor 300. Improve the working efficiency and stability of the compressor 300.

[0051] Specifically, in the related art, in order to reduce the shaking of the eccentric shaft during operation, a counterweight is usually arranged at the end of the rotor to balance the centrifugal force of the eccentric shaft. However, if the counterweight is designed as a whole or is not reasonably designed, it will cause large wind resistance and weight of the counterweight, and cause part of the lubricating oil to accumulate on the upper part of the stator and be difficult to return to the lower oil pool, resulting in that the motor cannot form a good oil circuit circulation.

[0052] The present application is directed to this problem, as shown in Figure 1 and Figure 2 The balancing assembly 120 is split into the first counterweight 122, the second counterweight 124, and the third counterweight 126, and the first counterweight 122, the second counterweight 124, and the third counterweight 126 are spaced apart on the end face of the end portion of the rotor 110, that is, there is a gap between the second counterweight 124 and the first counterweight 122, and there is a gap between the second counterweight 124 and the third counterweight 126, the gap between the second counterweight 124 and the first counterweight 122 forms the first oil return channel 130, and the gap between the second counterweight 124 and the third counterweight 126 forms the second oil return channel 140. In this way, by splitting the balancing assembly 120, not only is the eccentric shaft centrifugal force balanced, reducing the swing and reducing the vibration noise, but also by using the first oil return channel 130 and the second oil return channel 140 formed between the first counterweight 122, the second counterweight 124, and the third counterweight 126, the lubricating oil accumulated on the upper portion of the stator can smoothly flow through the first oil return channel 130 and the second oil return channel 140 to the inside of the rotor assembly 100, and finally return to the oil pool at the lower portion of the motor 200. In this way, a good oil circulation can be formed inside the motor 200, avoiding the problem of lubricating oil accumulation on the upper portion of the stator. By splitting the balancing assembly 120 and using the gap between the counterweights to form the oil return channel, the effective drainage of the lubricating oil is achieved. By splitting the balancing assembly 120, not only is the eccentric shaft centrifugal force balanced, reducing the swing and reducing the vibration noise, but also the problem of poor oil circulation inside the compressor 300 is improved, improving the working efficiency and stability of the compressor 300.

[0053] Specifically, in traditional rotor assemblies, the balancing assembly is often designed as a whole, and the whole design of the balancing assembly has large wind resistance, large weight, and easily hinders the circulation of lubricating oil. The balancing assembly 120 of the present application is split into the first counterweight 122, the second counterweight 124, and the third counterweight 126, and the first counterweight 122, the second counterweight 124, and the third counterweight 126 are spaced apart, and the gap between the first counterweight 122, the second counterweight 124, and the third counterweight 126 is used to return oil, not only achieving the balance of the eccentric shaft centrifugal force and reducing the swing, but also improving the problem of poor oil circulation inside the compressor 300, improving the working efficiency and stability of the compressor 300.

[0054] In addition, the rotor assembly 100 of the present application also has the advantages of simple structure, easy manufacturing and maintenance, etc. Since the balancing assembly 120 is split, the size and shape of each counterweight can be adjusted according to actual needs to adapt to different working conditions and requirements. At the same time, the split design of the balancing assembly 120 also facilitates subsequent maintenance and replacement work, reducing maintenance costs.

[0055] Specifically, taking the K series 12S8P model and the N series 9S6P model as examples, for the K series 12S8P model, the oil accumulation problem often occurs in this model, when setting the balance assembly 120, the second counterweight 124 located in the middle position is set to a square shape, and the first counterweight 122 and the third counterweight 126 located on both sides are set to a crescent shape. The first counterweight 122 and the third counterweight 126 located on both sides can be set as standard parts, and the size remains unchanged. Only the size of the second counterweight 124 in the middle position is changed. Since only the second counterweight 124 in the middle position and the middle rivet are changed in design, the standardization design can be greatly improved, and the manufacturing cost and the part code can be reduced. Importantly, by changing the size of the second counterweight 124, the oil guide path width is widened, and it is ensured that the oil can smoothly flow back to the oil pool from the upper part of the stator through the oil guide channel, thereby avoiding oil accumulation and improving the operating efficiency of the compressor 300.

[0056] Specifically, for the N series 9S6P model, due to the large wind resistance and weight of the balance block, there is a problem of poor oil circulation. When setting the balance assembly 120, the first counterweight 122 and the third counterweight 126 are set to a crescent shape. The counterweight in a crescent shape adopts a streamlined design, which can reduce wind resistance. At the same time, the second counterweight 124 is set to form a first oil return channel 130 and a second oil return channel 140 to maintain the stability of the flow field at the lower part of the motor 200 and promote good oil circulation.

[0057] Moreover, while keeping the density of each counterweight unchanged, by adjusting the size of the second counterweight 124 in the middle position, the dynamic and static balance coefficient is optimized, the noise and vibration are reduced, and the situation of introducing new rivets and other materials due to height changes is avoided, thereby reducing the production cost and the complexity of material management. The counterweight design for oil path improvement of the compressor 300 of the present application effectively solves the problems of oil accumulation, poor oil circulation, noise and vibration in the prior art by dividing the balance assembly 120 into parts, and improves the design flexibility and cost-effectiveness. In addition, the material of the balance assembly 120 can be a fixed material, including metal, ceramic, and metal mixture, which will not be listed here.

[0058] In some embodiments, as shown in Figure 2 , Figure 3 and Figure 4 , a cross section along the radial direction of the rotor 110 is taken, and in the radial cross section of the rotor 110, the minimum width of the first oil return channel 130 is L1, and the minimum width of the second oil return channel 140 is L2, wherein 1mm≤L1≤3mm and 1mm≤L2≤3mm.

[0059] Specifically, as shown in Figure 2 ,Figure 3 and Figure 4 As shown, a cross-section is taken along the radial direction of the rotor 110. Within this radial cross-section, the minimum width of the first oil return channel 130 is L1, and the minimum width of the second oil return channel 140 is L2. To ensure that the lubricating oil can flow smoothly through the first and second oil return channels 130 and 140, while avoiding excessive widths in these channels that could reduce the structural strength of the balancing assembly 120, a reasonable width range is set. Specifically, L1 and L2 are set to satisfy: 1mm ≤ L1 ≤ 3mm, 1mm ≤ L2 ≤ 3mm. This width design ensures both sufficient oil guiding capacity and the overall structural strength of the balancing assembly 120, enabling the rotor assembly 100 to maintain stability and reliability during high-speed rotation.

[0060] Specifically, such as Figure 3 and Figure 4 As shown, by precisely controlling the widths of the first return oil channel 130 and the second return oil channel 140, the flow path and speed of the lubricating oil can be further optimized. Narrower channels can increase the flow rate of the lubricating oil, thereby improving its return efficiency; while an appropriate width range can avoid the risk of blockage caused by excessively narrow channels, and prevent oil loss and increased energy consumption caused by excessively wide first and second return oil channels 130 and 140. Specifically, when L1 and L2 are both within the range of 1mm to 3mm, the widths L1 and L2 of the first and second return oil channels 130 and 140 can be set to 1mm, 2mm, 2.5mm, or 3mm, respectively. This allows the lubricating oil to be more evenly distributed on the end face of the rotor 110 and smoothly return to the oil sump at the bottom of the motor 200 through the return oil channels. This not only reduces the accumulation and waste of lubricating oil but also improves the oil circulation efficiency inside the motor 200, thereby extending the service life of the motor 200 and reducing maintenance costs.

[0061] Furthermore, the width design of the first oil return channel 130 and the second oil return channel 140 can be combined with other technical features, such as adjusting the material, shape, and density of the counterweight, to further optimize the performance of the rotor assembly 100. For example, by selecting appropriate materials to reduce the wind resistance and weight of the counterweight, or by adjusting the shape of the counterweight to better adapt to the internal structure of the motor 200, the efficiency and stability of the rotor assembly 100 can be further improved.

[0062] In some embodiments, optionally, such as Figure 3 and Figure 4 As shown, the size of the second counterweight 124 is adjustable, so that the minimum width L1 of the first oil return channel 130 and the minimum width L2 of the second oil return channel 140 can be changed by adjusting the size of the second counterweight 124.

[0063] Specifically, as shown in Figure 3 and Figure 4 , the size of the second counterweight 124 can be adjusted, i.e., the second counterweight 124 can be resized, by adjusting the size of the second counterweight 124, the minimum width L1 of the first oil return channel 130 and the minimum width L2 of the second oil return channel 140 are changed, and by changing the width of the first oil return channel 130 and the width of the second oil return channel 140, the flow rate and pressure of the lubricating oil in the two channels can be changed, thereby ensuring that the lubricating oil can flow smoothly through the first oil return channel 130 and the second oil return channel 140, so that the lubricating oil can better cool and lubricate the rotor assembly 100, improving the operating efficiency and stability of the motor 200.

[0064] In some embodiments, optionally, as shown in Figure 3 and Figure 4 , the width of the first oil return channel 130 is the same as the width of the second oil return channel 140, or the width of the first oil return channel 130 is different from the width of the second oil return channel 140.

[0065] Specifically, as shown in Figure 3 and Figure 4 , by setting the width of the first oil return channel 130 to be the same as the width of the second oil return channel 140, it can be ensured that the flow rate and pressure distribution of the lubricating oil in the two channels are more uniform, thereby avoiding the phenomenon of oil flow deviation or local blockage caused by the difference in channel width. Such uniformly distributed lubricating oil can better cool and lubricate the rotor assembly 100, improving the operating efficiency and stability of the motor 200.

[0066] By setting the width of the first oil return channel 130 to be different from the width of the second oil return channel 140, the oil guiding capacity of the two channels can be adjusted according to actual needs. For example, in some areas of the rotor assembly 100, more lubricating oil may be needed for cooling and lubrication, at which time the width of the oil return channel in that area can be appropriately increased. While in other areas, if the demand for lubricating oil is less, the width of the oil return channel can be appropriately reduced to reduce oil waste and energy consumption.

[0067] Specifically, when designing the rotor assembly 100, the widths of the first oil return channel 130 and the second oil return channel 140 can be determined by comprehensively considering factors such as the operating conditions of the motor 200, the structural characteristics of the rotor assembly 100, and the flow characteristics of the lubricating oil. Through simulation analysis and experimental verification, the width design of these two channels can be further optimized to achieve more efficient oil circulation while meeting the performance requirements of the motor 200. Furthermore, the width design of the oil return channels can be combined with other technical features, such as adjusting the shape, number, and position of the oil return channels, to further optimize the lubrication circuit of the rotor assembly 100. By setting the widths of the first oil return channel 130 and the second oil return channel 140 to be the same or different, more options are provided for optimizing the lubrication circuit of the rotor assembly 100, contributing to more efficient, stable, and reliable operation of the motor 200.

[0068] In some embodiments, optionally, such as Figure 2 As shown, the rotor assembly 100 also includes a rotor core 112, which is inserted into the rotor 110. The rotor core 112 is provided with an oil return hole 114. The oil on the end face of the rotor 110 flows back to the interior of the rotor assembly 100 through the first oil return channel 130 and the second oil return channel 140.

[0069] Specifically, such as Figure 2 As shown, the rotor assembly 100 also includes a rotor core 112, which passes through the rotor 110 bore inside the rotor 110. By providing an oil return hole 114 on the rotor core 112, the oil return hole 114 can communicate with the first oil return channel 130 and the second oil return channel 140, forming a lubricating oil return loop. When oil accumulates on the end face of the rotor 110, it can be guided by the first oil return channel 130 and the second oil return channel 140, and then flow smoothly into the oil return hole 114 on the rotor core 112, thus returning to the interior of the rotor assembly 100, achieving oil recycling.

[0070] Specifically, the oil return hole 114 can be arranged as a waist-shaped hole on the rotor core 112, such as near the edge of the end face of the rotor 110, so as to better receive the oil flowing from the first oil return channel 130 and the second oil return channel 140. In addition, in order to further improve the efficiency of the lubricating oil circuit, the shape of the oil return hole 114 can also be optimized. For example, the oil return hole 114 can be designed in a conical or trumpet shape, so as to better guide the oil flow and reduce the resistance in the flow process. At the same time, some flow guide structures such as flow guide grooves or flow guide fins can also be arranged inside the oil return hole 114 to further improve the flow state of the oil. By arranging the oil return hole 114 on the rotor core 112 and cooperating with the first oil return channel 130 and the second oil return channel 140, a lubricating oil return circuit is formed, which not only improves the return efficiency of the oil, but also realizes the recycling of the oil, which helps to reduce the energy consumption of the motor 200 and prolong the service life. At the same time, by optimizing the design of the oil return hole 114, the efficiency of the lubricating oil circuit can be further improved, providing more reliable protection for the stable operation of the motor 200.

[0071] In some embodiments, as shown in Figure 2 , the number of oil return holes 114 is multiple, and the multiple oil return holes 114 are uniformly distributed on the rotor core 112 and arranged circumferentially along the end face of the rotor core 112.

[0072] Specifically, as shown in Figure 2 , the number of oil return holes 114 is multiple, and the multiple oil return holes 114 are uniformly distributed on the rotor core 112 and arranged circumferentially along the end face of the rotor core 112. In this way, not only the return efficiency of the lubricating oil is improved, but also the uniform distribution of the oil on the rotor core 112 is ensured, avoiding local oil accumulation.

[0073] Specifically, as shown in Figure 2 , the number of oil return holes 114 can be set to 6, and can be set to 8 or 10 according to actual needs, etc., which are not listed here. The arrangement of multiple oil return holes 114 enables the lubricating oil to flow into the interior of the rotor core 112 through the first oil return channel 130 and the second oil return channel 140 more quickly. Since the oil return holes 114 are arranged circumferentially along the end face of the rotor core 112, the oil can more uniformly cover the entire end face of the rotor core 112 during the flow process, thereby improving the cooling and lubricating effect.

[0074] In some embodiments, as shown in Figure 2 and Figure 3As shown, the balancing assembly 120 is provided with positioning holes 128, which are respectively formed on the first counterweight 122, the second counterweight 124 and the third counterweight 126, for fixing and positioning the first counterweight 122, the second counterweight 124 and the third counterweight 126.

[0075] Specifically, as shown in Figure 2 and Figure 3 , the positioning holes 128 are provided on the balancing assembly 120, and are respectively formed on the first counterweight 122, the second counterweight 124 and the third counterweight 126. The main function of the positioning holes 128 is to ensure the accurate positioning and fixing of the first counterweight 122, the second counterweight 124 and the third counterweight 126 in the rotor assembly 100, so as to maintain the dynamic balance of the rotor assembly 100 during high-speed rotation, and reduce vibration and noise caused by improper installation.

[0076] Specifically, as shown in Figure 2 and Figure 3 , the positioning holes 128 can be designed as cylindrical, conical or other suitable shapes to meet the installation requirements of different counterweights. The diameter of the positioning holes 128 can be set to 5mm or 6mm, and the diameter of the rivets used for fixing can be set to 4mm or 5mm. At the same time, the depth of the positioning holes 128 can also be adjusted according to the thickness and material of the counterweights, so as to ensure that the counterweights can be completely embedded and tightly fitted on the rotor assembly 100. By providing the positioning holes 128 on the balancing assembly 120 and setting the position, number and size of the positioning holes 128, the accurate positioning and fixing of the first counterweight 122, the second counterweight 124 and the third counterweight 126 can be realized. The dynamic balance performance of the rotor assembly 100 is improved, and the stability and reliability of the motor 200 during high-speed operation are ensured.

[0077] In some embodiments, as shown in Figure 1 , the number of balancing assemblies 120 is two, and the two balancing assemblies 120 are respectively arranged at the two ends of the rotor 110, and the installation positions of the two balancing assemblies 120 at the two ends of the rotor 110 are distributed in a staggered manner.

[0078] Specifically, as shown in Figure 1As shown, the number of balance assemblies 120 is set to two groups, and the two groups of balance assemblies 120 are respectively arranged at the two ends of the rotor 110. Moreover, the mounting positions of the two groups of balance assemblies 120 at the two ends of the rotor 110 are not completely corresponding, but are staggered. Such arrangement not only further improves the balance performance of the rotor assembly 100, but also helps to reduce the vibration and noise of the motor 200 when rotating at high speed. At the same time, since the mounting positions of the two groups of balance assemblies 120 at the two ends of the rotor 110 are staggered, the lubricating oil can flow into the inside of the rotor core 112 through the first oil return channel 130 and the second oil return channel 140 quickly, improving the oil return efficiency of the lubricating oil circuit.

[0079] Specifically, the staggered distribution can be understood as that one group of balance assemblies 120 is arranged on the left end face of the top of the rotor 110, and the other group of balance assemblies 120 is arranged on the right end face of the bottom of the rotor 110. For example, one group of balance assemblies 120 can be mounted on one end face of the rotor 110, and the other group of balance assemblies 120 can be mounted on the other end face of the rotor 110, but the mounting positions of the two are staggered by a certain angle in the circumferential direction. In this way, when the rotor 110 rotates at high speed, the balance performance of the rotor assembly 100 can be improved, and the vibration and noise of the motor 200 when rotating at high speed can be reduced. At the same time, the lubricating oil can flow into the inside of the rotor core 112 through the first oil return channel 130 and the second oil return channel 140 quickly, improving the oil return efficiency of the lubricating oil circuit.

[0080] In some embodiments, optionally, as shown in the drawings, Figure 2 In the radial cross section of the rotor, the projection of the balance assembly on the cross section is located within the projection of the rotor on the cross section.

[0081] Specifically, as shown in the drawings, Figure 2 In the radial cross section of the rotor 110, the projection of the balance assembly 120 on the cross section is located within the projection of the rotor 110 on the cross section, that is, the outer diameter of the balance assembly 120 is smaller than the outer diameter of the rotor 110. It can also be understood that the outer diameter of the balance assembly 120 is smaller than the outer diameter of the rotor 110, so that the outer size of the balance assembly 120 does not exceed the outer circumferential surface of the rotor 110, so as not to increase the overall diameter of the motor 200. This helps to reduce the wind resistance and energy consumption of the motor 200 when rotating at high speed, and facilitates the compactness and lightweight design of the motor 200.

[0082] According to a second aspect of the present application, as shown in the drawings, Figure 5 A motor 200 is also provided, which comprises: a rotor assembly 100 as in the above embodiments, and a stator assembly 210, the stator assembly 210 being sleeved on the rotor assembly 100; a housing 220, the stator assembly 210 and the rotor assembly 100 being arranged in the housing 220.

[0083] The motor 200 provided in this application includes the rotor assembly 100 of the above embodiments, and therefore has all the beneficial effects of the rotor assembly 100, which will not be repeated here.

[0084] In addition, such as Figure 5 As shown, the motor 200 also includes a stator assembly 210 and a housing 220. The stator assembly 210 is sleeved on the rotor assembly 100, and the stator assembly 210 and the rotor assembly 100 are disposed within the housing 220. The housing 220, as the external protective structure of the motor 200, not only provides necessary mechanical support but also serves as protection and heat dissipation.

[0085] According to the third aspect of this application, such as Figure 5 As shown, a compressor 300 is also proposed, including a motor 200 as described in the above embodiment.

[0086] The compressor 300 provided in this application includes the motor 200 of the above embodiments, and therefore has all the beneficial effects of the motor 200, which will not be repeated here. Specifically, the compressor 300 can be specifically configured as a rotary compressor 300.

[0087] According to the fourth aspect of this application, such as Figure 5 As shown, a refrigeration device 400 is also proposed, including: a compressor 300 as described in the above embodiment.

[0088] The refrigeration equipment 400 provided in this application includes the compressor 300 of the above embodiment, and therefore has all the beneficial effects of the compressor 300, which will not be repeated here.

[0089] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0090] In the description of the application, the terms "one embodiment", "some embodiments", "certain embodiments", etc. do not necessarily refer to the same embodiment or example, but instead can refer to different embodiments or examples. Furthermore, the described

[0091] The above only is the preferred embodiment of the present application, and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotor assembly, characterized in that, include: Rotor; A balancing assembly is disposed on the end face of the rotor and is arranged circumferentially along the end face of the rotor; The balancing component includes a first counterweight, a second counterweight, and a third counterweight, which are spaced apart from each other, with the second counterweight located between the first and third counterweights. The second counterweight and the first counterweight form a first oil return channel, and the second counterweight and the third counterweight form a second oil return channel. The first oil return channel and the second oil return channel are used to guide the oil on the rotor end face.

2. The rotor assembly according to claim 1, characterized in that, A cross-section is taken along the radial direction of the rotor. Within the radial cross-section of the rotor, the minimum width of the first oil return channel is L1, and the minimum width of the second oil return channel is L2, wherein 1mm≤L1≤3mm and 1mm≤L2≤3mm.

3. The rotor assembly according to claim 2, characterized in that, The size of the second counterweight is adjustable so that the minimum width L1 of the first oil return channel and the minimum width L2 of the second oil return channel can be changed by adjusting the size of the second counterweight.

4. The rotor assembly according to claim 1, characterized in that, The rotor assembly also includes a rotor core, which is inserted inside the rotor. The rotor core is provided with an oil return hole. The oil on the rotor end face flows back to the interior of the rotor assembly through the oil return hole via the first oil return channel and the second oil return channel.

5. The rotor assembly according to claim 4, characterized in that, The number of oil return holes is multiple, and the multiple oil return holes are evenly distributed on the rotor core and are distributed circumferentially along the end face of the rotor core.

6. The rotor assembly according to claim 1, characterized in that, The balancing component is provided with positioning holes, which are respectively opened on the first counterweight, the second counterweight and the third counterweight, for fixing and positioning the first counterweight, the second counterweight and the third counterweight.

7. The rotor assembly according to any one of claims 1 to 6, characterized in that, The number of balancing components is two sets, and the two sets of balancing components are respectively disposed at both ends of the rotor, and the installation positions of the two sets of balancing components at both ends of the rotor are staggered.

8. The rotor assembly according to any one of claims 1 to 6, characterized in that, A cross-section is taken along the radial direction of the rotor, and within the cross-section along the radial direction of the rotor, the projection of the balancing assembly on the cross-section lies within the projection of the rotor on the cross-section.

9. An electric motor, characterized in that, Including the rotor assembly as described in any one of claims 1 to 8, and A stator assembly, which is sleeved on the rotor assembly; The housing, in which the stator assembly and the rotor assembly are disposed.

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

11. A refrigeration device, characterized in that, Includes the compressor as described in claim 10.

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