Rotor assembly, motor, compressor and refrigeration equipment

Abstract

The invention relates to the technical field of motors, and provides a rotor assembly, a motor, a compressor and refrigeration equipment. The balance assembly is arranged on the end face of the rotor and arranged in the circumferential direction of the end face of the rotor; the balancing assembly comprises a first balancing weight, a second balancing weight and a third balancing weight, the first balancing weight, the second balancing weight and the third balancing weight are arranged at intervals, and the second balancing weight is located between the first balancing weight and the third balancing weight; wherein a first oil return channel is defined between the second balancing weight and the first balancing weight, a second oil return channel is defined between the second balancing weight and the third balancing weight, and the first oil return channel and the second oil return channel are used for draining oil on the end face of the rotor. The balance assembly is designed in a split mode, the fit clearance formed between the balancing weights can serve as an oil guiding channel, lubricating oil accumulated on the upper portion of the stator flows back to an oil pool on the lower portion of the motor, and therefore good oil way circulation is formed.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a rotor assembly, a motor, a compressor and a refrigeration device. Background Art

[0002] At present, in order to reduce the swing of the eccentric shaft, the rotary compressor in the related technology usually sets a counterweight at the end of the rotor to balance the centrifugal force of the eccentric shaft. However, the unreasonable design of the counterweight leads to large wind resistance and heavy weight of the counterweight, causing part of the lubricating oil to accumulate in the upper part of the stator and difficult to return to the lower oil pool, resulting in a poor oil circulation inside the motor. Summary of the invention

[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 is accumulated in the upper part of the stator and is difficult to return to the oil pool in the lower part of the motor, resulting in the inability to form a good oil circulation inside the motor.

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

[0005] A second aspect of the present application provides an electric motor.

[0006] A third aspect of the present application provides a compressor.

[0007] A fourth aspect of the present application provides a refrigeration device.

[0008] In view of this, the present application provides a rotor assembly, comprising: a rotor; a balancing assembly, arranged on the end face of the rotor and arranged circumferentially along the end face of the rotor; 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 at intervals, and the second counterweight block is located between the first counterweight block and the third counterweight block; wherein the second counterweight block and the first counterweight block enclose a first oil return channel, and the second counterweight block and the third counterweight block enclose a second oil return channel, and the first oil return channel and the second oil return channel are used to drain the oil on the end face of the rotor.

[0009] The rotor assembly provided in the present application includes a rotor and a balancing assembly. The balancing assembly is arranged on the end face of the rotor and arranged along the circumference of the end face of the rotor, that is, the balancing assembly is fixed on the end faces of both ends of the rotor and arranged and distributed along the circumference of the end face of the rotor to achieve weighting of the rotor. The balancing assembly is used to balance the centrifugal force of the eccentric shaft in the motor and reduce the shaking of the eccentric shaft during rotation. In addition, the balancing assembly includes a first counterweight, a second counterweight and a third counterweight, and the first counterweight, the second counterweight and the third counterweight are arranged circumferentially along the end face of the rotor, and are spaced apart from each other, that is, there is a spacing between the first counterweight, the second counterweight and the third counterweight, and the second counterweight is located between the first counterweight and the third counterweight; wherein, the second counterweight and the first counterweight are enclosed to form a first oil return channel, that is, the gap between the second counterweight and the first counterweight forms the first oil return channel, and the second counterweight and the third counterweight are enclosed to form a second oil return channel, that is, the gap between the second counterweight and the third counterweight forms the second oil return channel, and the first oil return channel and the second oil return channel are used to drain the oil on the end face of the rotor.

[0010] By splitting the balancing assembly into two parts, and forming a matching gap or spacing between the second balancing weight and the first balancing weight, and between the second balancing weight and the third balancing weight, the matching gap can be used as an oil-guiding channel to ensure that the lubricating oil accumulated on the upper part of the stator flows into the inside of the rotor assembly through the gap or spacing between the second balancing weight and the first balancing weight, and the gap or spacing between the second balancing weight and the third balancing weight, so that the lubricating oil accumulated on the upper part of the stator flows back to the oil pool at the bottom of the motor to form a good oil circuit circulation. In this way, the balancing assembly can improve the problem of poor oil return circulation in the internal oil circuit of the compressor on the basis of realizing the counterweight function, thereby improving the working efficiency and stability of the compressor.

[0011] The rotor assembly according to the above technical solution of the present application may also have the following additional technical features:

[0012] In some technical solutions, optionally, a section is made along the radial direction of the rotor, and in the radial 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.

[0013] In this technical solution, a section is made along the radial direction of the rotor. In the radial 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, and to avoid the first oil return channel and the second oil return channel being too wide, which would cause the structural strength of the balancing assembly to decrease, a reasonable width range is set. Specifically, L1 and L2 are set to meet the following conditions: 1mm≤L1≤3mm, 1mm≤L2≤3mm. Such a width design ensures both sufficient oil conduction capacity and the overall structural strength of the balancing 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 block is adjustable, so as 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 block.

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

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

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

[0018] By setting the width of the first oil return channel to be different from the width of the second oil return channel, the oil conduction capacity of the two channels can be adjusted according to actual needs. For example, in certain areas of the rotor assembly, more lubricating oil may be required for cooling and lubrication, and the width of the oil return channel in this area can be appropriately increased. 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.

[0019] In some technical schemes, optionally, the rotor assembly also includes a rotor core, which is inserted into the rotor. An oil return hole is provided on the rotor core, and the oil on the rotor end face is guided by the first oil return channel and the second oil return channel, and flows back to the interior of the rotor assembly through the oil return hole.

[0020] In this technical solution, the rotor assembly also includes a rotor core, which is inserted into the rotor hole inside the rotor. By setting an oil return hole on the rotor core, the oil return hole can be connected with the first oil return channel and the second oil return channel, forming a lubricating oil return circuit. When the oil on the rotor end face gathers, the oil can flow smoothly into the oil return hole on the rotor core through the drainage effect of the first oil return channel and the second oil return channel, and then flow back to the inside of the rotor assembly, realizing the recycling of the oil.

[0021] In some technical solutions, optionally, there are multiple oil return holes, and the multiple oil return holes are evenly distributed on the rotor core and distributed circumferentially along the end surface of the rotor core.

[0022] In this technical solution, the number of oil return holes is set to be multiple, and the multiple oil return holes are evenly distributed on the rotor core and arranged circumferentially along the end surface of the rotor core. This not only improves the return efficiency of the lubricating oil, but also ensures the uniform distribution of the oil on the rotor core and avoids local oil accumulation.

[0023] In some technical solutions, optionally, positioning holes are provided on the balancing assembly, and the positioning holes are respectively opened on the first counterweight block, the second counterweight block and the third counterweight block, for fixing and positioning the first counterweight block, the second counterweight block and the third counterweight block.

[0024] In this technical solution, positioning holes are provided on the balancing assembly, and the positioning holes are respectively opened on the first counterweight block, the second counterweight block and the third counterweight block. The main function of the positioning holes is to ensure the accurate positioning and fixation of the first counterweight block, the second counterweight block and the third counterweight block in the rotor assembly, thereby maintaining the dynamic balance of the rotor assembly during high-speed rotation and reducing vibration and noise caused by improper installation.

[0025] In some technical solutions, optionally, there are two groups of balancing components, the two groups of balancing components are respectively arranged at two ends of the rotor, and the installation positions of the two groups of balancing components at the two ends of the rotor are staggered.

[0026] In this technical solution, the number of balancing components is set to two groups, and the two groups of balancing components are respectively arranged at the two ends of the rotor. Moreover, the installation positions of the two groups of balancing components at the two ends of the rotor are not completely corresponding, but are staggered. Such a setting not only further improves the balancing performance of the rotor assembly, but also helps to reduce the vibration and noise of the motor when rotating at high speed. At the same time, since the installation positions of the two groups of balancing components at the two ends of the rotor are staggered, it is conducive to the lubricating oil to quickly flow into the rotor core through the first oil return channel and the second oil return channel, thereby improving the oil return efficiency of the lubricating oil circuit.

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

[0028] In this technical solution, in the radial section of the rotor, the projection of the balancing component on the section is set to be within the projection of the rotor on the section, that is, the outer contour size of the balancing component is smaller than the outer diameter of the rotor, which can also be understood as the outer diameter of the balancing component is smaller than the outer diameter of the rotor, so that the outer dimensions of the balancing component do not exceed the outer peripheral surface of the rotor, which will not increase the overall diameter of the motor. This helps to reduce the wind resistance and energy consumption of the motor when it rotates at high speed, and facilitates the compactness and lightweight design of the motor.

[0029] According to the second aspect of the present application, a motor is also proposed, comprising: a rotor assembly as in the above scheme, and a stator assembly, wherein the stator assembly is sleeved on the rotor assembly; and a casing, wherein the stator assembly and the rotor assembly are arranged in the casing.

[0030] The motor provided in the present application includes the rotor assembly of the above technical solution, and therefore has all the beneficial effects of the rotor assembly, which will not be described in detail here.

[0031] In addition, the motor also includes a stator assembly and a housing, wherein the stator assembly is sleeved on the rotor assembly, and the stator assembly and the rotor assembly are arranged in the housing. As the external protective structure of the motor, the housing not only provides the necessary mechanical support, but also plays a role in protection and heat dissipation.

[0032] According to a third aspect of the present application, a compressor is also proposed, comprising: a motor as in the above solution.

[0033] The compressor provided in the present application includes the motor of the above-mentioned technical solution, and therefore has all the beneficial effects of the motor, which will not be described in detail here.

[0034] According to a fourth aspect of the present application, a refrigeration device is also proposed, comprising: a compressor as in the above solution.

[0035] The refrigeration equipment provided in the present application includes the compressor of the above technical solution, and therefore has all the beneficial effects of the compressor, which will not be described in detail here.

[0036] Additional aspects and advantages of the present application will become apparent in the following description or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 This is a schematic structural diagram of a rotor assembly according to an embodiment of the present application;

[0039] Figure 2 A schematic structural diagram of a rotor assembly from another perspective of an embodiment of the present application;

[0040] Figure 3 for Figure 1 A schematic diagram of the structure of a balancing assembly in a rotor assembly of the illustrated embodiment;

[0041] Figure 4 for Figure 1 A schematic structural diagram of a balancing assembly in a rotor assembly of the illustrated embodiment from another perspective;

[0042] Figure 5 This is a schematic structural diagram of a refrigeration device according to an embodiment of the present application.

[0043] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0044] 100 rotor assembly, 110 rotor, 112 rotor core, 114 oil return hole, 120 balance assembly, 122 first counterweight block, 124 second counterweight block, 126 third counterweight block, 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 more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present 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 to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0047] Refer to the following Figures 1 to 5 The rotor assembly 100, the motor 200, the compressor 300 and the refrigeration device 400 provided according to some embodiments of the present application are described.

[0048] like Figures 1 to 5 As shown, Figure 1 This is a schematic structural diagram of a rotor assembly 100 according to an embodiment of the present application; Figure 2 A schematic structural diagram of a rotor assembly 100 from another perspective of an embodiment of the present application; Figure 3 for Figure 1 A schematic structural diagram of a balancing assembly 120 in a rotor assembly 100 of the illustrated embodiment; Figure 4 for Figure 1 A schematic structural diagram of the balancing assembly 120 in the rotor assembly 100 of the illustrated embodiment from another perspective; Figure 5 The structure diagram of the refrigeration equipment 400 of one embodiment of the present application. The rotor assembly 100 provided by one embodiment of the present application includes: a rotor 110; a balancing assembly 120, which is arranged on the end face of the rotor 110 and is arranged circumferentially along the end face of the rotor 110; the balancing assembly 120 includes a first balancing weight 122, a second balancing weight 124 and a third balancing weight 126, and the first balancing weight 122, the second balancing weight 124 and the third balancing weight 126 are arranged at intervals, and the second balancing weight 124 is located between the first balancing weight 122 and the third balancing weight 126; wherein the second balancing weight 124 and the first balancing weight 122 enclose a first oil return channel 130, and the second balancing weight 124 and the third balancing weight 126 enclose a 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.

[0049] Specifically, Figure 1 and Figure 2As shown, the rotor assembly 100 includes a rotor 110 and a balancing assembly 120. The balancing assembly 120 is arranged on the end surface of the rotor 110 and is arranged circumferentially along the end surface of the rotor 110, that is, the balancing assembly 120 is fixed on the end surfaces at both ends of the rotor 110 and is arranged and distributed circumferentially along the end surface of the rotor 110, so as to achieve the weighting 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 balancing weight 122, a second balancing weight 124, and a third balancing weight 126. The first balancing weight 122, the second balancing weight 124, and the third balancing weight 126 are arranged along the circumferential direction of the end surface of the rotor 110. The first balancing weight 122, the second balancing weight 124, and the third balancing weight 126 are arranged at intervals, that is, the first balancing weight 122, the second balancing weight 124, and the third balancing weight 126 have a spacing between each other, and the second balancing weight 124 is located between the first balancing weight 122 and the third balancing weight 126. Between; wherein, the second counterweight block 124 and the first counterweight block 122 enclose a first oil return channel 130, that is, the gap between the second counterweight block 124 and the first counterweight block 122 forms the first oil return channel 130, and the second counterweight block 124 and the third counterweight block 126 enclose a second oil return channel 140, that is, the gap between the second counterweight block 124 and the third counterweight block 126 forms the second oil return channel 140, 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 manner, 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-conducting channel to ensure 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. Thereby, the balancing assembly 120 can improve the problem of poor oil return circulation in the internal oil circuit of the compressor 300 on the basis of realizing the counterweight function, and 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 rotary compressor usually sets a counterweight at the end of the rotor to balance the centrifugal force of the eccentric shaft. However, if the overall design of the counterweight is unreasonable, the wind resistance and weight of the counterweight will be large, 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, resulting in a poor oil circulation inside the motor.

[0052] This application addresses this issue. Figure 1 and Figure 2 As shown, the balancing assembly 120 is divided into a first counterweight 122, a second counterweight 124 and a third counterweight 126, and the first counterweight 122, the second counterweight 124 and the third counterweight 126 are spaced apart on the end surface of the end 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 a first oil return channel 130, and the gap between the second counterweight 124 and the third counterweight 126 forms a second oil return channel 140. In this way, by splitting the balancing assembly 120, not only the balance of the centrifugal force of the eccentric shaft is achieved, the shaking is reduced, and the vibration noise is reduced, but also the first oil return channel 130 and the second oil return channel 140 formed between the first counterweight block 122, the second counterweight block 124 and the third counterweight block 126 are used, so that the lubricating oil accumulated on the upper part of the stator can smoothly pass through the first oil return channel 130 and the second oil return channel 140, flow to the inside of the rotor assembly 100, and finally return to the oil pool at the bottom of the motor 200. In this way, a good oil circuit circulation can be formed inside the motor 200, avoiding the problem that the lubricating oil is accumulated on the upper part of the stator and is difficult to return. The present application splits the balancing assembly 120 and forms the oil return channel by using the gap between each counterweight block, thereby achieving effective drainage of the lubricating oil. By splitting the balancing assembly 120, not only the balance of the centrifugal force of the eccentric shaft is achieved, the shaking is reduced, and the vibration noise is reduced, but also the problem of poor oil circuit circulation inside the compressor 300 is improved, and the working efficiency and stability of the compressor 300 are improved.

[0053] Specifically, in a traditional rotor assembly, the balancing assembly is often an integral design, and the integrally designed balancing assembly has large wind resistance, heavy counterweight, and is easy to hinder the circulation of lubricating oil. However, the balancing assembly 120 of the present application is designed by splitting, that is, the interval setting between the first counterweight block 122, the second counterweight block 124 and the third counterweight block 126, and the gap between the first counterweight block 122, the second counterweight block 124 and the third counterweight block 126 is used to realize oil return, which not only realizes the balance of the centrifugal force of the eccentric shaft and reduces the shaking, but also improves the problem of poor oil return circulation in the oil circuit of the compressor 300, thereby 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 a split design, 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 backlog problem often occurs in this model. When setting the balancing assembly 120, the second counterweight block 124 located in the middle position is set to a square shape, and the first counterweight block 122 and the third counterweight block 126 located on both sides are set to a crescent shape. The first counterweight block 122 and the third counterweight block 126 located on both sides can be set as standard parts, and the size remains unchanged. Only the size of the second counterweight block 124 in the middle position is changed. Since only the second counterweight block 124 in the middle position and the middle rivet are changed, the standardized design can be greatly improved, and the manufacturing cost and component coding can be reduced. It is important that by changing the size of the second counterweight block 124, the width of the oil guide path is widened to ensure 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 backlog and improving the operating efficiency of the compressor 300.

[0056] Specifically, for the N series 9S6P model, this model has a problem of poor oil circulation due to the large wind resistance and heavy counterweight of the balance block. When setting the balance assembly 120, the first counterweight block 122 and the third counterweight block 126 are set to be crescent-shaped. The crescent-shaped counterweight block adopts a streamlined design to reduce wind resistance. At the same time, the second counterweight block 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 bottom of the motor 200 and promote good circulation of the oil.

[0057] Moreover, under the premise of 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, noise and vibration are reduced, and at the same time, the need to introduce new rivets and other materials due to height changes is avoided, thereby reducing production costs and the complexity of material management. The counterweight design of the compressor 300 with improved oil circuit of the present application effectively solves the problems of oil backlog, poor oil circulation, noise and vibration in the prior art by splitting the balance component 120, and improves the flexibility and cost-effectiveness of the design. In addition, the material of the balance component 120 can be specifically a fixed material, including metal, ceramic, and metal mixture, which are not listed here.

[0058] In some embodiments, optionally, Figure 2 , Figure 3 and Figure 4 As shown, a section is taken along the radial direction of the rotor 110 . In the radial 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 1 mm ≤ L1 ≤ 3 mm, and 1 mm ≤ L2 ≤ 3 mm.

[0059] Specifically, Figure 2 , Figure 3 and Figure 4 As shown, a section is taken along the radial direction of the rotor 110. In the radial 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. In order to ensure that the lubricating oil can smoothly pass through the first oil return channel 130 and the second oil return channel 140, and to avoid the first oil return channel 130 and the second oil return channel 140 being too wide, which would cause the structural strength of the balancing assembly 120 to decrease, a reasonable width range is set. Specifically, L1 and L2 are set to meet the following conditions: 1mm≤L1≤3mm, 1mm≤L2≤3mm. Such a width design not only ensures sufficient oil conduction capacity, but also ensures the overall structural strength of the balancing assembly 120, so that the rotor assembly 100 can maintain stability and reliability when rotating at high speed.

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

[0061] In addition, the width design of the first oil return channel 130 and the second oil return channel 140 can also be coordinated with other technical features, such as adjusting the material, shape and density of the counterweight block, so as to further optimize the performance of the rotor assembly 100. For example, by selecting a suitable material to reduce the wind resistance and weight of the counterweight block, or by adjusting the shape of the counterweight block 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, Figure 3 and Figure 4 As shown, the size of the second balance weight 124 is adjustable, so as to change the minimum width L1 of the first oil return passage 130 and the minimum width L2 of the second oil return passage 140 by adjusting the size of the second balance weight 124 .

[0063] Specifically, Figure 3 and Figure 4 As shown, the size of the second counterweight 124 can be adjusted, that is, the size of the second counterweight 124 can be changed. 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 can be changed. Furthermore, by changing the width of the first oil return channel 130 and the width of the second oil return channel 140, the flow speed and pressure of the lubricating oil in the two channels can be changed, thereby ensuring that the lubricating oil can smoothly pass 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, thereby improving the operating efficiency and stability of the motor 200.

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

[0065] Specifically, Figure 3 and Figure 4 As shown, 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, the flow velocity and pressure distribution of the lubricating oil in the two channels can be ensured to be more uniform, thereby avoiding the phenomenon of oil deviation or local blockage caused by the difference in channel width. This uniformly distributed lubricating oil can better cool and lubricate the rotor assembly 100, and improve 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 certain areas of the rotor assembly 100, more lubricating oil may be required for cooling and lubrication, and the width of the oil return channel in this area can be appropriately increased. 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 methods such as simulation analysis and experimental verification, the width design of the two channels can be further optimized so that while meeting the performance requirements of the motor 200, a more efficient oil circuit circulation can be achieved. In addition, the width design of the oil return channel can also be combined with other technical features, such as adjusting the shape, number and position of the oil return channel, to further optimize the lubricating oil circuit of the rotor assembly 100. By setting the first oil return channel 130 and the second oil return channel 140 to be the same or different in width, more options are provided for optimizing the lubricating oil circuit of the rotor assembly 100, which helps to achieve a more efficient, stable and reliable operation of the motor 200.

[0068] In some embodiments, optionally, 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 surface of the rotor 110 is guided by the first oil return channel 130 and the second oil return channel 140, and flows back to the interior of the rotor assembly 100 through the oil return hole 114.

[0069] Specifically, Figure 2 As shown, the rotor assembly 100 also includes a rotor core 112, and the rotor core 112 is inserted into the rotor hole 110 inside the rotor 110. By setting the oil return hole 114 on the rotor core 112, the oil return hole 114 can be connected with the first oil return channel 130 and the second oil return channel 140, forming a lubricating oil return loop. When the oil on the end surface of the rotor 110 is gathered, the oil can flow smoothly into the oil return hole 114 on the rotor core 112 through the drainage effect of the first oil return channel 130 and the second oil return channel 140, and then flow back to the inside of the rotor assembly 100, realizing the recycling of the oil.

[0070] Specifically, the oil return hole 114 can be set as a waist-shaped hole, which is set 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 into a cone or trumpet shape to better guide the oil flow and reduce the resistance during the flow process. At the same time, some guide structures, such as guide grooves or guide plates, can be set inside the oil return hole 114 to further improve the flow state of the oil. By setting 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 extend its 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 a more reliable guarantee for the stable operation of the motor 200 .

[0071] In some embodiments, optionally, Figure 2 As shown, there are a plurality of oil return holes 114 , and the plurality of oil return holes 114 are evenly distributed on the rotor core 112 and distributed circumferentially along the end surface of the rotor core 112 .

[0072] Specifically, Figure 2 As shown, the number of the oil return holes 114 is set to be multiple, and the multiple oil return holes 114 are evenly distributed on the rotor core 112 and arranged circumferentially along the end surface of the rotor core 112. This not only improves the return efficiency of the lubricating oil, but also ensures the uniform distribution of the oil on the rotor core 112, avoiding local oil accumulation.

[0073] Specifically, Figure 2 As shown, the number of oil return holes 114 can be 6, and can be set to 8 or 10 according to actual needs, etc., which are not listed here. The provision of multiple oil return holes 114 allows the lubricating oil to flow into the rotor core 112 more quickly through the first oil return channel 130 and the second oil return channel 140. Since the oil return holes 114 are distributed circumferentially along the end surface of the rotor core 112, the oil can more evenly cover the entire end surface of the rotor core 112 during the flow process, thereby improving the cooling and lubrication effects.

[0074] In some embodiments, optionally, Figure 2 and Figure 3As shown, the balancing assembly 120 is provided with positioning holes 128 , which are respectively opened on the first counterweight block 122 , the second counterweight block 124 and the third counterweight block 126 , and are used to fix and position the first counterweight block 122 , the second counterweight block 124 and the third counterweight block 126 .

[0075] Specifically, Figure 2 and Figure 3 As shown, by setting a positioning hole 128 on the balancing assembly 120, the positioning holes 128 are respectively opened on the first counterweight block 122, the second counterweight block 124 and the third counterweight block 126. The main function of the positioning holes 128 is to ensure the accurate positioning and fixation of the first counterweight block 122, the second counterweight block 124 and the third counterweight block 126 in the rotor assembly 100, so as to maintain the dynamic balance of the rotor assembly 100 when rotating at high speed, and reduce the vibration and noise caused by improper installation.

[0076] Specifically, Figure 2 and Figure 3 As shown, the positioning hole 128 can be designed to be cylindrical, conical or other suitable shapes to meet the installation requirements of different counterweights. The diameter of the positioning hole 128 can be set to 5mm or 6mm, and the diameter of the rivet used for fixing is set to 4mm or 5mm. At the same time, the depth of the positioning hole 128 can also be appropriately adjusted according to the thickness and material of the counterweight to ensure that the counterweight can be fully embedded and fit tightly on the rotor assembly 100. By setting the positioning hole 128 on the balancing assembly 120 and setting the position, number and size of the positioning hole 128, the first counterweight 122, the second counterweight 124 and the third counterweight 126 can be accurately positioned and fixed. Improve the dynamic balancing performance of the rotor assembly 100 and ensure the stability and reliability of the motor 200 when running at high speed.

[0077] In some embodiments, optionally, Figure 1 As shown, there are two groups of balancing components 120 , which are respectively disposed at two ends of the rotor 110 , and the installation positions of the two groups of balancing components 120 at the two ends of the rotor 110 are staggered.

[0078] Specifically, Figure 1As shown, the number of balancing assemblies 120 is set to two groups, and the two groups of balancing assemblies 120 are respectively arranged at the two ends of the rotor 110. Moreover, the installation positions of the two groups of balancing assemblies 120 at the two ends of the rotor 110 are not completely corresponding, but are staggered. Such a setting not only further improves the balancing 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 installation positions of the two groups of balancing assemblies 120 at the two ends of the rotor 110 are staggered, it is conducive to the lubricating oil to quickly flow into the rotor core 112 through the first oil return channel 130 and the second oil return channel 140, thereby improving the oil return efficiency of the lubricating oil circuit.

[0079] Specifically, the staggered distribution can be understood as one group of balancing components 120 being arranged on the left end face of the top of the rotor 110, and another group of balancing components 120 being arranged on the right end face of the bottom of the rotor 110. For example, one group of balancing components 120 can be installed on one end face of the rotor 110, and another group of balancing components 120 can be installed on the other end face of the rotor 110, but the installation positions of the two are staggered by a certain angle in the circumferential direction. In this way, when the rotor 110 rotates at a high speed, it is beneficial to improve the balancing performance of the rotor assembly 100 and reduce the vibration and noise of the motor 200 when rotating at a high speed. At the same time, it is beneficial for the lubricating oil to quickly flow into the rotor core 112 through the first oil return channel 130 and the second oil return channel 140, thereby improving the oil return efficiency of the lubricating oil circuit.

[0080] In some embodiments, optionally, Figure 2 As shown, a section is taken along the radial direction of the rotor. In the section along the radial direction of the rotor, the projection of the balancing assembly on the section is located within the projection of the rotor on the section.

[0081] Specifically, Figure 2 As shown, in the radial cross section of the rotor 110, the projection of the balancing assembly 120 on the cross section is arranged to be within the projection of the rotor 110 on the cross section, that is, the outer contour size of the balancing assembly 120 is smaller than the outer diameter of the rotor 110, which can also be understood as the outer diameter of the balancing assembly 120 is smaller than the outer diameter of the rotor 110, so that the outer dimensions of the balancing assembly 120 do not exceed the outer peripheral surface of the rotor 110, so that the overall diameter of the motor 200 is not increased. 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 the second aspect of the present application, Figure 5 As shown, a motor 200 is also proposed, comprising: a rotor assembly 100 as in the above embodiment, and a stator assembly 210, wherein the stator assembly 210 is sleeved on the rotor assembly 100; and a housing 220, wherein the stator assembly 210 and the rotor assembly 100 are disposed in the housing 220.

[0083] The motor 200 provided in the present application includes the rotor assembly 100 of the above embodiment and thus has all the beneficial effects of the rotor assembly 100 , which will not be described in detail herein.

[0084] In addition, if Figure 5 As shown, the motor 200 further includes a stator assembly 210 and a housing 220, wherein the stator assembly 210 is sleeved on the rotor assembly 100, and the stator assembly 210 and the rotor assembly 100 are arranged in the housing 220. The housing 220, as an external protective structure of the motor 200, not only provides necessary mechanical support, but also plays a role in protection and heat dissipation.

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

[0086] The compressor 300 provided in the present application includes the motor 200 of the above embodiment, and thus has all the beneficial effects of the motor 200, which will not be described in detail here. Specifically, the compressor 300 can be specifically configured as a rotary compressor 300.

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

[0088] The refrigeration device 400 provided in the present application includes the compressor 300 of the above embodiment and thus has all the beneficial effects of the compressor 300, which will not be described in detail here.

[0089] In the description of this application, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the terms "upper" and "lower" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. They 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. The terms "connection", "installation", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0090] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 arranged on the end surface of the rotor and is arranged circumferentially along the end surface of the rotor; The balancing assembly comprises a first counterweight block, a second counterweight block and a third counterweight block, wherein 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; Among them, the second counterweight block and the first 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 to drain the oil on the rotor end face.

2. The rotor assembly according to claim 1, characterized in that Taking a radial section of the rotor, in the radial 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 1 mm ≤ L1 ≤ 3 mm, and 1 mm ≤ L2 ≤ 3 mm.

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

4. The rotor assembly according to claim 1, characterized in that: The rotor assembly also includes a rotor core, which is inserted into the rotor. An oil return hole is provided on the rotor core. The oil on the rotor end surface is drained by the first oil return channel and the second oil return channel, and flows back to the interior of the rotor assembly through the oil return hole.

5. The rotor assembly according to claim 4, characterized in that: There are a plurality of oil return holes, and the plurality of oil return holes are evenly distributed on the rotor core and circumferentially distributed along the end surface of the rotor core.

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

7. The rotor assembly according to any one of claims 1 to 6, characterized in that: There are two groups of balancing components, which are respectively arranged at two ends of the rotor, and the installation positions of the two groups of balancing components at the two ends of the rotor are staggered.

8. The rotor assembly according to any one of claims 1 to 6, characterized in that: A section is taken along the radial direction of the rotor. In the section along the radial direction of the rotor, a projection of the balancing assembly on the section is located within a projection of the rotor on the section.

9. A motor, characterized in that: comprising a rotor assembly as claimed in any one of claims 1 to 8, and A stator assembly, wherein the stator assembly is sleeved on the rotor assembly; A housing is provided in which the stator assembly and the rotor assembly are arranged.

10. A compressor, characterized in that: Comprising the motor as claimed in claim 9.

11. A refrigeration device, characterized in that: Comprising the compressor of claim 10.

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