End plate and rotor assembly

Abstract

The utility model discloses an end plate and a rotor assembly, the end plate comprises a body, the body can be arranged on the end face of a rotary body, the body is provided with a first center line, the first center line divides the body into a first part and a second part, the cross section area of the first part is larger than that of the second part, and the cross section area of the second part is larger than that of the first part; and the outer contour of the second part is at least provided with a first arc-shaped part which is sunken inwards. No balance block is arranged on the end plate, balancing is achieved through mass eccentricity of the end plate, dynamic and static balance is met, mixed gas of a refrigerant and oil cannot be disturbed, sedimentation of refrigerating machine oil is facilitated, and therefore noise and the oil spitting amount are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor rotors, in particular to an end plate and a rotor assembly. BACKGROUND

[0002] A motor rotor for a compressor, an end plate is located on the upper and lower end faces of the rotor, used to cooperate with rivets to compress the core, and at the same time limit the position of the magnetic steel group, and a balance block is usually arranged on the end plate, used to maintain the static balance and dynamic balance of the whole rotary part, thereby reducing vibration, however, after the balance block is arranged on the end plate, the protruding balance block will disturb the refrigerant and oil mixed gas when the rotor is running at high speed, resulting in noise deterioration and increased oil discharge. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiments of the present application is to provide an end plate and a rotor assembly, the end plate is not provided with a balance block, and the balance is achieved through the mass eccentricity of the end plate, so that the dynamic and static balance are both satisfied, and the refrigerant and oil mixed gas is not disturbed, which is beneficial to the sedimentation of the refrigeration oil, thereby reducing noise and oil discharge.

[0004] In order to achieve the above purpose, the following technical solutions are adopted in the present application:

[0005] On the one hand, an end plate is provided, comprising: a body capable of being arranged on the end face of a rotary body, the body having a first center line, the first center line dividing the body into a first part and a second part, the cross-sectional area of the first part being greater than that of the second part, and the second part having at least one first arc-shaped portion recessed inward on its outer contour.

[0006] Further, the difference between the maximum value and the minimum value of the distance from the point on the outer contour of the second part to the center axis of the rotary body is t, and the outer diameter of the rotary body is D, wherein t / D≤0.2.

[0007] Further, the outer contour of the second part comprises a plurality of second arc-shaped portions protruding outward and a plurality of first arc-shaped portions, and the first arc-shaped portions and the second arc-shaped portions are sequentially staggered and connected.

[0008] Further, the radius of the first arc-shaped portion is ≥1mm, and the radius of the second arc-shaped portion is ≥5mm.

[0009] Further, the outer contour of the first part is a circular arc, and the position where the second part connects and transitions to the first part is arc-shaped.

[0010] Further, the body further comprises a second center line, the second center line divides the body into a third part and a fourth part which are asymmetric in shape, and the second center line is perpendicular to the first center line.

[0011] Further, the center of gravity of the third portion and the center of gravity of the fourth portion are symmetrical about the second center line, or the difference between the center of gravity of the third portion and the center of gravity of the fourth portion and the second center line is h, wherein h≤0.1mm.

[0012] Further, the body is made of powder metallurgy material, and the thickness of the body is between 2-3.2mm.

[0013] Further, the body is composed of at least one stainless steel sheet, the thickness of the stainless steel sheet is between 0.8-2.4mm, and the thickness of the body is less than or equal to 2.4mm.

[0014] In another aspect, a rotor assembly is also provided, comprising a core, a magnetic steel group, and two end plates as described above, the two end plates are respectively mounted on both ends of the core, and the eccentric directions of the two end plates are opposite, the magnetic steel group is mounted on the core and is clamped between the two end plates.

[0015] Further, at least one of the end plates is provided with a balance block.

[0016] Further, the body and the balance block are an integral piece, or the balance block is riveted on the body.

[0017] The beneficial effects of the present application are: the static balance and dynamic balance of the rotating body are achieved by the mass eccentricity of the end plate itself without the need to add balance blocks to the end plate. The end plate includes a body which can be arranged on the end face of the rotating body and has a first center line which divides the end plate into two parts: a first part and a second part. The cross-sectional area of the first part is larger than that of the second part, which itself produces mass eccentricity, and at least one first arc-shaped portion is provided on the outer contour of the second part, which is recessed inward. This recessed first arc-shaped portion not only intensifies the mass eccentricity of the end plate, but also optimizes the mass distribution through its specific shape and position, so that the end plate can maintain a balanced state when rotating.

[0018] When the rotor is running at high speed, this mass eccentricity design enables the end plate to automatically generate the necessary centripetal force to offset the unbalanced force without adding any external balance blocks, thereby meeting the requirements of static balance and dynamic balance. This design avoids the disturbance of the refrigerant and oil mixed gas caused by the traditional balance blocks, thereby significantly reducing the noise and oil discharge amount. In addition, the mass eccentricity design may also help to improve the distribution and sedimentation of the refrigeration oil inside the rotor, further improving the operating efficiency of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described in detail below according to the drawings and examples.

[0020] Figure 1 Schematic diagram of the end plate according to an embodiment of the application Figure 1 ;

[0021] Figure 2 Schematic diagram of the end plate according to an embodiment of the application Figure 2 ;

[0022] Figure 3 Schematic diagram of the riveting of the end plate according to an embodiment of the application

[0023] Figure 4 Schematic diagram of the rotor assembly according to an embodiment of the application

[0024] Figure 5 Schematic diagram of the cross section of the compressor according to an embodiment of the application

[0025] In the figure: 1, body; 101, first part; 102, second part; 103, third part; 104, fourth part; 105, annular hole; 106, first center line; 107, second center line; 1021, first arc-shaped part; 1022, second arc-shaped part; 110, end plate; 120, iron core; 130, compressor. DETAILED DESCRIPTION

[0026] In order to make the technical problems solved by the application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the application are described in further detail below. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments of the application. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application.

[0027] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0028] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0029] In the prior art of the motor rotor for the compressor, it is a common practice to provide balance blocks on the end plate to maintain the static and dynamic balance of the entire rotating part. However, this practice also has some significant technical problems, as follows:

[0030] First, when the rotor is running at high speed, the protruding balance blocks will disturb the mixed gas of refrigerant and oil. This disturbance not only causes instability of the gas flow, but also generates friction and collision between the gas and the balance blocks, thus generating additional noise. This noise not only affects the normal operation of the compressor, but also may cause disturbance and discomfort to the surrounding environment and operating personnel.

[0031] Second, the setting of the balance blocks may also affect the settling and distribution of the refrigeration oil. During the high-speed rotation of the rotor, due to the disturbance of the balance blocks, the refrigeration oil may not be effectively settled at the bottom of the rotor, but be thrown to the four corners or above the rotor. This not only leads to waste of refrigeration oil, but also may affect the lubrication effect and operating efficiency of the compressor. At the same time, due to the interference of the balance blocks, it may also increase the risk of oil leakage, leading to an increase in oil discharge.

[0032] Third, the setting of balance blocks on the end plate requires additional machining and installation steps, which not only increases the complexity of the structure, but also increases the manufacturing cost. In addition, the installation position and precision of the balance blocks also need to be strictly controlled to ensure that they can effectively achieve the balancing effect. This strict control requirement also increases the difficulty and cost in the manufacturing process.

[0033] In view of the existing technical problems, the present embodiment provides an end plate, as Figures 1-5As shown, the end plate 110 comprises a body 1 designed to be arranged on the end face of the rotating body, the body 1 having a first center line 106 dividing the body 1 into a first part 101 and a second part 102, the first part 101 having a larger cross-sectional area than the second part 102, and the second part 102 having at least one inwardly recessed first arc-shaped portion 1021 on its outer contour.

[0034] Based on the above scheme, the end plate 110 comprises a body 1 designed to be arranged on the end face of the rotating body. In the center position of the end plate 110, there is a first center line 106 that divides the end plate 110 into two asymmetric parts: the first part 101 and the second part 102. This design itself causes mass eccentricity because the cross-sectional area of the first part 101 is larger than that of the second part 102. To further optimize the mass distribution, the second part 102 is designed with at least one inwardly recessed first arc-shaped portion 1021 on its outer contour. This inwardly recessed first arc-shaped portion 1021 not only further aggravates the mass eccentricity of the end plate 110, but also optimizes the mass distribution through its specific shape and position, ensuring the overall balance during rotation of the rotor. Through precise calculation and simulation testing, the position, shape, and number of the first arc-shaped portion 1021 can be determined to ensure that the end plate 110 can generate the necessary centripetal force to offset the unbalanced force during rotation, thereby meeting the requirements of static and dynamic balance. This design avoids the disturbance of the refrigerant and oil mixed gas caused by traditional balance blocks, thereby significantly reducing noise and oil discharge. In addition, since no additional balance blocks need to be installed on the end plate 110, this design also simplifies the structure of the rotor, reduces manufacturing costs and maintenance difficulty. At the same time, due to the reduction of the interference of the balance block, the settlement and distribution of the refrigeration oil are also improved, further improving the operating efficiency and reliability of the compressor 130.

[0035] Further, the difference between the maximum and minimum distance from the center axis of the revolution body to the points on the outer contour of the second portion 102 is t, and the outer diameter of the revolution body is D, where t / D≤0.2. The setting of this ratio t / D is crucial to the performance of the end plate 110. When the value of t / D is smaller, it means that the outer contour of the second portion 102 is closer to a circle, and such a design can better fit the end face of the revolution body, reducing air flow disturbances caused by irregular shapes. In other words, a second portion 102 outer contour that is closer to a circle can more effectively reduce noise and vibration generated by the rotor when rotating at high speed. At the same time, a smaller t / D ratio also means that the end plate 110 has relatively low machining precision requirements during manufacturing, as the shape is more regular and easier to achieve precise machining and assembly, which not only reduces manufacturing costs, but also improves the reliability and durability of the end plate 110.

[0036] However, it should be noted that although the smaller the t / D ratio is the better, a too small ratio may limit the flexibility of the end plate 110 in the mass eccentric design. Therefore, in actual application, a best t / D ratio range needs to be determined by considering factors such as specific rotor size, speed and working environment. In this embodiment, the limit condition of t / D≤0.2 is set to ensure that the end plate 110 can maintain good air flow disturbance performance while also meeting the balance requirements of the rotor.

[0037] Further, the outer contour of the second portion 102 includes a plurality of convex second arc-shaped portions 1022 and a plurality of first arc-shaped portions 1021, and the first arc-shaped portions 1021 and the second arc-shaped portions 1022 are sequentially staggered and connected. This staggered connection design can reduce air flow disturbances as much as possible while ensuring the mass eccentricity of the end plate 110. Because when the air flow passes through this staggered connection outer contour, it will be guided to flow more smoothly, reducing vortex and turbulence caused by shape mutations, thereby reducing noise and vibration. In addition, the plurality of staggered first arc-shaped portions 1021 and second arc-shaped portions 1022 can also effectively save materials. Under the premise of maintaining the same mass eccentric effect, by optimizing the shape and number of arc-shaped portions, we can reduce unnecessary material usage and reduce manufacturing costs. At the same time, this staggered connection design also improves the strength and stiffness of the end plate 110, as the staggered connection of arc-shaped portions can form a structure similar to a reinforcing rib, so that the end plate 110 can better resist deformation and damage when subjected to external forces.

[0038] Specifically, the radius of the first arc-shaped portion 1021 is ≥ 1 mm, and the radius of the second arc-shaped portion 1022 is ≥ 5 mm. For the first arc-shaped portion 1021, setting its radius ≥ 1 mm ensures that the first arc-shaped portion 1021 has sufficient curvature to produce the necessary mass eccentric effect. At the same time, since the first arc-shaped portion 1021 is concave inward, this radius setting also limits the degree of concave, avoiding material waste and increased processing difficulty due to excessive concave. For the second arc-shaped portion 1022, setting its radius ≥ 5 mm is mainly based on the consideration of saving materials and optimizing airflow disturbance. Since the second arc-shaped portion 1022 is convex outward, a larger radius can make the convex portion transition more smoothly to the end face of the revolution body, reducing airflow disturbance caused by shape mutation. At the same time, a larger radius also means that less material can be used to form the second arc-shaped portion 1022 while maintaining the same mass eccentric effect, thereby reducing manufacturing costs.

[0039] In addition, it is also noted that when the radius of the second arc-shaped portion 1022 is larger, its shape is closer to a part of a circle. Such design not only helps to reduce airflow disturbance, but also can improve the stability of the end plate 110 when rotating. Because when the end plate 110 rotates, a more circular outer contour can reduce the centrifugal force caused by irregular shape, thereby reducing vibration and noise.

[0040] It is worth mentioning that the outer contour of the first portion 101 is a circular arc, and the position where the second portion 102 transitions with the first portion 101 is arc-shaped. The outer contour of the first portion 101 is designed as a circular arc shape. This design not only makes the end plate 110 more visually appealing, but more importantly, the circular arc-shaped outer contour can more effectively guide airflow, reducing vortex and turbulence caused by shape mutation, which helps to reduce noise and vibration generated by the rotor when rotating at high speed, improving the operating efficiency and reliability of the compressor 130. At the same time, it is also noted that the position where the first portion 101 transitions with the second portion 102 affects airflow disturbance. In order to avoid airflow disturbance caused by shape mutation, the transition position is designed as an arc shape. This arc-shaped transition not only makes the end plate 110 smoother overall, but also effectively guides airflow to smoothly transition from the first portion 101 to the second portion 102, reducing vortex and turbulence caused by shape mutation.

[0041] In some embodiments, the body 1 further comprises a second center line 107 that divides the body 1 into a third portion 103 and a fourth portion 104 that are asymmetric in shape, and the second center line 107 is perpendicular to the first center line 106. The asymmetric design of the third portion 103 and the fourth portion 104 provides greater flexibility for the end plate 110, allowing for optimization of the performance of the end plate 110 by adjusting the shape, size, and position of the third portion 103 and the fourth portion 104 according to specific rotor dimensions, rotational speeds, and working environments, etc. This flexibility enables the end plate 110 to better adapt to different application scenarios, improving its versatility and practicality. Moreover, the asymmetric design may also bring some unexpected advantages. For example, in certain specific application scenarios, the asymmetric third portion 103 and the fourth portion 104 may produce specific airflow patterns or acoustic effects, further reducing noise or improving the efficiency of the compressor 130.

[0042] It should be noted that the asymmetric third portion 103 and the fourth portion 104 require different amounts of material to achieve the same balance compared to the symmetric structure. Specifically, to achieve 100% static balance and 83.5% dynamic balance, the asymmetric end plate 110 requires a material mass of about 24.64g, while the symmetric end plate 110 requires a material mass of about 26.52g, i.e., the symmetric structure requires an increase of 16% in height and an increase of 8% in material to achieve the same balance.

[0043] Specifically, annular holes 105 are provided on the third portion 103 and the fourth portion 104, which are mainly used to match the structural design of the rotor. In simple terms, similar hole positions are provided on the corresponding structure of the rotor, which may be designed at different positions according to actual needs, thus requiring corresponding annular holes 105 to be provided on the end plate 110 for matching and installation. Therefore, designing the third portion 103 and the fourth portion 104 as asymmetric structures greatly improves the adaptability of assembly.

[0044] Meanwhile, the center of gravity of the third portion 103 and the center of gravity of the fourth portion 104 are substantially symmetrical about the second center line 107. This design is made for multiple considerations. First, by keeping the centers of gravity of the third portion 103 and the fourth portion 104 substantially symmetrical about the second center line 107, it can be ensured that the end plate 110 will not generate excessive centrifugal force when rotating, thereby reducing the vibration and noise caused by centrifugal force, which is crucial for maintaining the stable operation of the compressor 130. Second, the symmetrical design of the centers of gravity also helps to improve the balancing performance of the end plate 110. Because when the centers of gravity of the third portion 103 and the fourth portion 104 are symmetrical about the second center line 107, the moments generated by them will cancel each other out, making the end plate 110 more balanced as a whole, which helps to reduce the vibration and wear caused by imbalance, prolonging the service life of the end plate 110. In addition, the symmetrical design of the centers of gravity also makes it easier to control the end plate 110 during processing and manufacturing. Because the shapes, sizes and positions of the third portion 103 and the fourth portion 104 can be accurately calculated and determined according to the principle of symmetrical centers of gravity, the precision and efficiency of processing are improved.

[0045] As an optional embodiment, the symmetry of the centers of gravity of the third portion 103 and the fourth portion 104 about the second center line 107 is more strictly quantitatively controlled. Specifically, the difference between the center of gravity of the third portion 103 and the center of gravity of the fourth portion 104 from the second center line 107 is set as h, and h≤0.1mm is specified as the maximum allowable deviation value. Within this error range, the third portion 103 and the fourth portion 104 are substantially symmetrical in the center of gravity position. This strict symmetry control is made for multiple considerations. First, as mentioned earlier, keeping the centers of gravity symmetrical helps to reduce the vibration and noise caused by imbalance, improves the operating efficiency and reliability of the compressor 130, and by setting a smaller allowable deviation value h, the stability and balance of the end plate 110 when rotating can be further ensured. Second, strict symmetry control also helps to improve the processing precision and manufacturing quality of the end plate 110. Because the shapes, sizes and positions of the third portion 103 and the fourth portion 104 need to be accurately calculated and determined according to the principle of symmetrical centers of gravity, a smaller allowable deviation value h can make the processing process more precise and controllable, which helps to reduce processing errors and scrap rates, improve production efficiency and economic benefits. Third, by setting a specific allowable deviation value h, it can also provide a specific standard for quality detection and acceptance of the end plate 110. During manufacturing, various measuring tools and methods can be used to detect the center of gravity positions of the third portion 103 and the fourth portion 104 to ensure that they meet the specified symmetry requirements, which helps to ensure that the quality of the end plate 110 meets the design requirements and provides reliable protection for subsequent assembly and operation.

[0046] Optionally, the body 1 is made of a powder metallurgy material, and the thickness of the body 1 is between 2-3.2mm. Powder metallurgy material is a kind of material with excellent physical and mechanical properties, which can be made into various shapes and sizes of parts through powder metallurgy process. In the design of the end plate 110, the use of powder metallurgy material can bring multiple significant advantages. First, powder metallurgy material has high strength and hardness, which can withstand large mechanical stress and wear, thereby improving the durability and reliability of the end plate 110. Second, powder metallurgy material has good processing performance and plasticity, which can be easily made into various complex shapes and sizes of end plate 110, meeting the needs of different application scenarios. Finally, the thickness of the body 1 is set to be between 2-3.2mm because this thickness range can ensure that the end plate 110 has sufficient strength and stiffness to withstand the centrifugal force and vibration generated by the rotor during high-speed rotation. Moreover, the thinner thickness can reduce the weight and volume of the end plate 110, reducing the amount of material used and manufacturing cost, and also improving the heat dissipation performance of the end plate 110, which helps to reduce the heat generated by friction and wear, prolonging the service life of the end plate 110.

[0047] In particular, the thickness of the body 1 is 2mm, which provides the body 1 with sufficient strength and stiffness to withstand various forces and vibrations generated by the rotor during rotation, while ensuring strength, the use of materials is minimized to maximize cost-effectiveness.

[0048] As an optional embodiment, the thickness of the body 1 is specifically 3.2mm, increasing the thickness of the body 1 to 3.2mm can provide higher strength and stiffness. In the high-speed rotation and vibration environment of the compressor, the thicker body 1 can better resist the action of these external forces, ensuring the stable operation of the rotor.

[0049] In particular, in the design of the end plate 110 of the present embodiment, the construction and material of the body 1 are described in more detail. Specifically, the body 1 is composed of at least one stainless steel sheet, the thickness of which is between 0.8-2.4 mm, and the total thickness of the body 1 is less than or equal to 2.4 mm. Stainless steel is a material with excellent corrosion resistance and mechanical properties, which is very suitable for manufacturing end plates 110 that need to withstand high stress and wear. By choosing stainless steel sheets as the main construction material of the body 1, it can be ensured that the end plate 110 has sufficient strength and durability to meet the needs of different application scenarios. As for setting the thickness of the stainless steel sheet between 0.8-2.4 mm, it can ensure that each stainless steel sheet has sufficient strength and stiffness, while also facilitating processing and manufacturing. In addition, by adjusting the number and thickness of the stainless steel sheets, the total thickness of the body 1 can be flexibly controlled to meet different design requirements. At the same time, the total thickness of the body 1 is limited to be less than or equal to 2.4 mm. This thickness limit can ensure that the end plate 110 maintains sufficient strength and stiffness while minimizing weight and volume, which helps to reduce material usage and manufacturing costs, while also making the end plate 110 more lightweight and easy to install.

[0050] In addition, the body 1 structure composed of at least one stainless steel sheet also has good heat dissipation performance. Because there can be gaps or channels between the stainless steel sheets, which are conducive to heat transfer and dissipation, which helps to reduce the heat generated by friction and wear, prolonging the service life of the end plate 110.

[0051] As another alternative embodiment, the body 1 is made of high manganese steel cast material or other materials with higher density and weak magnetic permeability. High manganese steel cast material is a material with excellent wear resistance and impact resistance. In the design of the end plate 110, the use of high manganese steel castings can ensure that the end plate 110 has excellent durability and wear resistance, especially in harsh environments with high stress and wear. Moreover, high manganese steel castings also have good toughness and plasticity, which can adapt to complex working environments and stress conditions. In addition, other materials with higher density and weak magnetic permeability can also be selected to manufacture the body 1 of the end plate 110. These materials usually have excellent physical and mechanical properties, such as high strength, high hardness, and good corrosion resistance. At the same time, due to their weak magnetic permeability, they can reduce electromagnetic interference and eddy current loss, which is of great significance to improve the efficiency and stability of the compressor 130. When selecting these materials, multiple factors need to be considered, including the cost of the material, the processing performance, the manufacturability, and the specific application requirements of the end plate 110. Through reasonable material selection and structural design, the end plate 110 can have sufficient strength and durability while meeting the requirements of the compressor 130 in terms of balance, vibration, and noise.

[0052] It is worth mentioning that, due to the above-mentioned end plate 110 without boss balance block design, when fixing the end plate 110 by rivets, the rivets can be unified, the overall weight is reduced, and the cost is reduced. Moreover, the design without boss does not disturb the airflow, which reduces the interference torque of the rotating body and the gas noise at high speed.

[0053] On the other hand, a rotor assembly is also provided, which includes a core 120, a magnetic steel group, and two end plates 110 as described above, the two end plates 110 are respectively installed at both ends of the core 120, and the eccentric directions of the two end plates 110 are opposite, the magnetic steel group is installed on the core 120 and is clamped between the two end plates 110.

[0054] In the above scheme, the eccentric mass of the upper and lower end plates 110 in the horizontal direction is collinear with the eccentric mass of the core 120 and the magnetic steel group. This means that when the rotor rotates, these eccentric masses will jointly generate a smooth and controllable centrifugal force, which helps to achieve dynamic balance of the rotor. At the same time, since the eccentric directions of the upper and lower end plates 110 are opposite, the mass balance of the rotor assembly is achieved by mass eccentricity after installation, thereby ensuring static balance and dynamic balance, and further improving the stability and reliability of the rotor.

[0055] It is worth noting that although the end plates 110 have eccentric mass in the horizontal direction, their shape and size are not bilateral symmetry, and this asymmetric design fully utilizes the space of the non-hole part of the rotor, and through careful calculation and optimization, the eccentricity and eccentric mass are increased, thereby improving the utilization rate of materials. This means that while maintaining the overall performance and stability of the rotor, the amount of material used is successfully reduced, and the manufacturing cost is reduced.

[0056] Further, at least one of the end plates 110 is provided with a balance block. Specifically, a balance block can be provided on the lower end plate 110 to further balance, and the upper end plate 110 still does not have a balance block. The reason for this design is that the upper of the compressor 130 is closer to the pipeline, and if a balance block is provided on the upper end plate 110, it is easy to disturb the gas, which leads to an increase in oil discharge. The lower part of the compressor 130 is away from the refrigerant pipeline, so that the end plate 110 cannot achieve effective balance, or a larger eccentric mass is required to balance. In the case of balancing, the balance block can be selected to ensure static and dynamic balance, which is more advantageous in cost.

[0057] Optionally, the body 1 and the counterweight are integrated. The integrated design can directly form the counterweight while manufacturing the end plate 110, thereby reducing additional manufacturing and assembly steps, and the integrated design can also optimize the use of materials. Through accurate calculation and analysis, the shape and size required by the counterweight can be determined and integrated with the body 1 of the end plate 110, thereby making full use of materials and reducing waste, which helps to reduce manufacturing costs and improve material utilization.

[0058] In some embodiments, the body 1 and the counterweight are independent, and then the counterweight is riveted to the body 1. Designing the body 1 and the counterweight as independent components provides greater flexibility, which means that different materials, shapes and sizes of counterweights can be selected according to actual needs to meet different balancing requirements. At the same time, independent components also facilitate maintenance and replacement. If the counterweight is damaged or fails, it can be replaced individually without replacing the entire end plate 110. Through riveting, the firm connection between the counterweight and the body 1 can be ensured, which can remain stable even in the case of high-speed rotation and vibration. In addition, riveting can also provide additional strength and support, which helps to enhance the overall rigidity and stability of the end plate 110. The riveting process requires precise control to ensure the correct position and angle between the counterweight and the body 1, and any slight deviation can cause a decrease in balancing performance or an increase in vibration. Therefore, strict quality control measures need to be taken during manufacturing and assembly to ensure product quality and consistency.

[0059] It should be noted that the above-mentioned end plate 110 can be applied to rotating bodies that need to be balanced, including but not limited to rotors, and can also be inertia energy storage flywheels, drive motors, etc.

[0060] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", and the like orientation or position relationship are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0061] In the description of the present specification, the description referring to the terms "an embodiment", "an example" and the like 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 the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0062] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0063] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations here, those skilled in the art can think of other specific embodiments of the present application without creative labor, and these ways will fall within the scope of protection of the present application.

Claims

1. An end plate (110) characterized in that, The body (1) can be arranged on the end face of a rotary body, the body (1) has a first center line (106) which divides the body (1) into a first part (101) and a second part (102), the cross-sectional area of the first part (101) is larger than that of the second part (102), and the outer contour of the second part (102) has at least one inwardly recessed first arc-shaped portion (1021). The difference between the maximum and minimum distances of the points on the outer contour of the second part (102) to the center axis of the rotary body is t, and the outer diameter of the rotary body is D, wherein t / D≤0.

2.

2. The end plate (110) according to claim 1, characterized in that The outer contour of the second part (102) includes a plurality of outwardly convex second arc-shaped portions (1022) and a plurality of first arc-shaped portions (1021), and the first arc-shaped portions (1021) and the second arc-shaped portions (1022) are alternately connected in sequence.

3. The end plate (110) according to claim 1, characterized in that The radius of the first arc-shaped portion (1021) is ≥1mm, and the radius of the second arc-shaped portion (1022) is ≥5mm.

4. The end plate (110) according to claim 3, characterized in that The outer contour of the first part (101) is a circular arc, and the position where the second part (102) connects and transitions to the first part (101) is arc-shaped.

5. The end plate (110) according to any one of claims 1-4, characterized in that The body (1) further includes a second center line (107) which divides the body (1) into a third part (103) and a fourth part (104) which are asymmetric in shape, and the second center line (107) is perpendicular to the first center line (106).

6. The end plate (110) according to any one of claims 1-4, characterized in that The centers of gravity of the third part (103) and the fourth part (104) are symmetric about the second center line (107), or the difference between the centers of gravity of the third part (103) and the fourth part (104) and the second center line (107) is h, wherein h≤0.1mm.

7. The end plate (110) according to claim 6, characterized in that The body (1) is made of powder metallurgy material, and the thickness of the body (1) is between 2-3.2mm.

8. The end plate (110) according to any one of claims 1-4, characterized in that The body (1) is composed of at least one stainless steel sheet, the thickness of the stainless steel sheet is between 0.8-2.4mm, and the thickness of the body (1) is less than or equal to 2.4mm.

9. The end plate (110) according to any one of claims 1-4, characterized in that The core (120), a magnetic steel group, and two end plates (110) according to any one of claims 1-9 are included, the two end plates (110) are respectively arranged on the two ends of the core (120), and the eccentric directions of the two end plates (110) are opposite, the magnetic steel group is arranged on the core (120) and is clamped between the two end plates (110).

10. A rotor assembly characterized by, At least one of the end plates (110) is provided with a balance block.

11. The rotor assembly of claim 10, wherein The body (1) and the balance block are an integral part, or the balance block is riveted on the body (1).

12. The rotor assembly of claim 11, wherein, ​

Images