Rotor processing method based on double guarantee of dynamic balance and magnetizing performance
Through the method of phased winding of carbon fiber layer and dynamic balance calibration, the problem of dynamic balance and magnetic charging performance in traditional rotor processing is solved, and the high-precision dynamic balance and efficient magnetic charging of the rotor are achieved, which improves the performance of high-speed permanent magnet motors.
Patent Information
- Application Number
- CN202510836489.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-21
- Publication Date
- 2025-08-29
AI Technical Summary
Traditional rotor processing methods are difficult to meet the requirements of dynamic balance accuracy and magnetic charging performance at the same time. Especially in high-speed permanent magnet motors, it is difficult to take into account the thickness of the carbon fiber layer and the magnetic charging strength of the magnetic steel, resulting in the magnetic steel falling off or the magnetic unsaturation area being too large, affecting the motor performance.
The method of winding the carbon fiber layer in stages is adopted, first forming the first carbon fiber layer to fix the magnetic steel, then forming the second carbon fiber layer to improve the strength, and dynamic balance calibration is performed separately before and after assembly, and the threaded hole or rivet hole is adjusted in combination with the dynamic balance testing device for accurate calibration.
It improves the dynamic balance accuracy and magnetic charging performance of the rotor, reduces the vibration amplitude during the rotor operation, and enhances the effective utilization rate of magnets and the strength requirements of the rotor at high speeds.
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Figure CN120566831A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of rotor processing, and in particular to a rotor processing method based on dual guarantees of dynamic balancing and magnetizing performance. Background Art
[0002] Amidst the rapid growth of China's industrialization and electrification, permanent magnet synchronous motors (PMSMs) are gaining increasing importance in the industrial and automotive sectors due to their simple structure, high efficiency, and high power density. As end-users' demands for equipment performance continue to rise, demand for high-speed PMSMs continues to grow. However, at high speeds, the centrifugal force exerted by the rotor magnets on the silicon steel sheets increases exponentially, making it difficult for traditional silicon steel sheets to meet the required strength. Carbon fiber, with its high yield strength, is an ideal material for securing the magnets, particularly for surface-mount rotor structures.
[0003] In order to simplify the process, unmagnetized magnets are often used for magnetization in the rotor state, but the thickness selection of the carbon fiber layer becomes a key problem: insufficient thickness can easily cause the magnets to fall off during transportation and magnetization; excessive thickness significantly increases the magnetic field strength required for magnetization, making it difficult to achieve the designed magnetization state of the magnets, affecting the motor performance. At the same time, as the operating speeds of industrial equipment such as high-speed motors continue to rise, the requirements for rotor dynamic balancing accuracy are becoming increasingly stringent. Currently, the conventional method is to adjust the rotor's imbalance by adding or adjusting counterweights at the pressure plates at both ends of the rotor, bringing the rotor's center of gravity as close as possible to the rotor's axis of rotation. This method has significant limitations. It only focuses on adjusting the balance of the rotor as a whole, and the counterweights at both ends mask any local imbalances in the rotor. This can still potentially affect the performance of precision equipment with extremely high accuracy requirements.
[0004] Therefore, how to solve the above-mentioned deficiencies in the prior art has become the subject to be studied and solved by the present invention. Summary of the Invention
[0005] The purpose of the present invention is to provide a rotor processing method based on the dual guarantee of dynamic balance and magnetizing performance.
[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A rotor processing method based on dual guarantees of dynamic balancing and magnetizing performance is provided for a rotor structure, wherein the rotor structure includes a rotating shaft, a first pressure plate, a plurality of core groups, and a second pressure plate, wherein the core group includes a rotor core and magnetic steel; Rotor processing methods include: Performing dynamic balancing calibration on the rotating shaft, and adjusting and calibrating according to the unbalanced mass and position of the rotating shaft; Performing dynamic balancing calibration on the first pressing plate, and then assembling the first pressing plate with the rotating shaft after dynamic balancing calibration; Performing dynamic balancing calibration on each core group, adjusting and calibrating the core groups according to their unbalanced mass and position, and then assembling each core group with the rotating shaft after dynamic balancing calibration; Performing dynamic balancing calibration on the second pressing plate, and then assembling the second pressing plate with the rotating shaft after dynamic balancing calibration; Performing a first stage winding operation using carbon fiber to form a first carbon fiber layer on the outside of each core group; When the thickness of the first carbon fiber layer reaches a first predetermined thickness, the winding operation is terminated, and then each of the core groups is magnetized, and the first predetermined thickness is adjusted by summarizing the magnetization performance test results of each of the core groups; After magnetization, a second stage of winding is performed using carbon fibers to form a second carbon fiber layer outside the first carbon fiber layer; When the thickness of the second carbon fiber layer reaches the second predetermined thickness, the winding operation is ended, and then the rotor structure as a whole is dynamically balanced to ensure that the balance quality of the rotor structure as a whole at different positions in the axial direction remains consistent.
[0007] The order of the above steps is not specifically limited here and can be adjusted according to actual needs.
[0008] The assembly of the rotor core and the magnetic steel is already known and will not be described in detail here. When the core assembly is magnetized, the magnetic steel is actually magnetized.
[0009] The dynamic balancing calibration process consists of two steps: unbalance measurement and calibration execution. This application adopts existing methods for implementation, but with some modifications to the implementation details. Unbalance measurement can be achieved using existing devices such as dynamic balancing machines, which is well known to those skilled in the art and will not be described in detail here.
[0010] On the one hand, the present application performs dynamic balancing calibration on each component structure such as the internal rotating shaft before assembling the rotor (structure) to reduce the initial imbalance of the rotor. At the same time, the rotor is dynamically balanced and calibrated as a whole after assembly to reduce the residual imbalance of the rotor, so that the dynamic balancing accuracy of the rotor meets the design requirements and the unbalanced mass distribution at each axial position of the rotor is effectively suppressed, thereby effectively reducing the vibration amplitude of the rotor during operation.
[0011] On the other hand, the winding operation is divided into two stages. The first stage forms the first carbon fiber layer, which can not only fix the magnetic steel, but also solve the problem of the large magnetic unsaturated area between the N pole and the S pole caused by the excessive thickness of the carbon fiber winding in the surface-mounted rotor, thereby improving the effective utilization rate of the magnetic steel; the second stage forms the second carbon fiber layer. The second carbon fiber layer and the first carbon fiber layer form a thicker combined carbon fiber layer to meet the strength requirements of the rotor at high speed.
[0012] The magnetization method is conventional, specifically, using the principle of electromagnetic induction to generate a strong magnetic field using magnetization equipment to magnetize the core material. This is well known to those skilled in the art and will not be described in detail here.
[0013] Regarding magnetization, additional explanation is provided here to help understand: when the rotor runs at high speed, there is a certain thickness requirement for the carbon fiber layer to avoid the magnets falling off during transportation and magnetization. However, an overly thick carbon fiber layer will cause the rotor to require a very high magnetic field strength during the magnetization process to ensure that the magnetization state of the magnets meets the design requirements. The stronger the magnetic field strength required by traditional magnetization equipment, the larger the end size of the magnetization coil, which will lead to a larger magnetic unsaturated area between the north and south poles of the rotor, reducing the effective utilization rate of the magnets, resulting in a large deviation between the design plan and the actual plan, and failing to meet the design requirements.
[0014] After magnetization, the magnetization performance of the core group is tested, and the first predetermined thickness is adjusted according to the test results. It is supplemented as follows: the first predetermined thickness will affect the magnetization performance of the core group. The first predetermined thickness is initially set. The magnetization performance test results of each core group can be summarized and the first predetermined thickness can be adjusted to ensure the magnetization performance of subsequent core groups.
[0015] According to a further technical solution, the steps of assembling the rotor structure in the rotor processing method include: Step 1: Assemble the first pressing plate and the rotating shaft; Step 2: Assemble each of the core groups with the rotating shaft; Step 3: Assemble the second pressing plate and the rotating shaft; Step 4: Use carbon fiber to perform winding operation.
[0016] In the rotor structure, each core group forms a surface-mounted core group structure. Along the axial direction of the rotor structure, the first pressing plate and the second pressing plate are respectively fixed to the two ends of the surface-mounted core group structure.
[0017] When the first pressing plate is assembled with the rotating shaft, the first pressing plate can be positioned by the shaft shoulder portion on the rotating shaft.
[0018] The first pressing plate is assembled before the surface-mounted core group structure and the rotating shaft, so as to facilitate positioning of the surface-mounted core group structure and the carbon fiber layer.
[0019] The second pressing plate is bonded and fixed to the surface-mounted core assembly structure before the carbon fiber structure, so as to facilitate positioning of the carbon fiber layer.
[0020] The first and second pressing plates limit the length of the combined carbon fiber layer and also facilitate determining the thickness of the carbon fiber layer, allowing for timely termination of the winding operation. The carbon fiber layer comprises a first carbon fiber layer and a second carbon fiber layer. Taking the first pressing plate as an example, the first predetermined thickness is determined when the outer surface of the first carbon fiber layer is flush with position A, and the second predetermined thickness is determined when the outer surface of the second carbon fiber layer is flush with position B.
[0021] According to a further technical solution, a plurality of first threaded holes are formed at both axial ends of the rotating shaft and are evenly distributed around the axis of the rotating shaft; The step of performing dynamic balancing calibration on the rotating shaft comprises: Performing a dynamic balance test on the rotating shaft using a dynamic balance test device; At least one first screw is threadedly assembled with part of the first threaded holes according to the dynamic balancing test result.
[0022] The dynamic balancing test device is similar to the dynamic balancing machine described above. Dynamic balancing testing refers to the aforementioned imbalance measurement. Dynamic balancing test results may include imbalance magnitude, phase, and axial position distribution. During calibration, the first screw may be removed as needed.
[0023] The first threaded holes are evenly distributed around the circumference. On the one hand, this can reduce the difficulty of opening the first threaded holes and adapt to the situation of batch processing of the rotating shafts. On the other hand, the rotating shafts can be flexibly calibrated for dynamic balance according to the dynamic balance test results, thereby improving the dynamic balance calibration effect and further ensuring the dynamic balance level of the rotor (meets expectations).
[0024] Based on the dynamic balancing test results, at least one first screw is threadedly assembled into some of the first threaded holes to ensure that the dynamic imbalance of the shaft at the target speed meets the design requirements. This threaded assembly method provides a stable connection, preventing the dynamic balancing calibration of the shaft from being affected by loosening of the first screw, and further ensuring the dynamic balance level of the rotor. The threaded assembly method is also convenient, simple to operate, and low-cost. It does not require de-weighting as required by traditional de-weighting dynamic balancing methods, which can prevent contamination of the site and equipment by metal shavings from de-weighting.
[0025] In some embodiments, the cross-section of the rotating shaft has an inner ring and an outer ring, with the first threaded hole closer to the outer ring. In this case, the counterweight radius is larger, the required counterweight mass is reduced, and this facilitates dynamic balancing calibration. The following description of the second threaded hole, third threaded hole, and rivet hole refers to this paragraph.
[0026] In a further technical solution, the first pressing plate is provided with a plurality of second threaded holes evenly distributed around the axis of the first pressing plate, and the second pressing plate is provided with a plurality of third threaded holes evenly distributed around the axis of the second pressing plate; The step of performing dynamic balance calibration on the first pressure plate includes: Performing a dynamic balance test on the first pressing plate using a dynamic balance test device; threadingly assembling at least one second screw with part of the second threaded holes according to the dynamic balancing test result; The step of performing dynamic balance calibration on the second pressure plate includes: Performing a dynamic balance test on the second pressing plate using a dynamic balance test device; At least one third screw is threadedly assembled with part of the third threaded holes according to the dynamic balancing test result.
[0027] The purpose of this part is the same as that of the above embodiment, so detailed description is not repeated here. This part also uses thread assembly to realize counterweight and thus realize dynamic balance calibration, further ensuring the dynamic balance level of the rotor.
[0028] According to a further technical solution, each of the core groups is provided with a plurality of rivet holes uniformly distributed around the axis of the core group; The step of performing dynamic balance calibration on the core group includes: Performing a dynamic balance test on the core assembly using a dynamic balance test device; At least one rivet is fixedly assembled with part of the rivet holes according to the dynamic balance test result.
[0029] The overall design intention of this part is the same as that of the above embodiment, but there are certain differences: As mentioned above, along the axial direction of the rotor structure, the first pressure plate and the second pressure plate are respectively fixed to the two ends of the surface-mounted core group structure. Therefore, this embodiment uses rivet holes instead of threaded holes, which reduces the processing difficulty of the surface-mounted core group structure and thus reduces the processing cost, and also avoids the counterweight structure (rivet) from being easily loosened.
[0030] In some embodiments, the rivet holes are replaced with pin holes, and the rivets are replaced with pins.
[0031] According to a further technical solution, each of the core groups is subjected to dynamic balancing calibration in sequence; After any core group completes dynamic balancing, it is immediately assembled with the shaft. This arrangement conserves dynamic balancing equipment while accelerating assembly, striking a balance between structural cost savings and ensuring rotor processing progress. The term "immediately" is not a time limit; it emphasizes that the core group that has completed dynamic balancing does not need to wait for the remaining core groups.
[0032] According to a further technical solution, the second carbon fiber layer, the first pressing plate and the second pressing plate have the same or similar outer diameters.
[0033] For example, if the second carbon fiber layer and the first pressure plate have the same outer diameter, this not only improves the utilization of the rotor's radial space, but also offers other benefits. For example, the outer surface of the second carbon fiber layer forms a continuous support surface with the outer surface of the first pressure plate, avoiding stress concentration caused by dimensional differences. The outer diameters of the second carbon fiber layer and the first pressure plate can be close, for example, with a millimeter-level deviation, with no specific limitation on the range of proximity.
[0034] The terms “include”, “including”, “have”, etc. used in this document are open-ended terms, meaning including but not limited to.
[0035] Unless otherwise noted, the terms used herein generally have their ordinary meanings in the art, in the context of this application, and in the specific context. Certain terms used to describe this application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of this application.
[0036] The working principle and advantages of the present invention are as follows: On the one hand, the present application performs dynamic balancing calibration on each component structure such as the internal rotating shaft before assembling the rotor to reduce the initial imbalance of the rotor. At the same time, the rotor is dynamically balanced and calibrated as a whole after assembly to reduce the residual imbalance of the rotor, so that the dynamic balancing accuracy of the rotor meets the design requirements and the unbalanced mass distribution at each axial position of the rotor is effectively suppressed, thereby effectively reducing the vibration amplitude of the rotor during operation.
[0037] On the other hand, the winding operation is divided into two stages. The first stage forms the first carbon fiber layer, which can not only fix the magnetic steel, but also solve the problem of the large magnetic unsaturated area between the N pole and the S pole caused by the excessive thickness of the carbon fiber winding in the surface-mounted rotor, thereby improving the effective utilization rate of the magnetic steel; the second stage forms the second carbon fiber layer. The second carbon fiber layer and the first carbon fiber layer form a thicker combined carbon fiber layer to meet the strength requirements of the rotor at high speed.
[0038] After magnetization, the magnetization performance of the core groups is tested, the magnetization performance test results of each core group are summarized, and then the first predetermined thickness is adjusted to ensure the magnetization performance of subsequent core groups. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] Figure 1 Schematic diagram of the assembly state of the rotating shaft and the first pressing plate according to an embodiment of the present invention; Figure 2 for Figure 1 Structural diagram from another perspective; Figure 3 This is a schematic structural diagram of the first pressing plate and the second pressing plate according to an embodiment of the present invention; Figure 4 for Figure 3Section view along section line AA; Figure 5 Schematic diagram of the assembly state of the rotating shaft and the first pressing plate according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the assembly state of the rotating shaft, the first pressing plate and each core group according to an embodiment of the present invention; Figure 7 Schematic diagram of the assembly state of the rotating shaft, the first pressing plate, each core group and the second pressing plate according to an embodiment of the present invention; Figure 8 for Figure 7 Structural diagram from another perspective; Figure 9 This is a schematic diagram of the rotor structure after the first stage of winding operation is completed according to an embodiment of the present invention; Figure 10 for Figure 9 Structural diagram from another perspective; Figure 11 This is a schematic diagram of the rotor structure after the second stage winding operation is completed according to an embodiment of the present invention; Figure 12 for Figure 11 Structural diagram from another perspective; Figure 13 It is a schematic diagram of the magnetization state of the iron core group in the prior art; Figure 14 Schematic diagram of the magnetization state of the core group in an embodiment of the present invention; Figure 15 This is a flow chart of rotor processing in a specific implementation manner of an embodiment of the present invention.
[0040] In the above figures: 1, rotating shaft; 11, first threaded hole; 2, first pressure plate; 21, second threaded hole; 3, core assembly; 4, second pressure plate; 41, third threaded hole; 5, first carbon fiber layer; 6, second carbon fiber layer. DETAILED DESCRIPTION
[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments: Embodiment: The present invention will be clearly illustrated below with drawings and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.
[0042] The terms used herein are for describing specific embodiments only and are not intended to be limiting of the present invention. Singular forms such as "a," "the," "this," "this," and "the" as used herein also include plural forms.
[0043] See also Figures 1-15, based on the rotor processing method with dual guarantees of dynamic balance and magnetization performance, for the rotor structure, the rotor structure includes a rotating shaft 1, a first pressure plate 2, multiple core groups 3, and a second pressure plate 4, and the core group 3 includes a rotor core and magnetic steel; Rotor processing methods include: Performing dynamic balancing calibration on the rotating shaft 1, and adjusting and calibrating according to the unbalanced mass and position of the rotating shaft 1; Performing dynamic balancing calibration on the first pressing plate 2, and then assembling the first pressing plate 2 with the rotating shaft 1 after dynamic balancing calibration; Performing dynamic balancing calibration on each of the core groups 3, adjusting and calibrating the core groups 3 according to their unbalanced mass and position, and then assembling each of the core groups 3 with the rotating shaft 1 after dynamic balancing calibration; Performing dynamic balancing calibration on the second pressing plate 4, and then assembling the second pressing plate 4 with the rotating shaft 1 after dynamic balancing calibration; A first stage of winding operation is performed using carbon fiber to form a first carbon fiber layer 5 on the outer side of each of the core groups 3; When the thickness of the first carbon fiber layer 5 reaches a first predetermined thickness, the winding operation is terminated, and then each of the core groups 3 is magnetized, and the first predetermined thickness is adjusted by summarizing the magnetization performance test results of each of the core groups 3; After magnetization, a second stage of winding is performed using carbon fibers to form a second carbon fiber layer 6 outside the first carbon fiber layer 5. When the thickness of the second carbon fiber layer 6 reaches the second predetermined thickness, the winding operation is terminated, and then the entire rotor structure is dynamically balanced to ensure that the balance quality of the entire rotor structure at different axial positions remains consistent.
[0044] The order of the above steps is not specifically limited here and can be adjusted according to actual needs.
[0045] The assembly of the rotor core and the magnetic steel is conventional and will not be described in detail here. When the core group 3 is magnetized, it is actually the magnetic steel that is magnetized.
[0046] The dynamic balancing calibration process consists of two steps: unbalance measurement and calibration execution. This application adopts existing methods for implementation, but with some modifications to the implementation details. Unbalance measurement can be achieved using existing devices such as dynamic balancing machines, which is well known to those skilled in the art and will not be described in detail here.
[0047] On the one hand, the present application performs dynamic balancing calibration on each component structure such as the internal rotating shaft 1 before assembling the rotor (structure) to reduce the initial imbalance of the rotor. At the same time, the rotor is dynamically balanced and calibrated as a whole after assembly to reduce the residual imbalance of the rotor, so that the dynamic balancing accuracy of the rotor meets the design requirements and the unbalanced mass distribution at each axial position of the rotor is effectively suppressed, thereby effectively reducing the vibration amplitude of the rotor during operation.
[0048] On the other hand, the winding operation is divided into two stages. The first stage forms the first carbon fiber layer 5, which can not only fix the magnetic steel, but also solve the problem of a large magnetic unsaturated area between the N pole and the S pole caused by excessively thick carbon fiber winding in the surface-mounted rotor, thereby improving the effective utilization rate of the magnetic steel; the second stage forms the second carbon fiber layer 6. The second carbon fiber layer 6 and the first carbon fiber layer 5 form a thicker combined carbon fiber layer to meet the strength requirements of the rotor at high speed.
[0049] The magnetization method is conventional, specifically, using the principle of electromagnetic induction to generate a strong magnetic field using magnetization equipment to magnetize the core material. This is well known to those skilled in the art and will not be described in detail here.
[0050] Regarding magnetization, additional explanation is provided here to help understand: when the rotor runs at high speed, there is a certain thickness requirement for the carbon fiber layer to avoid the magnets falling off during transportation and magnetization. However, an overly thick carbon fiber layer will cause the rotor to require a very high magnetic field strength during the magnetization process to ensure that the magnetization state of the magnets meets the design requirements. The stronger the magnetic field strength required by traditional magnetization equipment, the larger the end size of the magnetization coil, which will lead to a larger magnetic unsaturated area between the north and south poles of the rotor, reducing the effective utilization rate of the magnets, resulting in a large deviation between the design plan and the actual plan, and failing to meet the design requirements.
[0051] After magnetization, the magnetization performance of the core group 3 is tested, and the first predetermined thickness is adjusted based on the test results. It is supplemented as follows: the first predetermined thickness will affect the magnetization performance of the core group 3. The first predetermined thickness is initially set. The magnetization performance test results of each core group 3 can be summarized and then the first predetermined thickness can be adjusted to ensure the magnetization performance of subsequent core groups 3.
[0052] See also Figure 5-Figure 12 In this embodiment, the steps of assembling the rotor structure in the rotor processing method include: Step 1: Assemble the first pressing plate 2 and the rotating shaft 1; Step 2: Assemble the core groups 3 with the rotating shaft 1; Step 3: Assemble the second pressing plate 4 and the rotating shaft 1; Step 4: Use carbon fiber to perform winding operation.
[0053] In the rotor structure, each core group 3 forms a surface-mounted core group 3 structure. Along the axial direction of the rotor structure, the first pressure plate 2 and the second pressure plate 4 are respectively fixed to the two ends of the surface-mounted core group 3 structure.
[0054] When the first pressing plate 2 is assembled with the rotating shaft 1 , the first pressing plate 2 can be positioned by the shaft shoulder portion on the rotating shaft 1 .
[0055] The first pressing plate 2 is assembled before the surface-mounted core group 3 structure and the rotating shaft 1, so as to facilitate positioning of the surface-mounted core group 3 structure and the carbon fiber layer.
[0056] The second pressing plate 4 is bonded and fixed to the surface-mounted core assembly 3 structure before the carbon fiber structure, so as to facilitate positioning of the carbon fiber layer.
[0057] The first pressing plate 2 and the second pressing plate 4 limit the length of the combined carbon fiber layer, and are also helpful in assisting in determining the thickness of the carbon fiber layer and completing the winding operation in time. The carbon fiber layer includes a first carbon fiber layer 5 and a second carbon fiber layer 6. Taking the first pressing plate 2 as an example, see Figure 4 When the outer surface of the first carbon fiber layer 5 is flush with position A, it is judged that it has reached the first predetermined thickness. When the outer surface of the second carbon fiber layer 6 is flush with position B, it is judged that it has reached the second predetermined thickness.
[0058] See also Figure 1-Figure 2 In this embodiment, a plurality of first threaded holes 11 are formed at both axial ends of the rotating shaft 1 and are evenly distributed around the axis of the rotating shaft 1; The step of performing dynamic balance calibration on the rotating shaft 1 includes: Performing a dynamic balance test on the rotating shaft 1 using a dynamic balance test device (not shown in the figure); At least one first screw (not shown in the figure) is threadedly assembled with part of the first threaded holes 11 according to the dynamic balancing test result.
[0059] The dynamic balancing test device is similar to the dynamic balancing machine described above. Dynamic balancing testing refers to the aforementioned imbalance measurement. Dynamic balancing test results may include imbalance magnitude, phase, and axial position distribution. During calibration, the first screw may be removed as needed.
[0060] The first threaded holes 11 are evenly distributed around the circumference. On the one hand, this can reduce the difficulty of opening the first threaded holes 11 and adapt to the situation of batch processing of the rotating shaft 1. On the other hand, the rotating shaft 1 can be flexibly calibrated for dynamic balance according to the dynamic balance test results, thereby improving the dynamic balance calibration effect and further ensuring the dynamic balance level of the rotor (meets expectations).
[0061] Based on the dynamic balancing test results, at least one first screw is threadedly assembled into a portion of the first threaded holes 11 to ensure that the dynamic imbalance of the rotating shaft 1 at the target speed meets the design requirements. This threaded assembly method provides a stable connection, preventing the dynamic balancing calibration of the rotating shaft 1 from being affected by loosening of the first screw, and further ensuring the dynamic balance level of the rotor. The threaded assembly method is also convenient, simple to operate, and low-cost. It does not require de-weighting as required by traditional de-weighting dynamic balancing methods, which prevents contamination of the site and equipment by metal shavings from the de-weighting.
[0062] In some embodiments, the cross-section of the rotating shaft 1 has an inner ring and an outer ring, with the first threaded hole 11 closer to the outer ring. In this case, the counterweight radius is larger, and the required counterweight mass is reduced, which facilitates dynamic balancing calibration. The following description of the second threaded hole 21, the third threaded hole 41, and the rivet hole refers to this paragraph.
[0063] See also Figure 3 In this embodiment, the first pressing plate 2 is provided with a plurality of second threaded holes 21 evenly distributed around the axis of the first pressing plate 2, and the second pressing plate 4 is provided with a plurality of third threaded holes 41 evenly distributed around the axis of the second pressing plate 4; The step of performing dynamic balance calibration on the first pressure plate 2 includes: Performing a dynamic balance test on the first pressing plate 2 using a dynamic balance test device; According to the dynamic balancing test result, at least one second screw (not shown) is threadedly assembled with part of the second threaded holes 21; The step of performing dynamic balance calibration on the second pressure plate 4 includes: Performing a dynamic balance test on the second pressing plate 4 using a dynamic balance test device; At least one third screw (not shown in the figure) is threadedly assembled with part of the third threaded hole 41 according to the dynamic balance test result.
[0064] The purpose of this part is the same as that of the above embodiment, so detailed description is not repeated here. This part also uses thread assembly to realize counterweight and thus realize dynamic balance calibration, further ensuring the dynamic balance level of the rotor.
[0065] In this embodiment, each of the core groups 3 is provided with a plurality of rivet holes (not shown in the figure) uniformly distributed around the axis of the core group 3. The step of performing dynamic balance calibration on the core group 3 includes: Performing a dynamic balance test on the core group 3 using a dynamic balance test device; At least one rivet (not shown in the figure) is fixedly assembled with some of the rivet holes according to the dynamic balance test result.
[0066] The overall design intention of this part is the same as that of the above embodiment, but there are certain differences: As mentioned above, along the axial direction of the rotor structure, the first pressure plate 2 and the second pressure plate 4 are respectively fixed to the two ends of the surface-mounted core group 3 structure. Therefore, this embodiment uses rivet holes instead of threaded holes, which reduces the processing difficulty of the surface-mounted core group 3 structure and thus reduces the processing cost, and also avoids the counterweight structure (rivet) from being easily loosened.
[0067] In some embodiments, the rivet holes are replaced with pin holes, and the rivets are replaced with pins.
[0068] In this embodiment, each of the core groups 3 is subjected to dynamic balancing calibration in turn; After any core group 3 completes dynamic balancing, it is immediately assembled with the rotor shaft 1. This arrangement conserves dynamic balancing equipment while accelerating assembly, striking a balance between cost savings and ensuring rotor processing progress. The term "immediately" is not a time limit; it emphasizes that a core group 3 that has completed dynamic balancing does not need to wait for the remaining core groups 3.
[0069] See also Figure 13-14 In this embodiment, the outer diameters of the second carbon fiber layer 6, the first pressing plate 2 and the second pressing plate 4 are the same or close.
[0070] For example, if the second carbon fiber layer 6 and the first pressure plate 2 have the same outer diameter, this not only improves the utilization of the rotor's radial space, but also offers other benefits. For example, the outer surface of the second carbon fiber layer 6 forms a continuous support surface with the outer surface of the first pressure plate 2, avoiding stress concentration caused by dimensional differences. The outer diameters of the second carbon fiber layer 6 and the first pressure plate 2 can be close, for example, with a millimeter-level deviation. The specific range of closeness is not limited.
[0071] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.
Claims
1. A rotor processing method based on dual guarantees of dynamic balancing and magnetizing performance, with respect to a rotor structure, wherein the rotor structure comprises a rotating shaft (1), a first pressure plate (2), a plurality of core groups (3), and a second pressure plate (4), wherein the core group (3) comprises a rotor core and magnetic steel; and wherein: Rotor processing methods include: Performing dynamic balancing calibration on the rotating shaft (1), and adjusting and calibrating according to the unbalanced mass and position of the rotating shaft (1); Performing dynamic balancing calibration on the first pressing plate (2), and then assembling the first pressing plate (2) with the rotating shaft (1) after dynamic balancing calibration; Performing dynamic balancing calibration on each of the core groups (3), adjusting and calibrating according to the unbalanced mass and position of each of the core groups (3), and then assembling each of the core groups (3) with the rotating shaft (1) after dynamic balancing calibration; Performing dynamic balancing calibration on the second pressing plate (4), and then assembling the second pressing plate (4) with the rotating shaft (1) after dynamic balancing calibration; Performing a first-stage winding operation using carbon fiber to form a first carbon fiber layer (5) on the outside of each of the core groups (3); When the thickness of the first carbon fiber layer (5) reaches a first predetermined thickness, the winding operation is terminated, each of the iron core groups (3) is magnetized, and the first predetermined thickness is adjusted by summarizing the magnetization performance test results of each of the iron core groups (3); After magnetization, a second stage of winding operation is performed using carbon fibers to form a second carbon fiber layer (6) outside the first carbon fiber layer (5); When the thickness of the second carbon fiber layer (6) reaches a second predetermined thickness, the winding operation is terminated, and then the rotor structure as a whole is subjected to dynamic balancing calibration, so that the balancing quality of the rotor structure as a whole at different positions in the axial direction remains consistent.
2. The rotor processing method based on the dual guarantee of dynamic balancing and magnetizing performance according to claim 1 is characterized in that: The steps of assembling the rotor structure in the rotor processing method include: Step 1: Assemble the first pressing plate (2) and the rotating shaft (1); Step 2: Assembling each of the iron core groups (3) with the rotating shaft (1); Step 3: Assemble the second pressing plate (4) and the rotating shaft (1); Step 4: Use carbon fiber to perform winding operation.
3. The rotor processing method based on dual guarantee of dynamic balancing and magnetizing performance according to claim 1, characterized in that: A plurality of first threaded holes (11) are provided at both axial ends of the rotating shaft (1) and are evenly distributed around the axis of the rotating shaft (1); The step of performing dynamic balancing calibration on the rotating shaft (1) comprises: Performing a dynamic balance test on the rotating shaft (1) using a dynamic balance test device; At least one first screw is threadedly assembled with a portion of the first threaded holes (11) according to the dynamic balance test result.
4. The rotor processing method based on dual guarantee of dynamic balancing and magnetizing performance according to claim 1 is characterized in that: The first pressing plate (2) is provided with a plurality of second threaded holes (21) uniformly distributed around the axis of the first pressing plate (2), and the second pressing plate (4) is provided with a plurality of third threaded holes (41) uniformly distributed around the axis of the second pressing plate (4); The step of performing dynamic balancing calibration on the first pressure plate (2) comprises: Performing a dynamic balance test on the first pressing plate (2) using a dynamic balance test device; Threading at least one second screw into a portion of the second threaded hole (21) according to the dynamic balance test result; The step of performing dynamic balancing calibration on the second pressure plate (4) comprises: Performing a dynamic balance test on the second pressing plate (4) using a dynamic balance test device; At least one third screw is threadedly assembled with part of the third threaded hole (41) according to the dynamic balance test result.
5. The rotor processing method based on dual guarantee of dynamic balancing and magnetizing performance according to claim 1 is characterized in that: Each of the iron core groups (3) is provided with a plurality of rivet holes evenly distributed around the axis of the iron core group (3); The step of performing dynamic balancing calibration on the core group (3) comprises: Performing a dynamic balance test on the core group (3) using a dynamic balance test device; At least one rivet is fixedly assembled with part of the rivet holes according to the dynamic balance test result.
6. The rotor processing method based on dual guarantee of dynamic balance and magnetization performance according to claim 1, characterized in that: Each of the iron core groups (3) is subjected to dynamic balancing calibration in turn; When any of the iron core groups (3) completes dynamic balancing calibration, it is immediately assembled with the rotating shaft (1).
7. The rotor processing method based on dual guarantee of dynamic balancing and magnetizing performance according to claim 1 is characterized in that: The second carbon fiber layer (6), the first pressing plate (2) and the second pressing plate (4) have the same or similar outer diameters.