Rotor structure and motor
By setting an anti-detachment structure on the balance ring of the motor rotor structure, the three-axis coordinated limit is achieved, the problem of balanced mud falling off is solved, and the accuracy of dynamic balance calibration and the operation balance and service life of the motor are improved.
Patent Information
- Application Number
- CN202421409012.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-19
AI Technical Summary
During the dynamic balance calibration process of existing motor rotors, the balanced mud is prone to fall off, resulting in a dynamic balance misalignment, affecting the motor's operation balance and service life.
A rotor structure is designed, including a rotor shaft, a rotor core and a balance ring. An anti-detachment structure is provided on the balance ring. The counterweight is connected to the anti-detachment structure. The anti-detachment structure provides radial, circumferential and axial resistance, achieving three-axis coordinated limits to prevent the counterweight from falling off.
Through the design of the anti-detachment structure, the accuracy of dynamic balance calibration is significantly improved, and the operation balance and service life of the motor are enhanced.
Smart Images
Figure CN222691514U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a rotor structure and a motor. Background Art
[0002] Existing motor rotors are unbalanced due to factors such as uneven materials, process errors, uneven deformation / uneven wear / local block loss of rotor blades. Rotor imbalance is the main source of excitation for the engine, which can easily cause rotor vibration, accelerate the wear of bearings, shaft seals and other components, and reduce the service life and operating efficiency of the machine. For this reason, the rotor needs to be dynamically balanced. Dynamic balancing correction is generally divided into weight removal and weight gain. The weight gain method uses balancing mud to adhere to the rotor to reduce the rotor vibration caused by the eccentric force of the center of mass or the dynamic load acting on the bearing to within the allowable range, thereby achieving the purpose of smooth operation of the engine.
[0003] In the prior art, the balancing mud is usually adhered to the balancing ring. Such a setting has the following problems in the actual production process, resulting in dynamic balancing inaccuracy:
[0004] 1. During the dynamic balancing calibration process, the balancing mud that has not been completely solidified is easily affected by the centrifugal force generated by the dynamic balancing calibration, resulting in the problem of the balancing mud falling off and being thrown out.
[0005] 2. The surface of the balance ring is easily contaminated by dirt, which leads to a decrease in surface adhesion and the balance mud is prone to fall off during dynamic balancing calibration or motor operation.
[0006] 3. When the motor is working, it will generate high temperature, which will cause the balance mud to expand and contract due to heat and cold, resulting in deformation, or accelerate the aging and deformation of the balance mud, or the aged balance mud will be more likely to fall off and be thrown out during operation.
[0007] It should be noted that the information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to a person skilled in the art. Utility Model Content
[0008] In order to solve the technical problem that the balancing mud is easy to fall off, the utility model provides a rotor structure, which includes a rotating shaft, a rotor core and a balancing ring.
[0009] The rotor core is sleeved on the rotating shaft, the balance ring is sleeved on the rotating shaft, one end of the balance ring is connected to the rotor core, the other end of the balance ring is provided with an anti-slip structure, the balance ring is provided with a counterweight, the counterweight is connected to the anti-slip structure, and the anti-slip structure can limit the counterweight.
[0010] Furthermore, the anti-slip structure includes a first groove and a retaining ring, the first groove is arranged in a ring shape along the circumferential direction of the balance ring, the retaining ring is connected to the first groove, the retaining ring is located on the side of the first groove away from the rotating shaft, the retaining ring protrudes from the balance ring, and the first groove and the retaining ring are respectively connected to the counterweight.
[0011] Furthermore, the retaining ring and the balancing ring are of integrated design.
[0012] Furthermore, the anti-slip structure also includes a second groove, the second groove is arranged in the first groove, there are multiple second grooves, and the multiple second grooves are distributed in the first groove at equal intervals.
[0013] Furthermore, a depth of the second groove is greater than a depth of the first groove.
[0014] Furthermore, the distance between two adjacent second grooves is 5.5 mm.
[0015] Furthermore, a third groove is formed on the retaining ring, and the third groove is located on a side of the retaining ring facing the first groove.
[0016] Furthermore, the third groove is perpendicular to the first groove.
[0017] Furthermore, there are two balancing rings, which are respectively sleeved on the rotating shaft, and are respectively located at two ends of the rotor core and connected to the rotor core.
[0018] Furthermore, the utility model also provides a motor, comprising any one of the rotor structures described above.
[0019] Based on the above, compared with the prior art, the rotor structure and motor provided by the utility model, by arranging an anti-slip structure on the balance ring, the counterweight is connected to the anti-slip structure when installed on the balance ring, and the anti-slip structure can provide radial, circumferential and axial resistance to the counterweight, thereby achieving the effect of three-axis coordinated limiting, thereby preventing the counterweight from falling off or being thrown out, greatly improving the accuracy of dynamic balancing calibration, and thereby improving the operating balance and service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. The positional relationship described in the drawings in the following description is based on the direction of the components in the drawings unless otherwise specified.
[0021] Figure 1 A schematic diagram of a rotor structure provided in one embodiment of the utility model;
[0022] Figure 2 A schematic diagram of the structure of a balance ring provided in one embodiment of the utility model;
[0023] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;
[0024] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at N in the figure.
[0025] Reference numerals:
[0026] 10-rotating shaft 20-rotor core 30-balance ring
[0027] 40-anti-slip structure 50-counterweight 41-first groove
[0028] 42- retaining ring 43- second groove 44- third groove DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof all mean "at least including".
[0031] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of a rotor structure provided in one embodiment of the utility model; Figure 2 A schematic structural diagram of a balance ring provided in one embodiment of the utility model.
[0032] In order to solve the technical problem that the balancing mud is easy to fall off, or to achieve at least one of the above advantages or other advantages, an embodiment of the utility model provides a rotor structure. As shown in the figure, the rotor structure includes a rotating shaft 10, a rotor core 20 and a balancing ring 30. The rotor core 20 is sleeved on the rotating shaft 10, and the rotor core 20 and the rotating shaft 10 are transmission-connected.
[0033] The balance ring 30 is sleeved on the rotating shaft 10. One end of the balance ring 30 is connected to the rotor core 20, and the other end of the balance ring 30 is provided with an anti-drop structure 40. The balance ring 30 is provided with a counterweight 50, and the counterweight 50 is connected to the anti-drop structure 40. The anti-drop structure 40 can limit the counterweight 50 to prevent the counterweight 50 from falling off.
[0034] Preferably, the counterweight 50 is balancing mud.
[0035] During specific implementation, the balance ring 30 is shrink-fitted and fixed on the rotating shaft 10. One end of the balance ring 30 is fixedly connected to the rotor core 20, and the other end is provided with an anti-slip structure 40 and a counterweight 50. The anti-slip structure 40 includes a first groove 41 and a retaining ring 42. The first groove 41 is arranged in a ring shape along the circumferential direction of the balance ring 30, and is located at the outer edge of the balance ring 30. The retaining ring 42 is connected to the first groove 41, and is located on the side of the first groove 41 away from the rotating shaft 10. The height of the retaining ring 42 protrudes from the balance ring 30, which can better block the counterweight 50 and prevent the counterweight 50 from being thrown out after falling off.
[0036] The counterweight 50 is connected to the first groove 41 and the retaining ring 42 respectively. When the rotor rotates, the first groove 41 and the retaining ring 42 can radially fix the counterweight 50 to prevent the counterweight 50 from falling off or being thrown out, thereby achieving a physical anti-falling effect. Preferably, the retaining ring 42 and the balance ring 30 are of an integrated design.
[0037] On the basis of the above, the anti-slip structure 40 further includes a second groove 43. In specific implementation, the second groove 43 is arranged in the first groove 41. There are multiple second grooves 43, and the multiple second grooves 43 are distributed in the first groove 41 at equal intervals.
[0038] Preferably, the depth of the second groove 43 is greater than the depth of the first groove 41. When the rotor rotates, since the depth of the second groove 43 is greater than the first groove 41, the second groove 43 can provide circumferential resistance to the counterweight 50, thereby preventing the counterweight 50 from being displaced along the circumferential direction of the balance ring 30, and cooperates with the first groove 41 and the retaining ring 42 to achieve synchronous radial and circumferential limiting, further improving the anti-slip effect.
[0039] It is understandable that the depth of the second groove 43 may also be less than the depth of the first groove 41, that is, the second groove 43 is convex relative to the first groove 41. At this time, when the counterweight 50 adheres to the first groove 41 and the second groove 43, the second groove 43 can also provide circumferential resistance to the counterweight 50, preventing the counterweight 50 from being displaced along the circumferential direction of the balance ring 30, and cooperates with the first groove 41 and the retaining ring 42 to achieve synchronous radial and circumferential limiting, further improving the anti-slip effect.
[0040] In some preferred embodiments, the spacing between two adjacent second grooves 43 is 5.5 mm. It is understandable that, in a specific implementation, the spacing between adjacent second grooves 43 can be adjusted according to actual production requirements, and this case is not limited thereto.
[0041] In some preferred embodiments, a third groove 44 is formed on the retaining ring 42. In specific implementation, the third groove 44 is located on a side of the retaining ring 42 adjacent to the first groove 41, and the third groove 44 is perpendicular to the first groove 41. During the installation of the counterweight 50, the counterweight 50 can be deformed according to the shapes of the first groove 41, the second groove 43 and the third groove 44, and completely fit the first groove 41, the second groove 43 and the third groove 44. When the rotor rotates, the third groove 44 can provide axial resistance to the counterweight 50 to prevent the counterweight 50 from falling off in the axial direction, and cooperate with the first groove, the retaining ring 42 and the second groove 43 to achieve synchronous limiting of the radial, circumferential and axial directions, so that the counterweight 50 is firmly adhered to the balance ring 30.
[0042] In some preferred embodiments, there are two balancing rings 30 . The two balancing rings 30 are respectively sleeved on the rotating shaft 10 , and the two balancing rings 30 are respectively located at two ends of the rotor core 20 and connected to the rotor core 20 .
[0043] In some preferred embodiments, the utility model further provides a motor, comprising the rotor structure as described above.
[0044] To sum up, compared with the prior art, the rotor structure and motor provided by the utility model, by arranging an anti-slip structure on the balance ring, the counterweight is connected to the anti-slip structure when installed on the balance ring, the anti-slip structure can provide radial, circumferential and axial resistance to the counterweight, achieve the effect of three-axis coordinated limiting, and achieve the purpose of preventing the counterweight from falling off or being thrown out, which greatly improves the accuracy of dynamic balancing calibration, and thus improves the operating balance and service life of the motor.
[0045] Although the terms such as first groove, second groove, third groove, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.
[0046] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the utility model can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A rotor structure, characterized in that: include Rotating shaft; A rotor core, wherein the rotor core is sleeved on the rotating shaft; A balancing ring, wherein the balancing ring is sleeved on the rotating shaft, one end of the balancing ring is connected to the rotor core, an anti-slip structure is provided on the other end of the balancing ring, a counterweight is provided on the balancing ring, the counterweight is connected to the anti-slip structure, and the anti-slip structure can limit the counterweight.
2. The rotor structure according to claim 1, characterized in that: The anti-slip structure includes a first groove and a retaining ring. The first groove is arranged in a ring shape along the circumferential direction of the balance ring. The retaining ring is connected to the first groove. The retaining ring is located on the side of the first groove away from the rotating shaft. The retaining ring protrudes from the balance ring. The first groove and the retaining ring are respectively connected to the counterweight.
3. The rotor structure according to claim 2, characterized in that: The retaining ring and the balancing ring are designed as an integral unit.
4. The rotor structure according to claim 2, characterized in that: The anti-slip structure further includes a second groove, which is arranged in the first groove. There are a plurality of second grooves, and the plurality of second grooves are evenly spaced and distributed in the first groove.
5. The rotor structure according to claim 4, characterized in that: The depth of the second groove is greater than the depth of the first groove.
6. The rotor structure according to claim 4, characterized in that: The distance between two adjacent second grooves is 5.5 mm.
7. The rotor structure according to claim 2, characterized in that: The retaining ring is provided with a third groove, and the third groove is located on a side of the retaining ring facing the first groove.
8. The rotor structure according to claim 7, characterized in that: The third trench is perpendicular to the first trench.
9. The rotor structure according to claim 1, characterized in that: There are two balancing rings, which are respectively sleeved on the rotating shaft, and are respectively located at two ends of the rotor core and connected to the rotor core.
10. A motor, characterized in that: It comprises a rotor structure as described in any one of claims 1 to 9.