Dynamic balance structure of noise reduction motor
By setting a plastic balancing ring on the outer wall of the rotor housing and combining injection molding and structural design, the problems of increased initial imbalance and assembly complexity in existing motor dynamic balancing methods are solved, and fast and efficient dynamic balancing of the motor is achieved.
Patent Information
- Application Number
- CN202422494065.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-15
AI Technical Summary
Existing motor dynamic balancing methods increase the initial imbalance and assembly complexity, making it difficult to meet dynamic balancing requirements at high speeds.
A plastic balancing ring is fixed on the outer wall of the rotor housing and installed by one-piece injection molding or bonding. It combines concave and convex ring structures, has a stepped surface and reinforcing ribs on the inner circumference, and is filled with balancing mud to achieve rapid dynamic balancing.
It effectively reduces the initial imbalance of the rotor assembly, improves the dynamic balancing performance, facilitates rapid balancing of the motor, and reduces assembly complexity.
Smart Images
Figure CN223402330U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of electric fans, and particularly relates to a dynamic balancing structure of a noise-reducing motor. Background Art
[0002] Balancing a motor is an essential step in the motor manufacturing process. As motor speeds increase, the requirements for dynamic balance become increasingly stringent. Consequently, higher requirements are placed on the dynamic balancing solution and accuracy. Current balancing methods typically involve adding or removing metal blocks or adding a metal balancing ring to the rotor shaft. However, this type of balancing not only increases the motor's initial imbalance but also complicates assembly.
[0003] Therefore, the applicant hopes to seek technical solutions to solve the above technical problems. Summary of the Invention
[0004] In view of this, the purpose of the present invention is to provide a dynamic balancing structure for a noise-reducing motor, which effectively reduces the initial imbalance of the rotor assembly and facilitates rapid dynamic balancing of the motor.
[0005] The technical solutions adopted in this utility model are as follows:
[0006] A dynamic balancing structure of a noise reduction motor includes a stator assembly and a rotor assembly located on the outer periphery of the stator assembly. The rotor assembly includes a rotor shell and magnets located on the inner wall of the rotor shell, wherein a balancing ring is fixedly provided on the outer wall of the rotor shell.
[0007] Preferably, the rotor housing and the balance ring are integrally injection molded.
[0008] Preferably, the balancing ring is injection molded and fixedly bonded to the outer wall surface of the rotor housing.
[0009] Preferably, a concave water slinger ring is provided on the periphery of an outer end of the rotor housing.
[0010] Preferably, the outer periphery of the rotor housing is provided with a convex ring extending toward the outer periphery, the concave water-slinging ring is located at the same end of the rotor housing, and the convex ring is located at the outer end of the concave water-slinging ring.
[0011] Preferably, the balance ring and the convex ring are fixedly embedded as one body.
[0012] Preferably, a step surface is provided on the inner circumference of the balancing ring, so that the balancing ring has a balancing ring contact section that contacts and fits with the outer wall surface of the rotor housing, and a balancing ring gap section that has a clearance fit with the outer wall surface of the rotor housing.
[0013] Preferably, the gap between the balancing ring gap section and the outer wall surface of the rotor housing is filled with balancing mud.
[0014] Preferably, a plurality of reinforcing ribs distributed at intervals are provided between the step surface and the balance ring gap section.
[0015] Preferably, the noise reduction motor is a volute motor, which includes a motor casing and a moving impeller; wherein the stator assembly is fixedly mounted on the outside of the motor casing, and the motor shaft of the rotor assembly extends into the interior of the motor casing and is fixedly mounted and connected to the moving impeller.
[0016] The present application effectively reduces the initial imbalance of the rotor assembly by fixing a balance ring structure on the outer wall surface of the rotor housing, thereby facilitating the rapid dynamic balancing of the motor; wherein, the balance ring in the present application is preferably made of plastic material, which is lighter than metal material, and can further effectively reduce the initial imbalance of the rotor assembly under the same assembly tolerance, thereby further improving the dynamic balancing performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the dynamic balancing structure of the noise reduction motor according to a specific embodiment of the present utility model;
[0018] Figure 2 yes Figure 1 Schematic diagram of the top view structure;
[0019] Figure 3 yes Figure 1 sectional view of
[0020] Figure 4 It is a schematic diagram of the assembly structure of the lower rotor assembly and the balance ring according to a specific embodiment of the present utility model. DETAILED DESCRIPTION
[0021] An embodiment of the utility model discloses a dynamic balancing structure of a noise reduction motor, comprising a stator assembly and a rotor assembly located on the outer periphery of the stator assembly, the rotor assembly comprising a rotor shell and magnetic steel located on the inner wall of the rotor shell, wherein a balancing ring is fixedly provided on the outer wall of the rotor shell.
[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.
[0023] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a dynamic balancing structure of a noise reduction motor includes a stator assembly 1 and a rotor assembly 2 located on the outer periphery of the stator assembly 1, the rotor assembly 2 includes a rotor housing 21 and a magnet 22 (usually a permanent magnet) located on the inner wall of the rotor housing 21, wherein a balancing ring 3 is fixedly provided on the outer wall of the rotor housing 21; preferably, in this embodiment, the noise reduction motor is a volute motor, and the volute motor includes a motor housing 4 and a moving impeller 5; wherein the stator assembly 1 is fixedly installed on the outside of the motor housing 4, and the motor shaft 23 of the rotor assembly 2 extends into the interior of the motor housing 4 and is fixedly installed and connected to the moving impeller 5.
[0024] Preferably, in this embodiment, the rotor housing 21 and the balance ring 3 are integrally injection molded; in other embodiments, the balance ring 3 can also be injection molded and then fixed on the outer wall surface of the rotor housing 21 by fixed bonding. This application does not impose any special restrictions during implementation.
[0025] Preferably, in this embodiment, a concave water-slinging ring 24 is provided on the periphery of an outer end of the rotor housing 21. The structure of the concave water-slinging ring 24 can effectively prevent water on the outer surface of the rotor housing 21 from entering the interior of the volute motor when the volute motor is running, thereby achieving a certain degree of waterproof effect on the volute motor.
[0026] Preferably, in order to enhance the installation strength of the balancing ring 3, in this embodiment, the outer periphery of the rotor housing 21 is provided with a convex ring 25 extending toward the outer periphery, the concave water-slinging ring 24 is located at the same end of the rotor housing 21, and the convex ring 25 is located at the outer end of the concave water-slinging ring 24; preferably, the balancing ring 3 and the convex ring 25 are fixed and embedded as one by injection molding.
[0027] Preferably, in order to improve the installation strength of the balance ring 3 and at the same time facilitate obtaining a faster dynamic balancing effect, in this embodiment, a step surface 31 is provided on the inner circumference of the balance ring 3, so that the balance ring 3 has a balance ring contact section 3a that contacts and fits with the outer wall surface of the rotor housing 21, and a balance ring gap section 3b that has a clearance fit with the outer wall surface of the rotor housing 21; further preferably, in this embodiment, the gap between the balance ring gap section 3b and the outer wall surface of the rotor housing 21 is filled with balancing mud (not shown in the figure), which can promote the rotor assembly 2 of the motor to quickly reach a dynamic balance state and have high dynamic balancing efficiency; further preferably, in this embodiment, a number of reinforcing ribs 32 distributed at intervals are provided between the step surface 31 and the balance ring gap section 3b.
[0028] This embodiment can effectively reduce the initial imbalance of the rotor assembly 2 by fixing a balance ring 3 structure made of plastic material on the outer wall surface of the rotor housing 21, so that the volute motor can achieve dynamic balance quickly and efficiently, which is beneficial to the noise reduction effect of the volute motor.
[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method includes only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A dynamic balancing structure for a noise reduction motor, comprising a stator assembly and a rotor assembly located on the periphery of the stator assembly, characterized in that: The rotor assembly includes a rotor housing and a magnetic steel located on the inner wall of the rotor housing, wherein a balance ring is fixedly provided on the outer wall of the rotor housing; and a concave water-slinging ring is provided on the periphery of an outer end of the rotor housing.
2. The dynamic balancing structure of the noise reduction motor according to claim 1, characterized in that: The rotor housing and the balance ring are integrally injection molded.
3. The dynamic balancing structure of the noise reduction motor according to claim 1, characterized in that: The balancing ring is injection molded and fixedly bonded to the outer wall surface of the rotor housing.
4. The dynamic balancing structure of the noise reduction motor according to claim 1, characterized in that: The outer periphery of the rotor housing is provided with a convex ring extending toward the outer periphery. The concave water-slinging ring is located at the same end of the rotor housing, and the convex ring is located at the outer end of the concave water-slinging ring.
5. The dynamic balancing structure of the noise reduction motor according to claim 4, characterized in that: The balancing ring and the convex ring are fixedly embedded into one body.
6. The dynamic balancing structure of the noise reduction motor according to claim 1, characterized in that: The inner circumference of the balancing ring is provided with a step surface, so that the balancing ring has a balancing ring contact section that contacts and matches the outer wall surface of the rotor housing, and a balancing ring gap section that has a clearance fit with the outer wall surface of the rotor housing.
7. The dynamic balancing structure of the noise reduction motor according to claim 6, characterized in that: The gap between the balancing ring gap section and the outer wall surface of the rotor housing is filled with balancing mud.
8. The dynamic balancing structure of the noise reduction motor according to claim 6, characterized in that: A plurality of reinforcing ribs distributed at intervals are provided between the step surface and the balance ring gap section.
9. The dynamic balancing structure of the noise reduction motor according to claim 1, characterized in that: The noise reduction motor is a volute motor, which includes a motor casing and a moving impeller; wherein the stator assembly is fixedly mounted on the outside of the motor casing, and the motor shaft of the rotor assembly extends into the interior of the motor casing and is fixedly mounted and connected to the moving impeller.