Shield motor rotor structure
By wrapping Kevlar rope around the motor rotor and potting it with epoxy, combined with a thin sheath and heat dissipation ring design, the problems of magnet damage and eddy current loss in the rotor sealing structure during high-speed rotation are solved, achieving a lightweight and efficient heat dissipation motor rotor structure.
Patent Information
- Application Number
- CN202422936480.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing motor rotor sealing structures are prone to magnet damage during high-speed rotation, increasing rotor weight and eddy current losses, and reducing motor efficiency and rotational inertia.
The magnet is wrapped with Kevlar rope and encapsulated with epoxy resin. Combined with a thin rotor sheath and heat dissipation ring design, the rotor weight and eddy current loss are reduced, and the sealing and heat dissipation performance are enhanced.
A lightweight rotor structure has been achieved, which improves the motor's waterproofness and heat dissipation efficiency, reduces the impact of high temperature on the magnets, and is suitable for high-speed rotating workpieces.
Smart Images
Figure CN223502640U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor structure technology, specifically a shielded motor rotor structure. Background Technology
[0002] The motor rotor is the rotating part of a motor. It is an important component of the motor and is used to convert electrical energy into mechanical energy. According to the type of motor, motor rotors can be divided into motor rotors and generator rotors. In addition, motor rotors can also be divided into internal rotor rotation mode and external rotor rotation mode according to the different rotation modes. The internal rotor rotation mode means that the core in the middle of the motor is the rotating body, while the external rotor rotation mode means that the outer body of the motor is the rotating body.
[0003] However, the current rotor seal mainly uses a sheath added to the outer surface of the magnet, which requires welding on both sides of the end plate or spraying the surface of the magnet. The protective effect is generally poor and it is not suitable for high-speed rotating workpieces. In order to prevent the welding temperature from entering the magnet and causing damage to the magnet, the end plate height must be high and the sheath must be thick, which greatly increases the rotor weight and eddy current loss, thereby reducing motor efficiency and rotational inertia.
[0004] Therefore, the rotor seal design needs to be modified to reduce rotor weight and eddy current losses. Utility Model Content
[0005] The purpose of this utility model is to provide a shielded motor rotor structure to solve the problems mentioned in the background art. Currently, rotor seals mainly use a sheath added to the outer surface of the magnet, which requires welding on both sides of the end plate or spraying the surface of the magnet. The protective effect is generally poor and it is not suitable for high-speed rotating workpieces. In order to prevent the welding temperature from entering the magnet and causing damage to the magnet, the end plate height must be high and the sheath must be thick, which greatly increases the rotor weight, increases eddy current loss, and thus reduces motor efficiency and rotational inertia.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a shielded motor rotor structure, comprising: a rotating shaft;
[0007] Also includes:
[0008] A connecting mechanism is provided on the outside of the rotating shaft. The connecting mechanism includes a magnet, a Kevlar rope, and epoxy resin. The right end of the Kevlar rope is fixedly connected to the right side of the magnet, and the left end of the Kevlar rope is fixedly connected to the left side of the magnet.
[0009] A heat dissipation mechanism is provided on the left side of the rotating shaft. The heat dissipation mechanism includes a heat dissipation ring, mounting holes, and fastening bolts. The mounting holes are opened inside the heat dissipation ring and are distributed in an array.
[0010] Preferably, a magnet is provided on the outer side of the rotating shaft, and a Kevlar rope is wound and connected to the magnet, and the Kevlar rope is fixedly connected to the epoxy resin.
[0011] Preferably, the magnet is slidably connected to the rotor sheath, and a heat dissipation ring is slidably connected to the left side of the outer side of the rotating shaft.
[0012] Preferably, the outer side of the heat dissipation ring is provided with heat dissipation fins, and the heat dissipation fins are distributed in an array.
[0013] Preferably, the heat dissipation ring has an inclined groove on its left side, and the inclined grooves are arranged in an array, and the inclined grooves are symmetrical about the vertical central axis of the heat dissipation ring.
[0014] Preferably, the mounting holes are threadedly connected to the fastening bolts, and the mounting holes correspond one-to-one with the fastening bolts.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The rotor structure of the shielded motor is a rotor structure in which Kevlar rope is first wound around and then pressed into the rotor sheath after potting. This structure reduces the rotor weight, increases the rotor's sealing performance, and makes the rotor waterproof. In addition, the rotor sheath is thinner, which reduces eddy current losses caused by excessively thick rotor sheaths. It also reduces the impact of high-temperature welding on the performance of the magnets. The heat dissipation fins and inclined grooves on the outside of the heat dissipation ring can accelerate the evaporation of heat from the shaft, prevent high temperature from affecting the shaft, and protect the shaft.
[0016] 1. It is equipped with a rotating shaft, magnets and Kevlar ropes. The magnets are located on the outside of the rotating shaft, and Kevlar ropes are wound around the outside of the magnets, which reduces the weight of the rotor, increases the sealing of the rotor, and makes the rotor waterproof.
[0017] 2. It is equipped with magnets, Kevlar ropes and epoxy. After the Kevlar ropes are wrapped around the outside of the magnets, the epoxy is filled into the magnets and Kevlar ropes and then pressed into the rotor sheath. The rotor sheath is thin, which reduces the impact of high-temperature welding on the performance of the magnets and also reduces eddy current losses.
[0018] 3. It is equipped with a heat dissipation ring, heat dissipation fins and inclined grooves. The heat dissipation ring is connected to the outside of the rotating shaft through mounting holes and fastening bolts. The heat dissipation fins and inclined grooves on the outside of the heat dissipation ring can accelerate the dissipation of heat from the rotating shaft, prevent high temperature from affecting the rotating shaft and protect the rotating shaft. Attached Figure Description
[0019] Figure 1 This is a front view structural diagram of the present invention;
[0020] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;
[0021] Figure 3This is a three-dimensional structural diagram of the heat dissipation ring of this utility model;
[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the heat dissipation ring of this utility model.
[0023] In the diagram: 1. Shaft; 2. Magnet; 3. Kevlar rope; 4. Epoxy resin; 5. Rotor sheath; 6. Heat sink ring; 7. Heat sink fins; 8. Inclined groove; 9. Mounting hole; 10. Fastening bolt. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1
[0026] This embodiment is a shielded motor rotor structure.
[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a magnet 2 is provided on the outer side of the rotating shaft 1. A Kevlar rope 3 is wound and connected to the magnet 2. The right end of the Kevlar rope 3 is fixedly connected to the right side of the outer side of the magnet 2, and the left end of the Kevlar rope 3 is fixedly connected to the left side of the outer side of the magnet 2. The Kevlar rope 3 is fixedly connected to the epoxy 4. The magnet 2 is slidably connected to the rotor sleeve 5. A heat dissipation ring 6 is slidably connected to the left side of the outer side of the rotating shaft 1. Heat dissipation fins 7 are provided on the outer side of the heat dissipation ring 6. The heat dissipation fins 7 are arranged in an array. An inclined groove 8 is opened on the left side of the heat dissipation ring 6. The inclined grooves 8 are arranged in an array and are symmetrical about the vertical central axis of the heat dissipation ring 6. Mounting holes 9 are opened inside the heat dissipation ring 6. The mounting holes 9 are arranged in an array and are threadedly connected to fastening bolts 10. The mounting holes 9 and fastening bolts 10 correspond one-to-one.
[0028] It should be noted that the usage of this structure is as follows: the assembly of the rotating shaft 1 and the magnet 2 is first wound with Kevlar rope 3, then potted with epoxy 4, and then heat-pressed into the rotor sleeve 5. In addition, in order to prevent the sleeve from moving back and forth, the sleeve is treated with rotating flange. Specific Implementation Example 2
[0030] This embodiment is designed to address the problem that the protective effect is generally poor and it is not suitable for high-speed rotating workpieces.
[0031] like Figure 1 and Figure 2As shown, Kevlar rope 3 is wrapped around the outside of magnet 2 and then potted, which reduces the weight of the rotor, increases the sealing performance of the rotor, and makes the rotor waterproof, making it suitable for high-speed rotating workpieces.
[0032] Since the conventional method involves welding, the welding temperature will be transmitted to the magnet 2, causing damage to the magnet 2. It also requires a high end plate height and a thick sheath, which not only increases the rotor weight but also increases eddy current losses, thereby reducing motor efficiency and rotational inertia. Therefore, after the Kevlar rope 3 is wrapped around the outside of the magnet 2, it ensures that the rotor magnet 2 will not fall off. After the epoxy 4 is filled with the magnet 2 and the Kevlar rope 3, it is pressed into the rotor sheath 5. The rotor sheath 5 is thinner, which reduces the impact of high-temperature welding on the performance of the magnet 2 and also reduces eddy current losses. The rotor is integrated into one piece, and during major overhaul, only the rotor needs to be replaced, which is convenient. Specific Implementation Example 3
[0034] This embodiment is designed to address the problem of poor heat dissipation during operation.
[0035] like Figure 3 and Figure 4 As shown, during use, since one end of the rotating shaft 1 is located inside the motor and the other end is located outside the motor, the heat dissipation ring 6 is slidably connected to the outer side of the rotating shaft 1. Then, the fastening bolt 10 is rotated so that the inner end of the fastening bolt 10 is tightly fitted to the rotating shaft 1. At this time, the heat dissipation ring 6 is fixedly connected to the rotating shaft 1. The outer side of the heat dissipation ring 6 is provided with heat dissipation fins 7, which can accelerate the evaporation of heat from the rotating shaft 1. In addition, the inclined groove 8 is inclined. When the heat dissipation ring 6 rotates with the rotating shaft 1, the outside air will fill into the inclined groove 8 and then be discharged from the outside of the inclined groove 8. Therefore, the inclined groove 8 can further accelerate the evaporation of heat from the rotating shaft 1, prevent high temperature from affecting the rotating shaft 1, and protect the rotating shaft 1.
[0036] The contents not described in detail in this specification are existing technologies known to those skilled in the art. All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A shielded motor rotor structure, comprising: Shaft (1); Its characteristic is that it further includes: A connecting mechanism is provided on the outside of the rotating shaft (1), wherein the connecting mechanism includes a magnet (2), a Kevlar rope (3) and an epoxy resin (4). The right end of the Kevlar rope (3) is fixedly connected to the right side of the magnet (2), and the left end of the Kevlar rope (3) is fixedly connected to the left side of the magnet (2). A heat dissipation mechanism is provided on the left side of the rotating shaft (1), which includes a heat dissipation ring (6), mounting holes (9) and fastening bolts (10). The mounting holes (9) are opened inside the heat dissipation ring (6) and are arranged in an array.
2. The shielded motor rotor structure according to claim 1, characterized in that: A magnet (2) is provided on the outside of the rotating shaft (1), and a Kevlar rope (3) is wound and connected to the magnet (2), and the Kevlar rope (3) is fixedly connected to the epoxy (4).
3. The shielded motor rotor structure according to claim 1, characterized in that: The magnet (2) is slidably connected to the rotor sheath (5), and a heat dissipation ring (6) is slidably connected to the left side of the outer side of the rotating shaft (1).
4. The shielded motor rotor structure according to claim 3, characterized in that: The heat dissipation ring (6) is provided with heat dissipation fins (7) on its outer side, and the heat dissipation fins (7) are arranged in an array.
5. A shielded motor rotor structure according to claim 4, characterized in that: An inclined groove (8) is provided on the left side of the heat dissipation ring (6), and the inclined groove (8) is arranged in an array. The inclined groove (8) is symmetrical about the vertical central axis of the heat dissipation ring (6).
6. The shielded motor rotor structure according to claim 1, characterized in that: The mounting hole (9) is threadedly connected to the fastening bolt (10), and the mounting hole (9) corresponds one-to-one with the fastening bolt (10).