Heat dissipation sleeve of permanent magnet motor
By designing a heat dissipation sleeve with water flow channels and flow guide grooves in a permanent magnet motor, the problem of poor heat dissipation performance is solved, uniform heat dissipation and efficient heat exchange are achieved, and the motor is operated stably.
Patent Information
- Application Number
- CN202422223774.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The heat dissipation performance of existing permanent magnet motors is poor, which leads to the permanent magnet being easily demagnetized under high temperature conditions, affecting the normal operation of the motor.
A heat dissipation sleeve is designed, which includes an inner rotating cavity and an outer water flow channel. The water flow channel extends along the axial direction of the heat dissipation sleeve, and enhances heat exchange efficiency through convex ribs and flow guide grooves. It is made of aluminum alloy to improve heat conduction efficiency.
It achieves uniform heat dissipation, improves heat exchange efficiency, ensures stable operation of the motor, and prevents permanent magnets from demagnetizing.
Smart Images
Figure CN223052849U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of motors, and particularly to a heat dissipation sleeve for a permanent magnet motor. Background Art
[0002] Permanent magnet motors have the advantages of simple structure, small volume, high efficiency, high power factor, etc., and are widely used in industries such as the metallurgical industry, ceramic industry, rubber industry, petroleum industry, and textile industry.
[0003] However, when a permanent magnet motor operates for a long time, it will release a large amount of heat. If the permanent magnets in the permanent magnet motor operate under high-temperature conditions for a long time, demagnetization will occur, affecting the normal operation of the motor. Therefore, improvements are made to the heat dissipation performance of the motor. Utility Model Content
[0004] The utility model discloses a heat dissipation sleeve for a permanent magnet motor, which solves the problem of poor heat dissipation performance of the existing permanent magnet motor.
[0005] A heat dissipation sleeve for a permanent magnet motor includes a heat dissipation sleeve body. The inner side of the heat dissipation sleeve body is provided with a rotating cavity for accommodating the motor rotor, and the outer side of the heat dissipation sleeve body is provided with a water flow channel for heat exchange, and the water flow channel extends along the axial direction of the heat dissipation sleeve body.
[0006] In this application, the outer side of the heat dissipation sleeve body is provided with a water flow channel for heat exchange, which can conduct heat exchange through the heat dissipation sleeve body and the rotating cavity inside it, so as to dissipate heat. Moreover, the water flow channel extends along the axial direction of the heat dissipation sleeve body, making the heat dissipation of the heat dissipation sleeve body uniform.
[0007] The following also provides several optional ways, but they are not additional limitations to the above overall solution. They are only further supplements or optimizations. On the premise of no technical or logical contradictions, each optional way can be combined with the above overall solution alone, or multiple optional ways can be combined with each other.
[0008] Optionally, convex ribs are provided on the outer periphery of the heat dissipation sleeve body, and the convex ribs are spirally distributed on the outer side of the heat dissipation sleeve body to form the water flow channel.
[0009] Optionally, the convex ribs include a first convex rib and a second convex rib, and the first convex rib and the second convex rib form a double helix structure on the outer periphery of the heat dissipation sleeve body.
[0010] Optionally, one end of the first convex rib on the outer side of the heat dissipation sleeve body forms a first helix, and the other end of the second convex rib on the outer side of the heat dissipation sleeve body forms a second helix, and the first helix and the second helix are arranged in the opposite direction.
[0011] Optionally, a diversion groove for heat exchange is also provided on the outer side of the heat dissipation sleeve body. The diversion groove is located in the water flow channel and extends synchronously with the water flow channel.
[0012] Optionally, the cross-section of the diversion groove is "U"-shaped or "V"-shaped.
[0013] Optionally, the cross-section of the diversion groove is "W"-shaped.
[0014] Optionally, flange structures are respectively provided at both ends of the heat dissipation sleeve body.
[0015] Optionally, a heat dissipation structure for increasing the contact area is provided on the side wall of the rib.
[0016] Optionally, the heat dissipation structure is one of protrusions and grooves.
[0017] The beneficial effects of this application are as follows:
[0018] 1. In this application, a water flow channel extending axially is provided outside the heat dissipation sleeve body, so that the heat dissipation of the heat dissipation sleeve body is uniform;
[0019] 2. In this application, a diversion groove is provided in the water flow channel, which can further increase the heat dissipation area and improve the heat exchange efficiency. Description of the Drawings
[0020] Figure 1 is a schematic structural diagram of an embodiment of this application;
[0021] Figure 2 is a sectional view of an embodiment of this application;
[0022] Figure 3 is a schematic structural diagram of an embodiment of this application;
[0023] Figure 4 is a partial enlarged view of an embodiment of this application;
[0024] Figure 5 is a partial enlarged view of an embodiment of this application;
[0025] Figure 6 is a partial enlarged view of an embodiment of this application.
[0026] The descriptions of the reference numerals in the drawings are as follows:
[0027] 1. Heat dissipation sleeve body; 11. Sealing groove; 2. Rotating cavity; 3. Water flow channel; 4. Rib; 41. First rib; 42. Second rib; 43. First helix; 44. Second helix; 5. Diversion groove; 6. Heat dissipation structure; 7. Sealing sleeve. Detailed Embodiments
[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0029] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0031] Reference Figure 1 In an embodiment of the present application, a heat dissipation sleeve for a permanent magnet motor is disclosed. The heat dissipation sleeve is sleeved outside the motor rotor and includes a heat dissipation sleeve body 1. The heat dissipation sleeve body 1 is provided with a rotation cavity 2 for accommodating the motor rotor. The heat dissipation sleeve body 1 has an inner wall and an outer wall opposite to each other. A water flow channel 3 is provided on the outer wall of the heat dissipation sleeve body 1. The water flow channel 3 is arranged circumferentially along the outer wall of the heat dissipation sleeve body 1 and extends axially along the outer wall of the heat dissipation sleeve body 1, and can fully cover the entire outer surface of the heat dissipation sleeve body 1, thereby fully absorbing heat.
[0032] It should be noted that referring to Figure 2 Outside the heat dissipation sleeve body 1, a housing 7 for sealing is provided to form a sealed environment for the coolant to flow.
[0033] In some embodiments, the permanent magnet can be disposed on one side close to its inner wall.
[0034] In other embodiments, it can also be disposed on one side close to its outer wall.
[0035] Reference Figure 1 And Figure 2 The above-mentioned water flow channel 3 is formed by ribs 4 on the outer wall of the heat dissipation sleeve body 1 at intervals.
[0036] Furthermore, the convex ribs 4 protrude from the outer wall of the heat dissipation sleeve body 1 and extend axially along the outer circumference of the heat dissipation sleeve body 1 in a spiral shape. The upper end of the convex rib 4 is connected to the housing 7, and the lower end is connected to the outer wall of the heat dissipation sleeve body 1. A water flow channel 3 is hermetically formed between adjacent convex ribs 4 in the axial direction.
[0037] In some embodiments, there are at least two convex ribs 4, which are respectively arranged on the outer wall of the heat dissipation sleeve body 1.
[0038] Furthermore, the convex rib 4 includes a first convex rib 41 and a second convex rib 42, and the first convex rib 41 and the second convex rib 42 form a double - helix structure on the outer wall of the heat dissipation sleeve body 1.
[0039] It should be noted that, under the double - helix structure, two independent water flow channels 3 can be formed on the surface of the heat dissipation sleeve body 1. On the one hand, the two independent water flow channels 3 can increase the water inflow and improve the heat exchange efficiency. On the other hand, when there is only one water flow channel 3, the coolant rotates spirally around the outer wall of the heat dissipation sleeve body 1 in the water flow channel 3, which will affect the stability of the heat dissipation sleeve body 1 and the permanent magnet motor. However, with two independent water flow channels 3, one water flow channel 3 can intake water in the forward direction, and the other water flow channel 3 can intake water in the reverse direction. Thus, the external force that affects the stability of the heat dissipation sleeve body 1 can be offset by the left - hand and right - hand water flows, ensuring the stable operation of the motor.
[0040] For example Figure 3 As shown in, on the basis that the convex rib 4 includes the first convex rib 41 and the second convex rib 42 in the above - mentioned embodiment, one end of the first convex rib 41 outside the heat dissipation sleeve body 1 forms a first helix 43, and the other end of the second convex rib 42 outside the heat dissipation sleeve body 1 forms a second helix 44. The first helix 43 and the second helix 44 are arranged in the opposite direction.
[0041] Therefore, a left - hand water flow channel and a right - hand water flow channel can be formed on the outer wall of the heat dissipation sleeve body 1. The left - hand water flow channel and the right - hand water flow channel can be interconnected. When the coolant flows through, it passes through two opposite water flow channels in sequence, and can also offset the external force caused by the rotation of the coolant in the water flow channel.
[0042] Refer to Figures 4 to 5 To further increase the heat dissipation area of the heat dissipation sleeve body 1 and improve the heat exchange efficiency, in some embodiments, a diversion groove 5 can be provided on the outer side of the heat dissipation sleeve body 1. The diversion groove 5 is recessed downward into the outer surface of the heat dissipation sleeve body 1, further increasing the contact area between the coolant and the heat dissipation sleeve body 1 on the basis of the technology of the convex rib 4.
[0043] In some embodiments, the diversion groove 5 is located in the water flow channel 3 and extends synchronously along the water flow channel 3.
[0044] Among them, there is at least one flow guide groove 5. In some embodiments, the cross-section of the flow guide groove 5 is V-shaped or can also be U-shaped; in other embodiments, there can be two flow guide grooves 5 with a W-shaped cross-section.
[0045] Furthermore, the flow guide groove 5 can also be provided on the side wall of the rib 4, as Figure 5 shown.
[0046] Furthermore, the side wall of the rib 4 is provided with a heat dissipation structure 6, which protrudes or depresses to further increase the contact area with the coolant.
[0047] Refer to Figure 6 , in some embodiments, both ends of the heat dissipation sleeve body 1 are provided with flange structures for connecting to the motor end cover.
[0048] Furthermore, on both ends of the heat dissipation sleeve body 1 on the side relative to the sealing sleeve 7, a sealing groove 11 is provided for accommodating a sealing rubber sleeve to seal the connection between the heat dissipation sleeve body 1 and the sealing sleeve 7.
[0049] To further improve the heat dissipation effect, the heat dissipation sleeve body 1 can be made of aluminum alloy material to improve the heat conduction efficiency.
[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. When the technical features in different embodiments are shown in the same drawing, it can be regarded that the drawing also discloses the combined examples of the respective embodiments involved.
[0051] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.
Claims
1. A heat dissipation sleeve for a permanent magnet motor, comprising a heat dissipation sleeve body (1), wherein the heat dissipation sleeve body (1) has a rotating cavity (2) inside for accommodating a motor rotor, characterized in that: The heat dissipation sleeve body (1) has a water flow channel (3) for heat exchange on the outside, and the water flow channel (3) extends along the axial direction of the heat dissipation sleeve body (1).
2. A heat dissipation sleeve for a permanent magnet motor according to claim 1, characterized in that: The outer periphery of the heat dissipation sleeve body (1) is provided with convex ribs, and the convex ribs are distributed in a spiral manner on the outer side of the heat dissipation sleeve body (1) to form the water flow channel (3).
3. A heat dissipation sleeve for a permanent magnet motor according to claim 2, characterized in that: The convex ribs comprise a first convex rib (41) and a second convex rib (42), wherein the first convex rib (41) and the second convex rib (42) form a double helical structure on the periphery of the heat dissipation sleeve body (1).
4. A heat dissipation sleeve for a permanent magnet motor according to claim 3, characterized in that: The first convex rib (41) forms a first spiral (43) at one end outside the heat dissipation sleeve body (1), and the second convex rib (42) forms a second spiral (44) at the other end outside the heat dissipation sleeve body (1), and the first spiral (43) and the second spiral (44) are arranged in opposite directions.
5. The heat dissipation sleeve of a permanent magnet motor according to claim 2, characterized in that: The heat dissipation sleeve body (1) is also provided with a guide groove (5) for heat exchange on the outside; the guide groove (5) is located in the water flow channel (3) and extends synchronously with the water flow channel (3).
6. The heat dissipation sleeve of a permanent magnet motor according to claim 5, characterized in that: The cross section of the guide groove (5) is "U"-shaped or "V"-shaped.
7. The heat dissipation sleeve of a permanent magnet motor according to claim 5, characterized in that: The cross section of the guide groove (5) is "W"-shaped.
8. The heat dissipation sleeve of a permanent magnet motor according to claim 1, characterized in that: Both ends of the heat dissipation sleeve body (1) are respectively provided with flange structures.
9. The heat dissipation sleeve of a permanent magnet motor according to claim 2, characterized in that: The side wall of the convex rib is provided with a heat dissipation structure (6) for increasing the contact area.
10. The heat dissipation sleeve of a permanent magnet motor according to claim 9, characterized in that: The heat dissipation structure (6) is one of a protrusion and a groove.