Direct-current brushless rotor heat dissipation mechanism

Abstract

The utility model relates to a direct-current brushless rotor heat dissipation mechanism, which comprises a rotor body, a balance shaft is sleeved in the rotor body, a stator winding is sleeved on the periphery of the rotor body, a stator iron core is arranged outside the stator winding, heat dissipation fins are arranged outside the stator iron core, and the balance shaft is sleeved on the balance shaft. And a water-cooling heat dissipation structure is arranged in the balance shaft and the stator iron core. According to the direct-current brushless rotor heat dissipation mechanism, by arranging a water cooling heat dissipation structure 7, when the direct-current brushless rotor heat dissipation mechanism is used, cooling cold water is introduced into a first spiral conveying pipe 703 and a second spiral conveying pipe 704 by opening a blocking head 701, the first spiral conveying pipe 703 is arranged in a positioning iron core 5, heat generated by high-speed rotation of a rotor body 1 can be adsorbed, and the heat dissipation efficiency is improved; and the two ends of the first spiral conveying pipe 703 are used for inputting and outputting cold water respectively, and the subsequent water can be circulated, so that the heat generated by the operation of the rotor body 1 can be better dissipated.

Description

Technical Field

[0001] This utility model relates to the field of DC brushless rotor technology, specifically a DC brushless rotor heat dissipation mechanism. Background Technology

[0002] Because the rotor of a brushless DC motor is enclosed inside the stator, heat dissipation is difficult. Traditional methods rely on heat dissipation through the outer casing or indirect heat conduction within the stator, which is inefficient. Especially in high-speed and high-power scenarios, the rotor permanent magnets are prone to demagnetization due to high temperatures, leading to a decline in performance.

[0003] According to the utility model patent with Chinese patent application number 202321676363.8, a high-strength external rotor brushless DC motor is affected by external impacts during use, which can affect the normal operation and strength of the motor. However, this high-strength external rotor brushless DC motor does not have an efficient heat dissipation function for the rotor, which can significantly affect the service life of the rotor under long-term high-speed rotation. Therefore, it is necessary to propose a DC brushless rotor heat dissipation mechanism to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a DC brushless rotor heat dissipation mechanism, which has the advantages of efficient heat dissipation of the rotor, thus solving the problem that the prior art does not have the function of efficient heat dissipation of the rotor.

[0005] To achieve the above-mentioned goal of efficient heat dissipation for the rotor, this utility model provides the following technical solution: a DC brushless rotor heat dissipation mechanism, including a rotor body, a balance shaft sleeved inside the rotor body, a stator winding sleeved around the rotor body, a stator core disposed outside the stator winding, heat sinks disposed outside the stator core, a water-cooling heat dissipation structure disposed inside the balance shaft and the stator core, a cooling fan movably installed on the rear door of the rotor body, and a ventilation opening on the outside of the stator core;

[0006] The water-cooled heat dissipation structure includes a spiral groove. A spiral groove is formed on the inner wall of the balance shaft. A first spiral conveying pipe is arranged inside the spiral groove. A second spiral conveying pipe is connected to the end of the first spiral conveying pipe. A plug is inserted into the starting end of the first spiral conveying pipe.

[0007] Furthermore, a bearing is provided on the outside of the balance shaft, the balance shaft has a hollow structure, and the first spiral conveying pipe is disposed inside the balance shaft.

[0008] Furthermore, four sets of permanent magnets are provided on one side of the rotor body, and thermally conductive silicone grease is provided between the four sets of permanent magnets.

[0009] Furthermore, the stator core is coated with a ceramic layer.

[0010] Furthermore, the diameter of the vent is 1 / 10 to 1 / 15 of the rotor body.

[0011] Furthermore, the height of the heat sink is 1 / 20 to 1 / 30 of the outer diameter of the rotor body 1, and the spacing between the heat sinks is 1.5 to 3 times the height.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] This DC brushless rotor cooling mechanism, through the water-cooling structure 7, allows for the introduction of cooling water into the first spiral conveying pipe 703 and the second spiral conveying pipe 704 by opening the blocking head 701 during use. The first spiral conveying pipe 703 is located inside the positioning iron core 5 and can absorb the heat generated by the high-speed rotation of the rotor body 1. Furthermore, the two ends of the first spiral conveying pipe 703 are the input and output of cooling water, respectively, which can circulate the water and thus better dissipate the heat generated by the operation of the rotor body 1.

[0014] This DC brushless rotor cooling mechanism features heat sinks 6 and through holes 8, with internal axial ventilation ports 8 evenly distributed around the circumference of the rotor body 1 to form an airflow channel. When the rotor body 1 rotates, it pushes the airflow through the ventilation ports 8 to dissipate the heat generated by the high-speed rotation of the stator windings 4 and the rotor body 1. Simultaneously, a ceramic coating 9 is provided to enhance heat radiation cooling of the stator core 5. A cooling fan 12 is provided on one side of the rotor body 1 to drive external airflow into the interior of the balance wheel 2 for cooling. Attached Figure Description

[0015] Figure 1 This is a perspective view of the rotor structure of this utility model;

[0016] Figure 2 This is a front sectional view of the rotor structure of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0018] Figure 4 This is a rear view of the rotor structure of this utility model.

[0019] In the diagram: 1. Rotor body; 2. Balance shaft; 3. Bearing; 4. Stator winding; 5. Stator core; 6. Heat sink; 7. Water-cooled heat dissipation structure; 701. Blocking head; 702. Spiral groove; 703. First spiral conveying pipe; 704. Second spiral conveying pipe; 8. Vent; 9. Coating; 10. Permanent magnet; 11. Thermal grease; 12. Cooling fan. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-4 A DC brushless rotor heat dissipation mechanism in this embodiment includes a rotor body 1, a balance shaft 2 sleeved inside the rotor body 1, a stator winding 4 sleeved around the rotor body 1, a stator core 5 disposed outside the stator winding 4, a heat sink 6 disposed outside the stator core 5, a water cooling structure 7 disposed inside the balance shaft 2 and the stator core 5, a cooling fan 12 movably installed on the rear side door of the rotor body 1, and a ventilation opening 8 opened on the outside of the stator core 5.

[0022] The water-cooled heat dissipation structure 7 includes a spiral groove 702. The spiral groove 702 is provided on the inner wall of the balance shaft 2. A first spiral conveying pipe 703 is provided inside the spiral groove 702. A second spiral conveying pipe 704 is connected to the end of the first spiral conveying pipe 703. A plug head 701 is inserted into the starting end of the first spiral conveying pipe 703.

[0023] In the implementation of the case, by setting up a water-cooled heat dissipation structure 7, when in use, by opening the blocking head 701, cooling water is introduced into the interior of the first spiral conveying pipe 703 and the second spiral conveying pipe 704. The first spiral conveying pipe 703 is set inside the positioning iron core 5, which can absorb the heat generated by the high-speed rotation of the rotor body 1. The two ends of the first spiral conveying pipe 703 are the input and output of cooling water, which can circulate the water and make the heat generated by the operation of the rotor body 1 better dissipated.

[0024] In the implementation of the case, by setting heat sink 6 and through hole 8, and providing axial ventilation 8 inside, the ventilation 8 is evenly distributed along the circumference of rotor body 1 to form an airflow channel. When rotor body 1 rotates, it will push the airflow at the ventilation 8 to dissipate the heat generated by the high-speed rotation of stator winding 4 and rotor body 1. At the same time, by setting coating 9, which is a ceramic coating, the heat radiation heat dissipation of stator core 5 can be enhanced. A cooling fan 12 is set on one side of rotor body 1, which can drive the external airflow into the interior of the balance walkway 2 for heat dissipation.

[0025] In the implementation of the case, by providing thermal grease 11 at the connection between permanent magnets 10, the permanent magnets 10 can be quickly cooled; by providing thermal adhesive in the inner groove where the permanent magnets 10 are installed, and by covering the outside of the permanent magnets 10 with a copper foil layer, the heat is conducted to the stator core 5 through the copper foil for further heat dissipation.

[0026] When implementing this procedure, please follow these steps:

[0027] 1) First, the rotor body 1 is driven to rotate by the action of the permanent magnet 10, the stator core 5 and the heat sink 6;

[0028] 2) Then, the rotation of the rotor body 1 will drive the hot air out of the vent 8;

[0029] 3) The heat generated by the rotation of the rotor body 1 is then absorbed by the water-cooled heat dissipation structure 7;

[0030] 4) Finally, the heat is further absorbed by the heat sink 6.

[0031] In summary, this DC brushless rotor cooling mechanism, by setting up a water-cooling structure 7, allows for the introduction of cooling water into the first spiral conveying pipe 703 and the second spiral conveying pipe 704 by opening the blocking head 701 during use. The first spiral conveying pipe 703 is located inside the positioning iron core 5 and can absorb the heat generated by the high-speed rotation of the rotor body 1. Furthermore, the two ends of the first spiral conveying pipe 703 are the input and output of cooling water, respectively, which can circulate the water and thus better dissipate the heat generated by the operation of the rotor body 1.

[0032] Furthermore, by setting heat sink 6 and through hole 8, an axial ventilation port 8 is provided inside. The ventilation port 8 is evenly distributed along the circumference of the rotor body 1 to form an airflow channel. When the rotor body 1 rotates, it will push the airflow at the ventilation port 8 to dissipate the heat generated by the high-speed rotation of the stator winding 4 and the rotor body 1. At the same time, by setting a coating 9, which is a ceramic coating, the heat radiation heat dissipation of the stator core 5 can be enhanced. A cooling fan 12 is set on one side of the rotor body 1, which can drive the external airflow into the interior of the balance walkway 2 for heat dissipation.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A direct current brushless rotor heat dissipation mechanism comprising a rotor body (1), characterized in that: The rotor body (1) is fitted with a balance shaft (2) inside, and a stator winding (4) is fitted around the rotor body (1). A stator core (5) is provided outside the stator winding (4). A heat sink (6) is provided outside the stator core (5). A water-cooled heat dissipation structure (7) is provided inside the balance shaft (2) and the stator core (5). A cooling fan (12) is movably installed on the rear door of the rotor body (1). A ventilation opening (8) is provided outside the stator core (5). The water-cooled heat dissipation structure (7) includes a spiral groove (702). The inner wall of the balance shaft (2) is provided with a spiral groove (702). A first spiral conveying pipe (703) is provided inside the spiral groove (702). A second spiral conveying pipe (704) is connected to the end of the first spiral conveying pipe (703). A plug head (701) is inserted into the starting end of the first spiral conveying pipe (703).

2. A heat dissipation mechanism for a brushless DC motor rotor as claimed in claim 1, wherein: The balance shaft (2) is provided with a bearing (3) on its outside. The balance shaft (2) has a hollow structure, and the first spiral conveying pipe (703) is provided inside the balance shaft (2).

3. The direct current brushless rotor heat dissipation mechanism of claim 1, wherein: Four sets of permanent magnets (10) are provided on one side of the rotor body (1), and thermal grease (11) is provided between the four sets of permanent magnets (10).

4. The direct current brushless rotor heat dissipation mechanism of claim 1, wherein: The stator core (5) is coated with a coating (9), which is a ceramic layer.

5. A heat sink for a brushless DC motor rotor as claimed in claim 1, wherein: The diameter of the vent (8) is 1 / 10 to 1 / 15 of the rotor body (1).

6. A heat sink for a brushless DC motor rotor as claimed in claim 1, wherein: The height of the heat sink (6) is 1 / 20-1 / 30 of the outer diameter of the rotor body (1), and the spacing of the heat sink (6) is 1.5-3 times the height.

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