A self-cooling structure for a pitch DC motor

Abstract

This invention proposes a self-cooling structure for a pitch DC motor, including a cooling shroud, an end plate mounted on one end of the cooling shroud, two cooling rings embedded in the outer surface of the cooling shroud, and an annular threaded seat connected to the outer surface of the cooling shroud. A DC motor is mounted on one end of the end plate, and the inner rings of both cooling rings are in contact with the outer surface of the DC motor. This invention relates to the field of pitch DC motors. Through the contact between the cooling rings and the surface of the DC motor, the DC motor can conduct heat, which is then transferred to the cooling fins via a heat-conducting plate. The cooling fins are energized and absorb heat, achieving initial cooling of the DC motor. Compared to the traditional method relying solely on heat sinks, this adds an active cooling stage, effectively improving heat dissipation efficiency. Furthermore, the rotation of an energized cooling fan generates airflow, which enters the interior of the cooling shroud through ventilation micro-holes, promoting air convection around the DC motor and further assisting in heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of pitch DC motors, specifically a self-cooling structure for a pitch DC motor. Background Technology

[0002] A pitch DC motor is a type of DC motor used in the pitch system of a wind turbine generator set. The DC power supply supplies power to the armature winding through brushes. The conductors on the surface of the armature, under the N and S poles, carry currents in the same direction. According to the left-hand rule, these conductors will be subjected to torque, causing the entire armature winding, i.e., the rotor, to rotate in a certain direction, thereby converting the input DC electrical energy into mechanical energy output on the rotor shaft.

[0003] Pitch DC motors are commonly used in wind turbine generators, where the operating environment is harsh and involves high temperatures. In such environments, DC motors typically use heat sinks for cooling. However, as the temperature difference with the surrounding environment decreases, the cooling efficiency drops, making it difficult to meet the cooling requirements when the motor generates excessive heat loads. This can easily lead to high-temperature damage. To address this issue, we propose a self-cooling structure for pitch DC motors. Utility Model Content

[0004] The purpose of this invention is to provide a self-cooling structure for a pitch DC motor, so as to solve the problems mentioned in the background art and overcome its technical defects.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a self-cooling structure for a pitch DC motor, including a cooling cover with an end plate installed at one end of the cooling cover, two cooling rings embedded on the outer surface of the cooling cover, an annular threaded seat connected to the outer surface of the cooling cover, a DC motor installed at one end of the end plate, the inner rings of the two cooling rings contacting the outer surface of the DC motor, two heat-conducting plates connected to the outer surfaces of the two cooling rings, a cooling fin connected to one side of each of the two heat-conducting plates, and a heat sink provided on one side of the DC motor.

[0006] As a further embodiment of this utility model: the heat dissipation component includes an annular cover, the outer surface of one end of the annular cover is threadedly connected to the inner wall of the annular threaded seat, the inner wall of the annular threaded seat is connected to a buffer pad, and one side of the buffer pad is in contact with one end of the annular cover.

[0007] As a further improvement of this utility model: the inner ring of the annular cover is connected to two support plates, and the two support plates are connected to a cooling fan on their adjacent sides.

[0008] As a further embodiment of this utility model: the inner ring of the annular cover is threadedly connected to an annular threaded plate, and the inner ring of the annular threaded plate is connected to a ventilation mesh plate.

[0009] As a further improvement of this utility model: one side of the end plate and one side of the two cooling rings are provided with annularly arranged ventilation micro-holes, and each ventilation micro-hole is located on one side of the heat sink.

[0010] As a further improvement of this utility model: each of the two cooling chips has a set of heat dissipation fins connected to its opposite side, and the number of heat dissipation fins in a set is at least 6.

[0011] As a further improvement of this utility model: the bottom surface of the cooling cover is connected to two mounting supports, and the bottom surface of both mounting supports is provided with mounting holes.

[0012] As a further improvement of this utility model, the outer surface of the end plate is connected to two fasteners, and each of the two fasteners has a fixing hole on one side.

[0013] Compared with the prior art, the beneficial effects of this utility model include: the contact between the cooling ring and the surface of the DC motor enables the DC motor to conduct heat, which is then transferred to the cooling plate through the heat conduction plate. The cooling plate absorbs heat by being energized, achieving initial cooling of the DC motor. Compared with the traditional method that relies solely on heat sinks, this adds an active cooling step, effectively improving heat dissipation efficiency. In addition, the airflow generated by the energized cooling fan is introduced into the cooling cover through ventilation micro-holes, promoting air convection around the DC motor and further assisting in heat dissipation. This compensates for the reduced heat dissipation efficiency of traditional heat sinks due to the decrease in ambient temperature difference, and can meet the heat dissipation requirements of the DC motor when it generates excessive heat load, ensuring stable operation of the motor under various operating conditions and reducing the occurrence of high-temperature damage. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0015] Figure 1 The schematic diagram shows a frontal perspective perspective view of the self-cooling structure of a pitch DC motor according to one embodiment of the present invention.

[0016] Figure 2 The schematic diagram shows a front cross-sectional view of the self-cooling structure of a pitch DC motor according to one embodiment of the present invention.

[0017] Figure 3The schematic diagram shows a side cross-sectional view of the self-cooling structure of a pitch DC motor according to one embodiment of the present invention.

[0018] Figure 4 The schematic diagram shows a three-dimensional side view of the annular cover of the self-cooling structure of the pitch DC motor according to one embodiment of the present invention.

[0019] Figure 5 The schematic diagram illustrates a self-cooling structure for a pitch DC motor according to one embodiment of the present invention. Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0020] The following are the labels in the diagram: 1. Cooling cover; 2. End plate; 3. Cooling ring; 4. Fixing hole; 5. Annular threaded seat; 6. Heat sink; 601. Annular cover; 602. Support plate; 603. Cooling fan; 604. Annular threaded plate; 605. Ventilation mesh plate; 7. Buffer pad; 8. Heat conduction plate; 9. Cooling fin; 10. Heat dissipation fin; 11. Ventilation micro-hole; 12. DC motor; 13. Mounting bracket; 14. Mounting hole; 15. Fixing component. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0022] According to one embodiment of the present invention, in conjunction with the appendix Figure 1-5 As shown.

[0023] A self-cooling structure for a pitch DC motor includes a cooling shroud 1, an end plate 2 mounted on one end of the cooling shroud 1, and two cooling rings 3 embedded on the outer surface of the cooling shroud 1. The cooling rings 3 are made of pure copper, which can quickly conduct heat. When the cooling rings 3 come into contact with the DC motor 12, they quickly absorb and transfer the heat generated by the DC motor 12. An annular threaded seat 5 is connected to the outer surface of the cooling shroud 1. The DC motor 12 is mounted on one end of the end plate 2. The inner rings of both cooling rings 3 are in contact with the outer surface of the DC motor 12. The outer surfaces of the two cooling rings 3 are connected to two heat-conducting... The reason why the heat-conducting plate 8 and the cooling ring 3 are made of copper is similar. Due to its high thermal conductivity, it can efficiently transfer the heat from the cooling ring 3. Copper has good ductility and can be made into heat-conducting plates 8 of different thicknesses and shapes to adapt to various complex heat dissipation structure layouts. One side of each of the two heat-conducting plates 8 is connected to a cooling chip 9. The cooling chip 9 is a PN junction thermocouple made of semiconductor material. When a DC current is applied to the two ends of the thermocouple, the Peltier effect will occur, with one end absorbing heat and cooling, and the other end releasing heat. The model of the cooling chip 9 is TEC1-12710. A heat sink 6 is provided on one side of the DC motor 12.

[0024] In this embodiment, the heat sink 6 includes an annular cover 601. The outer surface of one end of the annular cover 601 is threadedly connected to the inner wall of the annular threaded seat 5. A buffer pad 7 is connected to the inner wall of the annular threaded seat 5. One side of the buffer pad 7 contacts one end of the annular cover 601. Two support plates 602 are connected to the inner ring of the annular cover 601. A cooling fan 603 is connected to the side of the two support plates 602 that are close to each other. An annular threaded plate 604 is threadedly connected to the inner ring of the annular cover 601. A ventilation mesh plate 605 is connected to the inner ring of the annular threaded plate 604. One side of the end plate 2 and one side of the two cooling rings 3 are connected to the end plate 2. The sides are provided with annularly arranged ventilation micro-holes 11, each ventilation micro-hole 11 is located on one side of the heat sink 6. The annular cover 601 is connected to the annular threaded seat 5 by thread, which allows the annular cover 601 to be installed quickly. The buffer pad 7 plays a role in buffering and sealing. When the heat sink 603 inside the annular cover 601 is powered and rotates, it allows external air to enter through the ventilation micro-holes 11, which in turn generates airflow, which will carry away the heat around the DC motor 12. At the same time, the ventilation mesh plate 605 can prevent foreign objects from entering, and the annular threaded plate 604 is set to fix the ventilation mesh plate 605.

[0025] In this embodiment, a set of heat dissipation fins 10 are connected to the two cooling chips 9 on their opposite sides, and the number of heat dissipation fins 10 is at least 6. By setting the heat dissipation fins 10, the heat dissipation speed of the hot surface of the cooling chip 9 can be increased, and the heat absorbed by the cooling chip 9 can be dissipated into the surrounding air. Two mounting supports 13 are connected to the bottom surface of the cooling cover 1, and mounting holes 14 are opened on the bottom surface of the two mounting supports 13. Two fasteners 15 are connected to the outer surface of the end plate 2, and fixing holes 4 are opened on one side of the two fasteners 15. The mounting supports 13 and mounting holes 14 can be used to install and fix the entire self-cooling structure in the corresponding position. The fasteners 15 and fixing holes 4 can be used to further stabilize the whole and ensure the stability of the position during operation and heat dissipation.

[0026] The working principle of this utility model is as follows: First, after the DC motor 12 generates heat during operation, the heat of the DC motor 12 can be conducted through the contact between the inner rings of the two cooling rings 3 and the surface of the DC motor 12. The heat-conducting plate 8 connected to the surface of the cooling ring 3 can transfer the heat to the cooling chip 9. Then, the cooling chip 9 is powered on, which enables its cold surface to cool and absorb heat, thereby initially cooling the DC motor 12.

[0027] Next, the cooling fan 603 is powered on and rotates, generating airflow. The airflow enters the cooling shroud 1 through the ventilation micro-holes 11, which can remove the heat around the DC motor 12. This will make the airflow flow more smoothly around the DC motor 12, enhance air convection, further assist in heat dissipation, and improve heat dissipation efficiency.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-cooling structure for a pitch DC motor, characterized in that, The device includes a cooling cover (1), an end plate (2) is installed at one end of the cooling cover (1), two cooling rings (3) are embedded on the outer surface of the cooling cover (1), an annular threaded seat (5) is connected to the outer surface of the cooling cover (1), a DC motor (12) is installed at one end of the end plate (2), the inner rings of the two cooling rings (3) are in contact with the outer surface of the DC motor (12), the outer surfaces of the two cooling rings (3) are connected to two heat-conducting plates (8), a cooling fin (9) is connected to one side of the two heat-conducting plates (8), and a heat sink (6) is provided on one side of the DC motor (12).

2. The self-cooling structure of the pitch DC motor according to claim 1, characterized in that, The heat sink (6) includes an annular cover (601), the outer surface of one end of the annular cover (601) is threaded to the inner wall of the annular threaded seat (5), and a buffer pad (7) is connected to the inner wall of the annular threaded seat (5), and one side of the buffer pad (7) is in contact with one end of the annular cover (601).

3. The self-cooling structure of the pitch DC motor according to claim 2, characterized in that, The inner ring of the annular cover (601) is connected to two support plates (602), and the two support plates (602) are connected to a cooling fan (603) on their adjacent sides.

4. The self-cooling structure of the pitch DC motor according to claim 2, characterized in that, The inner ring of the annular cover (601) is threadedly connected to an annular threaded plate (604), and the inner ring of the annular threaded plate (604) is connected to a ventilation mesh plate (605).

5. The self-cooling structure of the pitch DC motor according to claim 1, characterized in that, One side of the end plate (2) and one side of the two cooling rings (3) are provided with annularly arranged ventilation micro-holes (11), and each ventilation micro-hole (11) is located on one side of the heat sink (6).

6. The self-cooling structure of the pitch DC motor according to claim 1, characterized in that, Each of the two cooling chips (9) has a set of heat dissipation fins (10) connected to one side away from each other, and the number of heat dissipation fins (10) is at least 6.

7. The self-cooling structure of the pitch DC motor according to claim 1, characterized in that, The bottom surface of the cooling cover (1) is connected to two mounting supports (13), and the bottom surface of the two mounting supports (13) is provided with mounting holes (14).

8. The self-cooling structure of the pitch DC motor according to claim 1, characterized in that, The outer surface of the end plate (2) is connected to two fasteners (15), and each of the two fasteners (15) has a fixing hole (4) on one side.

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