Airflow disturbance cooling device for high-voltage electric machine

Abstract

The utility model discloses a high -voltage motor airflow disturbance cooling device, including with the heat exchange chamber of machine base internal air cooling circulation intercommunication and the cooling pipe of being built -in in the heat exchange chamber through the support board, be equipped with at least one baffle in the heat exchange chamber, and the baffle is interval and height is staggered with the support board in the airflow flow direction and is arranged, make the channel that airflow forms between the support board and baffle be broken line shape and flow through the cooling pipe, cooling pipe can rotate, and its outside is equipped with fin group, cooling pipe penetrates the baffle, and is cooperated and is connected with the baffle screw thread, when cooling pipe rotates, drive the fin group on it follow -up rotation, and through screw thread connection drive baffle reciprocating movement along the axial direction of cooling pipe to disturb airflow, the utility model discloses through the rotation cooling pipe synchronous drive fin rotation and drive baffle reciprocating movement disturbance airflow, solve high -voltage motor heat exchange efficiency low problem.

Description

Technical Field

[0001] This utility model belongs to the field of high-voltage motor cooling technology, and in particular relates to a high-voltage motor airflow disturbance cooling device. Background Technology

[0002] Traditional air-cooled systems for high-voltage motors use fixed heat exchange tubes, which easily form a stable thermal boundary layer, hindering heat transfer. Furthermore, the monotonous airflow organization results in uneven airflow distribution areas, leading to uneven heat exchange. In particular, high-power motors experience insufficient heat dissipation in areas of concentrated temperature rise, forcing a reduction in load or an increase in airflow, resulting in increased energy consumption and noise. While existing baffle structures can extend the airflow path, they cannot actively disrupt the thermal boundary layer. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a high-voltage motor airflow disturbance cooling device, which drives the fins to rotate and the partition to move back and forth to disturb the airflow by rotating the cooling pipe synchronously. This solves the problem of low heat exchange efficiency of high-voltage motors.

[0004] Technical solution: To achieve the above objectives, the present invention provides a high-voltage motor airflow disturbance cooling device, comprising a heat exchange chamber connected to the internal air-cooling circulation of the motor base and a cooling pipe built into the heat exchange chamber via a support plate.

[0005] The heat exchange chamber is provided with at least one partition plate. The partition plate and the support plate are spaced apart and staggered in height in the direction of airflow, so that the airflow forms a zigzag channel between the support plate and the partition plate and flows through the cooling pipe.

[0006] The cooling pipe is rotatable and has fins on its exterior; the cooling pipe passes through the partition and is threadedly connected to the partition; when the cooling pipe rotates, it drives the fins on it to rotate accordingly, and drives the partition to reciprocate along the cooling pipe axis through the threaded connection to disturb the airflow.

[0007] Furthermore, the bottom end of the support plate is fixedly connected to the bottom of the heat exchange chamber, and the top end forms an upper channel with the top of the heat exchange chamber;

[0008] The top of the partition plate is fitted with the top of the heat exchange chamber through a micro-gap or sliding contact, and the bottom end forms a lower channel with the bottom of the heat exchange chamber.

[0009] Furthermore, the heat exchange chamber is provided with an inner air inlet and an inner air outlet on the mating surface where it is installed with the base. The heat exchange chamber enters through the inner air inlet and exits through the inner air outlet to form an air-cooled circulation loop with the inside of the base.

[0010] Furthermore, the partition plate is provided with flow-through holes; when the partition plate reciprocates axially under the drive of the cooling pipe, the airflow on both sides of the partition plate flows through the flow-through holes.

[0011] Furthermore, the total flow area of ​​all the flow holes on the same partition is less than the flow cross-sectional area of ​​the lower channel corresponding to the bottom end of the partition.

[0012] Furthermore, the air inlet and outlet ends of the cooling pipe extend to the outside of the heat exchange chamber and are rotatably connected to the corresponding side wall shaft seals of the heat exchange chamber; a rotation drive mechanism is provided for the corresponding cooling pipe to drive the cooling pipe to rotate.

[0013] Furthermore, an air distribution chamber is provided corresponding to the air inlet end of the cooling pipe, with an external air inlet at the bottom and an air distribution channel inside; the external cooling air entering the air distribution chamber through the external air inlet is guided to the air inlet end of each cooling pipe through the air distribution channel.

[0014] Furthermore, the airflow direction within the heat exchange chamber is opposite to the cooling airflow direction within the cooling pipe.

[0015] Furthermore, the fin assembly includes helical fins, straight fins, or a combination of both.

[0016] Beneficial effects: This invention achieves dual active disturbance through synchronous rotation of the cooling pipe: the rotating fins continuously peel away the thermal boundary layer, forcibly renewing the heat exchange interface and significantly improving the heat transfer efficiency of the pipe wall; simultaneously, the threaded drive drives the baffle to move axially and reciprocate, periodically changing the cross-sectional area of ​​the flow channel, generating large-scale turbulence, and eliminating the uneven airflow distribution phenomenon in traditional static heat exchange. This achieves improved heat exchange efficiency under the same airflow volume. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a high-voltage motor airflow disturbance cooling device includes a heat exchange chamber 2 connected to the air-cooled circulation inside the motor base 1 and a cooling pipe 4 built into the heat exchange chamber 2 via a support plate 3. The heat exchange chamber 2 is provided with at least one partition plate 5. The partition plate 5 and the support plate 3 are spaced apart and staggered in height in the airflow direction, so that the airflow forms a zigzag channel between the support plate 3 and the partition plate 5 and flows through the cooling pipe 4, thereby forcing the airflow to change direction multiple times and flow in a zigzag pattern, extending the contact path between the airflow and the cooling pipe 4, extending the heat exchange time, and ensuring that the airflow evenly covers all areas of the cooling pipe 4, eliminating the phenomenon of uneven airflow distribution.

[0020] The cooling pipe 4 is rotatable and has fins on its exterior. The cooling pipe 4 passes through a partition 5 and is threadedly connected to the partition 5. When the cooling pipe 4 rotates, it drives the fins on it to rotate accordingly, and the threaded connection drives the partition 5 to reciprocate along the axial direction of the cooling pipe 4, thus disturbing the airflow. The rotating fins break the static thermal boundary layer on the surface of the cooling pipe 4, dynamically renewing the airflow contact surface, forcibly disturbing the high-temperature airflow around the pipe, reducing thermal resistance, and preventing localized high-temperature accumulation. Furthermore, the axial movement of the partition 5 periodically changes the cross-sectional area of ​​the flow channel, generating localized velocity abrupt changes and enhancing the intensity of airflow turbulence. Therefore, through the dual effects of fin rotation and partition movement, the traditional static heat transfer limit is broken.

[0021] The bottom end of the support plate 3 is fixedly connected to the bottom of the heat exchange chamber 2, and the top end forms an upper channel 6 with the top of the heat exchange chamber 2; the top end of the partition plate 5 is in a micro-gap fit or sliding contact fit with the top of the heat exchange chamber 2, and the bottom end forms a lower channel 7 with the bottom of the heat exchange chamber 2.

[0022] The support plate 3 is provided with through holes 31 that correspond one-to-one with the cooling pipes 4, and the cooling pipes 4 pass through the corresponding through holes 31.

[0023] The cooling pipe 4 has an external threaded part 41 on its surface, and the partition plate 5 has a corresponding threaded hole 51. The external threaded part 41 and the threaded hole 51 are engaged.

[0024] The heat exchange chamber 2 has an inner air inlet 2a and an inner air outlet 2b on the mating surface with the base. The heat exchange chamber 2 enters through the inner air inlet 2a and exits through the inner air outlet 2b to form an air-cooled circulation loop with the inside of the base 1.

[0025] The partition 5 is provided with flow-through holes 52; when the partition 5 reciprocates axially under the drive of the cooling pipe 4, the airflow on both sides of the partition 5 flows through the flow-through holes 52. The threaded pair converts the rotational motion into linear motion, the displacement of the partition 5 disturbs the airflow, changes the cross-sectional area of ​​the flow channel, enhances the turbulence intensity of the airflow, and the flow-through holes 52 help to balance the pressure difference.

[0026] The total flow area of ​​all the cross-flow holes 52 on the same baffle 5 is smaller than the cross-sectional area of ​​the lower channel 7 corresponding to the bottom end of the baffle 5, ensuring that most of the airflow is still forced to flow through the designed zigzag main channel, thereby maintaining the core function of extended flow. When the baffle 5 moves back and forth, a pressure difference is easily generated on both sides. The cross-flow holes 52 provide a limited bypass path, allowing a small amount of airflow to pass through the baffle 5, avoiding drastic pressure fluctuations that could cause the baffle 5 to jam or vibrate, thus ensuring the stability of movement. The small amount of airflow passing through forms cross-flow turbulence with the main channel airflow, further breaking the laminar boundary layer, but because the hole area is limited, it does not weaken the main channel flow, achieving micro-disturbance gain.

[0027] The air inlet and outlet ends of the cooling pipe 4 extend to the outside of the heat exchange chamber 2 and are rotatably connected to the corresponding side wall shaft seals of the heat exchange chamber 2. A rotation drive mechanism 8 is provided for the corresponding cooling pipe 4 to drive the cooling pipe 4 to rotate. The rotation drive mechanism 8 can be a servo motor driven gear chain transmission mechanism or a belt drive mechanism.

[0028] An air distribution chamber 9 is provided at the air inlet end of the cooling pipe 4, with an external air inlet 91 at the bottom and an air distribution channel 92 inside; the external cooling air entering the air distribution chamber 9 through the external air inlet 91 is guided to the air inlet end of each cooling pipe 4 through the air distribution channel 92.

[0029] The airflow direction in the heat exchange chamber 2 is opposite to the cooling airflow direction in the cooling pipe 4. The high-temperature airflow in the heat exchange chamber 2 and the low-temperature cooling airflow in the cooling pipe 4 flow in opposite directions, so that the pipe wall maintains a high average temperature difference throughout, which significantly improves the heat transfer efficiency.

[0030] In this invention, the fin assembly includes spiral fins 41 or straight fins 42 or a combination of both.

[0031] This invention achieves dual active disturbance through synchronous rotation of the cooling pipe: the rotating fins continuously peel away the thermal boundary layer, forcibly renewing the heat exchange interface and significantly improving the heat transfer efficiency of the pipe wall; simultaneously, the threaded drive drives the baffle to move axially back and forth, periodically changing the cross-sectional area of ​​the flow channel, generating large-scale turbulence, and eliminating the uneven airflow distribution phenomenon in traditional static heat exchange. This achieves improved heat exchange efficiency under the same airflow. Furthermore, the micro-gap design of the baffle compensates for thermal deformation, and the flow-through holes balance the pressure difference to avoid jamming, ensuring long-term stable operation of the system.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-voltage motor airflow disturbance cooling device, comprising a heat exchange chamber (2) connected to the air-cooled circulation inside the motor base (1) and a cooling pipe (4) built into the heat exchange chamber (2) via a support plate (3). Its features are: The heat exchange chamber (2) is provided with at least one partition (5). The partition (5) and the support plate (3) are spaced apart and staggered in height in the direction of airflow, so that the airflow forms a zigzag channel between the support plate (3) and the partition (5) and flows through the cooling pipe (4). The cooling pipe (4) is rotatable and has fins on its exterior; the cooling pipe (4) passes through the partition (5) and is threadedly connected to the partition (5); when the cooling pipe (4) rotates, it drives the fins on it to rotate accordingly, and drives the partition (5) to move back and forth along the cooling pipe (4) axially through the threaded connection to disturb the airflow.

2. The high-voltage motor airflow disturbance cooling device according to claim 1, characterized in that: The bottom end of the support plate (3) is fixedly connected to the bottom of the heat exchange chamber (2), and the top end forms an upper channel (6) with the top of the heat exchange chamber (2). The top of the partition (5) is in close contact with the top of the heat exchange chamber (2) through a small gap or by sliding contact, and the bottom of the partition (5) forms a lower channel (7) with the bottom of the heat exchange chamber (2).

3. A high-voltage motor airflow disturbance cooling device according to claim 1 or 2, characterized in that: The heat exchange chamber (2) has an inner air inlet (2a) and an inner air outlet (2b) on the mating surface with the base. The heat exchange chamber (2) enters through the inner air inlet (2a) and exits through the inner air outlet (2b) to form a wind-cooled circulation loop with the inside of the base (1).

4. The high-voltage motor airflow disturbance cooling device according to claim 2, characterized in that: The partition (5) is provided with a flow-through hole (52); when the partition (5) moves back and forth axially under the drive of the cooling pipe (4), the airflow on both sides of the partition (5) flows through the flow-through hole (52).

5. The high-voltage motor airflow disturbance cooling device according to claim 4, characterized in that: The total flow area of ​​all the flow holes (52) on the same partition (5) is less than the flow cross-sectional area of ​​the lower channel (7) corresponding to the bottom end of the partition (5).

6. The high-voltage motor airflow disturbance cooling device according to claim 1, characterized in that: The air inlet and outlet of the cooling pipe (4) extend to the outside of the heat exchange chamber (2) and are rotatably connected to the corresponding side wall shaft seal of the heat exchange chamber (2); a rotation drive mechanism (8) is provided for the corresponding cooling pipe (4) to drive the cooling pipe (4) to rotate.

7. The high-voltage motor airflow disturbance cooling device according to claim 6, characterized in that: A distribution chamber (9) is provided at the air inlet end of the cooling pipe (4), with an external air inlet (91) at the bottom and an air distribution channel (92) inside; the external cooling air entering the distribution chamber (9) through the external air inlet (91) is guided to the air inlet end of each cooling pipe (4) through the air distribution channel (92).

8. A high-voltage motor airflow disturbance cooling device according to claim 1, 6, or 7, characterized in that: The airflow direction in the heat exchange chamber (2) is opposite to the cooling airflow direction in the cooling pipe (4).

9. A high-voltage motor airflow disturbance cooling device according to claim 1, characterized in that: The fin assembly includes spiral fins (41) or straight fins (42) or a combination of both.

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