Permanent magnet direct drive drum motor with heat dissipation function

Abstract

The application relates to a permanent magnet direct drive drum motor with a heat dissipation function and relates to the technical field of electric transmission systems. The permanent magnet direct drive drum motor comprises a main shaft, a stator and a mounting seat, the main shaft is arranged on the mounting seat, the stator is fixedly sleeved on the main shaft, a cooling water channel is arranged in a cavity formed by the main shaft and the stator, the cooling water channel is arranged on the outer side wall of the main shaft, one end of the cooling water channel is communicatively connected with a water inlet pipeline, the other end of the cooling water channel is communicatively connected with a water outlet pipeline, a blowpipe pipeline is communicatively connected with the side wall of the one end of the cooling water channel close to the water inlet pipeline, and a blowpipe is arranged in the blowpipe. After the permanent magnet direct drive drum motor in the application is cooled, less condensate water remains in the condensate water channel, so that new condensate water can be injected again during the next use, and the heat dissipation effect of the permanent magnet direct drive drum motor is improved.

Description

Technical Field

[0001] This application relates to the field of electric drive systems, and in particular to a permanent magnet direct drive drum motor with heat dissipation function. Background Technology

[0002] The permanent magnet direct drive roller mechanism is simple, reliable in operation, and suitable for high torque scenarios. It is widely used in mining and belt conveyor. However, during the operation of the external roller rotor, the coils on the internal stator will generate heat. Long-term heat accumulation will cause the permanent magnets fixed inside the roller rotor to demagnetize.

[0003] A Chinese patent with publication number CN114583890A discloses a permanent magnet direct-drive drum motor with heat dissipation and braking functions. It includes a main shaft, a stator, a mounting base, and a rotor. The main shaft is fixed to the mounting base, the stator is fixed to the main shaft, and the rotor is sleeved on the outside of the stator. Braking devices are fixed at both ends of the rotor. The cooling system includes a water-cooling device and an air-cooling device. The water-cooling device is located in the cavity between the stator and the main shaft and is wound around the main shaft. The air-cooling device is installed at one end of the main shaft and is parallel to the main shaft axis. When the permanent magnet direct-drive drum motor is working, condensate is injected into the water-cooling device, and air is blown towards the main shaft and the water-cooling device by the air-cooling device, thereby achieving rapid cooling of the inside of the main shaft.

[0004] Regarding the aforementioned technologies, the inventors believe that during use, since the water cooling device has only one inlet and one outlet, when condensate needs to be injected into the water cooling device, some condensate will always remain inside the water cooling device. This condensate will be affected by room temperature and its temperature will rise when the permanent magnet direct drive drum motor is not in use. When the permanent magnet direct drive drum motor is used again, the condensate temperature will rise and its condensation effect will be weakened, so it needs to be improved. Summary of the Invention

[0005] To address the issue that in related technologies, when a permanent magnet direct drive drum motor is used up, a significant amount of condensate remains inside the water-cooling device, leading to reduced condensation efficiency during the next use and consequently poor heat dissipation, this application provides a permanent magnet direct drive drum motor with heat dissipation functionality.

[0006] The permanent magnet direct-drive drum motor with heat dissipation function provided in this application adopts the following technical solution:

[0007] A permanent magnet direct-drive drum motor with heat dissipation function includes a main shaft, a stator, and a mounting base. The main shaft is mounted on the mounting base, and the stator is fixedly sleeved on the main shaft. A cooling water passage is provided in the cavity formed by the main shaft and the stator. The cooling water passage is wound around the outer side wall of the main shaft. One end of the cooling water passage is connected to an inlet pipe, and the other end is connected to an outlet pipe. A blower pipe is connected to the side wall of the cooling water passage near the inlet pipe, and a blower pump is provided in the blower port.

[0008] By adopting the above technical solution, when the permanent magnet direct drive drum motor of this application is in use and the spindle needs to be cooled after work, condensate is injected into the cooling water circuit through the water inlet pipe to complete the cooling of the permanent magnet direct drive drum motor spindle. After cooling is completed, the blower pump can be turned on to blow air into the condensate water circuit, so that the condensate in the condensate water circuit is discharged from the water storage pipe under pressure. Compared with the permanent magnet direct drive drum motor in related technologies, the permanent magnet direct drive drum motor of this application has less condensate in the condensate water circuit after cooling, so new condensate can be injected again when it is used next time, thus improving the heat dissipation effect of the permanent magnet direct drive drum motor.

[0009] Optionally, a baffle plate is provided on the inner wall of the cooling water passage near the water inlet pipe, and the baffle plate is inclined toward the water inlet pipe.

[0010] By adopting the above technical solution, the baffle plate can block some of the gas when the blower pump is blowing, thereby reducing the possibility of gas escaping from the water inlet pipe, improving the blowing effect of the blower pump, and thus improving the efficiency of the blower pump when blowing the condensate circuit.

[0011] Optionally, the baffle plate is hinged to the inner wall of the cooling water passage. An arc-shaped groove is provided on the side wall of the baffle plate near the water inlet pipe. A ball head is inserted into the arc-shaped groove and is adapted to fit the arc-shaped groove. A control rod is provided on the side wall of the ball head. A control hole is provided through the side wall of the water inlet pipe, and the control rod is threaded into the control hole.

[0012] By adopting the above technical solution, and using a control lever and its mechanism, the operator can rotate the control lever. At this time, the ball head rotates within the arc-shaped groove. Because the control lever is threadedly connected to the control hole, it can move vertically when rotated, and the ball head slides within the arc-shaped groove. Since the baffle plate is hinged to the inner wall of the water inlet pipe, it is controlled to rotate towards the water inlet pipe, resulting in smoother and more efficient airflow from the blower pump. Similarly, when the baffle plate is rotated away from the water inlet pipe by the control lever, water intake is smoother, improving the convenience of condensate filling.

[0013] Optionally, the cross-sectional area of ​​the wind deflector is larger than the cross-sectional area of ​​the water inlet pipe.

[0014] By adopting the above technical solution, when the cross-sectional area of ​​the wind deflector is larger than the cross-sectional area of ​​the water inlet pipe, the wind deflector can block the water inlet pipe, thereby further reducing the possibility of gas escaping from the water inlet pipe.

[0015] Optionally, a sealing ring is threaded onto one end of the control rod located outside the water inlet pipe. The sealing ring is fitted against the outer wall of the water inlet pipe, and a sealing ring is fitted onto the outer wall of the sealing ring.

[0016] By adopting the above technical solution, by fitting a sealing ring on the side wall of the control pipe and a sealing ring on the outer side wall of the sealing ring, when the operator controls the baffle plate by rotating the control rod, after the baffle plate is rotated to the appropriate position, the sealing ring can be rotated to make the sealing ring fit against the inner side wall of the water inlet pipe. This reduces the possibility of gas escaping from the gap between the control rod and the control hole when the blower pump is blowing air, and further improves the efficiency of the blower pump during blowing.

[0017] Optionally, a recycling bin can be detachably connected to the outer wall of the water outlet pipe.

[0018] By adopting the above technical solution, the structure of the recovery box allows it to collect the condensate after the blower pump finishes blowing air and discharges the condensate from the cooling water circuit. This enables the condensate to be recycled and reused, reducing operating costs.

[0019] Optionally, an air pump is installed on the side wall of the recycling bin, and the recycling bin is sealed to the water outlet pipe.

[0020] By adopting the above technical solution and using the structure of the air pump, when it is necessary to discharge condensate from the cooling water circuit, the air pump blows air from the inlet pipe and the air pump draws air from the outlet pipe, so that the condensate in the cooling water circuit is discharged from the outlet pipe into the collection box under atmospheric pressure, thereby further improving the efficiency of condensate discharge from the cooling water circuit.

[0021] Optionally, a liquid level detection device is provided on the side wall of the recycling bin, and a recycling hole is opened on the side wall of the recycling bin. A recycling pipe is installed in the recycling hole and is connected to the recycling bin. A sealing plate is provided at the end of the recycling pipe near the recycling bin for sealing the recycling pipe. The length of the sealing plate from the opposite side wall of the recycling bin and the water outlet pipe is less than the length of the liquid level sensor from the opposite side wall of the recycling bin and the water outlet pipe. An opening and closing structure for controlling the sealing plate is provided on the side wall of the recycling bin.

[0022] By adopting the above technical solution, the structure of the recovery pipe allows excess condensate in the recovery tank to be discharged into the next container, reducing the possibility of condensate backflow due to excessive condensate in the recovery tank and improving the efficiency of cleaning the cooling water circuit.

[0023] Optionally, the opening and closing structure includes an opening and closing electromagnet and a connecting magnet. A sliding groove is provided on the inner side wall of the recovery hole. A connecting rod is provided on the side wall of the cover plate near the sliding groove. The connecting rod is slidably inserted into the sliding groove. The connecting magnet is provided at the end of the connecting rod away from the cover plate. The opening and closing electromagnet is provided on the side wall of the sliding groove opposite to the connecting rod. The opening and closing electromagnet and the connecting magnet are magnetically attracted to each other. The opening and closing electromagnet is electrically connected to the liquid level detection device.

[0024] By adopting the above technical solution, and using an opening and closing electromagnet and a connecting magnet to control the cover plate, when the liquid level detection device detects that the liquid level in the collection tank is too high, it can electrically connect the liquid level detection device to the opening and closing electromagnet, thereby controlling the opening and closing electromagnet to be energized. This causes the opening and closing electromagnet to attract the connecting magnet, thus opening the cover plate. This reduces the possibility that when the cover plate is normally open, the air pump will draw air, allowing external air to enter the collection tank through the recovery pipe, resulting in a lower efficiency in discharging condensate from the cooling water circuit.

[0025] Optionally, a rebound spring is provided on the side wall of the sliding groove near the opening and closing electromagnet. The rebound spring is sleeved on the outside of the opening and closing electromagnet, and one end of the rebound spring near the connecting rod is connected to the side wall of the connecting rod. When the opening and closing electromagnet is attracted to the connecting magnet, the rebound spring is in a compressed state.

[0026] By adopting the above technical solution, a spring-loaded structure is used. When the opening and closing electromagnet is attracted to the connecting magnet, the spring-loaded spring is compressed. Therefore, when the liquid level in the recovery tank is low, the liquid level detection device detects that the liquid level in the recovery tank has not reached the height of the liquid level detection device. At this time, the opening and closing electromagnet is de-energized, and the spring-loaded spring resets the sealing plate due to its elasticity, so that the sealing plate completes the closure of the recovery tube, thus improving the airtightness when the liquid level in the recovery tank is low.

[0027] In summary, this application includes at least one of the following beneficial effects:

[0028] 1. When the permanent magnet direct drive drum motor of this application is in use, after the main shaft needs to be cooled after operation, condensate is injected into the cooling water circuit through the water inlet pipe to complete the cooling of the main shaft of the permanent magnet direct drive drum motor. After cooling is completed, the blower pump can be turned on to blow air into the condensate water circuit, so that the condensate in the condensate water circuit is discharged from the water storage pipe under pressure. Compared with the permanent magnet direct drive drum motor in related technologies, the permanent magnet direct drive drum motor of this application has less condensate in the condensate water circuit after cooling, so new condensate can be injected for the next use, thus improving the heat dissipation effect of the permanent magnet direct drive drum motor.

[0029] 2. Using a commercial control lever and its mechanism, the operator can rotate the lever, causing the ball head to rotate within the arc-shaped groove. Because the control lever is threadedly connected to the control hole, it can move vertically as it rotates, with the ball head sliding within the arc-shaped groove. Since the baffle plate is hinged to the inner wall of the water inlet pipe, it is controlled to rotate towards the water inlet pipe, resulting in smoother and more efficient airflow from the blower pump. Similarly, when the baffle plate is rotated away from the water inlet pipe by the control lever, water inflow is smoother, improving the convenience of condensate filling.

[0030] 3. By using an opening and closing electromagnet and a connecting magnet to control the cover plate, when the liquid level detection device detects that the liquid level in the collection tank is too high, it can electrically connect the liquid level detection device to the opening and closing electromagnet, thereby controlling the opening and closing electromagnet to be energized. This causes the opening and closing electromagnet to attract the connecting magnet, opening the cover plate. This reduces the possibility that when the cover plate is normally open, the air pump will draw air in, allowing external air to enter the collection tank through the recovery pipe, resulting in a lower efficiency in discharging condensate from the cooling water circuit. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0032] Figure 2 This is a schematic diagram illustrating the connection between the blower duct and the blower pump in an embodiment of this application;

[0033] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0034] Figure 4 for Figure 3 Enlarged schematic diagram of part B;

[0035] Figure 5 This is a schematic diagram illustrating the connection relationship between the spindle and the stator in an embodiment of this application;

[0036] Figure 6 for Figure 5 An enlarged schematic diagram of section C.

[0037] In the diagram: 1. Spindle; 11. Stator; 12. Mounting base; 13. Cooling water passage; 14. Inlet pipe; 15. Outlet pipe; 16. Blower pipe; 17. Blower pump; 2. Baffle plate; 21. Connecting straight groove; 22. Locking circular groove; 23. Control rod; 24. Control hole; 3. Sealing ring; 31. Sealing ring; 4. Recovery box; 41. Air pump; 5. Recovery hole; 51. Recovery pipe; 52. Cover plate; 6. Opening and closing structure; 61. Opening and closing electromagnet; 62. Connecting magnet; 63. Sliding groove; 64. Connecting rod; 65. Return spring. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0039] This application discloses a permanent magnet direct-drive drum motor with heat dissipation function. (Refer to...) Figure 1 A permanent magnet direct-drive drum motor with heat dissipation function includes a mounting base 12, which is vertically mounted on the ground. A main shaft 1 is mounted on the mounting base 12, and a stator 11 is mounted on the outer wall of the main shaft 1, with a cavity between the stator 11 and the main shaft 1. A cooling water passage 13 is installed in the cavity. The cooling water passage 13 is tubular and wound around the main shaft 1. One end of the cooling water passage 13 is an inlet pipe 14, and the other end is an outlet pipe 15. The cross-section of both the inlet pipe 14 and the outlet pipe 15 is square, and the inner hole of the inlet pipe 14 and the outlet pipe 15 is circular. When heat dissipation of the permanent magnet direct-drive drum motor is required, condensate is injected into the inlet pipe 14. The condensate passes through the cooling water passage 13 and is discharged from the outlet to cool the main shaft 1.

[0040] Reference Figure 2 and Figure 3The inner hole of the cooling water passage 13 is a circular hole, and the diameter of the inner hole of the cooling water passage 13 is larger than the diameter of the inner hole of the inlet pipe 14. A blower pipe 16 is connected to the side wall of the cooling water passage 13, and the blower pipe 16 is connected to the cooling water passage 13. A blower pump 17 is installed in the blower pipe 16, and the blower pump 17 blows air in the direction of liquid flow in the cooling water passage 13. A baffle plate 2 is hinged to the inner side wall of the cooling water passage 13. The baffle plate 2 is bent towards the inlet pipe 14, and the area of ​​the baffle plate 2 is larger than the cross-sectional area of ​​the inner hole of the inlet pipe 14, thereby covering the inlet pipe 14.

[0041] Reference Figure 2 and Figure 3 An arc-shaped groove is formed on the side wall of the wind deflector 2 near the water inlet pipe 14. The arc-shaped groove includes a connecting straight groove 21 and a locking circular groove 22. The connecting straight groove 21 is formed on the side wall of the wind deflector 2, and the locking circular groove 22 is formed on the side wall of the wind deflector 2, with the locking circular groove 22 located on the side of the connecting straight groove 21 away from the water inlet pipe 14. The locking circular groove 22 is connected to the connecting straight groove 21. A ball head is inserted into the locking circular groove 22, and the ball head can rotate circumferentially within the locking circular groove 22. A control rod 23 is welded and fixed to the side wall of the ball head, and the control rod 23 is inserted into the connecting straight groove 21. The end of the control rod 23 furthest from the ball head is threaded. A control hole 24 is threaded through the side wall of the water inlet pipe 14. The control rod 23 is threadedly inserted into the control hole 24. A sealing ring 3 is threadedly fitted onto the end of the control rod 23 extending out of the water inlet pipe 14. A sealing ring 31 is fitted onto the outer wall of the sealing ring 3. The sealing ring 3 can rotate to fit against the outer wall of the water inlet pipe 14, thereby sealing the control rod 23 and the control hole 24. By using the control rod 23 and its mechanism, the angle of the baffle plate 2 can be controlled by rotating the control rod 23, causing the ball head to rotate and slide within the arc groove.

[0042] Reference Figure 2 and Figure 4 The end of the outlet pipe 15 furthest from the cooling water circuit 13 is connected to a recovery tank 4 via a flange. The recovery tank 4 is a hollow box structure, and a liquid level detection device, which is a liquid level sensor, is installed on the side wall of the recovery tank 4. An air pump 41 is installed on the side wall of the recovery tank 4 to extract air from the recovery tank 4 and the cooling water circuit 13, thereby reducing the pressure inside the recovery tank 4 to facilitate the discharge of condensate from the cooling water circuit 13.

[0043] Reference Figure 4 , Figure 5 and Figure 6A recovery hole 5 is provided through the side wall of the recovery tank 4 along the wall thickness direction. The recovery hole 5 is located below the liquid level detection device. A recovery tube 51 is inserted into the recovery hole 5, and a sliding groove 63 is provided on the side wall of the recovery hole 5. A connecting rod 64 is inserted into the sliding groove 63 and is slidably connected to the sliding groove 63. A sealing plate 52 for sealing the recovery tube 51 is welded and fixed to the end of the connecting rod 64 near the recovery hole 5. An opening and closing structure 6 is provided at the end of the connecting rod 64 away from the sealing plate 52. The opening and closing structure 6 includes an opening and closing electromagnet 61 and a connecting magnet 62. The opening and closing electromagnet 61 is installed on the side wall of the sliding groove 63 opposite to the connecting rod 64. The connecting magnet 62 is glued to the end of the connecting rod 64 near the opening and closing electromagnet 61. The opening and closing electromagnet 61 is electrically connected to the liquid level detection device. When the opening and closing electromagnet 61 is energized, it attracts the connecting magnet 62. A spring 65 is glued to the side wall of the sliding groove 63 near the opening and closing electromagnet 61. The end of the spring 65 near the connecting magnet 62 is glued to the side wall of the connecting rod 64. Thus, the spring 65 and the opening and closing structure 6 cooperate to realize the opening and closing of the cover plate 52 on the recovery pipe 51 under different liquid levels in the recovery tank 4.

[0044] The implementation principle of a permanent magnet direct-drive drum motor with heat dissipation function in this application embodiment is as follows: When the permanent magnet direct-drive drum motor of this application is in use, when it is necessary to cool the main shaft 1 of the permanent magnet direct-drive drum motor, condensate is injected into the cooling water channel 13 from the water inlet pipe 14. After condensation is completed, the blower pump 17 is turned on, and the control lever 23 is rotated so that the baffle plate 2 is in contact with the inner wall of the cooling water channel 13. Then, the vacuum pump 41 is turned on so that the vacuum pump 41 evacuates the gas in the recovery tank 4. At this time, the remaining cooling water in the cooling water channel 13 moves towards the recovery tank 4. When a large amount of cooling water is collected in the recovery tank 4, the liquid level detection device is triggered, the electromagnet 61 is energized, and the connecting magnet 62 is attracted, so that the cover plate 52 is opened, thereby completing the discharge of excess cooling water in the recovery tank 4. After the permanent magnet direct drive drum motor in this application has cooled down, less condensate remains in the condensate circuit, so that new condensate can be injected again when it is used next time, thus improving the heat dissipation effect of the permanent magnet direct drive drum motor.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A permanent magnet direct-drive drum motor with heat dissipation function, comprising a main shaft (1), a stator (11), and a mounting base (12), wherein the main shaft (1) is disposed on the mounting base (12), and the stator (11) is fixedly sleeved on the main shaft (1), characterized in that: A cooling water passage (13) is provided in the cavity formed by the main shaft (1) and the stator (11). The cooling water passage (13) is arranged around the outer wall of the main shaft (1). One end of the cooling water passage (13) is connected to an inlet pipe (14), and the other end is connected to an outlet pipe (15). A blower pipe (16) is connected to the side wall of the cooling water passage (13) near the inlet pipe (14). A blower pump (17) is provided in the blower port. The angle between the blower pipe (16) and the inlet pipe (14) is an acute angle. A baffle plate (2) is provided on the inner wall of the cooling water passage (13) near the water inlet pipe (14), and the baffle plate (2) is inclined toward the water inlet pipe (14); The baffle plate (2) is hinged to the inner wall of the cooling water channel (13). An arc-shaped groove is provided on the side wall of the baffle plate (2) near the water inlet pipe (14). A ball head is inserted in the arc-shaped groove. The ball head is adapted to the arc-shaped groove. A control rod (23) is provided on the side wall of the ball head. A control hole (24) is provided through the side wall of the water inlet pipe (14). The control rod (23) is threaded into the control hole (24). The cross-sectional area of ​​the wind deflector (2) is larger than the cross-sectional area of ​​the water inlet pipe (14).

2. A permanent magnet direct-drive drum motor with heat dissipation function according to claim 1, characterized in that: The control rod (23) is threaded with a sealing ring (3) at one end outside the water inlet pipe (14). The sealing ring (3) is fitted to the outer wall of the water inlet pipe (14), and a sealing ring (31) is fitted on the outer wall of the sealing ring (3).

3. A permanent magnet direct-drive drum motor with heat dissipation function according to claim 1, characterized in that: A recycling box (4) is detachably connected to the outer wall of the water outlet pipe (15).

4. A permanent magnet direct-drive drum motor with heat dissipation function according to claim 3, characterized in that: An air pump (41) is installed on the side wall of the recycling box (4), and the recycling box (4) is sealed to the water outlet pipe (15).

5. A permanent magnet direct-drive drum motor with heat dissipation function according to claim 3, characterized in that: A liquid level detection device is provided on the side wall of the recycling tank (4). A recycling hole (5) is opened on the side wall of the recycling tank (4). A recycling pipe (51) is provided in the recycling hole (5). The recycling pipe (51) is connected to the recycling tank (4). A sealing plate (52) for sealing the recycling pipe (51) is provided at one end of the recycling pipe (51) near the recycling tank (4). The length of the sealing plate (52) from the opposite side wall of the recycling tank (4) and the water outlet pipe (15) is less than the length of the liquid level sensor from the opposite side wall of the recycling tank (4) and the water outlet pipe (15). An opening and closing structure (6) for controlling the sealing plate (52) is provided on the side wall of the recycling tank (4).

6. A permanent magnet direct-drive drum motor with heat dissipation function according to claim 5, characterized in that: The opening and closing structure (6) includes an opening and closing electromagnet (61) and a connecting magnet (62). A sliding groove (63) is provided on the inner side wall of the recovery hole (5). A connecting rod (64) is provided on the side wall of the cover plate (52) near the sliding groove (63). The connecting rod (64) is slidably inserted into the sliding groove (63). The connecting magnet (62) is provided at the end of the connecting rod (64) away from the cover plate (52). The opening and closing electromagnet (61) is provided on the side wall of the sliding groove (63) opposite to the connecting rod (64). The opening and closing electromagnet (61) and the connecting magnet (62) are magnetically attracted to each other. The opening and closing electromagnet (61) is electrically connected to the liquid level detection device.

7. A permanent magnet direct-drive drum motor with heat dissipation function according to claim 6, characterized in that: A spring (65) is provided on the side wall of the sliding groove (63) near the opening and closing electromagnet (61). The spring (65) is sleeved on the outside of the opening and closing electromagnet (61). One end of the spring (65) near the connecting rod (64) is connected to the side wall of the connecting rod (64). When the opening and closing electromagnet (61) is attracted to the connecting magnet (62), the spring (65) is in a compressed state.

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