A uniform cooling device for an electric drum

Abstract

This invention belongs to the field of electric drum cooling technology, specifically referring to a uniform cooling device for an electric drum. It includes a support shaft, a stator fixedly connected to the support shaft, the stator being electrically connected to an external power source, a bracket fixedly connected to the support shaft, and baffles symmetrically fixedly connected to the support shaft on both sides of the stator. A drum is fitted onto the stator, and the inner circumferential wall of the drum is rotatably and sealingly connected to the baffles. This application utilizes cooling oil inside the drum to remove heat from the stator and rotor, and can also simultaneously drive a fan for air cooling. A telescopic spring detects the temperature in real time and can adjust its deformation according to the internal temperature of the drum. It can automatically and seamlessly switch between three states: dustproof sealing, air cooling, and liquid cooling, ensuring precise matching of heat dissipation intensity and equipment heat load, and also providing power-off protection under high load.

Description

Technical Field

[0001] This invention belongs to the field of electric drum cooling technology, specifically referring to a uniform cooling device for electric drums. Background Technology

[0002] Electric roller conveyors, which integrate a motor and reduction gear mechanism inside the roller, are widely used in conveying equipment in mining, logistics, and metallurgy industries due to their compact structure, high transmission efficiency, and good sealing performance. However, with the increasing demands for power density and continuous operation capacity from industrial development, the heat dissipation problem of electric roller conveyors is becoming increasingly prominent.

[0003] Currently, cooling oil is injected inside the drum, and the heat is carried away by the circulation of the oil. Although this method is more efficient than air cooling, the heat of the oil still needs to be dissipated through the drum shell. If the external heat dissipation is not timely, the oil temperature can easily rise continuously, and the cooling effect will drop sharply. Moreover, in dusty environments, opening heat dissipation holes will allow dust to enter, affecting the performance of the oil and the life of the components, and it is impossible to adaptively adjust according to the real-time temperature of the drum. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a uniform cooling device for electric drums. This application utilizes cooling oil inside the drum to remove heat from the stator and rotor, simultaneously driving a fan for air cooling. A telescopic spring monitors the temperature in real time and adjusts its deformation according to the drum's internal temperature. Based on the drum's internal temperature, it automatically and seamlessly switches between three states: dustproof sealing, air cooling, and liquid cooling. When the temperature is below a set threshold, dustproofing is implemented. When the temperature rises to the point of triggering shape memory alloy deformation, the heat dissipation holes automatically open. If the temperature continues to rise, spray cooling is applied to the outer wall of the drum. This ensures precise matching of heat dissipation intensity with the equipment's thermal load and also provides power-off protection under high loads. This solves the technical problems of existing technologies that cannot automatically adjust heat dissipation intensity based on internal temperature and effectively prevent dust at low temperatures.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present solution proposes a uniform cooling device for an electric drum, including a support shaft, a stator fixedly connected to the support shaft, the stator being electrically connected to an external power source, a bracket fixedly connected to the support shaft, baffles symmetrically fixedly connected to the support shaft and disposed on both sides of the stator, a drum sleeved on the stator, the inner circumferential wall of the drum being rotatably and sealingly connected to the baffles, a rotor fixedly connected to the inner circumferential wall of the drum, the rotor being coaxially arranged with the stator, and heat dissipation holes being arranged in a ring array through the drum, with sealing plates respectively fitted at both ends of the heat dissipation holes.

[0006] Preferably, a guide rod is fixedly connected to the side wall of the sealing plate, and a guide cylinder is slidably sleeved on the guide rod. The outer circumferential wall of the guide cylinder is fixedly connected to the circumferential wall of the heat dissipation hole. A telescopic spring is fixedly connected to the other end of the guide rod and the base end of the guide cylinder. A return spring is fixedly connected between the base end of the guide cylinder and the side wall of the sealing plate. The telescopic spring deforms during heating.

[0007] Preferably, a driving rod is fixedly connected to the side wall of the sealing plate, and the top end of the driving rod is slidably connected to the circumferential wall of the heat dissipation hole. A second switch is fixedly connected to the circumferential wall of the heat dissipation hole, and the second switch is close to the sealing plate. The second switch is electrically connected to an external power source. A first switch is slidably connected longitudinally to the circumferential wall of the heat dissipation hole. The first switch is located below the top end of the driving rod, and a guide spring is fixedly connected between the bottom wall of the first switch and the top wall of the second switch.

[0008] Preferably, a rotating gear is rotatably connected to one end of the support shaft, and an intermediate gear is rotatably connected to the side wall of the baffle on one side. A gear ring is coaxially fixedly connected to the inner circumferential wall of the drum. The intermediate gear meshes with the gear ring and the rotating gear. A fan is coaxially fixedly connected to the rotating gear, and the fan is rotatably mounted on the support shaft. The rotation of the drum drives the fan to rotate, thereby cooling the drum. When the sealing plate moves away from the heat dissipation hole, it can also cool the inside of the heat dissipation hole.

[0009] Preferably, a connecting box is fixedly connected to one end of the bracket. The connecting box is located on one side of the roller and is hollow. Electromagnetic nozzles are fixedly connected to the top wall of the connecting box in a linear array. The electromagnetic nozzles are electrically connected to a first switch. The connecting box is connected to an external water pipe and a water pump. The water pump pumps coolant into the connecting box. When the first switch is touched, the electromagnetic nozzles are turned on and spray cooling liquid onto the outer surface of the roller.

[0010] The beneficial effects achieved by the present invention using the above structure are as follows: 1. This application utilizes the cooling oil inside the drum to remove heat from the stator and rotor, and can also simultaneously drive the fan for air cooling. The telescopic spring detects the temperature in real time and can adjust its deformation according to the internal temperature of the drum. It can automatically and seamlessly switch between three states: dustproof sealing, air cooling, and liquid cooling, depending on the internal temperature of the drum. When the temperature is below the set threshold, dustproofing is activated. When the temperature rises to the point that the shape memory alloy is triggered to deform, the heat dissipation holes automatically open. If the temperature continues to rise, the outer wall of the drum is sprayed with cooling water, ensuring that the heat dissipation intensity is precisely matched with the heat load of the equipment. It can also provide power-off protection under high load.

[0011] 2. The telescopic spring located inside the heat dissipation hole is made of nickel-titanium-based shape memory alloy. Its physical length changes with temperature. When the temperature reaches its preset deformation temperature, it drives the sealing plate to move, thereby opening the heat dissipation hole. When the temperature drops, the shape memory alloy spring loses power, and the reset spring drives the sealing plate to reset and re-close the heat dissipation hole. When the temperature rise causes the sealing plate to move a large distance, the electromagnetic nozzle is activated to spray liquid cooling. If the temperature gets out of control and liquid cooling cannot suppress it, the first switch and the second switch contact each other to cut off the main power supply.

[0012] 3. This application utilizes the rotational kinetic energy of the drum itself and achieves synchronous drive of the cooling fan through a transmission mechanism composed of a gear ring, intermediate gear and rotating gear, ensuring a positive correlation between heat dissipation air volume and equipment operating speed. The faster the operation, the stronger the heat dissipation. 4. This application utilizes the cooling oil in the internal cavity of the drum and the rotational motion of the drum to achieve uniform and efficient indirect cooling of core heat-generating components such as the stator and rotor. The rotating drum drives the cooling oil to continuously tumble, avoiding heat accumulation, and the heat is evenly discharged through the drum wall and carried away by external air cooling. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the invention and do not constitute a limitation thereof.

[0014] Figure 1 This is a schematic diagram of the overall structure of a uniform cooling device for an electric drum proposed in this invention; Figure 2 This is a schematic cross-sectional view of the overall structure of a uniform cooling device for an electric drum proposed in this invention; Figure 3 This is a schematic cross-sectional view of the overall structure of a uniform cooling device for an electric drum proposed in this invention. Figure 4 This is a schematic diagram of the sealing plate connection structure of a uniform cooling device for an electric drum proposed in this invention; Figure 5 This is a schematic diagram of the drum connection structure of a uniform cooling device for an electric drum proposed in this invention.

[0015] In the attached diagram: 1. Bracket, 2. Roller, 3. Support shaft, 4. Stator, 5. Rotor, 6. Baffle, 7. Sealing plate, 11. Connecting box, 12. Electromagnetic nozzle, 21. Heat dissipation hole, 22. Guide cylinder, 23. Guide rod, 24. Telescopic spring, 25. Return spring, 26. Gear ring, 61. Intermediate gear, 62. Rotary gear, 63. Fan, 71. Drive rod, 72. First switch, 73. Guide spring, 74. Second switch.

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Example 1, as Figures 1-5 As shown, the proposed solution provides a uniform cooling device for an electric drum, comprising a support shaft 3, a stator 4 fixedly connected to the support shaft 3, the stator 4 being electrically connected to an external power source, a bracket 1 fixedly connected to the support shaft 3, baffles 6 symmetrically fixedly connected to the support shaft 3 and disposed on both sides of the stator 4, a drum 2 sleeved on the stator 4, the inner circumferential wall of the drum 2 being rotatably and sealingly connected to the baffles 6, a cavity being provided between the inner circumferential wall of the drum 2 and the side walls of the baffles 6 on both sides, the cavity being filled with cooling oil, and filling ports being provided on the baffles 6 on both sides, through which the cooling oil is injected into the cavity, a rotor 5 fixedly connected to the inner circumferential wall of the drum 2, the rotor 5 being coaxially arranged with the stator 4, and heat dissipation holes 21 being provided in a circular array through the drum 2, with sealing plates 7 respectively fitted at both ends of the heat dissipation holes 21.

[0019] like Figures 1-4 As shown, a guide rod 23 is fixedly connected to the side wall of the sealing plate 7. A guide cylinder 22 is slidably sleeved on the guide rod 23. The outer circumferential wall of the guide cylinder 22 is fixedly connected to the circumferential wall of the heat dissipation hole 21. A telescopic spring 24 is fixedly connected to the base end of the guide rod 23 and the base end of the guide cylinder 22. The telescopic spring 24 is a shape memory alloy, specifically a nickel-titanium alloy. A return spring 25 is fixedly connected between the base end of the guide cylinder 22 and the side wall of the sealing plate 7. The telescopic spring 24 elongates and deforms when heated. When the temperature is lower than the set deformation temperature, the telescopic spring 24 will not deform. When the telescopic spring 24 is heated, the telescopic spring 24 deforms and drives the sealing plate 7 away from the heat dissipation hole 21 through the guide rod 23. The return spring 25 is not initially compressed. When the telescopic spring 24 deforms, it stretches the return spring 25. The temperature of the telescopic spring 24 decreases, and it returns to its original shape. At the same time, the return spring 25 returns to its original position. A driving rod 71 is fixedly connected to the side wall of the sealing plate 7. The top end of the driving rod 71 is slidably connected to the circumferential wall of the heat dissipation hole 21. A second switch 74 is fixedly connected to the circumferential wall of the heat dissipation hole 21 and is close to the sealing plate 7. The second switch 74 is electrically connected to an external power source. A first switch 72 is slidably connected longitudinally to the circumferential wall of the heat dissipation hole 21. The first switch 72 is located below the top end of the driving rod 71. A guide spring 73 is fixedly connected between the bottom wall of the first switch 72 and the top wall of the second switch 74. The first switch 72 and the second switch 74 are self-resetting switches.

[0020] like Figures 1-3 and Figure 5 As shown, a rotating gear 62 is rotatably connected to one end of the support shaft 3, and an intermediate gear 61 is rotatably connected to the side wall of the baffle 6 on one side. A gear ring 26 is coaxially fixedly connected to the inner circumferential wall of the roller 2. The intermediate gear 61 meshes with the gear ring 26 and the rotating gear 62. A fan 63 is coaxially fixedly connected to the rotating gear 62, and the fan 63 is rotatably mounted on the support shaft 3. The rotation of the roller 2 drives the fan 63 to rotate, thereby cooling the roller 2. When the sealing plate 7 moves away from the heat dissipation hole 21, it can also cool the inside of the heat dissipation hole 21.

[0021] like Figures 1-3 As shown, a connecting box 11 is fixedly connected to one end of the bracket 1. The connecting box 11 is located on one side of the roller 2. The connecting box 11 is hollow. Electromagnetic nozzles 12 are fixedly connected to the top wall of the connecting box 11 in a linear array. The electromagnetic nozzles 12 are electrically connected to the first switch 72. The connecting box 11 is connected to an external water pipe and an external water pump. The first switch 72 is also electrically connected to the external water pump. The external water pump pumps coolant into the connecting box 11. When the first switch 72 is touched, the electromagnetic nozzles 12 are turned on and spray cooling liquid onto the outer surface of the roller 2.

[0022] In practical use, the support shaft 3 is placed on the bearing seat, the belt is sleeved on the surface of the drum 2 and the belt is sleeved on the bracket 1, the external power supply is electrically connected to the stator 4, the connecting box 11 is connected to the external water pipe and water pump, and the cooling oil is injected into the cavity between the inner circumferential wall of the drum 2 and the side walls of the baffles 6 on both sides. When the stator 4 is powered on, a high-speed rotating magnetic field is generated, which drives the rotor 5 to start rotating around the stator 4. The rotor 5 drives the drum 2 to rotate on the baffles 6. When the drum 2 rotates, it drives the cooling oil to tumble, which cools the stator 4. The heat of the cooling oil is cooled through heat conduction through the drum 2. When the drum 2 rotates, it also drives the gear ring 26 to rotate. The gear ring 26 drives the rotating gear 62 to rotate through the intermediate gear 61. The rotating gear 62 drives the fan 63 to rotate and blow air towards the drum 2. The airflow is used to cool the drum 2 and thus cool the cooling oil. When the cooling oil dissipates heat through the roller 2, the temperature inside the heat dissipation hole 21 heats the telescopic spring 24. When the telescopic spring 24 does not reach the set deformation temperature, the telescopic spring 24 will not change. The sealing plates 7 on both sides seal the heat dissipation hole 21 to prevent dust from entering the heat dissipation hole 21. When the medium power is running, the temperature of the cooling oil rises. When the temperature inside the heat dissipation hole 21 reaches the deformation temperature set by the telescopic spring 24, the telescopic spring 24 deforms. The telescopic spring 24 pushes the guide rod 23 to move inside the guide cylinder 22. The guide rod 23 drives the sealing plate 7 away from the heat dissipation hole 21, stretching the reset spring 25. When the sealing plate 7 moves, it pushes the driving rod 71 to move. At this time, the driving rod 71 is not in contact with the first switch 72. The fan 63 blows airflow into the heat dissipation hole 21. The airflow carries the heat inside the heat dissipation hole 21 out and dissipates heat from the inside of the roller 2. The temperature inside the heat dissipation hole 21 decreases, the telescopic spring 24 cools down, the telescopic spring 24 stops deforming and gradually returns to its original shape. Then the reset spring 25 resets, driving the sealing plate 7 and the guide rod 23 to reset. When operating at high power, the fan 63 cools the heat dissipation hole 21. When the temperature inside the heat dissipation hole 21 does not decrease and continues to rise, the telescopic spring 24 pushes the guide rod 23 to move inside the guide cylinder 22. The guide rod 23 drives the sealing plate 7 to move. The sealing plate 7 pushes the driving rod 71 to contact the first switch 72. The external water pump and electromagnetic nozzle 12 start, spraying coolant onto the circumferential wall of the roller 2 to reduce the temperature. The temperature inside the heat dissipation hole 21 decreases, the telescopic spring 24 cools down, the telescopic spring 24 stops deforming and gradually returns to its original shape. Then the reset spring 25 resets, driving the sealing plate 7 and the guide rod 23 to reset. The driving rod 71 stops contacting the first switch 72, and the electromagnetic nozzle 12 stops. When the temperature runs out of control, the coolant sprayed by the electromagnetic nozzle 12 can no longer cool down. The extension spring 24 drives the sealing plate 7 and the driving rod 71 to move through the guide rod 23. The driving rod 71 drives the first switch 72 to move, compressing the guide spring 73. When the first switch 72 contacts the second switch 74, the external power supply stops, cutting off the power and preventing catastrophic accidents.

[0023] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A uniform cooling device for an electric drum, comprising a support shaft (3), wherein a stator (4) is fixedly connected to the support shaft (3), characterized in that: The stator (4) is electrically connected to an external power source. A bracket (1) is fixedly connected to the support shaft (3). A baffle (6) is symmetrically fixedly connected to the support shaft (3), and the baffle (6) is located on both sides of the stator (4). A roller (2) is sleeved on the stator (4). The inner circumferential wall of the roller (2) is rotatably sealed to the baffle (6). A cavity is provided between the inner circumferential wall of the roller (2) and the side walls of the baffle (6) on both sides. Cooling oil is filled into the cavity. A rotor (5) is fixedly connected to the inner circumferential wall of the roller (2). The rotor (5) is coaxially arranged with the stator (4). Heat dissipation holes (21) are provided in a ring array on the roller (2). A sealing plate (7) is respectively fitted at both ends of the heat dissipation holes (21). The sealing plate (7) is fixedly connected to a guide rod (23) on its side wall. A guide cylinder (22) is slidably sleeved on the guide rod (23). The outer circumferential wall of the guide cylinder (22) is fixedly connected to the circumferential wall of the heat dissipation hole (21). The other end of the guide rod (23) is fixedly connected to the base end of the guide cylinder (22) with a telescopic spring (24). The telescopic spring (24) elongates and deforms when heated. The sealing plate (7) has a drive rod (71) fixedly connected to its side wall, and the top of the drive rod (71) is slidably connected to the circumferential wall of the heat dissipation hole (21). A second switch (74) is fixedly connected to the circumferential wall of the heat dissipation hole (21), and the second switch (74) is close to the sealing plate (7). The second switch (74) is electrically connected to the external power supply. A first switch (72) is longitudinally slidably connected to the circumferential wall of the heat dissipation hole (21). When the device is running at medium power, the driving rod (71) does not contact the first switch (72). When the device is running at high power, the telescopic spring (24) pushes the driving rod (71) to move through the guide rod (23) and the sealing plate (7). When the driving rod (71) moves, it will touch the first switch (72). When the device temperature is out of control, the telescopic spring (24) pushes the driving rod (71) to continue to move. The driving rod (71) drives the first switch (72) to move, so that the first switch (72) touches the second switch (74), and the external power supply stops. The support (1) has a connecting box (11) fixedly connected to its inner top wall. The top wall of the connecting box (11) is connected to an electromagnetic nozzle (12) in a linear array. The electromagnetic nozzle (12) is electrically connected to the first switch (72).

2. The uniform cooling device for an electric drum according to claim 1, characterized in that: One end of the support shaft (3) is rotatably connected to a rotating gear (62), and the side wall of the baffle (6) on one side is rotatably connected to an intermediate gear (61). The inner circumferential wall of the roller (2) is coaxially fixedly connected to a toothed ring (26). The intermediate gear (61) meshes with the toothed ring (26) and the rotating gear (62). A fan (63) is coaxially fixedly connected to the rotating gear (62).

3. The uniform cooling device for an electric drum according to claim 1, characterized in that: The telescopic spring (24) is a shape memory alloy.

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