High-temperature self-protecting fan for air ventilating unit of production workshop

Abstract

The application relates to a high-temperature self-protection fan of an air ventilating fan unit for a production workshop, which comprises a machine shell, a machine base fixed at the bottom of the machine shell, a base fixed at the inner bottom of the machine shell, a motor fixed at the upper end of the base, the motor being a double-head motor and two output shafts of the motor being connected with air feeding mechanisms, the air feeding mechanism comprising a driving box in sealing rotation connection with the output shaft of the motor, a mounting head fixed at the side wall of the driving box, a plurality of groups of centrifugal blades fixed at the side wall of the mounting head, and a driving plate fixed at the side wall of the output shaft of the motor. The two groups of current variable liquids are alternately electrified, the two groups of centrifugal blades can alternately work, the fatigue damage caused by the long-time action of single blades can be reduced to a certain extent, the maintenance period of the whole equipment is greatly increased, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of fan technology, and in particular to a high-temperature self-protection fan for air ventilation units used in production workshops. Background Technology

[0002] In industrial production workshops, effective ventilation is required to ensure the health of workers, and fans are usually installed on the walls for ventilation.

[0003] After the fan has been running for a long time, the motor temperature is prone to become too high due to the long-term operation of the motor, which will affect the service life of the motor.

[0004] Furthermore, due to prolonged operation, dust accumulates on the impeller blades, causing impeller imbalance. This leads to excessive vibration during fan operation, damaging transmission components such as bearings and affecting the fan's lifespan. To ensure the normal operation of the fan, the impeller blades must be cleaned regularly. However, to avoid affecting the production of machinery and equipment in the workshop, the fans are usually installed at a high position, making blade cleaning very troublesome. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of poor heat dissipation of fans in the prior art, and to propose a high-temperature self-protection fan for air ventilation units in production workshops.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-temperature self-protecting fan for an air ventilation unit in a production workshop, comprising a housing, a base fixed to the bottom of the housing, a base fixed to the inner bottom of the housing, a motor fixed to the upper end of the base, the motor being a dual-head motor with both output shafts connected to an air supply mechanism, the air supply mechanism including a drive box sealed and rotatably connected to the motor output shaft, an mounting head fixed to the side wall of the drive box, multiple sets of centrifugal blades fixed to the side wall of the mounting head, a drive plate fixed to the side wall of the motor output shaft, the drive box being filled with electrorheological fluid that encloses the drive plate, and a controller installed at the bottom of the housing for controlling the alternating power supply of the two sets of electrorheological fluid.

[0007] In the high-temperature self-protecting fan of the air ventilation unit for the production workshop mentioned above, the centrifugal blade includes a base sleeve, which is fixed to the side wall of the mounting head. The inner wall of the base sleeve is slidably connected with a telescopic blade, and the telescopic blade and the bottom of the base sleeve are both fixed with a centrifugal spring.

[0008] In the high-temperature self-protection fan of the air ventilation unit for the production workshop mentioned above, a heat dissipation box is fixed to the outer wall of the casing, a distribution pipe and two sets of single-sided pipes are fixed to the side wall of the motor, the distribution pipe and the single-sided pipes are connected through a transfer pipe, the distribution pipe and the heat dissipation box are connected through a central pipe, the single-sided pipe and the heat dissipation box are connected through an alternating drive mechanism, and a sensor is fixed to the side wall of the motor. The sensor is used to sense the temperature of the motor and transmit the signal to the controller.

[0009] In the high-temperature self-protecting fan of the air ventilation unit for the production workshop mentioned above, the alternating drive mechanism includes a transfer sleeve that is rotatably and sealed to the outer wall of the drive box. A spacer ring is fixed to the inner wall of the transfer sleeve. The spacer ring is sealed to the outer wall of the drive box. An input pipe and an output pipe are inserted into the upper end of the transfer sleeve. The input pipe and the output pipe are respectively connected to a single-sided pipe and a heat dissipation box. The input pipe and the output pipe are respectively located on both sides of the spacer ring.

[0010] In the high-temperature self-protected fan of the air ventilation unit for the production workshop mentioned above, a pumping box is fixed to the inner wall of the drive box. The pumping box is connected to the transfer sleeve through an inlet pipe and an extrusion pipe. The inlet pipe and the extrusion pipe are located on both sides of the partition ring, and a one-way valve is provided inside the inlet pipe and the extrusion pipe.

[0011] In the high-temperature self-protecting fan of the air ventilation unit for the production workshop mentioned above, the inner wall of the pump box is sealed and slidably connected with a piston plate, the side wall of the piston plate is fixed with a connecting rod, the connecting rod passes through the pump box and is fixed with a top plate, the piston plate and the inner wall of the pump box are jointly fixed with a piston spring, and the end face of the top plate is an arc surface and abuts against the driving plate.

[0012] Compared with existing technologies, the advantages of this invention are:

[0013] Alternating energization of the two sets of electrorheological fluids allows the two sets of centrifugal blades to work alternately, which can reduce the excessive fatigue damage caused by prolonged operation of a single blade to a certain extent, thus significantly increasing the maintenance cycle of the entire equipment and reducing maintenance costs.

[0014] When needed, the two sets of centrifugal blades can be installed in opposite directions, so that the wind driving direction of the two sets of centrifugal blades is different, thereby realizing the alternation of air intake and exhaust. When the ventilation position is not good, the rapid exchange of internal and external air can be completed through a single ventilation hole. Especially for rapid ventilation of local areas, it can achieve rapid ventilation of small areas over a large area.

[0015] Under centrifugal force, the telescopic blades will extend out of the base sleeve, thereby increasing the wind power driving intensity. The extension length is directly proportional to the motor speed, that is, the faster the speed, the longer the blades, and the stronger the overall wind force. Combined with the wind force increased by the speed itself, it is possible to quickly adjust the wind force.

[0016] Because the blades are very short at low speeds, the overall range between the minimum and maximum wind speeds is larger compared to blades of fixed length, which allows for better adaptation to wind power requirements.

[0017] Dust adhering to the surface of the telescopic blades can be scraped off and discharged, enabling the blades to self-clean and thus avoiding the reduction in wind power efficiency caused by dust accumulation. At the same time, timely cleaning of dust can prevent the accumulation inside from affecting heat dissipation, which helps maintain the effective operating temperature of the motor.

[0018] The sensor detects the motor's operating temperature and starts the coolant circulation to cool it down when the temperature is high. When the temperature is abnormally high, the motor stops running to avoid irreversible damage and ensure the motor's safe use.

[0019] When heat dissipation is not required, the elastic force of the piston spring is insufficient to overcome the pressure difference, which prevents the piston plate from returning to its original position. This prevents the top plate from contacting and colliding with each other during the subsequent rotation of the driving plate, thereby reducing operating losses, reducing the load on the motor, and making the whole system more energy-efficient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a high-temperature self-protecting fan for an air ventilation unit in a production workshop, as proposed in this invention.

[0021] Figure 2 This is a front view of a high-temperature self-protecting fan for an air ventilation unit in a production workshop, as proposed in this invention.

[0022] Figure 3 This is a side view of a high-temperature self-protecting fan for an air ventilation unit in a production workshop, as proposed in this invention.

[0023] Figure 4 This is a side sectional view of a high-temperature self-protecting fan for an air ventilation unit in a production workshop, as proposed in this invention.

[0024] Figure 5 This is a schematic diagram of the centrifugal blades of a high-temperature self-protecting fan for an air ventilation unit in a production workshop, as proposed in this invention.

[0025] Figure 6 This is a schematic diagram of the internal structure of the drive box of a high-temperature self-protecting fan for an air ventilation unit in a production workshop, as proposed in this invention.

[0026] In the diagram: 1. Housing, 2. Base, 3. Socket, 4. Motor, 5. Drive box, 6. Drive plate, 7. Mounting head, 8. Base sleeve, 9. Centrifugal spring, 10. Telescopic blade, 11. Sensor, 12. Controller, 13. Heat sink, 14. Distribution pipe, 15. Single-sided pipe, 16. Transfer pipe, 17. Transfer sleeve, 18. Input pipe, 19. Output pipe, 20. Centralized pipe, 21. Spacer ring, 22. Pump box, 23. Inlet pipe, 24. Extrusion pipe, 25. Piston plate, 26. Connecting rod, 27. Top plate, 28. Piston spring. Detailed Implementation

[0027] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention. Example

[0028] Reference Figure 1-5 A high-temperature self-protected fan for an air ventilation unit in a production workshop includes a housing 1, a base 2 fixed to the bottom of the housing 1, a base 3 fixed to the inner bottom of the housing 1, a motor 4 fixed to the upper end of the base 3, the motor 4 being a double-headed motor with both output shafts connected to an air supply mechanism, the air supply mechanism including a drive box 5 sealed and rotatably connected to the output shaft of the motor 4, an mounting head 7 fixed to the side wall of the drive box 5, multiple sets of centrifugal blades fixed to the side wall of the mounting head 7, a drive plate 6 fixed to the side wall of the output shaft of the motor 4, the interior of the drive box 5 being filled with electrorheological fluid, the electrorheological fluid wrapping the drive plate 6, and a controller 12 installed at the bottom of the housing 1, the controller 12 being used to control the alternating power supply of the two sets of electrorheological fluids;

[0029] When energized, the electrorheological fluid changes from a liquid to a solid state, making the drive plate 6 and drive box 5 a single unit. This allows the motor 4 to drive the drive box 5 to rotate, which in turn drives the centrifugal blades to rotate, thus completing the wind power transmission. When the electrorheological fluid is not energized, it remains liquid, allowing the drive plate 6 to rotate on its own without affecting the drive box 5, and preventing the centrifugal blades from rotating. Therefore, by alternately energizing the two sets of electrorheological fluids, the two sets of centrifugal blades can work alternately, which can reduce the excessive fatigue damage caused by prolonged operation of a single blade to a certain extent. This significantly increases the maintenance cycle of the entire equipment and reduces maintenance costs.

[0030] When needed, the two sets of centrifugal blades can be installed in opposite directions, so that the wind driving directions of the two sets of centrifugal blades are different, thereby realizing the alternation of air intake and exhaust. When the ventilation position is poor, the rapid exchange of internal and external air can be completed through a single ventilation hole. Especially for rapid ventilation of local areas, it can achieve rapid ventilation of small areas over a large area.

[0031] The centrifugal blade includes a base sleeve 8, which is fixed to the side wall of the mounting head 7. The inner wall of the base sleeve 8 is sealed and slidably connected to a telescopic blade 10. The telescopic blade 10 and the bottom of the base sleeve 8 are both fixed with a centrifugal spring 9. Under centrifugal action, the telescopic blade 10 will extend out of the base sleeve 8, thereby increasing the wind power drive intensity. The extension length is directly proportional to the speed of the motor 4, that is, the faster the speed, the longer the blade, and the stronger the overall wind power. Combined with the wind power increased by the speed itself, the wind power can be quickly adjusted. Furthermore, since the blade is very short at low speed, compared with blades of fixed length, the overall minimum and maximum wind speed and air volume range is larger, which can better adapt to wind power requirements.

[0032] During alternating operation, the originally extended telescopic blade 10 will be reset under the elastic force of the centrifugal spring 9, thereby scraping against the port of the base sleeve 8 during the reset process. This allows the dust attached to the surface of the telescopic blade 10 to be scraped off and discharged, achieving self-cleaning of the blade. This avoids the reduction in wind power drive efficiency caused by dust accumulation. At the same time, timely cleaning of dust can prevent the accumulation inside from affecting heat dissipation, which is beneficial to maintaining the effective operating temperature of the motor 4.

[0033] Reference Figure 4 and Figure 6 A heat sink 13 is fixed to the outer wall of the casing 1. A distribution pipe 14 and two sets of single-sided pipes 15 are fixed to the side wall of the motor 4. The distribution pipe 14 and the single-sided pipes 15 are connected by a transfer pipe 16. The distribution pipe 14 and the heat sink 13 are connected by a central pipe 20. The distribution pipe 14 transfers the low-temperature cooling liquid in the heat sink 13 to the two single-sided pipes 15. The distribution pipe 14 and the single-sided pipes 15 surround the motor 4, so heat exchange between the coolant and the motor 4 can be achieved, thereby maintaining the operating temperature of the motor 4. The single-sided pipes 15 are connected to the heat sink 13 through an alternating drive mechanism. A sensor 11 is fixed to the side wall of the motor 4. The sensor 11 is used to sense the temperature of the motor 4 and transmit the signal to the controller 12. The sensor 11 senses the operating temperature of the motor 4. When the temperature is high, the coolant circulation is started to cool down. When the temperature is abnormally high, the operation of the motor 4 is stopped to avoid irreversible damage and ensure the safe use of the motor 4.

[0034] The alternating drive mechanism includes a transfer sleeve 17 that is rotatably and sealingly connected to the outer wall of the drive box 5. A spacer ring 21 is fixed to the inner wall of the transfer sleeve 17. The spacer ring 21 is rotatably connected to the outer wall of the drive box 5. An input pipe 18 and an output pipe 19 are inserted into the upper end of the transfer sleeve 17. The input pipe 18 and the output pipe 19 are respectively connected to the single-sided pipe 15 and the heat sink 13. The input pipe 18 and the output pipe 19 are located on both sides of the spacer ring 21. The rotation of the drive box 5 does not affect the position of the transfer sleeve 17, so the input pipe 18 and the output pipe 19 can be stably installed.

[0035] A pumping box 22 is fixed to the inner wall of the drive box 5. The pumping box 22 is connected to the transfer sleeve 17 through the inlet pipe 23 and the extrusion pipe 24. The inlet pipe 23 and the extrusion pipe 24 are located on both sides of the partition ring 21. A one-way valve is provided inside the inlet pipe 23 and the extrusion pipe 24. A piston plate 25 is slidably connected to the inner wall of the pumping box 22. A connecting rod 26 is fixed to the side wall of the piston plate 25. The connecting rod 26 passes through the pumping box 22 and is fixed to the top plate 27. A piston spring 28 is fixed together with the inner wall of the pumping box 22. The end face of the top plate 27 is arc-shaped and abuts against the drive plate 6. The rotation of the drive plate 6 will push the top plate 27 to move.

[0036] When the drive plate 6 and the drive box 5 rotate relative to each other, that is, the blades at that end do not work, and the output shaft of the motor 4 rotates for its own cooling, without affecting the effective drive of the wind. The drive plate 6 will intermittently contact the top plate 27, and then, under the elastic force of the piston spring 28, drive the piston plate 25 to reciprocate, so that the water inside the input pipe 18 can smoothly enter the output pipe 19, thereby completing the delivery of coolant. The coolant in the heat sink 13 can have a large contact area with the external environment, thus achieving self-heating. In addition, the coolant has a certain amount and the circulation time is relatively long, so it can meet the self-heating requirements.

[0037] A solenoid valve is installed in the input pipe 18 and controlled by the controller 12. When water cooling is required, the valve is closed. After the top plate 27 is pushed, the piston plate 25 moves, and the coolant inside the pump box 22 is pushed out. During the subsequent recovery, the spring force of the piston spring 28 is required. However, the input pipe 18 is closed, so the spring force of the piston spring 28 is insufficient to overcome the pressure difference. As a result, the piston plate 25 cannot be reset, so that the top plate 27 no longer contacts and collides with each other during the subsequent rotation of the plate 6, thereby reducing operating losses, reducing the load on the motor 4, and making the whole system more energy-efficient.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-temperature self-protected fan for an air ventilation unit in a production workshop, comprising a casing (1), characterized in that, The bottom of the housing (1) is fixed with a base (2), the bottom of the housing (1) is fixed with a base (3), the upper end of the base (3) is fixed with a motor (4), the motor (4) is a double-headed motor and both output shafts are connected to an air supply mechanism, the air supply mechanism includes a drive box (5) that is sealed and rotatably connected to the output shaft of the motor (4), the side wall of the drive box (5) is fixed with an installation head (7), the side wall of the installation head (7) is fixed with multiple sets of centrifugal blades, the side wall of the output shaft of the motor (4) is fixed with a drive plate (6), the inside of the drive box (5) is filled with electrorheological fluid, the electrorheological fluid wraps the drive plate (6), the bottom of the housing (1) is installed with a controller (12), the controller (12) is used to control the alternating power supply of the two sets of electrorheological fluids; A heat sink (13) is fixed to the outer wall of the housing (1). A distribution pipe (14) and two sets of single-sided pipes (15) are fixed to the side wall of the motor (4). The distribution pipe (14) and the single-sided pipes (15) are connected through a transfer pipe (16). The distribution pipe (14) and the heat sink (13) are connected through a central pipe (20). The single-sided pipes (15) and the heat sink (13) are connected through an alternating drive mechanism. A sensor (11) is fixed to the side wall of the motor (4). The sensor (11) is used to sense the temperature of the motor (4) and transmit the signal to the controller (12). The alternating drive mechanism includes a transfer sleeve (17) that is rotatably and sealed to the outer wall of the drive box (5). The inner wall of the transfer sleeve (17) is fixed with a spacer ring (21). The spacer ring (21) is rotatably and sealed to the outer wall of the drive box (5). An input pipe (18) and an output pipe (19) are inserted into the upper end of the transfer sleeve (17). The input pipe (18) and the output pipe (19) are respectively connected to the single-sided pipe (15) and the heat sink (13). The input pipe (18) and the output pipe (19) are respectively located on both sides of the spacer ring (21).

2. The high-temperature self-protection fan for an air ventilation unit in a production workshop according to claim 1, characterized in that, The centrifugal blade includes a base sleeve (8), which is fixed on the side wall of the mounting head (7). The inner wall of the base sleeve (8) is slidably connected with a telescopic blade plate (10), and the telescopic blade plate (10) and the bottom of the base sleeve (8) are both fixed with a centrifugal spring (9).

3. The high-temperature self-protection fan for an air ventilation unit in a production workshop according to claim 1, characterized in that, The inner wall of the drive box (5) is fixed with a pump box (22). The pump box (22) is connected to the transfer sleeve (17) through the inlet pipe (23) and the extrusion pipe (24). The inlet pipe (23) and the extrusion pipe (24) are located on both sides of the partition ring (21). The inlet pipe (23) and the extrusion pipe (24) are both equipped with one-way valves.

4. A high-temperature self-protecting fan for an air ventilation unit in a production workshop according to claim 3, characterized in that, The inner wall of the pump box (22) is sealed and slidably connected with a piston plate (25). A connecting rod (26) is fixed to the side wall of the piston plate (25). The connecting rod (26) passes through the pump box (22) and is fixed with a top plate (27). A piston spring (28) is fixed together with the inner wall of the pump box (22). The end face of the top plate (27) is an arc surface and abuts against the driving plate (6).

Images