A mine explosion-proof three-phase permanent magnet synchronous roller

Abstract

The application relates to the technical field of permanent magnet synchronous rollers, and discloses a mine explosion-proof three-phase permanent magnet synchronous roller, which comprises a support, a main shaft is fixedly arranged at the top of the support, a cylinder is rotatably sleeved with the main shaft, a rotor assembly is fixedly arranged at the inner side of the cylinder, and a stator assembly is fixedly sleeved with the main shaft. The adjusting plate drives the adjusting rod to make the driving plate rotate synchronously with the cylinder, the adjusting groove on the fixed plate changes the rotating track of the adjusting rod, when the adjusting rod rotates to the set position area, the adjusting groove drives the adjusting rod to move away from the cylinder while making the adjusting rod reciprocate, the transmission drives the driving plate to open the wrapping of the cylinder and increase the spacing with the rotor assembly, the mine material is shaken off under the condition that the adsorption of the permanent magnet on the magnetic mine material is reduced, the transmission connection efficiency of the driving plate with the conveying belt is ensured when the driving plate is reset, and the mine dust is prevented from being adsorbed and accumulated into layers to affect the heat dissipation of the rotor assembly.

Description

Technical Field

[0001] The present application relates to the technical field of permanent magnet synchronous rollers, and in particular to a flameproof three-phase permanent magnet synchronous roller for mining. Background Art

[0002] A permanent magnet synchronous roller is a drive device that integrates a permanent magnet synchronous motor with a conveyor roller. It is commonly used in mines as the drive roller in conveyors. Existing permanent magnet synchronous rollers include a roller shell and a bracket. The bracket is fixed with a main shaft. The roller shell is rotatably mounted on the outside of the main shaft via bearings. The main shaft is fixed and does not rotate. A stator assembly is fixed to the outside of the main shaft. The stator assembly is electrically connected to the electronic control equipment through a through-hole reserved in the main shaft. A rotor assembly is installed on the inside of the shell. The rotor assembly is composed of several permanent magnets. The magnetic field generated by the stator assembly when power is applied to the stator assembly drives the rotor assembly to rotate the roller shell. A coating layer is provided on the outside of the roller shell. The coating layer is usually made of rubber and is used to connect to the belt drive of the mining conveyor.

[0003] However, during the use of the existing permanent magnet synchronous drum in a mining environment, magnetic ore fragments or ore powder in the ore material will be adsorbed to the surface of the coating layer under the action of the permanent magnet inside the drum. On the one hand, it is easy to affect the transmission efficiency between the permanent magnet synchronous drum and the belt, resulting in increased energy consumption. On the other hand, the permanent magnet in the permanent magnet synchronous drum used in mining rotates relative to the stator, and in order to ensure the explosion-proof performance, heat is usually dissipated only through the drum shell. The adsorbed magnetic ore powder or debris is likely to form an additional coating surface, affecting the heat dissipation of the permanent magnet, and there is a possibility of overheating of the permanent magnet, resulting in permanent demagnetization of the permanent magnet, which shortens the service life of the permanent magnet synchronous drum. Summary of the Invention

[0004] The present application proposes a flameproof three-phase permanent magnet synchronous drum for mining, which has the advantages of facilitating the separation of magnetic mineral powder and debris from the drum surface and facilitating the heat dissipation of the permanent magnets. It is used to solve the problem that magnetic mineral debris and dust are easily adsorbed by the stator assembly to the drum surface, affecting the transmission performance and heat dissipation of the belt.

[0005] To achieve the above-mentioned object, the present application adopts the following technical solution: a flameproof three-phase permanent magnet synchronous drum for mining, comprising a bracket, a main shaft fixedly provided on the top of the bracket, a cylinder body rotatably sleeved on the main shaft, a rotor assembly fixedly provided on the inner side of the cylinder body, a stator assembly fixedly sleeved on the main shaft, a plurality of drive plates movably provided on the outer side of the cylinder body, the plurality of drive plates forming a circular ring adapted to the outer wall of the cylinder body, and adjustment rods fixedly connected on both sides of the drive plates;

[0006] Adjustment mechanisms are provided on both sides of the cylinder, which can drive the driving plate to rotate synchronously with the cylinder, and the adjustment mechanism can drive the adjustment rod at the set position to move in the radial direction of the cylinder. The transmission drives the driving plate to move away from the cylinder and drives the driving plate to shake, and then drives the driving plate to reset.

[0007] Furthermore, the adjustment mechanism includes two guide plates, which are fixedly sleeved with the cylinder, and the plate body of the guide plate is provided with a plurality of guide grooves, and the rod body of the adjustment rod is slidingly sleeved with the corresponding guide grooves. Both ends of the main shaft body are fixedly sleeved with fixed plates, and one side of the fixed plate is provided with an adjustment groove for changing the radial position of the adjustment rod, and the adjustment rod is slidingly sleeved with the corresponding adjustment groove.

[0008] Furthermore, the guide groove is a straight groove extending in the radial direction of the cylinder, an arc-shaped arc portion is provided on one side of the adjustment groove, and a curved portion is provided on the other side of the adjustment groove in which the distance from the groove body to the axis changes, and the distance from the groove body of the curved portion of the adjustment groove to the axis of the main shaft changes reciprocatingly.

[0009] Furthermore, a number of fixed seats are provided on both sides of the cylinder, and the number of the fixed seats is adapted to the number of the adjusting rods. A transmission gear is rotatably provided at the bottom of the fixed seat, and a No. 2 rack is slidably provided on one side of the fixed seat. One end of the adjusting rod body is fixedly connected to the No. 1 rack, and the No. 1 rack and the No. 2 rack are both engaged with the corresponding transmission gears, and one end of the No. 2 rack is fixedly connected to a counterweight block.

[0010] Furthermore, a number of blowing mechanisms are provided on both sides of the inner wall of the cylinder, the number of which matches the number of driving plates, a number of heat dissipation cavities are opened in the arc-shaped cylinder of the cylinder, and a number of exhaust holes are opened on the outer wall of the cylinder. The exhaust holes are connected to the corresponding heat dissipation cavities, and the blowing mechanism is used to blow air to form an airflow flowing through the heat dissipation cavity and the exhaust holes.

[0011] Furthermore, the blowing mechanism includes a fixed cylinder, the fixed cylinder is fixedly connected to the cylinder body, a sliding plug is slidably provided on the inner side of the fixed cylinder, a sliding rod is fixedly connected to one side of the sliding plug, a return spring is movably provided on the inner side of the fixed cylinder, and a connecting pipe is fixedly connected to the fixed sleeve of the sliding plug;

[0012] One side of the fixed cylinder is fixedly connected to an exhaust pipe, which is used to connect the cavity of the fixed cylinder and the heat dissipation cavity. One side of the fixed cylinder is fixedly connected to a ventilation pipe. The tube bodies of the connecting pipe and the exhaust pipe are fixedly provided with a one-way valve. One side of the sliding rod is fixedly connected to a moving rod, and one side of the fixed seat is slidably provided with a No. 3 rack.

[0013] Furthermore, one of the two one-way valves is used to allow gas to pass through the connecting pipe in one direction into the inner cavity corresponding to the fixed cylinder and the exhaust pipe, and the other one of the two one-way valves is used to allow gas to pass through the exhaust pipe in one direction into the heat dissipation cavity.

[0014] Furthermore, the third rack is meshed with the corresponding transmission gear, and the first rack can cooperate with the transmission gear to drive the third rack to move closer to the cylinder in the axial direction of the cylinder when moving radially away from the cylinder.

[0015] Furthermore, a collecting box is fixedly provided at a bottom position of the bracket, a filter is fixedly provided on one side of the ventilation pipe, and scrapers are fixedly connected to both sides of the main shaft.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present application provides a flameproof three-phase permanent magnet synchronous roller for mining, which drives the driving plate and the cylinder to rotate synchronously through the guide plate and the adjusting rod, while the adjusting rod slides along the adjusting groove to adjust the rotation trajectory of the adjusting rod. When the adjusting rod slides to the curved area, the inner walls of the adjusting grooves on both sides drive the relatively moving adjusting rods to cooperate with the guide grooves to move in the radial direction, thereby driving the driving plate to open at the set position. When the driving plate is disengaged from the position for connection with the conveyor belt, the driving plate is driven to move away from the cylinder, increasing the distance between the rotor assembly and the driving plate, thereby weakening the rotor assembly's attraction to magnetic mineral debris and dust and cooperating with the radial shaking of the driving plate to shake off the debris, thereby ensuring the transmission efficiency of the permanent magnet synchronous roller when it is connected to the conveyor belt, and preventing the mineral dust from being adsorbed on the surface of the driving plate to form an accumulation layer that affects the heat dissipation of the rotor assembly.

[0018] The present application provides a flameproof three-phase permanent magnet synchronous drum for mining. When the driving plate moves away from the drum and opens, an air blowing assembly generates airflow through the heat dissipation grooves and heat dissipation holes, thereby removing the coating layer and taking away the heat conducted to the drum by the rotor assembly. While ensuring the flameproof performance of the permanent magnet synchronous drum, the heat dissipation efficiency of the rotor assembly is further improved, thereby avoiding the phenomenon of permanent demagnetization of the permanent magnets in the rotor assembly at high temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work.

[0020] Figure 1 This is a schematic diagram of the overall structure of this application;

[0021] Figure 2 This is a structural diagram of the cylinder of this application;

[0022] Figure 3 This is a schematic diagram of the inner structure of the cylinder of this application;

[0023] Figure 4 This is a schematic cross-sectional diagram of the structure of the blowing mechanism of this application;

[0024] Figure 5 This is a schematic diagram of the stator assembly structure of this application;

[0025] Figure 6 This is a structural diagram of the transmission gear of this application;

[0026] Figure 7 This is a structural diagram of the adjustment plate for this application.

[0027] In the figure: 1- bracket, 2- main shaft, 3- cylinder, 4- stator assembly, 5- rotor assembly, 6- drive plate, 7- blowing mechanism, 701- fixed cylinder, 702- sliding plug, 703- sliding rod, 704- ventilation pipe, 705- exhaust pipe, 706- connecting pipe, 707- return spring, 8- fixed plate, 9- adjusting groove, 10- guide plate, 11- guide groove, 12- adjusting rod, 13- fixed seat, 14- No. 1 rack, 15- No. 2 rack, 16- transmission gear, 17- counterweight block, 18- No. 3 rack, 19- moving rod, 20- filter, 21- scraper, 22- heat dissipation chamber, 23- exhaust hole, 24- collection box. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1, as Figure 1-Figure 7 A flameproof three-phase permanent magnet synchronous drum for mining, comprising a bracket 1, a main shaft 2 fixedly arranged on the top of the bracket 1, a cylinder 3 rotatably sleeved on the outside of the main shaft 2 through a bearing, and a rotor assembly 5 fixedly arranged on the inside of the cylinder 3, see Figure 5A stator assembly 4 is fixedly sleeved on the middle position of the main shaft 2, and the stator assembly 4 is connected to the circuit. The stator assembly 4 cooperates with the rotor assembly 5 to drive the cylinder 3 to rotate relative to the main shaft 2. Several drive plates 6 are movably provided on the outside of the cylinder 3. The several drive plates 6 are arc-shaped plates and form a circular ring that is compatible with the outer wall of the cylinder 3. A coating layer is provided on the outside of the drive plate 6 for connecting to the conveyor belt drive, and the coating layer can be set to rubber.

[0030] Both sides of the driving plate 6 are fixedly connected with an adjusting rod 12 for driving the driving plate 6 to move. Both sides of the outer wall of the cylinder 3 are fixedly sleeved with a guide plate 10. The plate body of the guide plate 10 is provided with a plurality of guide grooves 11. The guide grooves 11 are straight grooves extending in the radial direction of the cylinder 3 and the number and size of the guide grooves 11 are adapted to the number and rod diameter of the adjusting rods 12. The rod body of the adjusting rod 12 is slidably sleeved with the corresponding guide groove 11. Both ends of the main shaft 2 are fixedly sleeved with a fixing plate 8. One side of the fixing plate 8 is provided with an adjusting groove 9 for changing the radial position of the adjusting rod 12. The adjusting grooves 9 are connected end to end. The adjusting rod 12 is slidably sleeved with the corresponding adjusting groove 9. A collection box 24 is fixedly provided at the bottom position of the bracket 1. Figure 7 One side of the adjustment groove 9 is provided with an arc-shaped portion, and the other side of the adjustment groove 9 is provided with a curved portion in which the distance from the groove body to the axis changes.

[0031] The driving plate 6 that rotates to correspond to the arc-shaped portion of the adjusting groove 9 is used to transmit and drive the conveyor belt to move, and the driving plate 6 that rotates to correspond to the curved portion is out of contact with the conveyor belt. When in use, the stator assembly 4 drives the rotor assembly 5 to rotate, and the rotor assembly 5 drives the cylinder 3 to rotate, and the cylinder 3 drives the guide plate 10 to rotate. The inner wall of the guide groove 11 drives the adjusting rod 12 to rotate around the axis of the main shaft 2, and the adjusting rod 12 drives the corresponding driving plate 6 to rotate. The driving plate 6 rotates from the corresponding position of the arc-shaped portion of the adjusting groove 9 to the position corresponding to the curved portion of the adjusting groove 9. At this time, the corresponding driving plate 6 is out of the transmission connection with the conveyor belt, and the driving plate 6 that rotates cyclically to the corresponding position of the arc-shaped portion of the adjusting groove 9 is re-connected to the conveyor belt transmission.

[0032] During the rotation of the adjusting rod 12, the rod body slides along the adjusting groove 9, and the inner wall of the curved part of the adjusting groove 9 drives the adjusting rod 12 to move, and cooperates with the guiding effect of the guide groove 11 to make the two adjusting rods 12 corresponding to the driving plate 6 move away from the center of the cylinder 3 in the radial direction of the cylinder 3, thereby driving the driving plate 6 to move radially away from the outer wall of the cylinder 3, increasing the distance between the outer wall of the driving plate 6 and the rotor assembly 5, so that the magnetic mineral debris on the outer wall of the driving plate 6 can be more easily separated from the surface of the driving plate 6, reducing the possibility of mineral powder and debris accumulation on the surface of the driving plate 6, thereby ensuring the transmission efficiency of the driving plate 6 and the conveyor belt, and ensuring the heat dissipation performance of the cylinder 3 and the driving plate 6, ensuring a good operating environment for the rotor assembly 5, and reducing the possibility of overheating and demagnetization of the rotor assembly 5.

[0033] Several fixed seats 13 are provided on both sides of the cylinder 3. The number of fixed seats 13 matches the number of adjusting rods 12. A transmission gear 16 is rotatably provided at the bottom of the fixed seat 13. A second rack 15 is slidably provided on one side of the fixed seat 13. The second rack 15 can slide relative to the fixed seat 13 along the radial direction of the cylinder 3. One end of the rod body of the adjusting rod 12 is fixedly connected to the first rack 14. The first rack 14 and the second rack 15 are meshed with the corresponding transmission gear 16. The first rack 14 is used to cooperate with the transmission gear 16 to drive the second rack 15 to move in the opposite direction. One end of the second rack 15 is fixedly connected to a counterweight block 17, see Figure 7 The distance between the groove body of the curved portion of the adjusting groove 9 and the axis of the main shaft 2 changes back and forth to form a wave shape.

[0034] When the adjusting rod 12 moves radially relative to the cylinder 3, the adjusting rod 12 drives the No. 1 rack 14 to move, and the No. 1 rack 14 drives the transmission gear 16 to rotate. The transmission gear 16 drives the No. 2 rack 15 to move in the opposite direction of the No. 1 rack 14, and the No. 2 rack 15 drives the counterweight 17 to move, and the counterweights 17 on both sides of the drive plate 6 cooperate to move, keeping the mass balance of the moving part of the cylinder 3 corresponding to the drive plate 6, ensuring the stability of the rotation of the permanent magnet synchronous drum. When the adjusting rod 12 moves to the curved part of the adjusting groove 9, the inner wall of the adjusting groove 9 drives the relatively moving adjusting rod 12 to move radially away from the cylinder 3 as a whole, while driving the adjusting rod 12 to reciprocate radially. When the distance between the drive plate 6 and the rotor assembly 5 increases, the drive plate 6 is driven to shake, shake off the mineral debris on the surface, further improve the efficiency of the separation of the mineral debris, and the mineral debris falls into the collection box 24 for collection.

[0035] Example 2, as Figures 1-6 On the basis of the first embodiment, a plurality of blowing mechanisms 7 are provided on both sides of the inner wall of the cylinder 3. The number of the blowing mechanisms 7 matches the number of the driving plates 6 and is used to blow air to the cylinder 3 at the corresponding position of the cylinder 3 to dissipate heat when the driving plates 6 are opened. Figure 4The blowing mechanism 7 includes a fixed cylinder 701, which is fixedly arranged on the side wall of the cylinder 3. A sliding plug 702 is slidingly arranged on the inner side of the fixed cylinder 701. A sliding rod 703 is fixedly connected to the midpoint of one side of the sliding plug 702. The sliding rod 703 can slide axially relative to the fixed cylinder 701. A return spring 707 is movably arranged on the inner side of the fixed cylinder 701. The return spring 707 is used to drive the sliding plug 702 to move toward the inner wall of the cylinder 3. The sliding plug 702 is fixedly sleeved with a connecting pipe 706.

[0036] The sliding plug 702 is used to separate the cavity of the fixed cylinder 701, and the connecting pipe 706 connects the cavities on both sides of the sliding plug 702. A number of heat dissipation cavities 22 are opened in the arc-shaped cylinder 3 of the cylinder 3. The number and position of the heat dissipation cavities 22 are adapted to the number and position of the driving plate 6. A number of exhaust holes 23 are opened on the outer wall of the cylinder 3, and the exhaust holes 23 are connected to the corresponding heat dissipation cavities 22. An exhaust pipe 705 is fixedly connected to one side of the fixed cylinder 701. The exhaust pipe 705 is used to connect the cavity of the fixed cylinder 701 with the heat dissipation cavity 22. A ventilation pipe 704 is fixedly connected to one side of the fixed cylinder 701. The exhaust pipe 705 and the ventilation pipe 704 are respectively located on both sides of the sliding plug 702. The pipe bodies of the connecting pipe 706 and the exhaust pipe 705 are fixedly provided with a one-way valve.

[0037] One of the two one-way valves is used to allow gas to pass through the connecting pipe 706 in one direction into the inner cavity corresponding to the fixed cylinder 701 and the exhaust pipe 705. The other one-way valve is used to allow gas to pass through the exhaust pipe 705 in one direction into the heat dissipation cavity 22. A moving rod 19 is fixedly connected to one side of the sliding rod 703, and a No. 3 rack 18 is slidably provided on one side of the fixed seat 13. The No. 3 rack 18 and the corresponding transmission gear 16 are engaged with each other. The No. 1 rack 14 can cooperate with the transmission gear 16 to drive the No. 3 rack 18 to move closer to the cylinder 3 in the axial direction of the cylinder 3 when it moves radially away from the cylinder 3. The position of the No. 3 rack 18 corresponds to the position of the moving rod 19.

[0038] When the adjusting rod 12 moves away from the cylinder 3, the adjusting rod 12 moves to drive the transmission gear 16 to rotate, and the transmission gear 16 drives the No. 3 rack 18 to move axially. The No. 3 rack 18 moves to press against the corresponding moving rod 19, driving the moving rod 19 to move close to the side wall of the cylinder 3, and the moving rod 19 drives the sliding rod 703 to retract into the fixed cylinder 701. The movement of the sliding rod 703 drives the sliding plug 702 to move. The sliding plug 702 allows the gas in the cavity on one side of the fixed cylinder 701 to enter the heat dissipation cavity 22 in one direction through the exhaust pipe 705 and the corresponding one-way valve. When the corresponding drive plate 6 is in the open state away from the cylinder 3, the gas passes through the heat dissipation cavity 22 and is discharged from the exhaust hole 23. When the outer wall of the cylinder 3 is in an uncovered state, the cylinder 3 is cooled, thereby cooling the rotor assembly 5 and improving the heat dissipation efficiency. At the same time, the gas blows away the dust near the surface of the cylinder 3 to avoid possible dust adhesion, further improving the reliability of the permanent magnet synchronous drum.

[0039] When the sliding plug 702 compresses the gas, the gas outside the cylinder 3 enters the cavity on one side of the fixed cylinder 701 through the ventilation pipe 704. When the return spring 707 drives the sliding plug 702 to reset, the gas enters the cavity of the fixed cylinder 701 on the side corresponding to the return spring 707 through the connecting pipe 706 in one direction. Figure 6 A filter 20 is fixedly provided on one side of the ventilation pipe 704. The filter 20 is configured as a filter screen for filtering dust. Scrapers 21 are fixedly connected on both sides of the main shaft 2. The distance between the ventilation pipe 704 and the axis of the main shaft 2 is smaller than the fixed seat 13. The position of the scraper 21 can fit with the filter 20. When the ventilation pipe 704 moves to the position corresponding to the scraper 21, the scraper 21 scrapes off the dust on the surface of the ventilation pipe 704, reducing the frequency of maintenance of the filter 20.

[0040] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flameproof three-phase permanent magnet synchronous drum for mining, comprising a bracket (1), a main shaft (2) fixedly arranged on the top of the bracket (1), a cylinder (3) rotatably sleeved on the main shaft (2), a rotor assembly (5) fixedly arranged on the inner side of the cylinder (3), and a stator assembly (4) fixedly sleeved on the main shaft (2), characterized in that: A plurality of drive plates (6) are movably provided on the outer side of the cylinder (3), and the plurality of drive plates (6) form a circular ring adapted to the outer wall of the cylinder (3). Adjustment rods (12) are fixedly connected to both sides of the drive plates (6); Adjustment mechanisms are provided on both sides of the cylinder (3), and the adjustment mechanisms can drive the drive plate (6) to rotate synchronously with the cylinder (3), and the adjustment mechanisms can drive the adjustment rod (12) at a set position to move in the radial direction of the cylinder (3), drive the drive plate (6) to move away from the cylinder (3) and drive the drive plate (6) to vibrate, and then drive the drive plate (6) to reset; The adjustment mechanism comprises two guide plates (10), the guide plates (10) are fixedly sleeved with the cylinder (3), the plate body of the guide plates (10) is provided with a plurality of guide grooves (11), the rod body of the adjustment rod (12) is slidably sleeved with the corresponding guide grooves (11), both ends of the shaft body of the main shaft (2) are fixedly sleeved with fixed plates (8), one side of the fixed plate (8) is provided with an adjustment groove (9) for changing the radial position of the adjustment rod (12), and the adjustment rod (12) is slidably sleeved with the corresponding adjustment groove (9); The guide groove (11) is a straight groove extending in the radial direction of the cylinder (3); one side of the adjustment groove (9) is provided with an arc-shaped portion; the other side of the adjustment groove (9) is provided with a curved portion in which the distance between the groove body and the axis changes; the distance between the groove body of the curved portion of the adjustment groove (9) and the axis of the main shaft (2) changes reciprocatingly.

2. The flameproof three-phase permanent magnet synchronous drum for mining according to claim 1, characterized in that: A plurality of fixed seats (13) are provided on both sides of the cylinder (3), and the number of the fixed seats (13) matches the number of the adjusting rods (12). A transmission gear (16) is rotatably provided at the bottom of the fixed seat (13), and a second rack (15) is slidably provided on one side of the fixed seat (13). One end of the rod body of the adjusting rod (12) is fixedly connected to the first rack (14), and the first rack (14) and the second rack (15) are meshed with the corresponding transmission gear (16). One end of the second rack (15) is fixedly connected to a counterweight (17).

3. The flameproof three-phase permanent magnet synchronous drum for mining according to claim 2, characterized in that: A plurality of blowing mechanisms (7) whose number matches the number of the driving plates (6) are provided on both sides of the inner wall of the cylinder (3), a plurality of heat dissipation cavities (22) are provided in the arc-shaped cylinder (3) of the cylinder (3), a plurality of exhaust holes (23) are provided on the outer wall of the cylinder (3), the exhaust holes (23) are communicated with the corresponding heat dissipation cavities (22), and the blowing mechanisms (7) are used for blowing air to form an airflow flowing through the heat dissipation cavities (22) and the exhaust holes (23).

4. The flameproof three-phase permanent magnet synchronous drum for mining according to claim 3, characterized in that: The blowing mechanism (7) comprises a fixed cylinder (701), the fixed cylinder (701) being fixedly connected to the cylinder body (3), a sliding plug (702) being slidably provided on the inner side of the fixed cylinder (701), a sliding rod (703) being fixedly connected to one side of the sliding plug (702), a return spring (707) being movably provided on the inner side of the fixed cylinder (701), and a connecting pipe (706) being fixedly sleeved on the sliding plug (702); An exhaust pipe (705) is fixedly connected to one side of the fixed cylinder (701), and the exhaust pipe (705) is used to connect the cavity of the fixed cylinder (701) and the heat dissipation cavity (22). A ventilation pipe (704) is fixedly connected to one side of the fixed cylinder (701), and the pipe bodies of the connecting pipe (706) and the exhaust pipe (705) are both fixedly provided with a one-way valve. A moving rod (19) is fixedly connected to one side of the sliding rod (703), and a number three rack (18) is slidably provided on one side of the fixed seat (13).

5. The flameproof three-phase permanent magnet synchronous drum for mining according to claim 4, characterized in that: One of the two one-way valves is used to allow gas to pass through the connecting pipe (706) in one direction into the inner cavity corresponding to the fixed cylinder (701) and the exhaust pipe (705), and the other one-way valve is used to allow gas to pass through the exhaust pipe (705) in one direction into the heat dissipation cavity (22).

6. The flameproof three-phase permanent magnet synchronous drum for mining according to claim 4, characterized in that: The third rack (18) and the corresponding transmission gear (16) are meshed with each other, and the first rack (14) can cooperate with the transmission gear (16) to drive the third rack (18) to move closer to the cylinder (3) in the axial direction of the cylinder (3) when moving radially away from the cylinder (3).

7. The flameproof three-phase permanent magnet synchronous drum for mining according to claim 4, characterized in that: A collecting box (24) is fixedly provided at a bottom position of the bracket (1), a filter (20) is fixedly provided on one side of the ventilation pipe (704), and scrapers (21) are fixedly connected to both sides of the main shaft (2).

Images