Explosion-proof motor with cooling shaft structure

Abstract

The invention discloses an explosion-proof motor with a cooling shaft structure, and relates to the technical field of motors, the explosion-proof motor comprises a mounting bottom plate, the upper end surface of the mounting bottom plate is fixedly connected with an explosion-proof outer shell, the upper end of the interior of the explosion-proof outer shell is provided with an explosion-proof inner shell, the interior of the explosion-proof inner shell is provided with a stator assembly, and the interior of the explosion-proof inner shell is rotatably connected with a motor shaft. A rotor assembly is arranged at the position, located in the anti-explosion inner shell, of the motor shaft. The end, located in the explosion-proof shell, of the motor shaft is fixedly connected with an end shaft, the end, away from the motor shaft, of the end shaft is fixedly connected with a six-edge shaft, a heat exchange channel is formed in the motor shaft, and a communication channel is formed in the end shaft. According to the invention, through the arrangement of the connection joint, the cold shaft assembly, the heat exchange channel, the communication channel and the communication hole, the motor shaft and the interior of the explosion-proof inner shell can be cooled during working, so that internal cooling can be realized, and the conditions of overheating and thermal damage of the motor shaft are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of motors, in particular to an explosion-proof motor with a cooling shaft structure. Background Art

[0002] Explosion-proof motors are motors that can be used in flammable and explosive places and do not generate sparks during operation. Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, they are also widely used in textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, medicine and other sectors. As the main power equipment, explosion-proof motors are usually used to drive pumps, fans, compressors and other transmission machinery.

[0003] During the operation of the explosion-proof motor, the inside of the explosion-proof motor needs to be cooled to avoid overheating. For example, the prior art CN 117914058B proposes a special explosion-proof motor for the natural gas industry with a self-cooling function, including a motor housing and a housing end cover. The motor housing is provided with a stator, a rotor and a motor output shaft; a circulating cooling chamber is spirally opened in the motor housing, and the device cools the motor housing through the cooling chamber shell.

[0004] Although the above-mentioned explosion-proof motor can achieve the function of self-cooling by cooling the casing, during the operation of the motor, heat is generated inside and conducted to the casing. Although only the casing is dissipated, the problem of overheating of the casing can be solved, the heat inside the motor cannot be reduced quickly, resulting in overheating inside the motor, which in turn causes overheating of the motor shaft, and may seriously cause thermal damage to the motor shaft. In response to the above-mentioned problems, we provide an explosion-proof motor with a cooling shaft structure to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide an explosion-proof motor with a cooling shaft structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: An explosion-proof motor with a cooling shaft structure comprises a mounting base plate, an upper surface of the mounting base plate is fixedly connected to an explosion-proof outer shell, an upper end of the explosion-proof outer shell is provided with an explosion-proof inner shell, a stator assembly is provided inside the explosion-proof inner shell, a motor shaft is rotatably connected inside the explosion-proof inner shell, and a rotor assembly is provided at a position of the motor shaft inside the explosion-proof inner shell; The end of the motor shaft located inside the explosion-proof housing is fixedly connected to an end shaft, and the end of the end shaft away from the motor shaft is fixedly connected to a hexagonal shaft. A heat exchange channel is opened inside the motor shaft, and a connecting channel is opened inside the end shaft. The connecting channel runs through the motor shaft and is connected with the heat exchange channel. The ends of the heat exchange channel and the connecting channel are both provided with connecting holes. The motor shaft and the end shaft are both installed with connecting joints at the positions of the connecting holes. The lower end of the connecting joint on the motor shaft is connected to a return pipe, and one side of the connecting joint on the end shaft is connected to an infusion pipe. A cold shaft assembly for conveying cooling liquid into the connecting channel is provided inside the explosion-proof housing.

[0007] As a further solution of the present invention: the connecting joint includes an annular cover shell, bearings are provided at both ends of the annular cover shell, and sealing rings are provided inside the annular cover shell near the bearings.

[0008] As a further solution of the present invention: the cold shaft assembly includes a pump casing, which is arranged below the connecting joint; a cooling chamber is provided at the lower end of the explosion-proof casing, and the cooling chamber is filled with coolant; a suction pipe is connected to the water inlet of the pump casing, and the suction pipe and the liquid return pipe both extend into the cooling chamber; an output pipe is connected to the outlet end of the pump casing, and the output pipe is connected to the infusion pipe; an impeller is provided inside the pump casing, and a drive assembly for driving the impeller inside the pump casing is also provided inside the explosion-proof casing.

[0009] As a further solution of the present invention: the drive assembly includes a second conical friction roller, the second conical friction roller is fixedly connected to the end shaft, a fixed side plate is fixedly connected to one side of the interior of the explosion-proof housing, a drive shaft is rotatably connected to the fixed side plate, the drive shaft is fixedly connected to the impeller shaft inside the pump casing, a first conical friction roller is fixedly connected to the drive shaft, a friction circular belt for transmission is provided between the two first conical friction rollers, and an adjustment assembly for adjusting the position of the friction circular belt is provided on the hexagonal shaft.

[0010] As a further solution of the present invention: the adjustment component includes a fixed ring, the fixed ring is fixedly connected to the end of the hexagonal shaft away from the end shaft, the hexagonal shaft is slidably connected with a sliding ring, the sliding ring is rotatably connected with a second connecting rod, the fixed ring is rotatably connected with a first connecting rod, the second connecting rod and the first connecting rod are rotatably connected at one end opposite to the second connecting rod, the end of the second connecting rod is also fixedly connected with a counterweight, a spring is passed through the position of the hexagonal shaft between the sliding ring and the fixed ring, and the sliding ring is also provided with a pushing component for pushing the friction circular belt to move.

[0011] As a further solution of the present invention: the pushing assembly includes a rotating ring, which is rotatably connected in a ring groove on the surface of the sliding ring, and the lower end of the rotating ring is fixedly connected to an L-shaped support rod, which is slidably connected to the fixed side plate, and both sides of the L-shaped support rod at one end away from the rotating ring are rotatably connected to two limit rotating rods for limiting the friction circular belt.

[0012] As a further solution of the present invention: the explosion-proof inner shell is also provided with a cold shell component for further reducing the internal heat of the explosion-proof inner shell.

[0013] As a further solution of the present invention: the cold shell assembly includes a threaded flat tube, which is embedded in the surface of the explosion-proof inner shell, one end of the threaded flat tube is connected to a liquid inlet pipe, which is connected to the output pipe, and the other end of the threaded flat tube is connected to a liquid outlet pipe, the lower end of the liquid outlet pipe extends to the inside of the cooling chamber, and a solenoid valve is also provided on the liquid inlet pipe, and a limit switch is installed on the fixed side panel, and the limit switch is electrically connected to the solenoid valve.

[0014] As a further solution of the present invention: a refrigerator is installed on one side of the explosion-proof housing, the evaporator of the refrigerator is arranged inside the cooling cavity, and a temperature sensor is also arranged at the bottom of the cooling cavity.

[0015] As a further solution of the present invention: the annular cover and the pump casing are both provided with a support seat fixedly connected to the inner wall of the explosion-proof casing.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can cool the motor shaft and the inside of its explosion-proof inner shell during operation by providing a connecting joint, a cold shaft assembly, a heat exchange channel, a connecting channel and a connecting hole, thereby achieving internal cooling and avoiding overheating and thermal damage of the motor shaft.

[0017] 2. The present invention provides a threaded flat tube, a liquid outlet pipe and a liquid inlet pipe, which can dissipate heat and cool the explosion-proof inner shell during operation, and cooperate with the cooling of the motor shaft, thereby effectively avoiding overheating of the motor when running at high speed.

[0018] 3. The present invention can automatically adjust the impeller speed inside the pump casing according to the speed of the motor through the adjustment component during operation. When the motor runs at a low speed, the pump casing rotates to only provide coolant to the inside of the motor shaft. When the motor shaft runs at a high speed, the adjustment component will drive the L-shaped support rod to move toward the fixed side plate, changing the transmission ratio between the end shaft and the drive shaft, so that the impeller inside the pump casing can run at a high speed to increase the power. At the same time, the end of the L-shaped support rod will touch the limit switch to open the solenoid valve, and then supply liquid to the threaded flat tube and the inside of the motor shaft at the same time, thereby realizing simultaneous cooling of the casing and the motor shaft, thereby meeting the heat dissipation requirements of the motor under high-speed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure of the driving component in the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the regulating component in the present invention.

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the motor shaft in the present invention.

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting joint in the present invention.

[0025] Among them: 1. Installation base plate; 2. Explosion-proof housing; 3. Motor shaft; 4. Refrigerator; 5. Evaporator; 6. First conical friction roller; 7. Pump housing; 8. Connecting joint; 9. Cooling chamber; 10. Temperature sensor; 11. Communication channel; 12. Liquid outlet pipe; 13. Threaded flat pipe; 14. Explosion-proof inner housing; 15. Liquid return pipe; 16. Support seat; 17. Second conical friction roller; 18. Fixed side plate; 19. Suction pipe; 2 0. Counterweight; 21. First connecting rod; 22. Second connecting rod; 23. Friction belt; 25. Liquid inlet pipe; 26. Liquid infusion pipe; 27. Output pipe; 28. L-shaped support rod; 29. ​​Drive shaft; 30. End shaft; 31. Hexagonal shaft; 32. Fixed ring; 33. Spring; 34. Rotating ring; 35. Sliding ring; 36. Limit rotating rod; 37. Heat exchange channel; 38. Connecting hole; 39. Solenoid valve; 40. Limit switch.

[0026] 81. Annular cover; 82. Sealing ring; 83. Bearing. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 6In an embodiment of the present invention, an explosion-proof motor with a cooling shaft structure includes a mounting base plate 1, an explosion-proof housing 2 is fixedly connected to the upper end surface of the mounting base plate 1, an explosion-proof inner housing 14 is provided at the upper end inside the explosion-proof housing 2, a stator assembly is provided inside the explosion-proof inner housing 14, a motor shaft 3 is rotatably connected inside the explosion-proof inner housing 14, a rotor assembly is provided at a position of the motor shaft 3 located inside the explosion-proof inner housing 14, an end shaft 30 is fixedly connected to one end of the motor shaft 3 located inside the explosion-proof housing 2, an end of the end shaft 30 away from the motor shaft 3 is fixedly connected to a hexagonal shaft 31, a heat exchange channel 37 is provided inside the motor shaft 3, A connecting channel 11 is provided in the end shaft 30, and the connecting channel 11 passes through the motor shaft 3 and is connected with the heat exchange channel 37. The ends of the heat exchange channel 37 and the connecting channel 11 are both provided with connecting holes 38. When cooling the motor shaft 3, the coolant flows in from the connecting hole 38 at one end of the connecting channel 11, then enters the connecting channel 11, enters the heat exchange channel 37 through the connecting channel 11, and then is discharged from the connecting hole 38 at one end of the heat exchange channel 37. When the coolant flows through the connecting channel 11 and the heat exchange channel 37, the coolant exchanges heat with the motor shaft 3, thereby taking away the heat on the motor shaft 3, thereby cooling the motor shaft 3.

[0029] The motor shaft 3 and the end shaft 30 are both installed with connecting joints 8 at the positions of the connecting hole 38, and the connecting joint 8 includes an annular cover 81, and bearings 83 are provided at both ends of the annular cover 81. Sealing rings 82 are provided inside the annular cover 81 near the bearings 83. The lower end of the connecting joint 8 on the motor shaft 3 is connected to a return pipe 15, and one side of the connecting joint 8 on the end shaft 30 is connected to a liquid infusion pipe 26. A cold shaft assembly for conveying cooling liquid into the connecting channel 11 is provided inside the explosion-proof housing 2; the cooling liquid can be conveyed to the connecting joint 8 through the provided cold shaft assembly, and then conveyed to the inside of the connecting channel 11 through the connecting joint 8, the provided bearings 83 can ensure that the annular cover 81 does not rotate together with the end shaft 30, and the provided sealing ring 82 can be sealed to avoid leakage of cooling liquid.

[0030] The cold shaft assembly includes a pump casing 7, which is arranged below the connecting joint 8. A cooling chamber 9 is provided at the lower end of the explosion-proof housing 2, and the cooling chamber 9 is filled with coolant. A suction pipe 19 is connected to the water inlet of the pump casing 7, and the suction pipe 19 and the liquid return pipe 15 both extend into the cooling chamber 9. An output pipe 27 is connected to the outlet end of the pump casing 7, and the output pipe 27 is communicated with the infusion pipe 26. An impeller is provided inside the pump casing 7, and a driving assembly for driving the impeller inside the pump casing 7 is also provided inside the explosion-proof housing 2; a supporting seat 16 fixedly connected to the inner wall of the explosion-proof housing 2 is provided on the annular cover 81 and the pump casing 7; when working, the driving assembly drives the impeller inside the pump casing 7 to rotate, and the impeller inside the pump casing 7 rotates to pump the coolant inside the cooling chamber 9 from the suction pipe 19 to the output pipe 27, and then enters the infusion pipe 26, and then is transported to the connecting joint 8.

[0031] The driving assembly includes a second conical friction roller 17, which is fixedly connected to the end shaft 30. A fixed side plate 18 is fixedly connected to one side of the explosion-proof housing 2. A driving shaft 29 is rotatably connected to the fixed side plate 18. The driving shaft 29 is fixedly connected to the impeller shaft inside the pump housing 7. A first conical friction roller 6 is fixedly connected to the driving shaft 29. A friction circular belt 23 for transmission is provided between the two first conical friction rollers 6. An adjusting assembly for adjusting the position of the friction circular belt 23 is provided on the hexagonal shaft 31. The rotation of the motor shaft 3 drives the end shaft 30 to rotate, and the rotation of the end shaft 30 drives the second conical friction roller 17 to rotate. The rotation of the second conical friction roller 17 can drive the friction circular belt 23 to operate. The operation of the friction circular belt 23 can drive the first conical friction roller 6 to rotate. The rotation of the first conical friction roller 6 can drive the impeller inside the pump housing 7 to rotate. The provided adjusting assembly can automatically adjust the position of the second connecting rod 22 according to the rotation speed of the motor shaft 3 during operation.

[0032] The adjusting assembly includes a fixing ring 32, which is fixedly connected to one end of the hexagonal shaft 31 away from the end shaft 30, a sliding ring 35 is slidably connected to the hexagonal shaft 31, a second connecting rod 22 is rotatably connected to the sliding ring 35, a first connecting rod 21 is rotatably connected to the fixing ring 32, the second connecting rod 22 is rotatably connected to the opposite end of the first connecting rod 21, a counterweight 20 is also fixedly connected to the end of the second connecting rod 22, and a counterweight 20 is also fixedly connected to the end of the hexagonal shaft 31 between the sliding ring 35 and the fixing ring 32. The sliding ring 35 is provided with a pushing assembly for pushing the friction belt 23 to move; the pushing assembly includes a rotating ring 34, the rotating ring 34 is rotatably connected in the ring groove on the surface of the sliding ring 35, the lower end of the rotating ring 34 is fixedly connected with an L-shaped support rod 28, the L-shaped support rod 28 is slidably connected to the fixed side plate 18, and the two sides of the L-shaped support rod 28 away from the rotating ring 34 are rotatably connected with two limit rotating rods 36 for limiting the friction belt 23; when working, the end shaft 30 rotates The hexagonal shaft 31 is driven to rotate, and the rotation of the hexagonal shaft 31 drives the sliding ring 35 to rotate. The rotation of the sliding ring 35 drives the second connecting rod 22 to rotate. When the second connecting rod 22 rotates, the centrifugal force generated by the counterweight block 20 drives the second connecting rod 22 and the first connecting rod 21 to expand, so that the sliding ring 35 moves toward the fixed ring 32. When the speed of the hexagonal shaft 31 is faster, the centrifugal force generated by the counterweight block 20 is greater, and the corresponding sliding ring 35 overcomes the elastic force of the spring 33 and moves more toward the fixed ring 32. 5 will also drive the L-shaped support rod 28 to move, and the movement of the L-shaped support rod 28 can drive the limit rotating rod 36, and the limit rotating rod 36 drives the friction belt 23 to move horizontally, thereby realizing the change of the transmission ratio between the end shaft 30 and the driving shaft 29. When the speed of the motor shaft 3 is higher, the movement amplitude of the friction belt 23 toward the large end of the second conical friction roller 17 is larger, and the position of the friction belt 23 on the first conical friction roller 6 will move to the small end, thereby increasing the speed of the driving shaft 29 and the pumping speed of the impeller inside the pump housing 7.

[0033] The explosion-proof inner shell 14 is also provided with a cold shell component for further reducing the internal heat of the explosion-proof inner shell 14; the cold shell component includes a threaded flat tube 13, the threaded flat tube 13 is embedded in the surface of the explosion-proof inner shell 14, one end of the threaded flat tube 13 is connected to a liquid inlet pipe 25, the liquid inlet pipe 25 is communicated with the output pipe 27, the other end of the threaded flat tube 13 is connected to a liquid outlet pipe 12, the lower end of the liquid outlet pipe 12 extends to the inside of the cooling chamber 9, the liquid inlet pipe 25 is also provided with a solenoid valve 39, and a limit switch 40 is installed on the fixed side plate 18, and the limit switch 40 is electrically connected to the solenoid valve 39; when the motor runs at high speed, the end block of the L-shaped support rod 28 will touch the limit switch 40 to open the solenoid valve 39, and then simultaneously supply liquid to the threaded flat tube 13 and the motor shaft 3, so as to achieve simultaneous cooling of the outer shell and the motor shaft 3, thereby meeting the heat dissipation requirements of the motor under high-speed operation.

[0034] A refrigerator 4 is installed on one side of the explosion-proof housing 2, and the evaporator 5 of the refrigerator 4 is arranged inside the cooling chamber 9. A temperature sensor 10 is also provided at the bottom of the cooling chamber 9; the coolant inside the cooling chamber 9 can be cooled by the refrigerator 4 and the evaporator 5, and the temperature sensor 10 can detect the temperature of the coolant inside the cooling chamber 9. When the temperature exceeds the set value, the refrigerator 4 starts, and when it drops to the required temperature, the refrigerator 4 is turned off.

[0035] The working principle of the present invention is: during operation, the stator assembly and the rotor assembly inside the explosion-proof inner shell 14 cooperate to rotate the motor shaft 3. When the motor shaft 3 rotates, the rotation of the motor shaft 3 drives the end shaft 30 to rotate. The rotation of the end shaft 30 drives the second conical friction roller 17 to rotate. The rotation of the second conical friction roller 17 can drive the friction circular belt 23 to operate. The operation of the friction circular belt 23 can drive the first conical friction roller 6 to rotate. The rotation of the first conical friction roller 6 can drive the impeller inside the pump housing 7 to rotate. The impeller inside the pump housing 7 rotates. The rotation of the impeller inside the pump housing 7 pumps the coolant inside the cooling chamber 9 from the suction pipe 19 to the output pipe 27, and then enters the infusion pipe 26, and then is transported to the connecting joint 8. When cooling the motor shaft 3, the coolant flows in from the connecting hole 38 at one end of the connecting channel 11, and then enters the connecting channel 11, enters the heat exchange channel 37 through the connecting channel 11, and then from The connecting hole 38 at one end of the heat exchange channel 37 is discharged. When the coolant flows through the connecting channel 11 and the heat exchange channel 37, the coolant exchanges heat with the motor shaft 3, and then takes away the heat on the motor shaft 3 to achieve cooling of the motor shaft 3. The adjustment component can be set to automatically adjust the impeller speed inside the pump casing 7 according to the speed of the motor during operation. When the motor runs at a low speed, the pump casing 7 rotates to only provide coolant to the inside of the motor shaft 3. When the motor shaft 3 runs at a high speed, the adjustment component will drive the L-shaped support rod 28 to move toward the fixed side plate 18, change the transmission ratio between the end shaft 30 and the drive shaft 29, so that the impeller inside the pump casing 7 runs at a high speed to increase the power. At the same time, the end block of the L-shaped support rod 28 will touch the limit switch 40 to open the solenoid valve 39, and then simultaneously supply liquid to the threaded flat tube 13 and the inside of the motor shaft 3, so as to achieve simultaneous cooling of the casing and the motor shaft 3, thereby meeting the heat dissipation requirements of the motor under high-speed operation.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Although this specification is described in accordance with the implementation modes, not every implementation mode includes only one technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An explosion-proof motor with a cooling shaft structure, comprising a mounting base plate (1), an explosion-proof outer shell (2) being fixedly connected to the upper end surface of the mounting base plate (1), an explosion-proof inner shell (14) being provided at the upper end inside the explosion-proof outer shell (2), a stator assembly being provided inside the explosion-proof inner shell (14), a motor shaft (3) being rotatably connected inside the explosion-proof inner shell (14), and a rotor assembly being provided at a position of the motor shaft (3) inside the explosion-proof inner shell (14); It is characterized by: One end of the motor shaft (3) located inside the explosion-proof housing (2) is fixedly connected to an end shaft (30), and one end of the end shaft (30) away from the motor shaft (3) is fixedly connected to a hexagonal shaft (31); a heat exchange channel (37) is provided inside the motor shaft (3); a connecting channel (11) is provided inside the end shaft (30); the connecting channel (11) passes through the motor shaft (3) and is connected to the heat exchange channel (37); the ends of the heat exchange channel (37) and the connecting channel (11) are both provided with connecting holes (38); the motor shaft (3) and the end shaft (30) are both provided with connecting joints (8) at the positions of the connecting holes (38); the lower end of the connecting joint (8) on the motor shaft (3) is connected to a liquid return pipe (15); one side of the connecting joint (8) on the end shaft (30) is connected to a liquid infusion pipe (26); and a cold shaft component for conveying cooling liquid into the connecting channel (11) is provided inside the explosion-proof housing (2); The cold shaft assembly comprises a pump housing (7), wherein the pump housing (7) is arranged below the connecting joint (8), a cooling chamber (9) is arranged at the lower end of the explosion-proof housing (2), the cooling chamber (9) is filled with a coolant, a water inlet of the pump housing (7) is connected to a suction pipe (19), the suction pipe (19) and the liquid return pipe (15) both extend into the cooling chamber (9), an outlet end of the pump housing (7) is connected to an output pipe (27), the output pipe (27) is communicated with a liquid infusion pipe (26), an impeller is arranged inside the pump housing (7), and a drive assembly for driving the impeller inside the pump housing (7) is also arranged inside the explosion-proof housing (2); The driving assembly comprises a second conical friction roller (17), the second conical friction roller (17) being fixedly connected to the end shaft (30), a fixed side plate (18) being fixedly connected to one side of the interior of the explosion-proof housing (2), a driving shaft (29) being rotatably connected to the fixed side plate (18), the driving shaft (29) being fixedly connected to the impeller shaft inside the pump housing (7), a first conical friction roller (6) being fixedly connected to the driving shaft (29), a friction circular belt (23) for transmission being provided between the two first conical friction rollers (6), and an adjustment assembly for adjusting the position of the friction circular belt (23) being provided on the hexagonal shaft (31).

2. The explosion-proof motor with a cooling shaft structure according to claim 1, characterized in that: The connecting joint (8) comprises an annular cover (81), bearings (83) are provided at both ends of the annular cover (81), and sealing rings (82) are provided at positions inside the annular cover (81) close to the bearings (83).

3. The explosion-proof motor with a cooling shaft structure according to claim 1, characterized in that: The adjustment component comprises a fixed ring (32), the fixed ring (32) being fixedly connected to one end of the hexagonal shaft (31) away from the end shaft (30), the hexagonal shaft (31) being slidably connected to a sliding ring (35), the sliding ring (35) being rotatably connected to a second connecting rod (22), the fixed ring (32) being rotatably connected to a first connecting rod (21), the second connecting rod (22) and the first connecting rod (21) being rotatably connected at one end opposite to the second connecting rod (22), the end of the second connecting rod (22) being also fixedly connected to a counterweight (20), a spring (33) being inserted through a position of the hexagonal shaft (31) between the sliding ring (35) and the fixed ring (32), and the sliding ring (35) being also provided with a pushing component for pushing the friction circular belt (23) to move.

4. The explosion-proof motor with a cooling shaft structure according to claim 3, characterized in that: The pushing assembly comprises a rotating ring (34), the rotating ring (34) being rotatably connected in a ring groove on the surface of a sliding ring (35), an L-shaped support rod (28) being fixedly connected to the lower end of the rotating ring (34), the L-shaped support rod (28) being slidably connected to a fixed side plate (18), and two limiting rotating rods (36) for limiting the friction circular belt (23) being rotatably connected to both sides of one end of the L-shaped support rod (28) away from the rotating ring (34).

5. The explosion-proof motor with a cooling shaft structure according to claim 1, characterized in that: The explosion-proof inner shell (14) is also provided with a cold shell component for further reducing the internal heat of the explosion-proof inner shell (14).

6. The explosion-proof motor with a cooling shaft structure according to claim 5, characterized in that: The cold shell assembly comprises a threaded flat tube (13), the threaded flat tube (13) being embedded in the surface of the explosion-proof inner shell (14), one end of the threaded flat tube (13) being connected to a liquid inlet pipe (25), the liquid inlet pipe (25) being in communication with an outlet pipe (27), the other end of the threaded flat tube (13) being connected to a liquid outlet pipe (12), the lower end of the liquid outlet pipe (12) extending into the interior of the cooling chamber (9), the liquid inlet pipe (25) being further provided with a solenoid valve (39), the fixed side plate (18) being provided with a limit switch (40), the limit switch (40) being electrically connected to the solenoid valve (39).

7. The explosion-proof motor with a cooling shaft structure according to claim 1, characterized in that: A refrigerator (4) is installed on one side of the explosion-proof housing (2); an evaporator (5) of the refrigerator (4) is arranged inside a cooling chamber (9); and a temperature sensor (10) is also arranged at the bottom of the cooling chamber (9).

8. The explosion-proof motor with a cooling shaft structure according to claim 2, characterized in that: The annular cover (81) and the pump housing (7) are both provided with a support seat (16) fixedly connected to the inner wall of the explosion-proof housing (2).

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