A heat dissipation structure for explosion-proof motors

Abstract

The present invention provides an explosion-proof motor heat dissipation structure, which has good heat dissipation and reduces the risk of explosion. It includes a rotor and an explosion-proof shell, wherein the rotor is mounted on a rotating shaft, the explosion-proof shell is arranged outside the rotor, and the rotating shaft penetrates both ends of the explosion-proof shell, and is characterized in that: the rotating shaft is hollow and has a plurality of air outlets at the front end, and further includes a concave base, wherein two side plates of the base are respectively provided with through holes and grooves, the front end of the rotating shaft passes through the through holes, the rear end of the rotating shaft is connected to a sealing box through a bearing seal, a connection port is fixedly provided on the sealing box, the connection port is embedded and connected with the groove, and the groove is sealed and connected with a fan arranged outside the base through an air outlet duct.

Description

Technical Field

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

[0002] An explosion-proof motor is a motor that can be used in flammable and explosive places and does not generate sparks during operation. It is mainly used in coal mines, oil and gas, petrochemical and chemical industries, and is usually used to drive pumps, fans, compressors and other transmission machinery. Due to the special operating environment of explosion-proof motors, the inside of explosion-proof motors needs to be sealed, which leads to poor heat dissipation of explosion-proof motors. In addition, the heat generated by the motor working for a long time will cause the circuit in the junction box to age, which may cause the motor to explode, posing a safety hazard. Summary of the invention

[0003] In view of the problem that the internal heat dissipation of explosion-proof motors is poor, the present invention provides a heat dissipation structure of explosion-proof motors, which has good heat dissipation and reduces the risk of explosion.

[0004] The technical solution is as follows: an explosion-proof motor heat dissipation structure, which includes a rotor and an explosion-proof housing, wherein the rotor is sleeved on a rotating shaft, the explosion-proof housing is arranged outside the rotor, and the rotating shaft penetrates both ends of the explosion-proof housing, and is characterized in that:

[0005] It also includes a concave base, two side plates of the base are respectively provided with a through hole and a groove, the rotating shaft is a hollow structure, the front end of the rotating shaft is provided with an air outlet and the rear end is open, the front end of the rotating shaft passes through the through hole, the rear end of the rotating shaft is connected to one end of the sealing box, the other end of the sealing box is connected to the connecting port, the connecting port is embedded and connected with the groove on the base, and the rear end of the groove is connected to the fan arranged at the outer end of the base through an air outlet duct;

[0006] The rotating shaft is hollow and has an air outlet at the front end, and further comprises a concave base, two side plates of the base are respectively provided with through holes and grooves, the front end of the rotating shaft passes through the through hole, the rear end of the rotating shaft is sealed and connected to a sealing box through a bearing, a connecting port is fixedly provided on the sealing box, the connecting port is embedded and connected with the groove, and the rear end of the groove is sealed and connected to a fan arranged outside the base through an air outlet duct;

[0007] It is further characterized in that: a heat dissipation pipe is arranged around the inner wall of the explosion-proof housing, and a water inlet and a water outlet of the heat dissipation pipe are respectively arranged at the upper end of the explosion-proof housing;

[0008] Two parallel slide rails are arranged on the bottom plate of the base, and corresponding sliding blocks for sliding fit are arranged at the bottom of the explosion-proof housing;

[0009] A gear rail is provided between the two slide rails on the bottom plate of the base, a corresponding V-shaped plate connected by clamping is provided at the bottom of the explosion-proof housing, the V-shaped plate includes a fixed plate and a clamping plate connected by hinges, the fixed plate of the V-shaped plate is fixedly connected to the bottom of the explosion-proof housing, and a spring is provided between the clamping plate of the V-shaped plate and the explosion-proof housing;

[0010] A fan is sleeved on the rear end of the rotating shaft, a protective cover is provided on the outside of the fan, and the protective cover is fixedly connected to the end of the explosion-proof housing;

[0011] In the above structure of the present invention, a slider is provided at the bottom of the explosion-proof motor, and a sliding rail is provided on the base for sliding cooperation. The explosion-proof motor slides on the surface of the slide rail through the slider, which not only exposes the air outlet from the base cover, but also makes the connection port of the explosion-proof motor embedded in the groove of the base for connection. The V-shaped plate at the bottom of the explosion-proof motor is pressed and connected with the rack rail of the base to fix the explosion-proof motor. When the fan is turned on, the fan blows cold air into the interior from the rear end of the shaft through the air outlet duct via the sealing box, and discharges the heat generated by the rotor from the air outlet at the front end of the shaft to form an internal cooling channel; at the same time, a heat dissipation pipe is provided on the inner wall of the explosion-proof housing, and a cooling water source is connected to the water inlet. The cooling water that absorbs heat is then discharged from the water outlet, further cooling the interior of the explosion-proof motor housing to form an intermediate cooling channel; in addition, the rotation of the motor drives the fan at the rear end of the shaft to rotate, and the fan blows away the heat outside the explosion-proof motor housing to form an external cooling channel. Through the triple cooling method, the explosion-proof motor can dissipate heat efficiently and reduce the risk of explosion of the explosion-proof motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0013] Figure 2 This is a schematic diagram of the explosion-proof motor structure of the present invention;

[0014] Figure 3 This is a schematic diagram of the base structure of the present invention;

[0015] In the figure: 1. rotor; 2. base; 3. rotating shaft; 4. air outlet; 5. explosion-proof casing; 6. slider; 7. slide rail; 8. fan; 9. groove; 10. connection port; 11. sealing box; 12. protective cover; 13. water inlet; 14. bearing; 15. heat pipe; 16. water outlet; 17. spring; 18. V-shaped plate; 19. gear rail; 20. through hole; 21. fan; 22. air outlet duct. DETAILED DESCRIPTION

[0016] like Figures 1 to 3As shown, an explosion-proof motor heat dissipation structure includes a rotor 1, an explosion-proof housing 5 and a base 2. The rotor 1 is sleeved on a rotating shaft 3, and the explosion-proof housing 5 is arranged on the outside of the rotor 1. The rotating shaft 3 penetrates both ends of the explosion-proof housing 5. The rotating shaft 3 is a hollow structure. An air outlet 4 is arranged at the front end of the rotating shaft 3. A fan 21 is sleeved at the rear end of the rotating shaft 3. A protective cover 12 is arranged on the outside of the fan 21. The protective cover 12 is fixedly connected to the end of the explosion-proof housing 5.

[0017] It also includes a base 2, which is concave and includes a bottom plate and two side plates.

[0018] A through hole 20 corresponding to the front end of the rotating shaft 3 is provided on one side plate of the base 2, a groove 9 is provided on the other side plate of the base 2, a bearing 14 is provided at the rear end of the rotating shaft 3, the bearing 14 is connected to the sealing box 11, and a connecting port 10 is provided at the rear end of the sealing box 11, and the connecting port 10 can be engaged with the groove 9. A fan 8 is provided on the outside of the base 2, and the air outlet of the fan 8 is connected to the air outlet duct 22, and the air outlet duct 22 is sealed and connected to the groove 9, thereby forming a sealed duct from the air outlet duct 22 of the fan 8 to the rear end of the rotating shaft 3.

[0019] Two parallel slide rails 7 are provided on the bottom plate of the base 2, and a slider 6 slidably matched with the slide rails 7 is provided at the bottom of the explosion-proof housing 5. The explosion-proof motor can slide on the base 2. At the same time, a fixing mechanism is provided between the base 2 and the explosion-proof housing 5. The fixing mechanism is used to fix the position of the explosion-proof motor on the base. Specifically, a rack 19 is provided between the two parallel slide rails 7 on the base 2, and a V-shaped plate 18 engaged with the rack 19 is provided at the bottom of the explosion-proof housing 5. The V-shaped plate 18 includes a fixed plate and a clamping plate hingedly connected. The fixed plate is fixedly connected to the bottom of the explosion-proof housing 5, and a spring 17 is provided between the clamping plate and the bottom of the explosion-proof housing 5.

[0020] A heat dissipation pipe 15 is arranged on the inner wall surrounding the explosion-proof housing 5 , one end of the heat dissipation pipe 15 is connected to a water inlet 13 on the explosion-proof housing 5 , and the water inlet 13 is externally connected to a cooling water source, and the other end of the heat dissipation pipe 15 is connected to a water outlet 16 on the explosion-proof housing 5 , and the cooling water that absorbs heat is discharged from the water outlet 16 .

[0021] The working principle of the present invention is as follows:

[0022] After the motor runs for a period of time, the temperature of the motor rises. The explosion-proof motor is slid along the slide rail 7 on the base 2. When it slides to the appropriate position, the air outlet of the rotating shaft 3 leaks out from under the cover of the base 2. At the same time, the connection port 10 at the rear end of the sealing box 11 is engaged with the groove 9 on the base 2. The V-shaped plate 18 on the explosion-proof housing 5 is opened and engaged with the rack 19 on the base 2 to fix the explosion-proof motor. The fan 8 is turned on, and the cold air blown in by the fan 8 enters the rear end of the rotating shaft 3 through the sealing box 11 from the air outlet duct 22, and the heat generated by the rotor 1 is discharged from the air outlet 4 at the front end of the rotating shaft 3. The water inlet 13 on the explosion-proof housing 5 is connected to the cooling water source, and the cooling water flows along the heat dissipation pipe 15 arranged on the inner wall of the explosion-proof housing 5. The cooling water that absorbs heat is then discharged through the water outlet 16 on the explosion-proof housing 5, further reducing the temperature inside the explosion-proof housing 5. When not in use, the V-shaped plate 18 is pressed to disengage it from the rack 19, and the explosion-proof motor is reset, so that the base 2 covers the air outlet 4 to prevent the air outlet 4 from being blocked by impurities and affecting the heat dissipation effect.

[0023] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by anyone familiar with the technology within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An explosion-proof motor heat dissipation structure, comprising a rotor and an explosion-proof housing, wherein the rotor is sleeved on a rotating shaft, the explosion-proof housing is arranged outside the rotor, and the rotating shaft penetrates both ends of the explosion-proof housing, characterized in that: The rotating shaft is hollow and has a plurality of air outlet holes at the front end. It also includes a concave base. The two side plates of the base are respectively provided with through holes and grooves. The front end of the rotating shaft passes through the through holes. The rear end of the rotating shaft is sealed and connected to a sealing box through a bearing. A connection port is fixedly provided on the sealing box. The groove is sealed and connected to a fan arranged outside the base through an air outlet duct. The explosion-proof housing is provided with a heat dissipation pipe around the inner wall, one end of the heat dissipation pipe is connected to the water inlet on the explosion-proof housing, and the other end of the heat dissipation pipe is connected to the water outlet on the explosion-proof housing; Two parallel slide rails are arranged on the bottom plate of the base, and corresponding sliding blocks for sliding fit are arranged at the bottom of the explosion-proof housing; A gear rail is provided between the two slide rails on the bottom plate of the base, a corresponding V-shaped plate connected by clamping is provided at the bottom of the explosion-proof housing, the V-shaped plate includes a fixed plate and a clamping plate connected by hinges, the fixed plate of the V-shaped plate is fixedly connected to the bottom of the explosion-proof housing, and a spring is provided between the clamping plate of the V-shaped plate and the explosion-proof housing; When the explosion-proof motor is slid along the slide rail on the base to the first position, the air outlet of the rotating shaft leaks out from under the cover of the base, and at the same time, the connection port at the rear end of the sealing box is engaged with the groove on the base; When the explosion-proof motor is slid along the slide rail on the base to the second position, the base covers the air outlet and the connecting port is separated from the groove.

2. The explosion-proof motor heat dissipation structure according to claim 1, characterized in that: A fan is sleeved on the rear end of the rotating shaft, a protective cover is arranged on the outer side of the fan, and the protective cover is fixedly connected to the end of the explosion-proof housing.

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