CN216904522U - An explosion-proof motor casing with high heat dissipation efficiency - Google Patents

Abstract

The utility model discloses an explosion-proof motor shell with high heat dissipation efficiency, which is applied to the technical field of explosion-proof motor accessory equipment, and the technical scheme is as follows: an explosion-proof motor shell with high heat dissipation efficiency comprises an inner shell and an outer shell connected to the inner shell through a plurality of support sheets, wherein a support base is arranged at the bottom of the outer shell, air inlets are formed in two ends of the outer shell respectively, a heat dissipation fan with blades rotating in opposite directions is connected to a motor shaft between the outer shell and the inner shell and close to the air inlets, a plurality of heat dissipation strips are wound on a high-heating area of the inner shell along the circumferential direction, and a plurality of air outlets are formed in the outer shell close to the middle of the heat dissipation strips; has the technical effects that: the heat dissipation efficiency is high.

Description

An explosion-proof motor housing with high heat dissipation efficiency

technical field

The utility model relates to the technical field of explosion-proof motor accessories, in particular to an explosion-proof motor casing with high heat dissipation efficiency.

Background technique

Explosion-proof motor is a motor that can be used in flammable and explosive places without generating sparks during operation. It is widely used in coal mines, oil and gas and chemical industries. Explosion-proof motors mainly include flameproof motors, increased safety motors, and positive pressure motors. Explosive sparks, arcs or temperature etc.

At present, a Chinese utility model with an announcement number of CN214069722U discloses a motor housing with a heat dissipation function. The outer wall of the base of the utility model is provided with a heat sink, and the end of the base is provided with a hood connected with the heat sink. A cooling fan is arranged inside the cover, a drainage tube is arranged on the periphery of the base, and the drainage tube is connected with the cooling fins to form a plurality of cooling air ducts.

The utility model is mainly based on forming several air ducts between the drainage tube and the heat sink and using a cooling fan to cool the air hood connected to the heat sink, but the utility model will bring the heat of the high heat generation area to the low heat during the cooling process. This indirectly causes the heat in the low heat generation area to increase. Because the important sensors of the motor and other precision parts are usually placed in the low heat generation area and the precision parts usually cannot withstand high temperature, if the temperature of the low heat generation area cannot be lowered in time, it may lead to The precision parts are damaged and thus affect the operation of the motor, and there is room for improvement.

Utility model content

The purpose of the utility model is to provide an explosion-proof motor casing with high heat dissipation efficiency, which has the advantage of high heat dissipation efficiency.

The above technical purpose of the present invention is achieved through the following technical solutions: an explosion-proof motor casing with high heat dissipation efficiency, comprising an inner casing and an outer casing connected to the inner casing through a plurality of supporting sheets, the outer casing The bottom is provided with a support base, the two ends of the outer casing are respectively provided with air inlets, and on the motor shaft between the outer casing and the inner casing and close to the air inlets are connected with blades with opposite directions of rotation. In the heat dissipation fan, a plurality of heat dissipation strips are wound around the high heat generation area of the inner casing along the circumferential direction, and the outer casing is provided with a plurality of air outlets near the middle position of the heat dissipation strip.

Through the above technical solutions, the stator-rotor device inside the inner casing will generate a lot of heat during operation, which is the main heat-generating part of the motor. Several heat dissipation strips wound in the circumferential direction can quickly transfer the heat inside the motor to the heat dissipation strip, and then cool the heat dissipation strip, which is convenient to reduce the temperature of the main components inside the motor and improve the service life of the motor.

A set of cooling fans with opposite blade rotations at both ends of the inner side of the outer casing can help to achieve air convection. The cold air is sucked in by the cooling fan from the air inlet, and the cold air on both sides forms a high-speed convection around the high heat dissipation area of the motor, which is taken away. The heat on the heat dissipation strip and the support sheet is finally discharged from the air outlet, which effectively reduces the heat in the high heat dissipation area of the motor.

The utility model is further provided that: the support sheet is a heat sink.

Through the above technical solution, the support sheet can attract the heat inside the motor to the support sheet while supporting the outer casing, thereby increasing the heat dissipation area and improving the heat dissipation effect.

The utility model is further configured as follows: the support sheets are separated into two groups, and the support sheets of the two groups are uniformly arranged in different directions along the circumference.

Through the above technical solution, the supporting fins are divided into two groups at intervals and are inclined in different directions to help improve the supporting effect. At the same time, the area of the supporting fins arranged obliquely is larger than the area of the supporting fins arranged straight, thereby increasing the area of the cooling fins. Improve cooling effect.

The utility model is further configured as follows: the support sheet, the inner casing and the outer casing form a plurality of trapezoidal cooling air ducts.

Through the above technical solution, when the air flows in the trapezoidal heat dissipation air duct, the air vortex will be formed due to the different air velocity at the upper bottom and the lower bottom of the trapezoid, so that the heat on the support sheet and the heat dissipation strip can be taken away more comprehensively and uniformly. , which can effectively reduce the temperature of the motor during operation.

The utility model is further provided that: the cooling fan is a turbine cooling fan.

Through the above technical solution, the turbo cooling fan is used instead of the ordinary cooling fan. Compared with ordinary cooling fans, the airflow direction is perpendicular to the rotating shaft, and it can dissipate heat faster when combined with the stepped cooling air duct.

The utility model is further provided that: the heat dissipation strip is a copper heat dissipation strip.

Through the above technical solutions, the copper heat dissipation strip has the advantages of good thermal conductivity, high ductility and light weight, which can more quickly attract the heat generated by the motor during operation and discharge the heat, and at the same time, the good ductility can make the processing process more convenient. The heat dissipation strip can be closely attached to the outer wall of the inner casing, and at the same time, the weight of the casing can be reduced, which is convenient for subsequent processing and transportation.

The utility model is further configured as follows: the heat dissipation strip is a flat heat dissipation strip, and the surface with a larger area is attached to the inner casing.

Through the above technical solution, the surface of the heat dissipation strip is made into a flat shape with a larger area and is attached to the inner casing to improve the contact surface contact between the heat dissipation strip and the inner casing, thereby increasing the heat dissipation area and reducing the temperature of the high heat dissipation area.

The utility model is further provided that: the air outlet is spaced at the places where the middle position of the outer casing and the trapezoidal cooling air duct are in contact with each other.

Through the above technical solution, in order to ensure that each trapezoidal cooling air duct is provided with an air outlet, to prevent the hot air from being unable to be discharged from the air outlet due to the unreasonable location of the air outlet, resulting in heat accumulation, resulting in excessive local temperature and affecting the normal operation of the motor Therefore, air outlets are arranged at intervals between the middle position of the outer casing and the position where the trapezoidal cooling air duct is in contact, so as to ensure that the heat in each trapezoidal cooling air duct can be discharged from the corresponding air outlet to prevent the local temperature of the motor from being too high. Affect the normal use of the motor.

To sum up, the utility model has the following beneficial effects:

1. Winding the copper heat dissipation strip in the high heat dissipation area of the motor can quickly attract the heat inside the motor to the heat dissipation strip, thereby effectively reducing the temperature of the motor;

2. Use a pair of turbo cooling fans with opposite fan blades to form high-speed air convection in the high heat dissipation area of the motor, so that the heat of the motor can be quickly discharged, thereby improving the heat dissipation efficiency.

Description of drawings

Fig. 1 is the overall structure schematic diagram of this embodiment;

2 is a schematic structural diagram of the inner casing of the present embodiment;

Fig. 3 is the front view of this embodiment;

Fig. 4 is the sectional view along the A direction of Fig. 3;

FIG. 5 is a cross-sectional view along the B direction of FIG. 3 .

Reference numerals: 1. Inner casing; 11. Heat dissipation strip; 2. Outer casing; 21, Air inlet; 22, Air outlet; 23, Support sheet; 24, Trapezoidal cooling air duct; 3, Cooling fan; 4, Support pedestal.

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

Example:

Referring to FIGS. 1 and 2 , an explosion-proof motor casing with high heat dissipation efficiency includes an inner casing 1 and an outer casing 2 connected to the inner casing 1 through a plurality of support sheets 23 evenly arranged along the axial direction. The bottom of the outer casing 2 is connected to the inner casing 1. There is a support base 4 for fixing the explosion-proof motor on the working plane, and the two ends of the outer casing 2 are provided with star-shaped air inlets 21, on the motor shaft between the outer casing 2 and the inner casing 1 and close to the air inlet 21 There are cooling fans 3 with opposite directions of blade rotation at the positions of the inner casing 1, and a number of cooling strips 11 are wound around the high heat generation area on the inner casing 1 along the circumferential direction. The contact positions of the cooling air ducts 24 are spaced apart from each other with a plurality of air outlets 22 of different sizes.

Referring to FIG. 5 , the supporting sheet 23 provided between the outer casing 2 and the inner casing 1 can provide a supporting force to ensure that the outer casing 2 does not become invariant, and can also transfer the heat inside the motor to the supporting sheet 23 through the inner casing 1 , to increase the heat dissipation area, so as to initially take away the heat inside the motor during the air flow.

The supporting pieces 23 evenly arranged along the axial direction between the outer casing 2 and the inner casing 1 are divided into two groups at intervals and are evenly arranged in different directions. While increasing the supporting force, the area of the inclined supporting pieces 23 is larger than that of the straight The area of the supporting fins 23 arranged so as to increase the area of the radiating fins and improve the heat dissipation effect.

The support sheet 23, the outer casing 2 and the inner casing 1 form a plurality of evenly arranged trapezoidal cooling air ducts 24. When the air flows in the trapezoidal cooling air duct 24, due to the different air flow rates at the upper bottom and the lower bottom of the trapezoid, the The air pressure is different, the pressure in the place with high air velocity is lower than the pressure in the position with low air velocity, so the air will flow from the position with high pressure to the position with low pressure, thus forming an air vortex in the trapezoidal cooling air duct 24, which can The heat on the support sheet 23 and the heat dissipation strip 11 is taken away more comprehensively and uniformly, which can effectively reduce the temperature of the motor during operation.

Referring to Figures 2 and 4, the stator and rotor of the motor on the inner casing 1 are wound with several turns of copper heat dissipation strips 11 at high heat generation positions. The heat is exported to the heat dissipation strip 11, and finally the heat is discharged into the air. Taking advantage of the good ductility of copper, the copper heat dissipation strip 11 is made into a flat strip, and the position with a larger area is only attached to the inner casing 1, which is beneficial to increase the size of the heat dissipation strip 11 and the inner casing. 1 contact area, which is convenient for rapid heat conduction, on the other hand, it can reduce the amount of copper, which is conducive to reducing costs.

A number of long strip-shaped air outlets 22 are arranged on the outer casing 2 at intervals near the middle of the heat dissipation strip 11 , and the air outlets 22 are at equal distances from both ends of the outer casing 2 . When the air outlet 21 is inhaled by the cooling fan 3, since the distances from the air outlet 22 to the air inlets 21 at both ends are equal, and the rotational speed of the cooling fan 3 is the same, the cold air on both sides will flow in the opposite direction and gather at the position of the air outlet 22, taking away heat dissipation. Compared with the heat on the strip 11 and the heat sink, the cooling air speed can be increased compared with the single fan under the same shaft speed, so that the high heat dissipation area can be cooled more effectively and the heat dissipation efficiency is increased. At the same time, in order to prevent the internal heat accumulation of some trapezoidal cooling air ducts 24 from being able to be discharged from the air outlet 22 due to the unreasonable opening of the air outlet 22, the temperature inside some trapezoidal cooling air ducts 24 is too high and the motor is damaged. In the embodiment, a number of air outlets 22 are provided at intervals between the intermediate positions on the outer casing 2 and the positions where each trapezoidal cooling air duct 24 contacts, so as to ensure that each trapezoidal cooling air duct 24 has a corresponding air outlet 22 to avoid Dissipate heat, so as to avoid damage to the motor caused by excessive local temperature inside the motor.

Referring to FIG. 2, in order to increase the wind speed and thus improve the heat dissipation efficiency, the cooling fan 3 selects the turbo cooling fan 3 with a large number of blades, which can increase the air intake and further increase the wind speed. On the other hand, the airflow generated by the turbo cooling fan 3 is relatively Compared with the common cooling fan 3, the airflow direction is perpendicular to the rotating shaft, and it can dissipate heat faster when combined with the stepped air channel.

Brief description of the use process: when the explosion-proof motor is working, the turbo cooling fans 3 at both ends suck in cold air from the air inlet 21 and flow in the opposite direction. The air gathers at the stator and rotor parts of the motor with high heat generation, takes away the heat inside the motor absorbed on the copper heat dissipation strip 11 , and finally discharges the hot air from the air outlet 22 .

This specific embodiment is only an explanation of the present utility model, and it is not a limitation of the present utility model. Those skilled in the art can make creativity in the present embodiment as required after reading this specification.

Contributed modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims (8)

1. The utility model provides an explosion-proof motor housing that radiating efficiency is high, includes inner housing (1) and through a plurality of backing sheets (23) connect in outer housing (2) of inner housing (1), outer housing (2) bottom is equipped with supporting pedestal (4), its characterized in that, air intake (21) have been seted up respectively at outer housing (2) both ends outer housing (2) with on the motor shaft between inner housing (1) and be close to air intake (21) position is connected with the blade and revolves to opposite radiator fan (3) the high heat generation district of inner housing (1) has a plurality of heat dissipation strip (11) along the circumferencial direction winding, outer housing (2) are being close to the intermediate position of heat dissipation strip (11) is equipped with a plurality of air outlets (22).

2. The explosion-proof motor housing with high heat dissipation efficiency as recited in claim 1, wherein the support sheet (23) is a heat sink.

3. The explosion-proof motor housing with high heat dissipation efficiency as recited in claim 2, wherein the supporting plates (23) are divided into two groups at intervals, and the two groups of supporting plates (23) are uniformly arranged along different circumferential directions.

4. The explosion-proof motor housing with high heat dissipation efficiency as recited in claim 3, wherein the support sheet (23) forms a plurality of trapezoidal heat dissipation air ducts (24) with the inner housing (1) and the outer housing (2).

5. The explosion-proof motor housing with high heat dissipation efficiency as recited in claim 1, wherein the heat dissipation fan (3) is a turbine heat dissipation fan.

6. The explosion-proof motor housing with high heat dissipation efficiency as recited in claim 1, wherein the heat dissipation strip (11) is made of copper.

7. The explosion-proof motor housing with high heat dissipation efficiency as recited in claim 1, wherein the heat dissipation strip (11) is a flat heat dissipation strip, and the surface with a larger area is attached to the inner housing (1).

8. The explosion-proof motor housing with high heat dissipation efficiency as recited in claim 4, wherein the air outlets (22) are arranged at intervals at the places where the middle position of the outer casing (2) is in contact with the trapezoidal heat dissipation air duct (24).

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