阅读说明：本技术 一种防爆电机用风扇结构 (Fan structure for explosion-proof motor ) 是由 王旨杰 周琪华 于 2019-11-14 设计创作，主要内容包括：一种防爆电机用风扇结构,包括电机本体和设于电机本体外围的防爆机壳；所述防爆机壳的后端联接风罩,所述风罩内设有蜗型风道,所述蜗型风道内连接风扇,所述风罩上设有与蜗型风道连通的出风口；所述风扇与电机本体的转轴连接；所述防爆机壳的内壁设有多个散热条,所述散热条朝向风扇的方向弯折。本发明一方面结构紧凑,节约空间,结构布置合理,从而减小防爆风机的整体体积；另一方面,能够大大提高出风量和出风速度,进而提高散热效率。(A fan structure for an explosion-proof motor comprises a motor body and an explosion-proof casing arranged on the periphery of the motor body; the rear end of the explosion-proof shell is connected with a fan cover, a scroll air channel is arranged in the fan cover, a fan is connected in the scroll air channel, and an air outlet communicated with the scroll air channel is formed in the fan cover; the fan is connected with the rotating shaft of the motor body; the inner wall of the explosion-proof casing is provided with a plurality of heat dissipation strips, and the heat dissipation strips are bent towards the direction of the fan. On one hand, the anti-explosion fan is compact in structure, saves space and is reasonable in structural arrangement, so that the overall volume of the anti-explosion fan is reduced; on the other hand, air output and air outlet speed can be greatly improved, and further heat dissipation efficiency is improved.)

1. A fan structure for an explosion-proof motor comprises a motor body and an explosion-proof casing arranged on the periphery of the motor body; the explosion-proof air conditioner is characterized in that the rear end of the explosion-proof shell is connected with a fan cover, a scroll air channel is arranged in the fan cover, a fan is connected in the scroll air channel, and an air outlet communicated with the scroll air channel is formed in the fan cover; the fan is connected with the rotating shaft of the motor body; the inner wall of the explosion-proof casing is provided with a plurality of heat dissipation strips, and the heat dissipation strips are bent towards the direction of the fan.

2. The fan structure for the explosion-proof motor according to claim 1, wherein heat dissipation strips are arranged on the upper side and the lower side of the inner wall of the explosion-proof housing, and the heat dissipation strips are baffled heat dissipation strips.

3. The fan structure for the explosion-proof motor according to claim 1, wherein one end of the heat dissipation strip is connected to the explosion-proof housing, and the other end is a free end; or one end of the heat dissipation strip is connected with the explosion-proof shell through the heat dissipation plate.

4. The fan structure for the explosion-proof motor as claimed in claim 1, 2 or 3, wherein the outer wall of the explosion-proof housing is provided with heat radiating fins.

5. The fan structure for an explosion-proof motor according to claim 1, 2 or 3, wherein the fan is a thin fan, and the thickness of the fan is 5 ~ 8 mm.

6. The fan structure for the explosion-proof motor as recited in claim 1, 2 or 3, wherein the heat dissipating strip is made of copper or aluminum alloy.

7. The fan structure for the explosion-proof motor according to claim 1, 2 or 3, wherein the fan housing and the explosion-proof housing are fixed by screwing, clamping or welding.

8. A fan structure for an explosion-proof motor according to claim 1, 2 or 3, wherein the interval between adjacent heat dissipation bars is 1 ~ 10 mm.

9. The fan structure for the explosion-proof motor as claimed in claim 1, 2 or 3, wherein the scroll duct is injection molded with the fan housing.

Technical Field

The invention relates to an explosion-proof motor, in particular to a fan structure for the explosion-proof motor.

Background

The existing explosion-proof motor mainly comprises a motor body, wherein an explosion-proof shell is arranged on the periphery of the motor body, and radiating fins are arranged on the outer wall of the explosion-proof shell at intervals; the front side of the explosion-proof casing is provided with a front end cover, one end of a rotating shaft of the rotor is connected with the front end cover through a bearing, the rear side of the explosion-proof casing is provided with a rear end cover, and the other end of the rotating shaft of the rotor is connected with the rear end cover through a bearing; the rear side of the rear end cover is provided with a fan, and the rotating shaft is also connected with the fan; the rear side of the fan is provided with a fan cover which is connected with the rear end cover. The principle of fan heat dissipation does: the end part of the fan cover is provided with a vent hole, when the fan rotates, air enters from the vent hole of the fan cover and is blown out from a gap between the fan cover and the rear end cover to blow the radiating fins on the explosion-proof shell, and the heat dissipation of the motor body is greatly accelerated.

However, on one hand, the existing fan is not compactly arranged with the fan cover, so that the space is large, and the volume of the fan is large, so that the whole size of the explosion-proof fan is large; on the other hand, air is blown out through the gap between the fan cover and the rear end cover, so that the air output is small, and the heat dissipation efficiency is low.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the fan structure for the explosion-proof motor, which has the advantages of simple structure, compact structure and obvious heat dissipation effect.

The technical scheme of the invention is as follows: a fan structure for an explosion-proof motor comprises a motor body and an explosion-proof casing arranged on the periphery of the motor body; the rear end of the explosion-proof shell is connected with a fan cover, a scroll air channel is arranged in the fan cover, a fan is connected in the scroll air channel, and an air outlet communicated with the scroll air channel is formed in the fan cover; the fan is connected with the rotating shaft of the motor body; the inner wall of the explosion-proof casing is provided with a plurality of heat dissipation strips, and the heat dissipation strips are bent towards the direction of the fan.

Further, both sides all are equipped with the heat dissipation strip about the inner wall of explosion-proof casing, the heat dissipation strip is baffling heat dissipation strip.

Furthermore, one end of the heat dissipation strip is connected with the explosion-proof shell, and the other end of the heat dissipation strip is a free end; or one end of the heat dissipation strip is connected with the explosion-proof shell through the heat dissipation plate.

Further, the outer wall of the explosion-proof casing is provided with cooling fins.

Further, the fan is a thin fan, and the thickness of the fan is 5 ~ 8 mm.

Furthermore, the heat dissipation strip is made of copper or aluminum alloy.

Furthermore, the fan cover and the explosion-proof casing are fixed through screw connection, clamping connection or welding.

Further, the distance between the adjacent heat dissipation strips is 1 ~ 10 mm.

Furthermore, the worm-shaped air duct and the fan cover are formed by injection molding.

The invention has the beneficial effects that: on one hand, the structure is compact, namely, a part of space is saved by omitting a rear end cover; the fan is arranged in the volute air channel by arranging the volute air channel on the fan cover, so that compared with the existing fan and fan cover which are separately arranged, the space is saved, the fan cover is arranged closer to the explosion-proof shell, and the overall volume of the explosion-proof fan is reduced; on the other hand, through setting up the spiral wind channel, can make the fan form centrifugal fan, improve air output and air-out speed greatly, and then improve the radiating efficiency.

Drawings

FIG. 1 is a schematic view of the external structure of an explosion-proof enclosure according to an embodiment of the invention;

FIG. 2 is a schematic view of the internal structure of an explosion-proof enclosure according to an embodiment of the invention;

fig. 3 is a schematic structural diagram of a fan housing according to an embodiment of the present invention.

The attached drawings indicate the following: 1. a motor body; 2. an explosion-proof enclosure; 3. a fan housing; 4. a fan; 5. a heat dissipating strip; 11. a rotating shaft; 21. a heat sink; 31. a volute duct; 32. and (7) air outlet.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

As shown in fig. 1 ~ and fig. 3, the fan structure for the explosion-proof motor comprises a motor body 1 and an explosion-proof casing 2 arranged on the periphery of the motor body 1, wherein the rear end of the explosion-proof casing 2 is connected with a fan cover 3, a scroll air duct 31 is arranged in the fan cover 3, a fan 4 is connected in the scroll air duct 31, an air outlet 32 communicated with the scroll air duct 31 is formed in the fan cover 3, the fan 4 is connected with a rotating shaft 11 of the motor body 1, a plurality of heat dissipation strips 5 are arranged on the inner wall of the explosion-proof casing 2, and the heat dissipation strips 5 are bent towards the direction of the fan 4.

The scheme has the following advantages: (1) the fan cover is directly connected with the explosion-proof shell, and the existing rear end cover is omitted, so that the structure is more compact, and on the other hand, the heat dissipation strip is convenient to be arranged to be connected with the explosion-proof shell and bent towards the direction of the fan due to the fact that the rear end cover is not blocked, and the spatial arrangement is more reasonable; (2) the volute air duct is arranged on the fan cover, so that the air flow channel in the explosion-proof shell is gradually enlarged from small to large, the flow speed of air is reduced from fast to slow, and the air pressure is increased from low to high, so that the air pressure at the air outlet reaches the highest value, the air outlet quantity is greatly increased, and the quick heat dissipation is realized; (3) through setting up the heat dissipation strip, can lead to fan department with the heat on the explosion-proof casing to directly derive by the fan, improve the radiating rate greatly, the radiating effect is showing.

In this embodiment, the wind cover 3 and the explosion-proof enclosure 2 may be connected and fixed by means of screw connection, clamping connection, welding, or the like. And the fan housing 3 is connected to the outer wall of the explosion-proof enclosure 2.

In this embodiment, the outer wall of the explosion-proof enclosure 2 is provided with the heat dissipation fins 21, and the heat dissipation strips 5 are arranged at positions corresponding to the heat dissipation fins 21, wherein the upper side and the lower side of the inner wall of the explosion-proof enclosure 2 are both provided with the plurality of heat dissipation strips 5, the plurality of heat dissipation strips 5 are directly arranged at intervals, and the interval is preferably 1 ~ 10 mm.

In this embodiment, heat dissipation strip 5 is baffling heat dissipation strip, including vertical strip and slope strip, the one end of vertical strip and the one end formation of slope strip structure of buckling, and the other end and the explosion-proof casing 2 of vertical strip are connected, and the other end of slope strip is the free end, and the slope strip is buckled towards fan position. The heat dissipation strip 5 can be directly welded with the inner wall of the explosion-proof shell 2 into a whole; or a plurality of baffling heat dissipation strips are welded on a heat dissipation plate firstly, and the whole heat dissipation plate is welded with the inner wall of the explosion-proof shell.

In this embodiment, the heat dissipation strip 5 is preferably made of copper, so that heat can be quickly conducted to the fan 4, and the heat dissipation effect is better.

In the embodiment, the worm air duct 31 and the fan cover 3 are integrally injection molded, the fan 4 is a thin fan, the thickness of the fan 4 is preferably 5 ~ 8mm, the fan 4 comprises a hub and a plurality of blades arranged on the hub, and the blades are of an arc-shaped structure.

The working principle of the embodiment is as follows: after the fan 4 and the rotating shaft 11 of the motor body 1 are operated, the heat generated by the explosion-proof casing 2 is conducted to the fan 4 through the heat dissipation strip 5, the fan 4 rotates in the scroll air duct 31, and the heat is conducted to the air outlet 32 through the scroll air duct 31, so that the heat is discharged from the air outlet 32, and the heat dissipation effect is greatly improved.

In summary, on one hand, the structure of the invention is compact, namely, a part of space is saved by omitting the rear end cover; the fan is arranged in the volute air channel by arranging the volute air channel on the fan cover, so that compared with the existing fan and fan cover which are separately arranged, the space is saved, the fan cover is arranged closer to the explosion-proof shell, and the overall volume of the explosion-proof fan is reduced; on the other hand, through setting up the spiral wind channel, can make the fan form centrifugal fan, improve air output and air-out speed greatly, and then improve the radiating efficiency.