External heat radiation assembly of explosion-proof motor
Technical Field
The utility model relates to the technical field of explosion-proof motors, in particular to an external heat dissipation assembly of an explosion-proof motor.
Background
The explosion-proof motor is a motor which can be used in flammable and explosive places and does not generate electric spark during operation. The explosion-proof motor is mainly used in coal mines, petroleum and natural gas, petrochemical industry and chemical industry. In addition, the method is widely applied to the departments of textile, metallurgy, urban fuel gas, traffic, grain and oil processing, papermaking, medicine and the like. Explosion-proof motors are used as the primary power equipment, typically to drive pumps, fans, compressors, and other transmission machinery.
The existing explosion-proof motor has poor heat dissipation effect due to the explosion-proof requirement, and the motor is inconvenient to normally dissipate heat.
Disclosure of utility model
The utility model aims to provide an external heat dissipation assembly of an explosion-proof motor so as to solve the technical problems.
Based on the above object, the utility model provides an external heat dissipation assembly of an explosion-proof motor, which comprises a shell, annular fan blades, an annular wind collecting cover and a fan blade driving assembly, wherein a plurality of heat dissipation fins are arranged on the side wall of the shell at intervals along the circumferential direction;
The front end of annular collection fan housing is equipped with the arc apopore of intercommunication annular chamber, just the front end of annular collection fan housing is equipped with the arc honeycomb duct with arc apopore intercommunication, the air-out end of arc honeycomb duct is equipped with the air distribution plate, the air distribution plate is equipped with a plurality of tributary apopores between the adjacent radiating fin of orientation.
Further, the two sides of the annular wind collecting cover are provided with arc-shaped wind outlet holes and arc-shaped flow guide pipes, the arc-shaped flow guide pipes are connected at the two sides, and the width of the arc-shaped flow guide pipes is gradually reduced in the wind direction away from the annular wind collecting cover.
Further, a circular tube is arranged at the branch air outlet, the circular tube is inserted between the adjacent radiating fins, and a plurality of spiral grooves are formed in the inner wall of the circular tube, so that air flow passing through the circular tube rotates.
Further, the ring-shaped fan blade comprises an inner guard ring, an outer guard ring and blades, wherein the outer guard ring and the inner guard ring are coaxially arranged, the inner guard ring is rotatably arranged in the ring-shaped cavity through a bearing, and the inner wall of the outer guard ring is connected with the outer wall of the inner guard ring through a plurality of blades which are circumferentially distributed at intervals;
further, the outer guard ring is sleeved with an outer tooth guard ring, the fan blade driving assembly comprises a driving motor and a driving gear, the driving motor is arranged on the machine shell and is in transmission connection with the outer tooth guard ring through the driving gear, and a notch for the driving gear to be inserted into the annular cavity is formed in the outer side wall of the annular wind collecting cover.
Further, a plurality of first strip-shaped holes are formed in the inner side wall of the annular wind collecting cover along the circumferential direction, and a plurality of second strip-shaped holes are formed in the inner retainer and located between adjacent blades.
Further, the rear end of the annular wind collecting cover is provided with an annular cover plate, and a plurality of wind inlet holes are formed in the annular cover plate along the circumferential direction.
The utility model has the beneficial effects that:
1. The annular wind collecting cover sleeved at the tail end of the shell is used as the base, so that the disassembly and assembly of the external heat radiating component are convenient, and compared with a mode that the external heat radiating component is arranged at the top of the shell in general, the negative influence of the external heat radiating component on the natural heat radiation of the shell is reduced;
2. According to the utility model, the annular wind collecting cover and the arc-shaped flow guide pipe are utilized to blow the air flow generated by the annular fan to the gaps among the plurality of adjacent fins on the side surface of the shell so as to accelerate the heat dissipation of the explosion-proof motor, and the problem that the heat dissipation efficiency of the explosion-proof motor is poor because the plurality of heat dissipation fins on the side surface of the shell are subjected to multiple obstruction from the plurality of heat dissipation fins in the rising process of hot air after the air is heated is solved.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only of the utility model and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of the structure of the annular cover plate of the present utility model;
FIG. 3 is a front view of FIG. 1 of the present utility model;
FIG. 4 is a schematic view of the structure of the annular wind collecting hood and the arc-shaped flow guiding pipe of the present utility model;
FIG. 5 is a schematic view of the internal structure of the annular air collecting hood of the present utility model;
FIG. 6 is a schematic view of the structure of the annular air collecting hood of the present utility model;
FIG. 7 is a schematic view of the internal structure of an arc-shaped flow guiding tube according to the present utility model
FIG. 8 is a schematic view of a ring fan blade according to the present utility model.
The reference numerals in the figures are:
1-radiating fins, 2-shell, 3-annular fan blades, 4-annular wind collecting cover, 5-fan blade driving component, 6-annular cavity, 7-arc air outlet hole, 8-arc honeycomb duct, 9-air distribution plate, 10-branch air outlet hole, 11-circular tube, 12-air inlet hole, 13-external tooth retainer and 14-annular cover plate;
301-inner retainer, 302-outer retainer, 303-vane;
501-driving motor and 502-driving gear.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
As shown in fig. 1 to 8, an external heat dissipation assembly of an explosion-proof motor comprises a casing 2, an annular fan blade 3, an annular air collecting cover 4 and a fan blade driving assembly 5, wherein a plurality of heat dissipation fins 1 are arranged on the side wall of the casing 2 at intervals along the circumferential direction, the annular air collecting cover 4 is sleeved at one end of the casing 2, the annular air collecting cover 4 is provided with an annular cavity 6 penetrating through the rear end of the annular air collecting cover, the annular fan blade 3 is rotatably arranged in the annular cavity 6, and the fan blade driving assembly 5 is arranged on the annular air collecting cover 4 and is connected with the annular fan blade 3;
The front end of annular collection fan housing 4 is equipped with the arc apopore 7 of intercommunication annular chamber 6, and the front end of annular collection fan housing 4 be equipped with the arc honeycomb duct 8 of arc apopore 7 intercommunication, the air-out end of arc honeycomb duct 8 is equipped with air distribution plate 9, air distribution plate 9 is equipped with a plurality of tributary apopores 10 between the adjacent radiating fin 1 of orientation.
The annular wind collecting cover 4 is sleeved and arranged at the tail end of the shell 2, the arc-shaped flow guide pipe 8 is positioned on the side surface of the shell 2, which is densely provided with the radiating fins 1, when the fan blade driving assembly 5 drives the annular fan blades 3 to rotate, air flow can be driven to sequentially pass through the arc-shaped flow guide pipe 8 and a plurality of branch air outlets on the air distribution plate 9, and the air flow is blown into gaps between a plurality of adjacent radiating fins 1, so that the heat dissipation of the shell 2 is accelerated, and the aim of cooling an explosion-proof motor is fulfilled.
In comparison with the conventional external heat dissipation mode of the motor, the external heat dissipation component takes the annular wind collecting cover 4 sleeved at the tail end of the shell 2 as a base, so that the external heat dissipation component is convenient to disassemble and assemble, and negative influence of the external heat dissipation component on natural heat dissipation of the shell 2 is reduced compared with the mode of arranging the external heat dissipation component at the top of the shell 2. And, solve a plurality of radiating fins 1 of casing 2 side behind with the air heating, can receive the multiple hindrance from a plurality of radiating fins 1 because of the hot air in-process that rises, lead to explosion-proof motor radiating efficiency's problem relatively poor.
Further, the two sides of the annular wind collecting cover 4 are provided with arc-shaped wind outlet holes 7 and arc-shaped flow guide pipes 8, the arc-shaped flow guide pipes 8 on the two sides are connected, and the width of the arc-shaped flow guide pipes 8 is gradually reduced in the wind direction away from the annular wind collecting cover 4, so that the air flow in the annular wind collecting cover 4 is respectively divided by the arc-shaped flow guide pipes 8 on the two sides and intensively blown to the two sides of the shell 2, and the arc-shaped flow guide pipes 8 are arranged on the two sides of the shell 2, so that on one hand, a controller at the top of the shell 2 is avoided, the space at the bottom of the shell 2 is difficult to meet the requirement of arranging the arc-shaped flow guide pipes 8, and the top and the bottom of the shell 2 are not provided with radiating fins or are not provided with radiating fins. On the other hand, because the heated air near the side surface of the casing 2 is blocked by the radiating fins 1 above in the rising process, the heat dissipation at the two sides of the casing 2 is affected, and therefore, the arc-shaped flow guide pipes 8 are arranged at the two sides of the casing 2, so that the hot air at the two sides of the casing 2 and between the adjacent radiating fins 1 is discharged from the front under the blowing of the air flow, and the heat dissipation and the temperature reduction of the casing 2 are more favorable.
It is further optimized in the above embodiment that the branch air outlet hole 10 is provided with a circular tube 11, the circular tube 11 is inserted between the adjacent heat dissipation fins 1, and a plurality of spiral grooves are provided on the inner wall of the circular tube 11, so that the air flow passing through the circular tube 11 rotates, after the air flow rotates, the columnar air flow is beneficial to fully exchanging heat with the casing 2 and the heat dissipation fins 1, the negative pressure at the air flow can be increased, the diffusion of the air flow is beneficial to slow down, and the air nearby is beneficial to be attracted, so that the heat dissipation and the temperature reduction of the casing 2 are further beneficial.
The ring fan blade 3 includes an inner shroud 301, an outer shroud 302, and blades 303, the outer shroud 302 and the inner shroud 301 are coaxially disposed, the inner wall of the outer shroud 302 is connected with the outer wall of the inner shroud 301 through a plurality of blades 303 circumferentially spaced apart, and it is known that the blades 303 are obliquely disposed, so that air in front can be pushed to generate air flow along with rotation.
The external tooth guard ring 13 is sleeved on the external tooth guard ring 302, the fan blade driving assembly 5 comprises a driving motor 501 and a driving gear 502, the driving motor 501 is arranged on the machine shell 2 and is in transmission connection with the external tooth guard ring 13 through the driving gear 502, and a notch for the driving gear 502 to be inserted into the annular cavity 6 is formed in the outer side wall of the annular wind collecting cover 4.
It is further optimized in the above embodiment that a plurality of first strip-shaped holes are circumferentially arranged on the inner side wall of the annular wind collecting cover 4, and a plurality of second strip-shaped holes 15 are arranged on the inner retainer 301 and between the adjacent blades 303, so that the part of the casing 2 where the annular wind collecting cover 4 is arranged can radiate heat.
It is further optimized in the above embodiment that the rear end of the annular wind collecting cover 4 is provided with an annular cover plate 14, and a plurality of wind inlet holes 12 are circumferentially arranged on the annular cover plate 14, so as to facilitate the protection of the annular fan blades 3.
It will be appreciated by those skilled in the art that the present utility model can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the utility model or equivalents thereto are intended to be embraced therein.