External heat dissipation assembly of explosion-proof motor

Abstract

The utility model discloses an external heat dissipation assembly of an explosion-proof motor, which relates to the technical field of explosion-proof motors and comprises a casing, an annular fan blade, an annular air collection cover and a fan blade driving assembly, a plurality of heat dissipation fins are arranged on the side wall of the casing along the circumferential direction at intervals, and the annular air collection cover is sleeved at one end of the casing. The annular air collecting cover is provided with an annular cavity penetrating through the rear end of the annular air collecting cover, the annular fan blades are rotationally arranged in the annular cavity, and the fan blade driving assembly is arranged on the annular air collecting cover and connected with the annular fan blades; the front end of the annular air collecting cover is provided with an arc-shaped air outlet hole communicated with the annular cavity, the front end of the annular air collecting cover is provided with an arc-shaped flow guide pipe communicated with the arc-shaped air outlet hole, the air outlet end of the arc-shaped flow guide pipe is provided with an air distribution plate, and the air distribution plate is provided with a plurality of branch air outlet holes facing the space between the adjacent heat dissipation fins, so that the external heat dissipation assembly is convenient to disassemble and assemble; the negative influence of the external heat dissipation assembly on natural heat dissipation of the machine shell is reduced, and the heat dissipation effect is good.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof motor technology, specifically to an external heat dissipation component for an explosion-proof motor. Background Technology

[0002] Explosion-proof motors are a type of motor that can be used in flammable and explosive environments without producing electrical sparks during operation. They are primarily used in coal mines, oil and gas, petrochemical, and chemical industries. Additionally, they are widely used in textiles, metallurgy, urban gas, transportation, grain and oil processing, papermaking, and pharmaceuticals. As a primary power source, explosion-proof motors are typically used to drive pumps, fans, compressors, and other transmission machinery.

[0003] Due to the explosion-proof requirements, existing explosion-proof motors are designed with high sealing performance but poor heat dissipation, making it difficult for the motor to dissipate heat normally. Utility Model Content

[0004] The purpose of this invention is to provide an external heat dissipation component for explosion-proof motors to solve the above-mentioned technical problems.

[0005] Based on the above objectives, this utility model provides an external heat dissipation component for an explosion-proof motor, including a housing with multiple heat dissipation fins spaced circumferentially on the side wall, and also including an annular fan blade, an annular air collector shroud, and a fan blade drive assembly. The annular air collector shroud is fitted onto one end of the housing, and has an annular cavity extending through its rear end. The annular fan blade is rotatably disposed within the annular cavity, and the fan blade drive assembly is disposed on the annular air collector shroud and connected to the annular fan blade.

[0006] The front end of the annular air collector shroud is provided with an arc-shaped air outlet that connects to the annular cavity, and the front end of the annular air collector shroud is provided with an arc-shaped guide pipe that connects to the arc-shaped air outlet. The air outlet end of the arc-shaped guide pipe is provided with an air distribution plate, and the air distribution plate is provided with multiple branch air outlets facing the space between adjacent heat dissipation fins.

[0007] Furthermore, both sides of the annular air collecting hood are provided with arc-shaped air outlets and arc-shaped guide pipes, the arc-shaped guide pipes on both sides are connected, and the width of the arc-shaped guide pipes gradually decreases in the wind direction away from the annular air collecting hood.

[0008] Furthermore, a circular tube is provided at the branch outlet, the circular tube is inserted between adjacent heat dissipation fins, and multiple spiral grooves are provided on the inner wall of the circular tube to cause the airflow passing through the circular tube to rotate.

[0009] Furthermore, the annular fan blade includes an inner protective ring, an outer protective ring, and blades. The outer protective ring and the inner protective ring are coaxially arranged. The inner protective ring is rotatably disposed in the annular cavity through a bearing. The inner wall of the outer protective ring is connected to the outer wall of the inner protective ring through a plurality of blades distributed circumferentially.

[0010] Furthermore, an outer toothed protective ring is fitted on the outer protective ring, and the fan blade drive assembly includes a drive motor and a drive gear. The drive motor is mounted on the housing and is connected to the outer toothed protective ring via the drive gear. The outer wall of the annular air collecting shroud has a notch for the drive gear to be inserted into the annular cavity.

[0011] Furthermore, the inner wall of the annular wind collector is provided with a plurality of first strip-shaped holes along the circumference, and the inner protective ring is provided with a plurality of second strip-shaped holes located between adjacent blades.

[0012] Furthermore, the rear end of the annular air collecting hood is provided with an annular cover plate, and the annular cover plate is provided with multiple air inlets along the circumferential direction.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model uses an annular air collection cover fitted on the rear end of the casing as a base, which not only facilitates the disassembly and assembly of the external heat dissipation components, but also helps to reduce the negative impact of the external heat dissipation components on the natural heat dissipation of the casing compared with the commonly used method of setting the external heat dissipation components on the top of the casing.

[0015] 2. This utility model utilizes an annular air collecting shroud and an arc-shaped guide pipe to blow the airflow generated by the annular fan towards the gap between multiple adjacent fins on the side of the casing, thereby accelerating the heat dissipation of the explosion-proof motor. This solves the problem that the heat dissipation efficiency of the explosion-proof motor is poor because the hot air is obstructed by multiple heat dissipation fins on the side of the casing after heating the air. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the annular cover plate of this utility model;

[0019] Figure 3 For the present utility model Figure 1 The main view;

[0020] Figure 4 This is a schematic diagram of the structure of the annular air collecting shroud and the arc-shaped guide pipe of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the annular air collecting shroud of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the annular air collecting shroud of this utility model;

[0023] Figure 7 This is a schematic diagram of the internal structure of the arc-shaped guide tube of this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of the annular fan blade of this utility model.

[0025] The numbers in the figure are:

[0026] 1-Heat dissipation fins; 2-Casing; 3-Annular fan blades; 4-Annular air collector cover; 5-Fan blade drive assembly; 6-Annular cavity; 7-Arc-shaped air outlet; 8-Arc-shaped air guide pipe; 9-Air distribution plate; 10-Branch air outlet; 11-Round pipe; 12-Air inlet; 13-Outer toothed guard ring; 14-Annular cover plate;

[0027] 301 - Inner sheath; 302 - Outer sheath; 303 - Blade;

[0028] 501 - Drive motor; 502 - Drive gear. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] like Figures 1 to 8 As shown, an external heat dissipation assembly for an explosion-proof motor includes a housing 2 with multiple heat dissipation fins 1 spaced circumferentially on the side wall, and also includes an annular fan blade 3, an annular air collector shroud 4, and a fan blade drive assembly 5. The annular air collector shroud 4 is sleeved on one end of the housing 2 and has an annular cavity 6 extending through its rear end. The annular fan blade 3 is rotatably disposed in the annular cavity 6. The fan blade drive assembly 5 is disposed on the annular air collector shroud 4 and connected to the annular fan blade 3.

[0031] The front end of the annular air collector shroud 4 is provided with an arc-shaped air outlet 7 that connects to the annular cavity 6, and the front end of the annular air collector shroud 4 is provided with an arc-shaped guide pipe 8 that connects to the arc-shaped air outlet 7. The air outlet end of the arc-shaped guide pipe 8 is provided with an air distribution plate 9, and the air distribution plate 9 is provided with multiple branch air outlets 10 facing the adjacent heat dissipation fins 1.

[0032] An annular air collecting cover 4 is fitted and installed at the tail end of the housing 2, and the arc-shaped guide pipe 8 is located on the side of the housing 2 where the heat dissipation fins 1 are densely arranged. When the fan blade drive assembly 5 drives the annular fan blade 3 to rotate, it will drive the airflow to pass through the arc-shaped guide pipe 8 and multiple branch air outlets on the air distribution plate 9 in sequence, and blow it into the gaps between multiple adjacent heat dissipation fins 1, so as to accelerate the heat dissipation of the housing 2 and achieve the purpose of cooling the explosion-proof motor.

[0033] Unlike existing external heat dissipation methods for motors, this invention uses an annular air collector shroud 4 fitted onto the tail end of the housing 2 as its base. This not only facilitates the installation and removal of the external heat dissipation component but also reduces the negative impact of the external heat dissipation component on the natural heat dissipation of the housing 2 compared to the commonly used method of setting the external heat dissipation component on the top of the housing 2. Furthermore, it solves the problem of poor heat dissipation efficiency of the explosion-proof motor caused by multiple obstructions from the multiple heat dissipation fins 1 on the side of the housing 2 after heating the air.

[0034] Furthermore, both sides of the annular air collector shroud 4 are provided with arc-shaped air outlets 7 and arc-shaped guide pipes 8. The arc-shaped guide pipes 8 on both sides are connected, and the width of the arc-shaped guide pipes 8 gradually decreases in the wind direction away from the annular air collector shroud 4. This allows the airflow inside the annular air collector shroud 4 to be diverted by the arc-shaped guide pipes 8 on both sides and concentrated towards both sides of the casing 2. The reason for providing arc-shaped guide pipes 8 on both sides of the casing 2 is, on the one hand, to avoid the controller on the top of the casing 2, and because the space at the bottom of the casing 2 is insufficient to accommodate the arc-shaped guide pipes 8. In addition, the top and bottom of the casing 2 usually do not have or have few heat dissipation fins. On the other hand, because the heated air near the side of the casing 2 is obstructed by the heat dissipation fins 1 above during its ascent, thus affecting the heat dissipation on both sides of the casing 2. Therefore, providing arc-shaped guide pipes 8 on both sides of the casing 2 allows the hot air located between the adjacent heat dissipation fins 1 on both sides of the casing 2 to be discharged from the front under the blowing of the airflow, which is more conducive to the heat dissipation and cooling of the casing 2.

[0035] A further optimization of the above embodiment is that a circular tube 11 is provided at the branch air outlet 10. The circular tube 11 is inserted between adjacent heat dissipation fins 1, and multiple spiral grooves are provided on the inner wall of the circular tube 11 so that the airflow passing through the circular tube 11 rotates. After the airflow rotates, it is conducive to the full heat exchange between the columnar airflow and the casing 2 and the heat dissipation fins 1, and it can increase the negative pressure at the airflow location, which is conducive to slowing down the diffusion of the airflow and attracting nearby air, thereby further facilitating the heat dissipation and cooling of the casing 2.

[0036] The annular fan blade 3 includes an inner protective ring 301, an outer protective ring 302, and blades 303. The outer protective ring 302 and the inner protective ring 301 are coaxially arranged. The inner wall of the outer protective ring 302 and the outer wall of the inner protective ring 301 are connected by multiple blades 303 that are circumferentially spaced. As is common knowledge, the blades 303 are inclined, so that they can push the air in front to generate airflow as they rotate.

[0037] An outer toothed guard ring 13 is fitted on the outer guard ring 302. The fan blade drive assembly 5 includes a drive motor 501 and a drive gear 502. The drive motor 501 is mounted on the housing 2 and is connected to the outer toothed guard ring 13 via the drive gear 502. The outer wall of the annular air collector shroud 4 has a notch for the drive gear 502 to be inserted into the annular cavity 6.

[0038] A further optimization of the above embodiment is that a plurality of first strip-shaped holes are provided circumferentially on the inner sidewall of the annular air collecting shroud 4, and a plurality of second strip-shaped holes 15 are provided on the inner protective ring 301 and between adjacent blades 303, so that the part of the housing 2 with the annular air collecting shroud 4 can dissipate heat.

[0039] A further optimization of the above embodiment is that an annular cover plate 14 is provided at the rear end of the annular air collecting cover 4, and multiple air inlets 12 are provided on the annular cover plate 14 along the circumferential direction to facilitate the protection of the annular fan blades 3.

[0040] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. An external heat dissipation assembly for an explosion-proof motor, comprising a housing (2) with a plurality of heat dissipation fins (1) arranged at intervals along the circumferential direction on the side wall, characterized in that: It also comprises an annular fan blade (3), an annular wind collecting cover (4) and a fan blade driving assembly (5), wherein the annular wind collecting cover (4) is sleeved on one end of the casing (2), the annular wind collecting cover (4) has an annular cavity (6) penetrating the rear end thereof, the annular fan blade (3) is rotatably arranged in the annular cavity (6), and the fan blade driving assembly (5) is connected to the annular fan blade (3); The front end of the annular air collecting hood (4) is provided with an arc-shaped air outlet hole (7) connected to the annular cavity (6), and the front end of the annular air collecting hood (4) is provided with an arc-shaped flow guide pipe (8) connected to the arc-shaped air outlet hole (7), and the air outlet end of the arc-shaped flow guide pipe (8) is provided with an air distribution plate (9), and the air distribution plate (9) is provided with a plurality of branch air outlet holes (10) facing between adjacent heat dissipation fins (1).

2. The external heat dissipation assembly of an explosion-proof motor according to claim 1, characterized in that: Arc-shaped air outlet holes (7) and arc-shaped flow guide pipes (8) are provided on both sides of the annular wind collecting cover (4); the arc-shaped flow guide pipes (8) on both sides are connected, and the width of the arc-shaped flow guide pipes (8) gradually decreases in the wind direction away from the annular wind collecting cover (4).

3. The external heat dissipation assembly of an explosion-proof motor according to claim 1, characterized in that: A circular tube (11) is provided at the branch air outlet (10), the circular tube (11) is inserted between adjacent heat dissipation fins (1), and a plurality of spiral grooves are provided on the inner wall of the circular tube (11) so as to cause the airflow passing through the circular tube (11) to rotate.

4. The external heat dissipation assembly of an explosion-proof motor according to claim 1, characterized in that: The annular fan blade (3) comprises an inner protective ring (301), an outer protective ring (302) and blades (303); the outer protective ring (302) and the inner protective ring (301) are coaxially arranged; the inner protective ring (301) is rotatably arranged in the annular cavity (6) via a bearing; the inner wall of the outer protective ring (302) and the outer wall of the inner protective ring (301) are connected via a plurality of blades (303) distributed at circumferential intervals.

5. The external heat dissipation assembly of an explosion-proof motor according to claim 4, characterized in that: The outer guard ring (302) is sleeved with an outer tooth guard ring (13); the fan blade drive assembly (5) comprises a drive motor (501) and a drive gear (502); the drive motor (501) is arranged on the housing (2) and is transmission-connected to the outer tooth guard ring (13) via the drive gear (502); and a notch is provided on the outer side wall of the annular air collecting cover (4) for the drive gear (502) to be inserted into the annular cavity (6).

6. The external heat dissipation assembly of an explosion-proof motor according to claim 1, characterized in that: An annular cover plate (14) is provided at the rear end of the annular air collecting cover (4), and a plurality of air inlet holes (12) are provided on the annular cover plate (14) along the circumferential direction.

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