Dust explosion-proof motor

Abstract

A dust explosion-proof motor comprises a casing (7), a sleeve (8) is arranged on the outer surface of the casing, the front end of the sleeve is closed, the front closed end of the sleeve is connected to the front end of the casing, the rear end of the sleeve is also closed, the rear closed end of the sleeve is connected to the rear end of the casing, the upper part of the rear closed end of the sleeve is sealed and provided with a cooling water inlet pipe joint (12), the lower part of the rear closed end of the sleeve is sealed and provided with a cooling water outlet pipe joint (16), and the sleeve is filled with cooling water between the sleeve and the casing. The sleeve and the casing form a cavity, the cooling water is filled in the cavity, the outer surface of the sleeve is lower than the ambient air temperature, and no matter how much dust accumulates, it will not ignite; the cooling water in the cavity can also cool the motor, avoiding the failure of the motor due to heating; the casing of the motor cancels the heat dissipation ribs, dust is not easy to accumulate on the motor, and the cleaning frequency is reduced; the heat dissipation and cooling structure of the motor is simple and convenient to manufacture.

Description

Technical Field

[0001] This utility model relates to a dust explosion-proof motor. Background Technology

[0002] When electric motors are used in environments containing explosive dust, dust accumulates on the casing. If the casing temperature becomes too high, the dust can ignite, causing an explosion. Existing explosion-proof motors have cooling fins on the casing and fan blades at the rear of the shaft. During operation, the airflow generated by the fan removes heat from the cooling fins. However, when the ambient temperature is too high, the motor's heat dissipation efficiency decreases, increasing the risk of accidents. Furthermore, the presence of cooling fins makes the motor casing prone to dust accumulation, requiring frequent cleaning. Utility Model Content

[0003] To address the aforementioned issues, this invention proposes a dust explosion-proof motor, which effectively dissipates heat and cools the motor. Furthermore, dust does not easily accumulate on the motor, reducing the frequency of cleaning.

[0004] The technical solution of this utility model is a dust explosion-proof motor, which includes a housing 7, a stator 9 pressed onto the inner wall of the housing, a rotor 10 inserted in the stator, a front cover 6 and a rear cover 14 connected to both ends of the housing respectively, a bearing 3 in the front cover and the rear cover supporting the rotating shaft 1, a front bearing cover 5 connected to the outer side of the front cover, and a rear bearing cover 15 connected to the outer side of the rear cover. The feature is that a sleeve 8 is provided on the outer surface of the housing, the front end of the sleeve is closed, the front closed end of the sleeve is connected to the front end of the housing, the rear end of the sleeve is also closed, the rear closed end of the sleeve is connected to the rear end of the housing, a cooling water inlet pipe joint 12 is sealed at the upper part of the rear closed end of the sleeve, a cooling water outlet pipe joint 16 is sealed at the lower part of the rear closed end of the sleeve, and cooling water is filled between the sleeve and the housing.

[0005] The beneficial effects of this utility model are that a cavity is formed between the sleeve and the outer shell, and cooling water is filled in the cavity. The outer surface temperature of the sleeve can be lower than the ambient air temperature, so no matter how much dust accumulates, it will not ignite. The cooling water in the cavity can also cool the motor, preventing motor failure due to overheating. The motor outer shell eliminates the need for heat dissipation fins, making it less likely for dust to accumulate on the motor and reducing the cleaning frequency. The heat dissipation and cooling structure of this motor is simple and easy to manufacture. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model.

[0007] The attached diagram is labeled as follows: 1-shaft, 2-sealing ring, 3-bearing, 5-front bearing cover, 6-front end cover, 7-machine housing, 8-sleeve, 9-stator, 10-rotor, 11-pressure head, 12-inlet pipe connector, 13-sealing ring, 14-rear end cover, 15-rear bearing cover, 16-outlet pipe connector. Detailed Implementation

[0008] A dust explosion-proof motor includes a housing 7, a stator 9 pressed onto the inner wall of the housing, a rotor 10 inserted into the stator, a front cover 6 and a rear cover 14 connected to both ends of the housing respectively, bearings 3 in the front cover and the rear cover supporting the rotor shaft 1, a front bearing cover 5 connected to the outer side of the front cover, and a rear bearing cover 15 connected to the outer side of the rear cover, and a sleeve 8 provided on the outer surface of the housing, the front end of the sleeve being closed and connected to the front end of the housing, the rear end of the sleeve being closed and connected to the rear end of the housing, the sleeve and the housing being weldable to form an integral unit, a cooling water inlet pipe joint 12 being sealed at the upper part of the rear closed end of the sleeve, a cooling water outlet pipe joint 16 being sealed at the lower part of the rear closed end of the sleeve, and cooling water filling the space between the sleeve and the housing.

[0009] For ease of manufacturing, the closed structure at the rear end of the sleeve is as follows: the rear end of the sleeve has an inner stop, and the rear end of the housing has an outer stop. A sealing ring plate 13 is provided between the inner stop and the outer stop. The sealing ring plate is made of rubber material and is pressed by an annular pressure head 11. The inlet pipe connector and the outlet pipe connector pass through the sealing ring plate and the pressure head to enter the sleeve. The pressure head is an annular plate with annular protrusions on its surface. The outer circle of the protrusions is slightly smaller than the inner circle of the inner stop, and the inner circle of the protrusions is slightly larger than the outer circle of the outer stop. The edge of the pressure head is bolted to the flange at the rear end of the sleeve. With this structure, the sleeve and the housing can be integrally formed by casting.

[0010] To prevent dust from entering the housing through the gaps between the front bearing cover and the shaft, and between the rear bearing cover and the shaft, a sealing ring 2 is provided between the front bearing cover and the shaft. The rear bearing cover has a shaft hole-less structure, and the rear end of the shaft is located inside the rear bearing cover, that is, the rear bearing cover seals the rear bearing chamber.

[0011] The rear end cover can be an integral structure with the housing, and the rear end cover and the housing are formed as a whole by casting, which simplifies the manufacturing process.

[0012] The cooling water is tap water. The inlet pipe is connected to the water source, and the outlet pipe is also connected to the return water tank. Before the motor runs, the water source is turned on so that the space between the sleeve and the outer shell is filled with cooling water. When the motor runs, the cooling water carries away the heat generated by the motor. The outer surface temperature of the sleeve is lower than the ambient air temperature. No matter how much dust accumulates, it will not ignite. At the same time, it dissipates heat and cools the motor to prevent the motor from malfunctioning due to overheating.

Claims

1. A dust explosion-proof motor, comprising a housing (7), a stator (9) pressed onto the inner wall of the housing, a rotor (10) inserted into the stator, a front cover (6) and a rear cover (14) respectively connected to both ends of the housing, bearings (3) in the front cover and the rear cover supporting the rotating shaft (1), a front bearing cover (5) connected to the outer side of the front cover, and a rear bearing cover (15) connected to the outer side of the rear cover, characterized in that, A sleeve (8) is provided on the outer surface of the housing. The front end of the sleeve is closed and the front closed end of the sleeve is connected to the front end of the housing. The rear end of the sleeve is also closed and the rear closed end of the sleeve is connected to the rear end of the housing. A cooling water inlet pipe joint (12) is sealed at the upper part of the rear closed end of the sleeve, and a cooling water outlet pipe joint (16) is sealed at the lower part of the rear closed end of the sleeve. Cooling water is filled between the sleeve and the housing.

2. The dust explosion-proof motor according to claim 1, characterized in that, The sleeve has an inner stop at the rear end and the housing has an outer stop at the rear end. A sealing ring plate (13) is provided between the inner stop and the outer stop. The sealing ring plate is pressed by a ring-shaped pressure head (11). The inlet pipe connector and the outlet pipe connector pass through the sealing ring plate and the pressure head to enter the sleeve.

3. The dust explosion-proof motor according to claim 1, characterized in that, A sealing ring (2) is provided between the front bearing cover and the shaft. The rear bearing cover has a shaft hole-less structure, and the rear end of the shaft is located inside the rear bearing cover.

4. The dust explosion-proof motor according to claim 1, characterized in that, The rear end cover and the housing are an integral structure, formed by casting.

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