Explosion-proof type motor structure suitable for different explosion-proof levels

Abstract

The invention provides an explosion-proof type motor structure suitable for different explosion-proof levels. The explosion-proof type motor structure comprises a junction box, a machine base, an endcover and an inner bearing cover; wherein the junction box comprises a box cover, a box base and a support. The box base is matched with the support in a first plane, and a first movable block which is connected with the box base pin is arranged on the box base, so that the box base, the support and the first movable block form a second spigot fit. The support is matched with the machine base in asecond plane, and a surface bench matching with support on the machine base is thickened to the interior of the machine base. A convex part is arranged on the support, so that the thickened part andthe convex part form a third spigot fit. The end cover is matched with the bearing inner cover in a third plane, and the upper surface of the bearing inner cover is provided with a plane. A second movable block connected with the end cover pin is arranged on the end cover, so that the end cover, the second movable block and the bearing inner cover form a fifth spigot fit. The structural unification of the motors with different explosion-proof levels is achieved through design optimization or minor verification, so that the motors with different explosion-proof levels can be produced by using the same set of dies.

Description

technical field [0001] The invention belongs to the technical field of flameproof motors, and in particular relates to a structure of flameproof motors suitable for different explosion-proof grades. Background technique [0002] According to the provisions of GB3836.2-2010 "Explosive Atmosphere Part 2: Equipment Protected by Flameproof Enclosure "d", the explosion-proof joint surface of motors with explosion-proof grade Ex d IIB T4 Gb can choose plane flameproof joint surface, explosion-proof The flameproof joint surface of the motor with the grade of Ex dIIC T4 Gb can only choose the seam joint surface. [0003] Because the processing cost of the flat flameproof joint surface is much smaller than that of the spigot joint surface, and the space size requirement of the plane flameproof surface is small, the explosion-proof grade is Ex d IIB T4 Gb motor, and the motor is suitable for the plane flameproof joint surface. Choose a plane flameproof joint surface, such as figure ...

AI Technical Summary

Problems solved by technology

As a result, motors with the same electrical specifications, explosion-proof grades Ex d IIB T4 Gb and Ex d IIC T4 Gb motors have different explosion-proof structures, resulting in inconsistent structure of the motor structural parts of the two explosion-proof grades. The seat structure is not uniform, the end cover structure is not uniform, and the bearing inner cover structure is not uniform

[0004] The inconsistency of the structure of the motor structural parts will lead to the need to make different molds when producing motors with different flameproof levels, which will greatly increase the production cost

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