Nanyang explosion-proof motor explains product classification, series, and characteristics to you

2023-11-22 10:29:46

Nowadays, industrial development is also relatively fast. In some production enterprises, explosion-proof products are needed. What should be chosen specifically, and what are the characteristics and advantages of each classified product? Now, Nanyang explosion-proof motor will take you to have a detailed understanding:

Equipment category:

Electrical equipment used in explosive gas environments is divided into:

Class I: Electrical equipment used underground in coal mines;

Class II: Electrical equipment for explosive gas environments other than coal mines. Class II explosion-proof type "d" and intrinsic safety type "i" electrical equipment are further divided into Class IIA, IIB, and IIC.

Electrical equipment used in combustible dust environments is classified into: Type A dust tight equipment; Type B dust tight equipment.

Product classification:

According to the explosion-proof principle, it can be divided into explosion-proof motors, increased safety motors, positive pressure motors, etc.

By matching host:

It can be divided into explosion-proof motors for coal mine transport machines, explosion-proof motors for coal mine winches, explosion-proof motors for rock loaders, explosion-proof motors for local fans in coal mines, explosion-proof motors for valves, explosion-proof motors for fans, explosion-proof motors for ships, explosion-proof motors for lifting and metallurgy, and increased safety brushless excitation synchronous motors for supporting hydrogenation devices. In addition, it can also be classified based on technical indicators such as rated voltage and efficiency, such as high-voltage explosion-proof motors, high-efficiency explosion-proof motors, high slip explosion-proof motors, and high starting torque explosion-proof motors.

Product series and its characteristics:

1. Flameproof explosion-proof motor

It uses an explosion-proof enclosure to isolate electrical parts that may generate sparks, arcs, and hazardous temperatures from the surrounding explosive gas mixture.

However, this type of casing is not sealed, and the surrounding explosive gas mixture can enter the interior of the motor through the gaps between the joint surfaces of various parts of the casing. Explosion may occur when in contact with ignition sources such as sparks, arcs, and dangerous high temperatures inside the casing. At this time, the explosion-proof casing of the motor will not be damaged or deformed, and when the explosive flame or hot gas flows out through the gap of the joint surface, it cannot ignite the surrounding explosive gas mixture.

2. Increased safety explosion-proof motor

It is a motor structure that does not generate arcs, sparks, or dangerous high temperatures under normal operating conditions, and some mechanical, electrical, and thermal protection measures are taken to further avoid the danger of arcs, sparks, or high temperatures under normal or recognized overload conditions, thereby ensuring its explosion-proof safety.

The basic series of low-voltage increased safety motors currently used in China is the YA series increased safety three-phase asynchronous motor, which is a derivative product of the Y series (IP44) three-phase asynchronous motor.

3. Positive pressure explosion-proof motor

It is a type of positive pressure electrical equipment.

Its structural characteristics are:

(1) Equipped with a complete ventilation system, there are no structural dead corners inside the motor that may affect ventilation.

(2) The casing and pipes are made of non combustible materials and have sufficient mechanical strength.

(3) Maintain sufficient positive pressure in the casing and main pipeline relative to the external atmosphere.

(4) The motor must be equipped with safety protection devices (such as time relays and flow monitors) to ensure sufficient air change, and must also have automatic protection or alarm devices for under pressure of the air pressure inside the casing.

(5) The quick opening or cover on the shell must have a device interlocked with the power supply.

The above is the relevant content explained to you by Nanyang explosion-proof motor, hoping to be helpful to you!