Recommendations for the purchase of explosion-proof motors for cranes

Explosion-proof motor is a kind of motor that can be used in flammable and explosive plants, and it does not produce electric sparks during operation. Single-girder cranes usually refer to single-girder bridge cranes. The main beams of single-beam crane bridges mostly use I-shaped steel or a combined section of steel and steel plates. Lifting trolleys are often assembled by chain hoists, electric hoists, or hoists as parts of the lifting mechanism. In places where cranes are required to work, and the goods carried are places with flammable, explosive or dusty environments, explosion-proof motors are the first choice. Below we will mainly talk about how to purchase crane explosion-proof motors.

BZD EX 0.5t explosion-proof cantilever crane

Selection principle

1. Identify the nature of the application site.

2. The gas explosion site should be divided into areas according to the degree of danger.

3. Identify the temperature group of the application site.

4. For explosion-proof, safe pressurization, positive pressure ventilation and explosion-proof motors, their use places should be regarded as similar or similar places, and only choose non-sparking motors and dust-proof motors for explosion-proof in these places.

5. Determine the explosion-proof grade of the explosion-proof crane motor.

6. When choosing the safety supercharger (Thesupercharger) or positive pressure explosion-proof motor, you should consider the corresponding protection device, otherwise the explosion-proof safety cannot be guaranteed.

Select category

1. Motor selection is based on factors such as AC or DC, mechanical characteristics, speed regulation and starting performance, maintenance, etc.

2. General production (Produce) machinery, with rigid mechanical characteristics (Data Terminal Equipment), no special requirements for speed regulation. Single-girder cranes usually refer to single-girder bridge cranes. The main beams of single-beam crane bridges mostly use I-shaped steel or a combined section of steel and steel plates. The hoisting trolley is often assembled by chain hoists, electric hoists, or hoists as parts of the lifting mechanism. For example, low-power (referring to how much work an object does in a unit of time) pumps, fans (Draught Fan), and small machine tools can use cage motors (Y series).

3. The crane explosion-proof motor equipment is required to have good starting performance and stable speed range. For example, cranes, hoists, rotor motors (YZR, YR series).

4. In order to increase the power factor of the power grid (referring to how much work an object does in a unit time) factor, high-power (Produce) machinery without speed regulation or low speed is required. The single beam crane has two operation modes: ground and air. There are two types of ground operation: wired handle operation and remote control handle operation; aerial operation refers to operation in the driver's cab. The driver’s cab has two types: open and closed. It can be divided into two types for installation on the left or right according to the actual situation. There are two types of entry directions: side and end to meet the needs of users. For example, high-power water pumps, air compressors (compressors), and synchronous motors can be used.

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