What is an explosion-proof motor? Why are they explosion-proof?

In the field of industrial production, especially in those environments where flammable and explosive substances exist, explosion-proof motors play a vital role. It is a specially designed and manufactured motor equipment that can operate safely in places with explosive hazards.

I. What is an explosion-proof motor?

Explosion-proof motors may look similar to ordinary motors from the outside, but there are strict requirements in terms of internal structure, component materials and manufacturing process. Its shell is usually made of high-strength metal materials, such as cast steel, cast iron, etc., with a high degree of sealing, which can effectively prevent the internal sparks, arcs and high temperatures and other dangerous factors may leak into the external environment. At the same time, the junction box, shaft seal and other parts of the explosion-proof motor have been specially treated to ensure the overall explosion-proof performance. For example, the sealing gasket of the junction box is made of oil- and heat-resistant rubber material, and the shaft seal is made of high-quality sealing device, which prevents flammable gas or dust from entering into the motor.

II, the principle of explosion-proof motor

Rather than being able to stop other explosive events from occurring, explosion-proof motors focus on preventing explosions caused by problems with the motor itself.

The basic principle is to consume or control the energy that could trigger an explosion in a number of ways.

For example, when an electrical fault in the motor windings produces a sparking effect, the special design of the motor confines it to the motor’s internal cavity.

On the one hand, a sufficient degree of protection enables the motor to withstand explosive shocks in the external environment;

On the other hand, by carefully designing sufficiently long mating lengths and sufficiently small mating gaps between parts, flame propagation can be effectively blocked and energy can be gradually consumed internally.

In addition, for the casing or parts that come into direct contact with the external environment during motor operation, the materials and surface treatment are also strictly screened to ensure that no explosive sparks or other consequences are generated as a result of motor operation.

III, the main application of explosion-proof motor scene

Explosion-proof motors are used in an extremely wide range of application scenarios.

In the coal mining industry, it is used to drive underground coal mining machines, transportation machines, ventilators and other equipment to ensure safe operation in environments where flammable and explosive gases such as gas are present.

Oil and gas field, whether offshore drilling platforms or land-based refineries, explosion-proof motors are used to drive various types of pumps, compressors, etc., to ensure the safety of oil and gas extraction, transportation and processing.

In petrochemical and chemical industries, it is used in reactor mixing and material transportation to prevent explosions caused by leakage of chemical raw materials.

In addition, like the textile industry, some of the existence of combustible fiber dust workshop, metallurgical industry near the gas furnace, city gas transmission pumping station, the transportation field of the gas filling station, grain and oil processing may produce dust explosion in the process of places, paper mills pulp workshop and the production of medicine in the hazardous process, etc., are inseparable from the explosion-proof motors of the figure.

IV, the main manufacturers of explosion-proof motors

There are many well-known manufacturers of explosion-proof motors at home and abroad. In the domestic company has the industry leader, its products cover a wide range of types and specifications of explosion-proof motors, which are widely used in many domestic hazardous places, and also have a certain share in the international market.

Domestic also has a high reputation, strong technical strength, able to produce explosion-proof motor products to meet the needs of different customers. Overseas Siemens, ABB and other large electrical equipment manufacturers also have excellent performance in the field of explosion-proof motors.

Siemens’ explosion-proof motors are widely used worldwide for their advanced technology, reliable quality and perfect after-sales service.

ABB’s explosion-proof motors, with their focus on innovation and energy efficiency, are favored in some of the most sophisticated industrial sectors. These manufacturers strictly follow international and domestic explosion-proof standards and continuously invest in research and development to improve the performance, reliability and safety of explosion-proof motors to meet the demands of increasingly complex and stringent industrial production environments.

With its unique design, reliable explosion-proof principle, a wide range of application scenarios and the support of many professional manufacturers, explosion-proof motors have become the key equipment to ensure the safety of production in flammable and explosive places. With the continuous development of industrial technology, explosion-proof motors will also continue to innovate and make progress to protect industrial safety.