Development trend of explosion-proof motor

Explosion proof motor for petrochemical system

(1) new requirements for the development of coastal petrochemical enterprises. China's coastal area will be built a number of refinery, crude oil have to be imported, while imports high sulfur crude oil, severe corrosion, thus requiring explosion-proof motor improve the anticorrosion performance; also imported crude oil are required to shipping, the storage tank requires matching of high head and large discharge pump explosion-proof motor.

(2) the reliability of explosion-proof motor has been increasingly concerned by petrochemical systems. The petrochemical enterprise development is the large-scale, the operation continuous, the system operation realizes the long period, the maintenance free or the maintenance. Therefore, explosion-proof motor becomes the key equipment to ensure the above requirements.

(3) the demand will be increased safety and non sparking motor upward trend. The users of petrochemical system have realized the necessity of developing the safety and the non sparking motor in our country.. In addition, a large number of the twentieth Century 70's bow [into the device to the matching of the increased safety type, no spark motor is now the use of suitable domestic product replacement.

(4) explosion-proof and high efficiency frequency conversion motor has become an urgent need for petrochemical users to develop energy-saving products. In recent years, the series has produced YAX, YBx explosion-proof motor, after the market is very popular with users. Explosion-proof motor energy-saving has two aspects of the work: one is to develop high efficiency explosion proof motor, the second is the development of a large number of special products of various explosion-proof motor, especially has great potential for energy-saving fan, pumps and compressors motor is designed for motor speed control.

(5) the great development of China's western development of petroleum industry, requirements for explosion proof motor the desert environment. The market of the auxiliary motor with the large capacity of the hydrogenation unit will increase year by year..

Intrinsically safe type "I" (intrinsically safe electrical equipment and its associated equipment) intrinsically safe circuits: under the specified experimental conditions, normal work or fault conditions of electric spark and thermal effects are not lit the provisions of explosive gas or steam circuit. Intrinsically safe electrical equipment: all circuits for intrinsically safe electrical equipment.

This type of equipment and related equipment essential safety is divided into IA and ib:.

Ia: normal operation + a fault + any combination of the two faults can not cause the ignited electrical equipment. "

Ib: normal working + a fault condition can not cause the ignited intrinsically safe electrical equipment.

This shows that the IA level is higher than the IB level

1 the explosion-proof type "d" has the electrical equipment of the explosion-proof enclosure. It can withstand has entered inside the casing of a combustible mixture of internal explosion without damage, and through any in the shell on the junction surface and the hole can not be ignited formed by one or more gases or steam external explosive atmosphere enclosures for electrical equipment.

2 with intrinsically safe circuit and non intrinsically safe circuit, and the structure is the non essential safety circuit can not have the adverse effect to the essential safety circuit electrical equipment.

3 oil filled o

4 cast M

5 compound

6 increased safety e

7 sand filled Q

Under the conditions of the regulations, the electrical equipment will not be ignited by the ambient ignition point of the environment.. Divided into two categories:

Type I: underground electrical equipment

Class II: coal mine, underground mining, in addition to all the other explosive gas environment with electrical equipment class II can be divided into II A, II B, II class C, Mark II B equipment applicable to the use of a II equipment; C II can be applicable to the conditions for the use of a, II B.

Mine explosion-proof motor

(1) development of coal mine two speed motor: in order to adapt to the coal mine belt conveyor at low speed starting and high-speed operation need, the foreign mining scraper conveyor is the use of two speed motor drive. But the power range, the performance index and the performance of the dual speed motor of domestic mine have a certain gap compared with the advanced level of foreign countries..

(2) to improve the reliability of mine motor: poor working conditions of mine explosion-proof motor, the motor is often heavy load starting, load variation, voltage fluctuation, ambient temperature high and have certain corrosion, which affected the use reliability and the service life of the motor.

(3) speed up the upgrading of the coal mine explosion-proof motor.

(4) high power motor development: at present, the coal mining machine in the world's largest installed capacity has exceeded 1200kW, the driving motor power of 600kW; adapt to the coal mining face scraper conveyor of the largest installed capacity has exceeded 1500kW, its driving motor power has reached 725kW. At present, the maximum power of the coal mining machine is 400kW, and the maximum power of the scraper conveyor is 315kW.

(5) development of 3.3kV, 6kV and 10KV voltage Mine Electric: This is because of the popularity of comprehensive mechanical coal mining machinery, mining area to lengthen, resulting in a voltage drop increases, and the use of high power motor also requires increasing voltage.

(6) the standard of uniform coal mine explosion-proof motor.