Development trend of explosion-proof motors for centrifuges
Date: 2016-12-01Read: 7
1. Mining explosion-proof motor
(1) Developing high-power motors: Currently, the maximum installed capacity of coal mining machines in the world has exceeded 1200kW, with a drive motor power of 600kW; the maximum installed capacity of scraper conveyors in mining areas has exceeded 1500kW, with a drive motor power of 725kW. The maximum power of coal mining machine drive motors in China is 400kW, and the maximum power of scraper conveyor drive motors is 315kW.
(2) Developing mining motors with voltages of 3.3kV, 6kV, and IOkV: This is because the extension of the mining area after the popularization of comprehensive mechanized coal mining units has led to an increase in voltage drop, and the use of high-power motors also requires an increase in voltage levels.
(3) Developing dual speed motors for mining: In order to meet the working needs of low-speed starting and high-speed operation of coal mine conveyors, foreign mining scraper conveyors are all driven by dual speed motors. However, currently there is a certain gap between the power range, performance indicators, and supporting control switch performance of domestically produced mining dual speed motors and the advanced level.
(4) Improving the reliability of mining motors: The working conditions of mining explosion-proof motors are poor, with frequent high load starting, large load changes, large voltage fluctuations, high environmental temperatures, and certain corrosiveness, all of which affect the reliability and service life of the motor.
(5) Accelerate the upgrading of explosion-proof motors for mining.
(6) Unified standards for explosion-proof motors used in mining.
2. Explosion proof motors for petrochemical systems
(1) The demand for increased safety and spark free motors will be on the rise. Users of petrochemical systems in practical use; We have recognized the necessity of developing increased safety and spark free motors in China. In addition, it is now time to replace a large number of increased safety and spark free motors that were used in the bow inlet devices of the 1970s with suitable domestic products.
(2) The reliability of explosion-proof motors has been increasingly concerned by petrochemical system users. The development of petrochemical enterprises is increasingly characterized by large-scale equipment and continuous operation, requiring system operation to achieve long-term, maintenance free or minimal maintenance. Therefore, explosion-proof motors have become key equipment to ensure the above requirements.
(3) Explosion proof and variable frequency speed regulating motors have become energy-saving products urgently requested by petrochemical users. In recent years, YBx and YAX explosion-proof motors have been produced in series and have been well received by users after being put into the market. There are two aspects of energy-saving for explosion-proof motors: one is to develop explosion-proof motor products, and the other is to extensively develop various explosion-proof speed regulating motor products, especially designing motors with huge energy-saving potential for fans, pumps, and compressors as speed regulating motors.
(4) The new requirements brought about by the development of coastal petrochemical enterprises. A number of refineries will be built along the coast of our country, and crude oil needs to be imported. However, imported crude oil has high sulfur content and severe corrosiveness, so explosion-proof motors are required to improve their anti-corrosion performance; In addition, imported crude oil needs to be shipped by sea, and its storage tanks require explosion-proof motors with high lift and high flow oil pumps.
(5) The great development of the petroleum industry in western China requires the development of explosion-proof motor products suitable for desert dry and hot environments. The market demand for medium to large capacity increased safety brushless excitation synchronous motors used in hydrogenation units will continue to grow year by year.