Because of the continuous improvement and development of science and technology, the application of high-power electronic appliances in the underground has developed rapidly. Among them, the AC frequency conversion speed regulation device has the advantages of high efficiency, low failure rate, good control function, and can significantly improve the production process, which is increasingly recognized by the coal mine production industry, The frequency conversion speed regulating device used to be mainly used for the speed regulation of about 100kW of coal mining electromechanical traction components. Generally, the front stage is powered by a special transformer, which has little impact on the power grid. However, with the constant maturity of the frequency converter technology, since the successful application of electric traction shearer in the 1980s, the frequency conversion speed regulation technology has been adopted on the coal mine production equipment such as ventilator, winch, elevator, air compressor and other mechanical equipment, which not only changes the traditional production process, but also mainly reflects the high efficiency and energy saving.
For example, the selection of the main fan of the mine is based on the requirements of large air volume for the production and service life of the mine. From the construction of the mine to the production until the mine is scrapped, the air volume required in each period is different, and the difference is very large. The mechanical adjustment of the air volume causes a large amount of power consumption, and the main fan of the mine saves considerable energy by using the inverter technology; Another example is that local ventilators in the mining face are installed in many places and operate for a long time, which is a large energy consumer. Because of the continuous extension of coal mining, the air volume required for a long time is far less than the air supply capacity of the ventilators. In view of the current situation of large horse pulling trolley, the energy saving effect of adopting frequency conversion speed regulation technology is also very significant, because the frequency converter has high efficiency and good speed regulation function, It is a certain trend that electric braking and stepless speed regulation can be implemented to save electric energy, and frequency conversion technology is more widely used in coal mines. However, neither product development nor testing technology can meet the needs of production development.
How to carry out EMC detection, so that the mining inverter can be used "green" in the coal mine, and reduce the harm to the coal mine production has become an important research topic in the next phase of detection. China is the largest coal producing country in the world, and coal is the largest energy source in China. In view of the above three development trends, it is of great significance to develop mechanization and electrification of coal mining through technological innovation and accelerate the modernization of coal mines. In order to meet the requirements of technological innovation and development of enterprises, our testing institutions will continuously improve their capabilities and provide testing means and test methods to improve their predecessors.
In response to the needs of technological development, the National Safe Production Shanghai Mining Equipment Testing Center has also continuously improved its own maintenance capacity and level. For example, the 3.4m large explosion-proof test tank has been included in the plan to meet the needs of large-scale mining electrical equipment testing; The maintenance capacity of mine explosion-proof frequency converter will be upgraded to the level of 1000kW to meet the test needs of large capacity high-voltage motors and high-voltage frequency converters. Our detection part will strengthen the exchange and cooperation with enterprises by means of improving the technical support of senior detection, so as to provide technical support for technical innovation and safety management of explosion-proof electrical products for mining.
Our explosion-proof fan is equipped with explosion-proof YB2 series explosion-proof three-phase asynchronous motor as standard, which has the following main advantages:
2. High explosion-proof performance and reliable operation: motor protection is IP55, V-shaped shaft seal ring is used at the shaft through position, and the junction box is equipped with circular seam sealing ring to improve the processing accuracy of main parts. The machine base is equipped with parallel vertical radiator structure, and various electrical and mechanical design measures such as increasing the heat dissipation area are taken. In terms of dust prevention and waterproof, I have improved an equal pole, and the motor operates more reliably.
1. With dual functions of blowing and suction, one machine can be used for both suction and blowing; There is an EX-B high-pressure explosion-proof blower, which can also use suction and blowing at the same time, which is equivalent to the same function as the rotary vane vacuum pump;
3. Compared with centrifugal fan and medium pressure fan, the output pressure of explosion-proof high-pressure blower is up to 350KPA;
5. Compared with other types of fans, such as Roots fan, its running noise is lower. The higher the power is, the more significant it will be, and it will be displayed above 5.5KW;
6. Maintenance free use; Its wear parts are only two bearings, and basically do not need maintenance within the warranty period.
