YB2 series flameproof three-phase asynchronous motor, which is developed according to market demand, is an ideal driving product to meet the needs of large power equipment in explosive gas environment, such as factory and coal mine. It is the basic series of explosion proof motor of YB series of our company. It has the characteristics of high efficiency, energy saving, low noise, long life and high reliability.

　　The performance of YB2 series flameproof three-phase asynchronous motor is in accordance with GB3836.2-2010 "second parts of electrical equipment for explosive gas environment: explosion proof" d "" and "standard IEC79-1" of International Electrotechnical Commission (IEC) to make separate Exdl, ExdllAT4, ExdllBT4 for non color mining face in coal mine and factory with IIA and IIB temperature. Group T1-T4 group of explosive gas mixtures exist in dangerous places.

　　What are the main points of explosion proof for YB2 series explosion-proof motors?

　　First, YB2 series explosion-proof motor is a flameproof motor, which requires explosive mixture inside something inside, and the flameproof shell should not damage or produce the deformation that affects the flameproof performance; the internal explosion flame does not allow the explosion of the external explosive mixture to be caused by the flameproof surface of the shell. Therefore, the explosion of the explosive mixture can not be caused by the explosion of the shell's flameproof surface.

　　A, components such as the shell, end cover, bearing inner cover, connection box cover, connection box seat, etc., after finishing, 1.0MPa, 10S static pressure test is qualified.

　　The gap between B, the length gap of the flameproof interface, the surface roughness, the exposed conductor inside the junction box, the electrical gap between the exposed conductor and the metal shell and the climbing distance are shown in Figure 1,2.

　　C, successive bolts of flameproof enclosure are equipped with spring washers to prevent self loosening.

　　D, chassis, end cover, bearing inner cover, junction box seat, junction box cover, wiring bolt, terminal sleeve (or wiring board), shaft and sealing ring are flameproof parts. The sealing ring material is rubber XH-21, and the structure is shown in Figure 3 below.

　　Two. Under the rated working state, the surface temperature of the motor shell must not exceed +200 C, but when the coal powder is accumulated on the outer surface of the motor, it must not exceed +150 C. The temperature outside the inlet should not be higher than the allowable temperature of the cable to ensure reliable operation of the cable.