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1.循环通风机的作用循环通风机是罩式退火炉(如图1)的重要设备之一,它的主要作用是将内罩里的保护气体在内罩与板垛环形空间内进行强制循环。它把从板垛中心吸入的保护气体,输送到内罩和板卷垛之间的环形空间。气体由内罩壁迅速流过时吸入了热量,当流回风机吸口方向时,将热量传给板卷边缘,使板卷迅速加热到规定温度。当加热结束后,揭下加热罩,内罩直接接触周围空气,此时循环通风机就以相反方向将热量由板垛边缘传给内罩,再由内罩
1. The role of circulating fan Circulating fan is a bell-type annealing furnace (Figure 1), one of the important equipment, its main role is to protect the inner cover of gas within the inner cover and the plate stack annular space forced circulation . It conveys the shielding gas sucked in from the center of the stack to the annular space between the inner cover and the coil. When the gas rapidly flows in through the inner wall, the heat is drawn in. When the gas flows back to the suction port of the fan, the heat is transferred to the edge of the coil so that the coil is rapidly heated to the specified temperature. When the heating is over, the heating cover is removed and the inner cover is in direct contact with the surrounding air. At this time, the circulating fan conveys the heat from the edge of the stack to the inner cover in the opposite direction,