The spring is the safety device of ultrafine vertical mill. When the non broken material falls into ultrafine vertical mill, the support ring and adjusting ring on the spring strive to lift up and compress the spring, so as to increase the discharge gap and make the non broken material discharge through the discharge port. At this time, the ultrafine vertical mill will make a violent impact sound, and the support sleeve will jump up and then work normally.
But when the iron is too frequent or is bitten by a large block, it often causes the spring failure, which leads to the damage of the machine parts. The progress of the spring has a great influence on the normal operation of mill.