| 摘要 |
<p>The necessity of readjusting the inlet on hammer crushers whenever the type of grain is changed is eliminated by use of a weight loaded flap, which in an initial position closes the grain inlet area and the air inlet area. To avoid overloading the motor during the starting period, the mixing chamber has a starting slot connected to the rotor space of the crusher. At the beginning the flap is in the closed position and the rotor sucks air only through the slot. Once the motor reaches its full speed, the suction at the slot is so strong, that the ensuing negative pressure in the mixing chamber lifts off the flap admitting the full stream of suction air from the rotor space through the duct and at the same time opening the grain shute. When the capacity of the rotor space is saturated, negative pressure in the mixing chamber drops and the flap throttles the admission until the grain charges is ground up, when the increasing negative pressure opens up the flap once more.</p> |
