Anhydrous ammonia fertilizer metering and distribution apparatus and method

摘要

Fluid fertilizer is supplied to a metering assembly by fluid vapor pressure. The assembly divides fluid flow into several equal flows that are injected into the ground. The metering assembly includes a body chamber with a bottom, a top and a cylindrical wall. A driven shaft, journaled in the top wall, extends into the chamber. A rotor is fixed to the drive shaft in the chamber. Pluralities of elongated slots pass through the rotor. Discharge bores pass through a body bottom wall. Each discharge bore includes a counter bore that receives a resilient O-ring and a graphite tube. A top end of the tube engages the rotor on both sides of the elongated slot. The compressed O-ring holds the tube top in engagement with the rotor.