METHOD FOR AUTOMATICALLY CONTROLLING DISPLACEMENT OF VALVE MEMBER OF EJECTED FLUID CONTROL VALVE ACCORDING TO SPRAYING DISTANCE

摘要

PURPOSE:To automatically make spraying under specified conditions by determining the relation between a spraying distance and valve member position by simple function calculations without the need for actually spraying fluid and determining the relation between the spraying distance and the displacement of the valve member. CONSTITUTION:The curve indicating the relation between the flow rate of the ejected fluid and the displacement of the valve member (hereafter expressed as the 1st curve) is divided to plural blocks and the curves of the respective blocks are approximated by straight lines or parabolas. The 2nd curve is drawn as the straight line in the block which is a straight line in the 1st curve and the 2nd curve is drawn as the parabola in the block which is a parabola in the 1st curve in the stage of obtaining the curve indicating the relation between the spraying distance and the displacement of the valve member (hereafter expressed as the 2nd curve). The trial spraying is then carried out at two points at the spraying distances different from each other in the range within one block. The straight line or parabola within said one block is thereby determined. The ratio of the gradient between the one block and the other block of the 1st curve is similarly fitted to the 2nd curve as well in the other blocks, by which the straight line or curve of the other blocks is determined.