Studies on the Computer Aided Design of Power Sprayer (II)

Simulation of valve Movement and its Design

Abstract

The simulation of valve movement and the computer aided design of suction and discharge valves in power sprayer are described in this report.
These valves have been designed as the result of experiment repeated about the combinations of valve and valve spring.
The main sizes of valve was calculated using the values of maximum, mean and upper and lower limits of confidence limit 95% which was obtained from 39 power sprayers for flow velocity at valve seat. The valve having the maximum volumetric efficiency was designed by the computer simulation in stead of experiments for valve performance in power sprayer.
The following results obtained.
(1) The results of simulation for valve movement almost coincided with those of experiment.
(2) The results of simulation varing spring constants of valve spring were shown in Fig. 5 and 6. When the spring constant was greater, the maximum lift of valve was lower, but the volumetric efficiency of discharge flow simulated between valve and valve seat, was greater.
(3) On the valve spring and valve sizes, the results of calculation by this program and values of supplied model were shown in Table 1. The results of simulation for the valve designed by this program almost coincided with those of experiment on supplied model.
The validity of programing was recognized.