การวิเคราะห์ความแปรปรวนทางเดียวของปัจจัยความเร็วรอบของใบมีดที่มีผลต่อประสิทธิภาพของเครื่องสับใบไม้จากการปรับขนาดมูเล่ย์ตาม

Abstract

This research aimed to study the blade speed which affect the shredding efficiency. Of a leaf shredder by using one-way ANOVA analysis. Researchers changed blade speed by varying dimension of a driven pulley in 3 sizes such as 8, 10, and 12 inches respectively. There were 3 levels of the blade speed such as 543.75, 435, and 362.5 rpm respectively and the experiment for testing the shredding efficiency were conducted with 4 replications in each level of blade speed. The experimental results showed that at 543.75, 435, and 362.5 rpm, the shredding efficiency was 88.10%, 86.41%, and 83.06% respectively and the average capacity of shredding was 17.04, 14.20, and 6.63 kg/hour respectively. After analysing by one-way ANOVA analysis, results showed that at significance level of 0.05, blade speed hadn’t affected on averaged shredding efficiency. So that the blade speed at 543.75 rpm got the averaged maximum shredding efficiency and shredding capacity. The prototype of leaf shredder should use an 8-inch driven pulley in the components of the leaf shredder’s transmission.