Subdual of stationary thresher machine for chopping resudies

D- Test procedures on the experimental Stationary threshing 

machine: 

The following factors were tested to show their effect on separating 

effectiveness: 

1-oval slots area of concave: three different oval slots area were used 4, 

6 and 8 cm

2

 . 

2-Feed rate: Three different feed rates were used 0.5, 1 and  1.5 ton/h.  

3-Chopping drum speed: Three different chopping drum speeds were 

used 

13.1, 15.71 and 18.33  m/s. 

4-moisture content: three different moisture content of rice, corn and 

cotton were used 6.5, 10.2 and 14.3 %. 

5- Drum-concave clearance: three different concave clearance were 

used 3, 4 and 5 cm.          

E-Equipment and Instruments: 

1-Tractor:The source of power for the field experiments was Nasr 

tractor ,65 hp, diesel engine and (2-WD),P.T.O speed 540,1000 r.p m and 

1500 r.p.m was used to drive the machine.