Subdual of stationary thresher machine for chopping resudies

C-Operation cost :  

The operation cost ( LE/h and LE/tan) of the stationary researcher 

machine was calculated during cutting rice straw , corn stalks and cotton 

stalks under maximum feeding rate, drum speed, moisture content, 

concave clearance and oval slots area. The maximum obtained operation 

costs were found to be 25 LE/h and 17 LE/tan for cutting rice straw 

residues.        

CONCLUSION 

The main results in this study can be summarized as follows:- 

1-farmers can use the stationary threshing machine in the chopping from 

crop residues. it was succeeded with rice straw, cotton stalks and corn 

stalks for cutting the proper length, which can be used composting as 

the particular cutting size about 0.5-3 inches (1.27-7.62) cm, Luis et 

al.1993 and for feeding animal suitable (cut length <3 cm according to 

Lashin et al 1993). 

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 Misr J. Ag. Eng., July  2007 

  

                            

                                                        

 

 

519 

2-The increasing of oval slots area decreasing the percentage of cut 

length of less than 3.5 cm. While increasing the cut length of 3.5-10 

cm and more than 10 cm of all crop residues under study. 

3-The increasing of feeding rate decreasing the percentage of cut length 

of less than 3.5 cm. While increasing the cut length of 3.5-10 cm and 

more than 10 cm of all crop residues under study. 

4-The increasing of drum speed increasing the percentage of cut length of 

less than 3.5 cm and 3.5-10 cm. while reducing the cut length of >10 

cm of all crop residues under study. 

5-The increasing of  moisture content decreasing the percentage of cut 

length of less than 3.5 cm. While increasing the cut length of 3.5-10 

cm and more than 10 cm 0f all crop residues under study. 

6-The increasing of concave clearance decreasing the percentage of cut 

length of less than 3.5 cm. While increasing the cut length of 3.5-10 

cm and more than 10 cm  of all crop residues under study. 

7-Increasing the concave oval slots area decreased power 

 

 

consumption and energy required. 

8-Increasing the drum speed increased power consumption and energy 

required. 

9-Increasing the feed rate increased power consumption and energy 

required. 

10-Increasing the moisture content increased power consumption and 

energy required. 

11-Increasing drum-concave clearance decreased power consumption   

and energy required. 

12-The option condition for operating were conducted at 4 cm

2 

oval slots 

concave, 1.5 ton/h feed rate, 18.3m/s drum speed and 14.3 % moisture 

content and 3 cm drum-concave clearance,43.4 kW power 

consumption, 28.9 kW.h/ton, 25 LE/h and 17 LE/ton.