Subdual of stationary thresher machine for chopping resudies

T

h

e

 c

u

tt

in

g

 l

e

ngt

h p

e

rc

e

n

ta

ge

,%

.

Moisture contant 6.50%

Moisture contant 10.2%

Moisture contant14.3%

stalks respectively at 4 cm

2 

oval slots concave, 1.5 ton/h feed rate, 

18.3m/s drum speed and 14.3 % moisture content. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig.(6): the relation between the cutting length percentage  and categories of  

cutting length at different concave clearance for different crop residues

. 

B-power consumption and energy requirement. 

Fig.(7and 8) the relation between power consumption and energy 

requirement and different factors. 

The results show that the power consumption and energy requirement for 

cutting different residues was increased with increasing drum speed, feed 

rate and moisture content for different crops residues but the power 

consumption and energy requirement were decreased by increasing oval 

slots area and concave clearance. 

The power consumption and energy requirement were increased from 

22.5 to 40.1 kW and from 15.3 to 26.7 kW.h/ton of cutting rice straw, 

from 20.3 to 38.2 kW and from 13.5 to 25.46 kW.h/ton of cutting cotton 

stalks and from 18.6 to 35.6 kW and from 12.4 to 23.7 kW.h/ton of 

cutting corn stalks whenever the drum speed increased from 13.1 to 

18.32 m/s. 

Thus The power consumption  and energy requirement  were increased 

from 28.1 to 43.4 kW and from 18.7 to 28.9 kW.h/ ton of cutting rice 

---

 Misr J. Ag. Eng., July  2007 

  

                            

                                                        

 

 

517 

0

5

10

15

20

25

30

35

40

45

50

4 c

m

2

6 c

m

2

8 c

m

2

1

3

.1 m

/s

15

.7

1 m

/s

18

.3

2 m

/s

0.5 ton/h

1

ton/h

1.5 ton/h

6.50

%

10.20

%

14.30

%

3 c

m

4 c

m

5 c

m

oval slots

drum speed

feed rate

moistue contant

concave clearance