Rice Combine Flashcards
This standard specifies the requirements for the construction and performance of rice combine.
rotary device which produces a draught of air across the chaffer and cleaning sieve(s) to blow
away the materials or impurities lighter than grains
blower
cleaning fan
concave-shaped, stationary element adjacent to the threshing cylinder or threshing rotor,
fitted primarily to enhance threshing
concave
NOTE In the case of a concave that is permeable to grain flow, either in whole or in part, it has the important
secondary function of primary separation.
auxiliary conveyor to assist in feeding the crop to the threshing cylinder
crop elevator
ratio of the actual field capacity and theoretical field capacity, expressed in percent
field efficiency
device which carries the grains from grain auger to grain tank or bin
grain elevator
loss classified according to source, including all field losses attributable to the machine
grain loss
pan for collecting the clean grains after being passed through cleaning sieve(s) for conveying
to grain auger
grain pan
tank used to hold the threshed grain
grain tank
bin
portion of the combine comprising the mechanism for gathering, and cutting, stripping or
picking the crop
header
feed table
grains that have fallen to the ground due to the machine’s cutting operation
header loss
all matters other than grains such as paddy stalks and leaves, and weeds
impurities
revolving slats or arms with battens arranged parallel to the cutter bar to hold the crop being
cut by the knife and to push and guide it to a conveyor platform or feeder conveyor auger
reel
mobile grain-harvesting machine (see Figure 1) for cutting, picking, stripping or picking up
crop, threshing, separating, cleaning and conveying grain into a grain hopper and depositing
harvest residue onto the ground
rice combine
oscillating structure which supports the cleaning sieve(s) and which may also support the
chaffer and the chaffer extension
shaker shoe
shoe
assembly of two or more racks which agitates the straw and separates the remaining grains
from straw
straw walker
element placed on the rear side of the cylinder and above to rear ward of concave or concave
grate extension or transition grate to assist the deflection of straw on straw walker
stripper beater
rear beater
balanced rotating assembly, comprising rasp bars, beater bars or spikes on its periphery and
their supports, for threshing the crop, which, in conjunction with a stationary element
adjacent to it, is fitted primarily to enhance threshing, where the crop being threshed is
contained between rotating and stationary elements for less than 360°
threshing cylinder
threshing drum
computed rate of being able to reap palay in a given area per unit of time
theoretical field capacity
Field efficiency (%), minimum
75
Header loss (%), maximum
0.5
Separation loss, (%), maximum
1.3
Blower loss, (%), maximum
1.2
Unthreshed loss, (%), maximum
0.2
Scaterring loss, (%), maximum
0.3
Total machine loss (%), maximum
3.5
Purity (%), minimum
with sifter and fan
97.0
Purity (%), minimum
without sifter and fan
95
Purity (%), minimum
without cleaning devices
80
Mechanically damaged grain (%), maximum
2.0
Net cracked grain (%), maximum
5.0
Noise level, db(A), maximum
95.0*
The reel shall be adjustable horizontally and vertically to suit different crop
conditions such as height and density. The recommended reel speed should be ______% to ______%
faster than the ground speed.
25 %
50 %
The recommended peripheral speed of the threshing drum
20 m/s to 30 m/s.
Warranty against defective materials and workmanship shall be provided for parts and
services except for normal wear and tear of consumable maintenance parts such as belts
within _________ from the purchase of the rice combine.
six months
