Combine harvester operating environment is poor, improper use, the trough will often be blocked, the light causes the loss of grain and reduce the production efficiency, and seriously damage the drive belt and even the trough the drive shaft fracture. The causes and solutions for the blockage of the 4L-140 combine harvester trough are described below. First, speed, 1, the trough drive shaft speed. The speed of the drive shaft directly determines the speed of the conveyor belt. The speed is too high, the mechanical vibration is large, and the service life of the machine tool is reduced. When the speed is too low, it will cause plugging when it is less than the line speed of the auger blade of the header. Especially when the feeding amount is large, if the yield is high, the harvesting speed is fast, and the moisture content of the crop straw is large, the grass-grain ratio greater than 1.5 is more likely to cause clogging. Therefore, the speed of the drive shaft should be adjusted according to the conditions of harvesting crops, and the linear speed of the drive shaft is normally 1.2-1.5 m/s. 2, the header agitating speed. The main function of the auger of the header is to transport the crop that is placed on the header in front of the header after cutting, to the conveying slot through the blade, and then fed into the trough by the auger telescopic rod. If the auger's line speed exceeds the line speed of the conveyor belt conveyor, the conveyor tank will clog when the auger is fully loaded. Of course, the auger's line speed should not be too small, otherwise it will easily cause agitation and clogging the feed and the amount of feeding will be large and small, resulting in unclean threshing and unclear separation. Therefore, the rotation speed of the auger of the header is generally less than 10-15% of the speed of the active pulley of the conveyor, and the linear speed of the harvester is generally 1.05-1.30 m/s. 3, reel speed. The role of the reeling wheel is first to set the crop to tilt backwards, secondly to support the crop to facilitate cutting, and finally to place the cut crop flat on the header. If the reel speed is too fast and does not coordinate with the harvesting speed, crops may be continuously hit and brushed by the spring pinion shaft during harvest, resulting in grain shedding and loss. If the reel speed is too low and the spring pinion moves downwards, the crop to be cut will be thrust forward by the springs between the header and the cutter, which is not conducive to the normal cutting of the crop by the cutter. In addition, the cut crops will be scattered in front of the cutting table or piled up on the cutter and cannot be promptly transported by the auger. When the accumulation reaches a certain degree, some crops will enter the edge of the auger blade and be fed into the telescopic rod by the auger. Increase the amount of instant feed, resulting in blockage of the trough. Therefore, the reel speed should be adjusted according to the harvesting speed. The normal revolving speed is generally 30-40 rpm. Second, the gap and spacing aspects 1, conveying molar teeth spacing. Too few conveyor picks in the conveyor can affect the delivery efficiency and cause clogging. In this case, the teeth can be added to the conveyor belt so that the distance between them is no more than 250-300 mm. 2, the gap between the conveyor belt rake teeth and the floor. The tension of the conveyor belt and the clearance between the dents and the floor directly affect the conveying effect. The conveyor belt is too tight, the clearance between the rake teeth and the floor is too large, and the crops entering the tank from the slots are reduced by the force of the caries, and the bottom crop only moves by the other crop lanyards. The transportation is not complete and takes a long time. The accumulation of crops at the bottom of the tank increased, and the passive wheels floated. When the floats rise to a certain limit, the congested crops start to squeeze into the trough from the middle of the two conveyor belts, causing plugging. At this point, the left and right tightening screws should be turned down and loosened. However, it cannot be adjusted too loosely or too lowly. Otherwise, not only will the transport picks hit the floor, but the conveyor belt will slip when the load increases, causing the line speed to decrease and the transport efficiency to decrease. This also causes plugging. It can be seen that if the conveyor belt is too tight, too loose, too high, or too low, it will cause blockages. Only the distance between the rake teeth and the floor is adjusted to 2-5 mm, and the outer edge of the driven wheel is between the rake teeth and the floor of the notch. When the gap is 50-60 mm, the best effect. If necessary, shorten the conveyor belt. 3, conveyor belt spacing. When the conveyor belt is in normal operation, there is very little leakage of crops between the two belts. When the distance between the two belts is large, the crop at the bottom of the trough is squeezed into the middle of the two belts, causing blockage. However, the spacing should not be too small, because the width of the tank body is fixed. If the distance between the two tanks is too small, the clearances on both sides will increase, and it will easily cause plugging. The distance between the two belts is generally controlled to 60-80 mm. 4, the distance between the telescopic rod and the header plate. The telescopic rod must ensure that the amount of protrusion at the slot position under the action of the crankshaft in the header auger is 0 to prevent the crops transported by the auger from being brought back to form the reverted grass; In general, the distance from the bottom plate of the header should be 15-20mm. It can be reduced to 10-15mm under low output and 20-30mm under high output. If the distance from the bottom is too small, the bottom plate of the header can be damaged. If the size is too large, the amount of feeding is large and small, and the feed trough is finally blocked. Third, other aspects 1, pull the front and rear wheel position. If the cutting is higher, the cut part is shorter, the spring and the spring pin have left the crop when the crop does not reach the rotating space of the fan blade, and the crop will accumulate on the bottom plate of the header, resulting in uneven feeding, resulting in conveying Slot clogging. At this point, the pull-out wheel should be adjusted backwards. 2. The consistency of the tightness of the conveyor belt. The tightness of the two conveyor belts should be the same, otherwise the conveyor belt will deviate and form a wheel-climbing phenomenon, which eventually leads to the blockage of the conveying trough.
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