The thresher has the advantage of being easy to use and efficient, and therefore, the current usage rate is high. But the thresher will also have a series of problems. The following are several cases of poor threshing that occur in the threshing machine during use. Analyze the causes of various situations and attach the repair methods. for reference.
First, the threshing is not clean
Cause: The feed amount is too large or the feed is uneven; there is too much threshing gap between the groove and the concave plate; the rotation speed of the drum is too low; the grain is too moist.
Repair method: 1. Reduce the feed amount and feed evenly. 2. Correctly adjust the threshing gap, and the parts with serious wear should be replaced in time. 3. The pulley of the power machine should be properly matched with the pulley of the thresher. If the pulley is slippery, the tensioner should be adjusted to tighten the belt. 4. The straw-wet grain should be properly ventilated, air-dried and then threshed.
Second, poor grain cleanliness
Reason: The fan air volume is insufficient, most of the fan is too loose, the belt drive slips, causing the fan speed to fail to reach the design index, or the pulley pulley is loosened, the pulley is idling, and the fan rotation cannot be normally driven; the crop stem in the drum The amount of stalk entering is too much.
Adjustment method: 1. Check the tension of the fan drive belt. If it is too loose, adjust the tensioner properly and tighten the pulley to an appropriate level. If the fan pulley fixing screw is loose, tighten it. 2. Reduce the amount of feed or properly feed the gap.
Third, the blockage is serious
Reason: The grain is too wet, the feeding amount is too large; the rotation speed of the drum is too low; the roller rod is damaged to cause entanglement; the concave plate is seriously worn or damaged; the feeding chain is loose or the gap between the clamps is too large, causing excessive roller pumping .
Adjustment method: 1. Appropriately reduce the feed amount and keep the feed even. 2. Check if the power is sufficient or if the voltage is too low and the power is reasonable. At the same time, it is also necessary to check the tension of the power transmission belt, whether the pulley is slipped or not. 3. If the roller bar is damaged, it should be repaired in time. 4. Repair or replace the concave plate. 5. Adjust the tension of the feed chain, and also check the tension of the suction fan belt and the fan speed.
Fourth, too much grain breakage
Cause: The threshing gap is too small or the drum speed is too high; the feed is not uniform or the grain is too dry and too wet.
Adjustment method: 1. Check whether the threshing gap is correct. Generally, the minimum gap of wheat threshing should not be less than 4 mm. In addition, it is necessary to check whether the matching between the roller pulley and the power pulley is reasonable and accurate. If it is not appropriate, it should be adjusted or replaced. 2. Try to ensure that the feed is even, the grain is dry and fed, and the humidity is small.
5. Excessive kernels discharged from the dust outlet
Cause: The exhaust air volume is too large; the concave plate holes are blocked.
Repair method: 1. First check whether the fan speed meets the requirements. If it does not meet the adjustment, check whether the fan pulley diameter is properly selected. 2. Stop and power off to clear the blockage of the concave plate hole.
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