Common faults of thresher and troubleshooting methods
1. Common faults and causes
(1) Degranulation is not clean
Mainly because the rotation speed of the drum is too low, the hobbing force is small, or the threshing gap is too large, and it cannot be completely knocked off by the teeth, resulting in uncleaning of the threshing. When the feed amount is too large, some of the kernels cannot be completely hit, and the crop grains are too moist, etc., and the kernels are easily removed.
(2) more broken kernels
Mainly because the rotation speed of the drum is too fast, exceeding the rated rotation speed; during the threshing process, the amount of feed crop is not uniform, and the time is fast and slow; the threshing gap is small, the grain is crushed and crushed; because the crop water content is large, the grain is wet, It is easy to cause grain breakage under mechanical impact.
(3) Separation is not clean
Mainly due to insufficient air volume or wrong wind direction, the threshing machine screen hole is damaged or the gap is too large, the grain is too wet, and it is not easy to blow off the weed stem.
(4) Roller blockage
Mainly because the speed of the threshing machine is too low, the amount of crops is too much, and the water content of the crop is high, or there is a hard object entering the machine. The drum belt is too loose after long time use, which may cause the drum to be clogged.
(5) There is an abnormal sound in the machine,
After a long period of work, the inside of the machine may be mixed with clumps, stones, grass, and other debris, which accumulate inside the machine, so that the machine can not work normally and produce abnormal noise.
(6) The clutch does not work normally and produces abnormal noise.
Due to the complicated structure and the installation of the clutch, the new type of thresher often has problems such as insufficient separation, slippage, or separation. The main reason may be that the nut is loose, or the limit button is off, or the main pulley is not on the same line as the drive shaft; the spring may lose its elastic force for a long time, and the clutch may not work properly due to falling off or oily.
(6) During the threshing process, no grain is released or the grain is discharged slowly, and the work efficiency is low.
The main reason is that the gears are not fully meshed and the drive pin is detached; the belt slack is slipped or the angle is too large, the blade wear is severe or deformed, and the crop water content is high.
(7) There is grain in the tuyere running out or clearing grain with more impurities
Because the wind is too large at the air outlet or the air inlet is close to the grain surface or the wind is small, or the distance between the air inlet and the grain surface is too far.
(8) The hydraulic cylinder fails to work. There are four possible reasons: 1) the hydraulic cylinder is damaged; 2) the reversing valve does not work; 3) the hydraulic oil content is low enough to generate pressure; 4) the hydraulic oil viscosity is too high.
2. Troubleshooting
(1) Reduce the rotation speed of the threshing machine drum. Generally, the motor speed of the thresher is carried out within the rated speed; the feed should be evenly fed during the operation, the feeding amount should not be too big or small, and the intermittent phenomenon cannot be produced; Moisture, when the water is large, the threshing gap should be increased, and if the crop grains are damp, it should be dried properly before degranulation.
(2) Increase the rotation speed as required; reduce the gap; dry the crops that are too humid.
(3) Within the rated speed, increase the speed appropriately; reduce the feeding amount to achieve a uniform and continuous feeding; stop the inspection to remove foreign matter, and properly adjust the roller belt.
(4) After abnormal noise, stop the debris removal; stop feeding the material and immediately idle until the abnormal sound disappears before continuing the threshing operation.
(5) Adjust the clutch. 1) Adjust the tie rod nut, adjust the rear clutch to be completely separated; 2) Reinstall; 3) Adjust the relative position of the power machine and the clutch so that the power machine pulley and the clutch drive wheel are in the same line; 4) Adjust the pressure spring to sufficient pressure; 5) Install the friction plate and remove the oil stain;
(6) Adjust the cone, the gap of the umbrella point, check whether the tapered tooth is off, reinstall the drive pin, adjust the belt, reduce the height, replace or correct the blade, and reduce the moisture content of the material.
(7) Adjusting the distance between the tuyere and the grain surface;
(8) Check the hydraulic cylinder and the reversing valve, add hydraulic oil and heat or replace the hydraulic oil.
