5. Roller nails or concave nails are bent or interrupted. Because the drum rotates at a high speed, the load is large, and the vibration is intense, the nail fixing nut is easy to loosen, and the normal flank clearance cannot be maintained while being bent or interrupted. After a nail has been broken, it will break other nails. When the nails are bent due to impact, they are easily broken or bent. If the roller enters a hard object (such as a stone or tool), it can easily cause the spike to bend or break. After the drum nails or the concave nail teeth are bent or broken, they will seriously affect the threshing quality, resulting in the phenomenon of unabated or fragmentation. Preventive methods: During the harvesting operation, hard mud blocks, stones, and other hard objects should be prevented from entering the drum; after maintenance and repairs are completed, tools should be strictly checked to prevent them from being thrown on the cutting table or in the feeding room; care should be taken during class maintenance. Check the fixing condition of the roller and the concave nails, and tighten the loose nuts; check whether the nails are bent or curved. If there is a slight lateral bending, correct the correction with the spike correction rods, and the bending of the roller spikes should be serious. Replace new nails. 6. The bending of the shaft of the rotating member and the bending and breaking of the shaft of the rotating member are serious failures of the combine. Causes: Rotating parts wrap around the grass, the impact force and resistance increase, the shaft is bent and not broken; the load of the rotating parts is too large, the torque of the shaft is increased, the shaft is broken; the shaft and sleeve clearance or shaft is worn due to wear And the bearing clearance is too large, the swing is large, the impact force is large, causing the shaft to bend and break; The high-speed drum and fan, due to unbalanced weight, make the shaft bent, broken; driver technology is not skilled (manipulate when fierce Adding accelerators, slamming clutches, driving at high speeds in uneven roads, etc., and improper inspections, adjustments, and maintenance (such as a serious lack of oil at bearings) will cause the shaft to bend and break. Preventive methods: When overhauling, attention should be paid to balancing the high-speed rotating parts; the bending axis should be straightened in time; the clearance between the shaft and the bearing should meet the technical requirements, and the work should be inspected and maintained in a timely manner. Problems should be repaired or replaced in time. Correctly operate the machine (do not add throttle, do not rush to engage the clutch, do not drive at high speed in uneven fields, etc.); when harvesting wet or excessively weedy crops, reduce the driving speed and lighten the load; regular check and clear the winding Grass and obstructions; correctly adjust the safety clutch so that it can ensure safety when the load is too large. 7. The belt is heavily worn or burned. Cause: The pulley on the same belt is not in the same plane; the belt is too loose and slippery. Preventive method: During installation, pay attention to the same belt drive circuit pulley in the same plane; operation, each shift should check and adjust the belt tightness; to avoid the new and old belts in the same drive circuit at the same time, the new replacement of the actual belt The length should be the same in order to prevent uneven belt tension and uneven transmission load to damage the belt. 8. Reasons for the breakage of the broken chain of the chain: The sprocket is not installed in the same plane of rotation and generates eccentric wear; after the chain is severely worn, it is still used; after the shaft is bent, the sprocket rotates; the chain is too loose or too tight; Broken, detached or reversed in the direction of the opening of the clip (when the opening should be turned in the opposite direction of rotation) will cause the chain to break. After the chain is broken, it will then spoil the sprocket, bend the shaft, and other parts. Preventive method: During installation, each sprocket on the same chain must be in the same plane of rotation; the worn chain must be repaired or updated in time; when the shaft is bent, it should be corrected; the tightness of the chain is properly adjusted; the chain that wear exceeds the limit Wheels should be repaired or updated in a timely manner; correctly adjust the safety clutch.
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