Combine harvesters can experience various clogging issues during operation, which can significantly affect performance and efficiency. These problems generally fall into several key categories:
1. **Knife Clogging Failure**
a. **Causes**: Operators often fail to adjust the cutting speed properly before entering the field, leading to insufficient throttle and immediate blockage of the knife. Additionally, not raising the header in time when crossing fields can cause the knife to get stuck on stones or mud.
b. **Preventive Measures**: Increase the engine throttle before entering the cutting area to ensure the knife operates at full speed. Raise the header promptly when moving between fields and clear any blockages immediately. Keep the knife sharp and replace it when worn. Ensure the knife clearance is less than 0.5mm for optimal performance.
2. **Header Jamming Failure**
a. **Causes**: Improper adjustment of the header auger can create excessive gaps between the auger and base plates, leading to blockages. Mismatched reel speed or height can also create a "dead zone" where crops accumulate. Poor coordination between the cutter and pull-out wheel may result in crop buildup at the front of the header.
b. **Preventive Measures**: Adjust the header and agitate position regularly. Repair or replace worn auger blades to maintain proper gap. Properly adjust the reel speed and height according to crop density and harvester speed. Avoid harvesting overly wet crops. When dealing with fallen crops, reduce cutting width and slow down the machine. Monitor the system closely and clear blockages as needed. Maintain tension in the abutment chain and other conveyor components. If they become loose or worn, adjust or replace them promptly. Never force the machine through a blockage by increasing throttle, as this can damage internal components.
3. **Conveyor Blockage Fault**
A large amount of feed can lead to blockage in the trough even if the header is clear. If grass starts to turn in the head of the cutting station, stop the machine and let it run for a while to clear the issue before continuing. Loose conveyor belts or power transmission belts can also cause blockages. Check the tightness of the conveyor belt rakes regularly. If the rake teeth loosen, grain distribution becomes uneven, causing further blockage. In severe cases, loose rake teeth may enter the threshing unit, potentially damaging the threshing mechanism and breaking the top nails.
4. **Roller Jamming Failure**
a. **Causes**: Insufficient throttle can prevent the drum from overcoming threshing resistance. Operating at too high a speed may overload the machine, leading to blockage. Belt slippage due to wear, looseness, oil contamination, or improper tensioning is common. Clutch slippage caused by dirty friction plates, worn components, or incorrect clearance can also be a factor. Incorrect roller speed settings and improper concave plate clearance are additional causes. If the upper and lower bars of the draft are improperly adjusted, the roller may become blocked due to a small gap. There should be a 5–15 mm clearance between the upper grid and the draft wheel cylinder, and about 30 mm between the lower grid and the draft wheel tip. Improper installation of the upper grid can cause the roller blade to scrape straw, while incorrect positioning of the lower grid may prevent smooth straw movement, leading to blockage. Failure to clear the concave plate after it becomes clogged can gradually reduce the gap between the roller and the plate, eventually causing a complete blockage.
b. **Prevention and Solutions**: Adjust the drum speed based on crop type and growth conditions, and match the forward speed accordingly. Correct the gap between the roller and the concave plate. Maintain medium to high throttle during operation to minimize blockage risk. When harvesting fallen crops, control the machine speed and use the header lift handle to ensure even feeding. Prevent clutch and belt slippage by regular maintenance and inspection.
5. **Recombiner Blockage Fault**
The stripper's role is to re-thresh unspilled spikes that pass through the tail screen and return them to the cleaning screen for further processing. If the tail screen opening is too large, more broken stalks will enter the stripper, leading to blockage. If the recombiner becomes blocked, stop the machine and adjust the tail screen opening appropriately to restore normal operation.
Waterproof Solar Camera,Smart Light Security Outdoor Camera,Smart Outdoor Camera,Outdoor Wifi Wireless Cameras
Shenzhen Zuomi Technology Co., Ltd. , https://www.bkvis.com