First, the main technical content

The direct return of wheat straw to the field is a technology that directly shreds and disperses the straw directly when the wheat is harvested. The wheat combine harvester with straw chopping and scattering function is used, or a special straw chopping and scattering device is equipped for the combined harvesting operation at the grass-grass outlet of the wheat combine harvester to complete the wheat cutting feed, detachment cleaning, and collection at one time. Containers, straw chopping and scattering operations.

The no-tillage looting and sowing technique is a technique in which crops are directly sown with no-tillage sowing machinery on a plot of land after wheat is harvested without ploughing the soil. The corn no-tillage planter was used to enter the ground once, and operations such as ditching, deep fertilization, sowing, earth covering, and suppression were completed.

Second, wheat straw chopped directly back to the technical points

(a) Select tools. In recent years, the wheat combine harvester has designed the straw chopper installation interface at the grass outlet. Choosing the straw chopper produced by the same production enterprise as the wheat combine harvester is preferred; the product with the “agricultural machinery promotion and appraisal certificate” is selected next to ensure product quality. The chopper selected matches the power of the combine harvester. From the experimental demonstration situation, the wheat combine harvester with an engine feed rate of 2 kg/s and more than 70 hp can be equipped with a straw chopper.

(B) Safe commissioning. After the straw chopper is installed, inspect the protective devices of the various departments. After the personnel are evacuated to the safe position, they shall be allowed to run for 10 to 20 minutes. Check whether the working parts are working well and whether the belt is tight. No problem, then load operation.

(c) Operational indicators. Wheat straw chopped length ≤ 15 cm, cut length pass rate ≥ 95%, disperse uneven rate ≤ 20%, missed cut rate ≤ 1.5%.

(d) Inspection and maintenance. Straw chopper speed and impact frequency is high, each shift (8 hours) to be maintained once, each movement parts plus lubricants, adjust the belt tension; every work 40 hours, should check the clearance of each moving parts, fasteners The degree of tightening shall be adjusted and repaired; after use, the inside and outside of the housing shall be removed, the belt shall be removed, and the inside of the housing shall be oiled for reuse in the coming year.

(E) pay attention to the workload. When the amount of straw is too high or the humidity is high, the harvesting speed should be reduced to ensure the effect of shredding.

(f) Safe use. During work, anyone is prohibited from following the chopper. The shredder guard cannot be dismantled or modified without permission; the rotating parts are not allowed to increase speed. When a shock or abnormal sound occurs, the machine should be stopped and checked immediately; during the inspection, the engine must be turned off and the key must be removed.

(7) Replace the blades in time. Blade wear or loss will cause the chopper to vibrate. The shredding quality will be reduced. Replace the blade with the same model and weight.

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