Convenient operation, sufficient power, low fuel consumption, only 4-5 yuan per mu oil fee. The performance is stable, the total loss rate is less than 2.5%, which is 1 percentage point lower than that of the full feed harvester. Cutting height can be controlled within 3-15 centimeters, which is conducive to harvesting rice in paddy fields. The crushing rate of rice is significantly reduced: full feed harvesters â‰¤ 2%, half feed harvesters â‰¤ 0.5%. At present, the combine harvester is divided according to the grain feeding mode, and can be divided into two types, full feed and half feed. The semi-feeding harvester has high work efficiency, good field passability, and clean grain collection. Currently, it has been widely used in Japan, Europe and the United States, Taiwan and other developed countries and regions, and completely replaced the full feed harvester. In China, with the increasingly fierce market competition, some full-feeding harvesters with relatively backward technology and high harvesting loss rate have been withdrawn from the market successively. Instead, they are semi-feeding harvesters with advanced technology, convenient operation, and low loss rate. . In addition, the stateâ€™s increasing investment in modern agricultural production, the continuous increase in the prices of agricultural products, and the increase in the price of harvesting, the purchase of harvesters has become the best choice for agricultural users, and some farmers have taken money to the factory to purchase in line, especially to compete Half-feed harvesters are purchased, and the sales situation of the full-feed harvester is difficult. The main reason for the current phenomenon is that there is a big difference in performance between the half-feed harvester and the full-feed harvester. First, the engine performance Most of the current half-feeding harvesters use imported diesel engines, reliable quality, adequate power, relatively low fuel consumption, oil costs between 4-5 yuan per mu. The whole feed harvester generally chooses domestic engines, which have high power matching, large power loss, relatively high fuel consumption, and oil costs of between 8 and 10 yuan per mu. If we count only 40 acres per machine per day, the half-feed harvester can save 160-200 yuan per day. Second, the scientific and technological content production Half-feed harvesters mostly use electromechanical integration technology (such as the Colia -1480 half-feeding harvester adopts microcomputer control technology). The use of hydraulic continuously variable transmission system, high reliability and safety performance. Steering hydraulically, single-handle operation, easy operation, saving time and effort. Alarm sensors are installed on all key components, which can be used for alarm shutdown in case of emergency. The degree of automation is high. Colia- 1480 is equipped with an engine load detection device that can detect the engine load at any time, so as to ensure that the engine works in the best condition and prolongs the service life of the engine. The full feed harvester has a relatively low technological content, generally adopts mechanical operation, and has low reliability and safety performance. The steering is operated with double handles or steering wheels. The sensitivity is not high, the steering is difficult, the operation is laborious, and the operator is increased. The intensity of labor often occurs during the operation, which affects the working efficiency and the service life of the machine. Third, the threshing method Half-feeding harvester only threshes the grain of the ear, and generally uses double-grain cylinder, reducing threshing method, threshing clean, strong processing capacity, less waste, strong wet off performance, and low power consumption. The whole feed harvester must smash all the straw, and complete the harvesting, threshing, separation, cleaning and returning of the stems at one time. The processing capacity is weak and wasteful. Fourth, the total loss rate 1, the total loss rate: full feed harvester â‰¤ 3.5%, half-feeding harvester â‰¤ 2.5%. 2, broken rate: full feed harvester â‰¤ 2%, half-feeding harvester â‰¤ 0.5%. 3. Cutting height range: The whole feeding harvester is within the range of 10-20 cm, while the half-feeding harvester can be controlled within the range of 3-15 cm to facilitate the harvesting of lodging rice. Fifth, the ground than the pressure half-feeding harvesters are tracked walking, grounding area is larger, the ground pressure is lower, can adapt to wet rotten field operations. The full-feeding harvester generally adopts a wheeled structure. The grounding area is small, and the grounding pressure is relatively high, and it is easy to sink on relatively wet and rotted fields and cannot be operated. Six, straw processing Half-feeding harvesters generally have three ways to deal with straw: 1 cut into 5-10 cm long grass segment; 2 sets of grass into a pile; 3 tile. All three methods can meet the farmers' requirements for different utilization of straw. In addition, straw that grows well can be sold without cutting, increasing farmers' income. After feeding the whole harvester into threshing, the straw is chopped and thrown back to the field and cannot be sold. 7. Other aspects Half-feed harvesters are superior to full-feed combine harvesters in the ability to harvest lodging crops. Half-feeding harvesters can keep rakes low, while full feed harvesters tend to stay high. Half-feeding harvesters have a relatively low impurity rate for harvested rice, which is beneficial for feeding to dryers for drying. Through the above performance comparison, half-feeding harvesting is significantly better than full feed. In Guangdong, Jiangxi and Hunan where double-cropping rice is planted, it is ideal to choose a half-feeding harvester. At present, full feed harvesters have not been accepted and are gradually withdrawing from the market.
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