Design and Experiment of 4YQZ-3A Combine
Harvester for Corn
Zhang Xirui Dong Youfu Zhang Daolin
(School of Mechanics and Electrics Engineering Hainan University Danzhou, China zhangxirui_)
Abstract—Due to the problem of the low retrieving rate of straw while harvesting, fodder went sort in stock raising and to overcome the practical problem of corn harvester reaping both corn stalk and spike while in operation, 4YQZ-3A combine harvester was designed, analyzed and the parameters of key components were pointed out for better gripping delivery mechanism, vertical picking and chopping cutter, helicinae and throwing apparatus.During the corn harvesting ason, numerous performance testing and the production asssment were carried out in the field. Results achieved from the experiment indicate that the whole machine has better performance and can accomplish reaping both corn stalk and spike well.
Keywords- corn harvester; picking and threshing harvester; design; Experiment
1.introduction
Corn is China's cond-largest food crop, occupies an important position in food production[1]. Maize straw contains a lot of crude protein, crude fat and fiber nutrient component, etc. Thus it is one of the most perfect forage of high quality in animal husbandry.The national annual production of corn straw is about 60,000 tons, which is a huge potential forage source [4].Corn harvester reaping both corn stalk and spike can complete the harvest of corn ear and stalks within one time, so it has significant economic, social and eco- system efficiency [5-6]. At prent, corn harvester reaping both corn stalk and spike still develops very slow, and the domestic model mainly are hanging type. Becau of underpowered, low production efficiency and straw cleanness, it has not been rapidly promoted [7-8].Foreign models are mainly Ukrainian KCKY-6 Corn harvest machine and Corn Star ries united harvest machine developed by Kempe Co. in German, due to untidy stubble height and higher price, this type of air-craft is not suitable for China's national conditions [9-11].
Foundation item: Public beneficial(agriculture)Science rearch fund issue(200903059-04)
On the basis of the "tenth-five" national rearch tackle key problems in science and technology rearch, in this article 4YQZ-3A combine harvester was designed, which combines existing corn harvest and corn silage mechanization technique and improves the design and optimizes the combination for each working device. During the of harvest corn ear, the 4YQZ-3A combine harvester can also complete cutting, conveying, chopping collection and root crop broken tasks and so on; With the popularization and appli-cation of this technique , we can solve the problem of corn straw recovery and reduce the waste of straw resources and improve the environment and soil pollution caud by straw burning. There into, the straw recovery can provide high quality feed for livestock and reduce the excessive dependence on pasture, so this technique has important practical significance to our country's increasingly developing animal husbandry and related industries.
2. Overall Institutions and Main Technical Indicators
2.1. Whole Structure and Work Principle
As shown in figure 1, 4YQZ-3A combine harvester for corn is mainly made up of gripping delivery mechanism, spike picking device, stem shredding mechanism, cast cylinder, spike collecting box, stem crushing box, counters-field device and helicinae and delivery apparatus of stalks, etc. This machine can once completed the picking, rising and transportation, tting into the box, stalks cutting, conveying, chopping, throwing and collection and root crop crushing of corn grain. While the machinesk is operating, nearside divider subdivided maize plants, reciprocating cutter cut the plants, clamping chain clamps maize plants of which root is sundered and then convey them to vertical spike-picking roller to pick off the ear, the corn ear are conveyed to the spike collecting box by the delivery mechanism; Stalks are chopped by vertical hob behind the stem pulling roller , and then are casted by casting device to stem crushing box; and corn root are broken by counters-field device.与女同事
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2.2. Technology Index of the Machine
According to the requirements of the chopping and ensiling craft of the corn stalks and the function characteristics of the prototype requirements, The main technical parameters are determined as is shown in Table 1.
Table 1. The main technical parameters of 4YQZ-3A combine harvester
Parameters | Numerical value | Parameters | Numerical value |
Boundary dimension (length×width×height)/mm | 7100×2500×3600 | Minimum ground clearance/mmdnp是什么意思 | 210 |
Entire machine weight/kg | 5090 | Revolving speed of spike Picking roller/r•min-1 | 1080 |
Mating Power/kW | 88.2 | 莎丽服Revolving speed of Stalkschopping machine/r•min-1 | 2100 |
Number of Harvest rows/row | gre考试间隔时间>novellus3 | Forward speed of the havester/km•h-1 | 1.3~3.5 |
Adapted line spacing/mm旅游英语 | 500~800 | Theoretical productivity/ 圣诞玫瑰影评hm2•h-1 | 0.638 |
| | 英文字母排列顺序 | |
Figure 1.4YQZ - 3 of maize united harvest machine structure schematic drawinggotten
