The Study Of The 2BMF-4 Corn Seeder

This topic originates from the sub-topic of the national grain bumper science and technology project. Although majority areas of our country already realize the sowing mechanization, the quality of the present seeders can't satisfy the request of high production. Conservation tillage method is being adopted and extended gradually at the present time in northern arid and semi-arid regions of China as a effective method to solve those problems in crop production, like poor grain yield, limited utilization ratio of precipitation, serious soil erosion and low mechanization level. The quality of sowing seeds of the seeder affects crops' output directly as well as the agricultural product cost, therefore it is the modern agriculture urgent need that to develop the high grade sowing seeds machinery. However, one of the most important limitations to conservation tillage is qualified no-tillage planter, and the capability of anti-blocking is a key component affecting the performance of the planter. In this thesis, a new no-till planter operating well in heavy straw mulching condition are developed from the following aspects:In order to solve the problem that the no-till planters can not work well when the mulched straw is long and thick, especially in the double cropping area of Huabei Plain where the winter wheat gives a high yield, a new whole chopping anti-blocking mechanism was developed. It consists of a group of rotary blades, a narrow tine opener, a shear bar, a hood and a deflector. This mechanism have novelty configuration and inaugurate.A new no-till planter was developed. Compared with other no-till planters, it possesses higher anti-blocking organ and the capability of anti-blocking is very good. Two years farm experiment show that this machine can have a good work state when the mulched straw is more than 1kg/m~2.On the basis of force and kinematic analysis of smash knifves and sling process, ensure the parameters of the smash knifves. Found mathematic model of smash and sling process, educe the variable parameters which is effect on the landscape orientation distance of sling.Research the capability of furrow opener and press wheel in existence, ensure the type and other parameters of this machine.We have two years experiments after this machine was completed in Dafengying xiang of Shenzhou city. Aera of work about 25hm~2. Experiment indicates that the design has achieved the main aims. It is more appropriate to the definition of conservation tillage. The appraisal results indicate that every index of this machine is better than standard in law. Compared with planter in existence, this machine have favorable capability of anti-blocking, enhance work efficiency consumedly, dabase the cost, contributed to the increase production and income.