This paper analyzes the major indexes of agricultural machinery during the Nine-Five-Year Plan period by using the theory of GM system, and founds a GM (1,1) prediction model. The model has been proved fairly precise in test work and will be helpful in forecasting and planning in the principal machinery in the Ten-Five-Year Plan period.
A new transmission plan in which the ratchet reducer is more suitable for the speed reduce of the agricultural machinery is put forward, through the kinematics analysis of the basic elements in the device, the adjustable-speed method, the determined method of the structure of the crank and rocker, and the stress analysis are explained, Finally, by some examples, the superiority of the transmission plan in the cost, structure, size and adjustable-speed are displayed.
The fuel-ethanol is important energy sources in the world as energy sources and environment with latency crisis. All or part the gasoline is replaced by fuel-ethanol will be imperative under the situation for driving motor vehicles and farming machines in China.
Through the consideration of levying petroleum tax,the influence of it to development of Wuhan agri-cultural mechanization has been conferred in this paper,and the author has put forward relative proposal combin-ing analyzing the investigation of total year-consuming-petroleum to farm machinery in Wuhan.
Through analyzing agricultural factors market in China,the paper believes that under certain conditions,large scale mechanical farmland is not the requirement of scale of economy,and the author is against the idea of large scale mechanical farmland.
The most widely used method for modifying comentional bicycle transmission mechanism is to drive through a device that creates a nonuniform velocity during the cycle. The four bar linkage, cam, elliptical sprocket and universal joint can be used to accomplish this task. An elliptical sprocket has been designed, it generated a chain drive capable of providing a desired varying angular velocity of the driven shaft. The result from the optimization program have been obtained by using an elliptical sprocket, it...
The most widely used method for modifying comentional bicycle transmission mechanism is to drive through a device that creates a nonuniform velocity during the cycle. The four bar linkage, cam, elliptical sprocket and universal joint can be used to accomplish this task. An elliptical sprocket has been designed, it generated a chain drive capable of providing a desired varying angular velocity of the driven shaft. The result from the optimization program have been obtained by using an elliptical sprocket, it is possible to attain approximately 20% increase in average instantaneous power over what can be produced by a circular motion at the pedal.
Through the consideration of levying petroleum tax,the influence of it to development of Wuhan agri-cultural mechanization has been conferred in this paper,and the author has put forward relative proposal combin-ing analyzing the investigation of total year-consuming-petroleum to farm machinery in Wuhan.