| The dry technical application has the extremely glorious history in our country. Using each dry method to dry the gain suitably can guarantee the grain does not mildew. This article introduced this research's topic background firstly. Through discussing the grain dry technology development history of our country, analyzed the present mainstream grain dry equipment, elaborated the type of Chinese mainstream grain dry machine, introduced the present development situations of each grain dry machine in development, research and application, and discussed our country's grain dry equipment's research method and the trend of development.Secondly, the research object of this article is using the hot blast greenhouse dry technology, sending the hot blast into the drying chamber by the axial flow fans, and then achieves the dry grain the goal. In this process, using the frequency changer to control the fans'rotational speed. Through the intelligent warm and humidity examine system, controling by the procedure monolithic integrated circuit, realizing the frequency conversion electrical machinery control the axial flow fans. Automatically control the needing hot blast,. Thus realized the intelligent dry.This article's main research content have following several:â‘ . Summarizes the performance parameter of axial flow fans, and simulates the hot flow field of the fans'leaf blade by using the ANSYS software.â‘¡. Adopting the large-scale finite element analysis software ANSYS's FLOTRAN module to carry on to analysis the flow field of dry greenhouse which under the mechanical ventilation, thus obtain the distributed information of air flow in the computation area.â‘¢. Outlines the frequency changer's velocity modulation control principle and choose the suitable frequency changer which we need . |
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