Airflow Field Finite Element Analysis Of Air-suction Seed Metering Device Of No-tillage Planter

Air-suction no-till planter achieves no-till planning, but also precision planting. Therefore, this study according to structural characteristics of air-suction seed metering device of no-tillage planter, using ANSYS software on air-suction seed metering device carried on airflow field finite element analysis and experimental research, the conclusion provide structure optimization and performance improvement reference of air-suction seed metering device of no-tillage planter.This paper mainly studied flow field of the distribution and seeding performance under the Conditions of different pass, Aperture and pore distribution, Found out best suction performance which the hole structure was the tapered hole, suckers aperture was 5.0mm, and diameter of suction hole was 150mm. Airflow field finite element analysis of air-suction seed metering device display: straight hole, chamfer hole, tapered hole,three hole diversification of inlet flow velocity is not very obvious; 3.2mm, 4.2mm, 5.0mm, three aperture of suction hole which the largest inlet air flow speed is 5.0 mm hole; 130mm, 140mm, 150mm suction holes distributed in three different diameter which the maximum inlet air flow average speed of the vacuum chamber is 150mm. Excitation and traditional seeding performance test results are: test results of changing suction hole structure showed that tapered hole's absorbing seed performance is best; the test results of changing pore size of the suction hole showed the 5.0mm aperture's absorption performance is best ; the test results of changing the distribution diameter of absorbing hole showed absorbing seed performance of the 150mm distribution diameter is best; while from the overall results of seeding performance can be obtained vibration test superior to the traditional test.