The Analysis of The Dynamic Characteristics on Seed Plate of The Vacuum Planters for Precision Sowing

Abstract:

This study was carried out to analyze the dynamic characteristics of the seed plate which is the main part of the vacuum precision planter. The vacuum precision planter is a working machine which is attached to a tractor. The vacuum pump is operated by PTO-shaft which rotates in three types; 540 rpm (9 Hz), 750 rpm(12.5 Hz) and 1,000 rpm(16 Hz). Seeds are sucked into the holes of the seed plate by vacuum, and then they are transported by rotation. At that time, the mode shape of seed plate is important because dynamic characteristics of the seed plate decide seeding rates. If the natural frequency of seed plate corresponds with the frequency of PTO-shaft, the resonance occurs. For this reason, modal analysis of the seed plate was made with FlexPDE(PDE solutions, inc) and ANSYS(ANSYS, inc). Mode shape was observed for 5th mode. First, modal analysis of the seed plate was performed by FlexPDE. According to the result of FlexPDE, natural frequency of each mode was obtained 35.7 Hz, 35.8 Hz, 45.3 Hz, 60.8 Hz and 61.0 Hz respectively. The other modal analysis of the seed plate was performed by ANSYS. As a result of the ANSYS analysis, natural frequency of each mode was obtained 35.6 Hz, 36.0 Hz, 45.6 Hz, 60.9 Hz and 61.1 Hz respectively. The results of the FlexPDE and ANSYS were similar. Natural frequency of the seed plate was confirmed by the above results. So, it was confirmed that the resonance didn't happen by comparing the frequency of PTO-shaft and natural frequency of seed plate. In conclusion, the vacuum precision planter is expected to efficiently sow.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 968-972
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.968
• Online since: January 2013
• Authors: Jae Wan Lee, Young Joo Kim, Seong Il Kang, Joon Yong Kim, Dong Pyo Hong
• Keywords: Dynamic Characteristic, Mode Shape, Natural Frequency, Resonance, Seed Plate

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