ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

According to the principle of vibrating feeder,this paper proposed a method to achieve directional transportation for corn seed. It explored the relationship between the various postures of the change process and mechanical parameters during orientation. A directional vibration test device was established by kinetic analysis while the Zheng Dan 958 corn seed was taken as the research object. The orthogonal experiment was carried out with the factors affecting the rate of directional orientation such as step height A, inclination angle of track surface B, vibration amplitude C and vibration frequency D. The test results showed that the step height A and the inclination angle of track surface B and its interaction had extremely significant effect on seed orientation. The best test combination was determined by multiple comparison analysis. The result of the forward motion directional rate from repeating ten times was 93.5% and the reverse motion directional rate was 89.4% when the altitude difference was 4mm, inclination angle was 4°, vibration frequency was 51.5Hz, and vibration amplitude was 0.18mm. The high speed photography was applied on the observation and verification for the direct and reverse motion test result, the analysis result showed that the actual state of motion was in keeping with the theoretical analysis basically.