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

Type 9HS-170 yellow corn forage harvester was designed and the overall structure and working principle of the machine was elaborated. The roller device and toss blower which were the core components of machine was analyzed. Trajectory of any point in circular arc section of work of moving blade was trochoidal, through the analysis of the theory of roller device. According to the mechanical properties of corn stalk, the corn stalk could be cut off to be suitable for livestock to chew in cases with fixed blade to cooperate and linear velocity of moving blade of 38.6 m/s. Moreover, peripheral speed of blade terminal was 35.7～42.8 m/s and there was secondary flow in toss tube, through numerical simulation and analysis of the air flow field of toss device by using the software of Fluent. Overall, the design of toss device was reasonable. The field experiment was conducted. The results showed that safety performance and operation performance of type 9HS-170 yellow corn forage harvester were good. The average productivity of machine was 0.7 hm2/h. The average loss rate was 2.8%. The stubble height was 87 mm. The bearing temperature rise was 7℃.