怎样挑选脱粒机

<正> 1 先检查整机外表,外表要无明显疤痕,焊缝应平整光滑,油漆的色泽要求一致,均匀美观。 2 传动皮带应符合规格,传动部位应有防护罩;传动部位上,应标有额定转速和传动方向符号。 3 检查滚筒与机架的侧壁间隙。互相之间的侧壁距离应均匀,其最小间隙应大于3毫米。 4 对滚筒进行检查。滚筒应转动自如,无阻滞、卡擦、碰情况。用手抓住滚筒,沿轴向推拉几下,不应有过大的轴向跳动。再转动滚筒,待滚筒停止转动后,用粉笔做一个记号,如此反复多     

The Ecological Effects of Young Elm Trees Belt-Pumpkin Strip Intercropping System at the Agro-Pastoral Ecotone in Northern China

Young elm trees belt-pumpkin strip intercropping was studied to solve the actual problem of resource losses in the large barren area resulted from reconverting cultivated land into forest in the agro-pastoral ecotone in northern China. The final objective was to realize effective utilization of the barren land with both ecological improvement and economic development. Field experiments were conducted together with laboratory analysis. The results indicated that the soil moisture level was remarkably increased in young elm trees belt-pumpkin strip intereropping because the pumpkin vines covered the gap between pumpkin planting-furrow and elm trees belt. The water use efficiency of the intercropping system was increased by 23.7-163.3% as compared with the single cropping. Elm trees belt-pumpkin strip intercropping changed the sequential succession trend of the grasses growing in the gap of the pumpkin planting-furrow. The annual grasses become the dominant vegetation. The nutritive value as fodder and yield of the annual grasses were also increased remarkably. The biomass of pumpkin, elm trees and grasses under intercropping increased by 24.4, 28.4 and 144.4%, respectively, as compared with those under single cropping. The land use efficiency was increased by 132%. It was also indicated that the soil erosion from the intercropping land was not increased due to pumpkin plantation. The differences in the soil erosion among intercropped area, elm trees belt and pumpkin strip with single cropping were not remarkable. Therefore, it was concluded that young elm trees belt-pumpkin strip intercropping is an effective way to utilize the barren land between the young elm trees belt and realize synergistic enhancement of ecological benefit and economic profit.     

拖拉机怕油部位

拖拉机的以下几个部位非常怕油,日常使用过程中注意避免油污。1.轮胎、三角传动皮带、水管接头等橡胶制品怕机油、黄油、柴油,尤其怕汽油。一旦与这些油类接触,就会很快老化。2.干式离合器的各个摩擦片不可沾油,需清洁干燥,以便在弹簧的     

二氧化碳测定仪

由安徽正远包装科技有限公司研制生产的VFSH560型盒式袋包装机组,由盒式包装JOE、螺旋计量机、提升机、皮带输送机、重量选别机等组成,使用进口伺服电机走膜、触摸屏界面、提升式上袋及充填系统,具有操作简便、     

皮带秤长期稳定性研究

目前,电子皮带秤在国内应用非常广泛,主要应用在工艺过程控制、多物料动态连续配比控制、散装物料商贸结算计量等方面,但使用效果都不尽如人意。电子皮带秤校准时挺准但用一段时间又不准了,为什么呢?这与皮带秤的稳定性有关系,皮带秤是动态秤,皮带秤无法长期保持稳定。     

一种桌面级车床教具的创新设计

桌面级车床教具可实现简易皮带张紧装置的圆带传动,刀架的三轴调节,系统的无级调速,尾座和卡盘的同轴度调整.本项目设计的车床教具,其主轴具有一定的变速范围,主轴组件有足够的抗震性,结构紧凑,操纵灵活可靠,成本低,工艺性好,能够有效地展示车床的主要结构和加工过程,达到提高学生学习效果的目的.     

宽幅传送平带关键技术的研究

针对人造板生产设备上宽幅平皮带的纠偏问题进行理论研究,并得出纠偏条件.同时对得到的结论进行实践验证.     

大型皮带运输机软启动装置设计与性能研究

目前大型皮带运输机在多领域发展中有着广泛的应用,而且取得了理想的应用效果.但是在实际应用中发现,该设备发生故障问题的风险非常高,加大了使用单位的维修工作任务量,造成了一定的经济损失,所以要加强软启动技术的应用,借助软启动设计提升大型皮带运输机设备的应用效果,降低故障发生率.基于此,本文对大型皮带运输机的应用情况进行了概...     

自动包丝机在吉林化纤长丝五纺车间的应用

文章总结了自动包丝机的主要构成、作用及价值,并对生产中存在的问题进行了剖析。