浅析影响拖拉机集材效率的因素

伐区木材生产工序中,集材工序是一个重要环节,它不仅关系到伐区未材生产效率的高低,也关系到伐区木材成本的高低。因此,在组织伐区木材生产时,把集材工序搞好,至关重要本。文在深入林区生产第一线调查的基础上,参考借鉴了发达国家林业生产经验,在定性定量的基础上,分析了影响集材工序的主要因素:林份特征、地形条件、气象等自然因素;机械设备、劳动者、生产组织、劳动组织等社会技术因素,提出了一些新的见解。

大兴安岭地区影响集材效率因素的探讨

本文从客观到主观分析了影响集材效率的因素、主观因素要注重人员配备、劳动工资、合理载量、集材时间、人员技术素质等各方面合理安排,集材效率的提高是生产过程中关键的环节。

采用地形指数法选设高山冻板道的探讨

本文说明了利用地形指数法选设高山冻板道的具体方法.实践证明,此种方法是缩短集材距离.降低生产成本的一种有效方法.

伐区木材月生产量合理安排的研究

通过对伐区木材月产量影响因素的分析，提出了确定月产量的原则和方法．其步骤是首先确定生产月份的优先级，然后统计出与月产量有关的基础数据，再通过公式计算出月产量及生产的月份．这样，安排产量可避免把产量安排在道路条件最差的季节．从而达到降低生产成本，减轻对森林地面破坏的目的。

Study on Collecting Efficiency of Lube-oil Filtration Media

We made an experimental study and analysis on the relationships between filtration collecting efficiency and porosity, fiber diameter, and particles diameters for differential porosity media when fibrous media collecting lube-oil. The influencing extent of porosity, dust concentration, and velocity impacting on collecting efficiency were researched by orthogonal experimental test. The results showed that porosity had the best salience affection on collecting efficiency, and the affection of velocity and dust concentration was less. The main factors of impacting on collecting efficiency were porosity, fiber diameter, particles diameter, dust concentration, filtration time and filtration velocity. The correlation formula between collecting efficiency and porosity, aperture diameter, fiber diameter, particles diameter, the thickness of media, and filtration time was obtained. It can forecast the collecting efficiency of lube-oil filtration media and provide a guide for selecting suitable fibrous filtration media.