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合理确定集材拖拉机的限制坡度,是充分发挥拖拉机效率,保证人身、机械安全的重要措施。影响限制坡度的因素很多,现就几个主要因素分析J-50拖拉机的限制坡度值。拖拉机爬坡时的自重力G可分解为垂直坡面的正压力F_正和平行坡面的下滑力F_滑,即: F_正=G·cosα=6500cosαF_滑=G·sinα=6500sinα履带与地面附着力: F_附=μ·F_正μ为附着系数,冬季为0.35-0.45;夏季为0.6-0.7。为获得极限值,冬季取0.45,则F_附=0.45·F_正
It is an important measure to make full use of tractor efficiency and ensure personal and mechanical safety by reasonably determining the limit grade of tractor. There are many factors that affect the grade limit, and the J-50 tractor limit value is now analyzed for several major factors. Self-gravity of tractor when climbing G can be decomposed into a positive pressure on the vertical slope F_ and sliding force parallel sliding surface slip F_, that is: F_ = G · cos α = 6500cosαF_ slip = G · sinα = 6500sinα track With the ground adhesion: F_ attached = μ F_ is μ as the adhesion coefficient, winter 0.35-0.45; summer 0.6-0.7. To obtain the limit value, take winter 0.45, then F_ attached = 0.45 · F_ positive