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为减少全履带式再生稻收割机收获再生稻头季时行走底盘对留桩的碾压率(履带碾压面积与收割面积的比值),以利于提高再生季水稻产量、并改善再生季稻米品质,基于履带式车辆设计理论,以割幅Z、轨距B、履带接地长度L、履带宽度b、转向半径R0、底盘中心轴线与割台割刀纵向距离X为影响因素,建立了全履带式再生稻收割机行走底盘结构模型及其田间直行转弯碾压模型,以种植行距i,株距c,穴径br的水稻为对象,对上述各参数对碾压率的影响规律进行了分析,结果表明,其他参数相同条件下,直行时,碾压率δ1随割幅Z与履带宽度b的比值增加而减小;转弯时,全履带式再生稻收割机碾压率δ2随转向角度θ增大而减小,随转向半径R0的增大而减小;碾压率不受底盘中心轴线与割台割刀纵向距离X的影响;轨距B以及割幅Z与轨距B之差为行距和株距的公倍数时有利于减少碾压率;在相同接地比压条件下,割幅Z增加有利于减少碾压率。为减少碾压率,全履带式再生稻收割机结构设计时,在满足接地比压前提下,应减少履带宽度b和接地长度L,增大割幅Z,轨距B取行距和株距的公倍数,割幅Z与轨距B之差为行距和株距的最小公倍数,采用回转式行走路径;结合田块形状与面积,优先选用较大转向半径R0;在农艺上,建议水稻种植行距与株距有整数倍关系。
In order to reduce the rolling rate (the ratio of track crushing area to harvest area) of walking piles during the first harvest of ratooning rice reaped harvesters in the whole caterpillar re-harvesting rice harvesters, in order to improve the rice yield in the regeneration season and improve the rice quality in the regeneration season , Based on the theory of tracked vehicle design, the factors of influencing factors, such as cutting width Z, gauge B, length of track grounding L, track width b, turning radius R0, chassis center axis and cutting head cutter longitudinal distance X, The model of ramie harvester walking chassis and the straight-run rolling compaction model of the ratooning rice were studied. The effects of the above parameters on the compaction rate were studied by planting rice with row spacing i, plant spacing c and hole diameter br. , While the other parameters under the same conditions, when straight, the compaction rate δ1 decreases with the ratio of cutting width Z to track width b; when turning, the compaction rate δ2 of full-crawler ratoon harvester increases with turning angle θ Decreases with the increase of the turning radius R0 and decreases; the rolling rate is not affected by the longitudinal distance X between the central axis of the chassis and the cutting head cutter; the difference between the gauge B and the cutting width Z and the gauge B is the spacing and spacing The common multiple is conducive to reducing the rolling rate; Ground pressure under the same conditions, increased cutting width Z help reduce the rolling rate. In order to reduce the compaction rate, when designing the structure of a full tracked regenerative rice harvester, the crawler belt width b and ground contact length L should be reduced to increase the common multiples of cutting width Z, gauge distance B and spacing , The difference between the cutting width Z and the gauge distance B is the least common multiple of the row spacing and the spacing between the rows, and the rotary walking path is adopted; in combination with the shape and area of the block, the larger turning radius R0 is preferred; in agronomy, Integer times relationship.