穴播穴灌坐水播种机水路系统的结构优化

针对当前坐水播种机具存在的结构复杂、种液播施难同位等问题,提出了“开沟-种、液同时播施-覆土-镇压”的机械作业新工艺,在此基础上设计了新型穴播穴灌坐水播种机水路系统.以该水路系统关键部件水阀为例,建立了其设计参数的数学模型,利用惩罚函数法和Matlab提供的优化函数对模型参数进行求解.优化结果为：水阀出口内径为2.5 cm,阀芯头部厚度为0.7 cm,阀芯上下运动行程为1.9 cm,阀芯头部上下端面直径分别为3.0和6.1 cm;室内样机试验测得的水阀局部水头损失系数为2.08.该方法适用于水路系统其他部件参数的优化设计.

Structural optimization of waterway system of irrigating-sowing machine

A new seeding technique of irrigating-sowing machine was studied which could ensure seeds and water to flow into seedbed furrow together at the same level. Based on general analysis, a waterway system of the machine was designed, Take the water valve of the waterway system for example, its parameter models were set up. By applying optimum technique and major function of Matlab, its optimum design parameters were obtained, diameter of water pipe of exit was 2.5 cm, thickness of head of valve core 0.7 cm, strokes of the core I. 9 cm, diameter of big side surface of the core 6, 1 cm, and small side surface 3.0 cm. And coefficient of local loss-of-head of the water valve is 2.08. This optimum method is suitable for optimization parameter design of other parts in waterway system.