4LZ-2.1Z型双速双动水稻联合收割机设计与试验

为适应南方丘陵山区作业环境,解决全喂入联合收割机收获超级杂交稻时,易发生脱粒滚筒堵塞,脱不净、夹带损失与籽粒破碎损失之间矛盾,提高水稻机械化收获水平,研制4LZ-2.1Z型双速双动水稻联合收割机。对机具整体设计方案进行描述,并对可调节伸缩式割台、双速双动脱分装置和清选总成等进行设计,确定其关键结构参数。该装备采用高/低速脱粒滚筒、回转式凹板筛构成的双速双动脱分装置和全喂入收获方式,能够一次实现水稻扶禾、切割、喂入、脱粒、清选等功能,满足丘陵山区水稻收获要求。田间试验表明,该样机作业性能稳定,损失率、含杂率和破碎率分别为1.34%、0.40%和0.20%,各项性能指标均优于检测标准。

Development and experiment on 4LZ-2.1Z type double speed and double action rice combine harvester

In order to adapt to the working environment in the hilly and mountainous areas of South China and solve the problems when the full feeding combine harvesters harvest super hybrid rice,such as the problems of threshing drum block,impurity removal,entrainment loss and grain breakage loss,a 4LZ-2.1Z-type double speed&double action rice combine was developed to improve the mechanization of rice harvesting.In this paper,the overall design scheme of the machine is described and then the adjustable retractable harvester header,double speed&double action threshing-separating device and cleaning assembly are designed,and finally the key structural parameters are determined.The equipment adopts high/low speed threshing drum,rotary concave plate screen which is composed of double speed and double action threshing-separating device and full feeding way of harvesting.It is able to achieve the functions of holding,cutting,feeding,threshing and cleaning at the same time and meets the requirement of rice harvest in hilly area.Field tests show that the prototype has stable performance,with the loss rate,impurity rate and breakage rate of 1.34%,0.40%and 0.20%respectively.Each performance index is better than the test standard.