中文摘要：

为使4ZTL-2000型摘穗收获机收获超级稻时具有最佳清选性能,以谷物清洁率和沉降箱能耗为指标,沉降箱入口气流速度、谷物喂入量及其初速度为影响因素,采用二次正交旋转组合设计试验,利用Design-Expert 6.0.10进行数据处理,得出回归数学模型,通过响应曲面方法分析指标与因素间的相互作用,并对回归数学模型进行多目标优化。结果表明：沉降箱入口气流速度对沉降箱指标影响最大,谷物初速度相对小,谷物喂入量的影响最小。为使沉降箱处理超级稻（目前谷物喂入量最大为3.78 kg/s）时具有最佳性能,通过优化获得运行参数的最佳组合为：沉降箱入口气流速度为13.93 m/s,谷物初速度为18.84 m/s。通过试验验证谷物清洁率达到了90.1%,沉降箱能耗为348.3 Pa,籽粒沉降效率为100%。

英文摘要：

4ZTL- 2000 rice stripper combine harvester with air suction is a feasible machine for the harvesting of super rice. Deposition chamber is a key part of combine harvester. In order to obtain the outstanding performance and optimal parameters of the deposition chamber to clean super rice, quadratic orthogonal rotational combinational design was conducted. The factors were selected as inlet airflow velocity of the deposition chamber, mass and velocity of grain fed. Cleaning rate of grain and airflow pressure drop in the deposition chamber were objective indexes. The regression models between indexes and factors were developed by using Design-Expert software. The interactions of factors on the indexes were analyzed by the response surface method. The results show that inlet airflow velocity of the deposition chamber has the most significant effect on the indexes of the chamber, followed by velocity of grain fed, then mass of grain fed. In order to make the deposition chamber reach optimum performance to clean super rice under the mass of grain fed of 3.78 kg/s in combine harvester, factors in the regression mathematical models were optimized to obtain the optimal parameters as inlet airflow velocity of deposition chamber of 13.93 m/s, velocity of grain fed of 18.84 m/s with cleaning rate of grain out of the deposition chamber of 90.26% and airflow pressure drop in the deposition chamber of 350.36 Pa. The verified experimental results were that cleaning rate of grain out of the deposition chamber of 90.1% and airflow pressure drop in the deposition chamber of 348.3 Pa, which were consistent with the optimized results. The results offer the information to improve the performance of the deposition chamber to clean super rice in stripper combine harvester.