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本文是阐明跳汰水流运动特性对分选过程作用的研究.在实验研究的基础上,提出了当分选50～0和50～3毫米级煤时,应采用不同的跳汰水流运动特性——似正弦跳汰周期和似贝尔德跳汰周期.通过对床层松散度的试验,作者归纳出四种床层松散状态,并提出当床层的上下层先开始松散,然后中层松散的松散状态最为理想.经实验和分析研究后得出,当跳汰过程床层具有中等相对松散度时,涡流撞击压力是水流作用在群粒上的水动力学的基本形式.根据对床层厚度和筛下补给水实验资料的分析,提出了适当的床层厚度和降低筛下补给水的途径——改变风阀周期.为了精确地测定跳汰脉冲水流运动特性和评价跳汰产品质量,作者根据所发现的特殊磁场,制出了浮标式电磁感应变换器和提出对跳汰分层产物分选精确度的计算方法.
Based on the experimental study, it is proposed that different jigging kinetic characteristics should be adopted when classifying 50 ~ 0 and 50 ~ 3 mm grade coals, Similar to the cycle of quasi-Jigging and Bell-like jigging cycle.Through the test of bed bulkiness, the authors conclude four kinds of bed loose state, and proposed that when the upper and lower bed began to loose, then the middle loose loose The most ideal.According to the experiment and analysis, it is concluded that the eddy current impact pressure is the basic form of hydrodynamics when the jig is moderate relative looseness.According to the analysis of the bed thickness and the sieve Under the analysis of the experimental data of the make-up water, the appropriate bed thickness and ways to reduce the supply of water under the sieve are proposed - changing the cycle of the damper.In order to accurately determine the jogging pulse flow characteristics and evaluate the quality of jig products, Found a special magnetic field, made a float-type electromagnetic induction converter and put forward jig layered product sorting accuracy calculation method.