振动筛动力工艺参数的论文04002

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1、毕业“论文”设计题目：振动筛动力工艺参数的设计9目录0前言·································································11运动学参数·································································12动力学参数·····························································22.1参振质量·····················

2、·····················································22.2弹簧刚度····································································22.3块偏心振动器的偏心块质量和回转半径关系························22.4筛箱重心计算及振动器位置的选择····································33电动机···························

3、······················································43.1电动机类型·······························································43.2电动机功率··········································································43.3启动转矩的校核···········································

4、···················44主要零件的设计计算····························································54.1轴承············································································54.2振动轴·······································································54.3弹簧·······

5、································································74.3.1圆柱型橡胶弹簧······························································74.3.2金属螺旋弹簧······························································95结论··············································

6、·······················990前言：振动筛分为直线振动筛、圆振动筛和复合振动筛，主要用于物料的分级、脱水、脱泥、脱介。振动筛是一种高速振动的设备，其振动频率可达24Hz，因此对于振动设备的力学运动必须进行设计计算。振动筛的设计应按其用途、使用要求和物料特性等实际条件进行，其参数、结构应满足先进性、可靠性以及经济合理的要求。本文对振动筛的动力参数进行理论上的设计与探讨。1运动学参数（1）振动强度K，根据目前的机械水平，K值一般在3~8范围内。（2）抛射强度KV，根据振动筛的用途选取，直线振动筛宜取KV

7、=2.5~4.0；对圆振动筛一般取KV=3.0~5.0；难筛物料取大值，易筛物料取小值；筛孔小时取大值，筛孔大时取小值。（3）筛面倾角，对直线振动筛一般取0º，为适应不同需要可在±10º范围内选取，对圆振动筛一般取15º~25º，推荐取20º±2.5º，振幅小时取大值，振幅大时取小值。（4）推荐方向角δ，是直线振动筛的重要参数之一，一般取δ=30º~65º。难筛物料取大值，易筛物料取小值，我国目前多用40º~45º。（5）筛箱振幅A，是设计振动筛的重要参数之一，其值必须事宜，以保证物料充分分层，减少堵塞，以利透筛。通常取

8、A=3~6mm，其中筛孔大时取大值，筛孔小时取小值。（6）振动筛振动频率f，按下式计算：对直线振动筛：f=……………………………………………….（1）对圆振动筛：f=……………………………………………….（2）式中：f——振动频率，Hz；Kv——抛射强度；——筛面倾角，（°）；δ——振动方向角，（°）。（7）实际振动