洁净煤技术
潔淨煤技術
길정매기술
CLEAN COAL TECHNOLOGY
2014年
6期
80-82
,共3页
翻转弧形筛%电液推杆%驱动力%理论计算%运动仿真
翻轉弧形篩%電液推桿%驅動力%理論計算%運動倣真
번전호형사%전액추간%구동력%이론계산%운동방진
flip curved screen%electro-hydraulic putter%driving force%theoretical calculations%kinematics simulation
为提高弧形筛翻转效率，采用电液推杆作为驱动装置对弧形筛进行局部改进，通过电液推杆的伸长与缩短，完成弧形筛筛箱的放平与竖起，最大限度地保留弧形筛原有结构，减少改造工作量，实现筛箱自动俯仰功能。通过理论计算和运动学仿真分别得到筛箱俯仰转动过程中所需驱动力的变化曲线。结果表明：电液推杆驱动力的理论计算曲线与仿真曲线基本吻合，筛箱俯仰翻转过程中水平姿态启动时所需驱动力最大，随着筛箱竖起角度α逐渐变大，所需电液推杆的驱动力相应减小。考虑计算误差和一定的安全系数，弧形筛选用电液推杆的额定最大推力 F max为15000 N。改造后的弧形筛在人工操作与机械驱动相互配合下实现了半自动翻转，弥补了传统弧形筛的不足，翻转过程由原来的2 h 缩短至10 min 以内，有效提高了弧形筛的翻转效率和脱水、脱介效果。
為提高弧形篩翻轉效率，採用電液推桿作為驅動裝置對弧形篩進行跼部改進，通過電液推桿的伸長與縮短，完成弧形篩篩箱的放平與豎起，最大限度地保留弧形篩原有結構，減少改造工作量，實現篩箱自動俯仰功能。通過理論計算和運動學倣真分彆得到篩箱俯仰轉動過程中所需驅動力的變化麯線。結果錶明：電液推桿驅動力的理論計算麯線與倣真麯線基本吻閤，篩箱俯仰翻轉過程中水平姿態啟動時所需驅動力最大，隨著篩箱豎起角度α逐漸變大，所需電液推桿的驅動力相應減小。攷慮計算誤差和一定的安全繫數，弧形篩選用電液推桿的額定最大推力 F max為15000 N。改造後的弧形篩在人工操作與機械驅動相互配閤下實現瞭半自動翻轉，瀰補瞭傳統弧形篩的不足，翻轉過程由原來的2 h 縮短至10 min 以內，有效提高瞭弧形篩的翻轉效率和脫水、脫介效果。
위제고호형사번전효솔，채용전액추간작위구동장치대호형사진행국부개진，통과전액추간적신장여축단，완성호형사사상적방평여수기，최대한도지보류호형사원유결구，감소개조공작량，실현사상자동부앙공능。통과이론계산화운동학방진분별득도사상부앙전동과정중소수구동력적변화곡선。결과표명：전액추간구동력적이론계산곡선여방진곡선기본문합，사상부앙번전과정중수평자태계동시소수구동력최대，수착사상수기각도α축점변대，소수전액추간적구동력상응감소。고필계산오차화일정적안전계수，호형사선용전액추간적액정최대추력 F max위15000 N。개조후적호형사재인공조작여궤계구동상호배합하실현료반자동번전，미보료전통호형사적불족，번전과정유원래적2 h 축단지10 min 이내，유효제고료호형사적번전효솔화탈수、탈개효과。
In order to improve the overturning efficiency of sieve bend,the sieve bend mas transformed by adopting the electro-hydraulic putter as driving device.The sieve bend box was ruffled and flatted by changing the length of electro-hydraulic putter.The box realized the automatic pitching function and most of the original structure of sieve bend was preserved.Variation curves of the drive force in the pitching rotation process were obtained through theoretical calculation and simulation.The results showed that,the theory curve of electro-hydraulic putt?s driving force were consistent with the simulation curve.In the overturning process,the maximum driving force was required to start at level posture,with the screen box erected angle α becomed larger,the driving force required for electro-hydraulic putter reduced according-ly.Consider the calculation error and a certain safety factor,the rated maximum thrust of the electro-hydraulic putter Fmax was 15000 N.Af-ter transformation,the curved screen achieved a semi-automatic overturning as a joint result of manual operation and mechanical drive.The overturning time was shortened from 2 h to 10 min and effectively improved the effects of dehydration,demedium and desliming.
