Design and calculation of semi-automatic overturning sieve bend
Han Chun-shen · Clean Coal Technology · 2014
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 putts 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 accordingly.Consider the calculation error and a certain safety factor,the rated maximum thrust of the electro-hydraulic putter Fmax was 15000 N.After 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.