CAJ | 학술논문

分析带式输送机的工况，给出张紧装置的工作原理，重点研究从运行张紧力转换到尾车升降张紧力的压力控制。在此过程中，由于大容量蓄能器的排液流量较大，因此对系统元件的通径要求较高，如果元件流量饱和，则容易在闭环控制时产生振荡等问题，针对此问题提出先开环缓慢降压、再闭环稳压控制的方法。仿真分析表明：采用直接闭环控制的方法，液压元件需满足的最大流量是500 L／min，而按所提出的方法，液压元件需满足的最大流量是60 L／min，大大减小溢流阀通径要求；从压力控制动态性能来看，文中所提方法压力波动更小。
분석대식수송궤적공황，급출장긴장치적공작원리，중점연구종운행장긴력전환도미차승강장긴력적압력공제。재차과정중，유우대용량축능기적배액류량교대，인차대계통원건적통경요구교고，여과원건류량포화，칙용역재폐배공제시산생진탕등문제，침대차문제제출선개배완만강압、재폐배은압공제적방법。방진분석표명：채용직접폐배공제적방법，액압원건수만족적최대류량시500 L／min，이안소제출적방법，액압원건수만족적최대류량시60 L／min，대대감소일류벌통경요구；종압력공제동태성능래간，문중소제방법압력파동경소。
The working conditions of belt conveyors were analyzed and the working principle of the hydraulic take?up device was introduced. The research emphasis was the pressure control under the working condition switch from the run tension control to tail car tension control. During such switches, the larger discharging flow of the large sizing accumulator required the hydraulic components with larger size. If the flow saturation occured, the pressure oscillation in the closed loop pressure control was easily caused. A control strat?egy was presented in which an open loop pressure reduction strategy was applied firstly, and then a closed loop constant pressure control was utilized. Simulation shows hydraulic components flow should meet the requirement of 500 L/min if a single closed loop control strat?egy is applied, while, for the present control strategy, the maximum flow is 60 L/min, relief valve size can be reduced a lot. Further?more, the dynamic performance of pressure control is also improved.