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机械毕业设计全套

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XYY01-037@ZFS100002545中位放顶煤液压支架,机械毕业设计全套

内容简介：

摘 要 中位放顶煤液压支架的放煤口 位于支架高度的中部，即掩护梁上。工作面为双输送机， 一 前一后分别运输采煤机的落煤和放落的顶煤。由于工作面有两套独立的出煤系统，采煤和放煤间干扰较少，可以实现采、放平行作业，提高工作面生产率。 中位放顶煤液压支架是当前我国应用数量较多，分布面较广的综放支护设备。它已不仅是一种单纯维护工作面空间的支护设备，还是一种依靠矿山压力破碎煤体，具有放煤功能的综采设备。 本次设计的四连杆中位放顶煤液压支架 ZFS10000/25/45， 有顶梁、底座、掩护梁、立柱、前后连杆等几部分组成。 放煤 口设在掩护梁上，采用 两 部输送机， 架型为支撑掩护式，适用于厚煤层的开采。 由于 该支架 采用了四连杆机构，因而 受力状态好，抗扭能力强 。因此，该 四连杆型式的放顶煤支架适合于倾角较大煤层的放顶煤开采。 此支架具有受力状态好，抗扭能力强，不易倒架，不易损坏且煤尘较小等优点，其不足之处为：（一）后输送机置于底座上，挡煤板与架间浮煤易损坏中部槽，人工清理浮煤劳动强度大，效率低；（二）由于掩护梁不能摆动，仅靠放煤机构对跨落下来的大块煤进行二次破煤的能力欠佳。 关键词 ：四连杆； 中位放顶煤； 液压支架 ntsABSTRACT The position puts against the coal powered supports to put the coal mouth to be located in the middle of supports, on the caving shield.The working surface has two conveyors, tandem separately transport the loader to fall the coal and to put against the coal.Because the working surface has two set of independent coal systems, mining coal and puts the coal room disturbance to be few, may realize pick and put on parallel operations, enhances the working surface productivity.The position puts against the coal powered supports are now adopt most in our country, the distribution are abroad synthesis of support and protect equipments. Not only it was already one kind of pure maintenance work space of support and protection equipments, one kind of dependence underground pressure broken pulverized coal body, had puts the coal function the synthesis to pick the equipment. In this design four-bar the position puts against coal powered support ZFS10000/25/45. It consists of canopy, base plate, caving shield, hydraulic legs, front and rear lemniscate bars and so on. The coal mouth is located in the caving shield, uses two conveyors, the support type is chock shield, is suitable in thick seam mining.Because the support has used four-bar mechanism, the stressful condition is good, has stable torsional ability. Therefore, the four-bar type puts against the coal support to suit in the big inclination angle coal puts against coal mining. This support has the good stressful condition , has stable torsional ability, not easy to lose face, not easy to damage also the coal dust is small and so on,.Its deficiency is: (1) Back conveyor puts base plate, keeps off the coal board and the bay floats the coal easily to damage the trough, the hand cleaning floats the coal labor intensity to be big, the efficiency is low; (2) Because caving shields are not able to swing, only depends on put the coal organization to the big lump coal which cross falls down to carry