液压支架_支撑式液压支架_掩护式液压支架

液压支架概况

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液压支架的组成

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液压支架的用途

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液压支架工作环境

液压支架的工作原理

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液压支架的分类

支撑式液压支架：支撑是液压支架的架型有垛式支架和节式支架两种形式

支撑式液压支架前梁较长，支柱较多并呈垂直分布，支架的稳定性由支柱的复位装置来保证。因此底座较坚固，它靠支柱和顶梁的支撑作用控制工作面顶板，维护工作空间。顶板岩石则在顶梁后部切断垮落。这类支架具有较大的支撑能力和良好的稳定性能，适用于顶板坚硬完整，周期压力明显或强烈，地板较硬的煤层。

支撑式液压支架类型

a.DUOSHIYEYAZHIJIA b.JIESHIYEYAZHIJIA

掩护式液压支架：掩护式液压支架有插腿式和非插腿式两种

掩护式液压支架顶梁较短，对顶班的作用力均匀；结构稳定，抵抗直接顶水平运动能力强；防护性能好，调高范围大，对煤层厚度变化适应性强；但整架工作阻力小，通风阻力小，工作空间小。这类支架适用于直接顶不稳定或中等稳定的煤层。

掩护式液压支架类型

a.插腿式液压支架
b.立柱在掩护梁上非插腿式液压支架
c.立柱在顶梁上非插腿式液压支架

支撑掩护式液压支架：是在支撑式液压支架和掩护式液压支架的基础上发展起来的一种架型。

支撑掩护式液压支架保留了支撑式支架支撑力大、切顶性能好、工作空间宽敞等优点，采用双排立柱支撑；同时又吸取掩护式支架挡矸掩护性能好，抗水平力腔结构稳定等长处。而且，采用坚实的掩护梁以及侧护板，将工作空间与采空区完全隔开；并采用前后连杆连接掩护梁和底座，组成四连杆机构，使梁端距几乎不变，防止了架前漏矸。

支撑掩护式液压支架类型