毕业设计 煤矿综合机械化采煤成套设备的液压支架研究设计.doc

山东科技大学学士学位论文 PAGE  PAGE IV 摘要 本论文题目来源于煤矿综合机械化采煤成套设备的液压支架研究设计，主要任务是论述液压支架的主要设计过程。本文在详述液压支架发展历史及国内发展现状的基础上，分析了液压支架的组成和工作原理，并对一下内容做了设计计算：液压支架的选型设计、主要参数的确定、主要零部件的设计及强度校核。 根据所要求的支撑条件，采用掩护式液压支架形式。本支架针对较薄煤层赋存特点，结构紧凑，支撑效率高。支架采用四连杆机构，改善支架的受力状况，缩小支架升降过程中的顶梁前端前后移动的距离。立柱采用双伸缩液压缸，以满足支架最低及最高位置时的高度要求。平衡千斤顶采用2个Φ125mm缸径千斤顶，增加了平衡千斤顶作用可靠性以及连接装置的可靠性。底座采用中封式整体刚性底座，既可保证推移机构能顺利排出浮煤，又可提高支架整体刚度。 关键词：液压支架；四连杆；立柱；顶梁；底座 Abstract The task of the graduation design comes from coal mechanized coal mining equipment research and design of hydraulic support, the main task is to discuss the main hydraulic design process.?This paper details the history and development of hydraulic support domestic development status, based on analysis of the composition and hydraulic works, and what content to do the design calculations: selection of hydraulic design to determine the main parameters of the main components?The design and strength check. According to the support required by the conditions, using the cover of hydraulic support form.The support for the thin coal seam characteristics, compact structure, support and high efficiency.?Support a four-link mechanism, to improve the support of the loading force, the process of narrowing down the top support beam before and after the move away from the front.Column by double telescopic hydraulic cylinder, to meet the minimum and maximum position bracket height requirements.?Balanced by two Φ125mm bore jack jack, jack the role of increased reliability and balance the connecting device reliability.?Base used in sealing the overall rigid base, organizations can ensure a smooth discharge floating over coal, but also improve the overall stiffness of scaffold. Keywords: hydraulic pressure support ; upright four-link mechanism ; prop; Top-beam ; foundation 目 录  TOC \o 1-3 \h \z  HYPERLINK \l _Toc263778659 摘要  PAGEREF _Toc263778659 \h I  HYPERLINK \l _Toc263778660 Abstract  PAGEREF _Toc263778660 \h II  HYPERLINK \l _Toc263778661 1绪论  PAGEREF