A0-总装配图
中厚煤层支撑掩护式液压支架设计
摘要
我课题的研究内容是支撑掩护式液压支架的总体设计。
现代长壁工作面采煤已经在开采区使用液压支架。液压支架不仅支撑顶板，推动刮板输送机工作面和自移式支架本身，而且还为相关的采煤设备提供一个安全的工作环境。因此正确的选择和应用液压支架是长壁工作面采煤成功的先决条件。此外，由于对液压支架需求数量很大，对液压支架的投资经常要占到长壁采煤工作面初始投资的一半以上。因此，从技术和经济两方面的观点看，液压支架是长壁采煤工作面设备中十分重要的一部分。
支撑掩护式液压支架结合了垛式液压支架和掩护式液压支架的特点。所以，支撑掩护式液压支架具有以上两者所具有的优点。
液压支架作为回采工作面的一种支护设备，液压支架在工作过程中能否取得良好的支护效果，取决于支架的架型，结构和相关参数。首先，通过进行四连杆机构优化设计来确定支架的四连杆机构各杆系的长度；然后，以力学模型为依据，分析了液压支架的顶梁、掩护梁上载荷的作用机理，得到了较为合理的支架载荷的计算公式；其次，结合设计的支架，从平面和空间两方面对支架主要结构件进行受力分析；最后对支架主要结构件、连接销轴进行强度效核,并画出所有的机械图。
关键词：支撑掩护式支架；顶梁；四连杆；双纽线；强度
Design of supportcoverhydraulicsupportfor mediumandthickcoalseamsupport
ABSTRACT
My paper mainly foused on the problemwhich is design out a type of chock-shield support.
Modern longwall mining employs hydraulic powered supports at the face area. The supports not only holds up the roof, pushes the face chain conveyor, and advances itself, but also provides a safe environment for all associated mining activities. Therefore its successful selection and application are the prerequisite for successful longwall mining. Furthermore, due to the large number of units required, the capital invested for the power support usually accounts for more than half of the initial capital for a longwall face. Therefore both from technical and economic points ofview, the powered support is avery important piece of equipment in a longwall face.
The chock shield combines the features of the chocks and the shields. As such it possesses the advantages of both.
The hydraulic support described is a part of the mining industry equipment in the mine, used for protection ofworking environment in the gallery. Itworkswell or bad atwork basing on its support mode, frame and some parameters. In the first step, the optimalvalues of some parameters of the leading four-bar mechanism are determined by using Visual Basic. Secondly, the base of mechanic model of support-surrounding, the mechanism and loads on the support is decided. The nextwork,with the condition of the design, the main mechanics of hydraulic support is analyzed and calculated by plane and spatial model. Finally, the under frame, top beam cave shield,wrists and hydraulic column are analyzed by calculation. And draw out all the process drawings.
Keywords: chock-shield hydraulic support;canopy; four-bar links; lemiscate;strengt
目录
摘要I
ABSTRACT II
1支撑掩护式液压支架概述1
1.1液压支架的用途1
1.2液压支架的工作原理1
1.2.1支架升降1
1.2.2支架移动和推移输送机3
1.3液压支架的分类4
1.4液压支架的组成4
1.4.1顶梁4
1.4.2底座5
1.4.3立柱5
1.4.4掩护梁6
1.4.5活动侧护板6
1.4.6连杆6
1.4.7操纵控制系统6
1.5液压支架的设计7
1.5.1设计目的7
1.5.2对液压支架的基本要求7
1.5.3设计液压支架必需的基本参数8
1.5.4坚硬顶板的液压支架设计8
1.6液压支架的设计动向9
2液压支架的结构设计11
2.1液压支架基本尺寸的确定11
2.1.1支架高度和伸缩比11
2.1.2支架中心距13
2.1.3支架的宽度13
2.2支架整体机构尺寸确定13
2.2.1底座长度13
2.2.2确定四连杆机构和掩护梁长度13
2.2.3确定顶梁的长度20
2.2.4液压支架的性能参数21
2.2.5立柱布置22
2.2.6支架在工作面的通风断面积验算23
2.2.7确定立柱和千斤顶24
3液压支架的受力分析及校核29
3.1液压支架的工作阻力29
3.2液压支架前连杆的受力31
3.3支架后连杆的受力32
3.4顶梁强度计算33
3.4.1顶梁受力情况33
3.4.2顶梁强度计算34
3.5掩护梁强度计算35
3.5.1掩护梁受力情况35
3.5.2掩护梁强度计算36
3.6底座强度计算37
3.6.1底座受力情况38
3.6.2强度计算40
3.6.3底座接触比压计算42
3.7立柱强度计算43
3.7.1立柱参数43
3.7.2计算重叠长度43
3.7.3各种系数的计算45
3.7.4上活柱的强度核算46
3.7.5下活柱的强度核算47
3.7.6缸体强度核算48
3.7.7立柱的稳定裕量验算48
3.8销轴的设计49
4液压支架的液压系统50
4.1立柱和千斤顶51
4.2支架液压阀53
4.2.1液控单向阀53
4.2.2安全阀53
4.2.3操纵阀54
4.3液压支架的控制方式54
4.4液压系统安装、调试55
4.4.1安装55
4.4.2调试： 59
5液压支架的操作和维护60
5.1液压支架的操作维护要求60
5.2液压支架的操作管理事项60
5.3液压支架维护和管理的具体内容61
结论63
参考文献64
致谢76
A0-顶梁
A0-掩护梁
A1-底座
A1-后连杆
A2-护帮板
A2-前连杆
A2-液压系统图
3设计所包含文件
1字数
2摘要
4目录
