掩护式液压支架设计1

机械论文编号:JX316 所有图纸,外文翻译。论文字数:24722.页数:93  PROE图

目  录
1液压支架概述 ................................................................1
1.1液压支架的发展及其趋势 ....................................................1
1.1.1液压支架的发展 ..........................................................1
1.1.2液压支架的发展趋势...................................................... 1
1.2液压支架的分类及命名规则 ..................................................2
1.2.1液压支架的分类.......................................................... 2
1.2.2 液压支架的产品型号命名 .................................................4
1.3液压支架的组成及工作原理.................................................. 5
1.3.1液压支架的组成.......................................................... 5
1.3.2 液压支架的工作原理..................................................... 7
2液压支架结构和性能参数设计 ..................................................11
2.1液压支架的结构设计........................................................ 11
2.1.1主要尺寸的确定 ..........................................................11
2.1.2四连杆机构的确定 ........................................................15
2.2液压支架性能参数的确定 ....................................................26
2.2.1 支护面积 ...............................................................26
2.2.2．确定立柱规格 .........................................................27
2.2.3 泵站压力确定 ...........................................................28
2.2.4 底板接触比压 ...........................................................29
2.2.5 推移千斤顶 .............................................................30
2.2.6 平衡千斤顶 .............................................................32
3液压支架的强度设计.......................................................... 37
3.1支架的受力分析和强度校核.................................................. 37
3.1.1受力分析 ................................................................37
3.1.2强度校核 ................................................................44
3.2支架受力的影响因素 ........................................................54
3.2.1 支架高度实际工作阻力的影响 .............................................54
3.1.2 摩擦系数时支架实际工作阻力的影响 .......................................55
3.1.3 平衡千斤顶的拉、推力对支架的受力影响................................... 55
3.1.4立柱倾角对实际工作阻力的影响 ............................................55
4 液压支架液压系统 ...........................................................56
4.1液压系统的特点............................................................ 56
4.2 支架的各个动作及其液路 ...................................................57
5液压支架的三维会图及其动画 ..................................................58
5.1建立三维实体模型 ..........................................................59
5.2支架三维实体模型的装配 ....................................................59
附  录................................................................ .......63
1．确定最合适的四连杆程序 ....................................................63
2．程序运行数据 ..............................................................67
3．双纽线图编写程序：........................................................ 70
参考文献： ...................................................................75
翻  译................................................................ .......77
英语原文： ...................................................................77
汉语译文..................................................................... 83
致谢........................................................................ 88

摘    要

      液压支架的出现，把回采工作面的支护技术从手工支护发展到机械化支护,它作为回采工作面的一种支护设备，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。本课题主要讲述的是：首先，通过计算机软件Visual Basic来进行四连杆机构优化设计编程来确定支架的四连杆机构各杆系的长度及其相对空间位置；然后，确定液压支架的性能参数；其次，通过二维软件AuotoCAD、三维软件Pro/ENGINEER来进行结构设计以达到优化；接着，以力学模型为依据，分析了液压支架的顶梁、掩护梁、底座上载荷的作用机理，得到了较为合理的支架载荷的计算公式；再次，结合本次设计的支架，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强进行度效核。
在完成本设计的过程中，利用理论分析的同时，也采用了许多实际经验，做到理论与实践相结合。

关键词：掩护式支架  四连杆优化设计  受力分析  强度校核

ABSTRACT
Since hydraulic support appeared,the technology of support has been developed form manual support to mechanical support on the working face.The hydraulic support described is a part of the mining industry equipment in the mine, used for protection of working environment in the gallery. It works well or bad at work basing on its support mode, frame and some parameters. In the task,firstly, the optimal values of some parameters of the leading four-bar mechanism are determined by using Visual Basic. Secondly, ascertain the capability of hydraulic support. Nextly, the model is founded with the two-dimensional software, autoCAD， the three-dimensional software, Pro/ENGINEE, and also do the Simulink, SimMechanics and simple analysis. Then on the base of mechanic model of support-surrounding, the mechanism and loads on the support is decided. The next work, 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.
During the course of doing the paper, author not only analyses something theoretical, but also adopted a lot of actual experiences. Combining theory and practice. Therefore, the paper possesses theory and practical value, so it measures up the requiring of the nation to the undergraduate.

Key words: shield hydraulic support  four-bar links  optimal design  mechanics characteristics   strength checking