棒材轧机液压系统设计说明书毕业设计.doc

毕业设计 棒材轧机液压系统设计说明书 目 录 1.前言·······································································································1 2.绪论·······································································································2 2.1液压技术概况··················································································2 2.2本课题主要研究内容·········································································2 2.3设计步骤························································································3 3.液压系统的工作要求·················································································5 3.1液压系统的组成···············································································5 3.2棒材轧机液压系统工作原理·······························································5 3.3液压系统参数计算············································································5 3.3.1确定液压缸负载·····································································5 3.3.2液压缸主要尺寸的确定····························································6 3.3.3确定液压泵的流量、压力和选择泵的规格·······························7 3.3.4与液压泵匹配的电动机的选定··············································8 4.确定液压系统方案、绘制液压系统原理图·····················································9 4.1确定液压系统方案············································································9 4.1.1液压基本回路········································································9 4.1.2选择液压回路········································································9 4.2绘制液压系统图·············································································10 4.2.1将基本回路组成系统原理图···················································10 4.2.2液压元件选择·······································································11 4.3液压系统的验算·············································································11 4.3.1系统压力损失计算································································12 4.3.2系统效率计算·······································································13 5.液压站