摘要：现代科技的飞速发展，使得所有的领域都走向机械化，无论是农业、工业还是军事等这些都离不开液压技术。没有液压系统的支持，全面的机械化就难以实现。小到医疗设备，大到航空母舰，这些都离不开液压系统。所以我们对液压元件（如：先导式减压阀）的掌握十分有必要。  34624
本次设计首先对先导式减压阀结构的探究，拟定两种方案来对先导式减压阀进行研究：一种是管接式的，另一种是板接式的。通过对比和分析，管接式的装配方便且结构简洁明了，没有复杂的结构，所以选择了现在应用最普遍的管接式减压阀进行先导式减压阀的结构设计。通过对阀内部的尺寸参数和结构来进行设计，来提高阀的密封性，并且在现有的减压阀基础上通过改变主阀芯的材料，阀芯、阀套等精密零件可选用45钢、40Cr、Cr12MoV、12CrNi3A、18CrMnTi、18CrNiWA及GCr15等高级工具钢，从而提高减压阀的灵敏度，使产品在满足设计条件要求的情况下，更加经济合理化。论文网
该设计主要参考了DR50型先导式减压阀的相关产品的结构和技术参数，并以其为基础，重新设计了先导式定值输出液压减压阀阀芯的结构参数，通过计算和不断优化使减压阀的部分或整体性能有所提高完善。
毕业论文关键词： 先导式减压阀；液压系统；密封性
The 3D modeling and design of pilot type reduction valve
Abstract：The rapid development of modern science and technology， make all fields to mechanization， agricultural， industrial or military， etc. These are inseparable from the hydraulic technology. Without the support of hydraulic system， the comprehensive mechanization is difficult to achieve. Small to medical equipment， to the carrier， these are inseparable from the hydraulic system. So we for hydraulic components (such as: pilot operated pressure reducing valve) control is very necessary.  
Abstract: This design mainly in the market today of the pressure reducing valve for the foundation， Pilot typesetting value output pressure reducing valve design. In the graduation design process adopted some of the pressure reducing valve about new technology and new ideas， And used to pilot typesetting value output pressure reducing valve design， First of all， the explore of pilot operated pressure reducing valve structure， I drew up two plans to study of pilot operated pressure reducing valve: one is the pipe joint type； the other is a plate type. Through the comparison and analysis， pipe socket type of installation is convenient and simple structure， no complex structures， so I Choose the now has more and more widely applied pipe threaded connections fixed value output pressure reducing valve， So as to improve the sensitivity of the pressure reducing valve， Make products to meet the design requirement in the case， More rationalization and In the existing based on pressure reducing valve by changing the main valve core materials， So as to improve the sensitivity of the pressure reducing valve， Make products to meet the design requirement in the case， More rationalization
In the graduation design main reference the forerunner of the pressure reducing valve DR50 type of related products structure and technical parameters， And as the foundation， To guide the design of hydraulic pressure reducing valve setting value output valve core structure parameters， Through calculation and continuous optimization of the pressure reducing valve to part or whole performance improved perfect.
目录
1.　选题的背景和意义    1
1.1　选题的背景    1
1.2　液压技术发展趋势    1
1.3　选题意义    2
2.　文献综述    2
2.1　减压阀的介绍    2
2.2　定值减压阀的介绍    2 先导式减压阀结构设计开题报告:http://www.751com.cn/kaiti/lunwen_32198.html