拖拉機液壓系統(tǒng)多路閥結構設計及優(yōu)化
[Abstract]:Tractor is one of the most important agricultural machinery in our country. As a transmission technology, hydraulic system becomes an important part of tractor, and multi-way reversing valve is the core control element in tractor hydraulic system. Its main function is to control the action of multiple actuators, which determines the working performance of the tractor. However, there are many problems in the hydraulic system of domestic tractor, such as excessive leakage, serious pressure loss and excessive reversing force, which seriously restrict the development of multi-way reversing valve and agricultural machinery equipment. In view of the above problems, this subject takes 1002 / 1202 series crawler tractor hydraulic system multi-way reversing valve as the research object, summarizes the domestic and international development situation of the multi-way reversing valve, and puts forward a special design scheme of a new type of four-position slide valve with throttle slot. Theoretical analysis, numerical simulation and experimental verification are used to study deeply. The mathematical model of new throttle is constructed, and the structure of throttle is optimized by particle swarm optimization algorithm, and the optimal design parameters of throttle are obtained. Based on the principle of computational fluid dynamics and fluent fluid simulation software, the geometry model of multi-channel reversing valve is established by Solidworks software. The results show that compared with the original valve, the local maximum velocity of the new valve decreases and the pressure loss decreases. The leakage rate is also reduced, which can reduce the steady state hydraulic power of the multi-way reversing valve in the course of operation, so that the maximum steady state hydraulic power of the valve core is less than that of the reversing operation force, so as to enhance the working stability of the multi-way valve; according to the industry standard, The test scheme was made and the schematic diagram of the test system was designed. By using the comprehensive hydraulic test bench, the related performance tests of the multi-way directional valve were carried out. The test results showed that the test data were basically consistent with the simulation data. The accuracy of flow field simulation and the rationality of the structure design of four-position slide valve throttle are verified. In this paper, by optimizing the structure of four position slide valve throttle slot in the hydraulic system of tractor, the flow characteristics of the valve orifice can be improved, and the working performance of the whole machine can be improved. At the same time, the flow field simulation and test method used can guide the design of multi-way reversing valve and other hydraulic components, and provide some data support and theoretical guidance for the development of related products.
【學位授予單位】:河南科技大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:S219.032.1
【參考文獻】
相關期刊論文 前10條
1 徐莉萍;崔彥斌;蔡留金;;拖拉機液壓系統(tǒng)多路閥結構改進及流場仿真[J];液壓與氣動;2016年12期
2 武文斌;李廣東;趙梅香;楊志懷;;負載敏感抗流量飽和技術分析及仿真研究[J];液壓氣動與密封;2016年10期
3 姜濤;黃偉;王安麟;;多路換向閥換向耦合閥口節(jié)流結構拓撲設計[J];西安交通大學學報;2016年08期
4 姜濤;黃偉;王安麟;;多路閥閥芯節(jié)流槽拓撲結構組合的神經網絡模型[J];西安交通大學學報;2016年06期
5 李雙雙;王志平;白建波;;基于CFD的高壓多路閥微溝槽與均壓槽閥芯摩擦性能比較[J];機床與液壓;2016年01期
6 吳健興;路芳;曾超;;基于CFD的液壓挖掘機負載敏感多路閥流道流場仿真分析[J];液壓氣動與密封;2015年09期
7 魯力群;王秀景;范鈺涓;王翰濤;;M4系列電液比例多路閥特性研究[J];機床與液壓;2015年11期
8 李維嘉;蘭秋華;彭勇;易迪升;;基于粒子群算法的滑閥節(jié)流槽優(yōu)化設計[J];中國機械工程;2015年08期
9 張君;;負載敏感比例多路閥常見故障分析[J];液壓與氣動;2015年04期
10 路芳;吳健興;;基于CFD的液壓挖掘機負載敏感多路閥流道改進優(yōu)化分析[J];液壓氣動與密封;2015年03期
相關博士學位論文 前1條
1 劉英杰;負載口獨立電液比例方向閥控制系統(tǒng)關鍵技術研究[D];浙江大學;2011年
相關碩士學位論文 前10條
1 黃敏;雙線圈磁流變閥結構設計及壓降特性研究[D];華東交通大學;2014年
2 朱海濤;基于FLUENT高響應大流量節(jié)流閥流動分析和結構改進[D];安徽理工大學;2014年
3 王歡;雙三角形節(jié)流槽滑閥閥口特性及液動力分析[D];武漢科技大學;2014年
4 房小立;基于CFD有限元法的滑閥穩(wěn)態(tài)液動力研究[D];武漢科技大學;2012年
5 李冰;5噸裝載機用多路閥的優(yōu)化設計與開發(fā)[D];山東大學;2012年
6 孫燦亮;一回路止回閥強度分析及優(yōu)化設計[D];哈爾濱工程大學;2011年
7 要繼業(yè);基于Fluent的節(jié)流槽滑閥仿真[D];燕山大學;2010年
8 王兆強;挖掘機多路閥的閥口結構改進及性能分析[D];蘭州理工大學;2010年
9 曾定榮;多路閥綜合試驗系統(tǒng)設計及試驗研究[D];浙江大學;2010年
10 曹保忠;負載敏感液壓系統(tǒng)抗流量飽和控制技術研究[D];大連理工大學;2009年
,本文編號:2137370
本文鏈接:http://www.sikaile.net/shoufeilunwen/zaizhiyanjiusheng/2137370.html