東方紅4lz3.5型谷物聯(lián)合收割機(jī)液壓系統(tǒng)的研發(fā)

1、河南科技大學(xué)碩士學(xué)位論文東方紅-4LZ3.5型谷物聯(lián)合收割機(jī)液壓系統(tǒng)的研發(fā)姓名：周天悅申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：動(dòng)力機(jī)械及工程指導(dǎo)教師：徐斌;賈鴻社20050101河南科技大學(xué)碩士學(xué)位論文 II Development of Hydraulic System of DongFangHong-4LZ3.5 combine ABSTRACT In the hydraulic system of traditional Dongfanghong

2、 series combine,there are more troubles ,such as high oil temperature,whistling in the valve and vibration in the oilpipe etc.Additionally,some actuator,for example,cylinder of header,reel and walking velocity adj

3、ustor is not ease to be handled through hydraulic valve due to lack of throttle valve in the hydraulic circuit when combine are working. This paper is to resolve these problems in hydraulic system of combine.Based on the

4、 theories of hydraulic transmission and control,redesignation will be done on the hydraulic system circuit and its components,corresponding parameters will be adapted to the new hydraulic system,static,dynamic analysis a

5、nd stable analysis will be proceeded to gurantee that hydraulic system and its component have a high quality of characteristics.With the theory of finite element analysis(FEA),stiffness of the relief valve body which is

6、considered to be weak comparably in the hydraulic system will be checked to promise reliability in the system. Some method will be used to do these jobs.Matlab,a software,will be used to conduct static,dynamic a

7、nalysis and stable analysis of hydraulic system with classical control theory.Checkout the stiffness on relief valve body with the theory of finite element analysis will be carried out by another software Pro/Engineer. K