Full Hydraulic Hydraulic Drive System Dynamics Study

With the continuously extend of the national economy construction and the development of the establishment of foundational construction, the development of the engineering mechanism industry has been promoted greatly. Each domestic producing enterprises were all to expand the product category in each field, adopting the advanced technique to develop their own product or using the foreign advanced technique to raise the product quality. But because of the reason of ourselves and the existent difference with foreign advanced level, the development is subjected to the certain restrict, mainly in the product enduring, reliability, automation degree and controlling of the pollution of environment etc. Since 80's in last century, by taking in, digesting, absorbing, the engineering machine technique level and the making ability in our country had got the substantial development. With the machine-electricity-liquid technique applied continuously in recent years, the hydraulic transmission have presented a strong vitality little and little. The hydraulic technique have gradually matured abroad, its application in the engineering machine field become more frequent, and has a great trend of replacing the tradition transmission . In our country, the research is placed in the early stage in the bulldozer hydraulic drive, the theories study is basically placed in the blank appearance. The whole hydraulic bulldozer produced in our country is mostly the copy of the foreign product. Because of lacking the theories' support, the draught capability can't meet the demand of the bulldozer work condition at all, the power and economy have great difference with foreign's .The dynamics research of the hydraulic driving bulldozer have been made in this text, and the aim is to resolve the current theoretical problem in the hydraulic bulldozer, discuss the standard, method and the control methods in the match of the hydraulic bulldozer. By the analysis and research of driving form and the control mode both in home and abroad, and through experiment in door and outdoor, and calculate and compute simulation , provide the basic method of the hydraulic system designed in the whole hydraulic bulldozer , and the reasonable parameter configured of the hydraulic system, and the control form and methods of the driving system, and make up for the current shortage in the theoretical studies of whole hydraulic driving bulldozer in our country.1. By the detailed analysis and synthesize of present research condition in the whole hydraulic driving bulldozer at home and abroad , the kinetics, dynamics and the parameter of hydraulic driving system of the bulldozer have been analyzed and calculated. Some main parameters in driving and moving system, such as system pressure, speed, sliding rate , have been analyzed and confirmed, and the driving characteristic equation and the compute assistance procedure of the hydraulic driving system have been built up. The capability match of the hydraulic driving system have been analyzed, the reasonable match condition and principle and methods of the hydraulic driving system have also been studied. The match control between the engine and hydraulic driving device have been discussed and analyzed...