.50000 (kn) Overall Automobile Frames Hydraulic Machine Hydraulic Control System Analysis And Research

The Hydraulic Press for Side Rails of Automotive Frame (HPSRAF) is one of the key equipment for automotive industries. This thesis, using one 50000KN HPSRAF as an example, researched its hydraulic damping and hydraulic parallelism systems. This paper not only introduced its theory, features, but gave several schemes. The schemes were analyzed and compared. The schemes that were adopted in the 50000KN HPSRAF were discussed deeply and experiments were made to demonstrate their lightness.In the first chapter, the theory and feature of normal hydraulic press were introduced. Then the features of HPSRAF and its current technical situation were summarized. In the end, the technical requirement of the 50000KN HPSRAF and the main contents of this paper were presented.In the chapter 2, the power mechanism and main structure of the 50000KN HPSRAF were designed first. Then the schemes of hydraulic damping and parallelism control systems were given. And their theories and characteristics were explained.The chapter 3 focused on the hydraulic damping system. First, its theory and importance were expatiated. Then the static and dynamic performance of the 50000KN HPSRAF was calculated and analyzed. Some of the relationship between the performance and some factors of the hydraulic damping system was found out according to the calculation and analysis. Then certain ways to improve the performance of the damping system were pointed out.The chapter 4 focused on multi-cylinder parallelism control system. Thetransmission of single cylinder was analyzed and some factors which affectedthe performance were pointed out at first. Then several schemes ofmulti-cylinder parallelism system were compared and analyzed. In the last thestatic and dynamic performance of the 50000KN HPSRAF was calculated andanalyzed.The chapter 5 presented the data of the experiments on the 50000KN HPSRAF.The data showed the righmess of the calculation and the analysis in the formerchapters.The chapter 6 summed up the total work of this thesis.