"工程机械用三级液压缸设计与仿真：降低成本、缩短开发周期"

The topic of this thesis is the design and simulation of three-stage hydraulic cylinders for construction machinery. The design of hydraulic cylinders includes the selection of system working pressure, determination of cylinder diameter and outer diameter, determination of piston rod diameter and piston diameter, calculation of cylinder wall thickness, determination of cylinder head thickness, determination of cylinder length, calculation of buffer device, and verification of piston rod stability. This design is completed using empirical design methods and computer-aided engineering technology. Firstly, the installation scheme of the hydraulic cylinder is determined based on empirical formulas, and the size parameters of the piston and piston rod of the hydraulic cylinder are designed, and the matching connecting bolts, pins, etc. are checked. Finally, the hydraulic cylinder assembly drawing is completed using CAD software, and motion simulation and analysis are carried out using Solidworks. Through the simulation and analysis of the three-stage hydraulic cylinder, the rationality and feasibility of this design are proven. It reduces design costs, reduces product development time, and further familiarizes graduates with the product design and development process, proficiently operating design software, laying a solid foundation for their future work. Keywords: Construction machinery, three-stage hydraulic cylinder, design, simulation.