Yang Huayong

TL;DR: In this paper, a thrust hydraulic system of shield tunneling machine with pressure and flow compound control scheme is proposed, where the task of real-time measuring of the pressure and the displacement of hydraulic cylinder in each thrust group is accomplished by pressure sensor and displacement sensor respectively, forming the closed-loop pressure and speed control with proportional valves.

TL;DR: In this article, two kinds of kaolin filled ultra-high molecular weight polyethylene (UHMWPE) based composites were prepared by means of polymerization filling and melt mixing, respectively.

TL;DR: In this paper, the speed control of variable voltage variable frequency (VVVF) hydraulic elevator is discussed and analyzed using SIMULINK of MATLAB, and the results of both simulations and experiments show that serious flutter occurs at the start-up of the VVVMF hydraulic elevator, and there is an oscillating phenomenon in the system.

TL;DR: In this article, experiments were carried out to study the friction and wear performance for the materials of the piston and cylinder in a water hydraulic axial piston pump and the matching of a 940 stainless steel circle with a F102 engineering plastics block and an Al2O3 ceramic block were also studied.

TL;DR: In this article, a simulation of cavitating flow through water hydraulic poppet valves was performed using an advanced RNGk-epsilon turbulence model, where the working fluid was water and the structure of the valve was simplified as a two dimensional axisymmetric geometrical model.