Jian Yi Kong

Study on EHL Film Thickness of Non-Rectangular Section Vane Seal

The sealing contact pressure is critical in determining the film thickness of elastohydrodynamic lubrication (EHL) on the seal. Contact pressure in sealing surface of non-rectangular section vane seal was obtained via FEA, and the polynomial equation of the contact pressure distribution was fitted with regression analysis. Therefore, the numerical model for the EHL film thickness can be developed and solved. Typical results of film thickness distribution and frictional force for the vane seal at room temperature were obtained. The EHL film thickness distributions follow the variation of the related contact pressure, and the sliding speed is also significant on the average film thickness and the hydrodynamic friction.

Fuzzy Control-Based Air-Compressor Constant Pressure Gas Intelligent Control

The air compressor system is a time-varying, delay and nonlinear complex system, it has a very important sense to ensure that the supply pressure is stable in the compressor control system. According to the working characteristic of air compressor system, the fuzzy control theory, as one of the modern control theories, was applied into the constant pressure control system to design a fuzzy pressure controller. The simulation results show that the controller was more convenient and effective; it has certain directive significance and reference for the other parameter’s control of air compressor system.

Study on the Method for CFX Numerical Simulation of Flow Field in Screw Conveyer of Sand Fracturing Blender

Screw conveyer is an important component of sand fracturing blender.seamless Link of Pro/e and CFX through ANSYS Workbench. Numerical simulation of water flow over the screw conveyer using Realizable k-ε turbulence model. From the stress nephogram, velocity nephogram, Velocity vector pofile and micro swirl field pattern, it is seems that the test results can work well under the actual operation condition of field application. This paper also focuses on exploring the method of CFX software simulation when it is used to calculate the internal flow field of the screw type sand transporter. Hence, it is an important guiding significance to the structural optimization design of screw conveyer.

Influence of Working Lining Parameters on Stress Field of Ladle Composite Construction Body

The ladle is an important equipment of the metallurgical industry. Distribution of thermomechanical stress in linings has an essential influence on its life, and the size of its life-span influences the economic benefits of the iron and steel enterprise directly. Two-dimensional model of ladle based on law of finite element method is built, and the influence of thermal conductivity, thermal expansion coefficient, elasticity coefficient and thickness of work lining on ladle stress field are discussed. The calculation results indicate that stress increases with the increase of thermal conductivity, thermal expansion coefficient and elasticity coefficient and decrease of thickness.

Research on the Air-Fuel Ratio Intelligent Control Method for Coke Oven Combustion Energy Saving

Coke combustion process, the constant proportion of the combustion air-fuel ratio control results in low combustion efficiency and fault-prone, difficult to adapt to changes in complex working conditions. Application of intelligent technology of case-based reasoning, fuzzy control, proposed for intelligent energy saving air-fuel ratio control method. Based on current trends in working conditions and combustion process in case of failure, predict the typical faults with case-based reasoning technology to the combustion process. On this basis, through case-based reasoning algorithm realize the real-time air-fuel ratio correction. Based on fuzzy-PID temperature cascade control we can obtain the appropriate flue gas flow and flue suction and realize the stability of the combustion process to achieve optimal control.

Kinematic Analysis of a Spatial 6-Bar Linkage Mechanism

The door operator in metallurgical equipment is a spatial 6-bar linkage mechanism. The numerical model of motion and force of the mechanism was developed and the numerical solution was applied. A computer simulation was implemented. There is a high level of consistency between the solution and simulation. The torques required on driving crank have been studied. The influences of the self-lock conditions on the crank length and con-rod length have been explored. The effects of the length of crank and con-rode on the needed maximal torques of the crank have been studied, too. And the kinematics analysis attributes the lightening design of the slider structure on the basis of considering the sliders rigidness and intensity.

Numerical Simulation for Solid-Liquid Two-Phase Flow in Stirred Vanadium Leaching Tank

The flow field in the leaching tank for the vanadium extraction in the stone coal was simulated by the Computational Fluid Dynamics (CFD) software. The flow field physical model was established by GAMBIT and the agitating area was processed by k-ε turbulence model and multiple reference frame method. The mixing effect was discussed under the two conditions: (1) Double impellers rotate in the same direction. (2) Double impellers rotate in different directions. The result shows that the mixing effect of the double impellers which rotate in different directions is better under the same condition. Its distribution of the turbulent kinetic energy is more reasonable, and it can ease the sediment at the bottom. The simulation results have certain reference value for the research of the law of the inner flow field so as to optimize its structure in the stirred reaction vessel.

A Kind of Improved Pass Structure of Double Regenerative Burner with the Numerical Simulation of Thermal Stress Field

In order to solve the problem of cracks of the double regenerative burner, a kind of new low stress pass structures was developed, and the corresponding 3D CAE model was set up. The results of numerical simulation of thermal stress field of the new pass structure showed that the thermal stress and stress amplitude of the new pass structure is relatively lower and thus can improve the service life of burner.

The Optimization of the Pass Structure of Double Regenerative Burner with the Numerical Simulation of Thermal Stress Field

In order to solve the problem of cracks of the double regenerative burner, six kinds of low stress pass structures were newly developed and corresponding 3D CAE models were set up. With the FEM numerical simulations of thermal stress field of various combinations of different pass structures and the comparative study, the optimized pass structure that the thermal stress is relatively lower and thus can improve the service life of burner was determined.

Finite Element Analysis for Hydraulic Support

The paper was mainly research on hydraulic support by finite elements method. It took a certainly type of hydraulic powered support as an example. All parts of hydraulic support were analyzed in finite element analysis software Ansys Workbench12.1. The simulation data was compared with test data and the relative error factor was discussed, it indicated that three-way pasting the strain foil could generate much more low relative error than other ways or pasting foils in pressure frame test.