Research on Velocity Influence on Thermal Deformation Field of Heavy Hydrostatic Thrust Bearing

2010 ◽  
Vol 129-131 ◽  
pp. 968-972
Author(s):  
Xiao Dong Yang ◽  
Jun Peng Shao ◽  
Xiao Qiu Xu ◽  
Yun Fei Wang ◽  
Chao Yin ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Theoretical Basis ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Structure Design ◽  
Shape Deformation ◽  
Hydrostatic Bearing ◽  
Deformation Problem ◽  
Heavy Equipment ◽  
Wedge Shape

According to the structure of workbench and base of heavy hydrostatic bearing which is applied in heavy equipment, thermal deformation equations of the structure are deduced and boundary conditions for numerical simulation are established based on thermal elasticity theory. Then thermal deformation of hydrostatic bearing without load is calculated at different velocity. The results indicate that: temperature and velocity impacts a significant influence on thermal deformation of hydrostatic bearing. Thermal deformation increases as the velocity increases; workbench up-warps severely, oil-pad inclines towards outside to a certain extent, which results in the lubrication clearance emerges as wedge-shape deformation. The conclusions from thermal deformation calculation could provide theoretical basis for structure design of hydrostatic bearing and ravel out the thermal deformation problem.

FEM Analysis of Contact for Converter Spherical Hinge

2013 ◽  
Vol 365-366 ◽  
pp. 331-334
Author(s):  
Xue Ping Ren ◽  
Jian Da Gao
Keyword(s):  
Numerical Simulation ◽  
Thermal Stress ◽  
Optimum Design ◽  
Theoretical Basis ◽  
Fem Analysis ◽  
Structure Design ◽  
Coupling Field ◽  
Main Components ◽  
Spherical Hinge

The role of converter spherical hinge is one of the main components, combined with practical work and With help of FEM, Thermal Stress coupling field of spherical washer can been obtained through numerical simulation. The result supplies substantial theoretical basis for further structure design and optimum design of mechanism.

Contrastive Analysis on Thermal Deformation of Thrust Bearing Pad with Two Kind of Supporting

2014 ◽  
Vol 494-495 ◽  
pp. 554-557
Author(s):  
Yong Hai Li ◽  
Shi Bo Liu ◽  
Rong Kui Yao ◽  
Jian Wang ◽  
Ning Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Temperature Field ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Deformation Field ◽  
Contrastive Analysis ◽  
Tilting Pad ◽  
Finite Element Numerical Simulation ◽  
Point Line

In order to solve thermal deformation, the finite element numerical simulation of two kind of tilting pad thrust bearing is made for the same pad surface, and thermal deformation is made to analyze comparatively. The results show that the temperature field, the deformation field and the values of pad are similar for two different supported thrust bearing (point, line support) under the same operating condition. The pad temperature and deformation will increase with the increasing of pv values. According to the calculation conditions, the temperature field rose about 1°C, and the thermal deflection increased 0.002mm with pv value increased by 10%.

Simulation on Multi-Oil-Cavity and Multi-Oil-Pad Hydrostatic Bearings

2013 ◽  
Vol 274 ◽  
pp. 274-277 ◽  
Author(s):  
Xiao Qiu Xu ◽  
Jun Peng Shao ◽  
Xiao Dong Yang ◽  
Yan Qin Zhang ◽  
Xiao Dong Yu ◽  
...  
Keyword(s):  
Hydraulic System ◽  
Thrust Bearing ◽  
Three Dimensional ◽  
Structure Design ◽  
Analysis Software ◽  
Hydrostatic Bearing ◽  
Hydrostatic Bearings ◽  
Simulation Results ◽  
Three Dimensional Models ◽  
Volume Method

Taking multi-oil-cavity and multi-oil-pad hydrostatic bearings as studied projects, firstly make brief instructions for structure characteristics and working principal of hydraulic system; Then, build three-dimensional models of multi-oil-cavity and multi-oil-pad hydrostatic bearings respectively. Adopting finite volume method, oil film mesh is generated by universal finite analysis software CFD; then, carry on numerical simulations for pressure distribution and temperature distribution of the two studied hydrostatic thrust bearing under various viscosity, and make comparative analysis for difference between the two studied hydrostatic thrust bearing. Based on the analysis of numerical simulation results, the conclusions whether oil-return groove is set for hydrostatic bearing could be received. Simulation results reveal truly the influence of setting oil-return groove or not on hydrostatic thrust bearing, and improve structure design for hydrostatic thrust bearing.

Deformation Analysis of Hydrostatic Thrust Bearing under Different Load

2014 ◽  
Vol 494-495 ◽  
pp. 583-586
Author(s):  
Yan Qin Zhang ◽  
Li Guo Fan ◽  
Yao Chen ◽  
Rui Li ◽  
Tian Zheng Wu ◽  
...  
Keyword(s):  
Thrust Bearing ◽  
Three Dimensional ◽  
Deformation Analysis ◽  
Hydrostatic Bearing ◽  
Deformation Problem ◽  
Large Size ◽  
Set Up ◽  
Load Simulation ◽  
Bearing Structure ◽  
Ansys Workbench

In order to solve deformation problem of large size hydrostatic thrust bearing under different load. Simulation model of fan cavity hydrostatic thrust bearing, three-dimensional mathematical model in guide rail is set up. Using CFD principle, FIUENT and ANSYS Workbench software, temperature field, pressure field and deformation field of hydrostatic bearing is simulated. Hydrostatic bearing deformation under different load conditions can be simulated and the lubrication characteristic is forecast in advance through this method. It provides valuable theoretical basis for hydrostatic bearing structure parameter optimization of oil cavity and worktable.

Simulation Research on Temperature Field of Circular Cavity Hydrostatic Thrust Bearing

2009 ◽  
Vol 419-420 ◽  
pp. 141-144 ◽  
Author(s):  
Xiao Dong Yu ◽  
Xiu Li Meng ◽  
Bo Wu ◽  
Jun Peng Shao ◽  
Yan Qin Zhang ◽  
...  
Keyword(s):  
Temperature Field ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Three Dimensional ◽  
Circular Cavity ◽  
Cavity Radius ◽  
Distribution Law ◽  
Cavity Depth ◽  
Simulation Research ◽  
Heavy Equipment

In order to solve the thermal deformation of the hydrostatic thrust bearing in the heavy equipment, a simulation research concerning temperature field of multi-pad hydrostatic thrust bearing having circular cavities was described. The Finite Volume Method of Fluent has been used to compute three-dimensional temperature field of gap fluid between the rotation worktable and base. This study theoretically analyzes the influence of cavity radius and cavity depth on the bearing temperature performance according to computational fluid dynamics and lubricating theory. It has revealed its temperature distribution law. The simulation results indicate that an improved characteristic can be gotten from a circular cavity hydrostatic thrust bearing, oil cavity temperature decreases by gradually with cavity radius enhancing, oil cavity temperature decreases by gradually with cavity depth. Through this method, the safety of a hydrostatic thrust bearing having circular cavities multi-pad can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design and lubrication and experience and thermal deformation computation for hydrostatic thrust bearing in the heavy equipment.

Research on Temperature Field Distribution of Heavy Hydrostatic Thrust Bearing Rotation-Workbench at Different Rotating Velocity

2011 ◽  
Vol 239-242 ◽  
pp. 2703-2706
Author(s):  
Jun Peng Shao ◽  
Xiao Dong Yang ◽  
Yun Fei Wang ◽  
Xiao Qiu Xu ◽  
Yan Qin Zhang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Temperature Field ◽  
Field Distribution ◽  
Thrust Bearing ◽  
State Equation ◽  
Temperature Field Distribution ◽  
Hydrostatic Bearing ◽  
Average Temperature ◽  
Heat Transfer Theory

Based on heat transfer theory, thermodynamics steady state equation of hydrostatic bearing, thermal mathematical model of hydrostatic bearing and boundary condition of numerical simulation is established. Temperature field distribution of hydrostatic bearing at different velocity is numerical simulated. Regularity of the influence of velocity on temperature field of heavy hydrostatic thrust bearing is revealed. The results show that, velocity impacted a significant influence on heat transfer and temperature field distribution of hydrostatic bearing. Average temperature of workbench steadily declined as velocity increasing, while average temperature of base gradually increased; both of them emerged serious heat concentration, but the cooling situation of workbench is better than base. The numerical simulation results could provide theoretical basis for temperature control scheme design which will improve the stability and reliability during hydrostatic bearing operation.

Viscosity Influence Research on Load Capacity of Heavy Hydrostatic Bearing

2010 ◽  
Vol 450 ◽  
pp. 63-66 ◽  
Author(s):  
Yan Qin Zhang ◽  
Xiao Dong Yu ◽  
Xiao Dong Yang ◽  
Gui Tao Sun ◽  
Xiao Yang Yu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Variable Viscosity ◽  
Load Capacity ◽  
Rotational Velocity ◽  
Hydrostatic Bearing ◽  
Heavy Equipment ◽  
Bearing Design ◽  
A Minor ◽  
Volume Method ◽  
Lubricant Viscosity

Lubricant viscosity is one of the key parameters in hydrostatic bearing research. In order to solve the load capacity of hydrostatic bearing in the heavy equipment, viscosity-temperature equation of lubricant film is established, and the viscosity-temperature curve is fitted by B-Spline curve. Finite volume method is used on numerical simulation of pressure field of heavy hydrostatic bearing in constant and variable viscosity respectively and in different rotational velocity, whereafter, viscosity influence on load capacity of heavy hydrostatic bearing is discussed. The results show that, viscosity impose a minor influence on cavity pressure of hydrostatic bearing when rational velocity is low; whereas, when rational velocity is high, especially to the heavy hydrostatic bearing which with high liner velocity influence of viscosity changing must be taken into account in calculation. Numerical simulation results reflect the pressure distributing state of bearing veritably; furthermore, these provide theoretical basis for hydrostatic bearing design and lectotype in practical application.

Numerical Simulation and Analysis of 3D Flow Field in New Different-Speed Mixer

2013 ◽  
Vol 561 ◽  
pp. 331-335
Author(s):  
Ya Lan Zhang ◽  
Yun Wu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Theoretical Basis ◽  
Maximum Shear Stress ◽  
Structure Design ◽  
3D Flow ◽  
Ansys Fluent ◽  
Value Flow ◽  
And Performance ◽  
Material Form

A simulation model of the flow field in the different-speed mixer was built based on UG software in this paper. The characteristics which including the pressure value, flow rate and maximum shear stress were analyzed by the ANSYS-Fluent, as well as the variation of the material form. The results of the analysis provide theoretical basis for the reasonable structure design and performance analysis of the different-speed mixer.

Research on Propagation Numerical Simulation of Blast Shock Waves in Subway Station

2013 ◽  
Vol 380-384 ◽  
pp. 1725-1728
Author(s):  
Yang Hu ◽  
Huai Yu Kang
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Experimental Study ◽  
Shock Waves ◽  
Theoretical Basis ◽  
Damage Effect ◽  
Subway Station ◽  
Element Calculation ◽  
Dynamic Finite Element ◽  
Walking Pattern

In this paper, we Research on Propagation Numerical Simulation and damage effect of Blast Shock Waves in Subway Station by using LS-DYNA dynamic finite element calculation program , the results reproduce the formation process of the explosive flow field, and analysis the shock wave waveform, attenuation and walking pattern, provides the theoretical basis for further experimental study.

Simulation and Analysis of Swing Motion of Lifting Load System on Rescue Vehicle

2012 ◽  
Vol 538-541 ◽  
pp. 725-729
Author(s):  
Han Ming Liu ◽  
Heng Zhao ◽  
Ning Li
Keyword(s):  
Numerical Simulation ◽  
Theoretical Basis ◽  
Safety Assessment ◽  
Kinematic Model ◽  
Excitation Frequency ◽  
Lagrange’S Equation ◽  
Set Up

In lifting, remoted operated dive vehicle（ROV） may swing with the effect of wave. Based on the general form of Lagrange’s equation, a 3-DOF nonlinear swing motion kinematic model was set up. The kinematic response was studied using methods of numerical simulation. The results demonstrated that the kinematic response depends on the length of cable, lifting speed and excitation frequency. Conclusions drawn from this work can be used for safety assessment and theoretical basis for lifting ROV.

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