Simulation on Pressure Field of Gap Oil Film in Constant Flow Hydrostatic Center Frame

2013 ◽  
Vol 427-429 ◽  
pp. 289-292
Author(s):  
Xiao Dong Yu ◽  
Hong Ying Li ◽  
Xiu Li Meng ◽  
Li Tan ◽  
Zhi Qiang Wang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Pressure Field ◽  
Three Dimensional ◽  
Constant Flow ◽  
Cavity Pressure ◽  
Distribution Law ◽  
Simulation Research ◽  
Oil Film ◽  
Simulation Results ◽  
Volume Method

In order to solve the force deformation of the hydrostatic center frame in the heavy type horizontal lathe, a simulation research concerning pressure field of hydrostatic center frame was described. The Finite Volume Method of CFX has been used to compute three-dimensional pressure field of gap fluid between the rotation workpiece and bearing pillow. This research theoretically analyzes the influence of angular velocity on the bearing pressure performance according to lubricating theory and computational fluid dynamics, and it has revealed its pressure distribution law of gap oil film. The simulation results indicate that an improved characteristic will be affected by rotating velocity easily, and oil cavity pressure creases by gradually with rotating velocity enhancing. Through this method, it can provide reasonable data for design, lubrication, experience and force deformation computation for hydrostatic center frame in the heavy type horizontal lathe.

Simulation on Temperature Field of Gap Oil Film in Constant Flow Hydrostatic Center Frame

2011 ◽  
Vol 121-126 ◽  
pp. 4706-4710
Author(s):  
Yong Hai Li ◽  
Xiu Li Meng ◽  
Xiao Dong Yu ◽  
Bo Wu ◽  
Chun Li Gao ◽  
...  
Keyword(s):  
Temperature Field ◽  
Angular Velocity ◽  
Thermal Deformation ◽  
Three Dimensional ◽  
Constant Flow ◽  
Distribution Law ◽  
Simulation Research ◽  
Oil Film ◽  
Temperature Performance ◽  
Volume Method

In order to solve the thermal deformation of the hydrostatic center frame in the heavy type horizontal lathe, a simulation research concerning temperature field of hydrostatic center frame is described. The Finite Volume Method of CFX has been used to compute three-dimensional temperature field of gap fluid between workpiece and bearing pillow. This research theoretically analyzes the influence of angular velocity on the bearing temperature performance according to lubricating theory and computational fluid dynamics, and it has revealed its temperature distribution law of gap oil film. Results indicate that an improved characteristic will be affected by angular velocity easily, and oil cavity temperature increases by gradually with angular velocity enhancing. Through this method, the safety of a hydrostatic center frame can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design, lubrication, experience and thermal deformation computation for hydrostatic center frame in the heavy type horizontal lathe.

Research on Temperature Field of Hydrostatic Thrust Bearing with Annular Cavity Multi-Pad

2011 ◽  
Vol 121-126 ◽  
pp. 3477-3481
Author(s):  
Xiao Dong Yu ◽  
Xiu Li Meng ◽  
Bo Wu ◽  
Chun Li Gao ◽  
Zhi Xin Qiu ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Temperature Field ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Three Dimensional ◽  
Distribution Law ◽  
Simulation Research ◽  
Temperature Performance ◽  
Simulation Results ◽  
Volume Method

A simulation research concerning temperature field of hydrostatic thrust bearing having annular cavities multi-pad was described in order to solve the thermal deformation of the hydrostatic thrust bearing with annular cavity multi-pad in the heavy CNC equipment. The Finite Volume Method of CFX 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 rotating velocity 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 will be affected by rotating velocity easily, and oil cavity temperature increases by gradually with rotating velocity enhancing. Through this method, the safety of a hydrostatic thrust bearing having annular cavities multi-pad can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design, lubrication, experience and thermal deformation computation for hydrostatic thrust bearing in the heavy CNC equipment.

Influence Research of Recess Shape on Dynamic Effect of Hydrostatic Thrust Bearing

2013 ◽  
Vol 274 ◽  
pp. 57-60
Author(s):  
Xiao Dong Yu ◽  
Zhen Guo Li ◽  
De Fan Zhou ◽  
Heng Wei Li ◽  
Chun Li Gao ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Pressure Field ◽  
Three Dimensional ◽  
Dynamic Effect ◽  
Loading Capacity ◽  
Simulation Research ◽  
Simulation Results ◽  
Volume Method

This work describes a simulation research concerning dynamic effect of multi-pad hydrostatic thrust bearing having rectangular recess, sector recess, ellipse recess and I-shaped recess in order to solve the loading capacity of the hydrostatic thrust bearing. Three-dimensional pressure field of gap fluid between the rotation worktable and the base has been computed by using the Finite Volume Method. This study theoretically analyzes the influence of recess shape on dynamic effect of the bearing according to computational fluid dynamics and lubricating theory, and the simulation results indicate that an improved characteristic will be affected by recess shape easily. Through this method, the safety of a multi-pad hydrostatic thrust bearing having different cavities can be forecasted, and the optimal loading capacity of such products can be achieved, so it can provide reasonable data for design, lubrication, experience and thermal deformation computation for hydrostatic thrust bearing.

Comparative Study on Pressure Field of Hydrostatic Thrust Bearing with Different Recess Shapes

2014 ◽  
Vol 621 ◽  
pp. 431-436
Author(s):  
Xiao Dong Yu ◽  
Zhi Qiang Wang ◽  
Xiu Li Meng ◽  
Qi Hui Zhou ◽  
Yan Qin Zhang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Comparative Study ◽  
Thrust Bearing ◽  
Pressure Field ◽  
Three Dimensional ◽  
Distribution Law ◽  
Computational Fluid Dynamics Cfd ◽  
Simulation Results ◽  
Volume Method

A comparative study on pressure field of hydrostatic thrust bearing with sector recess, rectangular recess, ellipse recess and I-shaped recess is carried out in order to solve the deformation of the hydrostatic thrust bearing. The Finite Volume Method has been used to compute three-dimensional pressure field of gap oil film between the rotation worktable and the base. This study theoretically analyzes the influence of recess shape on the bearing pressure characteristic according to Computational Fluid Dynamics (CFD) and lubricating theory. It has revealed its pressure field distribution law. The simulation results indicate that an improved characteristic will be affected by recess shape easily. Through this method, the safety of a hydrostatic thrust bearing with different recesses can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design, lubrication, and experiment and deformation computation for hydrostatic thrust bearing.

Research on Pressure Field of Hydrostatic Center Rest

2013 ◽  
Vol 427-429 ◽  
pp. 262-265
Author(s):  
De Fan Zhou ◽  
Qi Hui Zhou ◽  
Xiu Li Meng ◽  
Xiao Dong Yu ◽  
Zhi Qiang Wang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Pressure Distribution ◽  
Pressure Field ◽  
Rotation Speed ◽  
Three Dimensional ◽  
Mechanical Deformation ◽  
Cavity Pressure ◽  
Distribution Law

In order to solve the mechanical deformation of the hydrostatic center rest, a numerical simulation concerning pressure field of hydrostatic center rest is studied. CFX of ANSYS has been used to compute three-dimensional pressure field of gap fluid between workpiece and bearing pillow. This research analyzes the influence of rotation speed on the bearing pressure performance according to lubricating theory and computational fluid dynamics, and it has revealed its pressure distribution law of gap oil film. Results indicate that an improved characteristic will be affected by rotation speed easily, and oil cavity pressure increases by gradually with rotation speed enhancing. The reliability of a hydrostatic center rest can be predicted through this method.

Influence of Working Parameters on Dynamic Pressure Effect of Heavy Constant Flow Hydrostatic Center Rest

2013 ◽  
Vol 274 ◽  
pp. 82-86
Author(s):  
Bo Wu ◽  
Xiao Dong Yu ◽  
Xue Mei Chang ◽  
Chao Yin
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Pressure Field ◽  
Pressure Effect ◽  
Dynamic Pressure ◽  
Lubricating Oil ◽  
Constant Flow ◽  
Oil Film ◽  
Working Parameters ◽  
Volume Method

In order to increase the working performance of a heavy constant flow hydrostatic center rest, a theoretical study concerning the lubricating oil film dynamic pressure effect of the heavy constant flow hydrostatic center rest is described. The Computational Fluid Dynamics and the Finite Volume Method have been used to compute numerically the static pressure field and the total pressure field of the lubricating oil film. The influences of spindle rotating rate, lubricating oil dynamic viscosity and inlet flow rate on the lubricating oil film dynamic pressure effect of the heavy constant flow hydrostatic center rest were analyzed based on the computational fluid dynamics and lubrication theory, and the influencing laws were revealed. By means of this method, the reasonable data can be provided for reasonably controlling dynamic pressure and structure optimal design of the heavy constant flow hydrostatic center rest.

Numerical Analysis of Internal Flow in Mufflers with Complex Structures

2010 ◽  
Vol 29-32 ◽  
pp. 89-94
Author(s):  
Zhong Cai Zheng ◽  
Na Liu ◽  
Jian Li ◽  
Yan Gao ◽  
Hai Ou Chen
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Numerical Analysis ◽  
Velocity Field ◽  
Pressure Field ◽  
Three Dimensional ◽  
Internal Flow ◽  
Complex Structures ◽  
Simulation Results ◽  
Volume Models

This paper builds three-dimensional finite volume models for 4 different mufflers. Internal flow numerical analysis for mufflers is carried out with computational fluid dynamics software. Velocity field and pressure field are obtained to analyze the airflow influences on muffler performances. The corresponding regularities are obtained from simulation results, which provide a method for design optimization of mufflers.

Simulation Research of Effect of Salinity Wastewater Discharging Ways on Range of Salt Content Rise Nearby the Outfall

2013 ◽  
Vol 777 ◽  
pp. 440-443
Author(s):  
Yao Chen ◽  
Li Li ◽  
Bai Lu Yang ◽  
Chun Long Li
Keyword(s):  
Salt Concentration ◽  
Single Port ◽  
Numerical Models ◽  
Salt Content ◽  
Three Dimensional ◽  
Simulation Research ◽  
Subcritical Flow ◽  
Simulation Results ◽  
Salinity Wastewater ◽  
Better Than

In order to study the effect of salinity wastewater discharging ways on the range of salt content rise nearby the outfall. Two three-dimensional numerical models of discharging ways which were single-port submerged-type and double-port submerged-type in the condition of subcritical flow were researched based on FLUENT. The range of salt content rise of the two discharging ways could be concluded according to the simulation results. The value of maximum salt concentration and average salt concentration of two discharging ways were compared and analyzed. The results showed that double-port submerged-type discharging way was better than single-port submerged-type discharging way.

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.

Influence of Oil-Returning Slot on Load Capacity of Heavy Constant Flow Hydrostatic Center Rest

2014 ◽  
Vol 494-495 ◽  
pp. 633-636
Author(s):  
Bo Wu ◽  
Zhi Huang ◽  
Xiao Dong Yu ◽  
Hui Jiang ◽  
Chun Zhou Wang
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Load Capacity ◽  
Flow State ◽  
Constant Flow ◽  
Heavy Equipment ◽  
Lubrication Performance ◽  
Oil Flow ◽  
Lubrication Characteristics ◽  
Volume Method

In order to increase load capacity of a heavy constant flow hydrostatic center rest, a theoretical study concerning the lubrication performance of the heavy constant flow hydrostatic center rest is described. The Computational Fluid Dynamics and the Finite Volume Method have been used to compute lubrication characteristics, such as the recess pressure and the oil flow state. The influences of oil-returning slot on the load capacity of the heavy constant flow hydrostatic center rest was analyzed based on the computational fluid dynamics and lubrication theory, and the influencing laws were revealed. Through this method, the reasonable data can be provided for optimal design and lubrication performance improving of the constant flow hydrostatic center rest in the heavy equipment.

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