Characteristic Analysis on Heavy Hydrostatic Bearing of DVT500 Vertical Lathe

2012 ◽  
Vol 151 ◽  
pp. 121-125 ◽  
Author(s):  
Xi Bing Li ◽  
Xian Feng Du ◽  
Shi Gang Wang ◽  
Dong Sheng Li ◽  
Yue Qiang Yu
Keyword(s):  
Temperature Field ◽  
Product Quality ◽  
Rotational Speed ◽  
Optimization Design ◽  
Pressure Field ◽  
Fluid Pressure ◽  
Decisive Role ◽  
Characteristic Analysis ◽  
Hydrostatic Bearing ◽  
Finite Element Software

With increasing demands for product quality, and the performance of assembly equipment plays a decisive role for product quality, national experts and scholars conduct in-depth research on the performance of the assembly equipment. In this paper, a research simulation on hydrostatic bearing performance of heavy-duty vertical lathes DVT(digital vertical tool) 500 is carried out by using finite element software FLUENT to simulate the fluid pressure field and temperature field distribution of sector oil recess at different work platform rotational speed. The law of these field distributions is also obtained. The results show that: the rotational speed of the work platform has a greater impact on pressure field and temperature field of gap fluid flow. Numerical results can reflect the true hydrostatic bearing fluid movement, the actual simulation results provide a theoretical basis for optimization design of the Engineering hydrostatic bearing oil cavity.

Research on Hydrostatic Supporting Temperature-Rise of Heavy NC Machine Tool

2013 ◽  
Vol 274 ◽  
pp. 132-135 ◽  
Author(s):  
Yan Qin Zhang ◽  
Rui Li ◽  
Chun Xi Dai ◽  
Jun Peng Shao ◽  
Xiao Dong Yang ◽  
...  
Keyword(s):  
Temperature Field ◽  
Machine Tool ◽  
Optimization Design ◽  
Thrust Bearing ◽  
Effective Control ◽  
Fluid Temperature ◽  
Oil Film ◽  
Hydrostatic Bearing ◽  
Nc Machine Tool ◽  
Nc Machine

With heavy NC machine tool is widely used in many oil pad round guide hydrostatic bearing as the research object, in the under condition of variable viscosity, establish oil film viscosity-temperature equation. Adopt finite volume method, simulation the hydrostatic bearing internal fluid temperature field under different flow rates on the speed of 6R / min. Numerical simulation hydrostatic thrust bearing oil film temperature field, can find a general high temperature region, and then take effective control temperature. It can achieve the hydrostatic thrust bearing oil film temperature field prediction for engineering practical oil chamber structure, offer the theoretical foundation for optimization design.

scholarly journals CFD Simulation and Experimental Study of Working Process of Screw Refrigeration Compressor with R134a

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2054 ◽  
Author(s):  
Huagen Wu ◽  
Hao Huang ◽  
Beiyu Zhang ◽  
Baoshun Xiong ◽  
Kanlong Lin
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Cfd Simulation ◽  
Pressure Field ◽  
Fluid Pressure ◽  
Three Dimensional ◽  
Thermodynamic Characteristics ◽  
Partial Load ◽  
Twin Screw ◽  
Refrigeration Compressor

Twin-screw refrigeration compressors have been widely used in many industry applications due to their unique advantages. The performance of twin-screw refrigeration compressors is generally predicted by one-dimensional numerical simulation or empirical methods; however, the above methods cannot obtain the distribution of the fluid pressure field and temperature field inside the compressor. In this paper, a three-dimensional model was established based on the experimental twin-screw refrigeration compressor. The internal flow field of the twin-screw compressor was simulated by computational fluid dynamics (CFD) software using structured dynamic grid technology. The flow and thermodynamic characteristics of the fluid inside the compressor were analyzed. The distribution of the internal pressure field, temperature field, and velocity field in the compressor were obtained. Comparing the P-θ indicator diagram and the performance parameters of the compressor with the experimental results, it was found that the results of the three-dimensional numerical simulation were consistent with the experimental data. The maximum error was up to 2.578% on the adiabatic efficiency at the partial load working condition. The accuracy of the 3D numerical simulation of the screw compressors was validated and a new method for predicting the performance of twin-screw refrigeration compressors was presented that will be helpful in their design.

Analysis of the Thermal-Structure Coupling of the Band Brake

2011 ◽  
Vol 121-126 ◽  
pp. 499-503
Author(s):  
Fu Cai Hu ◽  
Hu Lin Li ◽  
Bei Si Xie
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Stress Field ◽  
Failure Mechanism ◽  
Optimization Design ◽  
3D Model ◽  
Thermal Structure ◽  
Nonlinear Coupling ◽  
Finite Element Software ◽  
Braking Process

A 3D model of band brake is established with PRO/E software, and its thermal-structure nonlinear coupling is analyzed with finite element software MSC.Marc. Temperature field and stress field distribution of the brake band and the friction linings in braking process are calculated, and the failure mechanism of the connecting bolt is analyzed. All these provide references for optimization design.

Characteristic Study on Temperature Field of Hydrostatic Bearing of Hydroforming Machine

2012 ◽  
Vol 605-607 ◽  
pp. 630-635
Author(s):  
Shi Gang Wang ◽  
Xian Feng Du ◽  
Dong Sheng Li ◽  
Qing Ming Hu
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Temperature Field ◽  
Development Time ◽  
Hydrostatic Bearing ◽  
Finite Element Software ◽  
Theoretical Support ◽  
The Relationship

Temperature field of hydrostatic bearing of hydroforming machine is studied in this paper,SOLIDWORKS2009 is used to model the simulational modeling of hydrostatic bearing of hydroforming machine, and then experiments based on hydroforming machine is conducted by using the finite element software FLUENT6.3 and GAMBIT, with the simulational results that the temperature field of hydrostatic bearing. Finally, the relationship between temperature field and angle-velocity is concluded by analyzing the simulational experiments results. The simulational results provide theoretical support and effective conference for the optimized layout of the heat transfer of hydrostatic bearing with heat transfer, which will reduce the experimental costs and the development time of the hydrostatic bearing.

Study on Capacity of Vertical Lathe for Heavy Hydrostatic Bearing

2014 ◽  
Vol 800-801 ◽  
pp. 559-563
Author(s):  
Shi Gang Wang ◽  
Zi Jian Qiu ◽  
Dong Sheng Li
Keyword(s):  
Optimization Design ◽  
Pressure Field ◽  
Geometric Model ◽  
Engineering Practice ◽  
Cavity Pressure ◽  
Hydrostatic Bearing ◽  
Cavity Structure ◽  
Calculation Results ◽  
Pressure Peak ◽  
Constant Improvement

For DVT500 vertical lathe of the carrying capacity of heavy hydrostatic bearing problem, Through the simplification of the geometric model of a single oil pad to derive the effective bearing area of a single oil pad, then establish its mathematical model, for the following to prepare for the simulation of heavy hydrostatic bearing, and through the simulation of heavy hydrostatic bearing, get the input under the condition of unchanged, with the constant improvement of the speed, the change of heavy hydrostatic bearing pressure field. Results show that the feed quantity under the condition of unchanged, with the constant improvement of the speed, start from the center of the biggest oil cavity pressure peak around gradually diminishing, isobar and high oil and shape of cavity shape basically the same. Numerical calculation results reflect the inside of the bearing pressure distribution, the simulation results for the engineering practice the bearing oil cavity structure optimization design provides a theoretical basis.

Cooling Performance Analysis of the Permanent Magnet Motor

2015 ◽  
Vol 789-790 ◽  
pp. 779-783
Author(s):  
Wan Liu ◽  
Hai Rong Zou ◽  
Shou Jie Tang ◽  
Peng Wang
Keyword(s):  
Temperature Field ◽  
Permanent Magnet ◽  
Optimization Design ◽  
Simulation Analysis ◽  
Permanent Magnet Motor ◽  
Cooling Performance ◽  
Finite Element Software ◽  
Fluid Field ◽  
Shell Optimization ◽  
Motor Model

This paper built 3D motor model by SolidWorks, using finite element software Fluent to simulate the temperature field and fluid field of the permanent magnet motor. The cooling effect of “C” type structure with different radiating rib was analyzed in this paper. Simulation analysis of motor temperature rise was carried out under different inlet flow. It provides a reference for the further study of motor shell optimization design.

Static and Dynamic Characteristic Analysis of the Tower for Vertical Axis Wind Turbine Based on Finite Element Method

2012 ◽  
Vol 229-231 ◽  
pp. 613-616
Author(s):  
Yan Jue Gong ◽  
Yuan Yuan Zhang ◽  
Fu Zhao ◽  
Hui Yu Xiang ◽  
Chun Ling Meng ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Wind Turbine ◽  
Dynamic Characteristic ◽  
Optimization Design ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Characteristic Analysis ◽  
Support Structure ◽  
Element Method

As an important part of the vertical axis wind turbine, the support structure should have high strength and stiffness. This article adopts finite element method to model a kind of tower structure of the vertical axis wind turbine and carry out static and modal analysis. The static and dynamic characteristic results of tower in this paper provide reference for optimization design the support structure of wind turbine further.

Numerical Modeling and Simulation Analysis of Temperature Field of Disc Brake on Trains

2011 ◽  
Vol 199-200 ◽  
pp. 1492-1495 ◽  
Author(s):  
Guo Shun Wang ◽  
Rong Fu ◽  
Liang Zhao
Keyword(s):  
Temperature Field ◽  
Temperature Gradient ◽  
High Speed ◽  
Large Scale ◽  
Working Condition ◽  
Constant Speed ◽  
Brake Disc ◽  
Disc Brake ◽  
Brake Pad ◽  
Finite Element Software

The simulation calculation on the temperature field of the disc brake system on high-speed trains under the working condition of constant speed at 50Km/h is made. A steady-state calculation model is established according to the actual geometric size of a brake disc and a brake pad, and the analog calculation and simulation on the temperature field of the brake disc and the brake pad by using the large-scale nonlinear finite element software ABAQUS are carried out. The distribution rules of the temperature field of the brake disc and the brake pad under the working condition of constant speed are made known. The surface temperature of the brake disc at friction radius is the highest, with a band distribution for temperature. There exists a temperature flex point in the direction of thickness, of which the thickness occupies 15% of that of the brake disc; due to the small volume of the brake pad, the temperature gradient of the whole brake pad is not sharp, and larger temperature gradient occurs only on the contact surface.

Analysis on Temperature Field of Work-Piece during Cross Wedge Rolling

2011 ◽  
Vol 230-232 ◽  
pp. 352-356
Author(s):  
Wen Ke Liu ◽  
Kang Sheng Zhang ◽  
Zheng Huan Hu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Metal Flow ◽  
Work Piece ◽  
Contact Deformation ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Rigid Plastic ◽  
Finite Element Software ◽  
Deform 3D

Based on the rigid-plastic deformation finite element method and the heat transfer theories, the forming process of cross wedge rolling was simulated with the finite element software DEFORM-3D. The temperature field of the rolled piece during the forming process was analyzed. The results show that the temperature gradient in the outer of the work-piece is sometimes very large and temperature near the contact deformation zone is the lowest while temperature near the center of the rolled-piece keeps relatively stable and even rises slightly. Research results provide a basis for further study on metal flow and accurate shaping of work-piece during cross wedge rolling.

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