Temperature Field of Electro-Hydraulic Pump with Finite Element Model

2013 ◽  
Vol 373-375 ◽  
pp. 146-153
Author(s):  
Xiao Ning Zhang ◽  
Jing Xue ◽  
Yong Ling Fu ◽  
Zhu Feng Li
Keyword(s):  
Temperature Field ◽  
Heat Conduction ◽  
Thermal Model ◽  
Fluid Model ◽  
Element Model ◽  
Hydraulic Pump ◽  
Full Paper ◽  
Conduction Model ◽  
Depth Study ◽  
Simulation Results

Aim. The full paper begins with a variety of Electro-Hydraulic Pump (EHP) and a review on work of existing hydraulic pump, resulting in, in our opinion, the conclusion that it is absolutely essential to in-depth study on the EHP, a highly integration of electric motor and hydraulic pump. We now present a model how to get temperature field of our design plunger EHP that we believe that it can much better develop the EHP. In the full paper, we explain our method in some detail; in this abstract, we just add some pertinent remarks to naming the topics, such as motor thermal model, the fluid model and the heat conduction model. We discuss the temperature distribution under the different leakage decided by oil film thickness. Finally we do simulations in ANSYS. The simulation results in the full paper show our method for the temperature field is efficient to design the EHP.

scholarly journals Analysis of preheating temperature field characteristics in selective laser sintering

2022 ◽  
Vol 14 (1) ◽  
pp. 168781402110723
Author(s):  
Zhiyong Yang ◽  
Xing Liu ◽  
Zihao Zhang ◽  
Shuting Li ◽  
Qiao Fang
Keyword(s):  
Temperature Field ◽  
Heat Conduction ◽  
Selective Laser Sintering ◽  
Powder Layer ◽  
Uniform Temperature ◽  
Radiation Model ◽  
Conduction Model ◽  
Uniformity Coefficient ◽  
Preheating Temperature ◽  
Uniform Temperature Field

Selective laser sintering technology has broad application prospects in the manufacture of small batch parts with complex structure. In the sintering process, the preheating efficiency and temperature of powder layer determine the processing quality. A method of preheating powder by lamp radiation and tropical heat conduction is proposed in this paper. The thermal radiation model is established, and the angle coefficient is introduced to describe the proportion of radiation energy on the surface of powder layer. Based on the geometric characteristics of the powder cylinder, the heat conduction process is simplified to one-dimensional heat conduction along the radial direction, and the heat conduction model is established. The coupled temperature field under two actions is obtained by combining the heat radiation model with the heat conduction model. The uniformity coefficient [Formula: see text]/[Formula: see text] of the temperature field is defined to represent the uniformity of the preheating temperature field of the powder layer. By comparing the uniformity coefficient [Formula: see text], a more uniform temperature field can be obtained when the height coefficient is 1.8 under combined action. The validity of the model is verified by a comparative experiment with processed water atomized iron powder. Constructing uniform temperature field can effectively reduce the deformation of parts and improve the forming quality.

Simulation of Temperature Field in Selective Laser Sintering on PA6/Cu Composite Powders

2011 ◽  
Vol 213 ◽  
pp. 519-523 ◽  
Author(s):  
Jian Zhang ◽  
De Ying Li ◽  
Bin Qiu ◽  
Long Zhi Zhao
Keyword(s):  
Temperature Field ◽  
Selective Laser Sintering ◽  
Element Model ◽  
Laser Sintering ◽  
Moving Heat Source ◽  
Temperature Field Distribution ◽  
Forming Process ◽  
Composite Powders ◽  
Simulation Results ◽  
Thermal Physical Properties

The 3D transient finite element model in selective laser sintering is established based on ANSYS. The load of moving heat source at different time and locations are achieved by APDL and “element birth/death” technique, and the influence of convection, radiation, latent heat of phase change and thermal physical properties on temperature are taken into account. The temperature field distribution on time in forming process and temperature gradient distributions of pool cross-section are selectively studied, to provide theoretical basis for reasonable process parameters. The SLS experiment on PA6/Cu composite powders is carried out to verify the accuracy of simulation results.

scholarly journals Temperature compensation design and experiment for a giant magnetostrictive actuator

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhangrong Zhao ◽  
Xiaomei Sui
Keyword(s):  
Temperature Field ◽  
Temperature Control ◽  
Control Strategy ◽  
Cooling Water ◽  
Element Model ◽  
Control Device ◽  
Control Effect ◽  
Thermostatic Control ◽  
Magnetostrictive Actuator ◽  
Simulation Results

AbstractBecause the performance of giant magnetostrictive materials (GMMs) can vary at different temperatures, the positioning accuracy of a giant magnetostrictive actuator is affected by heat. In this work, a new simplified control strategy under compulsory water cooling is proposed to maintain a constant GMM temperature. Based on this strategy, a coupled turbulent flow field and temperature field finite element model is created for a GMM smart component. The model is simulated using COMSOL Multiphysics software version 5.3. Through simulations, the temperature field distribution of GMM smart components is analysed under different drive input currents and cooling water flow rates. Based on the obtained simulation results, a GMM intelligent component temperature control device is constructed. The experimental results are in good agreement with the simulation results; a thermostatic control effect is achieved in the thermostat of the giant magnetostrictive rod. Thus, the proposed temperature control strategy is proven effective via simulations and experiments.

scholarly journals Investigation of the Thickness Differential on the Formability of Aluminum Tailor Welded Blanks

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 875
Author(s):  
Jie Wu ◽  
Yuri Hovanski ◽  
Michael Miles
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Numerical Model ◽  
Plastic Strain ◽  
Finite Element Model ◽  
Equivalent Plastic Strain ◽  
Element Model ◽  
Dome Height ◽  
Tailor Welded Blanks ◽  
Simulation Results

A finite element model is proposed to investigate the effect of thickness differential on Limiting Dome Height (LDH) testing of aluminum tailor-welded blanks. The numerical model is validated via comparison of the equivalent plastic strain and displacement distribution between the simulation results and the experimental data. The normalized equivalent plastic strain and normalized LDH values are proposed as a means of quantifying the influence of thickness differential for a variety of different ratios. Increasing thickness differential was found to decrease the normalized equivalent plastic strain and normalized LDH values, this providing an evaluation of blank formability.

scholarly journals Nonlinear Solution to a Non-Fourier Heat Conduction Problem in a Slab Heated by Laser Source

2016 ◽  
Vol 63 (1) ◽  
pp. 129-144
Author(s):  
Mohammad Javad Noroozi ◽  
Seyfolah Saedodin ◽  
Davood Domiri Ganji
Keyword(s):  
Heat Conduction ◽  
Heat Conduction Problem ◽  
Adomian Decomposition Method ◽  
Laser Source ◽  
Temperature Dependent ◽  
Conduction Model ◽  
Non Linear Equation ◽  
Adomian Decomposition ◽  
Non Linear ◽  
Fourier Heat Conduction

Abstract The effect of laser, as a heat source, on a one-dimensional finite body was studied in this paper. The Cattaneo-Vernotte non-Fourier heat conduction model was used for thermal analysis. The thermal conductivity was assumed temperature-dependent which resulted in a non-linear equation. The obtained equations were solved using the approximate-analytical Adomian Decomposition Method (ADM). It was concluded that the non-linear analysis is important in non-Fourier heat conduction problems. Significant differences were observed between the Fourier and non-Fourier solutions which stresses the importance of non-Fourier solutions in the similar problems.

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