scholarly journals Dynamics of Switched Reluctance Linear Tubular Motor for Reciprocating Water Pump

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 430
Author(s):  
Krzysztof Dyrcz ◽  
Mariusz Kubiczek ◽  
Ernest A. Mendrela ◽  
Piotr Derugo
Keyword(s):  
Driving Force ◽  
Fem Simulation ◽  
Power Source ◽  
Water Pump ◽  
Reciprocating Motion ◽  
Switched Reluctance ◽  
Photovoltaic Power ◽  
Simulation Results ◽  
Piston Stroke ◽  
Water Pumps

Simple, cheap, and efficient water pumps are needed in developing countries. A reciprocating water pump driven by a switched reluctance linear tubular motor with double pistons that can be supplied from a photovoltaic power source seems to respond to this demand. This type of new motor (one with reciprocating motion) is presented in the paper. In order to develop a strong driving force at two extreme piston positions and achieve a long piston stroke, a double coil motor with a double secondary and two springs is proposed. Simulation results of force, current, and voltage waveforms obtained using MATLAB/Simulink are presented. The electromagnetic forces and coil inductances, which depended on the current and the secondary positions of the pistons, were determined using FEM. Simulation results are compared with those obtained from an experiment carried out on the motor prototype.

Fem Simulation of Micro-Rotating-Structures and Their Applications in Measurement of Residual Stresses in Thin Films

1997 ◽  
Vol 505 ◽  
Author(s):  
Xin Zhang ◽  
Tong-Yi Zhang ◽  
Yitshak Zohar
Keyword(s):  
Thin Films ◽  
Residual Stresses ◽  
Fem Simulation ◽  
Sensitivity Factor ◽  
Local Measurement ◽  
Micro Structure ◽  
Micro Raman Spectroscopy ◽  
Before And After ◽  
Polysilicon Films ◽  
Simulation Results

ABSTRACTFEM simulation of micro-rotating-structures was performed for local measurement of residual stresses in thin films. A sensitivity factor is introduced, studied and tabulated from the simulation results. The residual stress can be evaluated from the rotating deflection, the lengths of rotating and fixed beams, and the sensitivity factor. The micro-structure technique was applied to measure residual stresses in both silicon nitride and polysilicon thin films, before and after rapid thermal annealing (RTA), and further confirmed by wafer curvature method. Residual stresses in polysilicon films at different RTA stages were also characterized by micro-Raman spectroscopy (MRS). The experimental results indicate that micro-rotating-structures indeed have the ability to measure spatially and locally residual stresses in MEMS thin films with appropriate sensitivities.

Study on the Steering Performance of Dual-Motor Drive Track Bulldozer

2013 ◽  
Vol 427-429 ◽  
pp. 133-136
Author(s):  
Qiang Song ◽  
Pu Zeng
Keyword(s):  
Simulation Model ◽  
Dynamic Characteristics ◽  
Driving Force ◽  
Driving Forces ◽  
Small Radius ◽  
Motor Drive ◽  
Matlab Simulink ◽  
Simulation Results ◽  
Two Sides

The driving theory and the dynamic characteristics of small radius steering, medium radius steering and big radius steering is analyzed, and the simulation model is established under Matlab/Simulink. Then the track bulldozers steering performance of the three sheerings is simulated. The results show that, at different steering modes, the running states of the two sides driving motors are not the same, and the track driving forces of the two sides vary widely. The track driving force is great in the small radius steering model, while small in the medium and big radius steering models. The simulation results lay the foundation for dual-motor drive track bulldozers steering performance matching.

Effect of the Load Path on Formability of T-Shaped Tube Hydroforming

2011 ◽  
Vol 101-102 ◽  
pp. 962-965 ◽  
Author(s):  
Wen Liu ◽  
Ji Qiang Li ◽  
Bin Bin Chen ◽  
Zhi Xin Jia
Keyword(s):  
Tube Hydroforming ◽  
Fem Simulation ◽  
Evaluation Index ◽  
Load Path ◽  
Line Load ◽  
Evaluation Indexes ◽  
Shaped Tube ◽  
Simulation Results

Based on the analysis of now available evaluation indexes to estimate the formability of T-shaped tube hydroforming, an aggregative indicator is proposed. The effect of load path on the formability of T-shaped tube is discussed by FEM simulation, and validity of the evaluation index and simulations are proved by experiment. Results show that with the broken line load path of 0-35-35-60, the value of aggregative indicator is the greatest and the formability is the best. The optional parameters are testified by experiment and the results are in agreement with the FEM simulation results.

Seal Lubrication of an Automotive Water Pump

Tribology ◽  
2006 ◽  
Author(s):  
Massimo Antonini ◽  
Rodolfo Faglia ◽  
Carlo Remino ◽  
Marco Pedersoli
Keyword(s):  
Acoustic Emission ◽  
Theoretical Model ◽  
Working Conditions ◽  
Automotive Industry ◽  
Dynamic Instability ◽  
Mechanical Seal ◽  
Water Pump ◽  
Stick Slip ◽  
Grave Problem ◽  
Water Pumps

A noisy mechanical seal is a grave problem, especially in water pumps designed for the automotive industry. The noisiness is often caused by dynamic instability (stick-slip behavior), which occurs when the seal lubrication changes from hydrodynamic to mixed. Starting from this hypothesis, the paper shows a theoretical model that describes the interaction between the seal disks. Therefore this model correlates the acoustic emission to the working conditions of the water pump.

A Research of Actuators for Micromirror Control

2003 ◽  
Author(s):  
Hiroki Mamiya ◽  
Koji Ishikawa ◽  
Qiang Yu
Keyword(s):  
Fem Simulation ◽  
Statistical Design ◽  
Vertical Displacement ◽  
Operating Voltage ◽  
Torsional Motion ◽  
Surface Method ◽  
Design Support System ◽  
Simulation Results ◽  
Twisting Angle ◽  
Motion Design

In this paper, a new thermal actuator for micromirror control with very low operating voltage is described. The actuator consists of three straight polysilicon cantilever arms and a polysilicon winding arm that is inherently twisted due to stress-induced bending. Controlling heat generating positions in those arms, the actuator shows both torsional and vertical motions. Mechanical-electro-thermal FEM simulation results show that the actuator has more than a 1.11 degree twisting angle and a 2.31 μm vertical displacement. In order to enhance torsional motion, design optimization is carried out by using a response surface method called the statistical design support system. After optimization, the total twisting angle improves to 2.05 degrees which is enough to actuate micromirrors for optical beam adjusting, switching and attenuating.

The Use of Water and Water Pumps in Archaeological Excavations

1973 ◽  
Vol 38 (2) ◽  
pp. 218-220
Author(s):  
Richard G. Sense
Keyword(s):  
Gasoline Engine ◽  
Archaeological Site ◽  
Water Pump ◽  
Centrifugal Pumps ◽  
Water Pumps ◽  
Archaeological Excavations ◽  
Dependable Source

AbstractIf an archaeological site is situated near a dependable source of water, a water pump with attached hoses can be utilized to deliver water to screen excavated fill. Screening with water results in the recovery of more and a greater variety of artifacts and non-artifactual materials, and saves time and money. Gasoline-engine powered centrifugal pumps are recommended for most projects.

The Influence of Rotor Bar Wear of Impact Crusher on Impact Effect

2010 ◽  
Vol 42 ◽  
pp. 135-138 ◽  
Author(s):  
Shu Juan Cao ◽  
Hai Zhang ◽  
Sen Li
Keyword(s):  
Impact Force ◽  
Fem Simulation ◽  
Data Simulation ◽  
Simulation Data ◽  
Impact Effect ◽  
Large Influence ◽  
Initial Stage ◽  
Simulation Results ◽  
Experiment And Simulation

The influence of the wear of the rotor bar on its impact effect was investigated with FEM simulation. The effectiveness of FEM simulation on the research of impact force was verified through the comparison of experiment and simulation data. Simulation results showed that the wear of rotor bar has not so large influence on impact force. In its initial stage, the bar is worn easily, and the wear becomes slow with the wear increasing.

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