Influence of liquid film thickness on bearing characteristics of magnetic-liquid suspension guide-way

Autor: Jianhua Zhao, Bin Zhang, Tao Chen, Qiang Wang, Dianrong Gao
Jazyk: angličtina
Rok vydání: 2018
Předmět:
computerised numerical control
hydrostatics
design engineering
liquid films
magnetic forces
vibrations
mechanical stability
machine bearings
suspensions (mechanical components)
magnetic fluids
machine tools
permanent magnets
elasticity
liquid film thickness
bearing characteristics
magnetic-liquid suspension guide-way
MLSG
double support form
permanent magnetic suspension
bearing capacity
guide-way system
heavy duty CNC machine tool
main influencing factor
hydrostatic system
static index
dynamic index
vibration index
structural characteristics
supporting mechanism
static pressure equation
permanent magnetic force equation
force balance equation
supporting system
static stiffness
dynamic stiffness
vibration characteristics
single DOF supporting performance
Engineering (General). Civil engineering (General)
TA1-2040
Zdroj: The Journal of Engineering (2018)
Druh dokumentu: article
ISSN: 2051-3305
DOI: 10.1049/joe.2018.9010
Popis: The magnetic-liquid suspension guide-way (MLSG) adopts the double support form of permanent magnetic suspension and hydrostatic pressure. It can greatly enhance the bearing capacity and rigidity of the guide-way system. The liquid film thickness is the main influencing factor on both the bearing capacity of the hydrostatic system and the permanent magnetic force. This paper analysed the effect of liquid film thickness on the static, dynamic and vibration index of MLSG. Firstly, this paper introduced the structural characteristics and supporting mechanism of MLSG. Secondly, based on flow equation, the static pressure equation, the permanent magnetic force equation and the force balance equation, the transfer function of single DOF supporting system of MLSG in constant flow supply mode is presented, and analysed the influence of the thickness of liquid film on single DOF supporting performance of MLSG. The results show that with the increase of the thickness of the liquid film, the bearing capacity of guide-way, the static stiffness, the dynamic stiffness and the natural frequency decrease, and the adjust time, the total power loss, the amplitude amplification coefficient increases, the phase margin is almost unchanged. The study can provide a theoretical basis for the design of MLGS in engineering practice.
Databáze: Directory of Open Access Journals
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