The aim of this paper is to model the steady-state condition of a rotary shaft seal (RSS) system. For this, an iterative thermal-mechanical algorithm was developed based on incremental finite element analyzes. The beh...The aim of this paper is to model the steady-state condition of a rotary shaft seal (RSS) system. For this, an iterative thermal-mechanical algorithm was developed based on incremental finite element analyzes. The behavior of the seal’s rubber material was taken into account by a large-strain viscoelastic, so called generalized Maxwell model, based on Dynamic Mechanical Thermal Analyses (DMTA) and tensile measurements. The pre-loaded garter spring was modelled with a bilinear material model and the shaft was assumed to be linear elastic. The density, coefficient of thermal expansion and the thermal conductance of the materials were taken into consideration during simulation. The friction between the rotary shaft seal and the shaft was simplified and modelled as a constant parameter. The iterative algorithm was evaluated at two different times, right after assembly and 1 h after assembly, so that rubber material’s stress relaxation effects are also incorporated. The results show good correlation with the literature data, which state that the permissible temperature for NBR70 (nitrile butadiene rubber) material contacting with ~80 mm shaft diameter, rotating at 2600/min is 100°C. The results show 107°C and 104°C for the two iterations. The effect of friction induced temperature, changes the width of the contact area between the seal and the shaft, and significantly reduces the contact pressure.展开更多
The online detection of metal shaft parameters,such as torque,power and deformation,is widely applied in engineering projects.The power supply of metal shafts is the key to the detection reliability and practicality.H...The online detection of metal shaft parameters,such as torque,power and deformation,is widely applied in engineering projects.The power supply of metal shafts is the key to the detection reliability and practicality.However,traditional slip ring and battery power supply are limited in reliability and service life.In this paper,a side-mounted inductive power supply system for the rotating metal shaft is designed by using a Utype core.The equivalent reluctance and circuit models of the system are analyzed,and the methods of improving the coupling coefficient and transmission efficiency are proposed from theoretical analysis.Through the finite element simulation analysis of the system,the general relationships between the transmission power and efficiency of the system and the number of coil turns,the working frequency and the load are analyzed.The accuracy of theoretical analysis and simulation analysis is verified by the practical power transmission experiments.This paper provides a novel and reliable power supply method for inductive power supply of rotating equipment,and enriches the solutions of rotating power supply.展开更多
文摘The aim of this paper is to model the steady-state condition of a rotary shaft seal (RSS) system. For this, an iterative thermal-mechanical algorithm was developed based on incremental finite element analyzes. The behavior of the seal’s rubber material was taken into account by a large-strain viscoelastic, so called generalized Maxwell model, based on Dynamic Mechanical Thermal Analyses (DMTA) and tensile measurements. The pre-loaded garter spring was modelled with a bilinear material model and the shaft was assumed to be linear elastic. The density, coefficient of thermal expansion and the thermal conductance of the materials were taken into consideration during simulation. The friction between the rotary shaft seal and the shaft was simplified and modelled as a constant parameter. The iterative algorithm was evaluated at two different times, right after assembly and 1 h after assembly, so that rubber material’s stress relaxation effects are also incorporated. The results show good correlation with the literature data, which state that the permissible temperature for NBR70 (nitrile butadiene rubber) material contacting with ~80 mm shaft diameter, rotating at 2600/min is 100°C. The results show 107°C and 104°C for the two iterations. The effect of friction induced temperature, changes the width of the contact area between the seal and the shaft, and significantly reduces the contact pressure.
基金the National Natural Science Foundation of China(No.51475306)。
文摘The online detection of metal shaft parameters,such as torque,power and deformation,is widely applied in engineering projects.The power supply of metal shafts is the key to the detection reliability and practicality.However,traditional slip ring and battery power supply are limited in reliability and service life.In this paper,a side-mounted inductive power supply system for the rotating metal shaft is designed by using a Utype core.The equivalent reluctance and circuit models of the system are analyzed,and the methods of improving the coupling coefficient and transmission efficiency are proposed from theoretical analysis.Through the finite element simulation analysis of the system,the general relationships between the transmission power and efficiency of the system and the number of coil turns,the working frequency and the load are analyzed.The accuracy of theoretical analysis and simulation analysis is verified by the practical power transmission experiments.This paper provides a novel and reliable power supply method for inductive power supply of rotating equipment,and enriches the solutions of rotating power supply.
