Research on the influence of air-gap eccentricity on the temperature field of a motorized spindle

Xiao-hu, LI; Liu, Jinyu; Cui, Li; Hong, Jun; Wang, Dongfeng

doi:10.5194/ms-12-109-2021

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…Cao, Y. et al [15] analyzed the loss and temperature of the hybrid magnetic bearings (HMB), and the results showed that the loss of HMB is mainly distributed in the rotor part, and the temperature of the rotor part is obviously higher than that of the stator part. Li et al [16] established the thermal model of the motorized spindle and simulated the steady-state temperature field of the motorized spindle by using ANSYS. Zhai et al [17] established the prediction models of iron loss and copper loss for magnetic bearings and BLDCM and determined the loss coefficients of iron core by measured loss curves at different frequencies.…”

Section: Of 20mentioning

confidence: 99%

Simulation and Experiment Analysis of Temperature Field of Magnetic Suspension Support Based on FBG

Cong

Cui

et al. 2022

Sensors

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Temperature rise is an important factor limiting the development of magnetic suspension support technology. Traditional temperature sensors such as thermocouples are complicated and vulnerable to electromagnetic interference due to their point contact temperature measurement methods. In this paper, the equivalent model of magnetic suspension support is established, and the temperature field is simulated and analyzed by magnetic thermal coupling calculation in ANSYS software. Then, a quasi-distributed temperature measurement system is designed, and the FBG temperature sensor is introduced to measure the temperature of the magnetic suspension support system by “one-line and multi-point”. By comparing the analysis experiments and simulations, the equivalent accuracy of the simulation model and the FBG temperature sensor can accurately measure the temperature of the magnetic suspension support.

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Section: Of 20mentioning

confidence: 99%

Simulation and Experiment Analysis of Temperature Field of Magnetic Suspension Support Based on FBG

Cong

Cui

et al. 2022

Sensors

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“…where n is total number of discrete disks, f is friction force of the system, T is component of electromagnetic force transmitted in the axial direction, Q is shear force, F n and M n are external force and torque of the system, respectively, E is the elastic modulus, C i is the damping of the bearing inner ring, C b is the damping of the bearing ball, I is the rotational inertia of y axis, and J is the rotational inertia of z axis. The Lagrangian energy method iterative equation is given in equation (49), 5,13,14 d dt…”

Section: Dynamic Model Of Ceramic Angular Contact Bearingmentioning

confidence: 99%

“…Liu et al 12 studied the axial vibration of high-speed motorized spindle, and established a high-speed motorized spindle rotor-bearing dynamics model using the finite element method and analyzed the inherent characteristics of the system. Li et al 13 conducted a theoretical analysis and experimental study with the nonlinear dynamics of rotor-bearing system, analyzed the whole system with bifurcation diagram, waterfall diagram, and Poincaré diagram. Xi et al 14 established a nonlinear dynamics model of a five-degree-of-freedom angular contact ball-axis rotor bearing system with improved ball bearing dynamics.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic characteristics of full-ceramic motorized spindle considering axial transfer of unbalanced magnetic pull

Zhang

Liqi

Zhan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Full-ceramic motorized spindle is suitable for high-grade CNC machine tool due to its high stiffness and wear resistance, while axial transfer of unbalanced magnetic pull (UMP) caused by reverse magnetic characteristic leads to random vibration at the shaft end. In order to investigate the nonlinear dynamics of full-ceramic motorized spindles under the influence of reverse magnetic, a five-degree-of-freedom dynamic model of bearing-rotor system considering the axial transfer of UMP is constructed. The improved transfer matrix method is proposed to establish the axial transfer model of UMP and the vibration mode of the shaft is obtained. The dynamic characteristics of the bearing-rotor system are analyzed considering the effect of UMP. The magnetic field density and vibration characteristics of the motorized spindle system is studied, and the full-ceramic motorized spindle shaft influence of UMP axial transfer, the vibration of the rotor tends to decrease from inward to outward, while the shaft end vibration also tends to increase gradually with the increase of rotation speed and eccentricity value. The results show that the vibration of ceramic shaft end is 55.4% weaker than that of metal shaft end. It can be seen that under the action of the diamagnetic property, UMP transfer occurs on the ceramic shaft, which reduces the vibration. The experiments show that the average error between the calculated value and the experimental result is 8.5% at the operating speed, which verifies the accuracy of the model developed in this paper.

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“…Li et al employed ANSYS software to study influences of the air-gap state between the stator and rotor of a motorized spindle on the steady-state thermal deformation of the motorized spindle. 3 Xu and Fan combined the finite element method and digital twinning to improve the simulation accuracy for thermal errors of a motorized spindle by mapping and modifying the thermal boundary conditions including the thermal contact resistance. 4 Deng et al established a coupling analysis model for the spindle-vertical column system of a machine tool using the finite element software and obtained key thermal properties of the model, including the thermal equilibrium time.…”

Section: Introductionmentioning

confidence: 99%

Prediction of thermal errors in a motorized spindle in CNC machine tools by applying loads based on heat flux

Haoshuo

Chen

Sun

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The thermal errors of a motorized spindle are seen as a source of significant errors in computer numerical control (CNC) machine tools, and motion errors, geometrical errors, among others, that are consequences of the thermal errors in the spindle. A predictive model of the thermal errors of a motorized spindle is proposed using a loading method based on heat flux. At first, a finite element model for the steady-state and transient thermal-structure coupling analysis of a motorized spindle is established, in which the loading method based on heat flux is adopted to assign the total amount of heat to the ball, an inner race, and an outer race of angular-contact ball bearing proportionally. The response values of sample points are obtained by simulation, and then a response surface model for the prediction of the steady-state elongation of the spindle thermal deformation under the influences of four factors including rotational speed of a bearing, coolant temperature, ambient temperature, and preload is constructed. The simulation and experimental results indicate that predictive error of the steady-state elongation of the spindle thermal deformation is only 3.81 μm, and the thermal equilibrium time in the transient thermal-structure coupling analysis is almost same to the experimental result. The response surface model can predict steady-state errors arising from the changes in working conditions and corresponding changes of the spindle.

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Research on the influence of air-gap eccentricity on the temperature field of a motorized spindle

Cited by 7 publications

References 16 publications

Simulation and Experiment Analysis of Temperature Field of Magnetic Suspension Support Based on FBG

Simulation and Experiment Analysis of Temperature Field of Magnetic Suspension Support Based on FBG

Nonlinear dynamic characteristics of full-ceramic motorized spindle considering axial transfer of unbalanced magnetic pull

Prediction of thermal errors in a motorized spindle in CNC machine tools by applying loads based on heat flux

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