Dynamic characteristics analysis of asynchronous motorized spindle considering combined unbalanced magnetic pull and nonlinear bearing restoring force effects

Jin, Hao; Yao, Zhenghong; Li, Changyou; Song, Wenjun; Miao, Huihui; Xu, Ming; Liu, Zhendong

doi:10.1016/j.ymssp.2022.109807

Cited by 18 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…have a small impact on the dynamic response of the overall system, such small component elements are ignored.According to Ref. [39] , a dynamic model for high-speed motorized spindle is constructed based on lumped mass approach.A schematic of the structure and forces of the rotor s ystem of the high-speed motorized spindle is shown in Fig.…”

Section: Equivalent Dynamic Modelmentioning

confidence: 99%

“…where 3 1 = m is the number of stator phases, 1 N is the coil turns number in series under each pole and each phase of the stator, and 1 w k is the winding distribution factor of the stator.The three-phase AC corresponding to the built-in motor can be calculated by [39] : (25) where…”

Section: Unbalanced Magnetic Pull Modelmentioning

confidence: 99%

“…The second category is dynamic eccentricity, i.e., the eccentricity of the motor spindle during the process assuming no assembly error and the stator and rotor are in the initial concentric state [47][48] .The third type is the mixed static and dynamic eccentricity, i.e., the coexistence of static and dynamic eccentricity [49][50] .In practice, the eccentricity of the motor spindle fails with the third type of eccentricity, and this type of eccentricity occurs at the same time as the second type of eccentricity. if there is a mixing eccentricity in the system, the air gap between the stator and rotor can be expressed as [39] :…”

Section: Rotor Eccentricity Modelmentioning

confidence: 99%

“…Manufacturing and assembly errors can also create unbalanced mass excitation in the motor spindle.According to the geometric relationship,the deflection angle  of the eccentric force relative to the radial direction of the stator can be calculated by [ 39] :…”

Section: Unbalanced Mass Excitationmentioning

confidence: 99%

“…Studying the nonlinear characteristics of rotor-bearing systems, such as the rotor-bearing motion system, helps people understand system behavior and predict system performance, gaining a deeper understanding of the vibration behavior, stability, and motion trajectory of rotor systems, and thereby optimizing system structures.Huihui Miao et al [28] study of the dynamic characteristics of the spindle system in a CNC vertical milling machine under the action of unbalanced forces is carried out using the lumped mass method. A system of differential equations with eighteen degrees of freedom was developed for the overall system, and the effects of spindle speed and bearing parameters on the vibration characteristics and stability of the spindle were investigated, and the validity of the model was verified by experiments.Jin Hao et al [39] concluded that thermal-mechanical interaction may cause errors in the dynamic characteristics of high-speed spindles, therefore, a closed-loop iterative modeling method was proposed to improve the accuracy of the model.Zhao et al [29] A considered radial clearance and nonlinear Hertz contact, and introduced the time-varying bearing nonlinear support reaction force into the rotor concentrated mass model, and analyzed the effect of bearings on the nonlinear vibration of the rotor system under combined loads.Fang [ 30 ] established a multi-degree-of-freedom rotor model based on the method of restoring force coupling.The steady-state analysis of bearing stiffness fluctuations was conducted, and the mechanisms and varying patterns of typical resonance responses such as super-harmonics, sub-harmonics, Hopf bifurcation, and chaos in rotor parameter vibrations were discussed.Xie [31] studied the lubrication performance, dynamic characteristics and vibration characteristics of the water-lubricated bearing-rotor coupling system under different lubrication states, and verified the reliability of the theory through experiments.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The vibration analysis of a high-speed motorized spindle system considering nonsmooth bearing restoring force and unbalanced magnetic pulling force

Zhang,

Ma,

Jiang

2023

Preprint

View full text Add to dashboard Cite

As an important equipment in the field of modern machining, high-speed motorized spindle has a broad application prospect and important research significance. This paper focuses on the dynamic behaviour of high-speed motorized spindle systems. By using the lumped mass method to simplify the motorized spindle system, nonlinear factors such as Hertz contact and bearing time-varying stiffness are considered in the model. In addition, the effects of unbalanced magnetic force and unbalanced mass on the whole system are considered.On this basis, a system of 18-degree-of-freedom differential equations is established to describe the motion of the system. The effects of spindle speed, rotor eccentricity, air gap eccentricity and bearing parameters on the vibration behaviour and stability of the spindle are investigated using analytical methods such as bifurcation diagrams, time-domain waveforms, spectra, trajectories and Poincaré sections. The results show that the variation of spindle speed and bearing parameters has a significant effect on the vibration behaviour and stability of the spindle. The study provides a valuable reference for the design and optimisation of motorized spindle systems and bearing selection.

show abstract

Section: Equivalent Dynamic Modelmentioning

confidence: 99%

Section: Unbalanced Magnetic Pull Modelmentioning

confidence: 99%

Section: Rotor Eccentricity Modelmentioning

confidence: 99%

Section: Unbalanced Mass Excitationmentioning

confidence: 99%