Self-synchronization theory of dual motor driven vibration system with two-stage vibration isolation frame

Li, He; Liú, Dan; Jiang, Lai; Zhao, Chunyu; Wen, Bangchun

doi:10.1007/s10483-015-1905-7

Cited by 12 publications

(8 citation statements)

References 11 publications

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“…e coupling items (α 1 , α 2 , Δα 1 , and Δα 2 ) in equations (1) and (2) are symmetrically distributed in the dynamic formula, and according to the equations (13) and (14), the microangular velocity solution indicate that the minor variation of rotational motion in the two rotating systems is mutually limited. e absolute value of synchronous index D, which is smaller than 1, can indicate the synchronous level for the strength of the vibration of machine.…”

Section: Discussionmentioning

confidence: 99%

“…How to achieve synchronous motion of hydraulic motors has been restricting the application of self-synchronization of hydraulic motor in vibration engineering. But, there are more factors affecting the self-synchronization of hydraulic motors than electric motors [11][12][13], which is determined by the characteristics of the hydraulic system itself, such as flow leakage, large damping, and so on. Our research mainly includes two parts: coupling and compensation.…”

Section: Description Of the Two Rotating Systems In Dynamic Equilibrimentioning

confidence: 99%

“…e necessary criterion for synchronization is that there must exist a solution c to equation (13), and it makes Δ _ α ′ � 0.…”

Section: Synchronous Criterionmentioning

confidence: 99%

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Coupling Synchronization Criterion of Two Hydraulic Motors in an Eccentric Rotary Vibration Machine

Chun-lei

et al. 2019

Shock and Vibration

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In an eccentric rotating system driven by two hydraulic motors without synchronous gears, vibration coupling may help render motion stable. In order to investigate how vibration coupling influences the motion, the coupling characteristics of the vibration system were studied regarding the differences between two motors such as leakage network, coulomb damping network, and pressure loss network, and the sensitivity of the influence factors was also studied. The influence of tiny differences between the two motors, tiny differences in the motion pair structure, in the oil temperature and in the resistance coefficient on the coupling motion were discovered, and the criterion for synchronous motion were obtained consequently. The results show that the influence of the resistance coefficient difference on system motion stability is the greatest, accounting for 46.7%, and the influence of the difference in motion pair structure (e.g. motor piston clearance) is the second, accounting for 32.8%. For motors with displacement 80 ml/r, the condition of self-synchronization is that the difference in piston clearance between the two motors is equal to or smaller than 6 μm. Experiments have proved the correctness of the theory and showed that the synchronization can be achieved by leakage compensation, damping compensation, and back-pressure compensation of the external system by means of control when the motors rotate slowly enough for system response. The study shows that the coupling synchronous model can reduce the force of the gear for the eccentricity rotary system with synchronous gear, and that the synchronous stability can be improved for the eccentricity rotary system without synchronous gear.

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Section: Discussionmentioning

confidence: 99%

Section: Description Of the Two Rotating Systems In Dynamic Equilibrimentioning

confidence: 99%

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Coupling Synchronization Criterion of Two Hydraulic Motors in an Eccentric Rotary Vibration Machine

Chun-lei

et al. 2019

Shock and Vibration

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“…18 Whether the dual-motor-driven elliptical vibrating screen can reach synchronization or not depends upon the adjustment capability of the capture torque. In other words, the system should meet a synchronization condition for capture torque, 19 as shown below. where Tc is the capture torque; ΔMg is the difference of the driving torque of the two motors; ΔMf is the difference of the friction torque of the two motors.…”

Section: Stable Synchronization Model Of Dual-motor-driven Vibrating mentioning

confidence: 99%

A new study on dynamic adjustment of vibration direction angle for dual-motor-driven vibrating screen

Chen

Yan

Yin

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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For a dual-motor-driven elliptical vibrating screen, the driving frequencies of the two motors are studied in this paper and it exposes the significant influences of different driving frequencies on the vibration direction angle of the self-synchronous system. A dynamic model is established to demonstrate the new concepts and innovative ideas put forth in this paper. Simulink and prototype experiments are implemented to further study the influences of different driving frequencies on the phase angle and the vibration direction angle. The results of simulation and experiments shows that vibrating screen driven by the two motors can not only achieve a stable synchronization within a certain frequency range by changing the driving frequency of either of the two motors, but also the vibration direction angle significantly changes at similar but different driving frequencies. This is an important finding that has important significance for the future operations of dual-motor-driven vibrating screen in industry. The method developed in this study would be a valuable engineering tool which can be used in design and application of the screens and the screening operations.

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“…A simple way to model this type of isolator is to combine lateral linear springs with a linear (vertical) spring orthogonal to the lateral springs [2-5], resulting in an isolator that has high-static-low-dynamic-stiffness (HSLDS), and many studies have shown there are many ways to achieve this characteristic [1, [6][7][8][9][10][11]. Recently, this concept has been further developed as a two-stage isolator [12][13][14]. In all these cases, the damping was due to a linear viscous damper in parallel with the vertical springs.…”

Section: Introductionmentioning

confidence: 99%

High-static-low-dynamic-stiffness vibration isolation enhanced by damping nonlinearity

Brennan

Ding

2018

Sci. China Technol. Sci.

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High-static-low-dynamic-stiffness (HSLDS) nonlinear isolators have proven to have an advantage over linear isolators, because HSLDS nonlinear isolators allow low-frequency vibration isolation without compromising the static stiffness. Previously, these isolators have generally been assumed to have linear viscous damping, degrading the performance of the isolator at high frequencies. An alternative is to use nonlinear damping, where the nonlinear behavior is achieved by configuring linear dampers so they are orthogonally aligned to the excitation direction. This report compares the performances of single-stage and two-stage isolators with this type of damping with the corresponding isolators containing only linear viscous damping. The results show that both isolators with linear viscous damping and nonlinear damping reduce the transmissibility around the resonance frequencies, but the results show that the isolators with nonlinear damping perform better at high frequencies.

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Self-synchronization theory of dual motor driven vibration system with two-stage vibration isolation frame

Cited by 12 publications

References 11 publications

Coupling Synchronization Criterion of Two Hydraulic Motors in an Eccentric Rotary Vibration Machine

Coupling Synchronization Criterion of Two Hydraulic Motors in an Eccentric Rotary Vibration Machine

A new study on dynamic adjustment of vibration direction angle for dual-motor-driven vibrating screen

High-static-low-dynamic-stiffness vibration isolation enhanced by damping nonlinearity

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