Research on asymmetrical supporting rotor system with radial clearance

Li, Mo; Liu, Yongbao; Wang, Qiang

doi:10.1088/1757-899x/382/4/042055

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…The main components of ITs are metal oxides such as silica, alumina and iron oxide, 8 and these metal oxides have been successfully used as flame retardant fillers in polymers. [9][10][11][12][13] Jiao 14 investigated the synergistic effect of Al 2 O 3 and layered double hydroxide (LDH) in ethylene-vinyl acetate copolymer/LDH (EVA/LDH) composites by the limiting oxygen index (LOI), the UL-94 vertical combustion test and the cone calorimetry test (CCT).…”

Section: Introductionmentioning

confidence: 99%

Iron tailings/ammonium polyphosphate system in rigid polyurethane foam composites to enhance fire safety: a novel strategy for utilization of metallurgical solid waste

Wang

Yang

et al. 2022

Polymer International

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Iron tailings (ITs) is a solid waste after mineral processing, but the high value utilization of ITs has always been a problem perplexing the industry. In order to broaden its application field, it was compounded with ammonium polyphosphate (APP) to make rigid polyurethane foam flame retardant. SEM, limiting oxygen index, UL-94 vertical combustion, TGA, the cone calorimetry test (CCT), thermogravimetric analysis-Fourier transform infrared spectroscopy (TG-FTIR) and Raman tests were used to characterize the bubble morphology, flame retardant properties, thermal stability, combustion performance, gas phase products and graphitization degree of the char layer. The TGA indicated that ITs/APP could effectively improve the thermal stability of the composites, and the T 5wt% of the composites and the char residue rates at 700 °C were significantly improved. The CCT confirmed that ITs/APP could effectively reduce the thermal damage and non-thermal damage of the composites, and the peak heat release rate, total heat release and smoke factor were reduced by 29.08%, 19.21% and 36.69%, respectively. The TG-FTIR test implied that ITs/APP inhibited the release intensity of various gaseous products. The CCT, SEM and Raman tests showed that ITs/APP improved the compactness and graphitization degree of the char residue of the composites, thus improving their flame retardancy. This study provides a theoretical basis and experimental basis for the high value utilization of ITs.

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Section: Introductionmentioning

confidence: 99%

Iron tailings/ammonium polyphosphate system in rigid polyurethane foam composites to enhance fire safety: a novel strategy for utilization of metallurgical solid waste

Wang

Yang

et al. 2022

Polymer International

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“…Accordingly, it is necessary to study the dynamics of rotor systems supported by different oil films at both ends. Literature [13][14][15] studied the effect of asymmetric lubricating oil condition on the dynamic behavior of the rotor-bearing system, whereas this model only considered the effect of the viscosity of the lubricating oil on the oil film force, instead of the effect of linear stiffness and nonlinear friction. In fact, there are many nonlinear factors in the rubbing rotor (e.g., nonlinear oil film force, nonlinear stiffness, and nonlinear friction).…”

Section: Introductionmentioning

confidence: 99%

Dynamical Behavior Analysis of Rubbing Rotor System under Asymmetric Oil Film Force

Tang

Feng

Zou

2019

Mathematical Problems in Engineering

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Rubbing is one of the most common and significant faults that exist in the rotor system. It exhibits extremely complicated dynamic behavior. Existing dynamic models are primarily based on the symmetrical rotor structure, in which the oil film forces at both ends of support are considered identical. However, in practice, the oil film force may be differently affected by multiple factors (e.g., viscosity of lubricants, the thickness of oil film, and clearance of journal bearing). In this study, a novel dynamic model of the rubbing rotor system under asymmetric oil film force was developed. Furthermore, based on the nonlinear rotor dynamic theory, its dynamic behavior with different parameters was analyzed, and the corresponding chaotic features were extracted. The results indicated that the evolution law of chaotic motion was more complicated, and the chaotic region of system response was obviously wider under the asymmetric oil film force than the symmetrical oil film force.

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Research on asymmetrical supporting rotor system with radial clearance

Cited by 2 publications

References 5 publications

Iron tailings/ammonium polyphosphate system in rigid polyurethane foam composites to enhance fire safety: a novel strategy for utilization of metallurgical solid waste

Iron tailings/ammonium polyphosphate system in rigid polyurethane foam composites to enhance fire safety: a novel strategy for utilization of metallurgical solid waste

Dynamical Behavior Analysis of Rubbing Rotor System under Asymmetric Oil Film Force

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