Vibration response analysis for lathe spindle-housing-belt system with rubbing is performed by finite element method. The emergence of free-running abnormal noise of economical commercial lathes inspires the fusion of the annular rubbing model and spindle-housing-belt system since there is a small clearance between the front …
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WhatsApp: +86 18221755073This case occurred on a steam turbine generator with power output of approximately 9 MW. The double-flow steam turbine with rated speed of about 4350 rpm drove the 1800 rpm 4-pole generator via a speed reduction gearbox.Its machine train diagram is shown in Fig. 1.
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WhatsApp: +86 182217550731. Introduction. Rubbing is one of the common faults of aero-engine systems [1].Rubbing between blades and casing will cause complex vibration of the whole machine, reduce system performance, shorten the life of blades, and even lead to blades shedding and other major faults [2], [3].In addition, blade–casing rubbing can produce …
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WhatsApp: +86 18221755073You can repeat this same clockwise motion with a kneading technique. Each time you apply pressure, make a small circular motion before you move your hands to the next massage point.
WhatsApp: +86 18221755073Friction is a force due to the tangential resistance to motion that resists the relative rolling or sliding of solid surfaces and material elements against each other [].Friction is caused by the dissipation of energy in the rubbing or sliding interface, which results in the generation of heat. The generated heat has a negative impact on the …
WhatsApp: +86 18221755073Severe looseness and unbalance of a twin-spool rotor system aggravate the vibration of the entire system, which may induce secondary faults such as intershaft rubbing. To address this issue, the dynamic responses of a twin-spool rotor–casing system with looseness and intershaft rubbing coupling faults are analyzed. First, …
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WhatsApp: +86 18221755073DOI: 10.1080/15397734.2023.2277733 Corpus ID: 265235023; Vibration characteristic investigation of an eccentric rotor system with rubbing @article{Guan2023VibrationCI, title={Vibration characteristic investigation of an eccentric rotor system with rubbing}, author={Hong Guan and Hui-Yong Ma and Yang Yang and …
WhatsApp: +86 18221755073Yu et al. [16] examined the nonlinear modal of dual-rotor rubbing systems and their influence on system responses. Concerning the issue of contact forces in rubbing interactions, Yang et al. [17], [18] investigated contact force calculation models for aero-engine rotors and casings with soft and hard coatings and analyzed their dynamic …
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WhatsApp: +86 18221755073A dual rotor experimental rig of an aero-engine is designed and manufactured. • Nonlinear dynamic model of the test rig is established based on finite element method.. Reduced-order model of dual rotor-bearing system is obtained by CMS method.. Local blade-casing rubbing fault feature is revealed by numerical simulation …
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