Analysis of Middle Bearing Failure in Rotor Jet Engine Using Tip-Timing and Tip-Clearance Technique

Rokicki, Edward; Majewski, Paweł; Rządkowski, Romuald; Szczepanik, Ryszard; Spychała, Jarosław; Drewczyński, M.

doi:10.1115/gt2014-25722

Cited by 4 publications

(4 citation statements)

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“…In fact, once an OSF happens, i s k should change. As a consequence, u ra , u rb , and u rc are also altered due to Equation (10). Switching signals are confined by u ra , u rb , and u rc , which is shown in Figure 2.…”

Section: The Control Strategymentioning

confidence: 99%

“…where ω is the actual rotor speed. In Equation (10), i s k takes part in flux regulation. We assume that the wind speed is fixed.…”

Section: The Control Strategymentioning

confidence: 99%

“…In practice, although PMSG as one of the mature technologies in WS has been widely adopted, its accidents due to some factors such as friction [1,2], high temperature [3], and an operation process, have inevitably occurred [4,5]. Various faults may have occurred in rotor bar [6,7], engine [8], bearing [9,10], wind turbine gearboxes [11], and more. Faulty events may have damaged electrical energy, threatened the safety of the power system, and even harmed human lives and environments [4].…”

Section: Introductionmentioning

confidence: 99%

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A Simple-to-Implement Fault Diagnosis Method for Open Switch Fault in Wind System PMSG Drives without Threshold Setting

2018

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The conversion system is a major contributor to failure rates. These faults lead to time and cost consuming. Fault diagnosis capabilities pay as a solver to achieve a steady system. This paper presents a full analysis of permanent magnet synchronous generator wind system (PMSGWS) and proposes a special RMS voltage-based fault diagnosis method. The full analysis presents a comprehensive knowledge of faulty behaviors especially under arm current flowing or cutting off. Due to enough knowledge of faulty behaviors, the implementation of the detection method without threshold setting is contributed by the special RMS voltage. Its sample period is set longer than the time of the maximum pulse width ratio (MPR) and shorter than the fault show time of lower tube voltage. Due to this, the detection speed and robustness are achieved. By these simple settings for the fault diagnosis method, the faulty switch is detected in less than 1/4 of the period. Simulation and experimental results confirm the validity and feasibility of the new proposed fault detection method.

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Section: The Control Strategymentioning

confidence: 99%

“…where ω is the actual rotor speed. In Equation (10), i s k takes part in flux regulation. We assume that the wind speed is fixed.…”

Section: The Control Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Simple-to-Implement Fault Diagnosis Method for Open Switch Fault in Wind System PMSG Drives without Threshold Setting

2018

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“…Rokicki et al analysed bearing failures of a jet engine with tip timing. Experiments with damaged and working bearings were compared [21]. Tamura et al focused on non-contact vibration measurement in gas turbines and different sensor technologies were used [22].…”

Section: Hot Gas Component Monitoringmentioning

confidence: 99%

A Review of NDT/Structural Health Monitoring Techniques for Hot Gas Components in Gas Turbines

Mevissen

Meo

2019

Sensors

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The need for non-destructive testing/structural health monitoring (SHM) is becoming increasingly important for gas turbine manufacturers. Incipient cracks have to be detected before catastrophic events occur. With respect to condition-based maintenance, the complex and expensive parts should be used as long as their performance or integrity is not compromised. In this study, the main failure modes of turbines are reported. In particular, we focus on the turbine blades, turbine vanes and the transition ducts of the combustion chambers. The existing monitoring techniques for these components, with their own particular advantages and disadvantages, are summarised in this review. In addition to the vibrational approach, tip timing technology is the most used technique for blade monitoring. Several sensor types are appropriate for the extreme conditions in a gas turbine, but besides tip timing, other technologies are also very promising for future NDT/SHM applications. For static parts, like turbine vanes and the transition ducts of the combustion chambers, different monitoring possibilities are identified and discussed.

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Review of Non-contact Blade Vibration Monitoring Based on Blade Tip Timing

Wang,

Fu,

Zheng

et al. 2024

Proceedings of the UNIfied Conference of DAMAS, IncoME and TEPEN Conferences (UNIfied 2023)

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Analysis of Middle Bearing Failure in Rotor Jet Engine Using Tip-Timing and Tip-Clearance Technique

Cited by 4 publications

References 0 publications

A Simple-to-Implement Fault Diagnosis Method for Open Switch Fault in Wind System PMSG Drives without Threshold Setting

A Simple-to-Implement Fault Diagnosis Method for Open Switch Fault in Wind System PMSG Drives without Threshold Setting

A Review of NDT/Structural Health Monitoring Techniques for Hot Gas Components in Gas Turbines

Review of Non-contact Blade Vibration Monitoring Based on Blade Tip Timing

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