Search results for "gearbox"

showing 6 items of 6 documents

A review of diagnostics and prognostics of low-speed machinery towards wind turbine farm-level health management

2016

Abstract Large wind farms are gaining prominence due to increasing dependence on renewable energy. In order to operate these wind farms reliably and efficiently, advanced maintenance strategies such as condition based maintenance are necessary. However, wind turbines pose unique challenges in terms of irregular load patterns, intermittent operation and harsh weather conditions, which have deterring effects on life of rotating machinery. This paper reviews the state-of-the-art in the area of diagnostics and prognostics pertaining to two critical failure prone components of wind turbines, namely, low-speed bearings and planetary gearboxes. The survey evaluates those methods that are applicabl…

0209 industrial biotechnologyEngineeringGearbox020209 energy02 engineering and technologyTurbineBearings; Diagnostics; Gearbox; Health management; Prognostics; Reliability centered maintenance; Wind turbines; Renewable Energy Sustainability and the Environment020901 industrial engineering & automationWind turbines0202 electrical engineering electronic engineering information engineeringForensic engineeringRenewable EnergyDiagnosticsPrognosticsReliability (statistics)Wind powerHealth management systemSustainability and the EnvironmentRenewable Energy Sustainability and the Environmentbusiness.industryCondition-based maintenanceReliability centered maintenanceRenewable energyReliability engineeringLow speedHealth managementPrognosticsbusinessBearings
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Modeling of Wind Turbine Gearbox Mounting

2011

In this paper three bushing models are evaluated to find a best practice in modeling the mounting of wind turbine gearboxes. Parameter identification on measurements has been used to determine the bushing parameters for dynamic simulation of a gearbox including main shaft. The stiffness of the main components of the gearbox has been calculated. The torsional stiffness of the main shaft, gearbox and the mounting of the gearbox are of same order of magnitude, and eigenfrequency analysis clearly reveals that the stiffness of the gearbox mounting is of importance when modeling full wind turbine drivetrains.

EngineeringParameter identificationbusiness.industryDrivetraingearbox mountingStructural engineeringTurbinelcsh:QA75.5-76.95Computer Science ApplicationsDynamic simulationwind turbineControl and Systems EngineeringModeling and SimulationBushinglcsh:Electronic computers. Computer sciencebusinessSoftwareModeling, Identification and Control
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Split-Way CVTs: Parametric Analysis and Design

The thesis provides a parametric analytical method for the analysis and design of power-split continuously variable transmissions, which represent the state of the art for heavy-duty vehicles and hybrid electric cars. The functioning of any driveline is described by mean of a simple set of kinematic parameters, regardless of the constructive scheme. The calculation of the control torques remains straightforward even when both inertial effects and mechanical losses are taken into account. A simple design procedure is described and generalized in order to address any order of driveline, including multimode transmissions. The final layout is generated additively, without the need to analyze hu…

Power-Split continuously variable transmissions CVT PS-CVT driveline gearbox planetary epicyclic gear gearing mechanical losses parametric design functional design hybrid electric vehicles HEV heavy-duty vehiclesSettore ING-IND/13 - Meccanica Applicata Alle Macchine
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A Review on Approaches for Condition Based Maintenance in Applications with Induction Machines located Offshore

2012

Published version of an article in the journal: Modeling, Identification and Control. Also available from the publisher at: http://dx.doi.org/10.4173/mic.2012.2.4 Open access This paper presents a review of different approaches for Condition Based Maintenance (CBM) of induction machines and drive trains in offshore applications. The paper contains an overview of common failure modes, monitoring techniques, approaches for diagnostics, and an overview of typical maintenance actions. Although many papers have been written in this area before, this paper puts an emphasis on recent developments and limits the scope to induction machines and drive trains applied in applications located offshore.

Signal processingEngineeringGearboxDrivetrainlcsh:QA75.5-76.95wind turbineInduction machineDiagnosticsPrognosticsbusiness.industryCondition-based maintenanceVDP::Technology: 500Electrical engineeringCondition monitoringComputer Science ApplicationsCondition monitoringIdentification (information)Induction machineControl and Systems EngineeringModeling and SimulationBearingPrognosticslcsh:Electronic computers. Computer scienceSoftware engineeringbusinessSoftwareModeling, Identification and Control
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Bearing fault detection based on time-frequency representations of vibration signals

2015

To prevent failures of a rolling bearing in the gearbox drive system, acceleration sensors are used to detect fault-related signals of the bearing. It is a big challenge to observe and identify signals caused by bearing defects in the time domain or the frequency spectrum by a conventional Fourier analysis. The time-frequency representation of the fault-related signals implemented by the windowed Fourier transform is studied in this work. It is shown that the fault characteristic frequencies can be clearly identified in the time-frequency spectrum if a fault occurs in the bearing of the gearbox at different speeds. Otherwise, the shaft frequency and its multiples are the main harmonics in t…

gearbox drive trainEngineeringaccelerometersBearing (mechanical)business.industryMechanical EngineeringAcousticswindowed Fourier transformEnergy Engineering and Power Technologyaccelerometers; bearing faults; gearbox drive train; windowed Fourier transform; Energy Engineering and Power Technology; Electrical and Electronic Engineering; Mechanical EngineeringFault (power engineering)Fault detection and isolationlaw.inventionTime–frequency analysisVibrationsymbols.namesakeFourier transformFourier analysislawsymbolsElectronic engineeringbearing faultsTime domainElectrical and Electronic Engineeringbusiness2015 18th International Conference on Electrical Machines and Systems (ICEMS)
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Feasibility of controlling the thermal regime of the transmission of agricultural machines in conditions of Ukraine

2019

During the heating of the tractor gearbox oil, there is a decrease in the efficiency, which leads to an increase in fuel consumption. This is observed at any time of the year. The efficiency of a gearbox as a function of the ambient temperature and the operating time has been obtained. This allows you to predict the effectiveness of the work of the tractor. Various methods to improve transmission performance were analyzed. The article analyzes the parameters of the exhaust gas of a tractor diesel engine. It was proved that one of the effective methods for temperature control is to use of an exhaust gas heat recovery system. It was shown that the capacity of the exhaust gas recovery system i…

recoveryeconomygearboxoiltractorUkrainian Black Sea region agrarian science
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