Application of Direct Metal Deposition Process for Failure Prevention of Oil Pump Gear Shaft in an Aero Engine

Tumuluri, Srinivasakiran; Murugeshan, P.; Mishra, Ranjan; Subrahmanyam, V.

doi:10.1007/s11668-017-0289-0

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…A turbo shaft is the main driving part of an aeroengine. Since the engine often runs at a temperature greater than 500 degrees, under catalysis of metal, carbon deposition (CD) can be produced on the inner surface of a turbo shaft after a series of oxidation reactions, pyrolysis, cracking, dehydrogenation, coking, and polymerization from the fuel in the engine (Tumuluri et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Study and Analysis of Removing the Carbon Deposition on the Inner Surface of a Turbo-Shaft by Chemically Assisted Magnetic Grinding

Kang

Zhu

et al. 2020

Front. Mater.

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Removing carbon deposition (CD) has always been a challenging problem. On the inner surface of a turbo shaft, CD is observed by scanning electron microscopy (SEM) to analyze its microstructure and composition, and its formation mechanism is analyzed by X-ray diffraction (XRD), infrared spectroscopy, and Raman spectroscopy. Considering the physical and chemical properties of deposited carbon, chemically assisted magnetic grinding (CAMG) is proposed and tested by a translational permanent magnet grinding device. By analyzing the removing mechanism of CAMG, response surface analysis is adopted to analyze the influence law of surface roughness based on the interactions between pairs of the three following parameters: the rotational speed of the rotating magnetic field, needle type, and grinding time. The optimal process parameters can be obtained with a rotational speed of the rotating magnetic field of 600 r/min, a needle type of 1.0 × 5 mm, and a grinding time of 60 min. The surface quality of the workpiece processed by CAMG can be comprehensively appraised by observing the microstructure, calculating the carbon deposit removal ratio and testing the surface stress. Compared to single magnetic grinding, CAMG is more environmentally friendly and has a higher removal ratio and better surface quality with an obvious decrease in residual stress. By professional tests, the remaining deposited carbon is less than the specified value required by the technology, which satisfies the requirements of enterprises.

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Section: Introductionmentioning

confidence: 99%

Study and Analysis of Removing the Carbon Deposition on the Inner Surface of a Turbo-Shaft by Chemically Assisted Magnetic Grinding

Kang

Zhu

et al. 2020

Front. Mater.

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“…Gear pumps are widely used in lubrication and cooling systems of aircraft. 1–3 The requirements for aircraft weight reduction have spurred developments aimed at high-speed miniaturization of gear pumps. 4–6 Wear is aggravated during high-speed operation of the pump, and the journal bearing is the most worn part of the pump.…”

Section: Introductionmentioning

confidence: 99%

Temperature rise of journal bearing of the high-speed circular arc gear pump

Zhou

Yuan

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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A “circular arc–involute–circular arc” circular arc gear pump was developed based on a gear meshing principle and coordinate transformation as well as an accurate calculation model of the radial force. The dependence of the radial force on the meshing angle was investigated. The temperature rise of journal bearings in the pump was evaluated for bearings with and without herringbone grooves. Furthermore, the influence of the rotational speed and outlet pressure on this rise was assessed. The results revealed using herringbone groove on the inner wall of bearing was effective in reducing the temperature increase. Therefore, the use of grooves represents a suitable method of reducing the temperature rise in the journal bearings of a high-speed gear pump.

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Microstructure and Interfacial Characteristics of Inconel 625-Ti6Al4V Bimetallic Structures Produced by Directed Energy Deposition

Vinod

Warghane

Murugan

et al. 2023

J. of Materi Eng and Perform

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Application of Direct Metal Deposition Process for Failure Prevention of Oil Pump Gear Shaft in an Aero Engine

Cited by 4 publications

References 6 publications

Study and Analysis of Removing the Carbon Deposition on the Inner Surface of a Turbo-Shaft by Chemically Assisted Magnetic Grinding

Study and Analysis of Removing the Carbon Deposition on the Inner Surface of a Turbo-Shaft by Chemically Assisted Magnetic Grinding

Temperature rise of journal bearing of the high-speed circular arc gear pump

Microstructure and Interfacial Characteristics of Inconel 625-Ti6Al4V Bimetallic Structures Produced by Directed Energy Deposition

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