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Condition monitoring of variable speed worm gearbox lubricated with contaminated gear oil

Ismon, Maznan (2013) Condition monitoring of variable speed worm gearbox lubricated with contaminated gear oil. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Vibration and temperature monitoring are the techniques for machinery maintenance and fault diagnosis that could predict the gears and bearings failure. ,This research focuses on the condition monitoring of worm gearbox lubricated with contaminated gear oil. Worm gearbox consists of a spirally grooved screw moving against a toothed wheel. The main objectives are to characterize vibration behavior of worm gear as hction contaminated lubricant viscosity. Experimental test rig with inverter, electric motor and gearbox was developed and employed for this research. New gear oil with IS0 VG 100,460 and 680 had been indentified to serve the sliding friction of both gears as a comparison to contaminated oil. A predetermine speed of electric motof at 900, 1150 and 1400 WM was introduced to the gearbox and a set of vibration instrumentations with ICP accelerometer model PCB 393B04 was installed as to capture the vibration signal generated. As to enhance the effectiveness of condition monitoring techniques, temperature rising in the gear oil upon the testing period was monitored using PicoLog USB TC-08 Data Logger and later to be analyzed. The experiment had revealed that oil with higher viscosity will contribute to less vibration spectrum. At 900 RPM for IS0 VG100, IS0 VG460 and IS0 VG 680 the vibration reduction percentage within new and contaminated gear oil were 5 1.02%, 24.66% and 5 1.3 0% respectively. The temperature monitoring for IS0 VG100, 460 and 680 for new and contaminated oil were observed within 34.97"C, 35.67"C and 39.27"C respectively. The higher viscosity the higher temperature observed.

Item Type: Thesis (Masters)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Depositing User: Normajihan Abd. Rahman
Date Deposited: 14 Sep 2014 08:56
Last Modified: 14 Sep 2014 08:56
URI: http://eprints.uthm.edu.my/id/eprint/4755
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