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The gravity tanks should have a capacity, which will permit
the turbochargers to run for approximately 15 minutes. This reserve flow is
extremely important to avoid damage to the bearings. Another benefit is that
the gravity system can be isolated and the pressure system used for flushing.
Lubricating oil sumps are situated immediately underneath the roller
bearing and are separate for the roller bearing and are separate for the
turbine and compressor ends. Oil pumps are mounted at each end and driven by the
shaft, spray oil on to their respective bearings (see sketch above). This
enclosed system is self-contained and independent.
The lubricating system for a turbocharger with plain
bearings can be taken from the main engine system or it can be independent.
When the main engine system is used, adequate filtration and safe- guards
against interruption of supply must be provided.
For an independent lubricating system a drain tank is
required, together with duplicate sets of lubricating oil pumps, a cooler, header
tank, alarms, filter, shut-off valves, etc.
The pressure gravity system is generally used in merchant
vessels where height is not restricted. It utilises an overhead tank about 5
meters above the turbochargers. The head from the gravity tank is sufficient to
produce a continuous supply of oil to the turbocharger bearings and the
capacity should be such that the bearings will not be damaged, should both
lubricating oil pumps break down.
The alarm in the gravity tank will alert the engineers on
watch to slow down or stop the main engine whilst an investigation takes place.
The lubricating oil pump draws oil from the drain tank via the suction
strainers and delivers the warm oil through fine-mesh filters to the oil
coolers and then to the turbochargers and gravity tank. See the figure below.
The gravity tanks should have a capacity, which will permit
the turbochargers to run for approximately 15 minutes. This reserve flow is
extremely important to avoid damage to the bearings. Another benefit is that
the gravity system can be isolated and the pressure system used for flushing.
Contamination of the lubricating oil reduces the effective
life of the bearings considerably and, when changing oil or replacing bearings,
extreme cleanliness must be observed.
3 comments:
Turbochargers of ABB and other makes are available in stock. The Turbochargers are reconditioned and are guaranteed for performance. Turbochargers suitable for Wartsila, Mirrlees Blackstone, Caterpillar and all makes of diesel engines are available in stock. We also maintain stock of Turbochargers spares.
Turbo Chargers
Lubricating oils are a necessary element in any metalworking operation. As much as these oils are the lifeline to equipment operation, they can also impact metalworking coolant operation. In order to better understand how these systems interact with water based metalworking coolants, one must first understand the basic technologies that are used to operate such machining centers and press systems in today's' manufacturing environment. Awesome post!
it was so good to read and very useful to update my skill as updated one.
Lubricating Oil Pump
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