Turbine Shaft & Wheel – Oil Supply Pressure Problem
Here, you can see an example of heavy wear and polishing damage caused to a turbine shaft and wheel by a lack of oil, either due to a poor supply, or low oil pressure.
At AET, our experienced, talented teams specialise in the repair of all types of turbo. Over the years, we’ve seen thousands of damaged and broken turbochargers, and in this new section of the blog, we’ll be showcasing a series of common problems, their causes, and what needs to be done to fix them. We’ll be updating the blog with a series of new ‘fails’ each month, so check back regularly.
Here, you can see an example of heavy wear and polishing damage caused to a turbine shaft and wheel by a lack of oil, either due to a poor supply, or low oil pressure.
In this example, you can see a turbine shaft and wheel that’s been damaged due to severe oil contamination – notice the built up oil coating both the wheel and the shaft, and the damaged blades on the wheel. On the shaft itself, you can also see where foreign objects in the contaminated oil have caused scoring damage.
This image shows a turbine shaft and wheel with fairly serious impact damage. If you look at the wheel itself, you can see that the blades are uneven and chipped, and that the surface of the wheel has become severely pitted.
Here, you can see a different example of wearing damage to a piston ring seal groove – in this case, the face on the inside of the groove has been worn away, so that it now has a lipped edge.
This example shows a worn piston ring seal groove – in the image, you can see that the outer edge of the piston ring seal groove is sloping outwards, when it should be straight.
In this image, you can see some moderate corrosion to the piston ring seal area of the turbine shaft – the surface of the metal has become worn, pitted and roughened.
This image shows a damaged turbine wheel base – look closely and you can see that the base has several sections cut out of it, which have been chipped off.
In this example, you can see that the bearing housing galleries have become completely blocked and choked up with carbonised oil.
Here you can see a bearing housing register with fairly extensive corrosion damage.
In this image, you can see damage to the bearing housing seal area, caused by excessive play and wear to the journal and thrust bearings.