Lubrication
The turboshaft, which turns at very high speeds, is carefully balanced and positioned on so called floating glide bearing bushings. This means that the bearings have a heavy flow of oil, which results in the shaft floating on an oil film when it turns. The lubrication oil is received from the engine lubrication system through an oil pipe that leads from a connection beside the pressure sensor, engine oil in the cylinder block to the turbo compressor side. The return oil flows from the turbo compressor underside to the engine oil sump via a channel in the cylinder block. The seal between the shaft and the bearing housing consists of rings (type piston rings) which are positioned in grooves on the shaft.
