Fan Control - TLT Turbo GmbH

Sleeve Bearing with Hydrostatic Jacking
Designed with Two Lubrication Pockets
for applications with high start-up load, frequent operation at low speed and very
long rundown periods to avoid wearing on the bearing shell
The high pressure pumps for hydrostatic lifting units are constant volume systems, i.e. they
supply a defined oil throughput. The maximum load carrying capacity of the system is
usually limited to 200 bar.
The maximum pump pressure occurs during the starting process, due to the oil wedge
being narrow when the bearing is still at rest. The beginning of the shaft lifting thus involves
a remarkable pressure surge. As soon as the oil wedge gets wider as the shaft is further
lifted, the pressure decreases depending on the bearing geometry and the oil throughput,
since the effectively load carrying surface is increased.
The constant pump pressure for holding up the shaft should be adjusted to 100 bar.
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a Siemens Company