Steam turbine tilting pad thrustbearing

Short Description:

     Tilting pad thrust bearing is also called Mitchell type radial bearing. The bearingpad is composed of several bearing pad arc segments that can rotate around itsfulcrum. The gap between each bearing pad arc segment serves as the oil inlet ofthe bearing pad. When the journal rotates, Each tile forms an oil wedge. This kindof bearing has good self-centering performance and will not cause instability. Thepad can be tilted freely on the support point, and the position can be adjustedfreely to adapt to the changes of dynamic conditions such as rotational speed andbearing load. The oil film force of each pad passes through the center of thejournal, and it does not cause the shaft to slide. Therefore, it has high brakingper formance, can effectively avoid oil film self-excited oscillation and gaposcillation, and has a good limiting effect on unbalanced oscillation. The bearing capacity of a tilting pad radial bearing is the vector sum of the bearing capacities ofeach pad. Therefore,it has a lower bearing capacity than a single oil wedge hydrodynamic radial bearing, but has high rotation accuracy and good stability, andis widely used in high-speed and light-load machinery, such as steam turbines andgrinders.

Steam Turbine Tilting Pad Thrust Bearing

        Tiling pad thrust bearings are usualy composed of 3 to 5 or more arc-shaped pads that can tlt freely on the fulcrum, so they are also caled living multi-pad supporbearings, also known as swing bearing pad bearings. Because ts pads can swing freely with diferent speeds, loads and bearing temperatures, multiple oil wedgesare formed around the ournals. And each oil film pressure always points to the center, with high stability.

in additon, the tling pad support bearing also has the characteristics of large support ftexibilty, ood vibration energy absorption, lare bearing capacity,low powerconsumoton and adaptation to fonward and reverse rotaton.However the structure of the ilina tle is comdlex, the instalation and maintenance are dificut. and thecost is relatively high.

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