Double helical gear
lund gear
This is wrong because it has all the gears are driven.
To prevent excessive axial movement of the rotor.
Thrust pads are used to protect the steam turbine rotor from damage due to axial displacement due to axial thrust created by entry of steam in the turbine. generaly the pads clearence is 0.45mm for a bearing size 250mm.
axial shift of a steam turbine is the shifting of turbine rotor in the forward and backward direction due to steam thrust on blades of rotor.
axial thrust acting on the arch causes rib shortening. the arch becomes deeper and hence reduces the horizontal thrust...
Axial Thrust is a force that is generated in an axial direction which is by definition along the shaft
This is wrong because it has all the gears are driven.
herring bone gear (Double helical ) doesn't axial thrust
to mitigate the axial thrust.
To prevent excessive axial movement of the rotor.
Thrust pads are used to protect the steam turbine rotor from damage due to axial displacement due to axial thrust created by entry of steam in the turbine. generaly the pads clearence is 0.45mm for a bearing size 250mm.
The thrust pads will be there at the front or non drive end of the turbine side....These are usually used to limit the axial displacement of the rotor( Means to minimize the movement of rotor axially in order to maintain the axial clearance between the moving blades and the fixed blades of steam turbine rotor).....
A Herringbone Gear consists of a pair of helical gears, arranged so that they form a vee shaped tooth. Thus there is no axial load, and no need for an axial bearing.This is also the origin of the vee shape in the radiator grille of the Citroen car. For Andre Citroen was involved in the manufacture of such gears.
axial shift of a steam turbine is the shifting of turbine rotor in the forward and backward direction due to steam thrust on blades of rotor.
the axial and appendicular system
axial thrust acting on the arch causes rib shortening. the arch becomes deeper and hence reduces the horizontal thrust...
it is used balance axial thrust on turbine rotor due to admitting of high pressure steam in to turbine. it basic purpose is to save thrust bearing.