Design and Stress Analysis of Extraterrestrial ... - The Black Vault

flutings on the outside diameter of the housing, it falls into the
diametrically opposite working chambers S. Circular channel B
serves for the aeaitional feeding of chambers A. The circular channel
F is provided with a drainage cavity.
With the displacement of the shaft downward the upper clearance
between the shaft and the bearing housing will increase and the
lower will decrease. In this case the filling of the upper chambers
A with liquid is facilitated and, correspondingly, the resistance
at input to the lower chambers A increases. Simultaneously, the
resistance at output from the upper working chambers 5 decreases
and at the output from the lower working chambers B increases.
All this leads to the appearance of a greater pressure differential
in the working chambers 5 and to the creation of lift.
The described diagram of a hydrostatic bearing with reverse
choking is more effective than a bearing with capillary or diaphragm
compensation.
It is necessary to note that with the misalignment of a bearing
its load-lifting capacity will fall because, in this case, the
relationship between the throttling of the liquid at input and output
is disturbed.
The operating principle of a thrust step bearing (Fig. 3.10)
is analogous. In the case of misalignment of the bearing, clearance
in the zone of chamber 1 is decreased and, accordingly, clearance
in the zone of chamber 3 is increased. Hydrodynamic drag at input
and output changes; pressure pl increases and pressure P 3 decreases.
The appearing moment of force will align the position of the rotor.
If the face of the bearing under the effect of axial force moves
strictly along the axis, then, in this case pressure will increase
simultaneously in all. chambers and balancing force will arlbe in
the step bearing.
The operation of oil-film bearings is
connected with the
circulation of a certain quantity of working liquid (the lubricant).
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