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

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'Existing methods of damping art reduced eithe1' to the introduction
of additional resistance, which prevent,5 precessive motion',
into the "Yotor-support" system or to a change in the dynamic
properties of the system during the ,buildup 9f deflection.
Figure 3.81 shows an elastic-dampiný support!w.iith a linear
characteristic, made in the form of a thin ring installed between
the rim of the bearing and the housing of the turbine. 'The necessary
pliability of the ring is
ensured by sdlecting its.thiqkness and
fitting a combination of projections formed by grinding the faces'
on the outside of the ring and'rounding it off on the inside. The
second ring Is solid and unshaped. 'It intensifies 'the damping
ability of the first ring because of. the gap between it and the
outer rim of the bearing. .
Figure 3.82 illustrates the design of an elastic-damping
support with a nonlinear characteristic. After the gap h is eliminated
and a rigid shaft sleeve -is ýncluded, the sqpport changes Ats
characteristics; now its rigidity becordes greater. Sipce the g4
h is small, the working fluid in it dampens the vibrations.
Figure 3.83 is the diagram of a shaft with a rigid support 1 and
a dampened support 2. Upon th6 displacement of the suppor.t a piston
noves in a cylinder filled with A viscous liquid which- flows through
special openings in the pistons and:absorbs the energy of the
vibrations.
12 Ib1c7nYao 0, Is. I#'
I.
Fig. 3.81. Diagram of an elasticdampened
support with a linear to 3""
characteristic.
KEY: (1) Projections.
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