5.3.2.1 Steel spring damper
A steel spring damper (Figure 5-17) is a tuned torsional vibration damper. It consists of two
main parts:
•
The inner part (inner star (005) and spring pack (004)) is attached to the crankshaft
flange at the free end.
•
The outer part (side plates (001), clamping ring (002) and intermediate pieces (003)) is
connected with spring packs (004) to the inner part.
The damper is supplied with pressurized system oil that fills the chambers between the inner
and outer part. The usual setting value for the oil supply pressure is 2.8 bar. But the setting
value can be different, refer to the specification of the damper manufacturer.
If torsional vibrations move the steel springs, oil is pressurized on one side of the oil chambers
and pushed through small clearances to the other side of the chambers. This small oil flow
creates the damping effect of the damper. The combined effect of spring stiffness and damping
decreases the torsional vibrations in the shafting system. The damping work causes heat which
is dissipated by the oil flow. The oil drains into the crankcase.
The optional damper monitoring system monitors the dynamic twist in the damper and the oil
supply pressure.
Fig 5-17 Steel spring damper (generic)
001002003004
005
001
001002
005
006
001
Legend
001 Side plate 004 Spring pack
002 Clamping ring 005 Inner star
003 Intermediate piece 006 Sealing
X92DF
AA00-3130-00AAA-043A-A
Operation Manual Torsional vibration damper
Winterthur Gas & Diesel Ltd.
- 179 - Issue 002 2020-08
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