WÄRTSILÄ 46DF, Product Manual

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15.2.2 Resilient mounting
In order to reduce vibrations and structure borne noise, engines can be resiliently mounted
on steel spring elements. The transmission of forces emitted by the engine is 10-20% when
using resilient mounting. Typical structure borne noise levels can be found in chapter 17.
The resilient elements consist of an upper steel plate fastened directly to the engine, vertical
steel springs, and a lower steel plate fastened to the foundation. Resin chocks are cast under
the lower steel plate after final alignment adjustments and drilling of the holes for the fastening
screws. The steel spring elements are compressed to the calculated height under load and
locked in position on delivery. Compression screws and distance pieces between the two
steel plates are used for this purpose.
Rubber elements are used in the transverse and longitudinal buffers. Steel chocks must be
used under the horizontal buffers.
The speed range is limited to 450-600 rpm for resiliently mounted 8L46DF engines. For other
cylinder configurations a speed range of 400-600 rpm is generally available.
Fig 15-5 Seating and fastening, resiliently mounted in-line engine (DAAE029031 A)
15-6 DBAD209883
Wärtsilä 46DF Product Guide 15. Foundation