DIESEL-MECHANICAL TRANSMISSION FOR SOVIET SUB-ARCTIC ICEBREAKERS (MUDYUG, MAGADAN AND DIKSON)
Dikson, the last of a trio of icebreakers built for the Soviet Union by Wartsila, ran trials in early 1983. The article describes these sister ships <the others are Mudyug and Magadan>, which are intended to work in the approaches to non-Arctic ports such as those in the Barents Sea, Sea of Okhotsk and Baltic. They are also powerful tugs and have extensive salvage and firefighting equipment. Each ship has four Vasa 8R32 main engines, each of 2390 kW at 750 rpm, coupled in pairs to drive twin c.p. propellers at 145 rpm through Lohmann & Stolterfoht mechanical transmission. Each transmission system has a Pneumaflex clutch/coupling, a Navilus twin-input combining/reduction gearbox, and a 12-tonne flywheel. Maximum shaft output is 9100 kW <12400 shp> giving 1400 kN bollard pull; at 7000 kW shaft output, free-running speed is 16.5 knots. The propellers are protected, by a special load-control system, from the effects of rapid torque variations in heavy ice. Features of each ship include an air- bubbling system, a forced-heeling system, three 960-kVA alternators driven by Vasa 624TS engines, and extensive facilities for the ship's own maintenance and repair. General-arrangement drawings in the article show the layout of the machinery spaces, which occupy more than half the ship's length. Principal particulars are:- Length 88.6m o.a., 78.5m w.l.; max. breadth 21.2m; draught 6m <6.5m extreme>; displacement 5560 t; classification to USSR Register A2 Icebreaker.
-
Supplemental Notes:
- Shipbuild. Mar. Engng. Intl., 106 <1983>, p.153 <Apr.> (2 pp., 1 tab., 1 diag., 4 phot.)
- Publication Date: 1983
Language
- English
Subject/Index Terms
Filing Info
- Accession Number: 00685085
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Aug 14 1995 12:00AM