Turret bearing structure for vessels

B - Operations – Transporting – 63 – B

Patent

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Details

B63B 21/00 (2006.01) B63B 21/50 (2006.01)

Patent

CA 2274663

A radial bearing structure for radially supporting a turret (14) rotatably carried by a vessel (10) including a plurality of arcuately spaced radial bearing assemblies (74) for radially supporting a rail (38) about the circumference of the turret (14). Each radial bearing assembly (74) has a roller (104) and a follower (94). A pair of concentric spring assemblies (92, 98) continuously urge follower (94) and roller (104) toward rail (38) so that roller (104) remains in contact with the rail (38) at all times. As shown in Figure 7, inner springs (92) have reached maximum radial travel toward rail (38) and do not exert a radial force against follower (94) and roller (104). During maximum lateral movements of the turret (14), outer coil spring (98) forces follower (94) and roller (104) a distance (D) relative to and beyond inner springs (92) to maintain a spring loading against roller (104) for maintaining contact of roller (104) against rail (38). As shown in Figure 8, the inner spring assembly may comprise an elastomer spring (92A) having a plurality of elastomeric pads (93A) separated by metal discs (95A).

La présente invention concerne une structure radiale servant de support radial à une tourelle (14) soutenue de manière rotative par un navire (10) et comportant plusieurs ensembles de supports radiaux espacés en arc (74), afin de maintenir radialement un rail (38) disposé autour de le tourelle (74). Chacun desdits ensembles (74) possède un galet (104) et un suiveur (94). Une paire d'ensembles ressorts concentriques (92, 98) sollicite de manière continue le suiveur (94) et le galet (104) en les poussant contre le rail (38), de sorte que le galet (104) demeure en toutes circonstances en contact avec le rail (38). Comme illustré par la figure 7, les ressorts intérieurs (92) ont accompli un déplacement maximum radial vers le rail (38) et n'exercent aucune force radiale contre le suiveur (94) et le galet (104). Lorsque la tourelle (14) effectue des mouvements maximums latéraux, le ressort hélicoïdal extérieur (98) exerce une force sur le suiveur (94) et le galet (104) afin de les séparer d'une distance (D) par rapport et au delà des ressorts intérieurs (92), de façon à maintenir la charge des ressorts sur le galet (104) et le garder en contact avec le rail (38). Comme illustré par la figure 8, l'ensemble de ressorts intérieurs peut comprendre un ressort élastomère (92A) pourvu de plusieurs plaquettes élastomères (93A) séparées par des disques métalliques (95A).

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