D R I E – D Lagertechniek bv DATA SHEETS
D R I E – D Lagertechniek bv DATA SHEETS
D R I E – D Lagertechniek bv DATA SHEETS
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DRIE-D <strong>Lagertechniek</strong> <strong>bv</strong><br />
the right perspective<br />
Kiotoweg 120, 3047 BG, Rotterdam, NL<br />
telephone: (+31) 10 - 462 07 00<br />
telefax: (+31) 10 - 462 07 07<br />
E-mail: mail@drie-d.nl<br />
internet: www.drie-d.nl<br />
OFFSHORE, PIPE-LAY VESSEL, ROLLER BOX SUSPENSION<br />
Application<br />
Each 4 sets of 2 stinger rollers is suspended in a frame, the roller box. The roller boxes originally<br />
were suspended in spherical bearings made of a ‘self-lube pocket bronze’ sphere in a stainless<br />
steel housing. During maintenance it was found that after a year these bearings were virtually destroyed<br />
by electrolytical processes (bronze with graphite and stainless steel in a huge steel construction<br />
in sea water ......) and wear.<br />
Allowable loads on D-glide are very high (>300 MPA) but the stiffness is relatively low and all deformation<br />
is elastic. Since misalignment angles were limited, D-glide bushings with the same dimensions<br />
and geometry as the Sphericals could easily perform the function of the Sphericals. This<br />
solution was proposed on Friday, 17:30, the following Wednesday the bearings were on board the<br />
ship!<br />
Advantages of the D-glide solution<br />
- no moving parts<br />
- virtually ‘undestroyable’<br />
- easy installation<br />
- no corrosion<br />
- very low cost<br />
- short delivery times<br />
Files<br />
Offshore, Pipe lay vessel, 4.jpg:<br />
Various D-glide F parts, 3.jpg:<br />
Picture of the stinger with the roller boxes.<br />
Picture of the ‘D-glide Non-Sphericals’ replacing the spherical<br />
bearings.<br />
data sheets UK, D-glide complete, 2008, page 19
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