Last month, Renold Hi-Tec showed its new DCB-GS 'rubber-in-compression'
coupling for marine drive applications at the SMM International Trade
Fair in Hamburg. Based on the existing DCB range, the new coupling offers
30% weight reduction and a shorter overall length, and under test has
been subjected to 20,000 full torque reversals without evidence of
damage. The fail-safe, long-life design is also able to control resonant
torsional vibration, thus limiting vibration loads in the drive-line
components.
Torsional stiffness is similar to that of the original DCB; however, the
DCB-GS can be tuned independently for lower torque stiffness and accepts
nominal torque ratings of up to 846kNm. Standard DCB rubber blocks are
used, but a range of rubber compound options is offered, to meet the
stiffness and damping requirements of the application.
The new coupling is approved for a range of duties requiring fail-safe,
long-life operation with good vibration damping, including pump and
reciprocating compressor drives.