Engineering and Test Report United States Naval Applied Science Laboratory VDS Towline Flexing Facility.
Abstract
The TOWLINE FLEXING FACILITY has been designed to demonstrate the VDS cable bending fatigue characteristics and reliability. This facility will also demonstrate working repeatability of faired and unfaired VDS tow cables under simulated tow conditions. The VDS towline flexing facility is capable of subjecting VDS towlines to controlled variable tensions while simultaneously driving this cable in a reciprocating motion around a driven sheave. The linear travel of the cable, under test, is adjustable within controlled and specified limits. To enable the test facility to handle various size cables, provisions have been made for the interchangeability of sheaves of various diameters, adapted to a standard type of hub. Cable cycling direction is automatically controlled by cam operated limit switches which are actuated by the drum rotation. These switches energize solenoid operated hydraulic directional control valves which control the direction of drum rotation. Cable tension is controlled and regulated by the hydraulic pressure setting of a relief valve and the 'head end' area of the hydraulic tensioning cylinders. Several protective safety devices are provided.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1971
- Accession Number
- ADA071189