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Winch load, Wire-Rope Payout & Speed

Winch Control Systems will keep your equipment safe and productive whether it is shipboard, dockside, or underwater.

Our systems are designed for any environment and feature adequate measures for heavy duty use. Data acquisition based on wireless high speed radio telemetry technology, hardwired or with combined communications is available. Internal data logging inside the bespoke sensor or within the Graphical User Interface or Display, external data logging on PC or other hardware platform in combination with our various winch software applications can be provided.

For:

  • Wire and Chain shipboard systems.
  • Dedicated transducer platforms involving strain, torque, shear, weight, tension, compression, position, angle, stroke, line length and line speed, hydraulic pressure, shaft and gearbox torque, power and acceleration.
  • Applications include deck recovery operations, crane-mounted winches, towed body winches, etc.

Winch capacity: winches can lift or pull the highest loads at the first layer, and can lift/pull the least at the top layer. This is due to the “torque arm” effect of the rope spooling on the winch drum. The closer the load is to the drum, the easier it is for the winch to turn and move the load. The further away the load is from the drum, the harder it is for the winch to turn.

Lifting, pulling or towing applications are generally defined as those that require the brake to be engaged to prevent the load from falling or stopping. Either manual or automatic brakes are suitable, although automatic brakes are recommended for lifting applications. Each application has its own specific requirements.

Because of the design criteria and the first layer rating, the ratings for pulling applications are higher for the same winch. Measurements can be taken from the brake reaction load or when the brake is disengaged from hydraulic pressure. Alternative ways of monitoring the load on the winch:

  • Measurement by force sensing clevis pins in the winch foundation (fore or aft depending on the exit angle of the wire-rope).
  • Measurement in remote guide sheaves or pulleys.

Winch speed: Winches generally move the load fastest at the top layer and slowest at the first layer.  This is because the outer diameter of the winch drum is travelling faster than the inner diameter. The same is true for the wire rope.

Ways of monitoring the line speed on the winch:

  • Measurement in front of the winch drum.
  • Measurement in line with the winch drum.
  • Measurement in remote guide sheaves or pulleys.

Electronic accessories

In support of the winch specific load cell application, we supply a broad range of electronic modules, which includes:

  • Analog or digitizing signal conditioning amplifiers and serial interfaces
  • ATEX certified amplifier/barrier interfaces
  • PC/PLC based systems and load indicators
  • Encoder and hydraulic pressure measuring instruments
  • Junction boxes