A 40-ton active heave winch
1st Quarter 2016
Hydraulic systems & components
Hyflo was contracted by Denith Engineering to design and build the electro-hydraulic portion of an active heave compensated (AHC) winch to provide high speed, accurate control of its 40-ton payload. This included 13 hydraulic cylinders, built in accordance with Lloyds rules. The launch and recovery system (LARS) is designed to deploy and recover a crawler, which is responsible for subsea trenching to lay power cables. These are used for off-shore wind farms and are laid up to 600 m below sea level.
The winch is driven by 10 Poclain 5000 cc motors, and is powered by a 1,5 MW power pack. The control is taken care of by two of Moog’s latest NG32 digital axis control valves. These are synced together using a CAN network to control the 3000 l/min of flow required. The valves are mounted on two 1,1 ton manifold blocks, designed and machined in-house by Hyflo.
The AHC winch is designed to keep the payload at a constant height relative to the seabed in a swell of up to 2,5 m. The Moog valves receive three important reference signals. The first is from a motion reference unit (MRU). The second and third indicate the position and tension, and are received from an encoder and load cell respectively. The key to the system is the high speed decentralised control that is directly programmed into the valves. This achieves a loop time of less than 1 ms. The Moog valves are connected to a Profibus network, which allows all the parameters and modes to be monitored and updated.
For more information contact Kribashen Padayachi, Hyflo, +27 (0)21 514 3000, krp@hyflo.co.za, www.hyflo.co.za
Further reading:
Making lines safer with smarter connection
Hydrasales
Hydraulic systems & components
Imagine connecting multiple hydraulic lines or a combination of hydraulic, electrical and grease lines with one single, confident movement. That’s the everyday convenience operators get from Faster’s MultiFaster multi-coupling systems.
Read more...
Hydraulic system upgrades to boost performance and save money
CT Hydraulics (Nqoba)
Hydraulic systems & components
Those working with hydraulic or pneumatic systems know that keeping your machinery running at peak performance balances productivity and cost. As systems age, they often become less efficient, requiring more energy and more frequent repairs. The good news is that you don’t always need to invest in an entirely new machine to solve these problems.
Read more...
Navigating ISO standards in hydraulic cylinder manufacturing
Hydraulic systems & components
For hydraulics professionals, understanding and leveraging ISO standards is a powerful way to ensure quality and gain a competitive edge. Here is a guide to the most critical ISO standards for hydraulic cylinder manufacturing, showing how to use them to your advantage.
Read more...
Heavy impact, smart control
Axiom Hydraulics
Editor's Choice Hydraulic systems & components
Every now and then a project lands on your desk that’s equal parts heavy machinery and fine control - a tantalising mix for any engineer. A client approached Axiom Hydraulics with a project exactly like this.
Read more...
Axiom expands its hydraulic solutions with Powerstart piston accumulators
Hydraulic systems & components
Axiom is proud to announce a unique partnership with Powerworks, introducing a new generation of piston accumulators into the South African market, the Powerstart piston accumulators.
Read more...
Hydraulic systems in heavy machinery
Hydraulic systems & components
In this article, we explore how hydraulic systems function, their role in powering heavy equipment, and why they are the preferred choice for industries requiring immense power and precision.
Read more...
How manufacturers achieve zero-leakage demands in hydraulic cylinders
Hydraulic systems & components
Imagine a world where your hydraulic cylinders never leaked. The answer lies in a holistic approach that focuses on the fundamental components and their interactions, particularly the cylinder rod and its surrounding environment.
Read more...
The seven different types of hydraulic fittings used for cylinders
Hydraulic systems & components
Hydraulic fittings are crucial for maintaining the integrity of hydraulic circuits, Selecting the right type of hydraulic fitting is not only essential for preventing leaks but also for ensuring minimal downtime and enhancing overall system efficiency.
Read more...
The seven different types of hydraulic fittings used for cylinders
Hydraulic systems & components
Hydraulic fittings are crucial for maintaining the integrity of hydraulic circuits, Selecting the right type of hydraulic fitting is not only essential for preventing leaks but also for ensuring minimal downtime and enhancing overall system efficiency.
Read more...
Powering southern Africa’s industrial evolution for over five decades
Editor's Choice Hydraulic systems & components
Established in 1974, Oilpower is a recognised name in South Africa’s hydraulic and pneumatic sector. What started as a small, family-run business has matured into a highly structured operation with specialised teams, experienced engineers and a reputation for technical excellence and reliability. Oilpower is celebrating its 50th anniversary this year.
Read more...
printer friendly version