Integrated Drives based in Ornskoldsvik, Sweden has developed a module-based hydraulic motor with an almost unlimited torque range. The Hercules motor is intended for applications where very large torque is required, such as turning turrets, winches, pipe reels, or cable drums. As the system is built using standardized components, Integrated Drives believes it is a cost-effective alternative to traditional open-gear drives.
The modular design also provides high redundancy and reliability. It is available in torque ranges from 1.75 million Nm (equal to 100 kg on a torque arm 1,750 meters long) and upwards. The Hercules motor concept measures from 4 meters in diameter and upwards without limit, and is claimed to be the largest hydraulic motor in the world.
The Hercules is currently undergoing an intensive test program at the Institute of Applied Hydraulics in Ornskoldsvik - due to be completed in June this year - which will cover performance, endurance and environmental tests. The motor is located outside the test building which means it is exposed to the harsh polar winter conditions experienced in the North of Sweden.
The modular concept of the Hercules enables drive systems to be tailor-made from stock items. The simple yet rugged drive system is integrated into the customer's machine enabling it to rotate without gear boxes. Another advantage for offshore applications is that all the controls are located remotely from the motor, such as underneath the drill floor. Unusually for a hydraulic motor, the Integrated Drives system is capable of using water as well as mineral oil as the pressure media which also makes it environmentally sound.
Another possibility is to use the Hercules as a linear motor in applications such as jack-up rigs and other elevation systems. According to Technical Manager Magnus Södersten, the company sees considerable potential in the offshore market for the Hercules motor. "Its high torque coupled with low, controlled speeds, makes the Hercules particularly interesting for applications requiring speeds that are infinitely variable in both directions," says Södersten. "The motor is also very lightweight which will increase its attractions for the offshore market."
For more information contact Magnus Södersten, Integrated Drives: tel +46 660 78681, fax +46 660 78684, E-mail: [email protected]