Functionally reliable even in typhoon storms

Shanghai: Energy supply systems for shipyard cranes successfully in use since years

At the southern port of Shanghai's Pudong area, at the mouth of the Yangtze River, the Waigaoqiao Shipbuilding Co. Ltd. (SWS) is situated just opposite the Changxingdao port area. The Chinese shipbuilder SWS is one of the ten largest worldwide. Three shipyard cranes are currently in operation in this huge industrial area, the dimensions of which correspond to those of 30-storey high-rise buildings. The energy and data supply to the gigantic lifting elements is implemented with plastic energy chain systems from igus.

Profile

What was needed: Roller energy chains in steel guide troughs, chainflex cables, push/pull force detection i.Sense EC.P
Requirements: High corrosion resistance due to aggressive environmental conditions (rain, wind, salt water)
Industry: Shipbuilding
Success for the customer: On-site consultation, installation and acceptance of the energy chain systems, regular testing

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Problem

Waigaoquiao Shipbuilding Co. Ltd. (SWS) was faced with the task of finding a suitable solution for the energy and data supply for the gigantic lifting elements for three shipyard cranes. Due to the special location, the expectations and performance requirements of an appropriate solution were particularly high. At the huge port facility, which is located at the mouth of the Yangtze River, just opposite the Changxingdao port area, there are not only weather influences such as rain, but also whipping winds and the effects of salt water most of the time. These extreme influences are accompanied each year by a two-month rainy season, which poses an additional risk of corrosion and an additional challenge to the energy supply system. In order to avoid plant downtimes, the aggressive ambient conditions had to be countered with a highly functional and reliable response.

Solution

After energy chain systems from igus were installed on over 180m of travel in 2001, they have been running trouble-free ever since, something that even a typhoon could not change a few years ago. The energy and data supply of the shipyard cranes and the 32-tonne material crane is provided by low-friction roller energy chains in igus guide troughs made of steel. The chains are designed for high cable loads and long travels, even at high speeds.In the energy chains, chainflex cables are used. Thanks to their highly wear-resistant TPE outer jacket, they also withstand extreme conditions. The cables are resistant to UV radiation, to corrosion by coolants, lubricants and organic oil and withstand temperatures from -35°C to +100°C.Our push-pull force detection system (i.Sense EC.P) was also installed on this large-scale plant. Also called "PPDS" (Push/Pull Force Detection System), it monitors the displacement forces of the energy chains online to prevent damage to the system as well as failures due to preventive maintenance or remote intervention.

"Since its delivery, the igus energy supply system has been running smoothly and required only minimal maintenance. We have saved enormously on labour and materials as a result."

Zhang Quan, Head of the SWS Development Department

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