NGC Marine Group JDTS1350 Underwater Cutter Head Gearbox Recognized as First Major Equipment (Set) of Jiangsu Province

Few days ago, the JDTS1350 underwater cutter head gearbox of Nanjing High Accurate Marine Equipment Co., Ltd., a subsidiary of NGC Marine Group, was recognized as the first major equipment (set) of Jiangsu Province following a review by relevant authorities. This event indicated that the independent research efforts of Nanjing High Accurate Marine Equipment Co., Ltd. in the dredging equipment field have received full technological and market recognition. The First (Set) of Major Equipment and Key Components of Jiangsu Province Project was established by the Jiangsu Economic and Information Technology Commission. The Project aims to encourage the independent development of high-tech equipment, large complete sets of equipment and the key components in the high-end manufacturing field.

China鈥檚 Twelfth Five-Year Plan for the national development of the ocean economy proposed developments expectation for the shipping industry and marine engineering equipment manufacturing industry. In the future, China鈥檚 waterway construction will continue to improve port layouts along rivers and seas, improve marine outfall channels, enhance inland river navigation conditions, and build a senior waterway network along the Yangtze River, Pearl River and Xijiang River. To this end, the development of the dredging industry is supported and driven by many factors, with good prospects. Moreover, as a very important ship type among dredging ships, the cutter suction dredger accounts for more than 60% of total dredgers, with wide application markets. As the key device of cutter suction dredger, the cutter head gearbox is crucial to the performance of the dredger as a whole. However, advanced technology of key devices like the gearbox for large-scale cutter suction dredgers are concentrated in Europe. To obtain high profits, relevant companies have set up technical blockades for a long time. Dependence on imports has seriously limited the development of Chinese dredging enterprises, and as such, the localization of key components was an urgent necessity for the development of China鈥檚 dredging industry. The JDTS1350 underwater cutter head gearbox with a rated power of 4,000kW, a maximum transmission torque of 4,450kNm, and a maximum working depth of 30m can bear a maximum pressure of 0.4MPa and a maximum working inclination of 65掳. The successful research and development of this product broke the long-time monopoly state of foreign companies and has promoted a localization of dredging equipment.

The review panel unanimously agreed that the advanced equipment adopted state-of-the-art heat treatment methods and machining technology to guarantee the mechanical properties of key components such as the drive line, the safety factor of gear strength and a rich design lifespan. The application of modification technology for high-speed heavy-duty gears significantly improved the smoothness and transmission efficiency of gear engagement. Through a reasonable mechanical analysis, the vibration and deflection of the gearbox during operation reached its minimum. The design鈥檚 unique sealing form further improved the gearbox鈥檚 underwater pressure resistance. Meanwhile, relevant operation parameters of various electrical elements to the gearbox were under real-time monitoring to guarantee a safe and reliable system. The device has obtained three national utility model patent licenses and has applied for two invention patents to form a better intellectual property protection system. Its entire performance has reached, even exceeded, the level of international products. The device has also passed the new product and new technology appraisal of the Jiangsu Economic and Information Technology Commission and the Nanjing Economic and Information Technology Commission, receiving relevant certificates.

Recognition of the JDTS1350 underwater cutter head gearbox as Jiangsu Province鈥檚 first major equipment (set) shows that NGC Marine Group鈥檚 research on cutter head transmission gearboxes for large-scale cutter suction dredger has reached a new level. With fully independent design and continuous improvement of its technology, this product has escaped the cycle in which key technology of cutter head gear box was controlled by others, and has stimulated the Company鈥檚 continuous innovations. The Company has the ability and confidence to compete for a position in the domestic and international markets and to create its own high-technology and high-performance famous-brand product.