First NGC Submerged Cutter-head Gearbox Successfully Put into Use

In the end of 2011, Nanjing High Accurate Marine Equipment Co., Ltd, a wholly subsidiary of NGC successfully developed out the first submerged cutter head gearbox. This gearbox was installed in 鈥淗ua Hang Jun鈥� 6000m3/h cutter dredger, and was put into use since March, 2012.

鈥淗ua Hang Jun鈥� 6000m3/h cutter dredger

The vigorous development of the dredging market, driven by the requirement of large-scale vessel and port and deep channel, also increases the need for dredging gearboxes. Cutter dredger, regarded as the key ship types in dredging vessels takes up more than 60% of the total amount of dredgers. NGC grasps this important developing opportunity to push the R & D of transmission equipment for cutter dredger, and has acquired great achievement.

The first NGC cutter head gearbox is powered at 2脳2000kW, with reduction ratio at 33 and weight at 80T, and is able to work at 30m under water with maximum work angle at 60掳. The cutter gearbox has run for more than 4 months since the sea trial, and among which, over 1 month is non-stop running. It is proved that the gearbox is running well and has received high comments from clients. Currently, several projects regarding the gearboxes for 3500 m3/h cutter dredger, 4500 m3/h cutter dredger, etc are under production.

Submerged cutter-head gearbox

鈥淗ua Hang Jun鈥�, the largest non-propeller cutter dredger in Asia, is mainly applied for the large offshore dredging projects. This dredger is 116m long, 21m wide and 5.3m deep. The total weight is 4036T, and net weight is 1210T. The total power of complete equipment is 22209KW. The dredging speed is 6000 m3/h with the depth at 31m. The main equipments are of the domestically advanced level.