NGC Marine System Serves to 8000M3 Hopper Dredger

Recently, marine power system equipments (including 2 sets of controllable pitch propellers, 2 units of propulsion gearboxes and tunnel thruster) and 2 units of dredger pump gearboxes, manufactured by Nanjing High Accurate Marine Equipment Co., Ltd (鈥�NGC Marine Company鈥�), a wholly subsidiary of Nanjing High Accurate Transmission Equipment Manufacturing Co., Ltd (鈥淣GC鈥�) were installed in 8000m3 鈥淴inghangjun 2鈥� hopper dredger and passed the sea trial. After a series of tests, like over load test, engine-propeller combined adjusting test, navigation speed test, dredging test, it is proved NGC products were running at good condition. The clients and surveyor gave very high opinions to our products.

The dredging pump gearbox of 鈥淴inghangjun 2鈥� is typed as NB1050, which is designed with welded vertical offset arrangement (input side is on top, output side is in bottom) and double speed, therefore, the switch from dredging to rain bowing condition can be done via the shifter. The gearbox is equipped with cooler and lubrication system. The switch of different conditions (different ratios) can be done by hand or remote control. The output power of low speed is 1100Kw, and the output speed is 217r/min, which is suitable for dredging; and the output power of high speed is 3300Kw, and the output speed is 337r/min, which is suitable for rain bowing. The diameter of CP propeller is 4370mm, the diameter of middle shaft is 280mm, and the shaft diameter of propeller is 360mm, which is able to satisfy the local control, ECR control and wheel house control, with angle locking function to each control mode. The main propulsion gearbox is typed as CKV08505YCPTOC with input torque at 71625N.m
 

鈥淴inghangjun 2鈥� Hopper Dredger

Rainbowing Test

鈥淴inghangjun 2鈥� hopper dredger is built based on the advanced experience of the similar products both at home and abroad. With one-drive-three engine arrangement and double ratio, the working efficiency of the vessel is improved highly and the working condition is expanded. The successful building of this dredger has a very important meaning in domestic dredger history, and also indicates a big achievement of NGC R & D capability in the power system and gearbox of dredger. The successful sea trial gives NGC more confidence and power to promote out market. Along with the recovery of the marine market, NGC has executed the innovative strategy in marine propulsion and transmission sectors, and for sure NGC Marine Company will make great contribution to domestic marine industry.