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Recently, Nanjing Gaojing Transmission Equipment Manufacturing Group Co., Ltd. (referred to as: Nangao) subsidiary Nanjing Gaojing Marine Equipment Co., Ltd. produced marine power system complete sets of products (including two sets of adjustable paddles, two main propulsion gearboxes, side Push) and the two tank mud pump gearboxes were successfully matched to the 8000-square "Star Cruises 2" suction dredger and successfully completed the sea trial. Through a large number of tests including overload test, machine joint debugging test, speed test, dredging test, and mud dumping test, the performance is stable and the operation is good. The product performance has been highly recognized by customers and surveyors. Praise. 
It is reported that the model of the tank pump gearbox used in "Xinghangyu 2" is NB1050, the gearbox is vertical and dissimilar (input on, output on the bottom), welded structure. The gearbox is a two-speed gearbox, which can be used to switch between dredging conditions and blowing conditions. Switching between different working conditions (different speed ratios) can be done manually or remotely, and the gearbox comes with a cooler and lubrication system. Among them, the output power corresponding to the low speed gear is 1100kW, the output speed is 217r/min, which is used for dredging conditions; the output power corresponding to the high speed gear is 3300kW, and the output speed is 337r/min, which is suitable for the mud blowing condition. The propeller adopts adjustable paddle, the diameter of the propeller is 4370mm, the diameter of the middle shaft is 280mm, and the shaft diameter of the propeller is 360mm. It can meet the on-site control, with angle locking function, control room control and cab control. The main propulsion gearbox model is CKV08505YCPTOC and the input torque is 71625N.m.
It is reported that “Xinghang浚 2 †is a suction dredger with a capacity of 8,000 square meters. It is built on the basis of the experience of the latest construction of the same type of suction dredgers at home and abroad. The successful trial of the ship marks that the design and development of the power system products and supporting gearboxes of NGC's dredgers have reached the international level, which is a reflection of the company's comprehensive strength. It also shows that the domestic ship equipment has made great progress. It laid the foundation for the design, development and marketing of the company's dredger products.