The JDTS1350 Underwater Reamer Gearbox and NRP250 Fixed Pitch Rudder Propeller Produced by Nanjing High Accurate Marine Passed the Appraisal of New Product

Recently, with the approval of Jiangsu Economic and Information Technology Commission, two kinds of products of Nanjing High Accurate Marine Equipment Co., Ltd., one of the subsidiaries of Nanjing High Accurate Drive Equipment Manufacturing Group Co., Ltd., have passed the appraisal of new products. The two products are JDTS1350 underwater reamer gearboxes and NRP250 fixed pitch rudder propellers.

 
Mr. Chen Yongdao, the General Manager of Nanjing High Accurate Marine attended the Appraisal Meeting in person ( the Forth One from the Right in Front Row)

The appraisal meeting of the two products was held on 8 June, 2013 in Nanjing High Accurate Marine. Nanjing Economic and Information Technology Commission authorized by Jiangsu Economic and Information Technology Commission hosted the appraisal meeting. The identification Committee heard the product trial reports and technical summary report, and reviewed the product technical documents and watched the live demonstration of production,and then made discussion and approved the appraisal of the two products. They agreed that the technology of the two products have reached domestic advanced level.

JDTS1350 underwater reamer gearboxes are adopted advanced modification technology of gear spiral angle to make modification on gear load deformation and transmission shaft torsional deformation. They also applied techniques like twin-engine incorporation structure, mechanical seal combination, holding pressure tightness test etc., and can realize the rated power of 4000kW and the maximum torque of 4450kNm. The maximum working depth is 30m under seawater. The maximum pressure is 0.4MPa and the maximum working angle is 65掳. The product has features of small volume, light weight, great transmission power, long designing life, high compressive strength and anti-corrosion, large dip angle and so on.

NRP250 fixed pitch rudder propellers are applied the optimization design of hydrodynamic theory of lifting line and lifting surface and CFD, which improved the accuracy and efficiency, and inhibited the vibration and cavitation produced by the propeller, and meanwhile improved the propulsive efficiency of the propeller. The modular design can be used for its rudder angle feedback, manual swinging gear, oil drainage tool and hydraulic pressure system . It is easy to make interchange maintenance of propeller parts. The product has features of stable structure, smart and easy installation, etc.