Research and application of repair technology for a ships tailwarping winch
                                                                  ZHANG Qingju1, ZHANG Yuning2, WANG Yang1
（1.Marine Engineering Ltd., Dalian Shipbuilding Industry Co.,Ltd., Dalian 116318, China;2.College of Foreign Languages, Liaoning Normal University, Dalian 116029, China）

Abstract: Aiming at the safety problems caused by corrosion and wear of the parts of a ship's stern cable winch, the repair technology of the base steel plate, the brake hub, the transmission gear, the winch shaft and the bearing bush of the tailtwisting machine were analysed. The technology of replacing base steel plate, positioning of left stranded cable machine, repairing brake hub of rope cylinder and brake force test were analysed. The bending strength and tooth surface contact strength of gear tooth were checked and calculated. According to the clearance of bearing and tooth surface contact, the new bearing was developed. The results indicate that the positioning method of the base of the winch is feasible after replacing the rear deck,the brake force is reliable after the replacement of the brake hub of the rope cylinder,the new hydraulic motor pinion meets the requirements of transmission.

Key words: tailwarping winch; positioning; brake hub; tolerance fit; modification gear; bearing; fit and scrape