关键词: 化学品船, 舵机, 舵叶, 试验问题, 对策

Abstract: In the first trail of the first 25 000 t chemical tanker, the pressure of the steering gear is too higher, and the Zig-Zag test results cannot meet the requirements of the rule. The possible reasons that caused the above test problems are verified and eliminated one by one, such as the selection of steering gear, the transmission of rudder stock, the test instrument, the design and manufacture of rudder blade.It is concluded that the excessive rudder blade area is the root cause of the test problem. A practical solution to cut off the trailing edge of some rudder blades is proposed and implemented. The feasibility of the modified scheme is verified by the sea trial again. The solving process can provide reference for the design of the rudder blades of other new ships.

Key words: chemical tanker, steering gear, rudder blade, test problems, countermeasure