TAILIEUCHUNG - Lesson 14- The Shaft System

Tham khảo tài liệu 'lesson 14- the shaft system', ngoại ngữ, anh văn thương mại phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lesson 14- The Shaft System The shafting is a major component of the propulsion plant whose functions can be summed up as follows First to convey the power developed by main engines to the propeller to make it rotate and then to transfer to the hull the propeller reaction resulting from water to cause a vessel to move. A single-shaft system is composed of screw shaft intermediate shaft thrust shaft thrust bearing intermediate bearing compartment stuffing box and stern tube. For a twinshaft system a shaft bracket to be arranged outside the hull because the two shafting centrelines are located at both sides and the stern tubes are farther away from propellers. In this case the stern shaft is to be cut into two pieces one within the stern tube called stern shaft and the other on the shaft bracket termed as screw shaft with the propeller fitted at its end. The first length of the shaft system is referred to as thrust shaft whose construction is different from the intermediate shaft. The thrust shaft possesses a thrust ring matched with a considerable amount of thrust bearings and fitted tightly on the bottom members in a solid structure to withstand the axial push. As stated before it is the thrust shaft and thrust bearings that convey to the hull the propeller reaction to drive a vessel forward. Between the thrust shaft and stern shaft is the intermediate shaft which plays the part of transferring M. E. power and whose number of lengths depends on the hull length and the engine room arrangement. And the bearings to support the intermediate shaft is defined as intermediate screw shaft is to be fitted at stern to extend out of the Fig. 1-main engine máy chính 2-thrust shaft trục lực đẩy 3-thrust bearing ổ đỡ lực đẩy bệ chõi 4-intermediate shaft trục trung gian 5compartment stuffing box hộp làm kín buồng máy 6-intermediate bearing ổ đỡ trung gian 8-stern tube ống đuôi 9-stern shaft trục chân vịt 10shaft bracket giá đỡ trục l 1-propeller chân vịt 12-oil

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