• 한국기계가공학회지
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• 제19권10호
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• pp.36-43
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• 2020

A marine turning gear is the main auxiliary machine that enables the disassembly of and maintenance on the main engines. In this study, a marine turning gear based on a helical planetary reducer was developed through analysis of a marine turning gear based on a spur planetary reducer. Nonlinear numerical analysis was performed to determine the ideal contact ratio between the sun gear and the idle gear. Based on this, the surface durability, tooth bending strength, and contact ratio were calculated. In addition, the helix direction was selected to utilize the existing bearings. Gears were manufactured based on the helical gear design values, and the turning gear was evaluated using the FTA standards of MAN Co. Ltd. As a result, a lifetime of 3,000 to 5,000 hours was verified, the maximum torque measured was 105kNm, and the efficiency was measured to be 87.4%.

• 한국기계가공학회지
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• 제18권12호
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• pp.7-14
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• 2019

A marine turning gear controls the position of the piston-crank mechanism by rotating the flywheel of the marine engine at a low speed, which is the main auxiliary machine that enables the disassembly and maintenance of the engine. In this study, the safety factor for surface durability and tooth bending strength was improved by the design modification of the marine turning gear based on the spur planetary gear. Angular velocity, torque, and efficiency of the turning gear were measured using a reliability evaluation tester, and a multibody dynamics model for analysis corresponding to the test results was developed. Finally, it was confirmed that the design improvements improved the tooth surface damage of the sun gear in the 3^rd reduction stage.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2016년도 춘계학술대회
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• pp.98-99
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• 2016

본 연구에서는 $360^{\circ}$의 조향 기능을 갖는 듀얼 구동식의 선박 접이안 시스템 개발에 대해 다룬다. 대형 선박의 경우, 부두에 접이안시 bow thruster, side thruster, pod propulsor 등이 사용되고 있으나 최근 해양레저선박이 대형화(슈퍼요트 등)됨에 따라 마리나 시설을 이용할 경우 접이안시 선박 대 선박, 선박 대 계류시설과의 사고가 증가 추세에 있다. 따라서, 이를 해결하기 위한 방안으로 듀얼 구동식 추진체를 이용하여 접이안이 가능한 시스템에 대해 연구를 수행하였다. 주요 내용은 조이스틱을 이용한 선수, 선미의 듀얼 구동과 마그네틱 기어를 이용한 동력 전달이다. 조이스틱에서 두 구동 모터 및 프로펠러로 이어지는 제어 응답성을 확인하고, 전자기 설계를 통한 마그네틱 기어 제작 및 시험으로 수중 추진기에 회전력을 전달 가능한 토크를 확보하였다. 또한, 실해상 시운전을 통하여 개발 시스템의 성능을 확인하였다.