• 대한기계학회논문집A
• /
• 제37권5호
• /
• pp.707-713
• /
• 2013

커플링 볼트는 조립, 분해 시 작업자의 안전이 고려되는 부분이나 공정 중단의 비용이 중요한 부분에서 기존의 일반볼트를 대체한다. 해양과 발전분야에서 세계적으로 광범위하게 적용되어, 회전하는 플랜지 결합에 사용되어 왔고, 국제적인 국가 선급 협회나 규제기관의 사용을 승인받아 왔었다. 커플링 볼트는 유압식으로 인장되어 플랜지 사이를 안정적으로 단단히 결합한다. 본 논문에서는 발전소 커플링 볼트의 국산화를 위해, 역설계를 통해 현재 사용 중인 볼트의 치수를 측정, 역학적인 수식을 통해 권장 체결하중의 기준을 살펴보았다. 마찰계수는 실험을 통해 선정하였고, 구조해석을 통해 체결상태를 확인하였다. 형상변수에 따른 접촉압력의 변화를 볼트 재설계시 참고할 수 있도록 나타내었다.

• 한국생산제조학회지
• /
• 제19권5호
• /
• pp.667-671
• /
• 2010

The study was aimed at developing a power transmission coupling that is possible to transfer power without any trouble even if the two rotating shafts are making minute misalignment. The coupling that has been developed is Flange Flexible Urethane-key Coupling that connects two shafts by flanges with Urethane-key. A model coupling for use in transmitting power of 10hp was made and undergone performance evaluation and tests. Property and usefulness was proved through the test. The performance evaluation has demonstrated a property of $11.25Kgf{\cdot}m$ of allowable torque and 28.25hp of power at 1,80Orpm, which was found to be superior compared to the performance of similar couplings. Based on the performance test, study was made also for improving the shape of the Urethane-key and was successful to make the flange in smaller outside diameter. Further application test at site has proved that the product is easy to install and maintain, and has property of absorbing minute misalignment between two shafts and vibration caused there from.

• 한국기계가공학회지
• /
• 제12권5호
• /
• pp.57-66
• /
• 2013

This study investigates structural and vibration analyses due to the change of bolt Numbers on models 1 and 2 of flange couplings connected with both sides of axis. As maximum equivalent stresses of models 1 and 2 are 122.05 and 102.3 MPa respectively by the basis of bolt, these stresses are within the allowable stress of this model and the safety of bolt design is verified. As maximum equivalent stresses of models 1 and 2 are 196.2 and 196.4 MPa respectively by the basis of body, these stresses are within the allowable stress of this model and the safety of body design is verified. Through natural frequency analysis, maximum displacements of model 1 and 2 are shown at the frequencies of 6565.1 and 6614.9 Hz respectively. Maximum displacements in cases of models 1 and 2 are shown at harmonic frequencies of 7760 and 7840 Hz at real loading conditions. By putting these study results together, the durability of vibration at model 2 with bolt numbers of 8 becomes better than model 1 with bolt numbers of 6. These study results can be effectively utilized with the design on flange coupling by anticipating and investigating prevention and durability against its damage.