What are the types of Marine couplings?

Couplings are mechanical parts used to connect two axes (drive shaft and driven shaft) in different mechanisms to rotate together to transfer torque. The two axes cannot be separated when the machine is running, and the two axes can only be separated after the machine is parked and the joint is removed.

Flange coupling (flange coupling) : the advantages of this coupling are low cost, simple overall structure, can transmit large torque, there can be no relative displacement between the two axes, no buffer. It is suitable for use in low speed, no impact, shaft rigidity, small and medium-sized work sites.

Elastic pin coupling: This kind of coupling in operation, torque is passed to the driven shaft through the two half couplings and the nylon pin in the middle. The advantage is that the baffle can be fixed by screws on the outside of the half coupling, and the anti-fall performance is good. In addition, it also has a good cushioning and vibration absorption capacity, can adapt to large axial displacement, mainly used in large axial displacement, more positive and negative changes and frequent starting occasions. But it has a temperature limit, which is limited to between 20 degrees and 70 degrees.

Universal coupling: According to the different torque force, it can be divided into heavy universal coupling, medium universal coupling, light universal coupling and micro universal coupling. In addition, according to the structure shape of the universal coupling, it can be divided into ball cage type, three-pivot type, cross shaft type, etc.

Elastic sleeve pin coupling: the torque capacity of this coupling is quite large, its structure is simple, it is also very convenient in installation and manufacturing, it has a good buffer and vibration absorption also has the ability, the axial displacement between the two axes of the connection is allowed, mainly used in the case of large axial displacement, positive and negative changes more and frequent starting.

Spline coupling: commonly used in aerospace engines such as rocket engine oxidizer pump and reducing agent pump connection.

Gear coupling: commonly used to connect steam turbines with gear reduction boxes, and to connect gear reduction boxes and propulsion shafting through flexible couplings.

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