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At OHP, we are always ready to tackle the most complex challenges in modernizing power transmission systems for yachts and ships. One of the most technical and critical problems we have encountered is the cardan error.
What is the Cardan Error?
In a universal joint or cardan joint, the angle between the driving and driven shafts can cause variations in angular velocity. This variation is known as cardan error or angular velocity fluctuation. When the angle is not correctly aligned, the output shaft does not rotate at a constant speed, even if the input shaft does. This fluctuation results in vibrations, noise, and increased component wear.
Detailed Explanation:
- Basics of the Universal Joint:A universal joint connects two shafts that are inclined relative to each other, allowing torque transmission while accommodating angular misalignment.
- Cardan Error: If the shafts are not perfectly aligned, the universal joint causes the output shaft to accelerate and decelerate twice per revolution. This error is magnified with greater misalignment angles.
- Implications: Cardan error leads to unwanted effects such as vibrations, noise, and mechanical stress, potentially causing premature component failure.
- Mitigation:Minimizing cardan error requires ensuring proper alignment of universal joints and maintaining acceptable angles between shafts. In applications where universal joints are used in pairs, the second joint can be phased to cancel out the angular velocity fluctuations caused by the first joint.
The Challenge
Recently, OHP was faced with a cardan error issue on a specialized vessel where no other company could provide a viable solution. This problem not only affected the yacht's performance but also caused significant damage to the power transmission system components.
OHP Solution
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