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BISOPE series 79- The Relationship Between Flexible Coupling and Vibration 2----------------------------------------------------------------------------

In most cases, a fixed coupling such as a directly connected flange is installed as a method of connecting shafts to each other. This is applied to the design when the equipment is small and the shaft fluctuation is not large. However, flexible couplings are used especially in cases where the characteristics of the equipment are high-speed and large-scale equipment, axial vibration is large, or the thermal growth of the prime mover and driven machine is expected to be different. Of course, it is difficult to install and expensive, but it is said that it can absorb a small amount of shaft misalignment. However, in principle, shaft misalignment should be eliminated from the beginning, and there is no doubt that this is a method to maintain the vibration of the equipment and, furthermore, the life of the equipment for a long time.

 

Types and Vibration of Flexible Couplings

 

Compared to 

Key! Flexible coupling, coupling, rubber coupling, vibration, torsion, torsional frequency, gear coupling.

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BISOPE series 5 General method for naming vibration measuring points mea...

BISOPE series 5-General method for naming vibration measuring points (measuring points)

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In order to effectively measure vibration and perform predictive maintenance, it is necessary to find and set the correct measurement point and store the measured data continuously. A defect in equipment is usually found at the point where vibration shows the highest amplitude, and this may have directionality or may be a point that directly expresses the cause. It is a diagnosis. However, the first starting point for this diagnosis is to name the measurement point, and we will check the internationally common naming method.

 

Measurement point selection rules

If data measurement points are marked on equipment, data are collected from the same location, so trend data has reliability first. The measuring points should be the same as those called on the instrument (route) or on the recording paper (computer file). For example, if the ‘horizontal direction of the motor half-load side’ was measured and saved by the measuring instrument, there would be a way to easily recognize this point and express it simply.

 

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keyword

Vibration Sensor, Accelerometer, HVA, Accelerometer, Vibration Measurement Direction, Vibration Measurement Position, Horizontal, Axial, Inboard, Coupling, DE, NDE, Load Vibration