Wednesday, 9 April 2014

Flexible Coupling is here for your need



Guess what companies can easily slim down their investment on pump and motor combination by nodding to Flexible Coupling in order to bid bye to optimum pump/motor interface and for aligning the driven shafts perfectly.  Perhaps this is why in the real world of power transmission, flexible couplings and Vulkan coupling ez spares are required.
Well, when it finally comes to the point of pump selection you should always be aware of the obvious trap, which is of course more the better is not always the case. In fact over-sizing a flexible coupling can in fact result in a serious reduction in required flexibility. It can also cause misalignment compensation and an over sized coupling can also put additional stresses on the pumps and motors being coupled.

On the other hand the flexible coupling that features too much misalignment capacity might turn out to be too soft or too 'compliant' and this may cause vibration or a total unbalanced condition in rotation. As a knowledgeable pump user therefore you should undertake a whole selection procedure that typically depends on the four basic conditions of shaft movement and misalignment such as - parallel misalignment, angular misalignment, end float and  torsional flexibility.

As a matter of fact the torsionally-flexible coupling helps in absorbing and dampening the above mentioned movements. In order to be termed as flexible, the Vulkan coupling ez spares should be able to handle parallel and angular misalignment. In addition, couplings with four-way flexibility  further can accommodate both end-float and torsional movement.

A good example of a four-way flexible coupling with good torsional flexibility is an elastomeric coupling that operates in shear. Their design enables the elastomeric flexible member to deform, or stretch, in shear, displacing under a load. It is also important to be mentioned here that the torsional flexibility of elastomeric shear couplings provides operating protection for the pump user.It also helps in dampening the amplitude of vibrations, thus isolating one shaft from the effects of the other.

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