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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