Pompa ad Ingranaggi - Serie MX
Gear Pump - MX Series
37
f) check that the pump axis and the motor axis are perfectly coaxial, since an offset would
cause a radial force whose strength may reduce the life of the pump or motor.
g) leave an axial clearance of approximately 2 - 3 mm between the 2 couplings, so as to
avoid stresses induced by axial forces and thermal expansions.
In case of connection by
magnetic coupling
, proceed as follows:
a), b), c), d) proceed as in the case of the flexible coupling;
e) verify the coaxiality between the inner magnet cover and the outer magnet cover, by ac-
curately measuring
R
, difference between the outer cover diameter d and the external
outer magnet diameter
D1
. This measurement should be made on at least 4 points at
90°; if different values are found in various measurement points, properly place calibrat-
ed shims so as to perfectly align the pump unit;
f) the non-perfect coaxiality causes differences in the air gap which induce variations of
the magnetic pull force on the inner magnet with consequent radial forces on the shaft
and wear of bushes;
g) it is also essential to avoid generating axial stress on the inner magnet, which would
cause the consequent premature deterioration of bushes, by leaving the outer magnet
free to position itself axially. After positioning the pump and the motor, it is therefore
necessary to unscrew the coupling fastening grub screw on the motor shaft and retight-
en it after the magnet has moved to its balance position.
Verify that the end of the motor shaft is at a distance of at least 2 - 3 mm (axially) from
the inner magnet cover.
It is advisable to mark by two dowel pins the position of the pump on the baseplate, so
as to make the assembly easier after maintenance operations.
When centering the outer magnet, pay particular attention to the effects of the mag-
netic pull force; in particular pay attention to your fingers (always use safety gloves)
and not to damage magnets with accidental shocks.
We recommend to use tools in non-magnetic material.
The User shall place a rigid coupling guard on the flexible or magnetic coupling: it shall be
machined so as to prevent access to moving parts.
Such coupling guard shall be firmly secured to the baseplate.
YES
NO