Pompetravaini TRSK 2002/1, Operating Manual, Page: 12 / 32

Operating manual liquid ring vacuum pumps TRVK - TRSK
12
Should the pump operate at high temperatures that could upset the coupling alignment, it is necessary to check the
alignment to secure proper working operation at such operating temperatures.
It is recommended the use of proper hand protections such as gloves, when carrying out the operations listed below
(schematics for various assemblies are shown).
NOTE:
The following points must be followed with the sequence stated above and depending upon the type of
operation: alignment
assembly or alignment verification .
1 - Thoroughly clean motor/pump shaft ends and shaft keys, place the shaft keys in the proper key way slots and fit the
coupling halves in line with the shaft ends. The use of rubber hammers and even pre-heating of the metal half couplings
may be required (see fig. 5). Lightly tighten the set screws. Verify that both pump and motor shafts rotate freely.
HALF COUPLING
ALIGNMENT LINES
PUMP/MOTOR
SHAFT
HALF COUPLING
SET SCREW
Fig. 5
Fig. 6
SUPPORT
FOOT
LANTERN
MOTOR
2 - Insert the perforated metal sheet coupling guard inside the lantern so that the coupling is accessible from one of the
lateral openings. Couple the electric motor to the pump lantern engaging the two coupling halves, hands may reach
the coupling halves through the lateral opening (see fig. 7) tighten the assembly with bolts supplied with the unit and
install the supporting foot, when applicable (see fig. 6).
SAFETY
OPENING
COUPLING GUARD
LANTERN
Fig. 7 - PREPARING TO ASSEMBLE THE MONOBLOCK DESIGN
COUPLING GUARD
FLEXIBLE COUPLING
Fig. 8 - CHECKING THE ALIGNMENT 0N MONOBLOCK DESIGN
3 - Applying slight hand pressure to the coupling guard, rotate it so that one opening of the lantern is accessible (see fig. 8).
4 - Rotate by hand the coupling through the lateral opening of the lantern to make sure the pump is free.
5 - With a feeler gauge, check the distance between the two coupling halves. The gap value "S" should be as listed on
table 2 or as given by the coupling manufacturer.
In the event an adjustment is necessary, loosen the set screws on the coupling half and with a screw driver move the
coupling half to attain the gap "S" (see fig. 12). Then tighten the set screw and rotate the rotor by hand to make sure,
once more, that there is no obstruction.