ITT Goulds Pumps HS, Инструкция по установке, эксплуатации и обслуживанию

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Alignment of gear type couplings
Gear type couplings are aligned in the same manner as outlined above. However, the coupling covers
must be moved back out of the way and measurements made on the coupling hubs as shown in Figure
Gear Coupling Alignment .
Figure 8: Gear Coupling Alignment
Factors that may disturb alignment
The unit should be checked periodically for alignment. If the unit does not stay in line after being properly
installed, the following are possible causes:
1. Settling, seasoning, or spring of the foundation.
2. Wear of the bearings.
3. Pipe strains distorting or shifting the machine.
4. Springing of the baseplate by heat from an adjacent steam pipe or from a steam turbine.
5. Shifting of the building structure due to variable loading or other causes.
6. Loose nuts or bolts on the pump or driver assembly.
2.4 Stuffing Boxes
In the conventional stuffing box, mechanical seals and packing seal between the stationary and rotating
components of the pump. Generally a clear liquid such as water is forced through the stuffing box to lu-
bricate the sealing elements. The lubricating liquid pressure must exceed the pressure of the pumpage
at the stuffing box. For end suction pumps, lubricating liquid pressure should be 10-15 PSIG higher than
the discharge pressure. For side and double suction pumps, lubricating liquid pressure should be be-
tween 10-15 PSIG higher than the suction pressure.
NOTICE:
To determine suction or discharge pressure, use gauge pressure only.
The piping supplying the lubrication liquid should be fitted tightly to prevent air from entering. On suction
lifts, a small quantity of air entering the pump at this point may result in loss of suction.
Lubrication liquid pressure is controlled by a valve on the outlet piping. Since the liquid leaking from the
stuffing box should be clear, control of the packing lubricant will vary with the condition of the packing.
Increase pressure within the stuffing box by closing outlet valve. Adjustments should be slow and consis-
tent with the run-in procedure for new packing.
The lubricating liquid must be clean, free of grit and acid. Shaft sleeve scoring, packing destruction, and
mechanical seal face damage will result from contaminated lubricant.
2.4 Stuffing Boxes
12 Model HS Installation, Operation, and Maintenance Manual