3.2 INSTALLATION OF THE MACHINE
3.2.1 Fitting the coupling (double-bearing machine
only)
The coupling must be balanced separately before
assembly on the machine shaft. Refer to the balancing
instructions in chapter 2.2.5.
The shrinking of the half coupling onto the electrical
machine shaft end must be chosen, by the gen-set
manufacturer, in such way as it should be removable for
maintenance (e.g.: bearing change)
3.2.2 Fitting the stator
Four plates on the frame enable the unit to be fitted to a
skid.
The fixing bolts must support the forces created by the
static and dynamic loads.
The machine may be positioned by means of 4 dowel pins.
The dowel pins make later realignment easier. (The use of
pins is optional).
The machine may be aligned through the use of 4 jacking-
screws. These jacking-screws allow the machine to be
positioned according to the various axes.
3.3 MACHINE ALIGNMENT
3.3.1 Alignment general points
3.3.1.1 General points
The alignment aims to obtain the driving shaft and the
driven shaft coaxial when operating at the nominal
conditions (machine rotating; at its operating temperature)
The machine must be aligned according to the Leroy
Somer standard and adhere to the manufacturer's
alignment standard for the drive machine
When heating the machine has its shaft line which grow up.
Between stop and rotation the shaft axis location inside its
bearing is different. The total axis height elevation is
composed of the thermal elevation and of the bearing
elevation.
CAUTION:
THE ALIGNMENT MUST BE DONE TAKING IN
CONSIDERATION OF THE SHAFT THERMAL GROWTH
CORRECTION
The correct locating of the parts must be obtained by
inserting shims under the machine feet.
The double-bearing machines are mounted with bearings
(ball or roller) or Sleeve bearings. The axial clearance of
the bearings (if the machine has Sleeve bearings) must be
distributed as well as possible, taking into account the axial
thermal expansion. The Anti friction-bearing machines with
a positioning bearing (standard machine) do not have axial
play.
The machines are delivered with the rotor mechanically
centered (axially and radially) in relation to the stator.
CAUTION :
THE ALIGNMENT STANDARDS OF MANUFACTURERS
OF DRIVE MACHINES ARE FREQUENTLY MORE
ACCURATE THAN THOSE OF LEROY SOMER
Electric Power Generation
Installation and maintenance
5654
en - 2017.
10
/
a
LSA 5
2
.2
MHV
Industrial Range Alternators
- 4 pole
11
