Flowserve Byron Jackson Type M - Manual (Page 14)

® Byron Jackson Double Mechanical Seal Submersible Pumping Unit • 1042.293/9 • June 04
Page 14 of 68
3 DESCRIPTION
3.1 Configurations
3.1.1 General Description
The Flowserve submersible pumping unit is a
combination of
•
a vertical, oil filled motor with double me-
chanical seal
•
a vertical pump bowl assembly
designed for sustained operation submerged in
water. The motor is positioned directly below the
pump bowl assembly.
The rotating element of the pump bowl assembly is
driven from the bottom where its extended shaft is
connected to the motor shaft by a coupling.
Power is supplied to the motor through a subma-
rine power cable which is fastened to the riser pipe
and extends to the starting equipment. Motor and
pump bowl assembly are connected to the riser
pipe. The riser pipe is threaded or flanged and
coupled in random lengths and the entire unit is
coupled to a wellhead assembly.
Each pumping unit has been individually manufac-
tured according to the special requirements of the
customer. The technical data is given in Chapter
12.2 "Data sheet".
3.1.2 Main Components
A pumping unit consists of
•
Motor
•
Pump bowl assembly
•
Non-return valve
•
Power cable
•
Riser pipe (discharge column)
•
Cable or bracket to fasten the motor power
cable onto the riser pipe
•
Wellhead (surface plate)
•
Terminal box or junction box
•
Tools for installation and maintenance.
NOTE Not all components or sub-
assemblies of a pumping unit are
necessarily supplied by Flowserve
or part of this delivery.
These user instructions apply only
to the components or sub-
assemblies supplied by Flowserve
in this delivery, see Chapter 12.1
"Scope of delivery".
3.1.3 Motor serial number
The motor serial number is on the name plate on
the stator.
3.2 Design of major parts
The motor is filled with, lubricated and cooled by a
special mineral oil of high dielectric strength.
This oil
•
allows high efficiency rotor-stator design,
•
provides excellent insulation and lubrication
qualities, and
•
protects the motor from internal corrosion.
CAUTION The oil used in this pumping unit is
specified in Chapter 12.2 "Data
sheet".
Use of other oil
•
may cause damage to the
pumping unit
•
renders Flowserve's warranty
void.
The motor does not require periodic oil changes.
The oil is circulated within the motor by pumping
action of the thrust bearing disc. Separation be-
tween the motor oil and pump liquid at the shaft
exit is maintained by two mechanical seals.
The motor is pressure compensated.
The double mechanical seal system uses a pres-
sure balance process to equalize the pressure dif-
ferential across the seals, minimizing leakage and
providing years of maintenance free service. The
inner seal diverts any pumped fluid leakage via a
communication line to a storage reservoir at the
bottom of the motor. The motor is vented to the
well by the balance line. As the oil expands, some
oil is pushed out of the motor through the balance
tube. As the oil cools down, pumped fluid is drawn
back into the lower casing at the bottom of the mo-
tor through the balance tube.