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Superior
Performance Over a Wide Range of Speeds, Loads
and Temperatures
For integrally geared
ISOPAC compressors, Dresser-Rand recommends the KMC Flexure Pivot tilt
pad bearing due to its superior performance. With conventional tilt pad bearings,
brinelling and pivot wear rapidly degrade the pad pivots and bearing shell. The
results are increased bearing clearance and reduced stiffness and damping at the bearing.
These lead to increased rotor vibrations and reduced bearing life. Flexure Pivot tilt pad
bearings are manufactured with a unique integral pivot design. This design allows each pad
to tilt slightly through the deflection, or flexure, of the flexible support web.
| Features |
Benefits |
Unique flexible pad
support structure |
Eliminates brinelling and pivot wear thus
maintaining constant bearing clearance, using less power, and lowering both operating
vibrations and temperatures for longer life |
| Directed lubrication |
Allows higher load capacity
and reduces the effects of hot oil carry-over |
CNC manufacturing
and integral design |
Eliminates tolerance stack-up
and increases control of key bearing dimensions for efficient operation |
Custom design and
optimization |
Results in optimal
rotordynamic performance for reliability |
| Drop-in replacement |
Minimizes downtime; increases
availability |
| Low cost |
Saves money over conventional
tilt pad bearings |
Lower
Cost than Conventional Tilt Pad Bearings
 The tilting action gives Flexure Pivot tilt pad
bearings the same excellent stability characteristics of conventional tilt pad bearings,
while virtually eliminating pivot wear. The result is lower maintenance costs, increased
availability, less power consumption, and lower operating vibrations and temperatures.
Bearing clearance and preload are key design variables affecting machine performance. With
conventional tilt pad bearings, the manufacturing tolerances for the individual pads and
the bearing shell "stack-up" to make it difficult to control these key design
variables. This problem is especially severe for small bearing sizes of less than 4 inches
inside diameter. Flexure Pivot tilt pad bearing pads are machined integral with the
bearing shell, eliminating any tolerance stack-up and resulting in the tightest tolerances
available.
We will continue to offer conventional tilt pad bearings for customers who prefer them.
However, due to superior performance, and the cost savings indicated below, we recommend
the new Flexure Pivot tilt pad bearing.
In addition to Flexure Pivot tilt pad bearings for ISOPAC units, Dresser-Rand provides responsive, reliable technical support, parts, field service, repairs,
upgrades and overhauls on reciprocating engines and process compressors, steam turbines
and turbomachinery.
| Initial
Purchase Savings on KMC FlexurePivot Tilt Pad Bearings |
| ISOPAC Model |
Percent Savings Compared to
Conventional Bearing Assemblies |
ISOPAC 2
3-stage unit |
18% |
ISOPAC 3
3-stage unit |
14% |
ISOPAC4
3-stage unit |
11% |
ISOPAC4
4-stage unit |
10% |
ISOPAC 6
2-inch gearing--2-stage unit |
8% |
ISOPAC 6
2-inch gearing--3-stage unit |
19% |
ISOPAC 6
2-inch gearing--4-stage unit |
20% |
ISOPAC 6
3-inch gearing--2-stage unit |
7% |
ISOPAC 6
3-inch gearing--3-stage unit |
11% |
Flexure PivotTM is a trademark of KMC, Inc.,
a wholly owned subsidiary of Cookson America, Inc.
To obtain more detailed
information on Dresser-Rand's KMC Flexure Pivot tilt pad bearings for ISOPAC units,
contact your Dresser-Rand sales representative or the following:
Dresser-Rand
Chesapeake Service Center
1101 Cavalier Boulevard
Chesapeake, VA 23323
Phone: 757-487-6000 Fax: 757-487-9450
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