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High
Efficiency, High Volume Applications
Axial flow compressors are designed for high volume, high efficiency, and high reliability applications. These applications include air separation,
 sewage treatment, wind tunnels, and CAES. Two of our primary
applications are FCC air blowers and blast furnaces.
The Dresser-Rand axial-flow compressor line includes six standard frame sizes
that are each available with 3 to 15 stages. Pressure ratio is determined by the number of stages and flow is varied by changing the length of the blades.
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D-R Axial Compressor Flow
Coverage Chart |
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We Design for Performance and Convenience
The Dresser-Rand axial compressors are designed
to provide excellent accessibility by being
horizontally split and providing the variable stator adjusting mechanism outside the casing. Rotor blade replacement can be done individually without removing the rotor from its casing.
Axial Compressor Cross-Section.
Intake and discharge volutes are either fabricated or cast steel and can be arranged upward or downward. The intake volute has flow taps
to provide calibrated flow measurement.
Stator casing located in the compressor center section between the intake and discharge volutes is a two piece design manufactured from cast steel.
Stator vanes are available in three arrangements: fixed, individually adjustable, or
continuously adjustable.
is normally used with variable speed applications.
Individually adjustable blades provide for future changes in operating characteristics or where
occasional blade
adjustment is desired.
Continuously variable blades with automatic control are usually supplied on constant speed applications with frequent changes or fluctuations in
operating conditions.
With continuously variable stators all blades are adjusted simultaneously by a drive ring which is linked to a drive shaft that is automatically adjusted by a electro/hydraulic actuator from a 4-20 ma signal.
Rotor construction can be either disc-on-shaft or tie bolt depending on the number of stages. Rotor blades are a chrome stainless steel that do not require coatings. The inner end is formed into a dovetail section which fits into a mating slot in the rotor disc. Blades are held in place axially by
removable clips and can be easily replaced in the field if necessary, without removing the rotor.
Bearing housings are horizontally split for easy access to all bearing parts without the need for disassembly of the volutes or casing. The bearing housing brackets are bolted and doweled to the casing for positive and permanent alignment.
Bearings, journal and thrust can be one of many choices from the traditional sleeve journal to various tilt pad designs and the original design self equalizing thrust to various self leveling, self equalizing, flooded lube or directed lube designs.
Focused on Performance Improvements
Axial compressor and associated component design is always being reviewed for improvement. Performance increases in existing units can be
provided to maximize flow and efficiency. Incremental options usually exist for
revamping or rerating an axial compressor.
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