Page 249 - Reciprocating Compressors Operation Maintenance

234 Reciprocating Compressors: Operation and Maintenance

FtGURE 4-6. Schematic illustrating the two components of an electronic web
deflection measuring system (Source: Indikon Company, Inc., Somerville, Mass.),

CAUSES OF WEB DEFLECTION

Several factors may contribute to web deflection and must be exam-
ined before, during, and after taking web deflection measurement. Some
of these factors include, but are not limited to:

• compressor support—grouting conditions
• anchor bolts—torque value
• sole plate and chock adjustment and torque
• shim packing, alignment of any compressors, distance pieces, and
cold supports
• rod run-out, proper frame alignment
• main bearings, clearances
• good lubrication, oil analysis
• compressor load, overload
• soil conditions, fill

All of these factors, either solely, together, or in any combination, will
contribute to web deflection and must be addressed and corrected before