Dynamic Loading Journal Bearing Test Rig Christina Amendola | Kevin - - PowerPoint PPT Presentation

Dynamic Loading Journal Bearing Test Rig

Christina Amendola | Kevin Burnett Michael Bush | Anthony DePina | Molly Mariea

Reciprocating Compressors

Also known as a positive-displacement compressor or piston compressor produces high pressure gas by crankshaft driven piston.

Pictures From: http://pixshark.com/reciprocating-gas-compressor.htm Content Adapted From: http://en.wikipedia.org/wiki/Reciprocating_compressor

Applications:

• Oil refineries
• Gas pipelines
• Chemical plants
• Natural gas processing plants
• Refrigeration plants

Process: 1. Intake gas enters suction manifold 2. Gas flows into compression cylinder a. Compression occurs by reciprocating piston driven b. via crankshaft 3. Gas is discharged

Journal Bearings

• Also known as plain bearings consist of journal (shaft) that rotates freely in supporting metal sleeve (shell)

○ Consists of no rolling elements

• Oils or grease used for cooling and to flush contamination (seen in bottom right picture)

○ High-speed journal bearings are always lubricated with oil

• Grooves in the bearing shell are used to distribute the oil throughout the bearings’ surfaces

Pictures and Content Adapted From: http://www.machinerylubrication.com/Read/779/journal-bearing-lubrication

Journal Sleeve

Why a test rig?

Currently replacing the journal bearing in a reciprocating compressor takes approximately half a day P14453 replicated the compressor environment but could not achieve the dynamic loading associated with a Dresser-Rand ESH-1 reciprocating compressor. Below is their prototype Our team, P15453, was tasked with adapting the test rig to accurately achieve load profile that bearing experiences in compressor while adding add data acquisition capabilities Last year’s team, P14453, was tasked with creating test rig that replicated journal bearing environment and allowed much quicker bearing replacement time

Required Loading Profile

Force in Y Force in X The loading profile in a reciprocating compressor resembles a sine wave as seen to the right. Position This oscillatory motion requires a back and forth movement in both the x and y direction. Force X: ~900 lbf at 6Hz Y: ~200 lbf at 6 Hz

Pictures and Content Adapted From: Holzenkamp, Markus, "Modeling and condition monitoring of fully floating reciprocating compressor main bearings using data driven classification" (2013). Thesis. Rochester Institute of Technology.

Achieving Actuation Comparing All Options

Electromechanical Actuators (EMA) Piezoelectric Actuators

Pictures From: Moog and Wikipedia

Achieving Actuation Top Options

Achieving Actuation Final Selection: Electromechanical Actuators

Data Acquisition

ASEE Conference: Syracuse, NY

Moog’s Visit

Special Thanks to...

&

for their financial support and technical expertise

Acknowledgments

Team P15453 would like to express our most sincere gratitude to Dr. Jason Kolodziej, William Nowak, Joe Dyer, Jim Kowalski, Scott Delmonte, Steve Lucchesi, and Dr. Stephen Boedo for their guidance throughout the design and build phase. We would also like to acknowledge the RIT Machine shop staff: Robert Kraynik, Jan Maneti, Dave Hathaway, and Ryan Crittenden for their continuous assistance and support.