Case Study: Lovejoy Coupling Degradation/Shaft Misalignment

Slides:

Advertisements

Similar presentations

Machine Condition Monitoring

Advertisements

Pre-alignment: How 15 Minutes Can Save You $$$$$$

Vibration Analysis and Ultrasound PdM

Vibration Analysis (cont)

Motor Leveling MECH 1200 Soft foot Condition: One or more of the mounting feet is not level with the others. Nuts loosen, vibration, misalignment Metal.

Clutch Replacement & Inspection Be sure to mark the Pressure Plate to Flywheel orientation. Loosen bolts in sequence 1/2 turn at a time to prevent warpage.

Jubail Industrial College is pleased to announce Mechanical Engineering Training Short courses For more information, please contact: Special Programs Unit.

MyLock 644D Service Seminar.

Vertical and Horizontal Mills. Vertical Mill Parts u Base and Column u Knee u Saddle u Table u Ram u Tool Head u Quill Feed.

Propulsion Train & Shaft Line Components

Vibration Analysis – Case Study

MINIATURE ENGINEERING SYSTEMS GROUP MINIATURE CENTRIFUGAL COMPRESSOR TESTING Presented by Dipjyoti Acharya.

Improving Mechanical Seal Reliability

Forging new generations of engineers. Couplings A device that is used to connect two shafts together for the purpose of power transmission. General types.

“Pumps” Troubleshooting Guide

BHEL, POWER SECTOR – TECHNICAL SERVICES (HQ), NOIDA

Centrifugal Pump Vibrations: The Causes by Steven J. Hrivnak, P.E. Associate Mechanical Engineer Tennessee Eastman Eastman Chemical Company EASTMAN.

Couplings Nizwa College of Technology.

Vibration Control 1) Control of Excitation Control of Vibration Source. Example: Balancing of Machines 3) Control of System Parameters Change of system.

Dial Indicator 를 이용한 Shaft Alignment 의 이해와 절차

SIGNATURE ANALYSIS Which frequencies exist and what are the relationships to the fundamental exciting frequencies. What are the amplitudes of each peak.

Charging System Service

Terminologies – Alignment and couplings ANGULAR STIFFNESS- A measure of a coupling’s resistance to angular displacement. Measured in mm-N per degree. AXIAL.

Shaft Alignment Nizwa College of Technology.

The main function of a lathe is to turn cylindrical shapes.

Vibration Monitoring & Machine Protection Systems Copyright 1999, Frank Howard, STI Vibration Monitoring, Inc. League City, Texas USA Reciprocating.

© 2012 Delmar, Cengage Learning Ignition System Service Chapter 38.

1 Fuel Pumps. 2 Pumps 1.All oil burners for residential heating have pumps A. They are connected to a motor through a coupling 2.Description A. An oil.

McPherson Strut Service and Diagnosis

Prepared by: Marimuthu Gurusamy Combined vibration analysis (velocity and acceleration envelope) for Prediction of rotating equipment (with rolling element.

Addressing Pump Reliability Problems Matthew A. Gaydon May 9, 2006 Mechanical Solutions, Inc. 11 Apollo Drive Whippany NJ

ENERGY AND VIBRATION Does vibration consume energy?

Module-6 Drilling.

Centrifugal Pump Performance Experiment Presented by: Steven King ME 498 Senior lab November 16, 2004.

Wheel Alignment Geometry. Wheel Alignment Set to Specification Ensures proper tire wear. Ensures proper steering response. Ensures directional stability.

Sockets, Ratchets, and Impacts Speed Wrench - Available in 1/4”, 3/8”, 1/2” Drives.

Failure of Original TF Inner Leg Assembly C Neumeyer 4/10/3.

Engine Maintenance Chapter 6 Inboard Drive Systems.

Predictive Technologies PdM Techniques

Counter Bore. Spot Facing – Provides a true bearing surface for a washer. Counter boring – Provides a recess for a bolt head, bushing or pin.

DEMAS ENGINEERING SERVICES LIMITED. The Condition Based Monitoring maintenance Experts Our Vision To be the most sought after provider of high quality,

XR621 Drive Hose Update Kit. Removal Turn off Battery dis Drain hydraulic tank Remove both rubber lines under chassis and discard. Remove and discard.

Motor is G.E 250 Hp 1750 Rpm Shunt Wound, 500 v Arm 300 V Field CD506AT Frame. Connected to forming extruder gearbox with a 6.66:1 reduction that drive.

Refrigerant compressors Akshay Kr Mishra Sharda University 4 TH YR. MECHANICAL.

Chapter 25 Wheel Alignment. Objectives Define the term “wheel alignment” Inspect tires, steering, and suspension systems before alignment Check and adjust.

STEP 1: ASSEMBLE INSERT PLATES 1.Assemble insert plates by press fitting roller bearing and adapter plate into assembly 1.1 Prep all mating surfaces to.

Machinery Fault Diagnosis A basic guide to understanding vibration analysis for machinery diagnosis. 1.

Desmi Pumps in operation at LHCA P4 & P6

Sub-synchronous Vibration in Jet Pumps (Coke cutting)

Overview Focused on trip that took place on February 19, around 4:11 PM. Includes data to help understand the nature of the trip. Roughly 2 minutes prior.

VERTICAL AXIS WIND TURBINE

Section VII Coupling Design.

Magnetic Couplings Project Advisor Dr. Praveen Malali

Non-Drive End Vertical Motor Bearing Point

How could you Find the Dirty Fuel Filter of your Car

What are the Causes of Engine Ticking Noise in your Car.

Know the Signs of a Bad Engine Mount in Your Car.

محمد منصوری مجتبی فاضلی

Encoder Basics #1 11/8/2018.

CHAPTER 6 Tools and Equipment.

Lock fixed scale vernier scale Vernier Caliper jaws.

Couplings A device that is used to connect two shafts together for the purpose of power transmission. General types of couplings are: rigid: for aligned.

Coupling alignment. Outline:  Introduction  Types of coupling and installation  Preparation of alignment  Tools and types of alignment  Alignment.

Double U-Joint arrangement

What are the Basic Benefits of Wheel Alignment.

Correct Procedures for Changing, Storing, and Maintaining Saw Blades

Quick, low cost solution for rotating Equipment, Misalignment, end Float and Vibration Troubles Learn why Atra-Flex couplings are one of the easiest couplings.

Presentation transcript:

Case Study: Lovejoy Coupling Degradation/Shaft Misalignment Plant Application: Centrifugal Charging Pump Aux Oil Pump Machine Description: 5 hp, 3600rpm coupled to oil pump through Lovejoy 3-jaw coupling. Symptoms: High magnitude vibration all points including axial. Vibration at harmonics of running speed with highest peaks at 3x, 6x, 9x etc Findings/Conclusions: Shaft was misaligned and coupling insert was damaged. 3x/6x/9x pattern is associated with 3-jaw coupling.* * “3x” is shorthand notation for 3 times running speed 11/29/2018

CCP 1B Aux Oil As-Found/As-Left Info Alignment of the pump was found out of alignment from 0.012” to 0.015” angularity (face measurement) and 0.010” on vertical offset (rim). The coupling rubber “spider” was found nearly destroyed. Work performed: The pump was aligned to the motor using the “straight edge and feeler gauge” method. NOTE: The configuration of this pump does not have enough room to utilize the standard Rotolign or dial indicator methods. Some base holes were elongated to allow proper alignment (bolt-bound) Spider was replaced.. Vibration Overalls Position After Before % Change POS 1A ips .0564 .447 87.38 POS 1H ips .0896 .700 87.19 POS 1V ips .0441 .515 91.44 POS 2H ips .0903 .511 82.35 POS 2V ips .0478 .436 89.03 POS 3H ips .0751 .330 77.23 POS 3V ips .0403 .329 87.75 11/29/2018

Axial Spectrum As-Found – At first glance looks similar to looseness Axial Spectrum As-Found – At first glance looks similar to looseness. Closer inspection shows the predominance of 3x/6x/9x which points towards coupling or misalignment. (If pattern peaked at 3x w/o 6x, 9x, diagnosis might be looseness.) 3x 6x 2x 9x 5x 1x 7x 8x 10x 4x 12x 11x 11/29/2018

Axial Spectrum after repair/alignment (note change in scale) Axial Spectrum after repair/alignment (note change in scale). Magnitudes are much lower and 3x/6x/9x no longer predominant 2x 3x 4x 8x 1x 6x 9x 12x 5x 7x 10x 11x 11/29/2018

CONCLUSIONS from Case Study: Lovejoy coupling High 3x is a sign of possible misalignment or coupling problem on a Lovejoy 3-jaw coupling. High 3x / 6x / 9x pattern (vs 3x only) greatly increases the confidence in the diagnosis, because it helps distinguish the coupling problem from a looseness pattern which may contain harmonics 1x 2x 3x 4x etc and may happen to peak at 3x. 11/29/2018