mayur shendge seminar ii presentation

8/10/2019 Mayur Shendge SEMINAR II Presentation

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A Seminar II on

VIBRATION MONITORING OF CENTRIFUGALPUMP TO INCREASE PRODUCTIVITY

Presented by

MAYUR SHENDGE


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ABSTRACT

The general availability of pumps can be enhanced byadopting customized programs for in-service equipment

monitoring, to minimize risks of unpredicted failures

Condition monitoring plays an important role in managing themaintenance and operability activities

Review of the main indicators for condition monitoring of a

pumping system

Techniques to acquire and monitor main indicators to predict

pump deterioration and plan timely maintenance operations


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INTRODUCTION

Condition monitoring (or CM) is the process of monitoring aparameter of condition in machinery (vibration, temperature

etc.), in order to identify a significant change which is

indicative of a developing fault

CM has a unique benefit in conditions that would shorten

normal lifespan can be addressed before they develop into a

major failure

In nuclear power plants condition monitoring plays an

important role in optimizing the maintenance activities and

helps to control the safety and economy of the plant

operations.


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INTRODUCTION

Figure 1 below illustrates the change of cost effectiveness

with respect to added value due to improved dependability

for specific maintenance strategies.


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CENTRIFUGAL PUMP

Figure 2: Centrifugal Pump


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CAUSES OF VIBRATIONS

Pumps vibrate to some extent due to response from excitationforces such as residual rotor unbalance, turbulent liquid flow,

pressure pulsations, etc.

Figure 3: Effect of pump vibration on bearing life


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VIBRATION ACCEPTABLE LIMITS AND

STANDARDS

Hydraulic Institute(HI) and American Petroleum Institute (API)Standard (API-610) have set pump vibration limits for general

guidance

Traditionally, 0.35 ips (~ 9 mm/s) was given as a maximumallowable vibration velocity for total all pass (overall)

readings taken on bearing caps or housings.

Machinery vibration and its measurement are complexmatters and may require some clarification


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METHODS OF CM

Pumps vibrate to some extent due to response from excitationforces. The most basic form of vibration analysis is called an

overall vibration measurement.

Figure 4: Experimental setup of Vibration Analysis


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OVERALL VIBRATION MEASUREMENT

This reading provides a single number that describes the total

amount of vibration energy being emitted by a machine. The

idea is that

Figure 5: Location of accelerometer for Vibration Analysis


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OVERALL VIBRATION MEASUREMENT

Figure 7: Comparison of overall vibrations ofpump in healthy, broken impeller and leakage

condition.

Figure 6: Broken

Impeller


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DYNAMIC VIBRATION MONITORING

Figure 8: Sensor output options

Dynamic vibration data canbe used to detect and

diagnose potential

problems months before a

breakdown


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WIRED VIBRATION MONITORING


Wired Vibration Sensorscan be used to measure

Standard frequencies

measure 4 Hz and 2000 Hz


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DYNAMIC VIBRATION MONITORING


Short term and long term trends can be detected with 4-20 mA

monitoring


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The Intelligent Transmitter (iT) Series


The iT Alarm notifiesmaintenance professionals

when vibration levels get

too high

The iT Communication

Module transmits vibration

data to any PC


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WIRELESS VIBRATION MONITORING


The most common wireless is Ethernet RF transmission in thespread spectrum band

Spread spectrum means spreading RF energy across the

spectrum

C C if l


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Computer Centrifugal Pump

Controller Bench with SCADA

Figure 13: EDIBON SCADA SYSTEM

The PBCC is a bench-top unit consists of a centrifugal pumpcomputer controlled, a feed water tank, circulation pipes,

regulation valves, as well as the enough control elements for

the pump experiments: 2 pressure sensors and 1 flow sensor.


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SCADA System Controls

Figure 14: EDIBON SCADA Screen


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SUMMARY

The advances in vibration analysis from conventional systemto wireless technology have lead to modern monitoring

systems that can significantly improve plant productivity

Industrial wireless technologies offer an alternative tohardwired networking and can result in lower costs and better

reliability

Care must be taken to choose the best technology andwireless hardware to insure a successful system


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THANK YOU

mayur shendge seminar ii presentation

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