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Rotating unbalance system
This document summarizes information about rotating unbalance systems. It discusses vibration caused by eccentric rotating masses in everyday machines like pumps, turbines, and electric motors. It then focuses on pump balancing, explaining that unbalanced components or assemblies can cause vibration and heat buildup, leading to issues like bearing failure. The balancing process aims to align the geometric center and mass center of a rotating assembly by ensuring the actual center of rotation matches the theoretical center. Failure to properly balance pumps can result in problems such as shaft deflection, excessive vibration, seal failures, and catastrophic bearing failures.
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Rotating unbalance system
- 1. Gandhinagar Institute of technology AlAPresentation Subject:- DOM (2161901) Topic name:- Rotating unbalance system Prepared by:- jani Parth (150120119051)
- 2. Contents 1.Introduction 2.Vibration dueto rotating unbalance 3.Pump Balancing
- 3. 1. introduction Vibration dueto rotating eccentric masses is a common Phenomenal that one sees in everyday life such. All rotating machines such as i. Centrifugal pumps ii. Turbines iii.Electric motor
- 4. 2. Vibration dueto rotating unbalance
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- 9. 3. Pump Balancing Pumpsand pump systems are unique, engineered products that require specialized knowledge in all phases of repair, rebuilding and balancing. Pump Maintenance: The Importance of Balancing Pump users may label a problem as misalignment, bad bearings or overheating, but the root cause is often unbalance in a component or pump assembly. Unbalance causes vibration and heat build-up, which result in bearing failure.
- 10. … Some dangers forunbalanced pumps include: • Shaft deflection-a bent shaft or uncontrolled resonance can result in deflection and damage to the entire system • Excessive, unacceptable vibration • Mechanical seal/mechanical packing failures • Catastrophic bearing failures • Seizing-In many pumps, clearances are so close that if the impeller is not well balanced, the vibration could cause the rotating assembly to deflect enough to seize
- 11. … To clarifythe balancing process, we will describe it from the perspective of alignment. Balancing involves aligning the geometric center with the mass center. The geometric centre (manmade) is the center of the rotating shaft and pump impeller assembly. The mass centre is the centre the assembly tries to rotate around naturally. The pump impeller would spin around this axis if it were thrown through the air like a Frisbee.
- 13. Reference 1.https://www.pumpsandsystems.com/topics/pumps/ce ntrifugal-pumps/pump-rebuilding-and-balancing-part- one 2.Vibration by VPsingh 3.http://personal.cityu.edu.hk/~bsapplec/rotating.htm 4.https://www.google.co.in/imghp? hl=en&tab=wi&authuser=0 5.Class work book