Dynamics of Machines - Unit II-Balancing-Introduction
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This document discusses balancing of machines. It defines unbalanced force as the resultant of all inertial forces acting on a machine's body. Balancing is the process of reducing or eliminating unbalanced forces to acceptable levels. If machines are not balanced, unbalanced forces can cause excessive noise, vibration, wear and damage. Benefits of balancing include increased quality, minimized vibration and stresses, increased bearing life, and reduced power loss. There are two types of balancing: static balancing where a mass can rest at any position, and dynamic balancing where a mass does not vibrate while running. Complete balancing requires the centrifugal force and couple to both be zero.
Dynamics of Machines - Unit II-Balancing-Introduction
- 1. ME8594 - DYNAMICS OF MACHINES UNIT-II-BALANCING (INTRODUCTION) By, Dr.S.SURESH, Assistant Professor, Department of Mechanical Engineering Jayalakshmi Institute of Technology.
- 2. UNIT-II-BALANCING Unbalance force or shocking force The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force
- 3. WHAT IS MEANT BY BALANCING Balancing is the process of designing or modifying machinery so that the unbalance is reduced to an acceptable level and if possible is eliminated entirely.
- 4. Importance of Balancing If the moving part of a machine are not balanced completely then the inertia forces are set up which may cause excessive noise, vibration, wear and tear of the system.
- 5. BENEFITS FOR BALANCING Increase quality of operation Minimize vibration Minimize stresses Increase bearing life Minimize power loss
- 6. Different types of balancing 1. Balancing of rotating masses I. Static balancing II. Dynamic balancing 2. Balancing of reciprocating masses.
- 7. A rotating mass is said to be statically balanced if the rotating mass can rest, without turning, at any angular position it its bearing. (or) A system of rotating masses is said to be in static balance if the combined mass centre of the system lies on the axis of rotation.
- 8. A rotating mass is said to be dynamically balanced when it does not vibrate its running state. (or) A system of rotating masses is in dynamic balance when there does not exist any resultant centrifugal force as well as result couple.
- 9. CONDITION FOR COMPLETE BALANCING The resultant centrifugal force must be zero and The resultant couple must be zero.