ISO 21940-1:2019

Mechanical vibration — Rotor balancing — Part 1: Introduction

This document provides a general background to balancing technology, as used in the ISO 21940 series, and directs the reader to the appropriate parts of the series that include vocabulary, balancing procedures and tolerances, balancing machines and machine design for balancing. Individual procedures are not included here as these can be found in the appropriate parts of ISO 21940.

Vibrations mécaniques — Équilibrage des rotors — Partie 1: Introduction

General Information

• Status: Published
• Publication Date: 18-Feb-2019
• ICS: 21.120.40 - Balancing and balancing machines
• Technical Committee: ISO/TC 108/SC 2 - Measurement and evaluation of mechanical vibration and shock as applied to machines, vehicles and structures
• Drafting Committee: ISO/TC 108/SC 2/WG 31 - Balancing
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Jan-2024
• Completion Date: 15-Jan-2024

Relations

• Revises: ISO 19499:2007 - Mechanical vibration — Balancing — Guidance on the use and application of balancing standards
• Effective Date: 06-May-2017

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21940-1
First edition
2019-02
Mechanical vibration — Rotor
balancing —
Part 1:
Introduction
Vibrations mécaniques — Équilibrage des rotors —
Partie 1: Introduction
Reference number
ISO 21940-1:2019(E)
©
ISO 2019

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ISO 21940-1:2019(E)

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ISO 21940-1:2019(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Fundamentals of balancing . 1
4.1 General . 1
4.2 Unbalance of a single disc . 2
4.3 Unbalance distribution . 4
4.4 Unbalance representation . 4
5 Factors to consider when balancing . 5
5.1 General . 5
5.2 Rotors with rigid behaviour . 5
5.3 Rotors with flexible behaviour . 6
5.3.1 General. 6
5.3.2 Shaft-elastic behaviour . 6
5.3.3 Component-elastic behaviour . 7
5.3.4 Settling behaviour . 7
5.4 Examples of rotor behaviours . 7
6 Selection of a balancing procedure .
...