BS ISO 21940-1:2019
$167.15
Mechanical vibration. Rotor balancing – Introduction
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 40 |
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 7 | Foreword |
| 8 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions 4 Fundamentals of balancing 4.1 General |
| 10 | 4.2 Unbalance of a single disc |
| 12 | 4.3 Unbalance distribution 4.4 Unbalance representation |
| 13 | 5 Factors to consider when balancing 5.1 General 5.2 Rotors with rigid behaviour |
| 14 | 5.3 Rotors with flexible behaviour 5.3.1 General 5.3.2 Shaft-elastic behaviour |
| 15 | 5.3.3 Component-elastic behaviour 5.3.4 Settling behaviour 5.4 Examples of rotor behaviours |
| 16 | 6 Selection of a balancing procedure |
| 17 | 7 Unbalance tolerances 7.1 General 7.2 Permissible residual unbalance 7.2.1 General 7.2.2 Permissible residual unbalance for rotors with rigid behaviour 7.2.3 Permissible residual unbalance for rotors with flexible behaviour |
| 18 | 7.3 Vibration limits 7.4 Influence of modes above service speed |
| 19 | 7.5 Factors influencing balancing procedures 7.5.1 General 7.5.2 Tolerances 7.5.3 Speed and support conditions 7.5.4 Initial unbalance 8 Selection of a balancing machine 8.1 General |
| 20 | 8.2 Special requirements |
| 21 | 9 International Standards on balancing 9.1 General 9.2 Vocabulary 9.2.1 ISO 21940‑2 — Balancing vocabulary 9.2.2 ISO 2041 — Vibration and shock vocabulary 9.3 Balancing procedures and tolerances 9.3.1 General 9.3.2 ISO 21940‑11 — Procedures and tolerances for rotors with rigid behaviour |
| 22 | 9.3.3 ISO 21940‑12 — Procedures and tolerances for rotors with flexible behaviour 9.3.4 ISO 21940‑13 — Criteria and safeguards for the in-situ balancing of medium and large rotors 9.3.5 ISO 21940‑14 — Procedures for addressing balancing errors |
| 23 | 9.4 Balancing machines 9.4.1 ISO 21940‑21 — Description and evaluation of balancing machines 9.4.2 ISO 21940‑23 — Enclosures and other protective measures for the measuring station of balancing machines 9.5 Machine design for balancing 9.5.1 ISO 21940‑31 — Susceptibility and sensitivity of machines to unbalance |
| 24 | 9.5.2 ISO 21940‑32 — Shaft and fitment key convention |
| 25 | Annex A (informative) Mathematical and graphical representation of unbalance |
| 32 | Annex B (informative) Examples of different rotor behaviours as indicated on a typical hard‑bearing balancing machine |
| 38 | Bibliography |
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BS ISO 21940-1:2019 – TC:2020 Edition
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