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BS ISO 21940-21:2022

BS ISO 21940-21:2022

$215.11

Mechanical vibration. Rotor balancing – Description and evaluation of balancing machines

Published By Publication Date Number of Pages
BSI 2022 74
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PDF Catalog

PDF Pages PDF Title
2 undefined
8 Foreword
9 Introduction
11 1 Scope
2 Normative references
3 Terms and definitions
4 Capacity and performance data of the balancing machine
4.1 General
4.2 Data for horizontal balancing machines
4.2.1 Rotor mass and unbalance limitations
12 4.2.2 Production efficiency
13 4.2.3 Rotor dimensions
14 4.2.4 Balancing machine drive data
4.2.5 Torque
15 4.2.6 Type of rotor drive
4.2.7 Brake
4.2.8 Motor and controls
4.2.9 Speed regulation
4.2.10 Couple moment interference ratio, Isc
4.2.11 Air pressure requirements
4.3 Data for vertical balancing machines
4.3.1 Rotor mass and unbalance limitations
16 4.3.2 Production efficiency
4.3.3 Rotor dimensions
18 4.3.4 Balancing machine drive data
4.3.5 Torque
4.3.6 Type of drive to rotor
4.3.7 Brake
4.3.8 Motor and controls
4.3.9 Speed regulation
4.3.10 Couple moment interference ratio
4.3.11 Air pressure requirements
5 Machine features
5.1 Principle of operation
5.2 Machine arrangement
19 5.3 Measuring system
5.3.1 General
5.3.2 Unbalance indicators
5.3.3 Additional features
20 5.3.4 Operation of the indicating system
5.4 Plane separation system
5.4.1 Multi-plane balancing machines
5.4.2 Single-plane horizontal or vertical balancing machines
5.5 Setting and calibration of the measuring system
5.5.1 General
21 5.5.2 Soft-bearing machines
5.5.3 Hard-bearing machines
6 Production efficiency
6.1 General
22 6.2 Time per balance cycle
23 6.3 Unbalance reduction ratio, RUR
24 7 Performance qualifying factors
8 Installation requirements
8.1 General
8.2 Supply requirements
25 8.3 Foundation
9 Proving rotors and test masses
9.1 General
9.2 Standardized proving rotors
27 9.3 User defined proving rotors
9.4 Test masses
9.4.1 General
34 9.4.2 Umar test masses
35 9.4.3 RUR test masses
36 9.4.4 Permissible test mass errors
37 9.4.5 Material
10 Balance machine verification tests
10.1 General
38 10.2 Requirements for evaluating balance machine performance
39 10.3 Test speed
10.4 Test for establishing the minimum achievable residual unbalance, Umar
10.4.1 General
10.4.2 Initial balancing machine setting
41 10.4.3 Unbalance added
42 10.4.4 Readings
10.4.5 Correction
10.4.6 Reference change
10.4.7 Plane setting for Umar test
10.4.8 Test runs
10.4.9 Umar evaluation
43 10.5 Test for unbalance reduction ratio, RUR
10.5.1 RUR tests on single-plane balancing machines
10.5.2 RUR tests on two-plane balancing machines
10.5.3 General
46 10.5.4 Test data sheet completion
10.5.5 Plane setting
10.5.6 RUR test runs
47 10.5.7 Plotting RUR test data
51 10.5.8 Evaluation
52 10.6 Test for couple moment interference on single-plane machines
10.6.1 Starting point
10.6.2 Procedure
10.6.3 Evaluation
10.7 Compensator test
10.7.1 Initial point
10.7.2 Procedure
53 10.7.3 Evaluation
10.8 Simplified tests
10.8.1 General
10.8.2 Simplified Umar test
54 10.8.3 Simplified RUR test
55 Annex A (informative) Information provided by the user to the balancing machine manufacturer
61 Annex B (informative) RUR limit diagrams
64 Annex C (informative) Shafts of outboard Type C proving rotors
66 Annex D (informative) User defined proving rotors for special cases including using a user production part
67 Annex E (informative) Modifications to proving rotors prepared in accordance with ISO 2953 to this document
69 Annex F (informative) Optional repeatability test
71 Annex G (informative) Optional speed range test
72 Bibliography

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BS ISO 21940-21:2022
$215.11