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BS ISO 21940-21:2022 – TC:2023 Edition

BS ISO 21940-21:2022 – TC:2023 Edition

$280.87

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

Published By Publication Date Number of Pages
BSI 2023 198
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PDF Catalog

PDF Pages PDF Title
1 30468289
125 A-30423423
126 undefined
132 Foreword
133 Introduction
135 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
136 4.2.2 Production efficiency
137 4.2.3 Rotor dimensions
138 4.2.4 Balancing machine drive data
4.2.5 Torque
139 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
140 4.3.2 Production efficiency
4.3.3 Rotor dimensions
142 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
143 5.3 Measuring system
5.3.1 General
5.3.2 Unbalance indicators
5.3.3 Additional features
144 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
145 5.5.2 Soft-bearing machines
5.5.3 Hard-bearing machines
6 Production efficiency
6.1 General
146 6.2 Time per balance cycle
147 6.3 Unbalance reduction ratio, RUR
148 7 Performance qualifying factors
8 Installation requirements
8.1 General
8.2 Supply requirements
149 8.3 Foundation
9 Proving rotors and test masses
9.1 General
9.2 Standardized proving rotors
151 9.3 User defined proving rotors
9.4 Test masses
9.4.1 General
158 9.4.2 Umar test masses
159 9.4.3 RUR test masses
160 9.4.4 Permissible test mass errors
161 9.4.5 Material
10 Balance machine verification tests
10.1 General
162 10.2 Requirements for evaluating balance machine performance
163 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
165 10.4.3 Unbalance added
166 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
167 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
170 10.5.4 Test data sheet completion
10.5.5 Plane setting
10.5.6 RUR test runs
171 10.5.7 Plotting RUR test data
175 10.5.8 Evaluation
176 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
177 10.7.3 Evaluation
10.8 Simplified tests
10.8.1 General
10.8.2 Simplified Umar test
178 10.8.3 Simplified RUR test
179 Annex A (informative) Information provided by the user to the balancing machine manufacturer
185 Annex B (informative) RUR limit diagrams
188 Annex C (informative) Shafts of outboard Type C proving rotors
190 Annex D (informative) User defined proving rotors for special cases including using a user production part
191 Annex E (informative) Modifications to proving rotors prepared in accordance with ISO 2953 to this document
193 Annex F (informative) Optional repeatability test
195 Annex G (informative) Optional speed range test
196 Bibliography

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BS ISO 21940-21:2022 - TC
$280.87