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GB/T 9239.14-2017 English PDF

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GB/T 9239.14-2017: Mechanical vibration -- Rotor balancing -- Part 14: Procedures for assessing balance errors
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Basic data

Standard ID GB/T 9239.14-2017 (GB/T9239.14-2017)
Description (Translated English) Mechanical vibration -- Rotor balancing -- Part 14: Procedures for assessing balance errors
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard N73
Classification of International Standard 21.120.40
Word Count Estimation 16,174
Date of Issue 2017-02-28
Date of Implementation 2017-09-01
Older Standard (superseded by this standard) GB/T 9239.2-2006
Quoted Standard ISO 1925; ISO 1940-1; ISO 11342; ISO 21940-21
Adopted Standard ISO 21940-14-2012, IDT
Regulation (derived from) National Standard Announcement No. 4 of 2017
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the following requirements: a) Identify errors in the rotor unbalance measurement; b) Evaluate the identified error; c) Focus on the error. This standard provides a balanced acceptance criteria for the balance of the balance after the direct balance and the balance quality determined by the user's late check. Appendix A of this standard lists the methods for reducing the primary typical error.

GB/T 9239.14-2017: Mechanical vibration -- Rotor balancing -- Part 14: Procedures for assessing balance errors


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Mechanical vibration - Rotor balancing - Part 14. Procedures for assessing balance errors ICS 21.120.40 N73 National Standards of People's Republic of China Replacing GB/T 9239.2-2006 Mechanical vibration rotor balance Part 14. Assessment procedures for balancing errors Part 14. Proceduresforassessingbalanceerrors (ISO 21940-14..2012, IDT) 2017-02-28 released 2017-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface III Introduction IV 1 Scope 1 2 normative reference document 1 3 Terms and definitions 1

4 balance error source

Evaluation of the error 3 6 Assessment of Comprehensive Errors 6 7 Acceptance Rules 6 Appendix A (informative) error and its identification and assessment of the example 7

Foreword

GB/T 9239 "Mechanical vibration rotor balance" is expected to be divided into the following parts. - Part 1. Application Note 1); - Part 2. Vocabulary 2); - Part 11. Balance procedures and tolerances for rotors with rigid properties 3); - Part 12. Balance procedures and tolerances for rotors with flexible characteristics 4); Part 13. Field balance criteria for large and medium - sized rotors and safety protection 5); - Part 14. Assessment of balance errors 6); - Part 21. Description and evaluation of balancing machines 7); - Part 23. Other protective measures for balancing machine shields and measuring stations 8); - Part 31. Unbalanced machine sensitivity and unbalance sensitivity 9); Part 3. Criteria for the balance of shafts and fittings. This part is part 14 of GB/T 9239. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part of the replacement GB/T 9239.2-2006 "mechanical vibration constant (rigid) rotor balance quality requirements Part 2. balance error Poor ", compared with GB/T 9239.2-2006, in addition to editorial changes to the main technical changes are as follows. - extends to include rotors with flexible characteristics (see Chapter 1, Chapter 1 of the.2006 edition); - Annex B is deleted from the information item (see Appendix B of the.2006 edition). This part uses the translation method equivalent to ISO 21940-14..2012 "Mechanical vibration Rotor balance Part 14. Assessment of the balance error Assessment procedures ". In this part of the normative reference to the international documents have a consistent correspondence between the following documents. --- GB/T 6444-2008 Mechanical vibration balance vocabulary (ISO 1925..1998, IDT) GB/T 9239.1-2006 Constant quality (rigid) rotor balance - Quality requirements - Part 1. Tests for specification and equilibrium tolerances (ISO 1940-1..2003, IDT) Methods and guidelines for mechanical balance of flexible rotors (ISO 11342..1998, IDT) GB/T 6557-2009 This part of the National Mechanical Vibration, Impact and Condition Monitoring Standardization Technical Committee (SAC/TC53) proposed and centralized. This part of the drafting unit. Changchun Institute of Mechanical Science and Technology Co., Ltd., Shanghai Schenck Machinery Co., Ltd., Shanghai Xinke Testing Machine Co., Ltd. Division, Xiaogan pine forest International Measuring Instrument Co., Ltd., Zhengzhou Machinery Research Institute, Beijing North heavy steam turbine limited liability company. The main drafters of this part. Wang Xuezhi, Wang Lei, Sun Huagang, Guo Qiang, Zhang Shimin, Huang Runhua, An Shengli. This part of the previous version of the standard to replace the release of the situation. --- GB/T 9239.2-2006. Guidelines for the use and application of balancing of mechanical vibration balance GB/T 29714-2013. Mechanical vibration balance vocabulary GB/T 6444-2008. Mechanical vibration - Steady - state (rigid) - Rotor balance - Quality requirements - Part 1. Tests for specification and equilibrium tolerances GB/T 9239.1-2006. Methods and guidelines for mechanical balance of flexible rotors GB/T 6557-1999. Guidelines and protection of on - site balance of medium and medium - sized rotors for mechanical vibration GB/T 28785-2012. Mechanical vibration - Steady - state (rigid) - Rotor balance - Quality requirements - Part 2. Balance error ISO /TS 9239 Technical Corrigendum. 7) revision GB/T 4201-2006 description of balancing machines for inspection and evaluation. 8) Revision GB 12977-2008 Other protective measures for balancer hoods and measuring stations. Mechanical vibration - Machine unbalance sensitivity and unbalance sensitivity. Key words for balancing the mechanical vibration axis and the fitting.

Introduction

The rotor balance quality is evaluated by measuring on the rotor as required by ISO 1940-1 or ISO 11342. These measurements may be included Contains many sources of error. These errors should be taken into account when these errors are sufficiently large to determine the equilibrium quality of the rotor as required. The international standard ISO 1940-1 or ISO 11342 did not consider the balance error in detail, and more importantly, did not consider the balance Error assessment. Therefore, this section gives examples of typical errors and provides the recommended error assessment procedures. Mechanical vibration rotor balance Part 14. Assessment procedures for balancing errors

1 Scope

This part of GB/T 9239 specifies the following requirements. a) Identify errors in the rotor unbalance measurement process; b) assess the identified errors; c) focus on the error. This part of the balance of the balance after the balance and the balance of the quality of the user to determine the balance of the acceptance criteria. Appendix A of this section lists the methods for reducing the primary typical error.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. ISO 1925 Mechanical Vibration-Balancing-Vocabulary11) ISO 1940-1 Mechanical vibration - Constant (rigid) rotor balance - Quality requirements - Part 1. Tests for specification and equilibrium tolerances (Me - chanicalvibation-balancequalityrequirementsforrotorsinaconstant (rigid) state-Part 1. Specifi- cationandverificationofbalancetolerances12)) ISO 11342 Mechanical vibration Flexible rotor mechanical balance method and criteria (Meanicalvibration-Methodsand criteriaforthemechanicalbalancingofflexiblerotors13)) ISO 21940-21 Mechanical vibration Rotor balance Part 21. Description of balancing machines Inspection and evaluation (Mechanicalvibra- tion-RotorBalancing-Part 21. Descriptionandevaluationofbalancingmachines 11) Revised standard number ISO 21940-2. 12) Revised standard number ISO 21940-11. 13) Revised standard number ISO 21940-12.

3 terms and definitions

The terms and definitions defined in ISO 1925 apply to this document.

4 balance error source

4.1 General requirements Balance machine balance error is divided into. a) System error. the magnitude of the error and its phase angle can be evaluated by calculation or measurement; b) random variation error. the number of measurements under the same conditions, the magnitude of the error and phase angle changes are unpredictable;

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