1 Scope
This part of GB/T 9239 covers the following:
——identification of errors in the balancing process of rigid rotors;
——assessment of errors;
——guidelines for taking errors into account;
——the evaluation of residual unbalance in any two correction planes.
2 Normative references
The following normative documents contain provisions which, through reference of GB/T9239, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply to this part.
GB/T 9239.1-2006 Mechanical vibration - Balance quality requirements for rotors in a constant (rigid) state - Part 1: Specification and verification of balance tolerances (ISO 1940-1:2003, IDT)
GB/T 4201 Description verification and evaluation of balancing machines (GB/T 4201—×××× ), ISO 2953:1999, IDT)
ISO 1925:1990 Mechanical vibration - Balancing - Vocabulary
ISO 1925:1990/ Amd.1:1995, ISO 1925:1990 Amendment 1
3 Terms and definitions
For the purposes of this part of ISO 1925, the terms and definitions given in ISO 1925 (and its Amendment 1) apply.
Foreword I
Introduction II
1 Scope
2 Normative references
3 Terms and definitions
4 Sources of balance errors
5 Assessment of errors
6 Evaluation of combined error
7 Acceptance criteria
8 Determination of residual unbalances
Annex A (informative) Examples of errors, their identification and evaluation
Annex B (informative) Typical data for checking the algorithm referred to in clause 8 b)
