BS ISO 21940-11:2016 – TC:2020 Edition
$217.84
Tracked Changes. Mechanical vibration. Rotor balancing – Procedures and tolerances for rotors with rigid behaviour
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 95 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 62 | Foreword |
| 63 | Introduction |
| 64 | 1 Scope 2 Normative references 3 Terms and definitions 4 Pertinent aspects of balancing 4.1 General 4.2 Representation of the unbalance |
| 65 | 4.3 Unbalance effects 4.4 Reference planes for unbalance tolerances |
| 67 | 4.5 Correction planes 4.5.1 General 4.5.2 Rotors which need one correction plane only 4.5.3 Rotors which need two correction planes 4.5.4 Rotors with more than two correction planes 4.6 Permissible residual unbalance |
| 68 | 5 Similarity considerations 5.1 General 5.2 Permissible residual unbalance and rotor mass |
| 69 | 5.3 Permissible residual specific unbalance and service speed 6 Specification of unbalance tolerances 6.1 General 6.2 Derivation of the unbalance tolerances |
| 70 | 6.3 Balance quality grade G 6.3.1 Classification 6.3.2 Special designs |
| 73 | 6.3.3 Permissible residual unbalance 6.4 Experimental evaluation 6.5 Unbalance tolerances based on bearing forces or vibrations 6.5.1 Bearing forces |
| 74 | 6.5.2 Vibrations 6.6 Methods based on established experience 7 Allocation of permissible residual unbalance to tolerance planes 7.1 Single plane 7.2 Two planes 7.2.1 General |
| 75 | 7.2.2 Limitations for inboard rotors 7.2.3 Limitations for outboard rotors |
| 76 | 8 Allocation of unbalance tolerances to correction planes 8.1 General |
| 77 | 8.2 Single plane 8.3 Two planes 9 Assembled rotors 9.1 General 9.2 Balanced as a unit 9.3 Balanced on component level |
| 78 | 10 Accounting for errors in the verification of permissible residual unbalances 10.1 General 10.2 Unbalance tolerance 10.3 Combined error of unbalance measurements 10.4 Verification of the permissible residual unbalance 10.4.1 General |
| 79 | 10.4.2 Unbalance readings within tolerance 10.4.3 Unbalance readings out of tolerance 10.4.4 Region of uncertainly |
| 80 | Annex A (informative) Example of the specification of permissible residual unbalance based on balance quality grade G and allocation to the tolerance planes |
| 84 | Annex B (informative) Specification of unbalance tolerances based on bearing force limits |
| 86 | Annex C (informative) Specification of unbalance tolerances based on established experience |
| 88 | Annex D (informative) Rules for allocating unbalance tolerances from tolerance planes to correction planes |
| 91 | Bibliography |
