Mechanical vibration - Balance quality requirements for constant state (rigid) rotors - Part 1: Inspection of specifications and balance tolerances - Scope 1: This part of GB/T 9239 provides specifications for constant state (rigid) rotors and specifies: a) Balance tolerances; b) The number of required correction planes; c) Method for checking residual imbalance. Based on the mechanical type and maximum operating speed of a constant state (rigid) rotor, suggestions have been made for its balance quality requirements. These suggestions are based on domestic and foreign experience. This part of GB/T 9239 specifies acceptance criteria for residual imbalance inspection to coordinate the relationship between manufacturers and users of rotating machinery. GB/T 9239.2 discusses in detail the testing of balance errors and residual imbalances. This part of GB/T9239 does not include flexible rotors, and the balance quality requirements for flexible rotors can be found in GB/T 6557
2 Normative References The clauses in the following documents are referred to in this part of GB/T 9239 and become the clauses of this part. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions do not apply to this section. However, parties to agreements based on this section are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this section. GB/T 9239.2 Mechanical Vibration - Balance Quality Requirements for Constant State (Rigid) Rotors - Part 2: Balance Errors (GB/T 9239,2-2006, ISO 1940-21997, Mechanical Vibration - Balance Quality Requirements of Rigid Rotors Part 2Balance Errors, IDT) ISO 1925:2001 Vocabulary for Mechanical Vibration Balance
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