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Aerospace Hand EG-1A Balancing Committee Tests and Testing

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Standard

Vertical Dynamic Balancing Systems – Isolating Repeatability Issues in Challenging Applications
2021-05-26
WIP
ARP8911
This new Aerospace Recommended Practice will serve as a practical resource that offers guidance to both the machine operator and Process Engineer for isolating the source(s) of non-repeatability in measured unbalance data. The content of this standard addresses: • Vertical Dynamic Machine Capability to achieve the specified unbalance tolerances and repeat within those tolerances • Tooling Capability to repeat within the specified unbalance tolerances • Rotor characteristics that may preclude repeating within the required unbalance tolerances.
Standard

STATIC BALANCING EQUIPMENT FOR JET ENGINE COMPONENTS COMPRESSOR AND TURBINE - ROTATING TYPE FOR MEASURING UNBALANCE IN ONE TRANSVERSE PLANE
1975-01-01
HISTORICAL
ARP588A
This ARP specifies those requirements of balancing equipment which make it suitable for the subject class of work. It specifies: a Sensitivity b Accuracy of indication of amount and angle of unbalance. c Ability to measure static unbalance unaffected by couple unbalance. d Machine capacity relating to weight and physical dimensions of the rotors which can be balanced. e Balancing speed of rotation. f Standard balancing machine drive adapter flange dimensions. g Power requirements.
Standard

Proper use of Tooling Compensation
2018-01-05
WIP
AIR6972
To inform users on proper use, procedures and common errors when using electronic compensation for tooling on horizontal and vertical balancing machines
Standard

Moment Weighing Systems – Single-Axis for Gas Turbine Blade Moment Weight Measurement
2016-11-28
WIP
ARP6914
The scope of these standards will relate to single-axis moment scales only. Topics covered include dimensional characteristics of single-axis moment scale interfaces, general tooling requirements, scale and tooling accuracy, and display instrument accuracy requirements. Additionally, general guidelines for qualification of equipment and tooling are included, as are general requirements for single-axis blade distribution software.
Standard

Methods and Criteria for the Balancing of Gas Turbine Rigid Rotors
2015-06-25
WIP
AS6327
This document establishes process parameters for gas turbine rotor balancing. Adherence to the recommendations made herein will facilitate attainment of the usually high degree of accuracy and precision required for jet engine rotor balance.
Standard

Horizontal Balancing Systems - Isolating Repeatability Issues in Challenging Applications
2023-06-05
CURRENT
ARP6911
This SAE Aerospace Recommended Practice will serve as a practical resource that offers guidance to both the machine operator and process engineer for isolating the source(s) of non-repeatability in measured unbalance data. The content of this standard addresses: Machine capability to achieve the specified unbalance tolerances and repeat within those tolerances. Tooling capability to repeat within the specified unbalance tolerances. Rotor characteristics that may preclude repeating within the required unbalance tolerances.
Standard

Balancing Machines: Tooling Design Criteria
2016-10-05
WIP
ARP4163A
This document establishes general design criteria, tolerances, and limits of application for tooling, fixtures and accessories for mounting and driving gas turbine engine rotors on horizontal and vertical balancing machines. For your own safety, while using balancing tooling, regard the safety instructions of the individual supplier.
Standard

Balancing Machines - Verification Test Requirements
2020-08-25
CURRENT
AS8617
This document specifies instructions to verify proper calibration of all balancing machines used for processing gas turbine rotors. Detailed test procedures and test log samples are provided to evaluate the condition of the machine under test. These performance and test requirements may be used for new installations, periodic surveillance, or following repairs that may have affected machine performance. Calibration of the balancing machine is an activity done prior to verification testing and is outside the scope of this document. Troubleshooting of difficulties during the verification tests is also outside the scope of this document; this document is purely an instructive procedure.
Standard

Balancing Machines - Description and Evaluation Horizontal, Two-Plane, Soft-Bearing Type for Gas Turbine Rotors
2012-12-17
CURRENT
ARP587C
The specific performance requirements preceding each test in Section 9 have been written to define certain characteristics of the machine. Conformance with the tests constitutes what is considered minimum proof that the machine will meet these requirements. The test procedures will not prove conformance with all requirements over the full range of all variables, neither will they measure nor define the exact reasons for nonconformance in a given test. Failure of a machine to conform may be due to shortcomings in specific components or to more general reasons such as lack of ruggedness, improper leveling or anchoring to the floor, etc.
Standard

Balance Machine Bode Plot Interpretation
2017-10-16
WIP
AIR6965
Provide a fundamental understanding of reason for completing a bode plot on the balance machine. Discuss potential causes of a resonance within the balance process. Discuss the basis for the WN^2 requirement and how it pertains to the bode plot. Provide guidelines for the usage and interpretation of the bode plot.
Standard

Balance Data Vector Math - Discussion and Usage
2017-10-16
WIP
AIR6964
Provide guidance on how balance machine vector data is captured and reported. Provide an understanding of how to transform balance machine vector data to alternate locations. Provide guidance on how vector imbalances may be used to evaluate and diagnose balance process performance.
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