Balancing Machines – Description and Evaluation Vertical, Single-Plane, Non-Rotating Type for Gas Turbine Rotors
|Publication Date:||1 February 2015|
Characteristics of vertical non-rotating balancing machines are described which make such machines suitable for balancing rigid unbladed gas turbine rotors or rotors with fixed, integral blades.
This document specifies:
a. General dimensions and capacities
b. Performance requirements
c. Balancing machine mounting flange dimensions
d. Test procedures
Proving rotors and associated test masses required for the performance tests are described in ARP4162.
Test procedures are described in detail and test log samples along with a polar diagram for evaluating the test results are furnished.
The document ARP5323 for vertical, single-plane, hard-bearing balancing machines, ISO 2953, and the available technology of non-rotating balancing machines have been considered in the preparation of this document.
The purpose of this document is to delineate the technical specifications for vertical, non-rotating type balancing machines for measuring the amount and angle of unbalance corrections required in a single plane to balance disk shaped gas turbine rotors without blades or with fixed, integral blades (for Glossary of Terms and Nomenclature, see ISO 1925).
This document also delineates performance tests to ensure compliance with the document.
This document was prepared to give a general description of balancing equipment capable of balancing disk shaped rotors without loose parts. Standardization of balancing machine to rotor interfaces is intended to enable a set of tooling for a particular component to be used on a variety of machines in one capacity range.
This document may also be used as a general specification for purchasers in procuring suitable vertical single-plane nonrotating balancing machines.
The performance and test requirements may be used for periodic tests and/or after repairs that may have affected the balancing machine's performance. The test procedure shall be the same as described in this document.
The performance and test requirements have been written in terms of "emar" (minimum achievable residual specific unbalance), and A-units rather than fixed physical values, such as grams, millimeters, ounces, or inches (see ISO 1925).