SAE International

(R) Balancing Machines - Description and Evaluation Vertical, Two-Plane, Hard-Bearing Type for Gas Turbine Rotors
 N ARP4050A

Annotation

Characteristics of vertical hard-bearing balancing machines are described which make such machines suitable for gas turbine rotor balancing

This document specifies the following

General dimensions and capacities

Performance requirements

Balancing speed ranges

Drive power requirements

Balancing machine spindle flange dimensions

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 predecessor documents ARP588, ISO 2953, and the available technology of hard-bearing balancing machines have been considered in the preparation of this document

This document was developed for hard-bearing balancing machines but may also be used for existing soft-bearing balancing machines

Purpose

The purpose of this document is to delineate the technical specifications for vertical, rotating type, hard-bearing balancing machines for measuring the amount and angle of unbalance corrections required in one or more transverse planes to balance gas turbine rotors. (For Glossary of Terms and Nomenclature, see ISO 1925.)