Balaceamento

FACILITIES INSTRUCTIONS,
STANDARDS, & TECHNIQUES
VOLUME 2-2
Previously Published as: Power O&M Bulletin No. 13

Field Balancing Large Rotating Machinery

ENGINEERING DIVISION
FACILITIES ENGINEERING BRANCH
DENVER OFFICE
DENVER, COLORADO

UNITED STATES DEPARTMENT OF THE INTERIOR
Bureau of Reclamation

Revised January 1983 by Darrell Temple
Mechanical Engineer

Reprinted August 1989
Reprinted June 1994
Internet Version Prepared October 1998

PREFACE

One of the primary responsibilities of the Facilities Engineering Branch is to provide technical assistance to field maintenance personnel. Bulletins such as this are written to provide assistance and knowledge for field personnel to better perform plant operations. Also, it helps to minimize the number of field trips by Denver
Office personnel.
Since the previous edition (No. 13A, 1946) of this bulletin is outdated and more technical than necessary, effort has been made to simplify the procedures and to update the bulletin.

iii

CONTENTS

Page

Theory of balancing ...................................................

1

Instrumentation and measurement................................

2

Vector techniques........................................................

4

Vector addition............................................................

4

Vector subtraction.......................................................

5

Component vectors......................................................

5

Static balancing...........................................................

6

Static balancing - example...........................................

6

Dynamic balancing......................................................

9

Dynamic balancing - example......................................

9

Analytical static balancing - example...........................

16

Analytical dynamic balancing - example.............

17