Acculign, Inc. © 2014
Benchmark gauges offer a simple, reliable, and effective means of securing hot alignment data for turbomachinery trains by accurately measuring the movement of the machines relative to the machine foundation. With the Acculign system, benchmarks are permanently attached to the foundation and to the machines at or near each bearing location. When the machines are aligned in the cold condition, benchmark gauges are used to measure the distance between pairs of benchmarks.
These measurements are recorded, as are the angles at which the measurements are taken. When the machines are brought on line and attain normal operating temperature, the distances between benchmark pairs are again measured and recorded. Vertical and horizontal movements of the machines can then be calculated from the recorded data, as can actual running alignment of the equipment.
A PC program is provided for these calculations.
EFFECTIVE MEANS OF SECURING HOT ALIGNMENT DATA
An additional advantage of the Acculign system is the ability to reverse the normal procedure to obtain alignment data for equipment already in operation. Benchmarks can be applied to a machine while it is in operation (using proper safety precautions, of course), and the reference measurements taken and recorded. Then, when the machine is taken off line, another set of measurements are taken, along with simultaneous coupling alignment checks. From this data, it can be determined whether or not alignment corrections need to be made. A specific shutdown for alignment checks is often eliminated by the procedure.
PRACTICAL FOR EQUIPMENT ALREADY IN OPERATION
Since their introduction in 1971, Acculign benchmark gauges have gained wide acceptance by industrial users by offering the following advantages:
WIDELY ACCEPTED BY INDUSTRIAL USERS
The Acculign Benchmark Gauge System has been in constant field use since its introduction in 1971.