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Probabilistic Analysis of a Rotary Position Sensor and Magnet Circuit
Introduction In the application of a rotary electric actuator it is required to know the rotary position of the output shaft. This has been accomplished by utilizing a Hall Effect ...
File size: 1.25 MB
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Last download: Sat May 05, 2012 05:50:05 PM
17
timesFundamental Principles of Rotary Displacement Meters
Fundamental Principles of Rotary Displacement Meters
Frederick C. Schwarz, Introduction
All rotary piston meters, commonly known as
rotary meters, utilize the fundamental 1846
lobed impeller design of the Roots brothers.
Figure 1
Originally designed for water pump applications,
this fundamental style has been parent to
virtually all interweaving rotor designs applied to
gas and liquid compression, pumping and
measurement applications. The first positive
displacement rotary meters manufactured for
gas applications were built in 1920.
Over time, rotary meters have been continually
improved by use of new modular designs, better
materials, more precise manufacturing
processes and electronics. They have a proven
record of accomplishment of high and
consistent performance. As compared to orifice,
diaphragm and turbine meters. They have better
accuracy, larger turndowns and are relatively
smaller than other mechanical gas meters. This
paper generally describes the fundamental
concepts of rotary meters, installation and
maintenance.
File size: 368.28 KB
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Last download: Sat May 05, 2012 05:52:12 PM
