US 2019/0292936 A1 · METHOD AND SYSTEM FOR DETECTING SHEAR OF A ROTATING SHAFT

Abstract

Systems and methods for detecting shear of a rotating shaft are described herein. A first measurement and a second measurement of a rotational speed of the shaft are acquired. The first measurement is taken at a first location along the shaft and the second measurement taken at a second location along the shaft. The first location is axially-spaced from the second location. The first and second location are on opposite sides of an expected breakage point of the shaft. A first rate of change of the rotational speed is determined from the first measurement. A second rate of change is determined from the second measurement. Shear of the shaft is detected when the first rate of change is positive and the second rate of change is negative.

Claims20

Dependent claims

A method for detecting shear of a rotating shaft, the method comprising:

acquiring, at a computing device, a first measurement and a second measurement of a rotational speed of the shaft, the first measurement taken at a first location along the shaft and the second measurement taken at a second location along the shaft, the first location axially-spaced from the second location, the first and second location on opposite sides of an expected breakage point of the shaft;
determining, at the computing device, a first rate of change of the rotational speed from the first measurement and a second rate of change of the rotational speed from the second measurement;
and
detecting, at the computing device, shear of the shaft when the first rate of change is positive and the second rate of change is negative.

1 more element

A system for detecting shear of a rotating shaft, the system comprising:

at least one processing unit;
and
a non-transitory computer-readable memory having stored thereon program instructions executable by the at least one processing unit for:
acquiring a first measurement and a second measurement of a rotational speed of the shaft, the first measurement taken at a first location along the shaft and the second measurement taken at a second location along the shaft, the first location axially-spaced from the second location, the first and second location on opposite sides of an expected breakage point of the shaft;
determining a first rate of change of the rotational speed from the first measurement and a second rate of change of the rotational speed from the second measurement;
and
detecting shear of the shaft when the first rate of change is positive and the second rate of change is negative.

4 more elements

Dependencies are inferred from the claim text.

Method and system for detecting shear of a rotating shaft

Life of this patent

Method and system for detecting shear of a rotating shaft

Life of this patent

Abstract

Claims20