Shaft bearing wear detector
First Claim
1. An apparatus for detecting non-concentric rotation of a rotating component, comprising:
- a surface operatively positioned to be contacted by an end of the part should it rotate non-concentrically;
a sensor operatively mounted on the surface to detect vibrations induced in the surface, including vibrations produced by contact between the rotating component end and the surface, and to generate a vibration signal; and
an electrical circuit operatively coupled to the sensor and configured to process the vibration signal generated by the sensor, the electrical circuit determining if a number of signals of sufficient strength so as to represent possible impingement upon the surface by the rotating component occur within a predetermined time frame.
1 Assignment
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Accused Products
Abstract
An apparatus and method for detecting shaft misalignment wherein a sensor is employed to detect contactings between a non-concentrically rotating component and a surface and to generate an electrical signal corresponding thereto, and wherein a signal processing circuit coupled to the sensor is configured to determine whether the signal received from the sensor is characteristic of a signal that is expected whenever a rotating component contacts the surface, and if so, whether the number of signals received exceeds the minimum number expected within a predetermined time interval on the occasion of contact between a rotating component and the surface.
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Citations
51 Claims
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1. An apparatus for detecting non-concentric rotation of a rotating component, comprising:
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a surface operatively positioned to be contacted by an end of the part should it rotate non-concentrically; a sensor operatively mounted on the surface to detect vibrations induced in the surface, including vibrations produced by contact between the rotating component end and the surface, and to generate a vibration signal; and an electrical circuit operatively coupled to the sensor and configured to process the vibration signal generated by the sensor, the electrical circuit determining if a number of signals of sufficient strength so as to represent possible impingement upon the surface by the rotating component occur within a predetermined time frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for detecting non-concentric rotation of a magnetic driver shaft or a magnetically driven shaft which are isolated from each other by means of a containment canister shaft, comprising:
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a sensor mounted to detect vibrations in the canister, including vibrations produced by contact between one or both shafts and a surface of the canister, and to produce a vibration signal; and an electrical circuit operatively coupled to the sensor and configured to process the vibration signal produced by the sensor, the electrical circuit determining if a number of signal pulses of a type characteristic of those expected when the containment canister has been impinged upon by a rotating pump component have been detected within a predetermined time frame. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. In a magnetic drive pump having a magnetically driven shaft isolated from a magnetic driving field by means of a containment canister, the improvement comprising:
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a sensor operatively mechanically coupled to an exterior surface of the containment canister to detect vibrations induced in the canister, including vibrations produced by contact between the driven or driver shaft end and an interior or exterior surface of the canister, and to produce a vibration signal; and an electrical circuit operatively coupled to the sensor and configured to process the vibration signal produced by the sensor, the circuit determining if an excessive number of signal pulses representing vibration levels of the canister on the order of those expected whenever the canister is struck by a rotating component occur within a predetermined time frame. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A process for detecting non-concentric rotation of a shaft in a magnetic drive pump, the magnetic pump having a magnetically driven shaft isolated from a magnetic driving field by means of a containment canister isolating the driven shaft from the driving field, the process comprising the steps of:
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sensing vibrations in the containment canister; producing an electrical vibration signal relating thereto; and processing the electrical signal to determine if an excessive number of signals representing vibrational levels of the canister of sufficient magnitude to warrant an inference of impingement of a rotating component upon the surface of the canister are detected within a predetermined time interval. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification