DEVICES, SYSTEMS, AND METHODS FOR RELIEVING STRESS
First Claim
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1. A method comprising:
- via a device that originates sub-harmonic vibrations, said device directly attached to a first end of a rotor of an electric motor, applying a first vibration treatment, at a first predetermined sub-harmonic frequency, to said first end of said rotor of said electric motor for a first predetermined time period, said rotor thermally sensitive, said first predetermined sub-harmonic frequency determined based upon a measured first harmonic or resonance frequency, laminations of said rotor strapped to prevent flaring, a shaft and a core of said rotor not coupled via a key, said first vibration treatment adapted to reduce internal stresses in said rotor, thereby reducing a vibration level of said rotor.
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Abstract
Certain exemplary embodiments comprise a method that can comprise, via a device that originates sub-harmonic vibrations, applying a vibration treatment, to a rotor of an electric motor for a predetermined time period. The rotor can be thermally sensitive. The vibration treatment can be adapted to reduce internal stresses in the rotor, thereby reducing a vibration level of the rotor.
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Citations
19 Claims
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1. A method comprising:
via a device that originates sub-harmonic vibrations, said device directly attached to a first end of a rotor of an electric motor, applying a first vibration treatment, at a first predetermined sub-harmonic frequency, to said first end of said rotor of said electric motor for a first predetermined time period, said rotor thermally sensitive, said first predetermined sub-harmonic frequency determined based upon a measured first harmonic or resonance frequency, laminations of said rotor strapped to prevent flaring, a shaft and a core of said rotor not coupled via a key, said first vibration treatment adapted to reduce internal stresses in said rotor, thereby reducing a vibration level of said rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
reducing a measured vibration level of an electric motor rotor via a vibration treatment applied at a determined sub-harmonic frequency to a first end of said rotor for a predetermined time period by a device that originates sub-harmonic vibrations, said device directly attached to an end of said rotor of said electric motor, laminations of said rotor strapped, during said treatment, to prevent flaring, a shaft and a core of said rotor not coupled via a key during said treatment.
Specification