Automatic shaft ground conditioner

Details Automatic shaft ground conditioner Automatic shaft ground conditioner

1991-08-21

1993-08-03

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Discharging or preventing accumulation of electric charge

361221, H05F 300

Patent

active

052334996

ABSTRACT:
Apparatus for automatically cleaning shaft grounding devices in rotating machinery to reduce or eliminate the need for on-line servicing of the grounding devices. When a monitoring system for the grounding devices signals that an excessive electrical charge is present on the shaft, a cleansing material is sprayed at the interface of the grounding device with the shaft to remove any contaminants for the electrical insulating material between the bearings and the rotating shaft, and to re-establish the grounding path from the shaft. Voltage discharge from the shaft to the bearings through the bearing lubricating oil is thereby prevented. Alarm delay of the shaft ground monitoring device allows the apparatus to function automatically, obviating the need for on-servicing by plant personnel or unnecessary shut down of the machinery.

REFERENCES:
patent: 4307432 (1981-12-01), Nishikawa
patent: 4831295 (1989-05-01), Posdel
patent: 4873512 (1989-10-01), Miller
patent: 4939506 (1990-07-01), Gram

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