Self-adjusting packing gland for sootblower
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United States of America Patent
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-
Dec 7, 1993
Grant Date -
N/A
app pub date -
Jul 20, 1992
filing date -
Jul 20, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A self-adjusting joint packing for a sootblower of the type having a stationary feed tube gland with an overfitting lance tube which is moved within the combustion device to emit a blowing medium for cleaning purposes. The joint packing gland mechanism causes the axial loading on the joint packing which forms a seal between the lance tube and the feed tube to be automatically adjusted upon each sootblower actuation cycle. The joint packing gland includes an actuator which engages the sootblower frame upon actuation of the sootblower causing relative rotation between the actuator and lance tube. A friction clutch is interposed between the actuator and a threaded gland to transmit rotation only when a packing preload force is below a predetermined level, thus adjusting packing force when needed.
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