Gland seal causing Steam Turbine generator to roll under vacuum
Gland seal causing Steam Turbine generator to roll under vacuum
(OP)
Hello,
I am wondering if anyone has encountered a situation where gland sealing steam has made a steam turbine come off the turning gear while at a vacuum. If so, what was the cause or what needs to happen.
I am wondering if anyone has encountered a situation where gland sealing steam has made a steam turbine come off the turning gear while at a vacuum. If so, what was the cause or what needs to happen.





RE: Gland seal causing Steam Turbine generator to roll under vacuum
verify header pressure and adjust for low end of design range. make sure there is no "head" on gauge used to set.
blame damaged inner ring shaft seals for the "pressure" sections.
the "work around" of securing lift pumps should be avoided.
keep oil temperture on the low side during TG opereation
allowing to self spin just above TG speed may not hurt the turbine, BUT could play havoc for the control system. (I am familer with valve pulsing for GE LSTG EHC)
RE: Gland seal causing Steam Turbine generator to roll under vacuum
Have also seen cases where both GV and throttle valve are leaking by to cause the problem you describe.
RE: Gland seal causing Steam Turbine generator to roll under vacuum