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Actual Problems in Machine Building. 2016. N 3
Innovative Technologies
in Mechanical Engineering
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22
PROBLEMS IN THE OPERATION OF THE LAST-STAGE BLADES OF STEAM
TURBINES AFTER THE REPAIR
Filippov A. M.
1
, Head of department, Engineer, e-mail:
len103126@yandex.ru, Aleksey.M.Filippov@tplusgroup.ruGolikova E. O.
1
,
Engineer, e-mail:
Evgeniya.Golikova@tplusgroup.ruSidorov A. N.
2
, Director, e-mail:
xpertizapb@mail.ruAzin A. A.
2
, Head of Laboratory, e-mail:
Azin-72@yandex.ru1
PJSC "T Plus", 16 Moskovskaja st., Yekaterinburg, 620014, Russian Federation
2
ExpertizaPB, Ltd, 4/2 Holmogorskaya, Perm, 614083, Russian Federation
Abstract
The existing technologies of repair of worn-out blades of the last stages of steam turbines do not
provide a high degree of operational reliability. After repair of blades by welding the edges with the
installation of protective plates damage to the blades occurs in places of welding of plates, on the
holes for damping wire. The most common causes of damage are fatigue of metal and lack of
proper heat treatment prior to restoration. Considered typical cases of damage of the blades after the
repair. Recommended measures to improve operational properties after repair.
Keywords
blades for steam turbines, repairing, surfacing, damage, metal fatigue, operational properties