Early Detec­tion and Pre­ven­tion of Rotor Damage

Con­sist­ent ro­ta­tion­al be­ha­vi­or - Rel­ev­ance

Today, the de­vel­op­ment of gas and steam tur­bines tends more and more to­wards lar­ger tur­bines with high­er ef­fi­ciency. At the same time, the de­mands placed on in­di­vidu­al com­pon­ents are grow­ing. Since there is enorm­ous en­ergy in the ro­tors of the tur­bines, it is very im­port­ant to en­sure that the ro­tors run smoothly. Smooth run­ning is achieved by care­ful bal­an­cing and also has an in­flu­ence on the ser­vice life and main­ten­ance in­ter­vals of the tur­bine. The quieter the rotor runs, the lower the mech­an­ic­al load on all com­pon­ents.

Rotor Dy­nam­ic Vibra­tions

Poten­tial dam­age to the rotor

Rotor vi­bra­tions are primar­ily caused by im­bal­ances in the ro­tat­ing com­pon­ents, which are either caused by struc­tur­al or thermal ef­fects or are caused by dam­age to the blades.

In ad­di­tion, res­on­ance phe­nom­ena, the slid­ing bear­ings and the rub­bing ef­fects of the blades on the hous­ing also trig­ger rotor vi­bra­tions.  The re­duced gap di­men­sions due to ef­fi­ciency, how­ever, leave little room for changes in the ro­ta­tion­al be­ha­vi­or of the rotor. Small er­rors can lead to major dam­age.

Ad­di­tion­al ex­tern­al ex­cit­a­tions due to fre­quency fluc­tu­ations in the power net­work can cause tor­sion­al vi­bra­tions and thus fa­tigue the rotor.

Vibra­tion Meas­ure­ment Com­bined with Ana­lys­is and Pro­tec­tion

Our solu­tion for rotor dy­nam­ic Phenom­ena

The in­stall­a­tion of a vi­bra­tion meas­ure­ment sys­tem for com­plete meas­ure­ment, ana­lys­is and, in an emer­gency, pro­tec­tion of the en­tire sys­tem through a pro­tect­ive shut­down. The focus should be on mon­it­or­ing bear­ing vi­bra­tions by means of ac­cel­er­a­tion sensors. Distance meas­ure­ments in the plain bear­ing should be used to mon­it­or shaft and rotor vi­bra­tions. The speed and rotor po­s­i­tion are to be meas­ured syn­chron­ously.

The IfTA Ar­gusOMDS, our all-in-one solu­tion in com­bin­a­tion with flex­ible input and out­put cards and the ana­lys­is soft­ware IfTA TrendView­er solves ex­actly these tasks. The Ar­gusOMDS is used in gas or steam tur­bines for com­mis­sion­ing, bal­an­cing and con­tinu­ous mon­it­or­ing and con­trol. The seam­less long-term stor­age, in­clud­ing the high-res­ol­u­tion raw data from IfTA sys­tems, also en­ables the ana­lys­is of un­fore­seen or sporad­ic events. All data streams con­verge 24/7 in the cus­tom­iz­able sys­tem.

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