METHOD FOR OPERATION OF GAS-TURBINE INSTALLATION Russian patent published in 2022 - IPC G01M15/14 

FIELD: gas industry.

SUBSTANCE: invention relates to the field of operation of gas-turbine installations. On a number of serviceable gas-turbine installations containing a gas generator and a power turbine, dependencies of change in a rotational frequency and amplitudes of vibrations of cases of the gas generator and the power turbine on time, are fixed in a set range of rotational frequencies of rotors on rotor freewheel, when the gas-turbine installation is stopped. Critical rotational frequencies are calculated, typical dependencies of change in rotational frequencies of low-pressure rotors, high-pressure rotors, and the power turbine and amplitudes of vibrations by each vibration sensor placed on cases of the gas generator and the power plant on time are formed, current dependencies of values of critical frequencies and amplitudes of vibrations on a specific gas-turbine installation are fixed, compared with typical dependencies, a signal on change in a technical condition of supports of a specific rotor is generated, when current values of critical frequencies and/or amplitudes deviate from typical ones by more than 5%. A typical dependence of change in rotational frequencies of rotors and amplitudes of vibration on time, as well as of critical rotational frequencies, is formed for a specific gas-turbine installation at an initial stage of its operation. In addition, a typical dependence of rotational frequencies and amplitudes of vibrations on time is split on sections by a number of critical frequencies in this range of rotational frequencies of rotors, in each of which a value of a critical frequency and an amplitude of vibrations are determined during its passage and compared with current values on the same section, and a signal on change in a technical condition of a support of a specific rotor is generated, when current values deviate from typical ones on at least one section.

EFFECT: determination of nodes, in which a technical condition is changed, at a stage of permissible operational time without destruction of parts of a gas-turbine installation, which increases its operational efficiency.

3 cl, 2 dwg