METHOD FOR IMPROVING THE RELIABILITY OF THE SLOT DEVICE OF A GAS TURBINE ENGINE COMPRESSOR Russian patent published in 2022 - IPC G01M15/14 

FIELD: engine technology.

SUBSTANCE: invention relates to the field of engine construction, namely to compressors with a slot device, in particular to methods for improving the reliability of the slot device of the compressor. The expected result is achieved by the fact that in the method for increasing the reliability of the slotted device of the compressor of a gas turbine engine at the stage of compressor refinement, at the first stage, the natural oscillation frequencies of the slotted device of the compressor and its elements F₁, F₂, … F_n are determined, at the second stage, the minimum possible resonant frequency of excitation of the natural oscillations F₀ of the slotted device, where z is the number of the working blades of the compressor stage, above which the slot device is located; n_mg the frequency of low-gas rotation speed, rpm; at the third stage, the natural oscillation frequency of the slot device F₁, F₂, … F_n is compared with the minimum possible resonant frequency of excitation of natural oscillations F₀, if the natural oscillation frequency F₁, F₂, … F_n of the slot device is greater than or equal to the minimum possible resonant frequency of excitation of natural oscillations F₀, then the excitation of resonant oscillations is observed in the slot device, and then at the fourth stage, the actual frequency of resonant oscillations is determined with the detection of the maximum value of the actual frequency of resonant oscillations , at the fifth stage , the ratio of the maximum actual frequency of natural oscillations to the minimum frequency of excitation of oscillations is determined , at the sixth stage, the parameter e_init is determined, the square root of the ratio of Young’s modulus E_init and the density of the material of the slot device: , at the seventh stage, a new material of the slot device with the parameter

, where E_select is Young’s modulus of the new selected material, [Pa]; is the density of the new selected material, [m/s]; and at the eighth stage, the ratio is determined, which is compared with the ratio of the maximum actual frequency of natural oscillations to the minimum frequency of excitation of oscillations , if the selected material of the slot device does not satisfy the conditions of absence of resonance, and then they return to the seventh stage until the condition is met, under which the condition of absence of resonance on the slot device is fulfilled, at the ninth stage, a slot device is made from the selected material and the operability of the compressor slot device is checked.

EFFECT: increased reliability and service life of the compressor.

1 cl, 1 dwg, 1 tbl