Problems of the high-cycle fatigue of the materials intended for the parts of modern gas-turbine engines and power plants

Petukhov, A. N.

doi:10.1134/s0036029510100174

Cited by 6 publications

(3 citation statements)

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“…Slender cylindrical parts, including bearing rings, are most sensitive to the influence of residual stresses. Even small residual stresses occurring in the bearing rings during machining and heat treatment result in significant deformation of the rings and loss of geometrical accuracy [3][4][5][6]. For this reason, the manufacturing process of metal bearing rings includes tempering designed to stabilize the geometric parameters of the product by relaxation of the residual stresses.…”

Section: Introductionmentioning

confidence: 99%

Relaxation of Residual Stresses in Bearing Rings Based on the Optimal Geometric Setup of Equipment for Centerless Running

Королев

Balayev

Iznairov

2019

MSF

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This paper discusses the technological method of residual stress relaxation of bearing rings by centerless running with cylindrical rolls. Described a new approach to relieve residual stresses by centerless running of elastically-deforming rolls on the basis of the geometrical setup of the equipment. It was found that geometrical setup of the equipment influences an elastic strain of parts and the degree of residual stress relaxation. We obtained a mathematical model for calculation of setup parameters to ensure the required variation value of elastic strain of the part. The results of experiments confirm the influence of the geometric setup on the magnitude of residual stress relaxation.

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Section: Introductionmentioning

confidence: 99%

Relaxation of Residual Stresses in Bearing Rings Based on the Optimal Geometric Setup of Equipment for Centerless Running

Королев

Balayev

Iznairov

2019

MSF

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“…Manufacturing of the bearing components throughout the entire production cycle is accompanied by the change of physical and mechanical state of the material and the accumulation of residual stresses. Relaxation of residual stresses happens under the action of dynamic loads during the operation of the finished product, and this leads to changes in the geometric parameters of the bearing components [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Effectiveness of the Vibromechanical Stabilization of Bearing Rings

Balaev

Королев

2018

SSP

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The paper provides the comparison of vibromechanical technology for stabilization of bearing rings and thermal tempering on the following parameters: performance, energy consumption, and magnitude of residual stresses after treatment. To assess the effectiveness of residual stress relaxation through the usage of vibromechanical energy, there were conducted experimental studies on a specially designed and manufactured prototype of the equipment. The results of experimental studies show that the energy consumption during vibromechanical stabilization is ten times less, and performance is several times higher than during the thermal tempering. Moreover, vibromechanical stabilization allows more effective residual stresses relaxation. The costs for capital investment can be reduced, as the cost of equipment for vibromechanical stabilization is ten times less than the cost of electric furnaces.

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“…10,11 At the same time, lots of researches show that high cycle fatigue is one of the key reasons leading to failure. [12][13][14] The carrying capacity of wind turbine is often coordinated with the mean wind speed and the turbulence level. So, in most cases, the acquire life of years in a wind turbine is generally no less than 20 years, whether it is applied to off-shore or on-shore.…”

Section: Introductionmentioning

confidence: 99%

Dynamic reliability of gears in a wind turbine gearbox under the conditions of variable wind speed and small samples

Sun

Chen

Wei

2012

Proceedings of the Institution of Mechanical Engineers, Part C:

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Owing to the characteristics of the variable wind speed and small gear samples, the gear reliability of a wind turbine gearbox is hard to predict. In order to solve this problem, a complete reliability prediction model is presented in this article. Firstly, distribution parameters of the gear stress are deduced according to the variable wind data, and a linear path is defined for the time-varying stress. Next, historical gear samples are transformed into the equivalent prior data by grey relational analysis and then the posterior data is deduced by Bayes data fusion. Then, distribution parameters and a non-linear path are determined for the time-varying gear strength. After that, the dynamic reliability of gears in a wind turbine gearbox is calculated on the basis of the stress–strength interference model and the Monte Carlo sampling. Lastly, an instance is given to verify the validity of this model. The result shows that the variable wind speed will decline the reliability of wind gears, in addition, the reliability declines faster than its expectation in the infant mortality period.

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Problems of the high-cycle fatigue of the materials intended for the parts of modern gas-turbine engines and power plants

Cited by 6 publications

References 0 publications

Relaxation of Residual Stresses in Bearing Rings Based on the Optimal Geometric Setup of Equipment for Centerless Running

Relaxation of Residual Stresses in Bearing Rings Based on the Optimal Geometric Setup of Equipment for Centerless Running

Experimental Study of the Effectiveness of the Vibromechanical Stabilization of Bearing Rings

Dynamic reliability of gears in a wind turbine gearbox under the conditions of variable wind speed and small samples

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