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Problems of ensuring vibration reliability of power equipment

https://doi.org/10.24223/1999-5555-2024-17-4-253-260

Abstract

The article discusses general issues related to ensuring vibration reliability of steam turbines, various factors that can cause increased vibration of turbine units, including design, technological, and operational factors. Special interest is given to hidden factors that can be detected only indirectly through analytical methods by studying the complex “turbine unit – foundation – base” (TFB) system. For example, increased stresses in the structure and, accordingly, zones of probable crack development due to seismic subsidence of supports or high vibrations can be detected. Such defects can be the subject of study in so-called predictive analytics. It is shown that ensuring vibration reliability requires a systematic approach. Among the many causes of vibration, it is always necessary to identify the most significant primary causes. Requirements for ensuring reliability at different stages of the creation and operation of a turbine unit are formulated. A stability diagram of the turbine unit is provided, where the stability boundaries are presented for the first time as functions of the main parameter of the working fluid flow through the turbine unit. It is shown that the foundation requirements in RD 34 15.078-91 are outdated and do not meet modern reliability standards for turbine units. The main defects in the assembly of the shaft line are listed, and the primary requirements for the assembly of rotors in half-couplings are formulated. The need for machining bearing liners to create a cylindrical boring surface is emphasized, and scraping the surface for this purpose is not recommended. For the first time, the need for grinding the ends of half-couplings after their deformation due to bolt tightening to half the yield strength is indicated. This is important because residual deformations are detected at the ends of the half-couplings, which hinder the quality of the half-coupling fit.

About the Authors

A. I. Kumenko
National Research University «Moscow Power Engineering Institute»
Russian Federation

Krasnokazarmennaya str., 14, 111250, Moscow 



A. M. Mironov
JSC "Power Machines"
Russian Federation

Vatutina str., 3, lit. A, 195009, St. Petersburg 



M. I. Shklyarov
JSC "Power Machines"
Russian Federation

Vatutina str., 3, lit. A, 195009, St. Petersburg 



A. I. Mozgunova
National Research University «Moscow Power Engineering Institute»
Russian Federation

Krasnokazarmennaya str., 14, 111250, Moscow 



References

1. Kostyuk A. G. Dynamics and strength of turbomachines. – 3rd ed., reprint. and add. – M: Publishing House of MEI 2007: 1 – 476.

2. Kumenko A. I. Improvement of computational and experimental methods for studying the dynamic characteristics of turbine units and their elements: diss. ... doct. Technical sciences. – M.: MEI 1999: 1 – 349.

3. Determination of the alignment of the supports and corrective alignment of the rotors of turbine units, taking into account the measurements of the ascent of the rotor necks: MP 1.1.4.04.1689 – 2020. Methodological recommendations. Approved by the order of the REA Concern No. 9\01\1956-L dated 03.12.2020.

4. Development of elements of a system for monitoring the technical condition of turbine units of thermal power plants and nuclear power plants / A. I. Kumenko, V. N. Kostyukov, N. Yu. Kuzminykh et al. // Teploenergetika 2017, 8: 17 – 23.

5. The use of shaft position sensors for modeling the misalignment of shaft supports of turbine units / A. I. Kumenko, V. N. Kostyukov, N. Yu. Kuzminykh, A.V. Timin // Thermal power engineering 2017, 9: 41 – 51

6. Kumenko A. I., Tokaev A. S. Systems for monitoring and diagnostics of the technical condition of turbine units of thermal power plants and nuclear power plants. Status and suggestions for improvement // The power engineer 2020, 9: 19 – 26.

7. Shklyarov M. I. Development and implementation of methods to increase dynamic reliability and reduce vibration of turbine units at the stages of design, fine-tuning and operation: dissertation of the Candidate of Technical Sciences. – St. Petersburg: GPU 2007: 1 – 194.

8. Order of the Ministry of Energy dated October 4, 2022 No. 1070 on approval of the rules of technical operation of electric power plants and networks of the Russian Federation.

9. Kumenko A. I. On ways to reduce the risks of operating energy facilities // Assessment and management of industrial risks in industrial safety. Monitoring the risks of complex and unique objects: a collection of materials from the VI school seminar (August 24, 2016). – Omsk: Omskblankizdat LLC, 2016: 107 – 117.

10. Ensuring vibration reliability of turbine units of thermal power plants and nuclear power plants. The state and improvement of the regulatory framework / A. I. Kumenko, A.V. Kostyukov, S. N. Boychenko, etc. // Reliability and safety of energy 2016, 2(33): 21 – 25.


Review

For citations:


Kumenko A.I., Mironov A.M., Shklyarov M.I., Mozgunova A.I. Problems of ensuring vibration reliability of power equipment. Safety and Reliability of Power Industry. 2024;17(4):253-260. (In Russ.) https://doi.org/10.24223/1999-5555-2024-17-4-253-260

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ISSN 1999-5555 (Print)
ISSN 2542-2057 (Online)