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1
Content available Analysis of the features of application of vibration diagnostic methods of induction motors of transportation infrastructure using mathematical modeling
Gubarevych Oleg, Gerlici Juraj, Gorobchenko Oleksandr, Kravchenko Kateryna, Zaika Denys
Diagnostyka
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2023
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Vol. 24, No. 1
art. no. 2023111
EN
In the work, studies were carried out on the use of vibration diagnostic methods for monitoring the state of induction motors with a squirrel-cage rotor, operated in electric drives of transport equipment. The most common and difficult-todiagnose damage to an induction motor is turn-to-turn short circuits in the stator winding, which require timely determination and establishment of the degree of damage to prevent an emergency shutdown of the equipment. The main purpose of the study is to establish the most effective areas of application of vibration diagnostic methods in determining the technical condition of the stator of induction motors under load. The experiments were carried out using simulation modeling for cases of turn-to-turn short circuits in one and two phases simultaneously, as well as with the influence of a low-quality supply voltage system on vibration parameters. The results of the work are relevant for further improvement of systems for diagnostic control of drives of transport equipment to increase the efficiency and reliability of their work.
2
Content available Methods for assessing the technical condition of bearing hubs in means of transport
Stanik Zbigniew, Kubik Andrzej, Hadryś Damian, Csiszár Csaba
Zeszyty Naukowe. Transport / Politechnika Śląska
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2021
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z. 113
191--204
EN
This article presents two methods of testing bearing hubs, which may supplement the existing subjective and unreliable methods of diagnostics of rolling bearings used in wheel bearing hubs of motor vehicles and other means of road transport. One of the most important elements responsible for the safety of a vehicle is the bearing hub. Regular monitoring of the technical condition of bearings should become an obligation at vehicle inspection stations when carrying out a technical inspection of a vehicle, authorising it to travel on public roads. This article presents the results of vehicle tests with signs of damage to rolling bearings, using two test stands: one on which the dynamic balancer acted as a device for accelerating the wheel, and the other, which was designed as a test dedicated to automotive rolling bearings, where a dynamic weighbridge was used as the wheel drive, made it impossible to test the wheel at lower rotational speeds. The newly designed and manufactured bearing testing device eliminates the disadvantages of the previous stand, and additionally, enables the measurement of a fully loaded bearing hub, which enables the simulation of real operating conditions on the bearing hub.
3
Content available Impact of selected operational parameters on measures of technical condition of rolling bearings in means of transport built based on analysis of vibration signals
Kubik Andrzej, Stanik Zbigniew, Hadryś Damian, Csiszár Csaba
Zeszyty Naukowe. Transport / Politechnika Śląska
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2021
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z. 111
89--98
EN
This article presents an innovative method of diagnostics of rolling bearings used in the bearing nodes of motor vehicles, with the use of a prototype specialist stand. The tests were carried out based on a developed research plan, which included the impact of damage to the bearing and tyre of the vehicle, as well as the vehicle speed. Vibration accelerations were recorded in three measurement axes. Signal spectra were created based on the time courses of the vibration signals and were further analysed. The presented method is aimed at detecting excessive wear of rolling bearings in wheels from its early period.
4
Content available Some features of the construction of autonomus diagnostic systems of wind turbine generators
Gizkho Yuri, Myslovych Mykhailo V., Zvaritch Valerij M., Ostapchuk Ludwiga B., Gutorova M.
Modern Engineering
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2021
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2
17--19
EN
The work proposes the structure of a diagnostic system, which is used to ensure the functioning of autonomous measuring transducers placed on the diagnosed parts of wind turbine generators (WT). For this purpose, the Energy Harvesting (EN) technology was used, which is designed to provide power to electronic devices in autonomous vibration measurement systems. Energy Harvesting technology converts the mechanical energy of vibrations into electrical current.
5
Content available Procedure for the evaluation of measured data in terms of vibration diagnostics by application of a multidimensional statistical model
Tomko T., Puskar M., Fabian M., Boslai R.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2016
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z. 91
125--131
EN
The evaluation process of measured data in terms of vibration diagnosis is problematic for timeline constructors. The complexity of such an evaluation is compounded by the fact that it is a process involving a large amount of disparate measurement data. One of the most effective analytical approaches when dealing with large amounts of data is to engage in a process using multidimensional statistical methods, which can provide a picture of the current status of the flexibility of the machinery. The more methods that are used, the more precise the statistical analysis of measurement data, making it possible to obtain a better picture of the current condition of the machinery.
6
Prof. Eugeniusz Kamiński (1923-1995)
Kamiński J., Pokorski J.
Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska
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2015
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z. 4/104
5--7
7
Content available The dynamic state monitoring of bearings system
Krynke M.
Production Engineering Archives
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2015
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Vol. 6, No. 1
35-38
EN
The article discusses the methods of dynamic state monitoring of bearings system. A vibration signal contains important technical information about the machine condition and is currently the most frequently used in diagnostic bearings systems. One of the main advantages of machine condition monitoring is identifying the cause of failure of the bearings and taking preventative measures, otherwise the operation of such a machine will lead to frequent replacement of the bearings. Monitoring changes in the course of the operation of machinery repair strategies allows keeping the conditioned state of dynamic failure conditioned preventive repairs and repairs after-failure time. In addition, the paper also presents the fundamental causes of bearing failure and identifies mechanisms related to the creation of any type of damage.
8
Content available remote Theoretical bases of vibration diagnostics of anchor against landslide constructions
Bouraou N., Klofa I., Zsukovskij Y., Kulish E.
Vibrations in Physical Systems
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2010
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Vol. 24
63--68
EN
The given work is devoted to development of theoretical bases of a new vibrating diagnostics method and evaluation a current condition of the anchor. The research of the pulse response of the anchor against landslide construction is a basis of vibrating diagnostics of a tension condition an anchor, detection of feature of abatement of a tightness, and definition of character of its dependence on a changing stretching force. The elastic body with the distributed parameters (a string) is used as the diagnostic model of the tense and fixed core of an anchor. Dependences of own frequencies changing of the pulse response of an anchor on a tightness changing at deformations and displacement of a place of fastening of an anchor are defined. The discrete model of an anchor against landslide construction is developed and researched for definition of dependences between parameters of an anchor condition and vibrating characteristics of a retaining wall, which is accessible to carrying out of measurements.
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