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Types of rolling bearings wear
Kapusta, Juraj ; Košťál, David (referee) ; Zapletal, Tomáš (advisor)
The aim of this bachelor thesis is to classify the rolling bearing wear from the very origin, the course in the operating state and the resulting quality of the component until the complete elimination. The design and subsequent production guarantee the life of the part, when the required working hours work safely. The designer's role in designing a bearing selection for a given bearing, lubrication and load transfer is to take into account all factors that could lead to damage. In practice, the customer's choice of bearing is recommended according to various computational methods that ensure optimal selection of a standardized bearing from the catalog. The individual parts contain values specifying the strength and dynamic properties that the customer can handle. The result will be a survey of several real companies, analysis of their implementation and accessibility of modules to facilitate the selection of the correct bearing. To do this, I try to make the issue of wear and tear accessible, which is related to the prevention of these undesirable effects.
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Comparison of methods for identification of rolling bearing failures
Kokeš, Miroslav ; Hnidka,, Jakub (referee) ; Klusáček, Stanislav (advisor)
The aim of this master thesis is the comparison of selected methods and parameters for roller bearings diagnostics. Selected statistical parameters are kurtosis, crest factor, and parameter K(t). The other selected methods are envelope analysis, cepstral analysis, and ACEP method. These methods are implemented in LabVIEW software and compared based on noise resistance, computation speed, and overall capability of identifying roller bearing faults.
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Influence of interference fit on Rolling Bearing life
Tetour, Stanislav ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
Master thesis is focused on the influence of interference fit on rolling bearing life. The first part of thesis deals with the theoretical knowledge, that is necessary for the solution. The influence of interference fit was investigated of inner ring on shaft and outer ring in housing bore for recommended tolerance classes. Interference fit was solved on cylindrical roller bearing and tapered roller bearing. Analytical and numerical approach was used for the solution. A static analysis of bearing was made using program ANSYS Workbench in numerical section. The output of analysis was maximum shear stress under the contact surface, which result is contact fatigue of bearing. Bearing life was determined by life factor, which indicates bearing life with interference fit compared to bearing without interference fit.
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NVH Analysis of Transmissions
Gazda, Silvester ; Zubík, Martin (referee) ; Prokop, Aleš (advisor)
This bachelor's thesis deals with the design of measuring noise and vibration of vehicle transmissions. First describes the main parts of the transmission. This is followed by a description of sources of vibration and noise, and their travel. Significant work is devoted to analysis of the frequency spectrum, of its creation and evaluation. It also includes a description of the measurement and the necessary equipment, along with a description of the basic principles of its functioning.
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Design of the computational lifetime prediction methodology for the roll bearing
Vaculka, Miroslav ; Vlk, Miloš (referee) ; Vrbka, Jan (advisor)
This master’s thesis deals with a fatigue analysis of a roller bearing. The fatigue analysis consists of determining service-life of a roller bearing using a stress-strain analysis with finite element method and subsequent numeric calculation using software fe-safe with application of Brown-Miller multiaxial fatigue criterion. Service-life of a roller bearing is determined by number of cycles to failure in the form of pitting formation which is consequence of contact fatigue. According to calculations was found an inappropriateness of Brown-Miller criterion for high-cycle contact fatigue. Test of other available criteria was performed. Principal-Strain criterion provided the best match with ISO 281 standard.
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Condition-based Lubrication System
Kroliczek, Václav ; Nohál, Libor (referee) ; Svoboda, Petr (advisor)
This work provides a review of actual information about condition-based lubrication systems for roller bearings to make longer their durability. The first part describes current types of bearings, their lubrication and adequate lubricants. The second part deals with condition-based lubrication systems.
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Rolling bearing stiffness
Krišpín, Jakub ; Kvarda, Daniel (referee) ; Košťál, David (advisor)
Given bachelor thesis deals with stiffness of model shaft configuration which is mounted overhung in two single row radial ball bearings. Initial part of the thesis is focused on roller bearings and parameters affecting their stiffness. Then a model assembly is designed. The stiffness calculation calculation of the assembly is performed by MESYS software. Subsequently, an experimental stiffness measurement is performed. Stiffness is determined by measuring the deformation of the shaft at given load. Values are compared with each other and the sensitive points in the calculation are determined. The results of the thesis mainly lead to determination of the magnitude of the influence of individual parameters on the change in stiffness. The functionality of the MESYS software was verified.
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Design of cutter head with Harmonic-Drive application
Tkadlec, Dušan ; Dosedla, Michal (referee) ; Holub, Michal (advisor)
This master´s work deal with design two axis cutter head with possible variants drive of axis. The part of this work is also technical– economics valuation of single variants, calculation torque and force from motor head and design taking head in two axis. Cutter head should be applicated to boring and cutting headstock given to type with posibility of adaptive exchenges spindle.
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Rolling bearing stiffness
Krišpín, Jakub ; Kvarda, Daniel (referee) ; Košťál, David (advisor)
Given bachelor thesis deals with stiffness of model shaft configuration which is mounted overhung in two single row radial ball bearings. Initial part of the thesis is focused on roller bearings and parameters affecting their stiffness. Then a model assembly is designed. The stiffness calculation calculation of the assembly is performed by MESYS software. Subsequently, an experimental stiffness measurement is performed. Stiffness is determined by measuring the deformation of the shaft at given load. Values are compared with each other and the sensitive points in the calculation are determined. The results of the thesis mainly lead to determination of the magnitude of the influence of individual parameters on the change in stiffness. The functionality of the MESYS software was verified.
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Comparison of methods for identification of rolling bearing failures
Kokeš, Miroslav ; Hnidka,, Jakub (referee) ; Klusáček, Stanislav (advisor)
The aim of this master thesis is the comparison of selected methods and parameters for roller bearings diagnostics. Selected statistical parameters are kurtosis, crest factor, and parameter K(t). The other selected methods are envelope analysis, cepstral analysis, and ACEP method. These methods are implemented in LabVIEW software and compared based on noise resistance, computation speed, and overall capability of identifying roller bearing faults.
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