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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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Machine diagnostics based on models
Kapusta, Juraj ; Habán, Vladimír (referee) ; Huzlík, Rostislav (advisor)
The main idea is focused on the diagnostics of a specific hydraulic system, i.e. sensing the physical quantities of the hydraulic circuit with a tank and a centrifugal pump driven by an asynchronous motor. It is a system of pipes connected to the pump, where due to its work it creates a water flow and a pressure increase. In practice, this issue is also addressed in the energy and nuclear industries. Primary circuits in some cases cannot be designed or modified to be able measure locally the pressure value. It is necessary to measure this quantity indirectly - from the motor currents. The main idea of the work is to diagnose the system by an indirect method - specifically to detect the state of the hydraulic circuit (pressure, flow) from the values that we are able to measure and detect damage in advance. In the second part of the thesis is the application of the parts of a specific hydraulic system in the simulation environment MATLAB Simulink. The model of the hydraulic circuit contains mathematical-physical relations that simulate the course of the mentioned experiment. The results of the simulation are compared with the results of the experiment. The model also investigates the simulation of a fault condition, when we supply pressure pulsations to the hydraulic circuit. It is these changes in the hydraulic part that affect the characteristics of the pump and the asynchronous motor, so we are able to diagnose this system.
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Machine diagnostics based on models
Kapusta, Juraj ; Habán, Vladimír (referee) ; Huzlík, Rostislav (advisor)
The main idea is focused on the diagnostics of a specific hydraulic system, i.e. sensing the physical quantities of the hydraulic circuit with a tank and a centrifugal pump driven by an asynchronous motor. It is a system of pipes connected to the pump, where due to its work it creates a water flow and a pressure increase. In practice, this issue is also addressed in the energy and nuclear industries. Primary circuits in some cases cannot be designed or modified to be able measure locally the pressure value. It is necessary to measure this quantity indirectly - from the motor currents. The main idea of the work is to diagnose the system by an indirect method - specifically to detect the state of the hydraulic circuit (pressure, flow) from the values that we are able to measure and detect damage in advance. In the second part of the thesis is the application of the parts of a specific hydraulic system in the simulation environment MATLAB Simulink. The model of the hydraulic circuit contains mathematical-physical relations that simulate the course of the mentioned experiment. The results of the simulation are compared with the results of the experiment. The model also investigates the simulation of a fault condition, when we supply pressure pulsations to the hydraulic circuit. It is these changes in the hydraulic part that affect the characteristics of the pump and the asynchronous motor, so we are able to diagnose this system.
|
|
|
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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