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Check valve
Nehybová, Petra ; Závorka, Dalibor (referee) ; Klas, Roman (advisor)
In this Master thesis are mentioned the most used constructions of non-return valves. Further consist of operation principles, fields of application, properties and diffi-culties connected to non-return valves. Motion plug of check valve in liquid is described based on CFD Software simulation.
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Measurement of dynamic characteristic of check valves
Novák, Jan ; Himr, Daniel (referee) ; Habán, Vladimír (advisor)
Master thesis presents overview of existing types of check valves, their features, uses and issue called "cracking". Experimental part of this thesis focuses on the lift and swing check valves. Results of the measurement are evaluated from non-stationary flow point of view by developing and analyzing static and dynamic characteristics. This thesis takes into account losses and dynamic effects as main viewpoints. Two methods for measuring non-stationary velocities are used. Direct method called Gibson and indirect method laser doppler anemometry. Goal of the master thesis is to increase understanding of the check valves and their applicability.
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Determination of the working range and efficiency of the water hammer pump
Růžička, Jakub ; Himr,, Daniel (referee) ; Špano, Miroslav (advisor)
This thesis focuses on setting the range and efficiency of a water ram pump through experimental measurements in a laboratory. The measurements were carried out on three different constructions of water ram pump, each of the designed and assembled by the author of this thesis himself, to find out whether the weight on the pulsating valve has an influence on the water ram pump efficiency. Further on this thesis aims at the comparison of up to now methods of water transport arrangement used at a summer camp and the usage of the water ram pump and its advantages. The principal of water ram pump originates in hydraulic impact that is being precisely described in a great detail as well. On of the chapters even includes the placement manual for the water ram pump and its overall assembly and connexion. Because the presence of floating debris is inevitable, this thesis also deals with the possibility to solve the incoming water impurities by adding an inflow gating to prevent such problem. This inflow gating has only been designed in a Flow 3D programme to introduce the idea and functions.
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Design of low-pressure magnetorheological damper
Mareš, Jan ; Žáček, Jiří (referee) ; Kubík, Michal (advisor)
This bachelor thesis deals with the problem of the limited lifetime of sealing elements inside high-pressure magnetorheological dampers. The lifetime could be extended by the low-pressure damper design, which is also the aim of this thesis. The proposed design achieves low-pressure operation thanks to the MR foot valve inserted between the damping piston and floating piston of the air chamber. This foot valve also contains a blow-off check valve. For simplicity and to reduce the upfront costs of the testing prototype, the damper was designed by modifying an existing single-tube high-pressure MR damper available at FSI VUT. The contribution of this thesis is the experimental evaluation of check valve function in MR fluid. Valve exhibits asymmetrical behaviour and closes rapidly. The main outcome is the design of a low-pressure single-tube MR damper. It is expected that operation at lower pressures will extend the lifetime of sealing elements which may lead to broader implementation of MR dampers.
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Heating of the guesthouse
Diatel, Jakub ; Topič, Jan (referee) ; Počinková, Marcela (advisor)
The theoretical part of this thesis is based on ideal design of solar systems and determine physical properties of antifreezing mix based on glycol in different concentration by Swiss mathematical model. In practical part is solved heating of the guesthouse by pellets. Heating of the hot domestic water was designed by solar collectors. Forced ventilation was designed with heat recovery.
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Water supply of scout camp by hydraulic ram
Růžička, Jakub ; Duchan, David (referee) ; Špano, Miroslav (advisor)
This work is dealing with water supply of a scout camp from Trusovický potok. The water is pumped with a ram pump to the water tank. The construction of the ram pump is simplified and it is collected from commonly available fittings and fixtures. The water from the tank is distributed by pipe network gravitationaly. Operating charakteristics of the hydraulic ram pump were measured in the laboratory.
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Design of low-pressure magnetorheological damper
Mareš, Jan ; Žáček, Jiří (referee) ; Kubík, Michal (advisor)
This bachelor thesis deals with the problem of the limited lifetime of sealing elements inside high-pressure magnetorheological dampers. The lifetime could be extended by the low-pressure damper design, which is also the aim of this thesis. The proposed design achieves low-pressure operation thanks to the MR foot valve inserted between the damping piston and floating piston of the air chamber. This foot valve also contains a blow-off check valve. For simplicity and to reduce the upfront costs of the testing prototype, the damper was designed by modifying an existing single-tube high-pressure MR damper available at FSI VUT. The contribution of this thesis is the experimental evaluation of check valve function in MR fluid. Valve exhibits asymmetrical behaviour and closes rapidly. The main outcome is the design of a low-pressure single-tube MR damper. It is expected that operation at lower pressures will extend the lifetime of sealing elements which may lead to broader implementation of MR dampers.
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Check valve
Nehybová, Petra ; Závorka, Dalibor (referee) ; Klas, Roman (advisor)
In this Master thesis are mentioned the most used constructions of non-return valves. Further consist of operation principles, fields of application, properties and diffi-culties connected to non-return valves. Motion plug of check valve in liquid is described based on CFD Software simulation.
|
|
|
Determination of the working range and efficiency of the water hammer pump
Růžička, Jakub ; Himr,, Daniel (referee) ; Špano, Miroslav (advisor)
This thesis focuses on setting the range and efficiency of a water ram pump through experimental measurements in a laboratory. The measurements were carried out on three different constructions of water ram pump, each of the designed and assembled by the author of this thesis himself, to find out whether the weight on the pulsating valve has an influence on the water ram pump efficiency. Further on this thesis aims at the comparison of up to now methods of water transport arrangement used at a summer camp and the usage of the water ram pump and its advantages. The principal of water ram pump originates in hydraulic impact that is being precisely described in a great detail as well. On of the chapters even includes the placement manual for the water ram pump and its overall assembly and connexion. Because the presence of floating debris is inevitable, this thesis also deals with the possibility to solve the incoming water impurities by adding an inflow gating to prevent such problem. This inflow gating has only been designed in a Flow 3D programme to introduce the idea and functions.
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