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Analysis of vibratory roller with new type of steering kinematics
Votroubek, Jan ; Rada, Zdeněk (referee) ; Škopán, Miroslav (advisor)
Diploma thesis includes design of bearings of steering joints of tandem vibratory pivot-steering roller Ammann AV 95-2, design of bearings of steering joints of tandem vibratory with new type of steering kinematics and calculation and comparison of contact pressures between drum and soil for different angles of turn of front and rear drum for different types of tandem vibratory rollers. Comparison of contact pressures is realised for pivot steering roller AV 95-2, articulated tandem roller AV 80 X, articulated tandem roller with modified configuration of steering-joints and tandem roller with new type of steering kinematics.
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Design of the hydraulic circuit of the ASC 110 vibratory roller drive
Novák, Martin ; Rada, Zdeněk (referee) ; Rada, Zdeněk (referee) ; Klas, Roman (advisor)
This thesis presents a proposal of newly designed concept for travel hydraulic circuit of vibratory single drum roller ASC 110. The maximum machine gradeability was chosen as the main parameter for hydraulic circuit proposal. After selecting the new hydraulic travel concept, suitable hydraulic components have been selected. Length and local losses for two different machine speeds were calculated for sufficient hydraulic circuit design. Hydraulic losses have also been calculated for use in different climatic conditions. A new machine cooling concept has also been proposed. Heating and cooling curves of hydraulic circuit were calculated. For the purpose of comparing gradeability and energy balance of the newly designed travel concept compared to the existing one currently in mass production, both machines were fitted with measuring points. On both machines were measured for example, pressure, flow and temperature in each hydraulic circuit branch and others. From the time dependencies of the above-mentioned parameters it was possible to determine the energy efficiency of the newly designed concept. To assess the maximum gradeability, the slope of the hill was measured. Comparing the two machines, it has been found that the two hydraulic circuit solution has significantly improved traction properties in demanding machine applications, especially when driving uphill and downhill. This concept also affects less fuel consumption and places less demand on the hydraulic oil cooler due to its energy efficiency.
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Double drum synchronized control of hydraulic vibratory roller ARP95
Novák, Martin ; Rada, Zdeněk (referee) ; Klas, Roman (advisor)
This thesis presents solution of synchronized two smooth drum steering of tandem vibratory roller ARP 95. During the development of this machine was found insufficient synchronization of two drums. The above-described problem was solved by modifying the steering block. The correct evaluation of data measurement and understanding of the machine behaviour led to elimination of the problem. The main result of this thesis is elimination of unsynchronized behavior of two drums. Thanks to this was achieved maximum deviation between two drums 0,2°. Synchronized steering is very important for modifying the surface of the asphalt roads around the sidewalks and currently the machine ARP 95 produced by AMMANN is the top of the market when it comes to the synchronized steering.
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Design of the hydraulic circuit of the ASC 110 vibratory roller drive
Novák, Martin ; Rada, Zdeněk (referee) ; Rada, Zdeněk (referee) ; Klas, Roman (advisor)
This thesis presents a proposal of newly designed concept for travel hydraulic circuit of vibratory single drum roller ASC 110. The maximum machine gradeability was chosen as the main parameter for hydraulic circuit proposal. After selecting the new hydraulic travel concept, suitable hydraulic components have been selected. Length and local losses for two different machine speeds were calculated for sufficient hydraulic circuit design. Hydraulic losses have also been calculated for use in different climatic conditions. A new machine cooling concept has also been proposed. Heating and cooling curves of hydraulic circuit were calculated. For the purpose of comparing gradeability and energy balance of the newly designed travel concept compared to the existing one currently in mass production, both machines were fitted with measuring points. On both machines were measured for example, pressure, flow and temperature in each hydraulic circuit branch and others. From the time dependencies of the above-mentioned parameters it was possible to determine the energy efficiency of the newly designed concept. To assess the maximum gradeability, the slope of the hill was measured. Comparing the two machines, it has been found that the two hydraulic circuit solution has significantly improved traction properties in demanding machine applications, especially when driving uphill and downhill. This concept also affects less fuel consumption and places less demand on the hydraulic oil cooler due to its energy efficiency.
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Double drum synchronized control of hydraulic vibratory roller ARP95
Novák, Martin ; Rada, Zdeněk (referee) ; Klas, Roman (advisor)
This thesis presents solution of synchronized two smooth drum steering of tandem vibratory roller ARP 95. During the development of this machine was found insufficient synchronization of two drums. The above-described problem was solved by modifying the steering block. The correct evaluation of data measurement and understanding of the machine behaviour led to elimination of the problem. The main result of this thesis is elimination of unsynchronized behavior of two drums. Thanks to this was achieved maximum deviation between two drums 0,2°. Synchronized steering is very important for modifying the surface of the asphalt roads around the sidewalks and currently the machine ARP 95 produced by AMMANN is the top of the market when it comes to the synchronized steering.
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Analysis of vibratory roller with new type of steering kinematics
Votroubek, Jan ; Rada, Zdeněk (referee) ; Škopán, Miroslav (advisor)
Diploma thesis includes design of bearings of steering joints of tandem vibratory pivot-steering roller Ammann AV 95-2, design of bearings of steering joints of tandem vibratory with new type of steering kinematics and calculation and comparison of contact pressures between drum and soil for different angles of turn of front and rear drum for different types of tandem vibratory rollers. Comparison of contact pressures is realised for pivot steering roller AV 95-2, articulated tandem roller AV 80 X, articulated tandem roller with modified configuration of steering-joints and tandem roller with new type of steering kinematics.
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