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Design of gearbox for wind power plant
Zavadil, Roman ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The main goal of this diploma thesis is the design of a gearbox for a wind power plant. The introductory part contains a set of knowledge about wind turbine gearboxes and introduces the reader to the issue in terms of the distribution of gearboxes, gears used, recommended bearings and in terms of wind turbine generators. The design itself begins with determining the input parameters of the transmission based on a simplified aerodynamic model of the wind turbine rotor. Further, using these parameters, a device arrangement consisting of two planetary gears and one permanent gear. The entire transmission is examined in terms of kinematics, and in both planetary gears, the kinematic examination is performed using the Willis method. Then, the helical gearing is designed and its normal modulus, geometry, forces are calculated and lastly the strength calculation of the gearing is performed. Then the durability of the bearings is calculated based on a force analysis and the patented flexible pin construction is checked regarding its bending and deflection. The housing of the entire device is constructed regarding the smallest possible installation space in the control room. The final part of the work is devoted to the strength control of the bolts at the first ring gear using the finite element method and modal analysis of the entire gearbox also using the FEM.
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Design of gearbox for wind power plant
Zavadil, Roman ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The main goal of this diploma thesis is the design of a gearbox for a wind power plant. The introductory part contains a set of knowledge about wind turbine gearboxes and introduces the reader to the issue in terms of the distribution of gearboxes, gears used, recommended bearings and in terms of wind turbine generators. The design itself begins with determining the input parameters of the transmission based on a simplified aerodynamic model of the wind turbine rotor. Further, using these parameters, a device arrangement consisting of two planetary gears and one permanent gear. The entire transmission is examined in terms of kinematics, and in both planetary gears, the kinematic examination is performed using the Willis method. Then, the helical gearing is designed and its normal modulus, geometry, forces are calculated and lastly the strength calculation of the gearing is performed. Then the durability of the bearings is calculated based on a force analysis and the patented flexible pin construction is checked regarding its bending and deflection. The housing of the entire device is constructed regarding the smallest possible installation space in the control room. The final part of the work is devoted to the strength control of the bolts at the first ring gear using the finite element method and modal analysis of the entire gearbox also using the FEM.
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Dynamic model of planetary gearbox with braked satellite-gear carrier
Půst, Ladislav ; Pešek, Luděk ; Radolfová, Alena
The report is focused on theoretical-numerical analysis of influence of flexible planetary pins and of planetary gearbox connection with external driving and braking aggregates. Introducing of the compliance of planetary pins and releasing of sun wheel requires complicated differential equations of motion containing new radial coordinates and negative radial stiffness of tooth mesh. Eigen-frequencies of separated gearbox and of three-aggregates-set are ascertain for different values of torsion stiffness of external aggregates. It was shown that there exist several multi-fold eigen-frequencies.
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Dynamic model of planetary gearbox
Půst, Ladislav ; Pešek, Luděk ; Radolfová, Alena
Influence of planetary gears flexible pins on the dynamic properties of planetary gearing box is investigated. This flexibility of planets pins enable better power flow distribution in planet subsystems and increase the input torque density. Analysis of proposed simple mathematical model explains basic dynamical properties of planetary gearing with flexible pins, influence of pins’ stiffness on frequencies and on modes of free vibrations as well as on the response curves at external harmonic excitation.
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