Browsing by Author "Heras, Iker"
Now showing items 1-12 of 12
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An engineering approach for the estimation of slewing bearing stiffness in Wind Turbine Generators
The stiffness of yaw and pitch slewing bearings has a critical influence on the structural behaviour of Wind Turbine Generators. Thus, it is commonly required by designers for their simulations to estimate deformations ... -
Efficient assembly of bolted joints under external loads using numerical FEM
Coria Martínez, Ibai ; Martín Lorenzo, Iñigo ; Bouzid, Abdel-Hakim; Heras, Iker; Abasolo, Mikel (Elsevier, 2018-05-16)Several factors can cause leakages in a bolted flange connection, external loads being the most important one. External loads such as those produced by misalignment introduce an external axial load combined with a bending ... -
Four-point contact slewing bearings for wind turbines: advances in structural modelling and friction torque calculation
Heras Miguel, Iker (2018-02-23)Los rodamientos de vuelco (slewing bearings en inglés) son elementos de máquina enfocados a aplicaciones de orientación. Estos componentes se emplean en máquinas de muy diferente naturaleza, como grúas, brazos robóticos, ... -
Fórmula ingenieril para el cálculo del par de fricción en rodamientos de vuelco en vacío y bajo carga axial
Goikolea Ibarguengoitia, Eneko (2019-07-26)Entre los diversos campos de investigación en los que participa el grupo de Análisis y Diseño Mecánico (ADM) de la Escuela de Ingenieros de Bilbao, se encuentra el campo de rodamientos de vuelco. Para este tipo de rodamiento, ... -
Friction torque in four contact point slewing bearings: Effect of manufacturing errors and ring stiffness
This work outlines a procedure for the determination of the interferences between balls and raceways in four contact point slewing bearings due to manufacturing errors. The procedure is applied to a particular case and ... -
Friction torque in four-point contact slewing bearings: applicability and limitations of current analytical formulations
The friction torque is a key parameter in the design of slewing bearings. The most challenging issue in its calculation resides in the modelling of rolling element contact mechanics. In this manuscript two models for the ... -
Influence of the Geometrical Design on Ball and Crossed Roller Wire Race Bearing Behavior under Axial Load
Martín Lorenzo, Iñigo ; Heras, Iker; Aguirrebeitia, Josu ; Macareno Ramos, Luis María (Elsevier, 2020-12-05)Wire bearings are becoming popular these days in applications such as defence, robotics, medical devices or shipping industry. They provide weight and inertia reductions, good shock load and vibration absorbing capacity, ... -
Load distribution and friction torque in four-point contact slewing bearings considering manufacturing errors and ring flexibility
Heras, Iker; Aguirrebeitia, Josu ; Abasolo Bilbao, Mikel ; Coria Martínez, Ibai ; Escanciano, Iñigo (Elsevier, 2019-03-16)This work introduces a methodology for the calculation of the load distribution in four-point contact slewing bearings considering ball preload, manufacturing errors and ring flexibility. The model is built by the formulation ... -
Methodology for the assessment of equivalent load for self-lubricating radial spherical plain bearings under combined load
Aguirrebeitia, Josu ; Abasolo, Mikel ; Vallejo Matilla, Javier; Coria Martínez, Ibai ; Heras, Iker (Elsevier, 2016-09-20)... -
Parametrización de la flexibilidad de los anillos de rodamientos de vuelco de cuatro puntos de contacto
Fernández Apeztegia, Iñaki (2019-11-27)El grupo de Análisis y Diseño Mecánico (ADM) de la Escuela de Ingeniería de Bilbao (EHU/UPV) centra una línea de investigación en los rodamientos de vuelco de aerogeneradores, cuyo modelo analítico de cálculo necesitaba ... -
Static structural behaviour of wire bearings: comparison with conventional bearings and study of design and operational parameters
Martín Lorenzo, Iñigo ; Heras, Iker; Aguirrebeitia, Josu ; Abasolo Bilbao, Mikel ; Coria Martínez, Ibai (Elsevier, 2018-10-28)In wire bearings the rolling process occurs on raceways machined on steel wires, and the rings are made of light materials such as aluminium. This particular architecture provides both weight and inertia savings, but ... -
Study of the structural behaviour and analytical characterization of wire-race slewing bearings
La presente tesis doctoral tiene como objetivo presentar los últimos avances en el campo de los rodamientos de vuelco con pista de rodadura alámbrica (wire-race bearings). Debido a la escasa literatura científica disponible ...