Explanipedia

Beyond starvation: Amplitude-dependent grease replenishment mechanisms in oscillating rolling bearings Open

Muyuan Liu, Sebastian Wandel, Norbert Bader, Zhengyu Lin, Gernot Bayer , et al. · 2025

Novel capacitive measuring method to determine the complex impedance behavior of machine elements Open

Volker Schneider, Josephine Kelley, Bela Lehnhardt, Marius Krewer, Norbert Bader , et al. · 2025

Experimental investigation of the influence of surface structures on hydrodynamic fluid film thickness and contact temperatures in sliding contacts Open

Dilek Bulut, Norbert Bader · 2025

Novel Capacitive Measuring Method to Determine the Complex Impedance Behavior of Machine Elements Open

Volker Schneider, Josephine Kelley, Bela Lehnhardt, Marius Krewer, Norbert Bader , et al. · 2025

Influence of the meniscus on wear in grease-lubricated oscillating rolling contacts Open

Gernot Bayer, Sebastian Wandel, Ashkan Ayromlou, Norbert Bader, Gerhard Poll · 2024

Grease-lubricated rolling element bearings that perform oscillating motion are often prone to False Brinelling. Previous investigations on oscillating open contacts, i.e. no presence of a sticking zone, identified the replenishment of the …

Eﬀect of Thermal Aging on the Grease ﬁlm Thickness in Ball Bearings Open

Hui Cen, Nicola De Laurentis, Norbert Bader, Piet M. Lugt · 2024

Thermal Imaging and Numerical Lubrication Analysis of Local Temperatures in Structured Peek Face Seals Considering Variable Cavitation Pressure and Viscosity Open

Dilek Bulut, Norbert Bader · 2024

Effect of Thermal Aging on the Grease Film Thickness in Ball Bearings Open

Hui Cen, Nicola De Laurentis, Norbert Bader, Piet M. Lugt · 2024

Wear Development in Oscillating Rolling Element Bearings Open

Sebastian Wandel, Arne Bartschat, Jakob Glodowski, Norbert Bader, Gerhard Poll · 2023

Rotor blade bearings enable rotor blades to pivot about their longitudinal axis and thus control the power output and reduce the loads acting on the wind turbine. Over a design period of 20 years, rolling bearings are exposed to frequent o…

Wear Development in Oscillating Rolling Element Bearings Open

Sebastian Wandel, Arne Bartschat, Jakob Glodowski, Norbert Bader, Gerhard Poll · 2023

Rotor blade bearings enable the rotor blades to pivot about their longitudinal axis and thus control the power output and reduce the loads acting on the wind turbine. Over a design period of 20 years, rolling bearings are exposed to freque…

Starvation and Re-lubrication in Oscillating Bearings: Influence of Grease Parameters Open

Sebastian Wandel, Norbert Bader, Jakob Glodowski, Bela Lehnhardt, Johan Leckner , et al. · 2022

A common application for grease-lubricated oscillating rolling element bearings is, e.g., rotor blade bearings in wind turbines. These bearings mainly operate under conditions that are prone to starvation. If the grease is unable to provid…

Starvation and Relubrication in Oscillating Bearings - Influence of Grease Parameters Open

Sebastian Wandel, Norbert Bader, Johan Leckner, Bela Lehnhardt, Jakob Glodowski , et al. · 2022

A common application for grease-lubricated oscillating rolling element bearings are, e.g., rotor blade bearings in wind turbines. These bearings mainly operate under low-velocity conditions leading to starvation. If the grease is unable to…

Empirical formulae for the influence of real film thickness distribution on the capacitance of an EHL point contact and application to rolling bearings Open

Volker Schneider, Haichao Liu, Norbert Bader, Alexander Furtmann, Gerhard Poll · 2020

Scale and contact geometry effects on friction in thermal EHL: twin-disc versus ball-on-disc Open

Haichao Liu, B.B. Zhang, Norbert Bader, C.H. Venner, Gerhard Poll · 2020

A study of grease lubricants under wind turbine pitch bearing conditions Open

Fabian Schwack, Norbert Bader, Johan Leckner, Claire Demaille, Gerhard Poll · 2020

Simplified traction prediction for highly loaded rolling/sliding EHL contacts Open

Haichao Liu, B.B. Zhang, Norbert Bader, Cornelis H. Venner, Gerhard Poll · 2020

Influences of solid and lubricant thermal conductivity on traction in an EHL circular contact Open

Haichao Liu, B.B. Zhang, Norbert Bader, Gerhard Poll, Cornelis H. Venner · 2019

Friction torque of wind-turbine pitch bearings – comparison of experimental results with available models Open

Matthias Stammler, Fabian Schwack, Norbert Bader, Andreas Reuter, Gerhard Poll · 2018

Pitch bearings of wind turbines are large, grease-lubricated rolling bearings that connect the rotor blades with the rotor hub. They are used to turn the rotor blades to control the power output and/or structural loads of the turbine. Comm…

Traction in EHL-Contacts : the influence of local fluid rheology and temperatures Open

Norbert Bader · 2018

The traction in concentrated contacts is governed by the fluid rheology. While the film formation has been well understood and its relation to the physical lubricant properties have been shown, the rheology governing the lubricant behaviou…

Friction torque of wind-turbine pitch bearings – comparison of experimental results with available models Open

Matthias Stammler, Fabian Schwack, Norbert Bader, Andreas Reuter, Gerhard Poll · 2017

Pitch bearings of wind turbines are large, grease-lubricated rolling bearings that connect the rotor blades with the rotor hub. They are used to turn the rotor blades to control the power output and/or structural loads of the turbine. Comm…

Examination of friction and wear of a 100Cr6 ball against a bearing ring in a micro-pin-on-disk tester Open

Norbert Bader, Florian Pape, Hans H. Gatzen, Gerhard Poll · 2015

Understanding the wear and friction phenomena in bearings is of key importance for the reduction of friction and wear.Boundary layers formed by oil additives during operation may significantly influence the frictional behaviour.To investig…

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