Exploiting the complementary strengths of Orbitless and Planetary drives

Forschung im Ingenieurwesen - An Orbitless drive is a novel fixed-ratio epi-cyclic drive which includes a second carrier in place of a ring gear. This fundamental...     

Load Distribution in Meshing Process of Micro-segment Gears

Forschung im Ingenieurwesen - In this paper, a precise transverse micro-segment tooth profile is established. Subsequently, a load distribution model of micro-segment gears is...     

Consideration of elastic deformations of gear bodies using a reduction on a Fourier series

Forschung im Ingenieurwesen - Elastic deformations of a gear body lead to deformations of the flank line of a gear and have therefore an impact on the load distribution on the...     

Sensorless evaluation of the ideal timing for oil-change

Forschung im Ingenieurwesen - Customer demands for a cost-effective and demand-oriented determination of the oil change time for gears have led to the development of a new method...     

Effect of Preheating Inlet Air and Acid Gas on the Performance of Sulfur Recovery Unit—CFD Simulation and Validation

Forschung im Ingenieurwesen - Combustion temperature is a key factor that directly influences the performance of a sulfur recovery unit (SRU); the prevalent low temperatures in...     

Tribo-dynamics model of a spur gear pair with gyroscopic effect and flexible shaft

Forschung im Ingenieurwesen - This study proposes a tribo-dynamic model of a spur gear by coupling an elastic dynamic model and an isothermal elastohydrodynamic lubrication (EHL)...     

Crack detection of plastic gears using a convolutional neural network pre-learned from images of meshing vibration data with transfer learning

Forschung im Ingenieurwesen - In this paper, a crack detection method of plastic POM (Polyoxymethylene) gears using a deep convolutional neural network is proposed. The vibration...     

Comparative study of a simulative bearing design with an experimentally determined data of a prototype bearing

Forschung im Ingenieurwesen - In some specific applications, the need of an optimized rolling bearing, having a similar load carrying capacity as a tapered roller bearing but with...     

Efficiency and heat balance calculation of worm gears

Forschung im Ingenieurwesen - Worm gears enable compact gear design and high power density due to a high gear ratio within a single gear stage. However, they often show high...     

Improving design engineers’ performance through novelly structured design guidelines: a study in and with industry

Forschung im Ingenieurwesen - Engineering design guidelines are a means of sharing knowledge and information explicitly. Past work points out that the structure of a design...     

Sensor selection for cost-effective virtual torque measurements on a wind turbine gearbox

Forschung im Ingenieurwesen - Measuring the operational torques during the lifetime of a wind turbine gearbox offers a valuable source of information for design, monitoring,...     

Cavitation luminescence in a hydraulic cone throttle valve: simulation and experiments

Forschung im Ingenieurwesen - With a focus on cavitation luminescence, simulations and experiments were performed concerning cavitation within a cone throttle valve. The finite...     

Coupled vibration for a two-stage movable tooth drive system

Forschung im Ingenieurwesen - In this paper, an electromechanical coupled dynamics model of a two-stage movable tooth drive system plus a motor is proposed. The electromechanical...     

Usability of SCADA as predictive maintenance for wind turbines

Wind energy is an essential source of renewable energy. However, to compete with conventional energy sources, energy needs to be produced at low costs. An ideal situation would be to have no costly, unscheduled maintenance, preferably. Currently, O&M are half of the yearly expenses. The O&M costs are kept low by scheduled and reactive maintenance. An alternative is predictive maintenance. This method aims to act before any critical and costly repair is required. Additionally, the component is used to its full potential. However, such a strategy requires a damage indication, similar to one provided by a condition monitoring system (CMS). This paper investigates if Supervisory Control and Data Acquisition (SCADA) can be used as a damage indicator and CMS. Since 2006, every wind turbine is obliged to use such a SCADA-system. SCADA records a 10-minute average, maximum, minimum, and standard deviation of multiple technical information channels. Analytics can use those data to determine the normal behavior and a prediction model of the wind turbine. The authors investigated statistical and data mining methods to predict main bearing faults. The methods indicated a defect of up to 6 months before its maintenance.

     

Determining the load distribution by measuring the tooth root stresses

Forschung im Ingenieurwesen - A main goal in the design of modern gearboxes is to achieve an equal load distribution within the gear meshes for a certain nominal load....     

Dynamic Modeling and Analysis of a Star-wheel Reducer

Forschung im Ingenieurwesen - The star-wheel reducer has been regarded as a promising alternative solution for industrial power transmission where large transmission ratio and high power...     

Consideration of solid particles in a gear lapping simulation

Forschung im Ingenieurwesen - Gear lapping is a highly productive method of hard finishing hypoid gears for appliances with high demands regarding transmission noise. The absence of...     

Contribution of Residual Atmosphere Gases to the Flux of Collectively Accelerated Protons in a Luce Diode

Technical Physics Letters - The contribution of residual atmosphere gases to the flux of collectively accelerated protons in a Luce diode has been determined by comparing the number of...     

Alternative microstructures and their influence on mechanical properties of case-hardened gears

Forschung im Ingenieurwesen - Case hardening is one of the most common heat treatment processes for highly loaded shafts and gears. Due to numerous investigations, a microstructure...