Zusammenfassung
Foreword
Gears bear great responsibility in present times, where the conditions for mechanical engineering and especially for drive technology are changing faster than ever. Megatrends, such as circular economy, decarbonization, green pressure, digitalization, zero waste and several more represent global challenges - but at the same time they are unforeseen opportunities for drives in industry, energy generation and mobility. Gear engineers must find answers to these research questions and provide solutions.
Topics like gear efficiency improvements, performance enhancement of plastic gears, new measurement methods and additive manufacturing are in the focus of the VDI International Conference on Gears 2022 in Garching / Munich. One interesting question is, if we can anticipate break-through innovations to address the challenges above. The opening session of the conference addresses this very question: “What will be the next game-changing innovations and technologies in gear design and production?”.
In the main part of the conference within 40 specialized sessions the latest developments and research results in powertrain industry and academic research are presented and discu...
Schlagworte
Roller pairing gear root bending gear test gear mesh excitation grinding zone angular speed helical gears smart gear system downsizing automotive tranmission thread linking bevel and hypoid waer gear geometry optimization FEM analysis- Kapitel Ausklappen | EinklappenSeiten
- 1–2 Foreword 1–2
- 3–14 Keynotes 3–14
- 75–118 NVH 75–118
- 119–156 EHL contact 119–156
- 265–304 Gear strength 265–304
- 305–342 Wear 305–342
- 343–388 Bevel and hypoid gears 343–388
- 389–432 Planetary gears 389–432
- 469–510 Enhanced testing methods 469–510
- 511–532 Gear dynamics 511–532
- 573–608 FEM analysis 573–608
- 715–762 Friction 715–762
- 903–926 High speed gears 903–926
- 927–1018 Poster Exhibition 927–1018
- 1019–1060 Applications 1019–1060
- 1061–1098 Material properties 1061–1098
- 1099–1148 Gear strength testing 1099–1148
- 1181–1208 Geometry effects 1181–1208
- 1249–1268 Lubrication 1249–1268
- 1269–1304 Tribological investigation 1269–1304
- 1383–1410 Gear soft machining 1383–1410
- 1447–1488 Advances in special gearings 1447–1488
- 1489–1528 Modeling in gear production 1489–1528
- 1529–1568 Measurement technology 1529–1568
- 1569–1582 Gear hard machining 1569–1582
13 Treffer gefunden
- „... Computational Fluid Dynamics (CFD) simulations of the oil flow in gearboxes, essential information can be ...” „... of the gearbox fluid flow with the guide plate was assumed to be causal. Otto [37] analyzed the ...” „... study aims at extending the understanding of guided multiphase fluid flow in gearboxes and highlights ...”
- „... continuity equation can be derived according to the fact that the net mass flowrate out of the fluid element ...” „... Volume force vector of the fluid and solid (N/m3) Velocity strain tensor (1/s), ( ) / 2TV V Fr Froude ...” „... (μm)N Viscosity of Newtonian fluid (Pa s)cenh VCentral film thickness in the constant VPC condition (μm ...”
- „... the fact that the fluid flow within gearboxes is inherently complex. This is caused by the complexly ...” „... gear-scaling obsolete. Although overall fluid flow was reproduced accurately [19], [20], [21], [22] this method ...” „... interlocking region resulted in a load-dependent and -independent loss increase. Computational fluid dynamics ...”
- „... the fluid flow is aspired and then ejected by the tooth. When one flange is present at the suction ...” „... side (especially when the clearance remains lower than 5 mm) the possibility to aspire a fluid flow is ...” „... surrounding fluid is supposed to be pure air, the physical properties are evaluated at 25 °C (e.g. ρ = 1.185 ...”
- „... VDI-Berichte Nr. 2389, 2022 609usually fully or partly abrasive – and process fluid e.g. water and compounds to ...” „... immersion can also by adapted to adjust the process flow for different workpiece geometries. The rotation of ...” „... , an excellent process media flow could be generated. 1 Media in container 2 Workpiece holder 3 ...”
- „... addition to the manufacturing of force-flow-optimised lightweight structures, e.g., those used in ...” „... possible. The next key function defines the flow principle: to connect several teeth, a serial or a ...” „... parallel flow can be chosen. These two forms of flow are fundamentally different and have specific ...”
- „... elastohydrodynamic fluid friction at high speeds. The investigations show that the coefficient of friction behavior ...” „... transmission through the fluid. The coefficient of friction is a property that is dominated by the type of base ...” „... oil and the type of VI improver in the area of mixed and fluid friction, especially with additional ...”
- „... plastic material model component, flow curves are specified as a function of temperature. In the case of ...” „... height of the lubrication gap in the tooth contact and the shear stresses responsible for the fluid ...” „... friction mechanism is thus divided into boundary and fluid friction. The division is carried out by means ...”
- „... turning speeds of the specimens. The reduction of the fluid friction ratio in the first part of the ...” „... much as the wire-eroded surface. In the region of boundary friction as well as in the region with fluid ...” „... , where the machine-hammer-peened variant a070 showed the best friction coefficient in the region of fluid ...”
- „... design is chosen. This can provide adequate stiffness and damping at a much lower oil flow rate compared ...” „... oil flow back into the housing, thus enabling a closed lubricant circuit. Due to special requirements ...” „... high flow rates, contactless centrifugal seals are used. These are, in contrast to contacting seals ...”
- „... described in Fig. 3using a simplified flow chart.Fig. 3: Simplified calculation process of the gear ...” „... is divided into boundary friction and fluid friction by means of a factor - the solid body contact ...” „... division of the total friction into boundary and fluid friction is performed. With the locally acting line ...”
- „... VDI-Berichte Nr. 2389, 2022 905by an inner housing. By measuring the oil volume flow, the oil injection ...” „... ] Facewidth T [Nm] Torque cp [∙] Specific heat capacity V [l/min] Oil volume flow da [mm] Tip circle ...” „... ] Hertzian stress εα [-] Transverse contact ratio tK [s] Local contact time λ [-] Specific fluid film ...”
- „... , the most common defects are gas porosity, shrinkage holes, hot cracking, flow marks, misruns, and cold ...” „... enable AM without supporting material and with a good flow, in order to remove the powder after printing ...” „... temperature nor the fluids were taken into account. The FEM model was made with the casting die as the ...”