Results 201 to 210 of about 443 (225)

CFD Simulation of Transmission for Lubrication Oil Flow Validation and Churning Loss Reduction

SAE Technical Paper Series, 2020
<div class="section abstract"><div class="htmlview paragraph">Rapidly changing emission and fuel efficiency regulations are pushing the design optimization boundaries further in the Indian car market which is already a very cost conscious. Fuel economy can be improved by reducing moving parts friction and weight optimization.</div><
Bhupinder Singh, Ved Prakash Choudhary, Arun Kumar, Chandan chopra   +3 more
openaire   +1 more source

Oil Churning Power Losses of a Gear Pair: Experiments and Model Validation

Journal of Tribology, 2009
This paper presents the results of an experimental study on load-independent (spin) power losses of spur gear pairs operating under dip-lubricated conditions. The experiments were performed over a wide range of operating speed, temperature, oil levels, and key gear design parameters to quantify their influence on spin power losses.
S. Seetharaman, A. Kahraman, M. D. Moorhead, T. T. Petry-Johnson   +3 more
openaire   +1 more source

Influence of dynamic attitudes on oil supply for bearings and churning power losses in a splash lubricated spiral bevel gearbox

Tribology International, 2021
Abstract To study the influence of dynamic flight attitudes on the splash lubrication performance and churning power losses of the intermediate spiral bevel gearbox in a helicopter, a three-dimensional (3D) simulation model consisting of a spiral bevel gear pair, two bearing caps with oil guide holes and the housing is established, and CFD ...
Xiaozhou Hu, Ao Wang, Pingping Li, Jianing Wang   +3 more
openaire   +1 more source

Optimization of Oil Quantity in Manual Transmission and Reducing Churning Loss

SAE Technical Paper Series
<div class="section abstract"><div class="htmlview paragraph">The gearbox is a crucial aggregate in a diesel truck. Gearboxes must work efficiently to get the job done properly and lubrication is vital to this efficiency. Lubricating oil is like the circulation system of a gearbox.
Sundar Lakshamanan, Dhianeshwar Ks, Santosh G R, Sarathkumar Ramaswamy   +3 more
openaire   +1 more source

Computational Fluid Dynamics Simulations and Experiments for Reduction of Oil Churning Loss and Windage Loss in Aeroengine Transmission Gears

Journal of Engineering for Gas Turbines and Power, 2014
The demand for power generation capacity has increased considerably due to the electric drive of cabin air conditioners and commercial aircraft engines. It is estimated that power losses may increase in the accessory gearbox due to generators and pumps that augment fuel consumption.
Hidenori Arisawa, Motohiko Nishimura, Hideyuki Imai, Tatsuhiko Goi   +3 more
openaire   +1 more source

Numerical modelling of oil distribution and churning gear power losses of gearboxes by smoothed particle hydrodynamics

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2018
Sufficient oil supply of all machine elements in gearboxes is usually required to avoid damage during operation. Quite frequently, transmissions are conservatively designed with an oversupply of oil to guarantee operational reliability. An oversupply of oil results in an unnecessarily high amount of oil being kept in motion, which in turn leads to ...
Hua Liu, Ghaith Arfaoui, Milos Stanic, Laurent Montigny, Thomas Jurkschat, Thomas Lohner, Karsten Stahl   +6 more
openaire   +1 more source

Modeling of oil churning power loss in spiral bevel gears under oil injection lubrication

Physics of Fluids
Spiral bevel gears are widely used in automobile transmission systems, and their performance plays a crucial role in driveline safety and transmission efficiency. However, studies on the lubrication performance and churning power loss of spiral bevel gears under an injection lubrication system are still insufficient.
Shuai Hu, Wuqi Gong, Xinda Ren
openaire   +1 more source

Development of a gearbox test rig to evaluate the impact of oil formulations on churning and friction losses

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
From large industrial to small high-speed transmission for electric vehicles, there is a growing interest in reducing the power losses on gearboxes. Hydrodynamic losses are especially relevant on high-speed gearboxes. On electric cars, the gearbox lubricant also works as a cooling fluid for the motor, which brings new challenges as performance under an
Eduardo Tomanik, Nicola Getschko, Gabriela Papoulias, Bruno Lemos, Jorge Silva   +4 more
openaire   +1 more source

A 3-D Computational Fluid Dynamics Modeling of the Churning Loss and Oil Pattern in a Single-Stage Gearbox

SAE Technical Paper Series
<div class="section abstract"><div class="htmlview paragraph">Modern gearboxes are meticulously engineered with three primary objectives: enhancing load-carrying capacity, minimizing noise, vibration, and harshness (NVH), and optimizing efficiency.
Yawei Chen, Chinmoy K. Mohapatra, Haiyang Gao   +2 more
openaire   +1 more source

Modelling and Analysis of Hypoid Gear Churning Loss in Rear Drive Axle: The Role of Oil Viscosity and Empirical Parameters

SAE Technical Paper Series
<div class="section abstract"><div class="htmlview paragraph">This definitive study investigates the variation of churning losses occurring with hypoid ring and pinion gear sets and factors that determine energy dissipation in these mechanisms.
Aliya Javid Khan, Abhinav Praveen, Pothiraj Kanagaraj, Saurabh Kumar Jain, Baaheedharan AP   +4 more
openaire   +1 more source