Effect of Lubricating Oil on Sliding Loss and Power Loss of Nylon Gear

2019 ◽  
pp. 596-602
Author(s):  
Mohammad Asaduzzaman Chowdhury ◽  
Md. Azizul Islam ◽  
Dewan Muhammad Nuruzzaman ◽  
Bengir Ahmed Shuvo ◽  
Rajib Nandee ◽  
...  
Keyword(s):  
Power Loss ◽  
Lubricating Oil

Windage Power Losses From Spiral Bevel Gears With Varying Oil Flows and Shroud Configurations

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Graham Johnson ◽  
Budi Chandra ◽  
Colin Foord ◽  
Kathy Simmons
Keyword(s):  
Power Loss ◽  
High Speed ◽  
Bevel Gear ◽  
Lubricating Oil ◽  
Video Observation ◽  
Bevel Gears ◽  
Pinion Gear ◽  
Oil Flow ◽  
Spiral Bevel ◽  
Aero Engines

In many aero-engines, the power to drive accessories is transmitted through high speed bevel gears in a chamber in the center of the engine. The windage power loss (WPL) associated with these gears makes a significant contribution to the overall heat generation within the chamber. Shrouding the gears provides an effective method of reducing this WPL and managing the flow of lubricating oil. Experimental and computational programs at the University of Nottingham Technology Centre in Gas Turbine Transmission Systems are providing an improved understanding of shroud performance and design. This paper presents the results from a pair of shrouded meshing gears run at representative speeds and oil flow in a rig with speed and torque measurement. A previously published study of a single bevel gear operating in air (Johnson et al., 2007, “Experimental Investigation Into Windage Power Loss From a Shrouded Spiral Bevel Gear” ASME Paper No. GT2007-27885) found a reduction in torque of up to 70% from shrouding. In this work, the addition of oil and the pinion gear did not lead to high torque due to the buildup of oil under the shrouds, but the reduction in torque due to fitting the shrouds is significantly less than was found for the same gear in air alone. In order to isolate the various parameters, further testing with a single gear was carried out. A fully (360 deg) shrouded gear shows a big improvement over an unshrouded gear when running in air alone, but much of this benefit disappears as soon as a very small amount of oil is introduced under the shroud. This implies that the oil is recirculating under the shroud. Increasing the oil flow beyond this initial level increases the torque by the amount required to accelerate the oil mass flow up to the peripheral speed of the gear. Providing a full width slot in the shroud downstream of the oil jet allows the oil to escape without any recirculation and restores much of the benefit of the shroud. Further insight into the oil behavior is obtained from torque measurements and observations through a transparent shroud and with various slot configurations. Video observation shows evidence of a vortex flow under the shroud that carries some of the oil toward the inner diameter of the gear. The three main windage contributors, air alone, recirculation of oil under the shroud, and acceleration of the feed oil, are quantified and methods for achieving the optimum design are discussed.

System-in-Packages with Low Power Loss for Future Voltage Regulators

2010 ◽  
Vol 130 (9) ◽  
pp. 1630-1635
Author(s):  
Takayuki Hashimoto ◽  
Tetsuya Kawashima ◽  
Masaki Shiraishi ◽  
Noboru Akiyama ◽  
Tomoaki Uno ◽  
...  
Keyword(s):  
Low Power ◽  
Power Loss ◽  
Voltage Regulators

A Novel Power Loss Calculation Method for Power Magnetic Components in Power Converters

2021 ◽  
Vol 141 (1) ◽  
pp. 69-75
Author(s):  
Yuki Ishikura ◽  
Tatsuya Hosotani ◽  
Masayoshi Yamamoto
Keyword(s):  
Calculation Method ◽  
Power Loss ◽  
Power Converters ◽  
Loss Calculation ◽  
Magnetic Components

Operation of Voltage Reactive Power Control Devices based on Cooperation between Two-Voltage Class Transmission Network with PV Systems to Reduce Power Loss

2020 ◽  
Vol 140 (6) ◽  
pp. 484-494
Author(s):  
Akihisa Kaneko ◽  
Shinya Yoshizawa ◽  
Yasuhiro Hayashi ◽  
Shuhei Sugimura ◽  
Yoshinobu Ueda ◽  
...  
Keyword(s):  
Power Control ◽  
Power Loss ◽  
Reactive Power ◽  
Transmission Network ◽  
Reactive Power Control ◽  
Pv Systems ◽  
Control Devices

Study on Power Fluctuation Dispatch and Capacity Design of Short Period Power Fluctuation Compensation System in Consideration of Power Loss

2014 ◽  
Vol 134 (1) ◽  
pp. 57-63
Author(s):  
Akihiro Teguri ◽  
Shunsuke Kawachi ◽  
Jumpei Baba ◽  
Eisuke Shimoda ◽  
Takayuki Sugimoto
Keyword(s):  
Power Loss ◽  
Compensation System ◽  
Capacity Design ◽  
Power Fluctuation ◽  
Short Period

Correction: Cryogenic Characterization and Modeling of Silicon Superjunction MOSFET for Power Loss Estimation

2020 ◽  
Author(s):  
Md Maksudul Hossain ◽  
Arman Ur Rashid ◽  
Rosten Sweeting ◽  
Yuqi Wei ◽  
Haider Mhiesan ◽  
...  
Keyword(s):  
Power Loss ◽  
Loss Estimation

EXPERIMENTAL ANALYSIS OF THE INFLUENCE OF LUBRICATING OIL AND FUEL ON THE VIBRATION LEVEL OF CRANKSHAFT AXIS SPARK IGNITION ENGINE

2019 ◽  
Author(s):  
Claudio Santana ◽  
Jose Eduardo Mautone Barros ◽  
Juan Carlos Horta Gutiérrez ◽  
Helder Alves de Almeida Junior ◽  
jorgimara braga
Keyword(s):  
Experimental Analysis ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Lubricating Oil ◽  
Vibration Level

USE OF DIFFERENTIAL EQUATIONS TO MEASURE THE POWER LOSS IN SLIDING BEARINGS WITH DIFFERENT LUBRICATING OILS

2018 ◽  
Author(s):  
Guilherme Agues Emerick ◽  
Daniel Zancanella de Camargo ◽  
Jordan Deambrosio Cussuol ◽  
Joana Freitas Campana
Keyword(s):  
Differential Equations ◽  
Power Loss ◽  
Sliding Bearings ◽  
Lubricating Oils

BRUSHFORM 65

Alloy Digest ◽  
2013 ◽  
Vol 62 (6) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Contact Force ◽  
Temperature Rise ◽  
Power Loss ◽  
High Reliability ◽  
Superior Performance ◽  
Contact Interface ◽  
Resistive Heating ◽  
Computer Power

Abstract BrushForm 65 is designed for both superior performance and high reliability in appliance, automotive, and computer power applications. Alloy BF-65’s combination of properties limits power loss at the contact interface, controls temperature rise from resistive heating, and provides stable contact force at temperatures to 200 C (390 F). This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on forming. Filing Code: Cu-821. Producer or source: Materion Brush Performance Alloys.

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