Surface Temperature and Scoring Resistance of Heavy-Duty Gears

1974 ◽  
Vol 96 (2) ◽  
pp. 385-390 ◽  
Author(s):  
Jiro Ishikawa ◽  
Kunikazu Hayashi ◽  
Masaaki Yokoyama
Keyword(s):  
Surface Temperature ◽  
Spur Gear ◽  
Heavy Duty ◽  
Gear Teeth ◽  
Dynamic Thermocouple ◽  
Thermocouple Method ◽  
Scoring Resistance ◽  
Experimental Equation

The surface temperature on spur gear teeth is measured by the newly developed dynamic thermocouple method. From a large number of the results an experimental equation for the surface temperature is obtained. The effect of tip relief on the surface tempera-perature rise is also studied.

Comparison of Theories and Experimental Results for Surface Temperature of Spur Gear Teeth

1974 ◽  
Vol 96 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Yoshio Terauchi ◽  
Hidetaro Mori
Keyword(s):  
Surface Temperature ◽  
Spur Gear ◽  
Experimental Results ◽  
Dynamic Loads ◽  
Gear Teeth ◽  
Transmission Errors ◽  
Temperature Discontinuity ◽  
Dynamic Thermocouple ◽  
Scoring Resistance ◽  
Good Coincidence

The surface temperature of gear teeth is one of the important factors for evaluating the scoring resistance of a gear. In a present paper, the comparison of numerically calculated value with experimentally measured value is reported. The calculation of surface temperature was performed with the following procedure. First, the dynamic loads applied to gear teeth were calculated in consideration of the variation of different factors, for instance transmission errors of test gears and total stiffness of gear teeth. Second, under the condition that there must be no temperature discontinuity over the contact zone of sliding surfaces, the temperature distribution over the contact area was calculated. On the other hand, the measurement of surface temperature was performed using the meshing gears themselves as a dynamic thermocouple. The results of numerical solution by means of a digital computer are in fairly good coincidence with the experimental results.

Power Loss of Spur Gear Drive Lubricated With Traction Oil

2003 ◽  
Author(s):  
Kiyotaka Ikejo ◽  
Kazuteru Nagamura
Keyword(s):  
Surface Temperature ◽  
Electrical Resistance ◽  
Power Loss ◽  
Gear Tooth ◽  
Spur Gear ◽  
Resistance Method ◽  
Gear Drive ◽  
Dynamic Thermocouple ◽  
Thermocouple Method ◽  
Lubrication Condition

This paper describes the effect of traction oil on the power loss of spur gear drive. In this study, we measured the power loss of super gear drive using several traction oils. We separated the power loss into gear friction loss and oil churning loss. Furthermore, we measured the surface temperature on the gear tooth by the dynamic thermocouple method, and observed the lubrication condition between meshing teeth by the electrical resistance method. Then, we investigated the relationships between the power loss of the gear drive lubricated with the traction oil, the surface temperature on the gear tooth, and the lubrication condition.

scholarly journals Measurement of Surface Temperature of Spur Gear Teeth by Thermocouples

1994 ◽  
Vol 60 (570) ◽  
pp. 675-679 ◽  
Author(s):  
Gang Deng ◽  
Noboru Maruyama ◽  
Kunihiko Morikawa ◽  
Nobuteru Hitomi ◽  
Masana Kato
Keyword(s):  
Surface Temperature ◽  
Spur Gear ◽  
Gear Teeth

scholarly journals Operating temperatures of oil-lubricated medium-speed gears: Numerical models and experimental results

2003 ◽  
Vol 217 (2) ◽  
pp. 87-106 ◽  
Author(s):  
H Long ◽  
A A Lord ◽  
D T Gethin ◽  
B J Roylance
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Surface Temperature ◽  
Rotational Speed ◽  
High Speed ◽  
Applied Load ◽  
Frictional Heat ◽  
Transfer Coefficients ◽  
Gear Teeth ◽  
Heat Transfer Coefficients

This paper investigates the effects of gear geometry, rotational speed and applied load, as well as lubrication conditions on surface temperature of high-speed gear teeth. The analytical approach and procedure for estimating frictional heat flux and heat transfer coefficients of gear teeth in high-speed operational conditions was developed and accounts for the effect of oil mist as a cooling medium. Numerical simulations of tooth temperature based on finite element analysis were established to investigate temperature distributions and variations over a range of applied load and rotational speed, which compared well with experimental measurements. A sensitivity analysis of surface temperature to gear configuration, frictional heat flux, heat transfer coefficients, and oil and ambient temperatures was conducted and the major parameters influencing surface temperature were evaluated.

The Compliance of Solid, Wide-Faced Spur Gears

1990 ◽  
Vol 112 (4) ◽  
pp. 590-595 ◽  
Author(s):  
J. H. Steward
Keyword(s):  
Experimental Data ◽  
Contact Line ◽  
Load Distribution ◽  
3D Model ◽  
Spur Gear ◽  
Point Load ◽  
Spur Gears ◽  
Line Load ◽  
Gear Teeth ◽  
Theoretical Results

In this paper, the requirements for an accurate 3D model of the tooth contact-line load distribution in real spur gears are summarized. The theoretical results (obtained by F.E.M.) for the point load compliance of wide-faced spur gear teeth are set out. These values compare well with experimental data obtained from tests on a large spur gear (18 mm module, 18 teeth).

Sign in / Sign up

Export Citation Format

Share Document