Uniform Power Transmission Gears

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HLEBANJA, Gorazd ;HLEBANJA, Jože .
Uniform Power Transmission Gears. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 55, n.7-8, p. 472-483, august 2017. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/uniform-power-transmission-gears/>. Date accessed: 07 mar. 2021. 
doi:http://dx.doi.org/.
Hlebanja, G., & Hlebanja, J.
(2009).
Uniform Power Transmission Gears.
Strojniški vestnik - Journal of Mechanical Engineering, 55(7-8), 472-483.
doi:http://dx.doi.org/
@article{.,
	author = {Gorazd  Hlebanja and Jože  Hlebanja},
	title = {Uniform Power Transmission Gears},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {55},
	number = {7-8},
	year = {2009},
	keywords = {zero sliding gears; conformal helical gears; oil-film thickness; flash temperature; uniform power transmission gears; },
	abstract = {A new type of lubricated gears is presented in this paper, referred to as Uniform Power Transmission Gears (UPTG), which have conformal shaped teeth flanks that enable a more uniform transmission of power and motion. The proposed teeth flanks comprise three arcs: an addendum arc, a dedendum arc, with both of these joined by a connecting arc. These UPT gears have been derived from Hawkins’ patented Zero Sliding Gears (ZSG) [4]. The name Uniform Power Transmission Gears derives from the fact that these gears operate during power transmission with an almost constant value of friction and a nearly constant value of power transmission. Thus, the power transmission of the UPT gears occurs simultaneously with the doublecontact teeth flanks of the driving and driven gears, which means the transmitted power is divided into two parts: the contact pressure in the contacts is lower, and the gear pair conjugates as helical gears. UPT gears can be produced on common gear cutting machines based on a rolling process where teeth shapes are formed by successive enveloping cuts of a cutter. However, the cutter teeth should be manufactured by the UPT rack profile. A comparison of the UPTGs with involute-type gears is presented. The radii of curvature are investigated in detail and the velocities in the teeth flank contacts were analyzed. Additionally, an investigation of oil-film thickness using the theory of Hamrock and Dowson is discussed. Owing to the decisive influence of heat caused by friction on gears’ scuffing resistance, and the heating of the teeth flanks based on Blok’s flash-temperature criterion, we have made a careful study and the results are presented. Because the power transmission with UPTGs occurs mostly by rolling, with only a minor amount by sliding, such gears are very suitable for heavy-duty power transmission at relatively slow speed working conditions.},
	issn = {0039-2480},	pages = {472-483},	doi = {},
	url = {https://www.sv-jme.eu/article/uniform-power-transmission-gears/}
}
Hlebanja, G.,Hlebanja, J.
2009 August 55. Uniform Power Transmission Gears. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 55:7-8
%A Hlebanja, Gorazd 
%A Hlebanja, Jože 
%D 2009
%T Uniform Power Transmission Gears
%B 2009
%9 zero sliding gears; conformal helical gears; oil-film thickness; flash temperature; uniform power transmission gears; 
%! Uniform Power Transmission Gears
%K zero sliding gears; conformal helical gears; oil-film thickness; flash temperature; uniform power transmission gears; 
%X A new type of lubricated gears is presented in this paper, referred to as Uniform Power Transmission Gears (UPTG), which have conformal shaped teeth flanks that enable a more uniform transmission of power and motion. The proposed teeth flanks comprise three arcs: an addendum arc, a dedendum arc, with both of these joined by a connecting arc. These UPT gears have been derived from Hawkins’ patented Zero Sliding Gears (ZSG) [4]. The name Uniform Power Transmission Gears derives from the fact that these gears operate during power transmission with an almost constant value of friction and a nearly constant value of power transmission. Thus, the power transmission of the UPT gears occurs simultaneously with the doublecontact teeth flanks of the driving and driven gears, which means the transmitted power is divided into two parts: the contact pressure in the contacts is lower, and the gear pair conjugates as helical gears. UPT gears can be produced on common gear cutting machines based on a rolling process where teeth shapes are formed by successive enveloping cuts of a cutter. However, the cutter teeth should be manufactured by the UPT rack profile. A comparison of the UPTGs with involute-type gears is presented. The radii of curvature are investigated in detail and the velocities in the teeth flank contacts were analyzed. Additionally, an investigation of oil-film thickness using the theory of Hamrock and Dowson is discussed. Owing to the decisive influence of heat caused by friction on gears’ scuffing resistance, and the heating of the teeth flanks based on Blok’s flash-temperature criterion, we have made a careful study and the results are presented. Because the power transmission with UPTGs occurs mostly by rolling, with only a minor amount by sliding, such gears are very suitable for heavy-duty power transmission at relatively slow speed working conditions.
%U https://www.sv-jme.eu/article/uniform-power-transmission-gears/
%0 Journal Article
%R 
%& 472
%P 12
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 55
%N 7-8
%@ 0039-2480
%8 2017-08-21
%7 2017-08-21
Hlebanja, Gorazd, & Jože  Hlebanja.
"Uniform Power Transmission Gears." Strojniški vestnik - Journal of Mechanical Engineering [Online], 55.7-8 (2009): 472-483. Web.  07 Mar. 2021
TY  - JOUR
AU  - Hlebanja, Gorazd 
AU  - Hlebanja, Jože 
PY  - 2009
TI  - Uniform Power Transmission Gears
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - zero sliding gears; conformal helical gears; oil-film thickness; flash temperature; uniform power transmission gears; 
N2  - A new type of lubricated gears is presented in this paper, referred to as Uniform Power Transmission Gears (UPTG), which have conformal shaped teeth flanks that enable a more uniform transmission of power and motion. The proposed teeth flanks comprise three arcs: an addendum arc, a dedendum arc, with both of these joined by a connecting arc. These UPT gears have been derived from Hawkins’ patented Zero Sliding Gears (ZSG) [4]. The name Uniform Power Transmission Gears derives from the fact that these gears operate during power transmission with an almost constant value of friction and a nearly constant value of power transmission. Thus, the power transmission of the UPT gears occurs simultaneously with the doublecontact teeth flanks of the driving and driven gears, which means the transmitted power is divided into two parts: the contact pressure in the contacts is lower, and the gear pair conjugates as helical gears. UPT gears can be produced on common gear cutting machines based on a rolling process where teeth shapes are formed by successive enveloping cuts of a cutter. However, the cutter teeth should be manufactured by the UPT rack profile. A comparison of the UPTGs with involute-type gears is presented. The radii of curvature are investigated in detail and the velocities in the teeth flank contacts were analyzed. Additionally, an investigation of oil-film thickness using the theory of Hamrock and Dowson is discussed. Owing to the decisive influence of heat caused by friction on gears’ scuffing resistance, and the heating of the teeth flanks based on Blok’s flash-temperature criterion, we have made a careful study and the results are presented. Because the power transmission with UPTGs occurs mostly by rolling, with only a minor amount by sliding, such gears are very suitable for heavy-duty power transmission at relatively slow speed working conditions.
UR  - https://www.sv-jme.eu/article/uniform-power-transmission-gears/
@article{{}{.},
	author = {Hlebanja, G., Hlebanja, J.},
	title = {Uniform Power Transmission Gears},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {55},
	number = {7-8},
	year = {2009},
	doi = {},
	url = {https://www.sv-jme.eu/article/uniform-power-transmission-gears/}
}
TY  - JOUR
AU  - Hlebanja, Gorazd 
AU  - Hlebanja, Jože 
PY  - 2017/08/21
TI  - Uniform Power Transmission Gears
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 55, No 7-8 (2009): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - zero sliding gears, conformal helical gears, oil-film thickness, flash temperature, uniform power transmission gears, 
N2  - A new type of lubricated gears is presented in this paper, referred to as Uniform Power Transmission Gears (UPTG), which have conformal shaped teeth flanks that enable a more uniform transmission of power and motion. The proposed teeth flanks comprise three arcs: an addendum arc, a dedendum arc, with both of these joined by a connecting arc. These UPT gears have been derived from Hawkins’ patented Zero Sliding Gears (ZSG) [4]. The name Uniform Power Transmission Gears derives from the fact that these gears operate during power transmission with an almost constant value of friction and a nearly constant value of power transmission. Thus, the power transmission of the UPT gears occurs simultaneously with the doublecontact teeth flanks of the driving and driven gears, which means the transmitted power is divided into two parts: the contact pressure in the contacts is lower, and the gear pair conjugates as helical gears. UPT gears can be produced on common gear cutting machines based on a rolling process where teeth shapes are formed by successive enveloping cuts of a cutter. However, the cutter teeth should be manufactured by the UPT rack profile. A comparison of the UPTGs with involute-type gears is presented. The radii of curvature are investigated in detail and the velocities in the teeth flank contacts were analyzed. Additionally, an investigation of oil-film thickness using the theory of Hamrock and Dowson is discussed. Owing to the decisive influence of heat caused by friction on gears’ scuffing resistance, and the heating of the teeth flanks based on Blok’s flash-temperature criterion, we have made a careful study and the results are presented. Because the power transmission with UPTGs occurs mostly by rolling, with only a minor amount by sliding, such gears are very suitable for heavy-duty power transmission at relatively slow speed working conditions.
UR  - https://www.sv-jme.eu/article/uniform-power-transmission-gears/
Hlebanja, Gorazd, AND Hlebanja, Jože.
"Uniform Power Transmission Gears" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 55 Number 7-8 (21 August 2017)

Authors

Affiliations

  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia
  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 55(2009)7-8, 472-483

A new type of lubricated gears is presented in this paper, referred to as Uniform Power Transmission Gears (UPTG), which have conformal shaped teeth flanks that enable a more uniform transmission of power and motion. The proposed teeth flanks comprise three arcs: an addendum arc, a dedendum arc, with both of these joined by a connecting arc. These UPT gears have been derived from Hawkins’ patented Zero Sliding Gears (ZSG) [4]. The name Uniform Power Transmission Gears derives from the fact that these gears operate during power transmission with an almost constant value of friction and a nearly constant value of power transmission. Thus, the power transmission of the UPT gears occurs simultaneously with the doublecontact teeth flanks of the driving and driven gears, which means the transmitted power is divided into two parts: the contact pressure in the contacts is lower, and the gear pair conjugates as helical gears. UPT gears can be produced on common gear cutting machines based on a rolling process where teeth shapes are formed by successive enveloping cuts of a cutter. However, the cutter teeth should be manufactured by the UPT rack profile. A comparison of the UPTGs with involute-type gears is presented. The radii of curvature are investigated in detail and the velocities in the teeth flank contacts were analyzed. Additionally, an investigation of oil-film thickness using the theory of Hamrock and Dowson is discussed. Owing to the decisive influence of heat caused by friction on gears’ scuffing resistance, and the heating of the teeth flanks based on Blok’s flash-temperature criterion, we have made a careful study and the results are presented. Because the power transmission with UPTGs occurs mostly by rolling, with only a minor amount by sliding, such gears are very suitable for heavy-duty power transmission at relatively slow speed working conditions.

zero sliding gears; conformal helical gears; oil-film thickness; flash temperature; uniform power transmission gears;