Operating Performance of External Non-Involute Spur and Helical Gears: A Review

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OKORN, Ivan ;NAGODE, Marko ;KLEMENC, Jernej .
Operating Performance of External Non-Involute Spur  and Helical Gears: A Review. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 67, n.5, p. 256-271, july 2021. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/operating-performance-of-non-involute-spur-and-helical-gears-a-review/>. Date accessed: 01 mar. 2024. 
doi:http://dx.doi.org/10.5545/sv-jme.2020.7094.
Okorn, I., Nagode, M., & Klemenc, J.
(2021).
Operating Performance of External Non-Involute Spur  and Helical Gears: A Review.
Strojniški vestnik - Journal of Mechanical Engineering, 67(5), 256-271.
doi:http://dx.doi.org/10.5545/sv-jme.2020.7094
@article{sv-jmesv-jme.2020.7094,
	author = {Ivan  Okorn and Marko  Nagode and Jernej  Klemenc},
	title = {Operating Performance of External Non-Involute Spur  and Helical Gears: A Review},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {67},
	number = {5},
	year = {2021},
	keywords = {non-involute gears, tooth profile, path of contact, Novikov gears, S-gears, gearing load capacity},
	abstract = {In practical use, most gears have an involute shape of tooth flanks. However, external involute gears have some drawbacks, such as unfavourable kinematic conditions at the beginning and end of meshing, a limited minimum number of teeth, and the highly loaded convex-convex (i.e., non-conformal) contact. Researchers have developed and analysed various non-involute forms of tooth flanks, but they have not been widely accepted. The main reasons are higher manufacturing costs and sensitivity to manufacturing and assembly errors. Analyses of non-involute forms of teeth are mostly theoretical (analytical and numerical), while there is a lack of experimental confirmations of theoretical assumptions. This paper reviews external non-involute shapes, their operating characteristics and possibilities of use compared to involute gears. Established criteria, such as Hertzian pressure, oil film thickness, bending stress at the root of the tooth, contact temperature, and gear noise, were used for assessment. The results of analytical studies and experimental research on S-gears are presented in more detail. S-gears have a higher surface durability and a lower heat load when compared to involute gears. The usability of non-involute gears is increasing with the development of new technologies and materials. However, the advantages of non-involute shapes are not so significant that they could easily displace involute gears, which are cheaper to manufacture.},
	issn = {0039-2480},	pages = {256-271},	doi = {10.5545/sv-jme.2020.7094},
	url = {https://www.sv-jme.eu/article/operating-performance-of-non-involute-spur-and-helical-gears-a-review/}
}
Okorn, I.,Nagode, M.,Klemenc, J.
2021 July 67. Operating Performance of External Non-Involute Spur  and Helical Gears: A Review. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 67:5
%A Okorn, Ivan 
%A Nagode, Marko 
%A Klemenc, Jernej 
%D 2021
%T Operating Performance of External Non-Involute Spur  and Helical Gears: A Review
%B 2021
%9 non-involute gears, tooth profile, path of contact, Novikov gears, S-gears, gearing load capacity
%! Operating Performance of External Non-Involute Spur  and Helical Gears: A Review
%K non-involute gears, tooth profile, path of contact, Novikov gears, S-gears, gearing load capacity
%X In practical use, most gears have an involute shape of tooth flanks. However, external involute gears have some drawbacks, such as unfavourable kinematic conditions at the beginning and end of meshing, a limited minimum number of teeth, and the highly loaded convex-convex (i.e., non-conformal) contact. Researchers have developed and analysed various non-involute forms of tooth flanks, but they have not been widely accepted. The main reasons are higher manufacturing costs and sensitivity to manufacturing and assembly errors. Analyses of non-involute forms of teeth are mostly theoretical (analytical and numerical), while there is a lack of experimental confirmations of theoretical assumptions. This paper reviews external non-involute shapes, their operating characteristics and possibilities of use compared to involute gears. Established criteria, such as Hertzian pressure, oil film thickness, bending stress at the root of the tooth, contact temperature, and gear noise, were used for assessment. The results of analytical studies and experimental research on S-gears are presented in more detail. S-gears have a higher surface durability and a lower heat load when compared to involute gears. The usability of non-involute gears is increasing with the development of new technologies and materials. However, the advantages of non-involute shapes are not so significant that they could easily displace involute gears, which are cheaper to manufacture.
%U https://www.sv-jme.eu/article/operating-performance-of-non-involute-spur-and-helical-gears-a-review/
%0 Journal Article
%R 10.5545/sv-jme.2020.7094
%& 256
%P 16
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 67
%N 5
%@ 0039-2480
%8 2021-07-08
%7 2021-07-08
Okorn, Ivan, Marko  Nagode, & Jernej  Klemenc.
"Operating Performance of External Non-Involute Spur  and Helical Gears: A Review." Strojniški vestnik - Journal of Mechanical Engineering [Online], 67.5 (2021): 256-271. Web.  01 Mar. 2024
TY  - JOUR
AU  - Okorn, Ivan 
AU  - Nagode, Marko 
AU  - Klemenc, Jernej 
PY  - 2021
TI  - Operating Performance of External Non-Involute Spur  and Helical Gears: A Review
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2020.7094
KW  - non-involute gears, tooth profile, path of contact, Novikov gears, S-gears, gearing load capacity
N2  - In practical use, most gears have an involute shape of tooth flanks. However, external involute gears have some drawbacks, such as unfavourable kinematic conditions at the beginning and end of meshing, a limited minimum number of teeth, and the highly loaded convex-convex (i.e., non-conformal) contact. Researchers have developed and analysed various non-involute forms of tooth flanks, but they have not been widely accepted. The main reasons are higher manufacturing costs and sensitivity to manufacturing and assembly errors. Analyses of non-involute forms of teeth are mostly theoretical (analytical and numerical), while there is a lack of experimental confirmations of theoretical assumptions. This paper reviews external non-involute shapes, their operating characteristics and possibilities of use compared to involute gears. Established criteria, such as Hertzian pressure, oil film thickness, bending stress at the root of the tooth, contact temperature, and gear noise, were used for assessment. The results of analytical studies and experimental research on S-gears are presented in more detail. S-gears have a higher surface durability and a lower heat load when compared to involute gears. The usability of non-involute gears is increasing with the development of new technologies and materials. However, the advantages of non-involute shapes are not so significant that they could easily displace involute gears, which are cheaper to manufacture.
UR  - https://www.sv-jme.eu/article/operating-performance-of-non-involute-spur-and-helical-gears-a-review/
@article{{sv-jme}{sv-jme.2020.7094},
	author = {Okorn, I., Nagode, M., Klemenc, J.},
	title = {Operating Performance of External Non-Involute Spur  and Helical Gears: A Review},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {67},
	number = {5},
	year = {2021},
	doi = {10.5545/sv-jme.2020.7094},
	url = {https://www.sv-jme.eu/article/operating-performance-of-non-involute-spur-and-helical-gears-a-review/}
}
TY  - JOUR
AU  - Okorn, Ivan 
AU  - Nagode, Marko 
AU  - Klemenc, Jernej 
PY  - 2021/07/08
TI  - Operating Performance of External Non-Involute Spur  and Helical Gears: A Review
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 67, No 5 (2021): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2020.7094
KW  - non-involute gears, tooth profile, path of contact, Novikov gears, S-gears, gearing load capacity
N2  - In practical use, most gears have an involute shape of tooth flanks. However, external involute gears have some drawbacks, such as unfavourable kinematic conditions at the beginning and end of meshing, a limited minimum number of teeth, and the highly loaded convex-convex (i.e., non-conformal) contact. Researchers have developed and analysed various non-involute forms of tooth flanks, but they have not been widely accepted. The main reasons are higher manufacturing costs and sensitivity to manufacturing and assembly errors. Analyses of non-involute forms of teeth are mostly theoretical (analytical and numerical), while there is a lack of experimental confirmations of theoretical assumptions. This paper reviews external non-involute shapes, their operating characteristics and possibilities of use compared to involute gears. Established criteria, such as Hertzian pressure, oil film thickness, bending stress at the root of the tooth, contact temperature, and gear noise, were used for assessment. The results of analytical studies and experimental research on S-gears are presented in more detail. S-gears have a higher surface durability and a lower heat load when compared to involute gears. The usability of non-involute gears is increasing with the development of new technologies and materials. However, the advantages of non-involute shapes are not so significant that they could easily displace involute gears, which are cheaper to manufacture.
UR  - https://www.sv-jme.eu/article/operating-performance-of-non-involute-spur-and-helical-gears-a-review/
Okorn, Ivan, Nagode, Marko, AND Klemenc, Jernej.
"Operating Performance of External Non-Involute Spur  and Helical Gears: A Review" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 67 Number 5 (08 July 2021)

Authors

Affiliations

  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia 1

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 67(2021)5, 256-271
© The Authors, CC-BY 4.0 Int. Change in copyright policy from 2022, Jan 1st.

https://doi.org/10.5545/sv-jme.2020.7094

In practical use, most gears have an involute shape of tooth flanks. However, external involute gears have some drawbacks, such as unfavourable kinematic conditions at the beginning and end of meshing, a limited minimum number of teeth, and the highly loaded convex-convex (i.e., non-conformal) contact. Researchers have developed and analysed various non-involute forms of tooth flanks, but they have not been widely accepted. The main reasons are higher manufacturing costs and sensitivity to manufacturing and assembly errors. Analyses of non-involute forms of teeth are mostly theoretical (analytical and numerical), while there is a lack of experimental confirmations of theoretical assumptions. This paper reviews external non-involute shapes, their operating characteristics and possibilities of use compared to involute gears. Established criteria, such as Hertzian pressure, oil film thickness, bending stress at the root of the tooth, contact temperature, and gear noise, were used for assessment. The results of analytical studies and experimental research on S-gears are presented in more detail. S-gears have a higher surface durability and a lower heat load when compared to involute gears. The usability of non-involute gears is increasing with the development of new technologies and materials. However, the advantages of non-involute shapes are not so significant that they could easily displace involute gears, which are cheaper to manufacture.

non-involute gears, tooth profile, path of contact, Novikov gears, S-gears, gearing load capacity