EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions

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SCARAGGI, Michele ;DE NOVELLIS, Leonardo ;CARBONE, Giuseppe .
EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 56, n.4, p. 253-260, october 2017. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/ehl-squeeze-in-high-loaded-contacts-the-case-of-chain-cvt-transmissions/>. Date accessed: 06 jun. 2020. 
doi:http://dx.doi.org/.
Scaraggi, M., De Novellis, L., & Carbone, G.
(2010).
EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions.
Strojniški vestnik - Journal of Mechanical Engineering, 56(4), 253-260.
doi:http://dx.doi.org/
@article{.,
	author = {Michele  Scaraggi and Leonardo  De Novellis and Giuseppe  Carbone},
	title = {EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {56},
	number = {4},
	year = {2010},
	keywords = {continuously variable transmission; elasto-hydrodymaic lubrication; squeeze motion; multibody; },
	abstract = {We analyze the lubrication conditions at the pin-pulley interface in a Gear Chain Industrial chain CVT. In particular, we focus on the squeeze of oil which occurs as soon as the pin enters the pulley groove. The duration time to complete the squeeze process compared with the running time the pin takes to cover the entire arc of contact is fundamental to determine what actually is the lubrication regime at the interface. Taking into account that for normal CVT operations the time the pin spends in contact with the pulley groove is of about 0.01 s (traveling time), we show that rms surface roughness less than 0.1 μm and squeezing load of about 1kN acting on the pin, corresponding to values adopted in such systems, guarantee a fully lubricated EHL regime at the interface. We also show that during low-velocity CVT operations, the lubrication regime at the interface is determined by a succession of hydrodynamic and mixed lubrication stages in an order strictly related to the squeezing load history.},
	issn = {0039-2480},	pages = {253-260},	doi = {},
	url = {https://www.sv-jme.eu/article/ehl-squeeze-in-high-loaded-contacts-the-case-of-chain-cvt-transmissions/}
}
Scaraggi, M.,De Novellis, L.,Carbone, G.
2010 October 56. EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 56:4
%A Scaraggi, Michele 
%A De Novellis, Leonardo 
%A Carbone, Giuseppe 
%D 2010
%T EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions
%B 2010
%9 continuously variable transmission; elasto-hydrodymaic lubrication; squeeze motion; multibody; 
%! EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions
%K continuously variable transmission; elasto-hydrodymaic lubrication; squeeze motion; multibody; 
%X We analyze the lubrication conditions at the pin-pulley interface in a Gear Chain Industrial chain CVT. In particular, we focus on the squeeze of oil which occurs as soon as the pin enters the pulley groove. The duration time to complete the squeeze process compared with the running time the pin takes to cover the entire arc of contact is fundamental to determine what actually is the lubrication regime at the interface. Taking into account that for normal CVT operations the time the pin spends in contact with the pulley groove is of about 0.01 s (traveling time), we show that rms surface roughness less than 0.1 μm and squeezing load of about 1kN acting on the pin, corresponding to values adopted in such systems, guarantee a fully lubricated EHL regime at the interface. We also show that during low-velocity CVT operations, the lubrication regime at the interface is determined by a succession of hydrodynamic and mixed lubrication stages in an order strictly related to the squeezing load history.
%U https://www.sv-jme.eu/article/ehl-squeeze-in-high-loaded-contacts-the-case-of-chain-cvt-transmissions/
%0 Journal Article
%R 
%& 253
%P 8
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 56
%N 4
%@ 0039-2480
%8 2017-10-24
%7 2017-10-24
Scaraggi, Michele, Leonardo  De Novellis, & Giuseppe  Carbone.
"EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions." Strojniški vestnik - Journal of Mechanical Engineering [Online], 56.4 (2010): 253-260. Web.  06 Jun. 2020
TY  - JOUR
AU  - Scaraggi, Michele 
AU  - De Novellis, Leonardo 
AU  - Carbone, Giuseppe 
PY  - 2010
TI  - EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - continuously variable transmission; elasto-hydrodymaic lubrication; squeeze motion; multibody; 
N2  - We analyze the lubrication conditions at the pin-pulley interface in a Gear Chain Industrial chain CVT. In particular, we focus on the squeeze of oil which occurs as soon as the pin enters the pulley groove. The duration time to complete the squeeze process compared with the running time the pin takes to cover the entire arc of contact is fundamental to determine what actually is the lubrication regime at the interface. Taking into account that for normal CVT operations the time the pin spends in contact with the pulley groove is of about 0.01 s (traveling time), we show that rms surface roughness less than 0.1 μm and squeezing load of about 1kN acting on the pin, corresponding to values adopted in such systems, guarantee a fully lubricated EHL regime at the interface. We also show that during low-velocity CVT operations, the lubrication regime at the interface is determined by a succession of hydrodynamic and mixed lubrication stages in an order strictly related to the squeezing load history.
UR  - https://www.sv-jme.eu/article/ehl-squeeze-in-high-loaded-contacts-the-case-of-chain-cvt-transmissions/
@article{{}{.},
	author = {Scaraggi, M., De Novellis, L., Carbone, G.},
	title = {EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {56},
	number = {4},
	year = {2010},
	doi = {},
	url = {https://www.sv-jme.eu/article/ehl-squeeze-in-high-loaded-contacts-the-case-of-chain-cvt-transmissions/}
}
TY  - JOUR
AU  - Scaraggi, Michele 
AU  - De Novellis, Leonardo 
AU  - Carbone, Giuseppe 
PY  - 2017/10/24
TI  - EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 56, No 4 (2010): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - continuously variable transmission, elasto-hydrodymaic lubrication, squeeze motion, multibody, 
N2  - We analyze the lubrication conditions at the pin-pulley interface in a Gear Chain Industrial chain CVT. In particular, we focus on the squeeze of oil which occurs as soon as the pin enters the pulley groove. The duration time to complete the squeeze process compared with the running time the pin takes to cover the entire arc of contact is fundamental to determine what actually is the lubrication regime at the interface. Taking into account that for normal CVT operations the time the pin spends in contact with the pulley groove is of about 0.01 s (traveling time), we show that rms surface roughness less than 0.1 μm and squeezing load of about 1kN acting on the pin, corresponding to values adopted in such systems, guarantee a fully lubricated EHL regime at the interface. We also show that during low-velocity CVT operations, the lubrication regime at the interface is determined by a succession of hydrodynamic and mixed lubrication stages in an order strictly related to the squeezing load history.
UR  - https://www.sv-jme.eu/article/ehl-squeeze-in-high-loaded-contacts-the-case-of-chain-cvt-transmissions/
Scaraggi, Michele, De Novellis, Leonardo, AND Carbone, Giuseppe.
"EHL-Squeeze in High Loaded Contacts: The Case of Chain CVT Transmissions" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 56 Number 4 (24 October 2017)

Authors

Affiliations

  • DIMeG-Politecnico di Bari, Italy
  • DIMeG-Politecnico di Bari, Italy
  • DIMeG-Politecnico di Bari, Italy

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 56(2010)4, 253-260

We analyze the lubrication conditions at the pin-pulley interface in a Gear Chain Industrial chain CVT. In particular, we focus on the squeeze of oil which occurs as soon as the pin enters the pulley groove. The duration time to complete the squeeze process compared with the running time the pin takes to cover the entire arc of contact is fundamental to determine what actually is the lubrication regime at the interface. Taking into account that for normal CVT operations the time the pin spends in contact with the pulley groove is of about 0.01 s (traveling time), we show that rms surface roughness less than 0.1 μm and squeezing load of about 1kN acting on the pin, corresponding to values adopted in such systems, guarantee a fully lubricated EHL regime at the interface. We also show that during low-velocity CVT operations, the lubrication regime at the interface is determined by a succession of hydrodynamic and mixed lubrication stages in an order strictly related to the squeezing load history.

continuously variable transmission; elasto-hydrodymaic lubrication; squeeze motion; multibody;