LAPSE:2021.0475
Published Article
LAPSE:2021.0475
Analysis of Dynamic Engaged Characteristics of Wet Clutch in Variable Speed Transmission of a Helicopter
Heyun Bao, Tongjing Xu, Guanghu Jin, Wei Huang
May 27, 2021
The working principle and motion process of an aviation wet clutch are analyzed. The initial velocity before the friction pair engaged is solved. The transient Reynolds equation is modified, and an oil film bearing capacity model and a micro-convex bearing capacity model are derived. The film thickness equation between N friction pairs and a pressure-plate is derived. A dynamic engaged model of springs, pistons, friction pairs, and pressure plates are established. The torque balance equation is established of two pairs of friction pairs. The friction torque, rate of change in the oil film, and law of relative change in speed are obtained. The results demonstrate that the spring preload and the viscosity of the lubricating oil have a significant influence on the engagement characteristics. Increasing the quality of the friction plate will reduce the time of engagement, whereas the quality of the friction plate has slight effect on the friction torque characteristics and oil film thickness. The initial speed generated by the collision process will reduce the output speed, sharply increase the torque peak at the lock, and increase the shift shock.
Keywords
characteristics of dynamic engagement, oil film thickness, spring preload, variable speed helicopter transmission, wet clutch
Subject
Suggested Citation
Bao H, Xu T, Jin G, Huang W. Analysis of Dynamic Engaged Characteristics of Wet Clutch in Variable Speed Transmission of a Helicopter. (2021). LAPSE:2021.0475
Author Affiliations
Bao H: Laboratory of Science and Technology on Helicopter Transmission (LSTHT), Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing 210016, China
Xu T: Laboratory of Science and Technology on Helicopter Transmission (LSTHT), Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing 210016, China
Jin G: Laboratory of Science and Technology on Helicopter Transmission (LSTHT), Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing 210016, China
Huang W: Laboratory of Science and Technology on Helicopter Transmission (LSTHT), Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing 210016, China
Journal Name
Processes
Volume
8
Issue
11
Article Number
E1474
Year
2020
Publication Date
2020-11-17
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr8111474, Publication Type: Journal Article
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LAPSE:2021.0475
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doi:10.3390/pr8111474
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May 27, 2021
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CC BY 4.0
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[v1] (Original Submission)
May 27, 2021
 
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May 27, 2021
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Original Submitter
Calvin Tsay
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