| Citation: | HUANG Wei，BAO Heyun，ZHU Chu，et al.Analysis of squeeze process and engagement characteristics of wet friction clutch［J］.Journal of Aerospace Power，2022，37（9）：1992‑2000. doi: 10.13224/j.cnki.jasp.20210353
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In view of the extrusion mechanism and micro⁃convex contact problem during the engagement process of the wet friction clutch，the oil groove structure on the surface of the friction plate，the material permeability and other factors were comprehensively considered；according to the modified Reynolds equation and the K⁃E （Kogut⁃Etsion） contact model，the wet friction clutch was squeezed in the process，the dynamic pressure bearing capacity，the bearing capacity of the micro convex body and the torque and speed change of the model were analyzed，and the modified Reynolds equation was solved by the finite difference method.For the extrusion characteristics such as the oil film compression speed，the oil film thickness change rate and the load bearing，and the engagement characteristics such as speed and torque，simulation analysis was carried out.And SAE#2 testing machine was used to carry out relevant tests to obtain data such as speed，torque，pressure，friction factor，etc.，and compare them with the simulation analysis.Studies showed that the wet friction clutch engagement process can be divided into three stages，which were usually completed within 1 s，starting at about 0.02 s and transitioning from the extrusion stage to the full micro⁃convex contact stage at about 0.03 s after the compaction stage.The test results were consistent with the theoretical analysis results.
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