ABSTRACT
Hydro-viscous speed-adjusting clutch belongs to the liquid coherent transmission, this is an emerging discipline. It is transmits the power using the liquid coherency and lubricant film cutting. Its basic principle is the Newton internal friction law: Between two parallel plates fills the coherent liquid, forms certain thickness the oil. When two plates make the relative motion, during lubricant film receives the shear action, the power passes on by the driving disc to by the shifting plate. The lubricant film transmits the shear stress size and the liquid dynamic viscosity is proportional, is proportional with two plate relative velocities, is in reverse proportion with the lubricant film thickness. Hydro-viscous speed-adjusting clutch is becomes according to the above principle of work design. Hydro viscous speed-adjusting clutch changes through the adjustment lubricant film thickness transmits the power the size, thus achieved the stepless speed regulation the goal, Poor access to efficient without rotational speed direct transmission, in theory at this time without power loss is a new type of soft start device; And liquid became governor through control oil pressure starts to control the size of the transmission of torque and can limit transmission of torque automatically, which play a protective role of drive train system. Papers discussed Hydro-viscous speed-adjusting clutch its own characteristics compared with other clutch differences, the study analyzed the current status of its domestic and foreign; Contain such weak overall program design and some parts of the mainframe to the design, calculation and verification.
Key words: hydro-viscous drive;hydro-viscous speed-adjusting clutch;stepless timing; soft-start