Abstract：Hydro-viscous drive(HVD)clutch is a type of power transmission device using shear stress of multi-oil films, and it is especially applied to regulate speed for large fans and pumps. However, uniform pressure and velocity of lubricating oil film between friction pairs are difficult to achieve, which can lead to over heating,deformation and uneven wear problem for the frictional disks of HVD clutch. In order to solve the problems, a new type of HVD clutch with a centrifugal oil chamber was proposed. Consequently, the lubricating oil can get into the entrance to friction pairs uniformly under the centrifugal force. Based on the fluid dynamic theory,three-dimensional flow field models of two different oil channel structures were established. Furthermore, the numerical simulation of the flow field of different lubricating oil channel was conducted by the Fluent.The influence of the oil channel structure on pressure and velocity distribution of the entrance to friction pair was researched.The results show that the centrifugal oil chamber design and improve the uniformity of pressure and velocity of the entrance to friction pairs,and greatly improve the working performance and service life for HVD clutch.
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