| 摘要 |
A water-hydraulic machine (1) is disclosed with at least two parts which are movable relative to one another, of which one has a surface composed of a plastic (5, 12, 13, 15, 19) with friction-reducing properties. Improvement of friction-reducing properties is achieved by injection molding a composite material on the surface of at least one of the two parts, wherein the composite comprises a basic polymer resin, preferably PEEK, and ceramic filler particles, the particles having a dimension of up to 1 ¼m. The friction-reducing surface treatment may be utilised for any parts in relative motion in the water-hydraulic machine, such as cyilnder liner, sliding shoe for swash plates, wear rings in general or bearing surfaces. With such a design the wear in case of a water-hydraulic machine should be kept low. |
