| 摘要 |
<p>Oil pressure operated pump for marine steering gears consisting of an oil pressure operated pump (8) with multiple pistons (42) controlled by a handwheel and featuring a set of non-return and oil flow control valves (1,7,18), featuring a double acting oil pressure operated cylinder driven by these valves and axially acting through its mobile shaft on the engine or rudder of the boat, while the valve set consists of three separate elements which can be easily bolted together and mounted in the pump casing by bolts (16, 17), these elements being: the valve housing (1) secured under the oil pressure operated pump, the cover (18) closing the lower end of the valve housing (1), the valve set (7) lodged in the valve housing (1), the valve housing (1) and the cover (18) closing the lower end of the valve housing being shaped by pressure die-casting preferably in aluminium alloy or in zinc-alloy or by injection moulding in thermoplastic material and including all channels and holes for bolting as well as the borings for oil-dinamic connections, while the valve set (7) consists of components lodged in a tubular shell (24) provided with a properly shaped central tubular through-hole (25), this valve set (7) being provided with the necessary channels, lathe-turned with motor-driven tools X-Y-Z to cut the production costs, to facilitate manufacture and maintenance. <IMAGE></p> |
