PRESSURE-BALANCING OIL SYSTEM FOR STERN TUBES OF SHIPS

摘要

The oil pressure in the stern tube is maintained by the oil height in a standpipe. Valves, which are responsive to the water pressure at the level of the stern tube are arranged to automatically control the oil level in the standpipe to thereby increase or decrease the oil pressure in the stern tube and thereby maintain said pressure at a desired value above the water pressure at the level of the stern tube.