| 摘要 |
PURPOSE:To prevent a gap part from entering a solid into it by reducing a friction factor at the time of opening and closing of a valve stem, by pouring grease into a gap part between a valve stem and a valve stem guide cylinder of a steam turbine through a grease pouring port. CONSTITUTION:A hole 19 is provided on the center of a valve stem 16 of a steam valve of a subterranean heat turbine and grease is poured into a gap between the valve stem 16 and a guide cylinder 15 with pressure from a grease nipple 20 provided on one edge part of the valve stem 16 through a hole 19. With this construction, lubricating characteristic of the valve stem 16 is improved and generation of sticking by intruding a solid into the gap from a vapor duct part. |
