THE CUSHION OF HYDRAULIC CYLINDER FOR HIGH VOLTAGE GIS

摘要

A cushion of hydraulic cylinder for high voltage GIS is provided to prevent deterioration of a cushion function by releasing internal impact of a hydraulic cylinder which is generated in switching of a high pressure GIS(Gas Insulated Switchgear). A hydraulic cylinder cushion apparatus(100) for a high pressure GIS includes a cushion body(10) and a cushion ring(20). The cushion body is fixed to a cylinder tube for preventing the impact with a head block when a cylinder road is operated. An opening and closing passage(13) are formed in the cushion body, and a hydraulic oil passes through opening and closing passage of a cylinder rod. The cushion ring release impact in opening and closing of the cylinder rod, and the cushion body comprises an auxiliary ring(30).