SEALING UNIT DESIGN FOR HYDRO OR Pneumatic Actuator

摘要

1. The design of the sealing unit for hydraulic or pneumatic drive (10), in which the piston (22) moves along the cylindrical chamber (20A, 20b) under the action of liquid or gas supplied under pressure to the cylindrical chamber (20a, 20b) of the cylindrical pipe (16) ), to maintain the airtightness of the cylindrical chamber (20a, 20b), containing! a seal (70) mounted on an open end portion (40) of said cylindrical pipe (16), where said seal (70) includes:! a first sealing element (74) clamped between said cylindrical pipe (16) and a casing (18) that closes said open end portion (40); and! the second sealing element (76) surrounding the outer circumferential surface of the piston rod (24) connected to said piston (22),! wherein said seal (70) is formed from an elastic material. ! 2. The design of the sealing assembly for a hydraulic or pneumatic actuator according to claim 1, characterized in that said seal (70) is mounted integrally on a plate-shaped base (68) and is clamped between said casing (18) and said cylindrical pipe (16). ! 3. The design of the sealing unit for a hydraulic or pneumatic actuator according to claim 2, characterized in that said first sealing element (74) is provided with a protrusion (80, which projects towards at least one of: said cylindrical pipe (16) and said casing (18).! 4. The design of the sealing assembly for a hydraulic or pneumatic actuator according to claim 3, characterized in that said second sealing element (76) is provided with flanges (82, 84) that protrude in the direction of the outer circumferential surface of said rod (24)