Piston rod through Y-ring

The hydraulic cylinder part structure of the GJ2C5-45 type leather shaving machine produced by our factory (Fig. 1), when the front cover 6 is installed, the piston rod 3 is to pass through the Y-shaped sealing ring 4. The lip size of the Y-ring 4 is smaller than the radial dimension of the piston rod 3, and the sharp edge A of the end of the piston rod 3 easily cuts the sealing lip. Use the piston rod 3 directly through the Y-ring 4 and