High-pressure sealing element, high-pressure oil cylinder and manufacturing method of high-pressure sealing element

• Main Author: WU MURONG
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2020
• Subjects: BLASTING; CYLINDERS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; THERMAL INSULATION IN GENERAL; WEAPONS

The invention discloses a high-pressure sealing element, a high-pressure oil cylinder and a manufacturing method of the high-pressure sealing element. The high-pressure sealing element comprises a first sealing ring and a second sealing ring. A step is arranged at one end of the first sealing ring. The second sealing ring sleeves the step. When the high-pressure sealing element is installed on a piston rod, the end, with the step, of the first sealing ring faces the side away from an oil cavity, that is, when the pressure is released, the high-pressure oil flushes the end surface of the firstsealing ring, the material hardness of the first sealing ring is greater than the material hardness of the second sealing ring, and the material elasticity of the second sealing ring is greater than the material elasticity of the first sealing; and when the end, with the step, of the first sealing ring faces the side of the oil cavity, the material hardness of the first sealing ring is less than that of the second sealing