Crankshaft leakage-free dynamic sealing structure for CNG compressor

• Main Authors: LUO YUN, HE JINPING, LUO BINFENG, DENG CHENGYAN, LUO QINYU, WANG YONG, LIU QIONGBING
• Format: Patent
• Language: Chinese; English
• Published: 28.02.2023
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model discloses a crankshaft leakage-free dynamic sealing structure for a CNG (compressed natural gas) compressor, which solves the technical problem that the internal structure and parts of a machine body are damaged due to natural gas leakage of the machine body of the existing CNG compressor. The sealing device comprises a sealing outer shell, a gasket, a dustproof lip, a secondary sealing lip, a sealing ring, a main sealing lip and a sealing inner shell which are arranged on a crankshaft in a sleeving mode, the gasket, the dustproof lip, the secondary sealing lip, the sealing ring, the main sealing lip and the sealing inner shell are sequentially embedded in the sealing outer shell, and an extension spring is arranged on the main sealing lip in a sleeving mode. The sealing structure is simple in structure, scientific and reasonable in design and convenient to use, the sealing connection between the two ends of the crankshaft and the box body can be effectively improved by adopting a leakage-fr