Oil seal mechanism for plastic machine

Abstract

The invention belongs to the field of plastic machine parts and particularly relates to an oil seal mechanism for a plastic machine. The oil seal mechanism comprises a copper sleeve, a plurality of annular T-shaped grooves are formed in the circumferential face of the sleeve, T-shaped sealing rings are embedded in the T-shaped grooves, an installation step is arranged in the sleeve and fixedly provided with an inner sealing ring, an annular rectangular groove is formed in the end face of the inner sealing ring, a plurality of elastic components are fixedly arranged in the rectangular groove in the radial direction, and the notch of the rectangular groove is sealed with a sealing gasket. The oil seal mechanism has the advantages of being simple and practical in structure and capable of playing a role in interior and exterior reliable sealing through the T-shaped sealing rings and convex ridges of the inner sealing ring.

Description

technical field [0001] The invention belongs to the field of plastic machinery accessories, in particular to an oil seal mechanism for plastic machinery. Background technique [0002] Oil seals are mainly used to seal the leakage of low-pressure working medium or lubricating oil and prevent external dust and impurities from invading the equipment. Oil seals are widely used on the rotating shafts of various hydraulic pumps and hydraulic motors to prevent the leakage of oil in the working chamber. , the standard seals used for rotating shafts now usually use packing seals, rubber seals, and labyrinth seals. However, although packing seals are economical, they are unreliable and often leak, while rubber seals are suitable for temperature and pressure. The scope is limited. When the external environmental factors change, it is easy to produce rubber aging and then falling off. The sealing effect is poor. The labyrinth seal belongs to the gap seal, and the manufacturing process i...

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Problems solved by technology

[0002] Oil seals are mainly used to seal the leakage of low-pressure working medium or lubricating oil and prevent external dust and impurities from invading the equipment. Oil seals are widely used on the rotating shafts of various hydraulic pumps and hydraulic motors to prevent the leakage of oil in the working chamber. , the standard seals used for rotating shafts now usually use packing seals, rubber seals, and labyrinth seals. However, although packing seals are economical, they are unreliable and often leak, while rubber seals are suitable for temperature and pressure. The scope is limited. When the external environmental factors change, it is easy to cause the rubber to age and then fall off. The sealing effect is poor. The labyrinth seal belongs to the gap seal, and the manufacturing process is difficult. Therefore, in the field of plastic machinery, there is no good oil seal structure.

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