A Piston Ring Structure Suitable for Miniature Oil-free Compressors to Operate in Wide Conditions

Abstract

The invention relates to the technical field of oil-free compressors, in particular to a piston ring structure suitable for a miniature oil-free compressor operating under wide working conditions. The present invention comprises a ring body, the left opening end of the ring body protrudes along the ring body circumferential direction with a lower extension block, the right open end of the ring body protrudes along the ring body circumferential direction with an upper extension block, the lower extension block and the lower extension block The blocks are parallel to each other, and the upper extension block and the right opening end of the ring body cooperate to form a right step part, and the adjacent surfaces of the upper extension block and the lower extension block are perpendicular to the axis of the ring body and are arranged in a face-to-face fit; the upper extension block and / or the lower extension block The extension block is provided with a sub-extension block protruding along the circumferential direction of the ring body, and the corresponding opening end of the ring body is recessed with a matching notch for the sub-extension block to extend into. The sub-extension block is parallel to the adjacent surface of the matching notch or The oblique direction intersects with the axis of the ring body and the two adjacent surfaces are arranged in close contact. The invention can ensure the sealing effect of the piston ring relative to the piston body, thereby effectively reducing the leakage of the compressor, and is suitable for the operation of the compressor under wide operating conditions.

Description

technical field [0001] The invention relates to the technical field of oil-free compressors, in particular to a piston ring structure suitable for the operation of a miniature oil-free compressor under wide working conditions. Background technique [0002] As one of the key components of an oil-free compressor, the structure and design parameters of the piston ring have an important influence on the performance of the compressor. The traditional oil-free compression piston ring is in the form of a split ring, so as to provide a radial movement margin and always fit the piston body when thermal expansion occurs due to work. Due to the design and assembly of traditional piston rings, there must be an opening gap at the opening of the piston ring, and the opening gap will cause a certain leakage channel between the inner ring surface and the surface of the piston body. In actual work, on the one hand, the existing piston ring pays too much attention to the sealing effect in th...

AI Technical Summary

Problems solved by technology

However, due to the degree of freedom in the circumferential direction of the piston ring, after most piston rings have been running for a period of time, the openings of the two rings will gradually approach, which will lead to an increase in the leakage of the compressor, and the effect is obviously not ideal.

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