Combined Pistons for Air Compressors

Abstract

The invention relates to a combined piston for an air compressor. The combined piston provided by the invention comprises a piston body arranged in a cylinder, and a piston end cover, wherein the piston end cover is fixed on the piston body through a fastening piece, a first air inlet hole is formed in the piston body in the axial direction, a second air inlet hole is formed in the piston end cover, a valve piece is arranged between the piston end cover and the piston body, during the air intake of the cylinder, the edge of the valve piece is lifted so as to enable the first air inlet hole to be communicated with the second air inlet hole, or during air exhaust of the cylinder, a seal cover is positioned in the position of the first air inlet hole so as to enable the first air inlet hole and the second air inlet hole to be under two mutually isolated states; a lift limiter or a lift limiting structure for limiting the lifting angle of the valve piece is arranged on the piston end cover. The combined piston provided by the invention has a simple and compact structure, is convenient to disassemble, and is suitable for being mounted on a minitype air compressor with small space dimension. The combined piston provided by the invention can remarkably improve the air intake efficiency of the air compressor, can enable the interior of the cylinder to be excellent in air tightness during a compression process, improves the air exhaust efficiency, and saves energy consumption of the compressor.

Description

technical field [0001] The invention belongs to the field of air compressors, in particular to a combined piston for an air compressor. Background technique [0002] The air compressor is one of the tools that people often use in production and life. Usually, the compressor includes a piston assembly and a cylinder. The piston assembly and the cylinder cooperate to form a compression chamber. The design of the piston assembly is closely related to the performance of the air compressor. [0003] The piston assembly in the air compressor in the prior art mainly includes a piston body, a piston ring, and a piston rod. An inner hole is formed in the center of the piston body. The piston rod passes through the inner hole and is fixedly connected with the piston body. An annular groove is formed, and the piston ring is installed in the annular groove to seal the gap between the piston body and the cylinder, and the piston assembly may include a plurality of piston rings. Chinese ...

AI Technical Summary

Problems solved by technology

However, the air compressor with this structure always has a clearance volume at the end of the exhaust process, and the compressed air in the clearance volume will expand during the next suction, thereby reducing the amount of air sucked in, reducing efficiency, and increasing Compression work

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