A reciprocating three-stage ultra-high pressure air compressor

The design of a piston-type three-stage compressor enables the filling of ultra-high pressure air, solves the problem of insufficient outlet pressure of existing air compressors, provides support for a highly efficient pneumatic control system, and reduces reliance on ground equipment.

CN122565677APending Publication Date: 2026-08-14JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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Patent Information

Application Number
CN202610834613.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-10
Publication Date
2026-08-14

AI Technical Summary

Technical Problem

Existing air compressors have low outlet pressures, making it difficult to meet the filling requirements of high-pressure gas cylinders. Furthermore, traditional solutions rely on ground-based equipment for filling, which cannot provide continuous pneumatic operation capabilities.

Method used

It adopts a three-stage piston compressor design, which achieves an air filling capacity of over 15MPa through a three-stage piston compression structure and crankshaft connecting rod mechanism. It includes first, second and third stage compression processes, and uses angled steps and expansion ring sealing technology to ensure sealing and lubrication effects.

Benefits of technology

It achieves the ability to fill with ultra-high pressure air, reduces reliance on ground-based high-pressure filling equipment, improves the operational capability of the pneumatic control system, and enhances system efficiency through an automatic adaptive intake and exhaust design.

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Abstract

This invention belongs to the field of air compression technology and relates to an ultra-high pressure air compressor with a three-stage piston compression system. It includes a three-stage piston compression structure consisting of a main piston, a main cylinder, a third-stage cylinder, and a third-stage piston. The first and second stages of compression are respectively located in the moving space between the piston head and the piston outer wall surface and the cylinder inner wall surface. The piston and cylinder have two working diameters. During the periodic reciprocating motion of the piston, a periodic changing space is formed between the piston end and the piston and cylinder wall, achieving two stages of compression within a single piston and cylinder. This technology enables ultra-high pressure air compression, achieving an air filling capacity of over 15 MPa, which is crucial for restoring the operational capability of pneumatic control systems and reducing reliance on ground-based high-pressure filling equipment.
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