Rotating Reciprocating Piston Compressor Pump Body
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Solution Overview
Problem
Piston compressors with linkage transmission suffer from efficiency losses and require complex balanced structures due to eccentric main shafts, leading to inefficiencies and increased complexity, especially in multi-stage designs.
Innovation Solution
A pump body design that includes a cylinder assembly, piston, and motion transmission structure, allowing the piston to rotate relative to the cylinder while reciprocating, utilizing wave-shaped rail grooves and guide structures to enhance movement efficiency and reduce gas leakage, with a motion transmission structure that includes a shaft member and anti-rotation features to prevent relative rotation and facilitate synchronous movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If linkage transmission with eccentric main shaft is used, then piston reciprocating motion is achieved, but transmission efficiency is reduced and structure becomes complex
Solution Approach 1:
Instead of using an eccentric main shaft to generate piston motion through linkage transmission, the patent inverts the approach by using a centrally positioned main shaft that directly drives the piston through a motion transmission structure. The piston's reciprocating motion is achieved not by eccentric rotation but by the interaction between the piston's guide structure and the cylinder's rail groove, eliminating the need for complex linkage mechanisms and improving transmission efficiency.
2Stress or pressure
If multi-stage piston compressor is designed, then compression ratio is improved, but structure complexity increases due to eccentric main shaft requirements
Solution Approach 1:
The patent applies multi-functionality by designing a single main shaft that can drive multiple pistons in a multi-stage compressor configuration. The motion transmission structure with rail grooves and guide structures serves multiple functions: it transmits rotational motion to reciprocating motion, guides piston movement, and maintains proper alignment. This universal approach allows multi-stage compression to be achieved without requiring separate eccentric shaft mechanisms for each stage, thereby reducing overall structural complexity.
3Productivity
If piston only reciprocates without rotation, then simple motion is achieved, but transmission efficiency is reduced
Solution Approach 1:
The patent applies dynamics by enabling the piston to perform combined rotational and reciprocating motions simultaneously. The piston rotates about its own axis while reciprocating along the cylinder axis, creating a dynamic motion pattern that improves transmission efficiency. This is achieved through the interaction between the piston's guide structure and the cylinder's wave-shaped rail groove, which converts the main shaft's rotational motion into the piston's compound motion, thereby enhancing gas sealing and reducing leakage compared to simple reciprocating motion.
Data Source
AI summary
The present disclosure provides a pump body, a compressor, and a heat exchange apparatus. The pump body includes a cylinder assembly, a piston, a motion transmission structure, and a drive member. The cylinder assembly includes a cylinder. The piston is movably disposed in the cylinder. The drive member is connected to the piston through the motion transmission structure. An outer peripheral wall of the piston has a rail groove connected end to end in a circumferential direction, and the cylinder has a guide structure extending into the rail groove; or an inner surface of the cylinder has a rail groove connected end to end in the circumferential direction, and the piston has a guide structure extending into the rail groove. So that through driving of the piston by the drive member, the piston is capable of rotating relative to the cylinder while reciprocating along a rotating axis of the piston.