Curved Connecting Rod Compressor for Longer Stroke and Lower Friction
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Solution Overview
Problem
Existing compressors with rectangular connecting rods have a short distance from the crankshaft to the crank pin, resulting in a small piston stroke and air exhaust volume, and suffer from high lateral pressure and friction due to the overlapping centerlines of the connecting rod and piston pin, which reduces efficiency.
Innovation Solution
A compressor design featuring curved connecting rods that increase the distance from the crankshaft to the crank pin, formed by a rigid connection between three parts with a curved apex, allowing for a longer piston stroke and increased air exhaust without the limitations of traditional connecting rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the distance from the center of the crankshaft to the center of the crank pin is increased, then the piston stroke is increased, but the connecting rod structure becomes more complex
Solution Approach 1:
The connecting rod is designed with a curved shape instead of a straight configuration. This curvature allows the connecting rod to achieve a longer effective length and increase the piston stroke while maintaining a compact overall structure, thus resolving the contradiction between increasing stroke and managing structural complexity
2Productivity
If the connecting rod is made longer to increase piston stroke, then the air exhaust volume is increased, but the lateral pressure on the cylinder wall increases
Solution Approach 1:
The curved configuration of the connecting rod optimizes the transmission of force from the crank pin to the piston. The curvature allows for better alignment of force vectors, reducing the lateral component of the force that acts on the cylinder wall, thereby decreasing lateral pressure while still achieving increased piston stroke and air exhaust volume
3Device complexity
If the centerline of the connecting rod overlaps with the centerline of the piston pin hole, then the structure is simplified, but friction on the cylinder wall and piston surface increases
Solution Approach 1:
The curved shape of the connecting rod intentionally offsets the centerline from overlapping with the piston pin hole centerline. This angular arrangement, created by the curvature, reduces the lateral forces and sliding friction between the piston and cylinder wall, as well as between the piston pin and its hole, thereby reducing harmful friction while maintaining structural efficiency
Data Source
AI summary
A compressor having curved connecting rods, comprising cylinders (8), pistons (9), piston pins (10), curved connecting rods (11), a swing rod (12), a crank pin (13), a crankshaft (14) and the other components; when the compressor having curved connecting rods works, a power machine driving the crankshaft (14) to rotate, the rotation of the crankshaft (14) driving the crank pin (13) to push the swing rod (12) to swing left and right, and the movement, towards the left and right, of the swing rod (12) driving the curved connecting rods (11) and the pistons (9) to reciprocate within the cylinders (8) and perform work in a compression manner.