Pressure-Medium Reciprocating Device with Conical Piston Alignment
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Solution Overview
Problem
Existing pressure medium powered devices face challenges in achieving reliable, durable, and accurate reciprocating motion due to misalignment and wear of connected parts.
Innovation Solution
A pressure medium powered device with a primary piston and secondary pistons aligned by conical surfaces, ensuring symmetrical and balanced alignment through thread connections, conical ratios of 1:20 or larger, and non-contacting front surfaces, enhancing reliability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cylindrical surfaces are used to connect primary piston and secondary piston, then manufacturing is simpler, but alignment accuracy and reliability deteriorate due to misalignment and wear
Solution Approach 1:
The patent applies conical surfaces instead of cylindrical surfaces to connect the primary piston and secondary piston. The conical surfaces with specific conical ratios (1:20 or larger, 1:1 or smaller) provide self-aligning properties that ensure accurate alignment and reduce wear, directly resolving the contradiction between manufacturing precision and device complexity.
2Manufacturing precision
If front surfaces of pistons are made to touch for alignment, then alignment is achieved, but reliability deteriorates due to increased wear and contact friction
Solution Approach 1:
The conical surfaces act as intermediaries between the primary piston and secondary piston. Instead of direct contact between front surfaces, the conical alignment surfaces mediate the connection, providing accurate alignment while maintaining a gap that prevents direct contact and reduces wear, thereby improving reliability.
3Manufacturing precision
If complex alignment mechanisms are added to ensure symmetrical alignment, then alignment accuracy improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The conical surfaces provide self-aligning properties through their geometric configuration. The conical ratio (1:20 or larger, 1:1 or smaller) automatically ensures symmetrical alignment of the primary and secondary pistons without requiring complex external alignment mechanisms, thereby maintaining manufacturing simplicity while achieving high precision.
Data Source
AI summary
A pressure medium powered device generating a reciprocating motion, which includes a body (5), a primary piston (2), a control valve assembly, and at least one secondary piston (3, 4). The primary piston (2) is fitted inside the body (5). The control valve assembly is configured to move the primary piston (2) back and forth. The secondary piston (3, 4) is attached to the primary piston (2). The primary piston (2) includes a first conical surface (20) and the secondary piston (3, 4) includes a corresponding second conical surface (21), whereby the primary piston (2) and the secondary piston (3, 4) are aligned to each other by means of the first conical surface (20) and the second conical surface (21).