Cryocooler Flexible Connection Pipe Design to Reduce Pressure Drop
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Solution Overview
Problem
Flexible connection pipes for cryocoolers often result in a pressure drop, leading to decreased performance compared to rigid pipes, and existing solutions like double-pipe structures fail to adequately address this issue.
Innovation Solution
A flexible connection pipe design featuring a connection hose with a flexible pipe and a flexible tube, where the tube is inserted into the pipe and connected using adapters to prevent gas leakage and maintain low pressure in the cavity, reducing pressure drop and maintaining performance comparable to rigid pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a rigid pipe is used to connect constituent elements, then pressure drop is reduced, but the ability to change relative positions and installation layout flexibility is limited
Solution Approach 1:
The flexible tube is inserted into the flexible pipe, creating a nested structure where the inner tube is surrounded by the outer pipe. This nested configuration allows the connection hose to maintain structural integrity while providing flexibility for position adjustment and installation layout variations, resolving the contradiction between rigidity for low pressure drop and flexibility for adaptability.
Solution Approach 2:
The connection hose employs flexible pipes and flexible tubes made of elastic materials that can bend and deform without breaking. This flexibility enables the connection hose to adapt to different installation layouts and relative positions of constituent elements while the dual-layer structure minimizes pressure drop, thus resolving the contradiction between flexibility and pressure loss.
2Adaptability or versatility
If a flexible pipe is used to increase installation freedom, then adaptability is improved, but pressure drop increases leading to performance decrease
Solution Approach 1:
The flexible tube inserted into the flexible pipe creates a nested structure that reduces the effective flow path length and minimizes turbulence. This nested configuration allows the flexible connection to maintain lower pressure drop compared to a single flexible pipe, thus resolving the contradiction between installation freedom and pressure drop.
Solution Approach 2:
The connection hose combines multiple flexible pipe layers (inner flexible tube and outer flexible pipe) to create a composite structure. This composite design provides both the flexibility needed for installation freedom and the structural characteristics to reduce pressure drop, resolving the contradiction between adaptability and energy loss.
3Ease of manufacture
If the tube end portion is inserted into the pipe end portion without close contact, then ease of assembly is improved, but gas leakage occurs reducing reliability
Solution Approach 1:
The connection adapter serves as an intermediary component that facilitates the connection between the flexible tube and flexible pipe. It enables easy assembly while simultaneously ensuring close contact between the tube end portion and pipe end portion to prevent gas leakage, thus resolving the contradiction between ease of assembly and reliability.
Solution Approach 2:
The connection adapter provides localized enhancement at the connection point, creating a region of close contact between the flexible tube and flexible pipe. This local quality improvement ensures gas-tight sealing at the critical connection area while maintaining ease of assembly, resolving the contradiction between manufacturing ease and leakage prevention.
Data Source
AI summary
A flexible connection pipe for a cryocooler includes a connection hose that includes a flexible pipe which is provided with a pipe end portion and a flexible tube which is provided with a tube end portion coming into close contact with the pipe end portion and which is inserted into the flexible pipe and a connection adapter that connects the connection hose to a constituent element of the cryocooler, the connection adapter being adjacent to the tube end portion and being fixed to the pipe end portion.