Double-acting Piston Compressor Gas Exchange
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Solution Overview
Problem
Double-acting piston compressors face challenges with reduced gas compression due to lack of gas exchange on the piston head side and increased technical complexity, along with heating issues from compression heat in the expansion chamber.
Innovation Solution
A method that controls a double-acting piston compressor by using valves to manage gas flow between chambers, allowing pre-compressed gas to be redirected and compressed gas to be delivered efficiently, reducing compression heat and adapting to required volume through controlled pre-compression and stage pressure regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only one side of the piston is used for delivery in a double-acting piston compressor, then the piston rod side can be sealed off from the atmosphere, but gas compression is reduced due to lack of gas exchange on the piston head side
Solution Approach 1:
The patent combines the functions of the piston rod side chamber and piston head side chamber by introducing a connecting line that allows gas exchange between the two chambers. This merging enables both sides of the piston to contribute to compression while maintaining sealing reliability, as the gas is recirculated internally rather than requiring separate sealing systems for each side.
Solution Approach 2:
The connecting line acts as an intermediary pathway between the piston rod side chamber and piston head side chamber. This intermediary structure enables gas to flow between chambers, facilitating continuous compression on both sides of the piston while maintaining proper sealing, thus resolving the contradiction between sealing reliability and compression efficiency.
2Reliability
If a piston rod seal is used to seal off the piston rod side from the atmosphere, then sealing is achieved, but technical complexity increases
Solution Approach 1:
The patent merges the sealing requirements of both piston sides by creating a shared gas pathway through the connecting line. This eliminates the need for separate atmosphere sealing on the piston rod side, as both chambers now operate with the same gas environment, thereby reducing the number of seals required and simplifying the overall sealing system.
Solution Approach 2:
The connecting line serves multiple functions: it enables gas exchange between chambers for improved compression, acts as a pressure equalization pathway, and eliminates the need for additional atmosphere sealing mechanisms. This multi-functionality reduces device complexity while maintaining sealing reliability.
3Productivity
If pre-compression is increased to improve delivery quantity, then volume adaptation is improved, but compression heat increases
Solution Approach 1:
The patent implements continuous gas circulation between the piston rod side chamber and piston head side chamber through the connecting line. This continuous action allows for staged compression where gas is progressively compressed across both chambers, improving delivery quantity while distributing the compression heat generation more evenly, thereby reducing peak temperatures compared to single-stage high pre-compression.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves gas compression efficiency, reduces compression heat, and optimizes delivery quantity by regulating pressure ratios, effectively addressing the limitations of existing designs.
Implementation Method 1
the gas in the first chamber (11) between the cylinder cover (04) and the piston surface (02) is compressed
Implementation Method 2
the gas in the second chamber (12) between the cylinder base (05) and the piston surface (02) is compressed
Implementation Method 3
the pre-compressed gas, which exceeds the pressure in the suction pipe, is pushed out of the second chamber (12) via the connecting pipe (06) and the connected suction pipe (07) into the first chamber (11)
Data Source
AI summary
The device has a cylinder (1) with a piston (2), and a piston rod (3), a cover-side cylinder side (4) and a crank-sided cylinder side (5), where suction side of the cover-side cylinder side is connected with the crank-sided cylinder side by a connection line (6). A suction line (7) at the suction side and a pressure line (8) at the pressure side of the cover-side cylinder side, are connected respectively. A valve is arranged in the connection line, and another valve is arranged in the suction line.