Oscillation Compressor Piston Guide Ring for Heat and Wear Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Oscillation-type reciprocating compressors face issues with piston ring alignment and seal failure under high-pressure compression, leading to reduced performance and durability due to increased lateral pressure and heat propagation to the large end portion.
Innovation Solution
A reciprocating compressor design featuring a piston ring with a guide ring that inhibits radial movement and a leak cut piston ring with non-communicating abutment-joint clearances, preventing lateral pressure and maintaining axial alignment, thereby enhancing durability and reducing heat conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an oscillation-type piston mechanism is used to simplify structure and reduce manufacturing costs, then ease of manufacture is improved, but piston alignment with the cylinder deteriorates under high oscillation angles
Solution Approach 1:
A guide ring is introduced as an intermediary component between the oscillating piston and the cylinder. The guide ring has a T-shaped cross-section with a guide surface that contacts the cylinder wall, guiding the piston's oscillating motion and preventing lateral displacement. This mediator absorbs the misalignment caused by large oscillation angles while maintaining the simplicity of the oscillation-type structure.
2Adaptability or versatility
If the piston ring is designed to accommodate displacement, then adaptability is improved, but piston ring and cylinder scuffing worsens under high-pressure compression
Solution Approach 1:
The guide ring acts as a mediator that prevents the piston body from contacting the cylinder wall during oscillation. By guiding the piston's motion path, it eliminates the relative lateral movement between the piston ring and cylinder surface, thereby preventing scuffing while still allowing the piston ring to accommodate axial displacement.
Solution Approach 2:
The sealing and guiding functions are segmented into separate components: the piston ring handles sealing in the axial direction, while the guide ring handles lateral guidance. This segmentation allows each component to optimize its specific function without compromising the other.
3Productivity
If the oscillation-type compressor operates at high pressure, then compression performance is improved, but heat propagation to the large end portion worsens
Solution Approach 1:
The guide ring serves as a thermal barrier between the high-temperature compression zone and the large end portion. By positioning the guide ring to contact the cylinder wall rather than the piston body contacting the cylinder, it creates a thermal isolation path that reduces heat conduction to the large end portion while maintaining compression performance.
4Reliability
If the piston ring receives greater lateral pressure in oscillation-type compressors, then sealing force is improved, but piston ring failure or deformation worsens
Solution Approach 1:
The guide ring mediates the lateral forces by providing a dedicated guidance surface. This allows the piston ring to maintain its sealing function with appropriate lateral pressure while the guide ring absorbs the mechanical stress of guiding the oscillating motion, preventing piston ring failure or deformation.
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
The solution maintains high performance and long-term durability under high-pressure conditions while preventing heat propagation to the large end portion, ensuring reliable operation and extended service life.
Implementation Method 1
a guide ring inhibited from radial movement is mounted in the ring groove
Implementation Method 2
The piston ring has its ring receiving end rounded off in order that the piston ring may not receive lateral pressure on an edge thereof
Implementation Method 3
A leak cut piston ring wherein an abutment-joint clearance on an inner peripheral side thereof is not communicated with an abutment-joint clearance on an outer peripheral side thereof is employed as the piston ring
Data Source
AI summary
A reciprocating compressor including an oscillation-type piston mechanism is provided with a piston ring which is mounted in a piston ring groove to seal a space between a piston and a cylinder. A ring groove other than the piston ring groove is provided at an outer periphery of the piston on a side away from the piston ring groove and closer to a crank shaft. A guide ring, which is inhibited from radial movement and shaped like a skirt opened toward the crank shaft, is mounted in the ring groove. Thus, the oscillation-type reciprocating compressor is adapted to maintain long-term durability even under high-pressure compression condition and to prevent heat propagation to a large end portion.