Rotary Compressor Oil Groove Vane Piston Gap
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Solution Overview
Problem
Conventional rotary compressors lack effective lubricating oil supply to sliding portions, leading to reduced lubricity and sealability due to retained lubricating oil in the vane recess without an outlet, causing decreased viscosity and performance.
Innovation Solution
A rotary compressor design featuring an oil groove on the end plate facing the vane, with one end communicating with the sealed container and the other end exposed in the gap between the vane and annular piston, allowing lubricating oil to flow out and supply to sliding portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lubricating oil is retained in the recess of the sidewall portion of the vane, then sliding performance of sliding portions is improved, but temperature of the lubricating oil rises due to sliding, viscosity decreases, and lubricity and sealability are reduced
Solution Approach 1:
The invention extracts the lubricating oil from the recess in the vane sidewall and relocates it to a reservoir formed in the end plate. This allows the oil to be stored in a dedicated location with controlled access, preventing overheating in the recess while maintaining supply to sliding portions through a controlled outlet mechanism.
Solution Approach 2:
The invention introduces an intermediary outlet structure (oil supply hole with valve mechanism) between the lubricating oil reservoir and the sliding portions. This intermediary controls the flow of oil, ensuring it is supplied only when needed and preventing excessive heating by regulating the oil supply timing and amount.
2Reliability
If lubricating oil is retained in the recess of the sidewall portion of the vane without an outlet, then sliding performance is temporarily improved, but sufficient lubricating oil is not supplied to sliding portions, reducing lubricity and sealability
Solution Approach 1:
The invention extracts the lubricating oil from the limited recess space in the vane and relocates it to a larger reservoir formed in the end plate. This provides a sufficient quantity of lubricating oil that can be continuously supplied to sliding portions through the outlet mechanism, ensuring adequate lubrication throughout operation.
Solution Approach 2:
The invention prepares lubricating oil in advance by storing it in the end plate reservoir with a pre-configured outlet mechanism. This preliminary preparation ensures that lubricating oil is readily available and can be immediately supplied to sliding portions when needed, maintaining adequate lubrication levels.
3Reliability
If a recess is provided in the sidewall portion of the vane to retain lubricating oil, then contact area with end plates is reduced, but the retained lubricating oil cannot flow out, reducing lubricity and sealability
Solution Approach 1:
The invention extracts the lubricating oil retention function from the vane recess and relocates it to a dedicated reservoir in the end plate. This separation allows the vane recess to focus on reducing contact area while the end plate reservoir handles oil storage and flow control through its outlet mechanism.
Solution Approach 2:
The invention introduces an intermediary outlet structure (oil supply hole with valve mechanism) in the end plate that mediates between the lubricating oil reservoir and the sliding portions. This intermediary enables controlled flow of lubricating oil, ensuring it reaches sliding portions effectively while maintaining the reduced contact area design.
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
This design enhances lubricating oil supply to sliding parts, improving sliding performance and ensuring sealability within the working chamber, thereby enhancing energy efficiency and reliability.
Implementation Method 1
an other end side of the oil groove being exposed in a gap between the leading end surface of the vane and the outer peripheral surface of the annular piston formed when the leading end surface of the vane is in abutment on the outer peripheral surface of the annular piston
Implementation Method 2
it is necessary to take measures to improve sliding performance of the sliding portions
Implementation Method 3
viscosity of the lubricating oil decreases, reducing lubricity and sealability in the working chamber
Data Source
AI summary
Provided is a rotary compressor excellent in energy saving performance and reliability by improving sliding performance of a sliding portion and ensuring sealability in a working chamber. An oil groove is formed at a position facing a vane end face on an end plate. The oil groove communicates with an inside of a sealed container, and is exposed in a gap between a leading end surface of a vane and an outer peripheral surface of an annular piston formed when the leading end surface of the vane is in abutment on the outer peripheral surface of the annular piston.