Scroll Compressor Sealing Strip for Axial Gap Control
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Solution Overview
Problem
Existing scroll compressors face issues with pressure imbalance between the orbiting and fixed scrolls, leading to axial movement, noise, wear, and reduced volumetric efficiency due to axial gaps and unnecessary backpressure causing medium leakage.
Innovation Solution
A novel design featuring a sealing groove and sealing strip on the orbiting scroll that automatically adjusts to eliminate axial gaps by allowing high-pressure medium to enter a backpressure chamber, maintaining contact and preventing leakage while avoiding excessive wear and efficiency loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high-pressure media is used to establish backpressure on the transmission assembly side of the orbiting scroll to eliminate axial gap, then axial gap is eliminated, but contact pressure between orbiting scroll and fixed scroll increases unnecessarily causing increased wear and reduced volumetric efficiency
Solution Approach 1:
The patent introduces a dynamic pressure regulation mechanism through the pressure regulation hole and sealing strip. The sealing strip can move relative to the pressure regulation hole, allowing the system to dynamically adjust the backpressure level based on operating conditions. This dynamic adjustment eliminates the need for constant high backpressure, thereby reducing wear while maintaining axial gap elimination when needed.
Solution Approach 2:
The patent changes the pressure parameter dynamically by providing a pressure regulation hole that can be selectively opened or closed by the sealing strip. When the sealing strip covers the pressure regulation hole, backpressure is maintained to eliminate axial gap. When the hole is opened, backpressure is released to prevent excessive wear. This parameter change approach allows the system to optimize between gap elimination and wear prevention.
2Stability of the object's composition
If high-pressure media is used to establish backpressure to eliminate axial gap, then axial gap is eliminated, but high-pressure medium is consumed unnecessarily reducing volumetric efficiency
Solution Approach 1:
The sealing strip dynamically adjusts its position relative to the pressure regulation hole based on system needs. When axial gap elimination is required, the sealing strip covers the hole to trap high-pressure medium and create backpressure. When the gap is already eliminated or wear prevention is prioritized, the sealing strip opens the hole to release backpressure and prevent high-pressure medium consumption. This dynamic control optimizes medium usage.
Solution Approach 2:
The system uses its own high-pressure medium to regulate its own operation through the pressure regulation mechanism. The sealing strip, moved by pressure differential, automatically controls when backpressure should be applied or released, enabling the system to self-regulate medium consumption without external intervention.
3Stability of the object's composition
If backpressure is continuously maintained to prevent axial gap, then axial gap is prevented, but contact pressure increases causing increased wear of orbiting scroll and fixed scroll
Solution Approach 1:
The patent implements periodic action through the oscillating sealing strip that periodically covers and uncovers the pressure regulation hole. The sealing strip moves back and forth in response to pressure differential, creating periodic cycles of backpressure application and release. This periodic action allows the system to maintain axial gap prevention only when necessary, reducing cumulative wear over time while maintaining scroll reliability.
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 design effectively eliminates axial gaps and maintains high volumetric efficiency by automatically adjusting to pressure changes, reducing wear and medium consumption, and preventing unnecessary backpressure.
Implementation Method 1
allowing high-pressure medium to enter a backpressure chamber, maintaining contact and preventing leakage while avoiding excessive wear
Data Source
AI summary
A scroll compressor includes a fixed scroll having a fixed disk body and a fixed scroll body protruding from the fixed disk body; and an orbiting scroll having an orbiting disk body and an orbiting scroll body protruding from the orbiting disk body and cooperating with the fixed scroll body. The orbiting disk body has a bottom surface away from the orbiting scroll body, and the orbiting scroll body has a top surface away from the orbiting disk body. The orbiting scroll is provided with a sealing groove recessed from the top surface and a through hole extending from the bottom wall of the sealing groove to the bottom surface, and also includes a sealing strip accommodated in the sealing groove. The inner end of the sealing strip respectively defines an end gap and a bottom gap with the inner end wall and the bottom wall of the sealing groove.