Scroll Compressor Wrap Interference Prevention
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Solution Overview
Problem
Conventional scroll compressors experience interference between the orbiting and fixed wraps, leading to leakage gaps and compression loss due to the offset of the orbiting scroll, which results in vibration and noise issues.
Innovation Solution
The implementation of an interference prevention portion at the arc compression surface, where the interval between the fixed and orbiting wraps is larger than the orbiting radius, and the formation of key recesses and an Oldham ring with a tolerance gap to prevent rotation moment and maintain proper alignment, ensuring the orbiting scroll performs a smooth orbital motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the orbiting scroll is coupled to the rotation shaft with the coupling point on the same surface as the orbiting wrap, then the repulsive force and reaction force application points coincide eliminating tilt, but the tolerance gap between key recesses and keys causes rotation moment and wrap interference
Solution Approach 1:
The interference prevention portion is formed in advance on the orbiting wrap to preemptively prevent the fixed wrap from interfering with the orbiting wrap during compression. This preliminary structural preparation eliminates the harmful effect of the tolerance gap-induced rotation moment before it can cause wrap interference or leakage gaps.
2Reliability
If the tolerance gap between key recesses and keys is reduced to eliminate rotation moment, then wrap interference is prevented, but the orbiting scroll cannot perform smooth orbital motion
Solution Approach 1:
The solution segments the functional requirements by separating the orbital motion function (achieved through tolerance gap allowing sliding between keys and key recesses) from the wrap engagement function (protected by the interference prevention portion). This segmentation allows both the tolerance gap and interference prevention portion to coexist, enabling smooth orbital motion while preventing wrap interference.
3Stress or pressure
If the number of turns of the wrap is increased to achieve high compression ratio, then compression ratio is improved, but the size of the scroll compressor increases
Solution Approach 1:
The invention changes the geometric parameters of the wrap by forming an interference prevention portion with specific depth and position parameters. This parameter modification allows the wrap to maintain high compression ratio capability while reducing the overall compressor size by optimizing the wrap engagement geometry and preventing interference that would require larger dimensions.
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 configuration prevents interference between the wraps, reducing leakage gaps and enhancing compression efficiency by maintaining proper alignment and reducing the occurrence of gaps between the fixed and orbiting wraps, thereby improving the overall performance and stability of the scroll compressor.
Implementation Method 1
an orbiting scroll having an orbiting wrap which forms a compression chamber by being engaged with the fixed wrap, having a rotation shaft coupling portion at a center portion thereof, having an arc compression surface which forms the compression chamber around the rotation shaft coupling portion, and performing an orbital motion with respect to the fixed scroll
Data Source
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AI summary
Disclosed is a scroll compressor. An interference prevention portion is formed on a side wall surface of at least one of a fixed wrap and an orbiting wrap. Under such configuration, the end of the fixed wrap does not interfere with the orbiting wrap at an arc compression surface of the orbiting wrap, but is inserted into the interference prevention portion. Accordingly, occurrence of a gap between the fixed wrap and the orbiting wrap can be prevented, and thus compression efficiency can be enhanced.