Scroll Compressor Oil Discharge Layout for Lower Flow Loss
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Solution Overview
Problem
Existing scroll compressors experience efficiency losses due to flow loss caused by contact between oil and rotating structures, leading to increased friction, noise, and reduced reliability.
Innovation Solution
The design incorporates an oil discharge passage through the frame to redirect oil away from rotating structures, reducing contact and energy loss, and includes overlapping bearings to minimize eccentric loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil is used for lubrication in the scroll compressor, then bearing reliability is improved, but flow loss increases due to contact between oil and rotating structures
Solution Approach 1:
The patent extracts oil from the rotation path by providing a dedicated oil discharge passage that redirects oil away from the rotating structures (orbiting scroll and bearings). The oil is discharged from the boss receiving groove through the frame to the housing, preventing oil from contacting rotating components while maintaining lubrication where needed.
Solution Approach 2:
The patent segments the lubrication system by providing separate oil supply paths and discharge paths. Oil is supplied to specific bearing locations through controlled passages while unwanted oil is discharged through a separate dedicated passage, allowing selective lubrication and preventing oil from entering rotation paths.
2Force
If oil contacts rotating structures for lubrication, then friction is reduced, but noise increases
Solution Approach 1:
The patent removes oil from the noise-generating rotation path by providing a dedicated discharge passage. Oil is extracted from the boss receiving groove and redirected through the frame to the housing, preventing oil from contacting rotating structures that would generate noise while maintaining necessary lubrication.
3Device complexity
If traditional bearing arrangement is used, then structural simplicity is maintained, but eccentric loads increase
Solution Approach 1:
The patent arranges bearings in an overlapping configuration where the first bearing and second bearing overlap each other in the radial direction. This spatial arrangement in multiple dimensions allows the bearings to share and distribute eccentric loads more effectively while maintaining overall structural simplicity.
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 enhances efficiency, reduces noise, improves bearing reliability, and allows for a more compact compressor design by minimizing friction and energy loss from oil interactions.
Implementation Method 1
a second bearing between the boss portion and the eccentric portion to rotatably support the eccentric portion, the second bearing configured to overlap at least partially with the first bearing in a radial direction of the first bearing
Data Source
AI summary
Provided is a scroll compressor including: a housing; a frame; a fixed scroll, an orbiting scroll including a boss portion; a shaft including an eccentric portion insertable into the boss and an oil passage; a bearing member couplable to the shaft, configured to rotate together with the shaft, and including a boss receiving groove in which the boss portion is insertable; a first bearing between the frame and the bearing member; and a second bearing between the boss portion and the eccentric portion, the second bearing configured to overlap at least partially with the first bearing in a radial direction of the first bearing, wherein the frame includes an oil discharge passage and based on the eccentric portion being inserted into the boss portion, the oil discharge passage is formed to pass through a portion of the frame such that oil is discharged.