Scroll Compressor Fixed Scroll Groove for Stable Oil Supply
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Solution Overview
Problem
The flow rate of oil supplied to the suction ports in scroll compressors is unstable, leading to poor lubrication between the fixed and orbiting scrolls, especially when the oil is not uniformly distributed, which can cause inefficiencies in the compression process.
Innovation Solution
A scroll compressor design that includes an oil supply hole in the fixed scroll with a groove that communicates with the oil storage chamber, allowing the oil to be temporarily stored and evenly distributed to the suction chamber as the orbiting scroll revolves, ensuring consistent lubrication between the fixed and orbiting scrolls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil is supplied directly from the oil supply passage to the suction chamber, then the structure is simple, but the oil flow rate is unstable and lubrication is poor
Solution Approach 1:
The groove is formed in advance in the fixed scroll at a position corresponding to the oil supply hole or on the outer side of the oil supply hole in the radial direction. This preliminary structural preparation allows the groove to function as a temporary storage space for oil, enabling stable and uniform supply to multiple suction ports without requiring complex additional components.
2Reliability
If a single oil supply passage is used, then the structure is simple, but uniform distribution of oil to multiple suction ports cannot be achieved
Solution Approach 1:
The groove acts as an intermediary structure between the oil supply passage and the suction chamber. Oil flows from the oil supply passage into the groove, which then distributes the oil uniformly to multiple suction ports. This intermediary groove eliminates the need for multiple separate oil supply passages while achieving uniform distribution.
3Adaptability or versatility
If oil flow rate varies with operating status, then the system adapts to different conditions, but lubrication consistency deteriorates
Solution Approach 1:
The groove serves as a cushioning storage space that compensates for fluctuations in oil flow rate. When oil flow increases, the groove stores the excess oil; when flow decreases, the groove releases stored oil. This beforehand cushioning effect maintains consistent oil supply to the suction ports regardless of operating condition variations.
Data Source
AI summary
A scroll compressor includes: a housing; a rotary shaft; a fixed scroll including a fixed base plate, a fixed spiral wall, and an outer peripheral wall; an orbiting scroll including an orbiting base plate and an orbiting spiral wall; a compression chamber; a suction port; a suction chamber; a discharge chamber; an oil storage chamber; and an oil supply hole. The fixed scroll includes a groove disposed at the same position as the oil supply hole or on an outer side with respect to the oil supply hole in a radial direction of the rotary shaft. At least part of the groove is configured to be closed by the orbiting base plate according to a revolution of the orbiting scroll. The oil supply hole and the groove form part of an oil supply passage that supplies oil in the oil storage chamber to the suction chamber.