Scroll Compressor Sealing via Segmented Alignment Pin
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Solution Overview
Problem
Existing scroll fluid machines, such as compressors, face inefficiencies in compression due to inadequate sealing by parallel pins, leading to fluid leakage and reduced reliability, especially at high temperatures.
Innovation Solution
Incorporation of alignment pins and seal members in alignment holes within the orbiting scroll and backside plate to ensure accurate positioning and sealing of compression chambers, utilizing sealants to enhance sealing characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a parallel pin is used to fasten the orbiting scroll and backside plate, then alignment accuracy is improved, but sealing performance deteriorates
Solution Approach 1:
The fastening function is divided into two separate components: an alignment pin for positioning and a seal member for sealing. This segmentation allows each component to be optimized for its specific function, with the alignment pin ensuring accurate positioning and the seal member preventing fluid leakage through the through-hole.
Solution Approach 2:
A seal member is introduced as an intermediary element between the alignment pin and the compression chamber. This seal member fills the gap between the alignment pin and the through-hole, preventing high-temperature compressed fluid from leaking while maintaining the alignment function of the pin.
2Measurement precision
If a parallel pin is used for alignment, then positioning accuracy is improved, but fluid leakage increases
Solution Approach 1:
The positioning and sealing functions are separated into distinct components. The alignment pin provides precise positioning through its fit in the alignment hole, while the seal member independently addresses the fluid leakage issue by filling the gap between the pin and the through-hole.
Solution Approach 2:
The seal member acts as an intermediary that prevents compressed fluid from leaking through the alignment hole. It fills the gap between the alignment pin and the through-hole, blocking the path of high-temperature fluid while allowing the alignment pin to maintain its positioning function.
3Manufacturing precision
If compressed fluid leaks from the gap between the alignment pin and through-hole, then alignment is maintained, but heat deterioration of bearing and lubricant increases
Solution Approach 1:
The seal member serves as a protective intermediary that blocks high-temperature compressed fluid from reaching the bearing and lubricant areas. By filling the gap between the alignment pin and the through-hole, it prevents hot fluid leakage that would cause thermal degradation of surrounding components.
Solution Approach 2:
The potential harmful effect of fluid leakage through the alignment hole is converted into a beneficial sealing action. The seal member transforms the leakage path into a controlled seal, preventing hot fluid from damaging the bearing and lubricant while maintaining the alignment function.
Data Source
AI summary
A scroll fluid machine is provided that includes: a fixed scroll; an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting with a plurality of compression chambers formed between the orbiting scroll and the fixed scroll; a drive shaft driving the orbiting scroll; and a backside plate provided between the drive shaft and the orbiting scroll, an alignment hole being provided in each of the orbiting scroll and the backside plate, and an alignment pin for alignment and a seal member for sealing the compression chambers being provided in the alignment holes.