Scroll compressor having gap between tip spiral scroll wrap to end plate of fixed and orbiting scrolls that differs in axial length from gap between support of oldham ring and end plate of orbiting scroll
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Solution Overview
Problem
In scroll compressors, the adjustment mechanisms to prevent the orbiting scroll from tilting due to overturning moments reduce the rigidity of the scroll, leading to potential damage and leakage, and existing solutions require complex configurations that alter the essential parts of the compression mechanism.
Innovation Solution
A scroll compressor design that includes an Oldham ring between the orbiting scroll and a frame, with specific gap dimensions that prevent excessive tilt, allowing the orbiting scroll to orbit without rotating, thus maintaining the rigidity of the essential parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an adjustment mechanism (oil groove and oil guide path) is provided in the orbiting scroll to produce anti-overturning moment, then the tilt of the orbiting scroll is reduced, but the rigidity of the orbiting scroll is reduced
Solution Approach 1:
The patent introduces an Oldham ring as an intermediary component between the orbiting scroll and the frame. This mediator provides the anti-overturning support function without modifying the orbiting scroll itself, thus maintaining the scroll's rigidity while still preventing excessive tilt through the gap-controlled support mechanism.
2Stability of the object's composition
If the adjustment mechanism is provided in the orbiting scroll, then the overturning moment is reduced, but the structure of essential parts (orbiting scroll and fixed scroll) is altered
Solution Approach 1:
The patent separates the anti-overturning function from the essential compression components (orbiting and fixed scrolls). By implementing the tilt prevention function in a separate Oldham ring component rather than integrating it into the scrolls, the essential parts maintain their simple, essential structures while the system as a whole achieves overturning moment control.
3Stability of the object's composition
If the gap between the support of Oldham ring and end plate of orbiting scroll is made small to prevent tilt, then the orbiting scroll stability is improved, but the risk of contact and damage between spiral element tips and end plates increases
Solution Approach 1:
The patent carefully controls the dimensional parameters of the gaps involved. By setting the gap δ2 between the Oldham ring support and orbiting scroll end plate to be smaller than the gaps δ1 between spiral element tips and opposite end plates, the system ensures that the orbiting scroll contacts the support before the spiral tips contact the end plates, preventing damage while maintaining stability.
Data Source
AI summary
A scroll compressor includes an orbiting scroll including an end plate and a spiral element on the end plate, a fixed scroll including an end plate and a spiral element on the end plate, and an Oldham ring including a support. The scroll compressor satisfies a relation of δ1>δ2, where δ1 denotes each of the axial length of a gap between the tip of the spiral element of the orbiting scroll and the end plate of the fixed scroll and a gap between the tip of the spiral element of the fixed scroll and the end plate of the orbiting scroll, and δ2 denotes the axial length of a gap between the end plate of the orbiting scroll and the support of the Oldham ring.