Co-Rotating Scroll End Plate Structure for Tilt Load Relief
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Solution Overview
Problem
The driven scroll in co-rotating scroll compressors is prone to tilting due to tilting moments generated by the reaction force of compressed fluid, leading to increased load and potential damage to the driving and driven scroll bodies, reducing the compressor's durability.
Innovation Solution
The design includes a driving scroll with a cover body and a driven scroll end plate that can rotate between the driving scroll peripheral wall and a cover body, forming gaps to prevent direct contact between the scroll bodies, thereby supporting the tilting moment without increasing load on the scroll bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driven scroll is allowed to rotate freely to reduce friction and wear, then the operational smoothness improves, but the driven scroll tilts due to reaction forces causing increased load on scroll bodies
Solution Approach 1:
A tilting moment counteracting mechanism is introduced as an intermediary system between the driven scroll and the scroll bodies. This mechanism includes a tilting moment detector that senses the tilt caused by reaction forces, and a counteracting actuator that applies compensating forces to prevent excessive tilting. This intermediary system allows the driven scroll to rotate smoothly while preventing the harmful tilting that would otherwise increase load on the scroll bodies and reduce durability.
2Reliability
If the driven scroll is constrained to prevent tilting, then the durability improves, but the friction and wear increase
Solution Approach 1:
The constraint system is made dynamic rather than static. The tilting moment counteracting mechanism continuously adjusts the constraining forces based on real-time detection of tilting moments. When tilting moments are low, the constraint is relaxed to allow smooth rotation; when tilting moments increase, the constraint strengthens to prevent damage. This dynamic adjustment resolves the contradiction by providing just enough constraint to ensure durability while minimizing interference with smooth operation.
3Reliability
If the scroll bodies are made stronger to withstand tilting loads, then the durability improves, but the manufacturing complexity and cost increase
Solution Approach 1:
Instead of designing scroll bodies to withstand extreme tilting loads, the system预先 (in advance) detects tilting moments and counteracts them before they can cause damage. The tilting moment detector and counteracting mechanism prevent excessive loads from developing in the first place, allowing the scroll bodies to be designed with standard, easier-to-manufacture materials and geometries while still achieving high durability through the protective mechanism.
Data Source
AI summary
A co-rotating scroll compressor includes a driving scroll and a driven scroll. The driving scroll has: a driving scroll end plate; a driving scroll peripheral wall; a driving scroll body; and a cover body. The driven scroll has: a driven scroll end plate rotatably disposed between the driving scroll peripheral wall and the cover body; and a driven scroll body. The driven scroll end plate is contactable with the driving scroll peripheral wall. When the driven scroll end plate is in contact with the driving scroll peripheral wall, a gap is formed between the driven scroll body and the driving scroll end plate and a gap is formed between the driving scroll body and the driven scroll end plate to prevent the driven scroll body and the driving scroll body from coming into contact with the driving scroll end plate and the driven scroll end plate, respectively.