Scroll Compressor Assembly With Stable Rotor-Stator Gap
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Solution Overview
Problem
Existing scroll compressors face challenges in maintaining an ideal gap between the rotor and stator, particularly when using axial flux motors, which results in operational inefficiencies and difficulty in achieving a compact structure.
Innovation Solution
A compressor design incorporating an axial flux motor with a retainer and driving mechanism that maintains a gap between the rotor and stator through a threaded connection and rolling bearings, allowing for a compact and efficient structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a motor with stator and rotor is used in the scroll compressor, then the compressor can achieve high-speed rotation and improved productivity, but it becomes difficult to maintain an ideal gap between the rotor and stator, leading to operational reliability issues
Solution Approach 1:
The patent introduces a dedicated gap maintenance mechanism consisting of a support component with a support surface that physically maintains the gap between the rotor and stator. This intermediary structure resolves the contradiction by providing a reliable mechanical means to preserve the critical gap while allowing high-speed rotation to continue.
Solution Approach 2:
The patent transforms the gap maintenance from a passive design parameter to an actively controlled parameter through the support mechanism. By changing the structural configuration to include adjustable or fixed support surfaces, the gap distance is maintained within ideal ranges despite high-speed operational dynamics.
2Device complexity
If traditional motor structures are used in scroll compressors, then the design is simpler, but the compressor cannot achieve a compact and lightweight structure
Solution Approach 1:
The patent merges the motor assembly with the scroll compressor housing by integrating the stator, rotor, and gap maintenance support into a unified structure. The support component is positioned within the housing to directly maintain the rotor-stator gap, eliminating the need for separate external support structures and reducing overall compressor weight while maintaining structural simplicity.
3Volume of moving object
If the rotor is positioned close to the stator for compact design, then the compressor achieves a compact structure, but the gap becomes unstable and affects operational reliability
Solution Approach 1:
The support component acts as an intermediary element that enables the rotor to be positioned close to the stator for compact design while simultaneously providing a stable reference surface that maintains the critical gap. This mediator structure resolves the contradiction by decoupling the compact positioning from the gap stability requirements.
Solution Approach 2:
The patent implements preliminary gap establishment through the support structure during assembly, ensuring the ideal gap is set before operation begins. The support surface pre-positions the rotor at the correct distance from the stator, preventing gap instability during high-speed operation while maintaining compact dimensions.
Data Source
AI summary
A compressor includes a housing; a first scroll and a second scroll located inside the housing, the first scroll being configured to have a first end plate and a first volute extending from the first end plate towards the second scroll, the second scroll being configured to have a second end plate and a second volute extending from the second end plate towards the first scroll, the first volute and the second volute being configured to engage with each other so as to define a compression chamber therebetween; a motor including a stator and a rotor, which is located on one side of the second scroll away from the first scroll and configured for driving the first scroll to rotate by the rotor so as to drive the second scroll to rotate; a driving mechanism including a receiving hub and a flange configured to extend radially from a first end of the receiving hub and support the second end plate; wherein a second end of the receiving hub is secured to the rotor so as to position the rotor to be spaced from the stator with a certain gap between the rotor and the stator.