Scroll Compressor Eccentric Oil Path Rotor Strength
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Solution Overview
Problem
The existing scroll-type compressors face issues with the weakening of the rotor due to multiple oil descent holes, limited magnetic resistance, and potential damage from deformation or abrasive forces, which can lead to improper functioning and increased oil circulation rates.
Innovation Solution
The implementation of an eccentric oil supply path on the driving shaft, combined with a balance member and an oil cap, reduces the need for holes on the rotor, minimizes oil discharge, and enhances centrifugal force for efficient oil circulation, thereby stabilizing the rotor and improving magnetic resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple oil descent holes are formed on the rotor to supply oil for lubrication, then oil circulation is improved, but the rotor strength is weakened
Solution Approach 1:
The oil supply system is segmented into multiple independent pathways: oil descent holes in the rotor, additional oil supply holes in the driving shaft, and oil supply grooves. This segmentation allows oil to reach different areas through multiple routes, ensuring adequate lubrication without requiring excessive holes in the rotor alone, thereby preserving rotor strength.
Solution Approach 2:
The driving shaft acts as an intermediary component that introduces additional oil supply pathways independent of the rotor structure. By forming oil supply holes and grooves in the driving shaft, the system provides alternative routes for oil delivery, reducing the burden on the rotor's oil descent holes and maintaining rotor integrity.
2Temperature
If oil descent holes are formed on the rotor to cool the motor, then motor cooling is improved, but magnetic resistance is reduced
Solution Approach 1:
The driving shaft serves as an intermediary that provides dedicated oil supply pathways (oil supply holes and grooves) to deliver oil to the motor for cooling. This separates the cooling function from the rotor structure, allowing effective motor cooling through the driving shaft's oil supply system without compromising the rotor's magnetic resistance.
Solution Approach 2:
The cooling oil supply is segmented into distinct pathways: oil descent holes in the rotor for basic cooling, and additional oil supply holes and grooves in the driving shaft for enhanced cooling. This segmented approach ensures adequate motor cooling while minimizing the number and size of holes required in the rotor, thereby preserving magnetic resistance.
3Reliability
If conventional oil supply paths are used, then oil circulation is maintained, but oil mixing with refrigerant increases
Solution Approach 1:
The system utilizes dynamic centrifugal force generated by the rotating driving shaft to control oil flow. The oil supply grooves in the driving shaft and the centrifugal action dynamically direct oil flow along specific pathways, preventing oil from mixing with the refrigerant gas and reducing oil discharge while maintaining effective oil circulation throughout the compressor.
Solution Approach 2:
The system employs hydraulic principles by utilizing the flow characteristics of oil under centrifugal force. The oil supply grooves and holes are designed to leverage oil pressure and flow dynamics to deliver oil to lubrication points without allowing oil to escape into the refrigerant stream, thereby reducing oil loss while maintaining circulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the amount of oil discharged, minimizes mixing with refrigerant, enhances the compressor's capacity, and prevents component abrasion and overheating, while maintaining rotor strength and magnetic resistance.
Implementation Method 1
the driving shaft, and the oil supply path located eccentrically in an inner part of the driving shaft... enhances centrifugal force for efficient oil circulation
Data Source
AI summary
A scroll-type compressor includes a compression unit, a main frame supporting the compression unit, and a driving shaft having an oil supply path. The oil supply path is located eccentrically with the driving shaft and an upper part of the driving shaft is supported by the main frame. The compressor also has a motor for rotating the driving shaft, an oil cap located on an upper side of a rotor of the motor, and a balance member to compensate the driving shaft.