Scroll Compressor Oil Pump Friction Reduction
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Solution Overview
Problem
In scroll compressors, frictional heat generated during operation causes refrigerant evaporation in oil passages, leading to bubble congestion and reduced lubrication effectiveness, which degrades performance and shortens the compressor's lifespan due to inadequate lubrication of moving parts.
Innovation Solution
The implementation of a friction reducing plate and a gear unit with formed chambers in the oil pump, along with a filter member, to minimize friction heat, prevent refrigerant evaporation, and ensure smooth oil flow, thereby stabilizing oil supply and reducing foreign element interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction is reduced in the oil pump, then refrigerant evaporation is prevented and oil supply stability is improved, but device complexity increases due to additional components
Solution Approach 1:
A friction reducing plate is introduced as an intermediary component between the driving shaft and pump body. This plate reduces frictional heat generation, preventing refrigerant evaporation and bubble formation, thereby stabilizing oil supply without requiring complex control systems
Solution Approach 2:
The pump interior space is segmented into multiple independent chambers using partition walls. This segmentation prevents bubble congestion from affecting the entire pump system, isolating issues to specific chambers and maintaining stable oil supply from unaffected chambers
2Adaptability or versatility
If the pump processes both oil and refrigerant, then lubrication and cooling functions are integrated, but harmful effects increase due to refrigerant evaporation and bubble congestion
Solution Approach 1:
The friction reducing plate serves as a mediator that reduces frictional heat at its interface with the driving shaft. This prevents the heat from causing refrigerant evaporation, allowing the pump to handle both oil and refrigerant without the harmful evaporation effect
Solution Approach 2:
Partition walls divide the pump interior into multiple chambers, segmenting the refrigerant-oil mixture flow paths. This prevents bubble congestion in one chamber from affecting other chambers, enabling stable processing of both fluids simultaneously
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 enhances the compressor's performance by preventing irregular oil supply, reducing friction heat, and ensuring effective lubrication of moving parts, thus improving the compressor's capacity and reliability.
Implementation Method 1
a friction reducing member placed on the driving shaft insertion groove and reducing the friction between the driving shaft and pump body
Implementation Method 2
a filter member assembled on the lower side of the pump cover and filtering the foreign elements in the oil
Data Source
AI summary
An oil pump for a compressor includes a driving shaft having an oil passage, a gear driving unit coupled to the drive shaft, a pump body having a driving shaft insertion groove, a friction reducing member assembled on the driving shaft insertion groove to reduce friction between the driving shaft and pump body, and a a gear unit coupled to the pump body and rotating with rotation of the driving shaft. The pump may further include a pump cover coupled to the pump body and having an intake for inhaling oil.