Scroll Compressor Differential Pressure Oil Supply Path
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing scroll compressors face challenges in smoothly supplying oil during low pressure ratio operation, leading to inefficiencies and reliability issues due to excessive oil supply variations and backward flow, especially when the compression unit is driven at low speed or high pressure ratios.
Innovation Solution
The introduction of a differential pressure oil supply structure with an additional oil supply path that opens only during low pressure ratio operation, combined with a valve structure based on spring resilience to control oil supply, ensures stable oil delivery by adjusting the oil supply path's location and timing to maintain efficient operation across varying pressure conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional oil supply path is used in the compression unit, then oil can be supplied during high pressure ratio operation, but oil supply becomes unstable and excessive during low pressure ratio operation
Solution Approach 1:
The oil supply system is divided into multiple independent paths: a first oil supply path for high pressure ratio operation and a second oil supply path for low pressure ratio operation. Each path is activated based on operating conditions, allowing stable oil supply across varying pressure ratios without excessive oil supply during low pressure ratio operation.
Solution Approach 2:
The oil supply system dynamically switches between different supply paths based on real-time pressure ratio conditions. A valve mechanism opens or closes specific paths according to operating conditions, enabling the system to adapt oil supply characteristics to match varying pressure ratio requirements and maintain optimal performance.
2Device complexity
If the compression unit is positioned close to the discharge outlet, then the structure is compact, but oil supply becomes difficult and requires additional support structures
Solution Approach 1:
The oil supply paths are routed through multiple spatial dimensions and components, utilizing the rotary shaft and case structure to deliver oil to the compression unit. This multi-dimensional routing enables oil supply to reach the compactly positioned compression unit without requiring additional external support structures.
3Stability of the object's composition
If the rotary shaft is positioned to support the compression unit, then the structure is stable, but the gas power action point does not match the repulsive force, causing scroll tilting
Solution Approach 1:
The system introduces a counterbalancing mechanism that offsets the mismatch between gas power action points and repulsive forces. This counterweight mechanism prevents scroll tilting by balancing the forces acting on the compression unit, thereby maintaining both structural stability and operational reliability.
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 solution enables smooth oil supply and maintains efficiency and reliability even at low pressure ratios, preventing oil supply variations and backward flow, thus ensuring stable compressor performance across different operational conditions.
Implementation Method 1
a valve structure based on spring resilience to control oil supply
Implementation Method 2
an additional oil supply path that opens only during low pressure ratio operation
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
A scroll compressor is disclosed, which may provide an oil supply path opened only in case of driving of a low pressure ratio to improve a differential pressure oil supply structure which may have a defect in oil supply in case of driving of the low pressure ratio.