Scroll Compressor Oil Chamber Radial Placement
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Solution Overview
Problem
Existing scroll compressors with oil lubrication for the central bearing face insufficient lubrication due to ineffective oil circulation, leading to premature deterioration and frequent maintenance needs, as the splashed-up oil does not circulate adequately, especially in the hot central region of the rotor.
Innovation Solution
A scroll compressor design featuring an oil chamber located at a radial distance from the rotor's center, connected to the central bearing via a narrower oil channel, with an oil catcher mechanism to ensure consistent oil flow and cooling, allowing the oil chamber to be situated in a cooler area for better lubrication and reduced heat absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If grease is used to lubricate the central bearing, then the lubrication is simple to implement, but the rotor speed is limited and the service interval is short
Solution Approach 1:
The patent changes the lubrication parameter from grease to oil, which fundamentally alters the lubrication characteristics. Oil allows for higher rotor speeds and extended service intervals compared to grease, while maintaining effective lubrication of the central bearing through the oil chamber and oil channel system.
2Productivity
If oil is used to lubricate the central bearing, then higher rotor speeds are allowed and service intervals are extended, but the oil circulation becomes insufficient in the hot central region
Solution Approach 1:
The patent segments the oil delivery system into distinct components: an oil chamber positioned in the cooler outer region, an oil channel extending to the central bearing, and an oil catcher mechanism. This segmentation allows the oil to be delivered effectively to the central bearing while the main oil chamber remains in a cooler region, preventing premature oil deterioration.
Solution Approach 2:
The oil channel acts as an intermediary element that transports oil from the cooler outer region (oil chamber) to the hot central bearing region. This intermediary structure enables effective lubrication of the central bearing while keeping the bulk of the oil in a cooler environment, thus maintaining lubrication reliability.
3Ease of operation
If the oil chamber is positioned near the center of the rotor, then the oil is closer to the central bearing, but the oil heats up prematurely and deteriorates
Solution Approach 1:
The patent applies local quality by positioning the oil chamber in a specific location (outer cooler region) rather than uniformly distributing oil throughout the rotor. This localized placement ensures that the majority of the oil remains in a cooler environment, preventing premature heating and deterioration, while still enabling effective delivery to the central bearing through the oil channel.
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 design enhances lubrication efficiency by maintaining sufficient oil flow to the central bearing, reducing the risk of premature deterioration and extending service intervals, as the oil chamber is cooler and better ventilated, improving the compressor's performance and longevity.
Implementation Method 1
upon the movement of the rotor a part of the oil is raised in order to lubricate the central bearing
Implementation Method 2
the oil chamber is connected to the central bearing by a narrower oil channel
Implementation Method 3
cooling air is blown along the outside of the oil chamber by means of a fan or similar
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Scroll compressor comprising a housing (2) with a fixed stator; a movable rotor (8); and a crankshaft (9) that has a main shaft (14) and a secondary shaft (16) that is mounted on bearings in the centre of the rotor (8) through the intervention of a bearing (17); whereby the rotor (8) is provided with an oil chamber (36) filled with oil (46) such that upon the movement of the rotor (8) the oil (46) is raised in order to lubricate the bearing (IV), characterised in that the oil chamber (36) is at a radial distance (A) from the centre of the rotor (8) and is connected to the bearing (17) by a narrower oil channel (37).