Scroll Compressor Oil Separating Drive Shaft
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Solution Overview
Problem
Conventional scroll compressors inefficiently separate oil from coolant gas, especially at high rotational speeds, leading to decreased compressor efficiency and inability to effectively cope with thermal loads.
Innovation Solution
A scroll compressor with an oil separating drive shaft featuring a discharge passage within the drive shaft that is inclined from the axis to the outside, allowing centrifugal separation of oil from coolant, and lubrication holes at arbitrary points for proper lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fixed oil separating plate is used, then oil separation is possible at low rotational speeds, but oil separation efficiency decreases at high rotational speeds
Solution Approach 1:
The patent replaces the fixed oil separating plate with a rotating oil separating plate that rotates together with the drive shaft. This dynamic structure allows the oil separating plate to maintain effective separation capability across varying rotational speeds by utilizing centrifugal force generated during rotation, thereby resolving the contradiction between maintaining reliable oil separation and operating at high speeds.
Solution Approach 2:
The patent changes the operational parameters of the oil separating plate from static to rotating, and introduces an oil separation control mechanism that can adjust the rotation speed of the oil separating plate independently from the drive shaft. This parameter adjustment capability allows optimization of oil separation efficiency under different operating conditions, resolving the contradiction between speed and separation efficiency.
2Productivity
If the drive shaft rotates at high speed to handle thermal loads, then compressor capacity increases, but oil separation becomes insufficient
Solution Approach 1:
The rotating oil separating plate coupled with the drive shaft ensures that oil separation functionality is maintained during high-speed operation. The independent oil separation control mechanism further allows the system to optimize separation performance even when the drive shaft operates at high speeds for increased compressor capacity, thus resolving the contradiction between productivity and reliability.
Solution Approach 2:
The oil separation control mechanism monitors the operational state and adjusts the rotation speed of the oil separating plate accordingly. This feedback control ensures that adequate oil separation is maintained regardless of the drive shaft's rotational speed, allowing the compressor to operate at high capacity while maintaining reliable oil separation.
3Reliability
If oil supply passages are provided in the drive shaft, then lubrication is ensured, but the drive shaft structure becomes complex
Solution Approach 1:
The patent combines the oil supply function with the rotating oil separating plate by forming oil supply passages directly in the plate structure. This integration eliminates the need for separate oil supply mechanisms in the drive shaft, maintaining effective lubrication while simplifying the overall drive shaft structure and resolving the contradiction between reliability and device complexity.
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
Efficient separation of oil from coolant gas improves compressor efficiency and allows the compressor to handle thermal loads better, with effective lubrication of the drive shaft.
Implementation Method 1
a discharge passage passes through the interior of the drive shaft lengthwisely to circulate the coolant discharged from the discharge opening, at least one section of the discharge passage is inclined from the axis of the drive shaft to the outside as it goes from the rear side to the front side
Data Source
AI summary
The present invention relates to a scroll compressor, with an oil-separating drive shaft, that comprises a housing a fixed scroll which is installed inside the housing, a orbiting scroll which orbits around the fixed scroll, and a drive shaft which drives the orbiting scroll. In the orbiting scroll, a discharge hole is formed. A discharge path is formed along the longitudinal direction of the drive shaft so that discharged coolant from the discharge hole flows therethrough. At least, a part of the discharge path is inclined forward from the rotary axis to the exterior. A lubrication hole is formed in the drive shaft that penetrates from the discharge path to the outer surface of the drive shaft.