Scroll Machine Drive Shaft Cooling and Lubrication
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Solution Overview
Problem
Existing scroll machines and refrigeration systems require continuous cooling and lubrication to achieve the required service life, which is inefficient and complex.
Innovation Solution
The drive shaft of the scroll machine is used as a line for the medium, allowing for integrated cooling and lubrication of components with low pressure loss, utilizing a hollow shaft portion and radial bores to guide the medium through the machine housing, and incorporating axial openings and grooves for extensive cooling and lubrication of bearings and rotors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous cooling and lubrication systems are added to scroll machines, then service life is improved, but device complexity increases
Solution Approach 1:
The patent combines the cooling and lubrication functions into a single integrated system using the drive shaft as a common conduit. The drive shaft serves dual purposes: transmitting rotational motion to the spiral unit and delivering both cooling medium and lubricant to various components through radially arranged openings and channels.
Solution Approach 2:
The drive shaft is designed as a multi-functional component that simultaneously performs mechanical drive, cooling, and lubrication delivery functions. By incorporating radial openings and internal channels in the drive shaft, a single component accomplishes multiple tasks that would traditionally require separate systems.
2Reliability
If separate cooling and lubrication lines are used, then component lubrication is improved, but pressure loss increases
Solution Approach 1:
The cooling medium and lubricant are delivered through a single integrated drive shaft system rather than separate lines. This consolidation reduces the total number of flow paths and connection points, thereby minimizing pressure losses while ensuring both cooling and lubrication functions are met.
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 provides a compact scroll machine with efficient cooling and lubrication, reducing pressure loss and enhancing the service life of components while maintaining operational efficiency.
Implementation Method 1
The drive shaft has a hollow shaft portion and at least one radial bore, which opens into the hollow shaft portion and connects the hollow shaft portion to an outer lateral surface of the drive shaft
Implementation Method 2
The drive unit has at least one axial opening and/or at least one axial groove, and for the at least one axial opening and/or the at least an axial groove to define a flow path for the medium
Implementation Method 3
The drive shaft of the scroll machine is used as a line for the medium, allowing for integrated cooling and lubrication of components
Data Source
AI summary
A scroll machine for a medium has a machine housing having a longitudinal axis and an inlet and an outlet for the medium. Provided in the machine housing along the longitudinal axis is: a drive unit having a drive shaft mounted on the machine housing by a first bearing unit and a second bearing unit, a first spiral unit having a spiral channel formed by a first spiral rib and has an inner end region and an outer end region, and a second spiral unit having a spiral channel formed by a second spiral rib and has an inner end region and an outer end region. The first spiral unit and the second spiral unit engage one another to form pressure chambers, wherein the first spiral unit can be moved by means of the drive shaft through the drive unit along an orbital path relative to the second spiral unit.