Mutual Rotating Scroll Compressor Eccentric Hinge Lug Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mutual rotating scroll compressors face challenges with increased manufacturing costs, frictional losses, and reduced compression efficiency due to complex support configurations and enlarged bearing parts, which lead to refrigerant leakage and suction losses.
Innovation Solution
A simplified support configuration for the driving scroll, reduced diameter of the bearing part, and a back pressure chamber design with a smaller internal diameter to minimize frictional losses, along with an eccentric hinge lug to maintain close adhesion of scroll wraps and an integrated oil separation mechanism to prevent oil leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a complex support configuration with enlarged bearing parts is used to support both ends of the driving scroll, then the structural stability is improved, but the manufacturing cost increases and frictional losses increase
Solution Approach 1:
The support function is segmented between the bearing part supporting the rotational center and the back pressure plate supporting the rear surface, allowing each component to be optimized independently for its specific function
Solution Approach 2:
The back pressure plate is extracted as a separate component that serves dual functions: supporting the driven scroll rear surface and providing structural stability, thereby reducing the complexity of the main bearing structure
2Stability of the object's composition
If a complex support configuration with enlarged bearing parts is used to support both ends of the driving scroll, then the structural stability is improved, but the frictional losses increase
Solution Approach 1:
The support function is segmented between the bearing part supporting the rotational center and the back pressure plate supporting the rear surface, allowing each component to be optimized independently for its specific function
Solution Approach 2:
The back pressure plate provides structural support through pressure distribution rather than through large-scale bearing surfaces, reducing frictional contact area and associated energy losses
3Stability of the object's composition
If the internal diameter of the back pressure chamber is enlarged to support the driven scroll, then the structural stability is improved, but the compression efficiency decreases due to refrigerant leakage
Solution Approach 1:
The back pressure plate acts as an intermediary component that distributes pressure across the driven scroll rear surface, providing structural stability without requiring an enlarged back pressure chamber internal diameter
Solution Approach 2:
The back pressure plate functions as a flexible pressure distribution element that maintains structural stability while preserving the compact chamber geometry needed for efficient compression
4Stability of the object's composition
If the internal diameter of the back pressure chamber is enlarged to support the driven scroll, then the structural stability is improved, but manufacturing costs increase
Solution Approach 1:
The back pressure plate acts as an intermediary component that distributes pressure across the driven scroll rear surface, providing structural stability without requiring an enlarged back pressure chamber internal diameter
Solution Approach 2:
The back pressure plate provides structural support through pressure distribution rather than through large-scale bearing surfaces, reducing frictional contact area and associated energy losses
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
The solution reduces manufacturing costs, minimizes frictional losses, enhances compression efficiency by preventing refrigerant leakage, and ensures effective oil separation, thereby improving the overall performance of the scroll compressor.
Implementation Method 1
a hinge lug which extends from the housing part and is movably coupled to the second frame, wherein in the bearing housing, a third center which is a center of the hinge lug in an axial direction is provided on a plane and is eccentric with respect to a second center which is a center of the boss accommodation part in an axial direction
Implementation Method 2
a driven scroll engaged with the driving scroll to rotate about the second frame
Implementation Method 3
the mutual rotating scroll compressors have a structure where a driving scroll and a driven scroll rotate in the same direction and rotate about a center of rotation thereof where rotational shafts are differently located, but do not perform a turning movement. Therefore, the problem of a centrifugal force occurring in the swirl scroll compressors due to the principle does not occur in the mutual rotating scroll compressors
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A mutual rotating scroll compressor is provide. The mutual rotating scroll compressor includes: a first frame (31) fixed to a casing; a second frame (32) provided with an interval between the first frame and the second frame, a compression space (30a) being provided between the first frame and the second frame; a first scroll (33) rotatably supported by the first frame and coupled to a driving motor (20) to rotate in the compression space; a second scroll (34) engaged with the first scroll to rotate about the second frame, the second scroll and the first scroll forming a compression chamber (V) in the compression space; and a bearing housing (37) including a housing part (371), including a boss accommodation part (372) to which the second scroll is rotatably coupled, and a hinge lug (375) which extends from the housing part and is movably coupled to the second frame. In the bearing housing, a third center which is a center of the hinge lug in an axial direction is provided on a plane and is eccentric with respect to a second center which is a center of the boss accommodation part in an axial direction, and each of the second center and the third center is provided on a plane and are eccentric with respect to a first center of the first scroll in an axial direction.