Scroll Compressor Tip Seal Inclined Wall Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stepped scroll compressors experience significant fluid leakage and reduced strength at the step, with challenges in effectively installing tip seals to achieve desired performance due to the inclined portions on the scroll walls.
Innovation Solution
A scroll compressor design featuring an inclined portion on the scroll walls with a tip seal in groove portions, where the tip seal's inclination height is smaller than the wall's, allowing it to protrude more on the inner periphery during operation for enhanced sealing, and made of an elastically deformable material for ease of installation and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a stepped scroll compressor with steps on the scroll walls is used to achieve three-dimensional compression and larger displacement, then compressor capacity is improved, but fluid leakage at the step increases and strength at the root portion of the step is reduced
Solution Approach 1:
The scroll wall is divided into two functional zones: an inclined portion for compression and a flat portion for structural support and seal mounting. This segmentation allows the inclined portion to provide three-dimensional compression effect while the flat portion maintains structural integrity and provides a stable mounting surface for seals, thereby resolving the contradiction between compression performance and structural strength.
Solution Approach 2:
The invention transitions from a stepped (vertical) configuration to an inclined (slanted) configuration for the compression portion. This dimensional change allows the seal to be mounted on a flat portion that is separate from the compression zone, enabling the seal to effectively block fluid leakage paths while the inclined portion maintains compression capability without compromising structural strength.
2Productivity
If an inclined portion is formed on the scroll wall to enable three-dimensional compression, then compressor performance is improved, but the method of installing the tip seal to achieve desired performance becomes uncertain
Solution Approach 1:
The scroll wall is segmented into an inclined portion for compression and a flat portion for seal mounting. This clear functional division provides a stable, flat mounting surface for the tip seal, making installation straightforward and predictable, while the inclined portion maintains the three-dimensional compression effect for improved compressor performance.
Solution Approach 2:
The flat portion acts as an intermediary between the inclined compression portion and the tip seal. It provides a stable mounting platform that facilitates easy seal installation while being structurally connected to the inclined portion, thus mediating between the performance requirements of compression and the manufacturing requirements of seal installation.
3Reliability
If a tip seal is provided in the tooth crest to seal the gap between tooth crest and opposing tooth base, then sealing performance is improved, but proper installation method on inclined walls is not established
Solution Approach 1:
The scroll wall is divided into an inclined portion for compression and a flat portion for seal mounting. This segmentation provides a stable, flat mounting surface for the tip seal, making installation straightforward and predictable, while the inclined portion maintains the three-dimensional compression effect for improved compressor performance.
Solution Approach 2:
Different portions of the scroll wall are given different geometric properties: the inclined portion has a slanted surface optimized for compression, while the flat portion has a horizontal surface optimized for seal mounting. This local differentiation allows each zone to perform its specific function optimally, with the flat portion providing easy seal installation and the inclined portion providing effective compression.
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 design achieves high sealing performance by ensuring the tip seal is pressed against the tooth base with higher fluid pressure on the inner periphery, reducing leakage and improving the compressor's efficiency while being easier to manufacture and inspect.
Implementation Method 1
a tip seal is provided in groove portions formed in tooth crests of the first wall and the second wall corresponding to the inclined portion, the tip seal being configured to make contact with a tooth base facing the tip seal to perform sealing against fluid
Data Source
AI summary
Provided is a scroll fluid machine capable of effectively achieving performance of a tip seal installed in a tooth crest of a wall including an inclined portion. The inclined portion in which a distance between opposing surfaces of end plates facing each other gradually decreases from an outer peripheral side toward an inner peripheral side is provided. A tip seal (7) configured to make contact with a tooth base facing the tip seal (7) to perform sealing against fluid is provided in tip seal groove (3d) formed in a tooth crest of a wall (3b) corresponding to the inclined portion. In a stop state where a scroll (3) does not perform compression of fluid, an inclination height (Ls′) of the tip seal (7) is smaller than an inclination height (Ls) of the wall (3b).