Compressor Head Fastening Structure for Sealing Without Cylinder Deformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fastening solutions for refrigeration compressor heads to cylinders require high fastening forces, leading to deformation and increased manufacturing costs due to precision requirements and complex component alignment.
Innovation Solution
A fastening arrangement featuring a supporting device with arched format and spare contact regions that distributes fastening forces across specific points, reducing deformation and component complexity, utilizing fewer screws and less precise machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional screw fastening is used to ensure gasket sealing, then sealing reliability is improved, but high fastening forces cause cylinder wall deformation
Solution Approach 1:
The fastening function is segmented between the screws (which provide the fastening force) and the supporting device with contact regions (which distributes the force). The supporting device divides the force transmission path, preventing direct concentration of screw forces on the cylinder wall while maintaining sealing pressure.
Solution Approach 2:
The supporting device acts as an intermediary between the screws and the cylinder wall. It receives the fastening forces from the screws through its contact regions and distributes them, preventing direct transmission of concentrated forces to the cylinder wall while still ensuring gasket sealing.
2Reliability
If indexing holes and threaded holes are made for screw alignment and fastening, then fastening reliability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The alignment function is extracted from the screw holes and transferred to the supporting device. The supporting device incorporates indexing features that perform the alignment function independently, allowing the screw holes to be simpler and reducing the overall complexity of the fastening system.
Solution Approach 2:
The supporting device merges multiple functions into a single component: it provides structural support, force distribution through contact regions, and alignment through indexing features. This consolidation reduces the number of separate components and simplifies the overall fastening system.
3Manufacturing precision
If high precision position tolerances are applied to holes, then fastening accuracy is improved, but manufacturing time and cost increase
Solution Approach 1:
The supporting device is pre-formed with integrated indexing features that establish alignment before the screws are installed. This preliminary alignment action eliminates the need for high-precision hole positioning during assembly, allowing for faster manufacturing with relaxed tolerances.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention belongs to the technological field of the head fastening and its components to the block of a compressor, such as those used in cooling systems of household appliances. The head fastening arrangement of cooling compressor comprises: a head arranged by the cylinder (3) of the cooling compressor and having a head lid (2); at least one supporting device (4) also arranged by the cylinder (3); at least one element of union (6) of the head lid (2) to the supporting device (4), wherein the element of union (6) is capable of transmitting force that presses the head lid (2) and the supporting device (4) against the cylinder (3).