Rotary Machine Positioning Device Liner Groove Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing positioning device for rotary machines requires separate manufacturing or preparation of multiple liners with different gap dimensions, leading to increased manufacturing costs due to the need for bolt head receiving recesses and screw insertion holes.
Innovation Solution
A positioning device that includes a pin with a groove insertion portion and a liner holder with engaging portions, eliminating the need for bolt head receiving recesses, allowing for the use of liners with different thicknesses and reducing manufacturing costs by simplifying the design and preventing liner contact with fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a liner is used to position the inner member relative to the outer member, then positioning accuracy is improved, but manufacturing cost increases due to the need for separate manufacturing of liners with different gap dimensions
Solution Approach 1:
The liner is divided into a liner body and a separate gasket. The gasket is inserted into a groove on the liner body, allowing the gap dimension to be adjusted by changing the gasket thickness rather than manufacturing completely different liners. This segmentation enables cost-effective production of liners with different gap dimensions.
Solution Approach 2:
The gasket is nested within the liner body structure, specifically inserted into a groove formed on the liner body. This nested configuration allows the gasket to provide the necessary gap adjustment while being contained within the liner assembly, reducing the need for separate manufacturing of entirely different liner components.
2Strength
If bolt head receiving recesses and screw insertion holes are formed in the liner, then the liner can be fixed to the pin, but device complexity and manufacturing cost increase
Solution Approach 1:
The fixing features (bolt head receiving recesses and screw insertion holes) are extracted from the liner body and relocated to the pin. The pin now carries these fixing features, while the liner simply fits onto the pin. This extraction simplifies the liner structure and reduces manufacturing complexity while maintaining the necessary fixing strength.
Solution Approach 2:
Instead of forming fixing features in the liner, the invention inverts the approach by providing the fixing features on the pin itself. The liner becomes a simpler component that fits onto the structured pin, reversing the traditional design where the liner would contain all the fixing mechanisms.
3Adaptability or versatility
If multiple liners with different gap dimensions are prepared in advance, then positioning flexibility is improved, but manufacturing cost and inventory complexity increase
Solution Approach 1:
The gap dimension adjustment is segmented into the gasket component rather than requiring different liner variants. By producing gaskets in different thicknesses and inserting them into the same liner body groove, the system achieves positioning flexibility without needing to manufacture and inventory multiple liner types.
Solution Approach 2:
A single liner body design with a groove can accommodate gaskets of various thicknesses, making the liner universal for different gap requirements. This multi-functionality allows the same liner structure to serve multiple positioning needs by simply changing the gasket, reducing the number of liner variants that need to be manufactured and stored.
Data Source
AI summary
A pin insertion hole penetrating an outer member from an outer circumferential side to an inner circumferential side is formed in the outer member. A pin groove that is concave from an outer circumferential side to an inner circumferential side is formed in an inner member. A positioning device includes a pin that is inserted into the pin insertion hole of the outer member and the pin groove of the inner member, a liner holder that comes in contact with a groove side surface of the pin groove, and a liner that is disposed between the liner holder and the pin in the pin groove.