Sliding Face Groove Layout to Prevent Fluid Mixing
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Solution Overview
Problem
Conventional sliding components fail to prevent mixing of different fluids on both sides of sliding faces, which can lead to safety hazards and fluid quality alteration due to chemical reactions, while also not effectively addressing lubrication and sealing requirements.
Innovation Solution
A sliding component design featuring a pair of sliding parts with distinct fluid-side negative pressure generation mechanisms and dynamic pressure generation mechanisms, isolated by lands, and circumferential grooves, which prevent fluid mixing while ensuring lubrication and sealing by forming a fluid film over the entire sliding face.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a positive pressure generation mechanism and negative pressure generation mechanism are provided on sliding faces to achieve lubrication and sealing, then lubricity and sealing performance are improved, but the mechanism cannot prevent low-pressure fluid from being discharged to the high-pressure fluid side
Solution Approach 1:
The sliding face is segmented into distinct functional zones: a first fluid-side negative pressure generation mechanism, a second fluid-side negative pressure generation mechanism, and a dynamic pressure generation mechanism. These segments are isolated by lands to prevent fluid mixing while maintaining各自的 functional effectiveness.
Solution Approach 2:
Different regions of the sliding face are assigned different functional qualities: the first fluid-side mechanism handles first fluid sealing, the second fluid-side mechanism handles second fluid sealing, and the dynamic pressure generation mechanism provides lubrication. Each region is optimized for its specific function with appropriate groove patterns and isolation structures.
2Force
If fluid intervention mechanisms are provided on sliding faces to reduce friction, then lubrication is improved, but different fluids on both sides can mix causing safety hazards and quality alteration
Solution Approach 1:
The lubrication function is segmented into separate zones for first fluid and second fluid, each with its own negative pressure generation mechanism and dynamic pressure generation mechanism. Lands isolate these zones to prevent fluid mixing while maintaining lubrication effectiveness.
Solution Approach 2:
Lands serve as intermediary structures between the first fluid-side mechanism and second fluid-side mechanism. These lands act as barriers that prevent direct communication between the two fluid zones, thereby preventing fluid mixing while allowing each zone to maintain its own fluid film for lubrication.
3Reliability
If negative pressure generation grooves are provided to prevent fluid leakage, then sealing is improved, but the structure becomes more complex
Solution Approach 1:
Multiple sealing and lubrication functions are merged into a single integrated surface texture structure on the sliding face. The first fluid-side negative pressure generation mechanism, second fluid-side negative pressure generation mechanism, and dynamic pressure generation mechanism are all combined in one component, reducing the need for separate sealing elements.
Solution Approach 2:
The surface texture structure performs multiple functions simultaneously: sealing first fluid, sealing second fluid, and providing lubrication. The dynamic pressure generation grooves serve both as sealing features and as lubrication features, reducing overall structural complexity.
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 effectively prevents fluid mixing, enhances suction and discharge effects, and ensures both lubrication and sealing of different fluids on both sides of the sliding faces, maintaining fluid quality and safety.
Implementation Method 1
a first fluid-side negative pressure generation mechanism including a first negative pressure generation groove, and a second fluid-side negative pressure generation mechanism including a second negative pressure generation groove
Implementation Method 2
a dynamic pressure generation mechanism including dynamic pressure generation grooves on at least one of a first-fluid side and a second-fluid side
Implementation Method 3
the first negative pressure generation groove is isolated from the second-fluid side by a land, and the second negative pressure generation groove is isolated from the first-fluid side by a land
Data Source
AI summary
In an exemplary embodiment of a sliding component, a sliding face S is provided with a first fluid-side negative pressure generation mechanism 12 including a first negative pressure generation groove 13, and is provided with a second fluid-side negative pressure generation mechanism 14 including second negative pressure generation grooves 15 located on the second-fluid side of the first fluid-side negative pressure generation mechanism 12, and is further provided with a dynamic pressure generation mechanism 10 including dynamic pressure generation grooves 11 on at least one of the first-fluid side and the second-fluid side of the first fluid-side negative pressure generation mechanism 12 and the second fluid-side negative pressure generation mechanism 14, and the first negative pressure generation groove 13 is isolated from the second-fluid side by a land R, and the second negative pressure generation grooves 15 are isolated from the first-fluid side by a land R.