Bidirectional Sealing Groove Layout for Slide Components
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Solution Overview
Problem
Conventional slide components fail to maintain sealing performance when the rotating-side sealing ring is reversed, as the spiral groove cannot generate enough dynamic pressure, leading to fluid leakage from the sealed fluid side to the leakage side.
Innovation Solution
A slide component design featuring a pair of sliding components with fluid introduction grooves and pressure generation mechanisms, including overlapping portions and inclined walls, which narrows the leakage area and prevents fluid leakage by generating dynamic pressure and positive pressure, regardless of rotation direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spiral groove is used as a pressure generation mechanism, then dynamic pressure is generated to pump fluid from leakage side to sealed fluid side during normal rotation, but during reverse rotation the spiral groove cannot generate enough dynamic pressure and sealing performance deteriorates
Solution Approach 1:
The patent employs asymmetric groove designs where the spiral groove and positive pressure generation groove have different orientations and configurations. The spiral groove is optimized for clockwise rotation while the positive pressure generation groove is positioned and shaped to generate pressure during counter-clockwise rotation, creating asymmetric pressure distribution that adapts to rotation direction
Solution Approach 2:
The patent implements dynamic pressure generation mechanisms where grooves are designed to generate positive or negative pressure based on rotation direction. The system dynamically adapts its pressure generation mode: during normal rotation the spiral groove generates positive dynamic pressure, while during reverse rotation the positive pressure generation groove generates negative pressure to compensate for reduced dynamic pressure
2Reliability
If a positive pressure generation groove is added to compensate for reverse rotation, then negative pressure is generated during reverse rotation to compensate for reduced dynamic pressure, but a circumferential gap remains in the leakage area between adjacent grooves where fluid can flow from sealed fluid side to leakage side
Solution Approach 1:
The patent merges multiple pressure generation functions into an integrated groove system. The spiral groove and positive pressure generation groove are combined in a coordinated arrangement where their pressure generation zones overlap or complement each other, eliminating circumferential gaps in the pressure distribution and creating a continuous sealing effect during reverse rotation
Solution Approach 2:
The patent segments the pressure generation function into multiple specialized grooves: the spiral groove for dynamic pressure generation during normal rotation, and the positive pressure generation groove for compensating during reverse rotation. This segmentation allows each groove to be optimized for its specific function while working together to provide continuous sealing
3Reliability
If multiple pressure generation grooves are arranged circumferentially, then pressure is generated to prevent leakage, but circumferential gaps between adjacent grooves create leakage paths from sealed fluid side to leakage side
Solution Approach 1:
The patent extends the sealing mechanism from a two-dimensional groove pattern to a three-dimensional pressure field. By designing grooves that generate pressure in multiple directions and overlapping pressure zones, the system eliminates circumferential gaps and creates continuous pressure distribution across the sealing interface, preventing fluid leakage through gaps between adjacent grooves
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 reduces leakage and maintains sealing performance even during reverse rotation by compensating for the reduced dynamic pressure with negative pressure generation, ensuring efficient fluid lubrication and sealing.
Implementation Method 1
by the dynamic pressure generated by the dynamic pressure generation groove 41, a slight gap is formed between the sliding faces of the rotating-side sealing ring and a stationary-side sealing ring
Implementation Method 2
the fluid existing on the leakage side is pumped toward the sealed fluid side, and therefore it is possible to prevent the fluid on the sealed fluid side from leaking to the leakage side
Implementation Method 3
a positive pressure generation groove 42 reversely generates negative pressure, and the fluid from the spiral groove 41 is sucked in the positive pressure generation groove 42 having negative pressure
Implementation Method 4
in the low-speed rotation state, the fluid is actively introduced into the sliding face by the fluid introduction groove 43, and it is possible to lubricate the sliding face S
Data Source
AI summary
The purpose of the present invention is to provide a slide component that can exhibit sealing performance and lubricity regardless of rotating direction. A pair of slide components 4, 7 that slide relative to each other have sliding faces S that slide relative to each other, and a sealed fluid-side periphery 16 and a leakage-side periphery 15. The sliding face S of at least one slide component 4 of the pair of slide components 4, 7 includes: a fluid introduction groove 13 in communication with the sealed fluid-side periphery 16; a first pressure generation mechanism 12 of which one end is in communication with the fluid introduction groove 13 and the other end is surrounded by a land portion R1; and a second pressure generation mechanism 11 of which one end is in communication with the leakage-side periphery 15 and the other end is surrounded by an annular land portion R2. The fluid introduction groove 13 and the other end 12e of the first pressure generation mechanism 12 include overlapping portions Lp overlapping circumferentially.