Rotary Joint Rustless Sleeve Fluid Path Design
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Solution Overview
Problem
Current rotary joints face challenges in preventing supply fluid from causing rust between components, making it difficult to disassemble and replace parts, and risking contamination of machined surfaces with rust particles in the fluid.
Innovation Solution
A rotary joint design featuring a sleeve made of rustless material with internal fluid passages that prevent supply fluid from intruding into joining surfaces, combined with elastic seal rings and O-rings to ensure hermetic sealing and easy disassembly, reduces rust formation and facilitates component replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If supply fluid is circulated through conventional rotary joints with metal components, then fluid supply function is achieved, but rust forms on joining surfaces making disassembly difficult
Solution Approach 1:
The patent extracts the harmful element (supply fluid contacting metal joining surfaces) by introducing a fluid passage that routes the supply fluid through a dedicated path, preventing it from reaching and rusting the joining surfaces between the rotary joint and rotary shaft
Solution Approach 2:
The patent introduces an intermediary structure (fluid passage with sealing elements) between the supply fluid and the joining surfaces. This intermediary prevents direct contact between the fluid and metal surfaces, eliminating rust formation while maintaining the sealing function
2Productivity
If supply fluid contacts joining surfaces between rotary joint and rotary shaft, then fluid passage function is achieved, but rust particles contaminate the processed surface
Solution Approach 1:
The patent extracts the supply fluid from the path that would lead to joining surfaces and rust particle generation. By creating a dedicated fluid passage, the fluid is routed through a controlled path that prevents contact with metal surfaces, thus eliminating rust particle contamination of the processed surface
3Reliability
If conventional sealing structures are used, then sealing function is provided, but components become stuck due to rust and replacement is difficult
Solution Approach 1:
The patent extracts the supply fluid from contact with component joining surfaces, preventing rust formation that would cause components to stick together. This allows components to be easily removed and replaced without rust-related adhesion problems
Solution Approach 2:
The patent introduces sealing elements as intermediaries that maintain the sealing function while preventing supply fluid from reaching and rusting the component joining surfaces. This intermediary structure preserves sealing performance while eliminating rust-related assembly issues
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
Prevents rust on joining surfaces, allows easy disassembly and replacement of components, and prevents contamination of processed surfaces by ensuring the supply fluid does not mix with rust, thereby reducing assembly and replacement costs and maintaining surface integrity.
Implementation Method 1
a first stationary seal ring having a first counterpart sealing surface coming into close contact with the first sealing surface, and hermetically held by the housing; and a second stationary seal ring having a second counterpart sealing surface coming into close contact with the second sealing surface, hermetically held by the housing
Data Source
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AI summary
A rotary joint having a stationary section (60) having a fluid path (6) in which sealed fluid flows; a sleeve (30) having in it a second connection fluid path (6C) in which the fluid from the fluid path flows, rotatable relative to the stationary section, and made of a rustless material; a rotary seal ring (2) having a first connection fluid path (6B) that has an inner peripheral surface fitting on the outer peripheral surface of the sleeve so as to be connectable to the second connection fluid path, having a first seal surface (2A) on one side face of the rotary seal ring (2), and having a second seal surface (2B) on the other side face of the rotary seal ring (2) ; a first stationary seal ring (10) having a first relative seal surface (10S) in intimate contact with the first seal surface; and a second stationary seal ring (11) having a second relative seal surface (11S) in intimate contact with the second seal surface and enabling the fluid path and the first connection fluid path to be connection to a space between the first stationary seal ring (10) and the second stationary seal ring (11).