Spindle Assembly Fluid Channel for Tire Inflation Leakage
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Solution Overview
Problem
Tire inflation systems for industrial vehicles face challenges in efficiently draining fluid leaked from the annular seal chamber, which can contaminate lubricants and limit system flexibility, especially under pressurized conditions.
Innovation Solution
A spindle assembly with a fluid conduit and rotatable part, featuring a dynamic annular seal chamber and fluid channels that connect axially opposing volumes, allowing efficient drainage of leaked fluid without mixing it with lubricants, even under pressurized conditions, by separating the fluid channel from the seal chamber, conduit, and passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If leakage reception spaces are arranged on axially opposing sides of an annular space with bores in a sheet metal ring, then leakage air can be discharged, but the discharge can only occur in the absence of filling air pressure, limiting system flexibility
Solution Approach 1:
The annular space is divided into two separate leakage reception spaces (first and second) located on axially opposing sides. Each space has its own drainage path through the spindle, allowing independent management of leakage from different sides of the seal chamber.
Solution Approach 2:
A fluid channel is introduced as an intermediary element that connects the first and second leakage reception spaces. This channel allows pressurized fluid to flow from one side to the other, enabling drainage capability even when the seal chamber is under pressure, thus resolving the limitation of previous designs.
2Object-affected harmful factors
If multiple draining channels are provided to drain leaked fluid from both sides of the seal chamber, then fluid leakage contamination is reduced, but the number of components and system complexity increases
Solution Approach 1:
The drainage functions for both axially opposing sides of the seal chamber are merged into a single fluid channel within the spindle. The channel receives leaked fluid from both sides and conducts it to a common drainage outlet, reducing the number of separate drainage paths while maintaining effective leakage management.
Solution Approach 2:
The fluid channel serves multiple functions: it acts as a drainage path for leakage from the first reception space, a drainage path for leakage from the second reception space, and a connector between the two spaces. This multi-functionality reduces the overall number of components needed.
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 solution effectively reduces fluid leakage contamination and enhances system flexibility by allowing efficient drainage of leaked fluid, reducing the number of draining channels and maintaining system functionality under pressurized conditions.
Implementation Method 1
a dynamic annular seal chamber, the annular seal chamber being disposed radially between the spindle and the rotatable part
Implementation Method 2
sealing means forming a dynamic annular seal chamber are configured to be in sliding sealing contact with each other
Data Source
AI summary
A spindle assembly for a tire inflation system having a spindle defining an axial direction and a fluid conduit. A rotatable part is rotatably mounted on the spindle and has a fluid passage. The fluid passage is configured to be in fluid communication with a pneumatic tire. A dynamic annular seal chamber is also provided. The annular seal chamber is disposed radially between the spindle and the rotatable part. The fluid conduit and the fluid passage are in fluid communication with each other through the annular seal chamber. The annular seal chamber is disposed axially between a first volume and a second volume. The first volume and the second volume are in fluid communication with each other through at least one fluid channel for leading fluid leaked out of the annular seal chamber and leaked into the first volume and/or into the second volume through the fluid channel.