Anti-Clog Inlet Housing With Bypass Conduit
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Solution Overview
Problem
Existing lubricant distribution assemblies in rotary wing aircraft are prone to clogging due to excessive debris, which can prevent lubricant from passing through the chip detector screen or inlet housing, disrupting fluid flow to the pumps.
Innovation Solution
A fluid distribution assembly with a bypass conduit system that allows fluid to bypass the chip detector cavity and filter when the primary flow path is blocked, incorporating a vortex reducer at the inlet to minimize vortex formation and a screen between the primary and bypass conduits to manage debris, ensuring continuous lubricant flow to the pumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a chip detector screen is used to capture contaminants in lubricant, then measurement precision of contaminants is improved, but the screen becomes clogged by excessive debris preventing fluid flow
Solution Approach 1:
The inlet housing is divided into multiple chambers: a first chamber receiving lubricant from the sump, a second chamber containing the chip detector assembly with screen, and a third chamber receiving lubricant from the second chamber. This segmentation allows the screen to be isolated in its own chamber, preventing debris accumulation from blocking the entire fluid path while maintaining contaminant detection capability.
Solution Approach 2:
A bypass conduit acts as an intermediary path, allowing lubricant to flow directly from the first chamber to the third chamber when the screen becomes clogged. This bypass mechanism mediates between the contaminant capture function and the fluid flow requirement, ensuring continuous lubrication even when the chip detector screen is blocked.
2Quantity of substance
If a single inlet housing with chip detector screen is used, then contaminant capture is effective, but excessive debris clogs the inlet housing and prevents lubricant passage
Solution Approach 1:
The inlet housing is segmented into multiple chambers with separate flow paths. The first chamber receives lubricant from the sump, the second chamber contains the chip detector assembly where contaminants are captured, and the third chamber receives filtered lubricant. This segmentation allows contaminant capture to occur without blocking the overall lubricant flow path.
Solution Approach 2:
The bypass conduit serves as an intermediary flow path that allows lubricant to bypass the chip detector screen when it becomes clogged with excessive debris. This ensures that contaminant capture quantity is maintained while productivity (lubricant flow rate) is preserved through the alternative path.
3Use of energy by moving object
If vortex flow is allowed at the inlet opening, then fluid mixing is enhanced, but excessive vortex formation creates pressure loss and debris accumulation
Solution Approach 1:
The vortex reducer extracts and eliminates excessive vortex formation at the inlet opening between the first and second chambers. By removing the harmful vortex flow while preserving necessary fluid mixing, the design reduces energy loss and prevents debris accumulation that would otherwise occur in violent vortex conditions.
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 bypass conduit system ensures uninterrupted lubricant flow to the pumps by diverting fluid through a secondary path when the primary path is blocked, reducing the likelihood of clogging and maintaining system functionality, while the vortex reducer and screen combination minimizes debris accumulation and pressure loss.
Implementation Method 1
the inlet housing including a vortex reducer located adjacent the inlet which can reduce vortices created at an opening between the first conduit and the bypass conduit
Implementation Method 2
a screen positioned between the first conduit and the bypass conduit, the screen to pass fluid between the first conduit and the bypass conduit
Data Source
AI summary
A fluid distribution assembly for distributing a fluid, the fluid distribution assembly includes an inlet housing including a first conduit and a bypass conduit; a chip detector cavity in fluid communication with the first conduit such that the fluid can pass through the first conduit into the chip detector cavity; and an outlet housing in fluid communication with the chip detector cavity and the bypass conduit such that the fluid can pass into the outlet housing through the chip detector cavity and/or the bypass conduit.