Replaceable Blade Earth Drilling Reamer Design
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Solution Overview
Problem
Existing reamers used for enlarging pilot boreholes under obstacles like rivers lack efficient mechanisms for blade replacement and maintenance, leading to reduced effectiveness and increased wear due to debris accumulation and varying soil types.
Innovation Solution
An earth drilling reamer with detachable primary and leading blades, secured by a locking assembly and track system, allowing for easy replacement and integration of ribs for strength and fluid flow channels for debris removal and lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional reamers use fixed blades that cannot be replaced, then the structure is simpler, but blade wear and debris accumulation reduce effectiveness over time
Solution Approach 1:
The reamer is divided into modular components: a body and separate replaceable blades. The blades are segmented from the main body and can be independently removed and replaced, allowing the cutting elements to be renewed without replacing the entire reamer assembly.
Solution Approach 2:
The blade mounting system transitions from a fixed static configuration to a dynamic replaceable system. The blades can be detached and reattached through a simplified mechanism, enabling adaptability to different soil conditions and wear states.
2Ease of repair
If blades are made detachable for easy replacement, then maintenance becomes easier, but the mounting structure becomes more complex
Solution Approach 1:
The blade mounting supports are extracted as separate components from the main reamer body. Each blade mounting support is a discrete element that can be independently accessed, removed, and replaced, simplifying the maintenance process.
Solution Approach 2:
The blades are designed as consumable, replaceable components rather than permanent parts. This allows the use of simpler, less expensive blade materials that can be easily replaced when worn, rather than investing in expensive, non-replaceable blade assemblies.
3Productivity
If reamers lack debris removal mechanisms, then the structure is simpler, but performance decreases due to debris accumulation
Solution Approach 1:
Fluid flow channels are introduced as intermediary pathways that carry lubricating fluid and debris away from the blade cutting edges. These channels act as mediators between the blade and the surrounding soil, enabling continuous operation without excessive debris accumulation.
Solution Approach 2:
The reamer utilizes fluid dynamics principles by incorporating channels that allow lubricating fluid to flow through and around the blades. This hydraulic approach enables debris removal and lubrication without requiring complex mechanical clearing mechanisms.
Data Source
AI summary
An earth drilling reamer has an elongated body having an outer surface and a plurality of blade mounting supports extending radially outwardly from the outer surface of the body. Each blade mounting support has a primary blade engagement positioned parallel to the outer surface and a leading blade angled from the outer surface to the primary blade engagement. A removable primary blade is detachably secured to the primary blade engagement.