Superhard Force Coupling Assembly for Abrasive Torque Transfer
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Solution Overview
Problem
Existing coupling assemblies in mechanical systems, particularly in extreme environments like subterranean drilling, face issues with wear due to caustic and abrasive fluids, and deflection of output shafts leading to increased maintenance and equipment replacement costs, while also requiring effective torque and thrust force transmission.
Innovation Solution
The use of superhard contact elements, such as polycrystalline diamond compacts, in torque and force coupling assemblies to transfer torque and thrust forces between concentric rings, ensuring minimal relative movement and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional contact elements are used in coupling assemblies, then the assembly can transmit torque and thrust forces, but the contact elements experience increased wear due to caustic and abrasive fluids in extreme environments
Solution Approach 1:
The patent applies composite materials by using superhard materials (such as diamond-like carbon or cubic boron nitride) coated on the contact elements. These coatings provide exceptional resistance to wear from caustic and abrasive fluids while maintaining the structural integrity and torque transmission capabilities of the coupling assembly. The composite structure combines the strength of the base material with the wear resistance of the superhard coating.
Solution Approach 2:
The patent changes the material parameters of the contact elements by selecting superhard materials with significantly higher hardness and wear resistance compared to conventional materials. This parameter change enables the contact elements to withstand the harsh chemical and mechanical environments without excessive wear, thereby improving reliability in extreme conditions.
2Adaptability or versatility
If output shaft deflects at various angles relative to the axis of rotation, then the shaft can accommodate operational variations, but additional forces and loads are applied to the force couplings attached to the shaft
Solution Approach 1:
The patent applies dynamics by designing the coupling assembly to dynamically adapt to shaft deflection. The coupling mechanism incorporates movable elements and flexible connections that can adjust their position and orientation as the shaft deflects, allowing the system to accommodate angular variations without generating excessive additional forces. This dynamic adaptation maintains force transmission efficiency while protecting the couplings from overload.
3Reliability
If force couplings are sealed from environmental elements, then the couplings are protected from corrosive drilling fluids, but the sealing requirements increase device complexity
Solution Approach 1:
The patent applies the extraction principle by removing the need for complex sealing structures through material selection. Instead of relying on seals to protect against corrosive drilling fluids, the contact elements are made from superhard materials that inherently resist chemical corrosion. This extraction of the sealing function simplifies the device structure while maintaining protection from environmental elements.
Data Source
AI summary
Force coupling or torque coupling assemblies, apparatuses, systems, and methods include assemblies that each include superhard contact elements. At least some of the superhard contact elements may be configured to remain in contact with each other when a rotational force and/or a thrust force is applied between the assemblies.