Multi-Fluid Pressure Calibration with Low-Torque Sealing and Mode Switching
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Solution Overview
Problem
Current calibration pressure devices face challenges in operating effectively in both pneumatic and hydraulic applications due to differences in pressure values, requiring separate devices and experiencing issues with seal failure, torque requirements, and mode switching difficulties.
Innovation Solution
The development of a calibration pressure device with a micro metering bleed valve, unidirectional slip clutch, and check valves with O-ring seals that can operate in both pneumatic and hydraulic applications, along with a mode selector valve allowing easy switching between vacuum and pressure modes, and volume adjusters with concentric pistons for fine-tuned pressure adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal to metal seals are used in hydraulic applications, then high pressure sealing is achieved, but torque requirement increases and fine tuning becomes difficult
Solution Approach 1:
The patent changes the material parameter of the seal from metal to elastomer (O-ring), which fundamentally alters the sealing mechanism. Elastomer seals rely on elastic deformation rather than metal-to-metal contact, allowing sealing at high pressures without requiring excessive torque to overcome friction between metal surfaces.
Solution Approach 2:
The patent employs composite sealing solutions by combining elastomer O-rings with metal housing structures. The O-ring material provides the sealing function through its elastic properties, while the metal housing provides structural strength, creating a composite system that resolves the torque vs. sealing capability contradiction.
2Adaptability or versatility
If a single device is designed to handle both pneumatic and hydraulic applications, then versatility is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a single calibration device with components that can handle both pneumatic and hydraulic applications. The elastomer O-ring seals, micro metering bleed valve, and slip clutch mechanism are designed to function across both gas and liquid fluid types, eliminating the need for separate devices while maintaining performance in both application domains.
3Volume of moving object
If check valve seals are positioned on the poppet, then compact design is achieved, but seal durability decreases due to rapid failure at high pressures
Solution Approach 1:
The patent extracts the seal from the poppet component and relocates it to the valve body housing. This separation allows the O-ring to be positioned in a larger, more stable location on the housing rather than constrained on the moving poppet, improving seal durability by reducing stress and deformation during high-pressure operation.
Solution Approach 2:
The patent changes the spatial dimension of seal placement from the small-scale poppet surface to the larger valve body housing. By moving the seal to a different dimensional space (from component-scale to assembly-scale), the seal experiences reduced volumetric material deformation, extending its mean time between failures.
4Productivity
If volume adjusters are designed for pneumatic applications with large volume adjustments, then pneumatic performance is improved, but torque requirement increases for hydraulic applications
Solution Approach 1:
The patent applies dynamics by making the volume adjuster mechanism adaptable to different operating conditions. The micro metering bleed valve with slip clutch provides dynamic control that can accommodate both large volume adjustments for pneumatic applications and fine-tuned adjustments for hydraulic applications, adjusting the effective torque requirements based on the application type.
Data Source
AI summary
A pressure calibration device can include certain features that allow it to be used with a variety of hydraulic and pneumatic systems. A pressure calibration device can be configured to provide pressure or vacuum, and can have a mode selector for selecting to provide pressure or vacuum. A pressure calibration device can have a volume adjuster configured to modify pressures for hydraulic or pneumatic systems. A pressure calibration device can have a pressure release valve and a bleed valve for adjusting pressure values.