O-ring Lubrication System for Pressure Regulators
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Solution Overview
Problem
Existing mechanical devices with piston and cylinder arrangements require periodic disassembly to replenish lubricant for O-rings, leading to increased maintenance costs and reduced operational life due to lubricant depletion over time.
Innovation Solution
A lubrication system with a reservoir between O-rings and an input port allows for lubricant replenishment without disassembly, featuring an annular groove on the piston and an input port extending through the cylinder, enabling continuous lubrication of O-rings during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If lubricant is applied to O-rings during operation, then the operational life of the mechanical device is extended, but the lubricant is depleted over time requiring periodic replenishment that involves disassembling the mechanical device
Solution Approach 1:
The lubrication system is segmented into distinct components: a lubricant reservoir, a delivery mechanism, and application points. This allows the lubrication function to be separated from the main mechanical device structure, enabling independent maintenance of the lubrication system without disassembling the entire device.
Solution Approach 2:
The system incorporates an automatic lubricant delivery mechanism that self-regulates lubricant flow to the O-rings during operation. The piston movement automatically actuates the lubricant delivery, eliminating the need for manual intervention and enabling continuous self-lubrication throughout the device operational cycle.
2Reliability
If lubricant is replenished periodically by disassembling the mechanical device, then the lubrication level is maintained, but maintenance time and operational downtime increase
Solution Approach 1:
Lubricant is pre-loaded into a reservoir that is integrated with the lubrication system. This preliminary action ensures that lubricant is readily available and can be delivered to the O-rings without requiring disassembly for replenishment, maintaining continuous lubrication during extended operation periods.
Solution Approach 2:
The system provides continuous lubricant delivery to the O-rings throughout the operational cycle. The piston movement continuously actuates the lubricant delivery mechanism, ensuring uninterrupted lubrication without periodic interruptions for maintenance, thereby eliminating operational downtime.
3Ease of operation
If a lubrication reservoir and input port system is implemented, then lubricant replenishment is enabled without disassembly, but the device complexity increases
Solution Approach 1:
The lubrication reservoir is merged with the piston structure, and the delivery mechanism is integrated into the existing cylinder-piston assembly. This consolidation combines multiple functions into existing components, adding lubrication capability without proportionally increasing overall device complexity.
Solution Approach 2:
The piston serves multiple functions: it performs its primary mechanical function while also acting as part of the lubrication delivery system. The piston movement simultaneously drives the mechanical operation and actuates the lubricant delivery mechanism, creating a multi-functional component that reduces overall system complexity.
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
This solution extends the operational life of mechanical devices by maintaining lubrication of O-rings without disassembly, reducing maintenance costs and ensuring consistent performance.
Implementation Method 1
A lubricant, such as grease, is generally coated on the O-rings and the walls of the cylinder and piston to reduce friction between the interior wall of the cylinder and the O-ring
Data Source
AI summary
A pressure regulator includes a cylinder and a piston contained in the cylinder. First and second O-rings are attached to the cylinder and configured to form a seal between the cylinder and an interior wall of the piston. The pressure regulator has a lubrication system that includes a lubrication reservoir between the first and second O-rings defined by an annular groove in an exterior surface of the piston and the interior wall of the cylinder, and an input port extending through the cylinder to the lubrication reservoir. The piston is configured to move along a central axis relative to the cylinder between first and second positions. The first and second O-rings are displaced from the input port during movement of the piston between the first and second positions.