Pressure-Adjustable Gas Spring with Movable Valve Body
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Solution Overview
Problem
Existing gas springs fail to extend normally or fully to the working position when the load exceeds the internal pressure, leading to inadequate stretching force and compressing force.
Innovation Solution
A pressure-adjustable gas spring design featuring an outer and inner cylinder tube, a floating separator piston, and an adjustment assembly that allows the valve body to move axially, enabling the volume of the gas cavity to be adjusted, thereby increasing internal pressure and thrust force when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the gas spring uses a fixed gas cavity volume, then the structure is simple, but the stretching force is insufficient when load exceeds internal pressure
Solution Approach 1:
The patent implements a movable valve body that can adjust the gas cavity volume dynamically. The valve body translates along the axial direction under the action of a pressure-balancing spring, automatically changing the gas cavity volume according to the load conditions. This dynamic adjustment mechanism allows the gas spring to adapt to varying loads without requiring complex external control systems.
Solution Approach 2:
The patent changes the physical parameter of gas cavity volume to adjust the internal pressure and stretching force. By moving the valve body axially, the gas cavity volume is varied, which directly changes the pressure exerted by the compressed gas on the piston rod, thereby adjusting the stretching force to match different load requirements.
2Force
If the gas cavity volume is increased to provide more stretching force, then the stretching force increases, but the internal pressure decreases when load is heavy
Solution Approach 1:
The movable valve body with pressure-balancing spring creates a dynamic system that automatically adjusts gas cavity volume based on load conditions. When load increases, the valve body moves to reduce gas cavity volume, maintaining high internal pressure and thus high stretching force. This dynamic adjustment resolves the contradiction between having large volume for force and maintaining pressure under heavy load.
Solution Approach 2:
The pressure-balancing spring replicates the external load conditions inside the gas spring, creating a counterbalancing force that drives the valve body to the appropriate position. This copying mechanism ensures the gas cavity volume is automatically adjusted to match the external load, maintaining optimal internal pressure regardless of load variations.
3Adaptability or versatility
If the valve body is fixed, then the structure is stable, but the pressure and stretching force cannot be adjusted for different loads
Solution Approach 1:
The valve body is designed to move freely along the axial direction under the influence of the pressure-balancing spring and gas pressure differential. This dynamic capability allows the same structure to adapt to various load conditions without requiring multiple fixed configurations or complex external control mechanisms.
Solution Approach 2:
The pressure-balancing spring automatically senses the load conditions and drives the valve body to the appropriate position without external intervention. The system self-regulates the gas cavity volume based on the balance between the spring force and gas pressure, providing automatic adaptation to different loads.
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
Enables the piston rod to fully extend under heavier loads by increasing internal pressure and provides adjustable stretching and compressing forces, ensuring effective operation even when loads exceed initial pressure limits.
Implementation Method 1
gas and oil liquid are stored in the cylinder tube. Since the piston occupies the volume in the cylinder tube, the piston is compressed into the cylinder tube when working, then the piston moves in the axial direction in the cylinder tube to press the oil liquid, then the oil liquid compresses the gas
Implementation Method 2
the piston moves in the axial direction in the cylinder tube to press the oil liquid, then the oil liquid compresses the gas
Data Source
AI summary
A pressure-adjustable gas spring is invented. A gas spring mainly consists of a cylinder tube, a piston in the cylinder tube, a piston rod, a valve rod and so on; gas and oil liquid are stored in the cylinder tube. Since the piston occupies the volume in the cylinder tube, the piston is compressed into the cylinder tube when working, then the piston moves in the axial direction in the cylinder tube to press the oil liquid, then the oil liquid compresses the gas so that the piston reaches the working position; when the external force loaded on the piston rod is removed, the gas recovers and expands, and the expanded gas pushes the oil liquid to reset the piston and move out the piston rod, so that the gas spring realizes a compression motion and a restoration damping motion.