Traction Gas Shock Absorber Flow Control Against Cavitation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traction gas shock absorber devices suffer from cavitation and bubbling phenomena, leading to unwanted noises and malfunctions due to the rapid movement of the piston, which is not controlled effectively.
Innovation Solution
A traction gas shock absorber device with a cylindrical body featuring a piston unit and dynamic sealing member, along with regulating means such as calibrated holes, to control the fluid flow and slow down the piston's movement from a contracted to an extracted position, preventing cavitation and bubbling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the piston moves rapidly from contracted to extracted position in a traction gas shock absorber, then the device is compact and has shorter movement time, but cavitation and bubbling phenomena occur causing noise and malfunctions
Solution Approach 1:
The patent introduces a fluid (oil) as an intermediary substance between the gas and the piston movement. This fluid acts as a mediator that controls the piston's motion by regulating fluid flow through calibrated holes, preventing direct rapid gas expansion that causes cavitation. The fluid serves as a buffer that mediates the energy transfer from gas pressure to piston movement, eliminating the harmful cavitation effect while maintaining the desired compactness and speed.
2Productivity
If the piston moves rapidly from contracted to extracted position, then the device is more compact, but unwanted noise is generated due to cavitation and bubbling
Solution Approach 1:
The oil fluid serves as an intermediary that dampens the piston movement and prevents direct gas expansion. By controlling the fluid flow rate through calibrated holes, the system mediates the energy release process, converting rapid gas expansion into controlled fluid flow that drives the piston at regulated speed. This intermediary fluid absorption and controlled release mechanism eliminates the bubbling and cavitation noise while preserving the compact design.
3Device complexity
If no flow regulation is provided, then the device structure is simple, but the piston movement is uncontrolled causing cavitation
Solution Approach 1:
The patent applies parameter changes by introducing calibrated holes with specific dimensions that control the fluid flow rate. By carefully selecting the hole size and number, the system regulates the piston movement speed without requiring complex active control mechanisms. This passive parameter-based flow regulation maintains structural simplicity while effectively preventing cavitation through controlled fluid discharge rates.
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
The solution ensures a controlled and braked movement of the piston, reducing noise and device malfunctions by regulating the fluid flow through calibrated passages, thereby enhancing the reliability and compactness of the shock absorber.
Implementation Method 1
Gas shock absorber devices that exploit the compression of a gas present inside them to lift or lower an object
Implementation Method 2
Inside the cylindrical body there is pressurized gas, usually pure nitrogen
Implementation Method 3
a shock absorbing liquid, for example oil
Implementation Method 4
a dynamic sealing member connected to the rod and having a sealing element which, in relation to the passage between the contracted position and the extracted position, is mobile respectively between an open position and a closed position, allowing and preventing the passage of the fluid
Implementation Method 5
The first internal cylinder is provided, at one end, with a hermetic closing bottom. the regulating means comprise at least one calibrated hole defining a passage having sizes such as to slow down the flow of the fluid
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Gas shock absorber device (10) of the traction type comprising a cylindrical body (11) provided with at least a first internal cylinder (15) and in which a piston unit (17), provided with a rod (21), is axially sliding between a contracted position (P1), in which the latter is disposed inside the cylindrical body (11), and an extracted position (P2), in which the rod (21) exits from the cylindrical body (11) where there is a fluid (F) able to generate a flow entering into and/or exiting from the first internal cylinder (15). The piston unit (17) is provided with a dynamic sealing member (20) connected to the rod (21) and having a sealing element (39) which, in relation to the passage between the contracted position (P1) and the extracted position (P2), is mobile between an open position (PA) and a closed position (PC).