Gas-Hydraulic Shock Absorber With Integrated Valve Buffer
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Solution Overview
Problem
Existing gas-hydraulic shock absorbers for railway vehicles suffer from complex designs, low manufacturability, and rigid operational characteristics, which affect their reliability and energy absorption efficiency.
Innovation Solution
A simplified design featuring a movable buffer with a hollow rod, throttle piston, and bypass valve arrangement, where the throttle valves and bypass valve are integrated into a drum-like structure with grooves for seals and guides, allowing for more elastic and stable energy absorption by converting kinetic energy into thermal energy through hydraulic fluid throttling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gas-hydraulic shock absorber designs are used with multiple chambers, springs, and complex valve arrangements, then the shock absorber can provide damping function, but the design complexity increases and manufacturability decreases
Solution Approach 1:
The patent combines multiple functional chambers (gas chamber, hydraulic chamber, cushioning chamber) into a single integrated cylinder body. The valve mechanism is merged with the piston assembly, eliminating separate valve bodies and connections. This integration reduces the number of parts and simplifies manufacturing while maintaining all necessary damping functions.
Solution Approach 2:
The piston assembly serves multiple functions simultaneously: it acts as a separator between gas and hydraulic chambers, contains the valve mechanism for fluid control, provides sealing surfaces, and enables relative movement for shock absorption. This multi-functionality reduces the need for separate dedicated components for each function.
2Ease of manufacture
If traditional designs with multiple separate components are used, then the shock absorber can be assembled, but the manufacturing process becomes more difficult and time-consuming
Solution Approach 1:
The patent combines multiple functional chambers (gas chamber, hydraulic chamber, cushioning chamber) into a single integrated cylinder body. The valve mechanism is merged with the piston assembly, eliminating separate valve bodies and connections. This integration reduces the number of parts and simplifies manufacturing while maintaining all necessary damping functions.
Solution Approach 2:
While integrating components, the patent maintains functional segmentation through internal separators: the piston divides the cylinder into gas and hydraulic chambers, and internal structures create cushioning chambers. This allows independent design optimization of each functional zone while using a unified manufacturing approach for the overall structure.
3Adaptability or versatility
If rigid performance characteristics are used in traditional shock absorbers, then the damping force is predictable, but the shock absorber cannot adapt to varying operational conditions
Solution Approach 1:
The patent implements a valve mechanism that dynamically adjusts fluid flow resistance based on piston movement speed and direction. The valve opens at different thresholds for compression and rebound strokes, and the flow area varies with velocity. This dynamic behavior allows the shock absorber to adapt to varying operational conditions while maintaining stable and predictable damping characteristics through controlled fluid throttling.
Solution Approach 2:
The shock absorber changes operational parameters (valve opening area, fluid flow rate, pressure differential) based on the magnitude and direction of applied forces. The valve mechanism responds to pressure changes caused by different shock intensities, automatically adjusting the damping force to match the operational conditions without external control.
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 new design enhances energy absorption intensity, improves manufacturability, and increases the reliability and service life of the shock absorber by providing more elastic and stable operational characteristics.
Implementation Method 1
allowing for more elastic and stable energy absorption by converting kinetic energy into thermal energy through hydraulic fluid throttling
Implementation Method 2
each spring-loaded throttle valve consisting of a sleeve, a guide, an adjusting washer, a spring and a needle
Data Source
AI summary
A gas-hydraulic shock absorber contains a housing having a filler plug, a movable buffer installed in the housing, a movable separating piston, throttle valves, and a bypass valve. The housing is formed by a cylinder fixed on a base and plugged with a bottom on one side, and having an installed axle box on its opposite side. The movable buffer is a hollow rod, plugged on one end with a removable cover with a gas-charging valve placed in it, and plugged on the opposite end with a fixed throttle piston. The movable separating piston is made with at least one annular groove for placing seals and an annular guide element in the annular grooves. The movable separating piston is arranged in the hollow rod.