Balanced Hydro-Cylinder Buffering for Fast Impact Pressure Relief
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Solution Overview
Problem
Traditional hydraulic supports face damage due to inadequate pressure relief during heavy load impacts, particularly in mines with complex ground pressure conditions, leading to safety risks and operational inefficiencies.
Innovation Solution
An impact-resistant balanced hydro-cylinder with pressure relief and buffering protection, featuring a cylinder body, piston, and valve cores with gas and oil cavities, one-way valves, limiting bosses, and disc springs, which provides multi-stage buffering and rapid overflow unloading to stabilize pressure and prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety valve pressure relief mechanism is used, then the structure is simple, but the response time is too slow and cannot prevent damage under heavy load impact
Solution Approach 1:
The patent pre-positions multiple valve cores (first valve core and second valve core) and their corresponding through holes within the cylinder body before impact occurs. When impact happens, these pre-positioned components immediately begin relieving pressure without requiring activation time, thus achieving fast response while maintaining structural simplicity.
Solution Approach 2:
The patent divides the single pressure relief function into multiple segmented components: first valve core with first through hole, second valve core with second through hole, and multiple cavities (first gas cavity, second gas cavity, first oil cavity, second oil cavity). This segmentation enables simultaneous multi-point pressure relief, dramatically reducing response time while keeping each individual component simple.
2Reliability
If heavy load impact protection is enhanced with multiple valves and cavities, then the response speed improves, but the device complexity increases
Solution Approach 1:
The cylinder body serves multiple functions simultaneously: it contains the piston, supports multiple valve cores, forms multiple cavities (gas and oil), and provides the structural framework. This multi-functionality allows the patent to achieve complex impact protection with relatively simple individual components, reducing overall device complexity while maintaining high reliability.
Solution Approach 2:
The patent merges the first valve core and second valve core into the same cylinder body, and combines multiple cavities (first gas cavity, second gas cavity, first oil cavity, second oil cavity) within a single integrated structure. This merging approach achieves comprehensive impact protection without proportionally increasing device complexity, as all components work together in a unified system.
3Reliability
If traditional single-stage pressure relief is used, then the structure is simple, but the buffering effect is insufficient under complex ground pressure
Solution Approach 1:
The patent utilizes both gas cavities (first gas cavity, second gas cavity) and oil cavities (first oil cavity, second oil cavity) to create a combined pneumatic-hydraulic buffering system. The gas provides compressible cushioning while the oil provides hydraulic damping, achieving superior buffering protection under complex ground pressure conditions without requiring overly complex mechanical structures.
Solution Approach 2:
The patent changes the physical parameters of the pressure relief system by introducing multiple cavities with different compressibility characteristics (gas vs. oil) and multiple valve cores that can open at different pressure thresholds. This parameter diversification enables multi-stage buffering that effectively handles complex ground pressure variations while maintaining reasonable structural 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
The solution enhances the buffering effect and safety of the hydro-cylinder by ensuring stable pressure relief and preventing damage from excessive loads, simplifying the hydraulic system structure and improving operational safety.
Implementation Method 1
an impact-resistant balanced hydro-cylinder with pressure relief and buffering protection includes a cylinder body, a piston, a piston rod, and a first valve core and a second valve core slidable relative to the cylinder body
Implementation Method 2
a closed first gas cavity is formed between the first valve core and an inner wall of an end of the cylinder body and a closed second gas cavity is formed between the second valve core and an inner wall of an opposite end of the cylinder body
Implementation Method 3
a through hole for the first oil cavity is provided at a position on the cylinder body corresponding the first oil cavity and a through hole for the second oil cavity is provided at a position on the cylinder body corresponding to the second oil cavity
Data Source
AI summary
An impact-resistant balanced hydro-cylinder with pressure relief and buffering protection comprises a cylinder body (11), a piston (13), a piston rod (14), and a first valve core (21) and a second valve core (51) slidable relative to the cylinder body (11). A closed first gas cavity (22) and a closed second gas cavity (52) are respectively formed between the two valve cores and inner walls of two opposite ends of the cylinder body (11). A closed first oil cavity (32) and a closed second oil cavity (42) are respectively formed between the two valve cores and two end faces of the piston (13). A through hole (33) for the first oil cavity and a through hole (43) for the second oil cavity are respectively provided in the positions on the cylinder body (11) corresponding to the first oil cavity (32) and the second oil cavity (42).