Hydraulic Buffer With Dynamic Valve Control for Cylinder Stroke
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Solution Overview
Problem
Conventional hydraulic cylinders with buffers face issues such as monotonous buffering, complex structural arrangements, low buffering efficiency due to difficulties in combining throttling backpressure and pressure-relief unloading methods, poor controllability, and reliability concerns due to manufacturing precision requirements.
Innovation Solution
A hydraulic buffer system comprising a cylinder with a buffering module and signal generators that adjust hydraulic flows using slide valves and elastic components, allowing for self-adjustable and controllable buffering through pressure-relief unloading and throttling backpressure, while simplifying the structural arrangement and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional buffer uses fixed throttling opening, then结构简单, but buffering effect is poor in controllability and quality
Solution Approach 1:
The patent applies dynamics by making the throttling opening adjustable through a control valve that can change the opening size based on piston rod velocity. This allows the buffering system to adapt dynamically to different operating conditions, improving controllability while managing structural complexity through automated control mechanisms.
Solution Approach 2:
The patent implements feedback by using the piston rod velocity signal to automatically adjust the throttling opening size. The control system continuously monitors the velocity and adjusts the valve opening accordingly, creating a closed-loop control system that improves buffering quality without requiring manual intervention.
2Reliability
If conventional cylinder combines throttling backpressure and pressure-relief unloading, then buffering efficiency improves, but difficulties in combining cause low buffering efficiency
Solution Approach 1:
The patent merges throttling backpressure and pressure-relief unloading methods into a single integrated buffering system. The control valve combines both functions, allowing the system to simultaneously apply backpressure throttling and pressure relief unloading, thereby improving buffering efficiency while avoiding the complexities of separate systems.
Solution Approach 2:
The control valve is designed with multi-functionality, serving both as a throttling device and a pressure relief device. This universal component performs multiple buffering functions within a single structure, improving efficiency while reducing the overall system complexity compared to separate dedicated components.
3Adaptability or versatility
If conventional buffer uses monotonous buffering method, then结构简单, but buffering effect is monotonous and structural arrangement is complicated
Solution Approach 1:
The patent applies dynamics by transitioning from a static, monotonous buffering method to a dynamic system that adjusts throttling opening based on velocity. This enables the buffer to adapt its characteristics to different operating conditions, providing varied buffering effects while managing structural complexity through intelligent control.
4Reliability
If conventional cylinder requires high manufacturing precision, then buffering effect reliability improves, but manufacturing precision is highly required causing reliability issues
Solution Approach 1:
The patent applies self-service by implementing a control system that automatically compensates for manufacturing variations. The velocity-based control algorithm adjusts the throttling opening to maintain optimal buffering performance despite variations in assembly precision, reducing the stringency of manufacturing requirements while maintaining reliability.
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 hydraulic buffer system provides a high-quality, stable, and controllable buffering effect, improving the reliability and longevity of the cylinder by making the buffering resistance responsive to piston velocity and reducing the impact of assembly defects.
Implementation Method 1
The at least one elastic component is mounted in the valve body and abuts the valve body and the at least one slide valve
Implementation Method 2
oil may be thereby sent from the signal chamber with part of the oil flowing through the damping hole
Implementation Method 3
part of the oil flowing through the damping hole
Data Source
AI summary
A hydraulic buffer pertains to the field of hydraulic parts. A signal device (X) is installed at a position close to an end of a cylinder stroke to control movement of slide valves (12, 18, 12a, 12b, 12c, 12d, 12e, 12f, F1, F2, F3, F4) of the hydraulic buffer, to dynamically adjust the degree of valve openness and a liquid flow direction of a buffering module (Y), and therefore control pressure of oil entering an oil returning chamber of a cylinder. The high-pressure chamber of the cylinder releases pressure and unloads, and/or the oil returning chamber throttles to load pressure, such that a moving speed of a cylinder piston (6) at the end of the stroke is controlled, realizing buffering of the cylinder. The device eliminates defects in the prior art in which a buffering mechanism of a cylinder is complex, manufacturing accuracy requirements are high, structural arrangement is difficult, it is difficult to employ a combined configuration in which an oil returning chamber throttles to load pressure and a high-pressure chamber releases pressure and unloads, and buffering efficiency is not high. The device has desirable buffering controllability and high reliability, such that the overall quality is improved.