Hydraulic Actuator Pressure Boosting With Float Valve Flow Control
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Solution Overview
Problem
Conventional hydraulic systems for working machines face challenges in efficiently controlling and managing the flow of operation fluid, particularly in ensuring smooth and quick movement of hydraulic actuators like booms and buckets, due to limitations in pressure management and fluid discharge mechanisms.
Innovation Solution
The hydraulic system incorporates a pressure increasing portion, discharge fluid tubes, and a float switching valve to manage fluid pressure and flow, allowing for the reversal of operation fluid and addition of return fluid to enhance the flow rate and efficiency of hydraulic actuator operations, such as boom movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the hydraulic system uses a single discharge fluid tube to discharge operation fluid from control valves, then the system structure is simple, but the flow rate of operation fluid is limited and bottlenecks occur during high demand operations
Solution Approach 1:
The single discharge fluid tube is segmented into multiple discharge fluid tubes (first discharge fluid tube and second discharge fluid tube). Each tube handles a portion of the operation fluid flow from different control valves, thereby increasing the total flow rate capacity without requiring a single oversized tube, and maintaining reasonable system complexity through modular segmentation.
2Speed
If the hydraulic system allows operation fluid to flow directly to the pressure increasing portion, then the response speed is fast, but the pressure management becomes uncontrolled and inefficient
Solution Approach 1:
The float switching valve acts as an intermediary between the discharge fluid tube and the pressure increasing portion. It automatically switches between the allowance position (allowing fast flow) and prevention position (controlling pressure) based on the liquid level in the accumulator, thereby maintaining both fast response and reliable pressure management without direct uncontrolled connection.
3Stress or pressure
If the hydraulic system blocks the second discharge fluid tube to increase pressure, then the pressure management is improved, but the discharge path for operation fluid is restricted
Solution Approach 1:
The float switching valve dynamically changes the flow path configuration based on system conditions. When the accumulator liquid level is high, the valve blocks the second discharge fluid tube to increase pressure. When the liquid level is low, the valve unblocks the second discharge fluid tube to provide an additional discharge path. This dynamic adaptation resolves the contradiction between pressure management and flow path versatility.
4Ease of operation
If the hydraulic system uses a float switching valve with multiple positions, then the fluid flow control is optimized, but the valve complexity increases
Solution Approach 1:
The float switching valve is designed to automatically switch between its three positions (allowance position, prevention position, and float position) based on the liquid level in the accumulator, without requiring external control signals or manual intervention. The float mechanism itself serves as the actuator, simplifying the overall control system while providing optimized fluid flow control through automatic adaptation to system conditions.
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
This configuration improves the response time and smoothness of hydraulic actuator movements by preventing flow rate bottlenecks and optimizing fluid usage, ensuring efficient operation even under high demand conditions.
Implementation Method 1
a pressure increasing portion to increasing a pressure of the operation fluid
Implementation Method 2
a float switching valve having an allowance position, a prevention position, and a float position
Data Source
AI summary
A hydraulic system includes a hydraulic pump, a first hydraulic actuator, a second hydraulic actuator, a first control valve to control the first hydraulic actuator, a second control valve to control the second hydraulic actuator, a pressure increasing portion to increasing a pressure of the operation fluid, a first discharge fluid tube connected to any one of the first control valve and the second control valve and connected to the pressure increasing portion, a second discharge fluid tube connected to the first discharge fluid tube and configured to discharge the operation fluid, a float switching valve having an allowance position, a prevention position, and a float position, the allowance position blocking the second discharge fluid tube and allowing the operation fluid to flow to the pressure increasing portion, the prevention position unblocking the second discharge fluid tube and preventing the operation fluid from flowing to the pressure increasing portion.