Pressure-Driven Fluid Circuit for Continuous Pressure Boosting
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Solution Overview
Problem
Existing pressure-increasing devices in fluid circuits require complex control systems and additional components like electromagnetic switching valves, leading to increased size, complexity, and cost.
Innovation Solution
A fluid circuit design that incorporates a pressure-increasing device with a piston and biasing member, where the switching between fluid delivery and discharge is managed by switching valves that operate based on fluid pressure changes, eliminating the need for electric control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an electromagnetic switching valve is used to switch valve positions according to piston reciprocation, then the working fluid can be continuously delivered to the accumulator, but the device size increases and control becomes complicated
Solution Approach 1:
The patent replaces the electromagnetic switching valve with a purely mechanical switching mechanism. The piston's reciprocating motion directly controls the switching valve through mechanical linkage, eliminating the need for electromagnetic actuators, sensors, and complex control programs. This substitution maintains continuous fluid delivery while significantly reducing device complexity and size.
Solution Approach 2:
The switching valve is designed to automatically switch positions based on the piston's reciprocation without external control signals. The mechanical linkage causes the valve to change position in response to piston movement, making the system self-regulating and eliminating the need for external electromagnetic control systems.
2Ease of operation
If an electromagnetic switching valve and detection devices are added, then valve switching can be controlled, but the overall device size increases
Solution Approach 1:
The patent combines the switching valve control function directly into the piston assembly through mechanical linkage. The valve switching mechanism is integrated with the piston's reciprocating motion, eliminating the need for separate electromagnetic actuators and detection devices. This merging reduces the overall device size while maintaining effective valve control.
3Measurement precision
If electromagnetic switching valves and control devices are used, then precise valve positioning can be achieved, but the cost increases
Solution Approach 1:
The patent employs a simple mechanical switching valve that can be manufactured at low cost using conventional machining techniques. The mechanical linkage and valve components are designed to be simple, robust, and easy to manufacture, replacing expensive electromagnetic components while maintaining sufficient positioning accuracy for the application.
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 design allows for continuous operation of the pressure-increasing device with a simplified configuration, reducing size, complexity, and cost while maintaining reliable fluid pressure generation.
Implementation Method 1
a biasing member for biasing the piston toward a first axial side
Implementation Method 2
when the working fluid flows into the back pressure chamber from the fluid supply device, the piston is pressed to a second axial side opposed to the first axial side
Data Source
AI summary
A fluid circuit includes first switching valve that switches between flow passages and first flow passages according to a change in a fluid pressure to be applied, a second switching valve that is switched to a flow passage which applies the fluid pressure to the first switching valve, when a piston has reached an initial position or an end position, and second flow passages. A biasing force of a biasing member when the piston reaches the end position is smaller than a pressing force acting on the piston due to the fluid pressure caused by a fluid supply device, and a biasing force of the biasing member when the piston reaches the initial position is larger than a sum of a flow passage resistance force acting on the first flow passages and a flow passage resistance force acting on the second flow passages.