Fluid Pressure Circuit With Recovery Passage Pressure Stabilization
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Solution Overview
Problem
Existing fluid pressure circuits struggle to stabilize fluid pressure when regenerative drive devices and recovery passages are used together, leading to instability in both regeneration and recovery operations.
Innovation Solution
A fluid pressure circuit that includes a fluid supply source, a cylinder device with partitioned chambers, a valve that diverts return fluid through a throttle, and a recovery passage connecting the fluid supply source to the cylinder device, allowing return fluid to flow from one chamber to another, thereby stabilizing primary side fluid pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a regenerative drive device and recovery passage are used together in a fluid pressure circuit, then energy saving is improved, but fluid pressure stability deteriorates
Solution Approach 1:
A pressure stabilizing valve is introduced as an intermediary component between the recovery passage and the fluid supply source. This valve actively regulates and stabilizes the fluid pressure on the primary side of the cylinder device, ensuring that the recovery passage receives fluid at appropriate pressure levels while the regenerative motor operates. The valve acts as a mediator that reconciles the conflicting requirements of energy recovery and pressure stability.
Solution Approach 2:
The system dynamically adjusts the opening degree of the pressure stabilizing valve based on operating conditions. By changing the valve opening parameter, the system can maintain optimal fluid pressure for recovery operation while accommodating variations in cylinder device operation speed and load conditions. This parameter adjustment enables the system to adapt to different operational states while maintaining pressure stability.
2Loss of energy
If return fluid is diverted through a throttle for regeneration, then energy recovery is improved, but fluid pressure on the primary side becomes unstable
Solution Approach 1:
The fluid flow path is segmented into multiple controlled pathways. The pressure stabilizing valve divides the return fluid flow, directing a portion through the throttle to the regenerative motor while maintaining another portion to support the primary side pressure. This segmentation allows simultaneous operation of energy recovery and pressure stabilization functions.
Solution Approach 2:
The pressure stabilizing valve operates with feedback control to maintain stable fluid pressure. The valve monitors the actual fluid pressure on the primary side and adjusts its opening degree accordingly to counteract pressure fluctuations caused by the throttle diversion. This feedback mechanism ensures that energy recovery through the throttle does not compromise overall system pressure stability.
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 proposed solution achieves energy-saving by stabilizing fluid pressure, allowing appropriate pressure fluid to flow into the recovery passage, and efficiently utilizing energy through the regenerative motor.
Implementation Method 1
a valve that diverts some of a return fluid from the cylinder device to discharge the return fluid via a throttle
Implementation Method 2
some of the return fluid discharged from the bottom chamber is supplied to the regenerative motor to drive a generator, thereby being able to obtain electric energy
Data Source
AI summary
There is provided a fluid pressure circuit capable of saving energy. A fluid pressure circuit includes: a fluid supply source; a cylinder device; a valve that diverts some of a return fluid from the cylinder device to discharge the return fluid via a throttle; and a recovery passage R1 which is provided between the fluid supply source and the cylinder device and through which the return fluid flows from a first chamber of the cylinder device to a second chamber of the cylinder device.