Force Feedback Poppet Valve with Integrated Pressure Compensator
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Solution Overview
Problem
Hydraulic circuits in heavy machinery experience undesirable pressure fluctuations due to interconnected actuators, leading to inconsistent actuator movements and potential component malfunctions, and existing pressure compensation methods increase cost and complexity without precise control.
Innovation Solution
A force feedback poppet valve with an integrated pressure compensator, featuring a main poppet, pilot poppet, and springs to control fluid flow and pressure differentials, providing proportional forces to stabilize fluid pressure and flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pressure compensating valves are used in the hydraulic circuit, then pressure fluctuations are reduced, but device complexity and cost increase
Solution Approach 1:
The patent combines the pressure compensator function with the main poppet valve into a single integrated unit. The pressure compensator is positioned within the valve body and works in conjunction with the main poppet to regulate pressure differentials, eliminating the need for separate pressure compensating valves while maintaining pressure stability.
Solution Approach 2:
The pressure compensator is nested within the main poppet valve structure. The pressure compensator piston moves within the valve body and interacts with the main poppet through shared chambers and passages, allowing one component to be contained within or integrated into another to reduce overall system complexity.
2Reliability
If multiple pressure compensating valves are used in the hydraulic circuit, then pressure fluctuations are reduced, but manufacturing cost increases
Solution Approach 1:
The patent combines the pressure compensator function with the main poppet valve into a single integrated unit. The pressure compensator is positioned within the valve body and works in conjunction with the main poppet to regulate pressure differentials, eliminating the need for separate pressure compensating valves while maintaining pressure stability.
3Reliability
If conventional pressure compensating valves are used, then some pressure control is achieved, but manufacturing precision and control accuracy are insufficient
Solution Approach 1:
The pressure compensator uses a feedback mechanism where the movement of the main poppet in response to pressure differentials is sensed and used to adjust the pressure compensator piston position. This closed-loop feedback enables more precise pressure control by continuously responding to actual pressure conditions rather than relying on fixed compensator settings.
Solution Approach 2:
The pressure compensator piston acts as an intermediary element that translates pressure differential changes into positional adjustments of the main poppet. This intermediary mechanism provides finer control over pressure regulation by using the piston's movement to modulate flow passages and maintain more precise pressure differentials.
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 force feedback poppet valve achieves precise pressure regulation and consistent actuator performance with reduced complexity and cost, effectively mitigating pressure fluctuations and maintaining constant flow rates.
Implementation Method 1
a first spring coupled between the main poppet and the pilot poppet to provide a force proportional to a distance between the main poppet and the pilot poppet
Implementation Method 2
a second spring coupled between the pressure compensator and the pilot poppet to provide a force proportional to a distance between the pressure compensator and the pilot poppet
Implementation Method 3
A force feedback poppet valve includes a valve body having a main chamber, a first port, and a second port. The force feedback poppet valve further includes a main poppet disposed within the main chamber and movable between an open position and a closed position to control fluid flow between the first port and the second port.
Data Source
AI summary
The force feedback poppet valve includes a valve body having a main chamber, a first port, and a second port. The force feedback poppet valve further includes a main poppet disposed within the main chamber and movable between an open position and a closed position to control fluid flow between the first port and the second port. The main poppet forms a control chamber within the main chamber. The force feedback poppet valve further includes a first passage communicating the control chamber with the second port, a second passage communicating the control chamber with the first port, and a pilot valve having a pilot poppet for controlling fluid flow between the control chamber and the first port through the second passage. The force feedback poppet valve further includes a pressure compensator disposed within the main poppet, and fluidly connected to the second port via the first passage. The force feedback poppet valve further includes a first spring coupled between the main poppet and the pilot poppet to provide a force proportional to a distance between the main poppet and the pilot poppet, and a second spring coupled between the pressure compensator and the pilot poppet to provide a force proportional to a distance between the pressure compensator and the pilot poppet.