Hydraulic Distributor Inlet Section With Variable Pressure Margin
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic distributor systems with fixed displacement pump configurations experience significant energy loss and thermal dissipation in stand-by conditions, leading to inefficient energy use and unnecessary power dissipation, particularly in applications requiring reduced hydraulic performance.
Innovation Solution
An inlet section for hydraulic distributors is designed with a valve body, slider, and control device that allows for a controlled reduction of pressure margin, enabling better energy balance and reduced thermal dissipation by selectively managing the flow between high and low pressure lines through a mechanical actuator and spring system, allowing for fast and slow control configurations and continuous proportional control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a pressure compensator is used to discharge pump flow in stand-by conditions, then the pump flow can be discharged, but energy loss and thermal dissipation increase due to the pressure margin required for compensator operation
Solution Approach 1:
The patent changes the pressure parameter by allowing the pressure margin to vary dynamically. The pressure compensator operates with a reduced pressure margin in stand-by conditions compared to operating conditions, thereby reducing energy loss while maintaining sufficient flow discharge capability. This is achieved through the load-sensing mechanism that adjusts the pressure margin based on actual system demands.
Solution Approach 2:
The patent implements a dynamic pressure margin adjustment mechanism where the pressure compensator adapts its operation based on system conditions. The load-sensing system continuously monitors pressure requirements and adjusts the compensator's pressure margin accordingly, transitioning between different operational states to optimize energy efficiency while ensuring reliable flow discharge when needed.
2Reliability
If a fixed pressure margin is maintained in the pressure compensator, then reliable flow discharge is ensured, but energy efficiency decreases due to continuous pressure drop
Solution Approach 1:
The patent implements variable pressure margin operation where the pressure compensator adjusts its pressure drop parameter based on system demands. In stand-by conditions, the pressure margin is reduced to minimize energy loss, while in operating conditions, the pressure margin increases to ensure sufficient flow discharge capability. This dynamic parameter adjustment resolves the contradiction between reliability and energy efficiency.
Solution Approach 2:
The load-sensing system automatically adjusts the pressure margin based on actual system requirements without external intervention. The pressure compensator self-regulates its operation by monitoring the pressure differential between pump output and system demand, reducing the pressure margin when full discharge capability is not needed, thereby improving energy efficiency while maintaining adequate reliability.
3Loss of energy
If a second discharging device and pilot valve are added to manage low pressure discharge, then stand-by energy loss is reduced, but device complexity increases significantly
Solution Approach 1:
The patent makes the pressure compensator multi-functional by enabling it to perform both high-pressure flow discharge in operating conditions and low-pressure flow discharge in stand-by conditions. The load-sensing mechanism allows the same compensator to adapt its pressure margin and discharge characteristics based on system demands, eliminating the need for separate discharging devices and reducing overall system complexity while maintaining energy efficiency.
Solution Approach 2:
The patent merges the functions of multiple discharging devices into a single pressure compensator operated by a load-sensing system. Instead of having separate high-pressure and low-pressure discharging paths with multiple control valves, the invention combines these functions into one adaptive compensator that automatically adjusts its operation mode, thereby reducing device complexity while achieving the same energy-saving objectives.
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 solution reduces energy losses and thermal dissipation in stand-by conditions, enabling efficient energy use and flexible control of hydraulic systems, while maintaining a simpler and more compact structure compared to existing solutions.
Implementation Method 1
said first area being subjected to action of a first pressure fed by the high pressure line and acting in a direction such as to push the slider towards the second position
Implementation Method 2
said second area being subjected to a second pressure fed by a line for detecting a highest load pressure required by uses placed downstream of the distributor and said second pressure acting in the opposite direction to said first pressure
Implementation Method 3
a main spring active on the second area of the slider in a direction consistent with action of the second pressure
Implementation Method 4
a control spring active on the fourth area opposed to the main spring
Data Source
AI summary
An inlet section for use in a hydraulic distributor including a valve body and a slider with a first area and a second area. The inlet section further including said slider being longitudinally slidable within the valve body between a first position in which it prevents passage of fluid from a high pressure line to a low pressure line, and a second position in which it enables passage of fluid. The inlet section further including a main spring active on the second area of the slider in a direction consistent with action of the second pressure and a control device of the slider. The control device of the slider includes a mechanical actuator member selectively active on the slider in a direction consistent with the action of the first pressure on the first area of the slider so as to force the slider in the second position.