Multi-hydraulic Control Circuit Pressure Compensator
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Solution Overview
Problem
Multi-control hydraulic circuits face operational inflexibility during transitional phases due to rigid pressure control, limiting their flexibility and effectiveness, especially when modules are shut down or activated.
Innovation Solution
Incorporating a pressure compensator with a fluid link connecting the control line to the outlet, irrespective of the plunger position, allowing for progressive pressure buildup through fluid exchange between receivers, and featuring a lateral passage with a variable cross-section that opens beyond a separation zone, enhancing operational flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pressure compensator with a fluid link connecting the control line to the outlet is used, then operational flexibility is improved by allowing control pressure to vary based on different receiver loads, but device complexity increases due to the additional fluid link and choke components
Solution Approach 1:
A fluid link equipped with a choke is introduced as an intermediary element connecting the control line to the outlet of the pressure compensator. This fluid link acts as a mediator that allows progressive pressure buildup by controlling fluid exchange between receivers, enabling the control pressure to vary based on different receiver loads rather than being limited to the maximum pressure imposed by the receiver with the highest load.
2Ease of manufacture
If the fluid link traverses the plunger with a permanent connection, then ease of manufacture is improved by simplifying implementation, but reliability may be affected by the permanent opening irrespective of plunger position
Solution Approach 1:
The fluid link is segmented into two distinct passages: a lateral passage that opens out into the outlet with a variable cross-section depending on the plunger position, and a transverse passage that provides a permanent connection. The lateral passage is segmented by a separation zone that closes it when the outlet pressure is less than the control pressure, while the transverse passage remains permanently open to ensure continuous fluid exchange and progressive pressure buildup.
3Measurement precision
If the lateral passage has a variable cross-section that closes when outlet pressure is less than control pressure, then pressure control precision is improved during transitional phases, but device complexity increases due to the separation zone mechanism
Solution Approach 1:
The lateral passage is designed with a variable cross-section that dynamically adjusts based on the plunger position and pressure differential. When the outlet pressure is less than the control pressure, the separation zone closes the lateral passage, preventing direct communication. When pressures equalize or reverse, the lateral passage opens to allow fluid exchange. This dynamic behavior enables precise pressure control during transitional phases without requiring complex external control mechanisms.
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 provides a flexible operation by allowing control pressure to vary based on the load of different receivers, reducing sudden pressure variations and improving the circuit's ability to handle changes in module states, thus enhancing the overall control of the hydraulic system.
Implementation Method 1
one face of which is exposed to the control pressure of the control line, and the other face of which transmits this pressure to the outlet of the distributor
Implementation Method 2
the pressure compensator has a fluid link equipped with a choke and connecting the outlet to the control line
Implementation Method 3
delivering the hydraulic fluid at the regulated pressure to the outlet of the distributor which supplies the associated receiver via a non-return valve
Data Source
AI summary
A multi-control hydraulic circuit supplies receivers with hydraulic fluid delivered by a pump with an output controlled by the pressure of a control line depending on a load pressure of the receivers, and delivers the hydraulic fluid at a regulated pressure. The hydraulic circuit consists of hydraulic modules each associated with a receiver having a distributor which regulates the variable output supplying the receiver via a pressure compensator connected at its inlet to the outlet of the variable choke of the distributor, and at its outlet. The plunger manages the connection between its inlet and its outlet. The pressure compensator has a fluid link equipped with a choke and connects the outlet to the control line, irrespective of the position of the plunger.