Hydraulic Drive Valve Control Without Pressure Compensation Loss
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Solution Overview
Problem
The existing hydraulic control device experiences energy consumption inefficiencies due to pressure loss caused by pressure compensation valves, especially when multiple hydraulic actuators operate simultaneously, leading to uneven flow rates.
Innovation Solution
A hydraulic drive system with a control device that manages the opening degrees of meter-in and meter-out control valves and a merge valve to eliminate the need for pressure compensation valves by adjusting flow rates based on actuator loads and operation commands, allowing for efficient fluid distribution between multiple hydraulic actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure compensation valves are provided for each hydraulic actuator to maintain even flow rates during simultaneous operation, then flow rate uniformity is improved, but energy consumption increases due to pressure loss
Solution Approach 1:
The invention extracts and eliminates the pressure compensation valves from the hydraulic circuit. Instead of having pressure compensation valves for each actuator, the system uses a central controller that coordinates the operation of multiple actuators to avoid simultaneous high-flow operations, thereby removing the need for pressure compensation valves and eliminating their associated pressure losses and energy consumption.
Solution Approach 2:
The system dynamically adjusts the operation timing and flow distribution to multiple hydraulic actuators based on real-time operational requirements. The controller dynamically prevents simultaneous full-flow operation of multiple actuators, adapting the flow distribution to maintain uniformity without requiring static pressure compensation valves.
2Ease of operation
If pressure compensation valves are installed to control flow rates during simultaneous actuator operation, then flow rate control is improved, but device complexity increases
Solution Approach 1:
The invention removes pressure compensation valves from each actuator circuit, significantly simplifying the valve configuration. Flow rate control is achieved through centralized operational coordination rather than through complex individual valve assemblies for each actuator.
Solution Approach 2:
The central controller performs multiple functions: it coordinates actuator operation timing, manages flow distribution, and prevents simultaneous high-flow conditions. This single multi-functional control system replaces what would otherwise require multiple pressure compensation valves, reducing overall system complexity.
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
This approach reduces energy consumption by optimizing fluid flow and eliminating the need for pressure compensation valves, enhancing the efficiency of the hydraulic drive system during simultaneous actuator operations.
Implementation Method 1
a first hydraulic pump that supplies the working fluid to the first circuit system
Implementation Method 2
a first meter-in control valve that controls a meter-in flow rate of the working fluid that flows to the first hydraulic actuator
Implementation Method 3
a first meter-out control valve that controls a meter-out flow rate of the working fluid that is drained from the first hydraulic actuator into a tank
Data Source
AI summary
This hydraulic drive system includes: first and second circuit systems; first and second hydraulic pumps; a merge valve that opens and closes a merge passage connecting the hydraulic pumps; an operation device that outputs an operation command corresponding to an amount of operation specifying an amount of actuation of first and second hydraulic actuators; and a control device that controls the merge valve according to the operation command from the operation device. The first circuit system includes: a first meter-in control valve that controls a meter-in flow rate of the working fluid that flows to the first hydraulic actuator; and a first meter-out control valve that controls a meter-out flow rate of the working fluid that is drained from the first hydraulic actuator into a tank. The control device controls an opening degree of the first meter-in control valve and an opening degree of the first meter-out control valve.