Hydraulic Valve Controller Regenerative Flow Interruption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic valve arrangements face challenges in efficiently managing regenerative flow and maintaining optimal actuator performance under varying load conditions, particularly when feed pressure exceeds predetermined levels, leading to potential cavitation and back-pressure issues.
Innovation Solution
The hydraulic valve arrangement incorporates a controller that interrupts the regenerative flow path when feed pressure exceeds a set level, using a check valve to ensure correct flow direction and adjusts flow demands between valves to maintain optimal pressure ratios, and transitions to independent metering when necessary, preventing cavitation and back-pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If regenerative flow path is established to improve energy efficiency, then energy recovery is enhanced, but feed pressure control deteriorates when pressure exceeds predetermined levels
Solution Approach 1:
The controller acts as an intermediary between the regenerative flow path and the hydraulic system. It monitors feed pressure and selectively interrupts the regenerative flow path when pressure exceeds predetermined levels, mediating between the energy recovery benefit and the pressure control requirement
Solution Approach 2:
The system dynamically switches between regenerative flow mode and interrupted regenerative flow mode based on real-time pressure conditions. The controller adjusts the flow path configuration dynamically to optimize both energy recovery and pressure control under varying operating conditions
2Force
If regenerative flow is used to improve actuator performance, then force generation is enhanced, but cavitation risk increases when feed pressure is insufficient
Solution Approach 1:
The controller implements feedback control by continuously monitoring feed pressure and adjusting the regenerative flow path accordingly. When feed pressure drops below safe levels, the controller interrupts the regenerative flow path to prevent cavitation, while maintaining actuator force generation through alternative flow paths
3Ease of operation
If independent metering control is implemented to improve load independence, then actuator control precision is enhanced, but system complexity increases
Solution Approach 1:
The controller serves multiple functions: it manages regenerative flow path interruption, monitors feed pressure, prevents cavitation, and provides independent metering control. By consolidating these functions in a single controller, the system achieves load-independent actuator control without proportionally increasing 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 solution ensures load-independent actuator control, prevents cavitation, and maintains optimal performance by adjusting flow demands and using a check valve to manage regenerative flow effectively, enhancing the hydraulic valve arrangement's functionality.
Implementation Method 1
a check valve is arranged in said regenerative flow path. This check valve automatically ensures the correct flow direction. If the feed pressure at one working port exceeds the pressure at the other working port receiving hydraulic fluid from the actuator there is no flow back from the feeding working port to the receiving working port.
Implementation Method 2
said controller interrupts said regenerative flow path when a feed pressure at said working port arrangement exceeds a predetermined pressure level
Implementation Method 3
A hydraulic valve arrangement comprises a supply port arrangement having a high pressure port and a low pressure port
Data Source
Figure 1~3
AI summary
A hydraulic valve arrangement (1) is provided comprising comprising a supply port arrangement having a high pressure port (2) and a low pressure port (4), a working port arrangement having two working ports (6, 7), a first valve (13) arranged between said high pressure port (2) and said working port arrangement (6, 7), a second valve (14) arranged between said low pressure port (4) and said working port arrangement (6, 7), a controller (19) for controlling said first valve (13) and said second valve (14), said controller (19) having an input connection (20) for receiving a signal of an operator input device, and a regenerative flow path which can be established by means of at least one of said first valve (13) and said second valve (14). The function of such a hydraulic valve arrangement should be enhanced. To this end said controller (19) said controller interrupts said regenerative flow path when a feed pressure at said working port arrangement (6, 7) exceeds a predermined pressure level.