Hydraulic Valve Pressure Limiting for Module Adaptability
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Solution Overview
Problem
Hydraulic valve arrangements in vehicles and working machines often require standardized pressure control across multiple valve modules, which can be inflexible and fail to accommodate the unique pressure demands of individual drives, leading to inefficiencies and potential damage from excessive pressure.
Innovation Solution
Implementing a pressure influencing arrangement with a pressure limiting valve that can be set independently for each valve module, allowing for differential control of compensation arrangements based on the specific demands of individual drives, with options for common or individual pressure limiting valves across modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standardized pressure control arrangement is used across all valve modules, then the system structure is simplified and easier to manufacture, but the adaptability to individual drive requirements is reduced
Solution Approach 1:
The pressure control system is segmented into individual pressure limiting valves for each valve module, allowing each module to have independent pressure settings while maintaining overall system integration through the common load-sensing main pipe
Solution Approach 2:
The load-sensing main pipe serves as a universal component that distributes pressure signals to multiple valve modules, enabling both standardized communication and individualized pressure control through module-specific limiting valves
2Adaptability or versatility
If a pressure limiting valve is provided for each valve module, then the adaptability to individual drive demands is improved, but the device complexity increases
Solution Approach 1:
Multiple pressure limiting valves are merged into a unified system architecture that shares the load-sensing main pipe and compensation arrangements, reducing overall complexity while maintaining individual pressure control capabilities
3Measurement precision
If the compensation arrangement is acted upon by multiple different pressures, then the control precision for individual drives is improved, but the difficulty of detecting and measuring pressures increases
Solution Approach 1:
The load-sensing main pipe acts as an intermediary that standardizes pressure signal transmission from multiple sources to the compensation arrangements, simplifying measurement while maintaining precision through centralized pressure management
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 enhances the control possibilities of hydraulic valve arrangements by allowing for tailored pressure settings and limitations for each valve module, ensuring optimal operation and reducing fluid loss by only using pressure as a signal, thereby preventing damage from excessive pressure.
Implementation Method 1
a pressure limiting valve is often used, which opens at a too high pressure and lets hydraulic fluid flow off, until the desired pressure has been reached
Implementation Method 2
a compensation valve, which is acted upon in the opening direction by the force of a spring and the pressure in a load-sensing pipe and in the closing direction by the pressure after the compensation valve
Data Source
AI summary
The invention concerns a hydraulic valve arrangement (1) with at least two valve modules (2-6), each having a supply channel arrangement with a high-pressure channel (9) and a low-pressure channel (15), a working connection arrangement with at least one working connection (A, B), one directional valve arrangement (16) between the supply channel arrangement (9, 15) and the working connection arrangement (A, B) and a compensation arrangement (19), which is acted upon by a pressure in a load-sensing arrangement. It is endeavored to increase the number of control possibilities. For this purpose, the load-sensing arrangement of at least one valve module (2-6) has a pressure influencing arrangement (25-29) that differs from a pressure influencing arrangement (25-29) of a load sensing arrangement of another valve module (2-6).