Directional Valve Slide With Integrated Residual Pressure Relief
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Solution Overview
Problem
Existing directional valves require significant constructive effort and increased dimensions to achieve reliable residual pressure relief, particularly in systems with fluid consumers, due to the need for additional components like residual pressure relief valves or aeration seal rings.
Innovation Solution
Integrate a check valve into the slide body of the valve slide, forming a receiving chamber connected via a connecting channel to a feed longitudinal section, with a valve seat opposing an overflow opening linked to a relief channel, allowing for compact and mechanically simple residual pressure relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional components like residual pressure relief valves or aeration seal rings are used to achieve reliable residual pressure relief, then the reliability of residual pressure relief is improved, but the device complexity and dimensions increase
Solution Approach 1:
The check valve is integrated directly into the slide body of the directional valve, merging two functions (directional control and residual pressure relief) into a single component. This eliminates the need for separate residual pressure relief valves or aeration seal rings, thereby reducing device complexity and overall dimensions while maintaining reliable residual pressure relief through the check valve mechanism
2Reliability
If a separate residual pressure relief valve is attached to the main valve, then the reliability of residual pressure relief is improved, but the volume and dimensions of the valve arrangement increase
Solution Approach 1:
The check valve is incorporated within the existing slide body structure of the directional valve, eliminating the need for an externally attached residual pressure relief valve. This integration significantly reduces the overall volume and dimensions of the valve arrangement while ensuring reliable residual pressure relief through the integrated check valve mechanism
3Reliability
If multiple separate components are used for residual pressure ventilation, then the reliability of ventilation is improved, but the ease of manufacture decreases due to increased assembly complexity
Solution Approach 1:
The check valve is designed as an integrated component within the slide body, reducing the total number of separate parts that need to be manufactured and assembled. This integration simplifies the manufacturing process and assembly operations while maintaining reliable residual pressure ventilation through the check valve mechanism
Solution Approach 2:
The slide body is segmented into functional zones including a receiving chamber for the check valve member, connecting channels for fluid communication, and a valve seat with overflow opening. This functional segmentation within the integrated structure allows for optimized manufacturing of each zone while maintaining overall simplicity
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 design enables efficient and compact residual pressure relief with minimal components, suitable for multidirectional valves, and supports safety functions like STO category 3 Pld, while maintaining compact dimensions.
Implementation Method 1
a check valve, having a check valve member, which is movable relative to the slide body depending on the applied pressure difference
Data Source
AI summary
A directional valve including a valve housing, in which a slide receiving space is formed extending in a longitudinal direction and limited radially outwards by a peripheral receiving space boundary surface, in which a plurality of valve channels open, which pass through the valve housing and are spaced in the longitudinal direction at points in the peripheral receiving space boundary surface, and in which a valve slide, having at least one slide body, is arranged, which is displaceable in the longitudinal direction between a plurality of switch positions by executing a switching movement, and with at least one check valve member, which is movable relative to the slide body depending on the applied pressure difference, a receiving chamber is formed in the slide body. The check valve member is arranged axially movable and which is connected to the feed channel via a connecting channel formed in the slide body.