Hydraulic Valve Piston Radial Bore Segmentation
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Solution Overview
Problem
The existing hydraulic cartridge valve's maximum flow rate is limited, particularly along the first fluid flow path, which restricts its efficiency in pressure regulation at the working connection point.
Innovation Solution
The piston incorporates additional radial bores for both fluid flow paths, allowing for specific adaptation to flow conditions, along with sealing rings and control edges that adjust the flow path cross-sectional area, and a prestressed spring to manage piston position and fluid flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the piston uses shared radial bores for both fluid flow paths, then the device complexity is reduced, but the maximum flow rate is limited
Solution Approach 1:
The piston is segmented with separate radial bores for the first and second fluid flow paths. The third radial bore serves the first fluid flow path while the fourth radial bore serves the second fluid flow path, allowing independent optimization of each flow path without interfering with the other, thereby increasing the maximum flow rate capability
Solution Approach 2:
Different radial bores are provided at different locations on the piston to match the specific flow conditions of each fluid path. The third radial bore is positioned to optimize flow from the inlet connection point, while the fourth radial bore is positioned to optimize flow to the return connection point, allowing each bore to be specifically adapted to its assigned flow conditions
2Measurement precision
If the piston position is fixed, then the device complexity is reduced, but the pressure regulation precision deteriorates
Solution Approach 1:
The piston is designed to be linearly movable within the first longitudinal bore, transitioning between a first end position and a second end position. This dynamic positioning allows the piston to selectively open or close the first and second fluid flow paths by moving the third and fourth radial bores into or out of alignment with the longitudinal bore, enabling precise pressure regulation through controlled flow path adjustment
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 configuration enhances the maximum possible flow rate and allows for precise pressure regulation at the working connection point by selectively opening and closing fluid flow paths, improving the valve's operational efficiency.
Implementation Method 1
a prestressed spring is provided, which bears against the piston in such a way that it is loaded in the sense of a movement towards the working connection point
Implementation Method 2
the pressure at the working connection point loads the piston in the direction of the longitudinal axis
Data Source
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Figure 2
AI summary
The invention relates to a hydraulic inset valve (10) with a bushing (20) having a first longitudinal bore (24) which forms a working connection point (21) by means of an end-face opening, wherein a piston (40) is linearly movably received in the first longitudinal bore (24), wherein the bushing (20) is penetrated in the region of an inlet connection point (22) by at least one first radial bore (25) extending radially to the longitudinal axis (11), wherein the bushing (20) is penetrated in the region of a return connection point (23) by at least one second radial bore (26) extending radially to the longitudinal axis (11), which is arranged spaced apart in the direction of the longitudinal axis (11) from the at least one first radial bore (25), wherein a first fluid flow path (12) extends from the inlet connection point (22) to the working connection point (21), wherein a second fluid flow path (13) extends from the working connection point (21) to Return connection point (23) extends.According to the invention, the piston (40) has at least one third radial bore (42) which extends radially to the longitudinal axis (11) and is part of the first fluid flow path (12), wherein the piston (40) has at least one fourth radial bore (43) which extends radially to the longitudinal axis (11) and is part of the second fluid flow path (13), and wherein it is spaced apart in the direction of the longitudinal axis (11) from the at least one third radial bore (42).