Nested Valve Arrangement in Variable-Displacement Pump
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Solution Overview
Problem
Existing valve arrangements with cartridge designs for hydraulic apparatuses typically accommodate only one valve, leading to increased space requirements when two valves are combined in a single housing, which is inefficient.
Innovation Solution
A compact valve arrangement with a common housing configured as an insertion cartridge, featuring parallel valve bores and connections that can be controlled by multiple control pistons, minimizing space requirements by allowing the cartridge to be inserted partially or entirely into a hydraulic apparatus, such as a variable displacement pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two valves are combined in one housing with flange design, then the number of valves per housing is increased, but the space requirement increases correspondingly
Solution Approach 1:
The patent applies nesting by placing one valve inside another valve housing. The inner valve (e.g., pressure control valve) is positioned within the outer valve housing, allowing two valves to occupy the space of one while maintaining individual functionality. This resolves the contradiction by increasing valve density without proportionally increasing external dimensions.
Solution Approach 2:
The patent transitions from a planar/flange-based arrangement to a three-dimensional nested configuration. By utilizing the internal volume of the outer valve housing rather than arranging valves side-by-side on a surface, the solution achieves higher valve density in the same or reduced space.
2Device complexity
If a single cartridge design is used, then the device complexity is reduced, but the functionality is limited to one valve
Solution Approach 1:
The patent merges two separate valve functions into a single integrated cartridge housing. The outer valve housing serves as both the housing for the outer valve and the containment structure for the inner valve assembly. This consolidation maintains structural simplicity while achieving multi-valve functionality, resolving the contradiction between complexity and versatility.
Solution Approach 2:
The outer valve housing is designed to serve multiple functions: it houses the outer valve, provides structural support for the inner valve assembly, and enables the integrated cartridge to function as a multi-valve unit. This multi-functionality allows a single cartridge design to accommodate multiple valves without requiring separate housings for each.
Data Source
AI summary
A valve arrangement includes at least two valves and a housing which is configured as an installation cartridge. One of the valves is configured as a pressure regulator and the other of the valves is configured as a delivery flow regulator. The valve arrangement is configured to be inserted or screwed into a variable-displacement pump, thereby minimizing the spatial requirement of the valve arrangement.