Stacked Pump Case Valve Chamber Pressure Direction
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Solution Overview
Problem
In hydraulic actuators, the pressure exerted on the stacking surface of the pump case and manifold can lead to a decrease in rigidity, potentially causing gaps and reducing the effectiveness of the system, especially when additional valves are accommodated in the pump case.
Innovation Solution
A pump device design where a second case with an actuation valve is stacked on a first case with a check valve, featuring a valve chamber with a pressure-receiving surface that directs hydraulic fluid pressure towards the first case, and a covering member to resist pressure, reducing the load on the stacked surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple valves are accommodated in the pump case, then the device functionality is improved, but the rigidity of the pump case decreases
Solution Approach 1:
The pump device is divided into a pump case and a separate manifold that are stacked together. The valve chambers are formed in the manifold rather than the pump case, segmenting the functional components from the structural support components. This allows the pump case to maintain its rigidity while the manifold accommodates multiple valves with their respective chambers.
Solution Approach 2:
The valve chambers are positioned in the manifold stacked in the vertical direction (another dimension) rather than being distributed throughout the pump case volume. This dimensional arrangement allows multiple valves to be accommodated without compromising the horizontal rigidity of the pump case structure.
2Adaptability or versatility
If valve chambers are formed in the pump case to accommodate additional valves, then the device functionality is improved, but pressure acts on the stacking surface causing gaps
Solution Approach 1:
The valve chambers are extracted from the pump case and relocated to the manifold. This separation removes the source of pressure-induced deformation from the pump case structure, preventing gaps from forming at the stacking surface while still allowing valve chambers to exist for accommodating multiple valves.
Solution Approach 2:
The manifold acts as an intermediary component between the pump case and the valve chambers. It provides a dedicated structure for housing valve chambers and accommodating valves, mediating the functional requirements without compromising the structural integrity of the pump case.
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 reduces pressure on the stacked surface, enhancing the rigidity and preventing gaps, thereby improving the hydraulic actuator's performance and reliability.
Implementation Method 1
a valve chamber, accommodating the actuation valve, of the second case has a surface on which pressure of the hydraulic fluid that acts on the valve chamber acts toward the first case
Data Source
AI summary
A first case accommodating a first check valve of a switching valve switching a flow of hydraulic fluid to one of a first chamber and a second chamber of a cylinder device, an inside of which is segmented into the first chamber and the second chamber by a piston, and a second case which is stacked on the first case and in which a first actuation valve of the switching valve is accommodated to be displaced in a direction of stacking the first case are provided. A first valve chamber, accommodating the first actuation valve, of the second case has a pressure receiving surface on which pressure of hydraulic fluid that acts on the first valve chamber acts toward the first case.