Hydraulic Prestressed Nonreturn Valve for Die Casting Pressure Boosters
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Solution Overview
Problem
Existing pressure boosters in die casting machines and other work machines face issues with high production costs, impeded flow, and mechanical reliability due to the use of spring prestress in nonreturn valves, which are susceptible to failure.
Innovation Solution
A pressure booster design featuring a valve seat operatively connected to the piston, allowing for a compact and dynamic operation with a nonreturn valve that utilizes hydraulic means for prestressing, eliminating the need for mechanical components and enhancing flow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spring prestress means are used in the nonreturn valve, then the valve can be actuated, but the reliability decreases and production costs increase
Solution Approach 1:
The patent replaces the mechanical spring prestress system with a hydraulic prestress system. The valve seat is acted upon by hydraulic pressure forces instead of mechanical spring forces, eliminating the need for springs and associated mechanical components. This substitution improves reliability by removing failure-prone mechanical elements while reducing device complexity.
Solution Approach 2:
The patent employs hydraulic means to generate the prestress force on the nonreturn valve. A hydraulic prestress force is applied to the valve seat through fluid pressure, replacing the traditional mechanical spring mechanism. This hydraulic approach provides more reliable actuation with fewer moving parts and reduced mechanical complexity.
2Productivity
If traditional nonreturn valve design is used, then basic function is achieved, but flow cross section is impeded and productivity decreases
Solution Approach 1:
The patent implements a dynamic valve seat that can be displaced from an initial position in the axial direction. During the closing stroke, the valve seat moves to close the nonreturn valve, and during the effective working stroke, it is displaced together with the pressure booster piston. This dynamic positioning maintains large flow cross sections when open while enabling effective closure when needed, thus improving productivity without impeding flow.
3Reliability
If valve seat is held with mechanical spring means, then initial position is maintained, but mechanical reliability decreases and service life reduces
Solution Approach 1:
The patent replaces mechanical spring means for holding the valve seat in its initial position with hydraulic means. A hydraulic prestress force acts on the valve seat to maintain its initial position, eliminating the need for mechanical springs. This substitution improves operational reliability by removing susceptible mechanical components and reduces device complexity.
Solution Approach 2:
The patent uses hydraulic pressure to generate the prestress force that holds the valve seat in its initial position. Instead of mechanical springs, fluid pressure is applied to the valve seat through hydraulic connections, providing reliable positioning without mechanical wear or failure. This hydraulic approach enhances service life and operational reliability.
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
The solution enables more dynamic and high-performance operation of casting devices by ensuring reliable sealing and reduced mechanical complexity, increasing operational reliability and service life while maintaining large flow cross sections.
Implementation Method 1
it can be particularly advantageous if hydraulic means are provided, with the aid of which the valve seat can be held hydraulically in its initial position. The hydraulic means can advantageously produce a restoring force, by way of which a displaced valve seat can return automatically into its initial position again.
Implementation Method 2
pressure booster for increasing the pressure in a piston space of a working cylinder, a pressure booster piston forming, together with a valve seat, a pressure booster
Data Source
AI summary
A pressure booster (1) for a die casting machine, comprises a pressure booster piston (4) having a valve seat (7), wherein the pressure booster piston (4) interacts with the valve seat (7) to form a shut-off or non-return valve (6). The valve body (24) is displaceable to a limited extent in the axial direction (a) and can be retained hydraulically in a starting position.