Pressure Intensifier Piston Layout Without Check Valve Delay
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Solution Overview
Problem
Conventional pressure intensifier devices for diecasting machines are prone to high production costs, wear, and failure due to the use of check valves, which also introduce time delays and inefficiencies in pressure increase.
Innovation Solution
A pressure intensifier device without a check valve, where the piston rod can move unhindered into the outlet region to provide pressure increase, with a passage cross section equal to the rod cross section, and controlled by an independent inlet valve, allowing early initiation of the piston's forward motion and minimizing production complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check valve is installed in the pressure intensifier device to prevent return flow, then the pressure medium can be contained in the pressurized fluid chamber, but the device complexity increases and production costs rise
Solution Approach 1:
The invention extracts and eliminates the check valve from the pressure intensifier device. Instead of using a mechanical check valve to prevent return flow, the patent uses the piston rod's movement to control fluid flow direction, thereby removing the complex valve mechanism while maintaining pressure containment functionality
Solution Approach 2:
The piston rod serves as an intermediary element that performs the function previously assigned to the check valve. By positioning the piston rod to block or allow flow paths between chambers, it mediates the pressure containment function without requiring additional valve components
2Reliability
If a check valve is installed to prevent return flow, then pressure containment is improved, but time delays in pressure increase occur
Solution Approach 1:
The check valve is removed to eliminate the time delay associated with valve opening and closing operations. The piston rod provides immediate flow path control as it moves, eliminating the mechanical response time required by valve mechanisms
Solution Approach 2:
The piston rod is positioned in advance to establish the flow path before pressure increase is needed. By pre-positioning the piston rod to allow or block flow paths, the system eliminates the time delay that would occur if a valve had to be actuated at the moment pressure increase is required
3Ease of operation
If the outlet region has a smaller passage cross section to guide the piston rod, then the piston rod can be guided into the outlet region, but the free passage cross section for pressure medium flow is reduced
Solution Approach 1:
The outlet region is segmented into distinct functional zones: a guidance portion with smaller cross section for piston rod alignment and a flow portion with larger cross section for pressure medium flow. This segmentation allows each zone to optimize its specific function without compromising the other
Solution Approach 2:
The outlet region transitions from a two-dimensional cross-sectional view to a three-dimensional graduated structure. The passage cross section varies along the axial direction, being smaller at the inlet end for guidance and larger at the outlet end for flow, creating a tapered or stepped geometry that resolves the contradiction between guidance and flow capacity
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 production costs, minimizes wear, eliminates time delays, and enhances pressure rise times, improving the efficiency and quality of the diecasting process.
Implementation Method 1
a pressure intensifier device for increasing pressure in a pressurized fluid chamber of a piston/cylinder unit
Data Source
AI summary
A pressure intensifier device increases pressure in a pressurized fluid chamber of a piston/cylinder unit. The pressure intensifier device has a pressure intensifier cylinder and a pressure intensifier piston, which is guided in an axially movable manner in the cylinder, wherein the pressure intensifier cylinder has an outlet region, an inlet region upstream of the outlet region and a piston guiding chamber, and the pressure intensifier piston has a piston part, which is guided in the piston guiding chamber, and a piston rod, which extends from the piston part to the inlet region, in a maximally retracted release position releases a fluid connection between the inlet region and the outlet region and, in a maximally advanced blocking position, blocks this connection with a free end portion, with which it extends into the outlet region. Over a portion that can be passed through by the free end portion of the piston rod during movement from the release position into the blocking position, the outlet region has a free passage cross section for the free piston rod end portion that is at least equal in size to a rod cross section of the free piston rod end portion. A pressure intensifier inlet valve can be controlled independently of a pressure in the pressurized fluid chamber of the piston/cylinder unit.