Segmented Hydraulic Cylinder for Force-Speed Switching
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Solution Overview
Problem
Hydraulic cylinders used in forming machines require high drive power to achieve both large forces and long travel paths, leading to inefficiencies and increased energy consumption.
Innovation Solution
The hydraulic cylinder is designed with divided partial chambers that allow for adjustable actuation, enabling either rapid piston advancement under low force or slow advancement under high force by varying the fluid admission to the chambers, optimizing drive power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic cylinders are designed to provide both large forces and long travel paths, then the required drive power increases significantly
Solution Approach 1:
The cylinder chamber is divided into two hydraulically separable partial chambers (first and second partial chambers), allowing independent control of fluid admission to each chamber. This segmentation enables selective actuation modes: rapid advancement under low force by admitting fluid to only one chamber, or slow advancement under high force by admitting fluid to both chambers, thereby resolving the contradiction between force and power requirements
2Force
If fluid is admitted to both partial chambers simultaneously, then high piston force is achieved but piston advancement speed decreases
Solution Approach 1:
The hydraulic system allows dynamic switching between different operating modes by controlling fluid admission to the partial chambers. The valve assembly enables selective connection of each partial chamber to the fluid supply, allowing the system to adapt between high-force slow-speed mode (both chambers pressurized) and high-speed low-force mode (one chamber pressurized), thus dynamically resolving the force-speed trade-off
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 drive power requirements while maintaining performance, enabling flexible operation and energy savings in forming machines, particularly in temperature-critical materials processing.
Implementation Method 1
a piston element (3) having an active surface (5, 7), on which a working pressure can act in order to press the piston element (3) in a working direction (W)
Data Source
AI summary
A hydraulic cylinder comprising a cylinder, a piston element movably guided in the cylinder in a working direction and comprising an active surface, and a first opening for feeding a fluid into a cylinder chamber by the active surface. A working pressure of the fluid acting on the active surface drives the piston element in the working direction. The active surface includes a first partial surface and at least one second partial surface, the cylinder chamber being divided into a first sub chamber with the first opening by the first active surface and a second partial surface with a second opening by the second partial surface, and the partial surfaces are hydraulically separated from each other at least in a selectable operating mode.