Nested Hydraulic Cylinder Pressure Intensification for High Force
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Solution Overview
Problem
Conventional hydraulic cylinders are limited by the pressure and flow input from hydraulic pumps and valves, restricting their maneuverability and requiring larger cylinders for higher force applications, which results in slower extension and retraction.
Innovation Solution
The intrascopic arrangement of multiple cylinders within each other creates its own pressure higher than conventional hydraulic circuits, transforming the cylinder into a cylinder-pump capable of producing great force while maintaining a smaller, lighter, and faster design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a larger hydraulic cylinder is used to produce greater force, then the force output is improved, but the extension and retraction speed decreases
Solution Approach 1:
The patent implements a nested cylindrical structure where an inner cylinder with its own piston-rod assembly is positioned inside the outer cylinder. The inner cylinder's rod extends through the outer cylinder's piston, creating a compact nested arrangement. This nesting allows the system to achieve greater force multiplication through the combined action of both cylinders while maintaining a compact size that preserves extension and retraction speed characteristics
2Force
If a conventional hydraulic cylinder is used with standard pressure input, then the system is simple, but the force output is limited
Solution Approach 1:
The nested dual-cylinder configuration integrates two complete hydraulic cylinder systems (each with cylinder, piston, and rod) within a single compact envelope. The inner cylinder assembly is positioned within the outer cylinder, with the inner rod extending through the outer piston. This nesting achieves force multiplication without requiring external intensifiers or complex multi-stage systems
3Speed
If a smaller hydraulic cylinder is used for faster operation, then the speed is improved, but the force output decreases
Solution Approach 1:
The nested configuration allows the system to maintain the compact size and fast response characteristics of smaller cylinders while achieving the force output of larger cylinders. The inner cylinder operates within the outer cylinder's volume, enabling the system to deliver high force through combined piston areas without increasing the overall envelope size, thus preserving speed characteristics
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 solution enables the hydraulic cylinder to achieve greater forces and variable speeds without the need for external intensifiers or secondary hydraulic lines, making it suitable for a wide range of applications where conventional cylinders are inadequate.
Implementation Method 1
As these volumes are pressurized, hydrostatic forces due to the pressurized fluid act on the surfaces of the vessel containing the fluid. Thus, the forces acting on the piston-rod assembly cause it to move
Implementation Method 2
The intrascopic arrangement of multiple cylinders within each other creates its own pressure higher than what is supplied by conventional hydraulic circuits. This transforms a cylinder into a cylinder-pump
Data Source
AI summary
A hydraulic cylinder (1) which acts as a cylinder hollow rod in an outer hydraulic cylinder (10) is disclosed comprising an inner rod (4) with a piston (2) and piston-gland (3) wherein the cylinder hollow rod (1) is held longitudinally displaceably in the cylinder housing (10). The system additionally has a cylinder base (5) and a fibre cover (14) on the outer casing of hydraulic cylinder (10). The system also has ports for fluid (11, 12 and 13) corresponding to four chambers, (67, 8 and 9 respectively). According to the invention, when pressure is applied to chamber (7), the internal rod (4) extends into the chamber (6), displacing its mass and dramatically increases the pressure in Chamber (6). This displacement is effectively an internal pump which can be activated multiple times within a given stroke of rod (1).