Hydraulic Cylinder Valve Mounting with Nested Connection Element
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Solution Overview
Problem
Cylinder-side mounted hydraulic valves in mobile hydraulic systems face challenges such as high costs, space constraints, and potential deformations due to high pressure forces, leading to safety and functionality issues.
Innovation Solution
A hydraulic cylinder with a connection pipe that encloses a cylindrical connecting element with radial holes, allowing for a secure and space-efficient mounting of the valve device without the need for bulky screw bolts, ensuring a tight seal and absorption of pressure forces within the valve housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If valve assembly is mounted directly on hydraulic cylinder using traditional connection block with bolts, then hose-rupture safety is achieved, but the valve and connection block become large and bulky due to high pressure forces requiring large bolts
Solution Approach 1:
The connection element is inserted into and enclosed by the cylindrical opening of the valve assembly, creating a nested structure where the connection element fits within the valve housing. This nesting allows the valve assembly to enclose the connecting pipe, containing pressure forces within the valve housing and eliminating the need for large external bolting structures.
Solution Approach 2:
A connecting element with radial holes serves as an intermediary component between the hydraulic cylinder port and the valve assembly. This intermediate element facilitates fluid connection while allowing the valve housing to enclose and contain the connection, distributing pressure forces along the enclosed structure rather than concentrating them on external bolts.
2Device complexity
If valve assembly is mounted directly on hydraulic cylinder, then distributed valve system simplifies hydraulic piping, but mounting space on cylinder is very limited and mounting cost increases
Solution Approach 1:
The connecting element with radial holes is nested within the cylindrical opening of the valve assembly, allowing the valve to be mounted directly on the cylinder port without requiring additional external mounting structures. This nested configuration minimizes the space required on the cylinder surface while maintaining functional connectivity.
3Strength
If valve is fastened with several large bolts to withstand high pressure forces, then connection strength is sufficient, but deformations in valve housing can occur causing changes to spool that endanger valve functioning and machine safety
Solution Approach 1:
The connection element is enclosed within the valve housing, distributing the high pressure forces along the enclosed structure rather than concentrating them on external bolts. This eliminates deformations in the valve housing that could alter spool clearance, maintaining manufacturing precision and valve functionality while still withstanding high pressure forces.
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 eliminates the risk of valve slide damage, reduces the complexity and length of hydraulic piping, and enhances safety by providing a reliable and compact valve assembly that simplifies hose routing and reduces the number of hoses required.
Implementation Method 1
at least two seals being arranged such that they tightly seal the first radial fluid opening on both sides, so that a tight connection is created between the first cylinder port connection and the first radial fluid opening
Data Source
Figure 1a~1b
Figure 2~3
Figure 4
AI summary
The invention relates to a valve device for mounting on a hydraulic cylinder having a first cylinder port, wherein the valve device has a first cylinder port connection (A') for the connection to the first cylinder port on the hydraulic cylinder, wherein the first cylinder port connection (A') is arranged such that it is optionally connected via a directional valve (22, 36) to a first pressure connection (P1) on the pressure side of the hydraulic pump or to a first tank connection (T1) to a tank. The valve device has a first cylindrical opening (21A) for enclosing a cylindrical connecting element (15), which has a first radial fluid opening (18) which is connected to the first cylinder port, wherein the cylindrical opening (21A) contains the first cylinder port connection (A') on the inside and wherein two seals (28, 30) are arranged such that they seal off the first radial fluid opening (18) so tightly on both sides that a tight connection is produced between the first cylinder port connection (A') and the first radial fluid opening (18) when the connecting element (15) is inserted into the first cylindrical opening (21A).