Modular Piston Accumulator Guide Device Design
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Solution Overview
Problem
The high production costs and complexity of manufacturing storage devices, such as piston accumulators, for various hydraulic systems, due to the need for multiple sizes and designs, which limits efficient and inexpensive production.
Innovation Solution
A modular design using a structurally identical unit of a hollow cylinder guide device and separating piston, allowing different accumulator housing sizes to be achieved with the same tube diameter and varying lengths, where the separating piston delimits media chambers with the guide device and housing parts, enabling efficient and cost-effective production without complex internal machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional piston accumulators are manufactured in various sizes and designs to meet different hydraulic system requirements, then adaptability and versatility are improved, but production costs and manufacturing complexity increase significantly
Solution Approach 1:
The accumulator is divided into modular components: a standard piston assembly (including piston, seals, and guide device) that can be reused across different models, and variable components (housing length, connection ports) that are adapted to specific applications. This segmentation allows the core functional unit to be manufactured once and replicated, reducing overall manufacturing complexity while maintaining adaptability.
Solution Approach 2:
A universal piston assembly design with standardized dimensions, seal configurations, and guide device specifications is created that can be installed in accumulators of various sizes. The piston assembly serves multiple functions (separating gas and liquid, guiding piston motion, sealing) and can be used across different accumulator models, thereby reducing the need for custom manufacturing for each size variant.
2Adaptability or versatility
If traditional piston accumulators are manufactured in various sizes and designs to meet different hydraulic system requirements, then adaptability and versatility are improved, but production costs increase
Solution Approach 1:
The accumulator is divided into modular components: a standard piston assembly (including piston, seals, and guide device) that can be reused across different models, and variable components (housing length, connection ports) that are adapted to specific applications. This segmentation allows the core functional unit to be manufactured once and replicated, reducing overall manufacturing complexity while maintaining adaptability.
Solution Approach 2:
A universal piston assembly design with standardized dimensions, seal configurations, and guide device specifications is created that can be installed in accumulators of various sizes. The piston assembly serves multiple functions (separating gas and liquid, guiding piston motion, sealing) and can be used across different accumulator models, thereby reducing the need for custom manufacturing for each size variant.
3Manufacturing precision
If complex internal machining is performed on accumulator housing to guide the separating piston, then guiding precision is improved, but manufacturing complexity and production time increase
Solution Approach 1:
A separate guide device (guide sleeve or guide bushing) is introduced as an intermediary component between the piston and the accumulator housing. This guide device provides the necessary guiding surfaces and constraints for piston motion, while the housing itself requires minimal internal machining. The guide device can be a simple cylindrical sleeve that fits into a lightly machined recess in the housing, significantly reducing machining complexity while maintaining guiding precision.
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 modular approach reduces production costs and improves operating behavior by minimizing turbulence and allowing for the use of thin-walled, low-cost materials, while ensuring secure contact between the piston and housing, resulting in efficient and cost-effective storage devices.
Implementation Method 1
the separating piston delimits the media chamber with the working fluid with parts of the guide device and with parts of the accumulator housing... the separating piston being guided in a longitudinally movable manner within a guide device
Implementation Method 2
a hollow cylinder as a guide device... the separating piston being guided in a longitudinally movable manner within a guide device, the guide device being arranged within the accumulator housing along its longitudinal axis
Implementation Method 3
the end-side outer contour of the separating piston is convex in shape for the purpose of contacting the concavely shaped inside of the upper part of the housing as soon as the separating piston has reached its one end position, in which the working liquid is completely displaced from the one assignable media space
Data Source
Figure 1~2
AI summary
A piston accumulator has a dividing piston (22) inside an accumulator housing (2) that separates a chamber (28) containing a working gas, such as nitrogen, from a chamber (26) containing a working fluid, such as hydraulic oil. The dividing piston (22) is longitudinally movably guided in a guide tube (24). The guide tube (24) is arranged inside the accumulator housing (2) and extends at least partially along the housing longitudinal axis (10).