Bladder Accumulator Housing Segmentation for Axial Strength
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Solution Overview
Problem
Existing methods for producing bladder accumulators face challenges in achieving high strength values while maintaining cost-effectiveness, often requiring large access openings for valve insertion and resulting in uneven fiber winding designs that compromise strength and increase production costs.
Innovation Solution
The method involves extruding a plastic tube over the bladder, integrating it into a mold to shape the plastic core container, and then winding it with plastic fibers, allowing for smaller access openings and a more even fiber distribution, which enhances axial strength and reduces production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If large access openings are provided in the accumulator housing for valve insertion, then valve installation is facilitated, but the fiber layer composite has weaknesses and axial strength is reduced
Solution Approach 1:
The housing is divided into a tubular central part and separate cap parts. The caps are detached from the central part during production, allowing valve insertion through the cap rather than through large openings in the main housing body. This segmentation enables small opening sizes while maintaining housing strength.
Solution Approach 2:
Valves are inserted into the caps before the caps are attached to the central part. This preliminary action allows valve installation to be performed when the opening is still accessible, avoiding the need for large openings in the finished housing structure.
2Adaptability or versatility
If differently sized valve openings are provided in the accumulator housing, then both gas filling valve and liquid valve can be inserted, but the fiber layer composite requires different winding designs for each opening
Solution Approach 1:
The housing is segmented into a central part and separate caps. Each cap can be designed with its own optimized opening size and shape for specific valve types. This allows different valve configurations without complicating the main housing's fiber winding design, as each cap is a separate component with its own winding pattern.
3Ease of manufacture
If standard GRP pipes are used for the central part, then production costs are reduced, but high strength values in the axial direction are difficult to achieve
Solution Approach 1:
The housing uses composite construction with GRP (glass fiber reinforced plastic) for the central part and cap parts. The fiber layers are wound at specific angles and embedded in resin matrices to achieve high axial strength. This composite material approach allows cost-effective production while meeting strength requirements through optimized fiber reinforcement patterns.
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 approach enables the production of bladder accumulators with high strength values and reduced production costs by integrating the bladder into the plastic core container during shaping, allowing for smaller valve openings and more efficient fiber winding, thereby minimizing delamination risks and material usage.
Implementation Method 1
The plastic core container (20) is obtained by means of a blow molding process
Implementation Method 2
shaping the plastic tube with an integrated bladder in a mold corresponding to a predeterminable plastic core container
Implementation Method 3
winding the outside of the plastic core container with at least one plastic fiber to create the storage housing
Data Source
Figure 1
AI summary
The invention relates to a method for the production of a bladder accumulator (10) which separates two media chambers (16, 18) from one another in a storage housing (12) by means of a bladder body (14), comprising at least the following production steps: - extruding a plastic tube over the bladder body (14); - shaping the plastic tube with the integrated bladder body (14) in a molding tool that corresponds to a predeterminable plastic core container (20), and - winding at least one plastic fiber from the outside on the plastic core container (20) for the purpose of creating the storage housing (12).