Pressure Tank Variable Length Compensation Section
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Solution Overview
Problem
Existing pressure vessel arrangements with variable compensation sections face issues of wear and limited compensation strokes due to the use of sliding seals and bellows, which are prone to mechanical deformation and premature aging under overpressure.
Innovation Solution
The pressure vessel arrangement incorporates an enveloping jacket surrounding the sealing arrangement, balanced with differential pressure-balanced media on both sides, providing mechanical protection and dielectric shielding, and allowing for extended compensation strokes with reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sliding seals with sliding bearings are used in the compensation section, then fluid-tight connection between vessel elements is achieved, but wear occurs on the sealing elements and sliding surfaces during operation
Solution Approach 1:
A cleaning medium is introduced as an intermediary substance that flows between the sealing elements and sliding surfaces. This medium actively removes dirt particles and contaminants from the contact areas, preventing wear and maintaining fluid-tight sealing over extended periods. The cleaning medium acts as a mediator that protects the sealing interface from direct contamination damage.
2Duration of action of moving object
If a small compensation stroke is implemented to counteract wear, then sealing element durability is improved, but the compensation capability of the pressure vessel arrangement is limited
Solution Approach 1:
The cleaning medium continuously flows through the compensation section during the entire operational life of the sealing elements. This continuous cleaning action maintains the sealing surfaces in good condition throughout the full compensation stroke range, enabling both large displacement and extended service life without the trade-off present in conventional designs.
3Length of moving object
If multiple pressure vessel assemblies are connected in series to achieve larger compensation strokes, then compensation capability is increased, but device complexity and cost increase
Solution Approach 1:
The compensation section is segmented into multiple independent sealing zones within a single pressure vessel assembly. Each zone has its own sealing elements and sliding surfaces, allowing the total compensation stroke to be distributed across several segments. This segmentation enables large total displacement while maintaining a compact, integrated structure rather than requiring multiple separate assemblies.
4Reliability
If sliding surfaces are continuously cleaned by sliding bearings, then sealing performance is maintained, but wear still occurs and cleaning effectiveness is limited
Solution Approach 1:
A fluid cleaning medium is introduced into the compensation section to hydraulically remove contaminants from sliding surfaces. This hydraulic cleaning mechanism uses the flow of liquid or gas to carry away dirt particles, providing more effective and continuous cleaning compared to mechanical bearing cleaning alone, thereby extending service life while maintaining sealing performance.
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 enhances the service life and reliability of the pressure vessel by protecting the sealing arrangement from external influences and contamination, enabling increased compensation strokes without excessive wear, and maintaining fluid-tightness during movement.
Implementation Method 1
The enveloping jacket is surrounded on its inner and outer sides by one or more differentially pressure-balanced medium(s)
Implementation Method 2
a sealing arrangement (31, 32), which is connected to a sliding seal (11, 12), which forms part of a pressure-resistant fluid barrier
Data Source
Figure 1
Figure 2
AI summary
A pressure vessel arrangement comprising a compensation section of variable length has a first and a second vessel element (1, 2). The two vessel elements (1, 2) are movable relative to one another and are connected to one another in fluid-tight fashion via a sealing arrangement. The sealing arrangement is surrounded by an enveloping casing (17).