Nested Kammprofile Gasket for High-Pressure Sealing
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Solution Overview
Problem
Gaskets face challenges in maintaining sealing effectiveness under varying environmental conditions, particularly when subjected to high temperatures and pressures, as they can suffer damage and leakage due to uneven flange surfaces and high load applications, leading to compromised sealing performance.
Innovation Solution
A gasket design featuring a kammprofile enclosed within metal jackets, with an O-ring member and serrated surfaces, and optionally a spring, to enhance sealing properties and durability, and the use of sealing layers on the jackets to prevent damage and maintain tight contact with flanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spiral wound gasket is used with high load to maintain sealing under pressure, then the sealing force is improved, but the hoops or fillers can be separated through gaps between flanges causing damage and leakage
Solution Approach 1:
The patent implements a nested structure where an inner jacket containing the kammprofile is enclosed within an outer jacket. This multi-layer nesting provides progressive protection: the inner jacket protects the vulnerable kammprofile cores from separation through flange gaps, while the outer jacket provides additional structural support and sealing. The nested configuration allows the gasket to maintain sealing integrity under high load without the hoops or fillers being separated through gaps.
Solution Approach 2:
The gasket combines multiple materials with different properties: the kammprofile (typically metal or composite) provides compression and sealing force, the inner and outer jackets (metal or reinforced material) provide structural integrity and protection, and sealing materials (such as graphite, PTFE, or ceramic coatings) are applied to the jacket surfaces. This composite structure leverages the strengths of each material to achieve both high sealing force and resistance to separation damage.
2Reliability
If the gasket is compressed with high pressure to seal gaps between flanges, then the sealing effect is improved, but the gasket structure can be damaged under repeated heating and cooling cycles
Solution Approach 1:
The patent applies cushioning measures in advance by providing the nested jacket structure and protective coatings before the gasket is installed and subjected to operational stresses. The inner and outer jackets are pre-configured to absorb and distribute mechanical stresses from high pressure and thermal cycling, preventing damage to the kammprofile and maintaining structural integrity throughout the service life.
Solution Approach 2:
The gasket design accommodates parameter changes during operation by using materials and structures that can adapt to thermal expansion and contraction. The kammprofile cores can deform elastically under compression, while the jackets are designed with appropriate flexibility and strength to withstand repeated heating and cooling cycles without fatigue failure, thereby extending service life while maintaining sealing effectiveness.
3Manufacturing precision
If the flanges are kept flat to ensure even sealing, then the sealing uniformity is improved, but maintaining flatness becomes difficult under repeated heating and cooling cycles
Solution Approach 1:
The gasket is designed to self-adjust to flange surface variations through the compression of the kammprofile cores between the inner and outer jackets. When flanges are compressed during bolting, the kammprofile automatically conforms to the actual flange surfaces, distributing compression force evenly across the sealing interface. This self-adjusting mechanism eliminates the need for perfect flange flatness while maintaining uniform sealing under thermal cycling conditions.
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
The design achieves improved sealing efficacy and durability by distributing pressure evenly, preventing damage from external forces and maintaining a strong seal under high temperature and pressure conditions, while extending the gasket's lifespan through enhanced restoring force and resistance to deformation.
Implementation Method 1
providing a spring inside the O-ring member
Implementation Method 2
maintaining a strong seal under high temperature and pressure conditions
Implementation Method 3
sealing layers provided in the first jacket and the second jacket
Data Source
AI summary
Provided is a gasket being interposed between the flanges which are the connecting portions of the pipes. The gasket includes: a first jacket; a kammprofile provided in the first jacket; an O-ring member provided at the inner side of the kammprofile; and a second jacket encasing a portion of the first jacket, the kammprofile, and the O-ring member. A method of manufacturing the gasket is provided.