Bellows Fluid Seal Contoured Surface for Dispensing Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fluid dispensers face component failure due to harsh operating conditions, such as high temperatures and pressures, leading to seal failure and unintended fluid flow, which can cause damage, especially when the fluid is an adhesive.
Innovation Solution
A bellow seal with a contoured external surface, including a cylindrical, undulating, and tapered portion, and a flexible region, is designed to enhance durability and prevent fluid leakage by distributing the load and maintaining a secure seal within the fluid dispensing system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional seal is used in the fluid dispenser system, then the system can operate initially, but the seal fails after a number of cycles due to harsh operating conditions
Solution Approach 1:
The seal is designed with a flexible membrane that can dynamically expand and contract in response to pressure changes during dispensing cycles. This dynamic behavior allows the seal to accommodate pressure fluctuations and maintain sealing effectiveness throughout operational cycles, preventing the failure that occurs with rigid traditional seals.
Solution Approach 2:
The seal's flexible membrane changes its physical state and dimensions in response to operating conditions. The membrane expands under pressure to maintain contact with sealing surfaces and contracts when pressure is released, adapting to the harsh operating conditions of high temperature and pressure cycles without failing.
2Productivity
If the seal is subjected to high pressure and temperature cycles, then fluid dispensing function is maintained, but the seal fails after a number of cycles
Solution Approach 1:
The seal employs a flexible membrane instead of a rigid traditional seal structure. This flexible shell can withstand high pressure and temperature cycles by elastically deforming to accommodate pressure changes, thereby maintaining fluid dispensing capability while significantly extending seal longevity compared to traditional rigid seals.
Solution Approach 2:
The flexible membrane design inherently cushions against the harsh operating conditions of high pressure and temperature cycles. The material and structure are selected to absorb and distribute the stress from these conditions before they can cause failure, allowing the seal to maintain reliability over many more operational cycles.
3Ease of manufacture
If a rigid seal structure is used, then manufacturing is simpler, but the seal cannot accommodate pressure changes and fails
Solution Approach 1:
The flexible membrane seal, while requiring more sophisticated manufacturing than simple rigid seals, can be produced using extrusion or molding processes for elastomeric materials. The flexibility of the membrane is essential for accommodating pressure changes during operation, and the manufacturing complexity is justified by the significant improvement in reliability and seal performance under pressure cycles.
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 bellow seal effectively prolongs the operational cycles of the dispensing system by reducing the likelihood of seal failure, ensuring precise fluid dispensing and minimizing damage from adhesive leaks.
Implementation Method 1
a flexible region defined between a first point located on the cylindrical portion and a second point located on the concave portion
Data Source
AI summary
A bellow seal of a fluid dispensing system is disclosed. The bellow seal having a generally circular cross section includes a first end having a first diameter. The bellow seal further includes a second end having a second diameter that is smaller than the first diameter of the first end. The bellow seal further includes a contoured external surface extending between the first end and the second end. The external surface includes a cylindrical portion extending from the first end, an undulating portion, (which includes a convex portion extending from the cylindrical portion and a concave portion extending from the convex portion), and a tapered portion extending from the concave portion to the second end. The bellow seal further includes a flexible region defined between a first point located on the cylindrical portion and a second point located on the concave portion.