Finite Element Analysis provides information to predict how a seal product will function under certain situations and may help establish areas where the design may be improved with out having to test multiple prototypes.
Here we clarify how our engineers use FEA to design optimum sealing options for our buyer purposes.
Why do we use Finite Element Analysis (FEA)?
Our engineers encounter many important sealing applications with complicating influences. Envelope measurement, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all application parameters that we must contemplate when designing a seal.
In isolation, the impression of those application parameters is reasonably easy to predict when designing a sealing answer. However, if you compound a number of these elements (whilst usually pushing a few of them to their higher limit when sealing) it is essential to predict what goes to happen in actual application situations. Using FEA as a software, our engineers can confidently design after which manufacture robust, reliable, and cost-effective engineered sealing options for our clients.
Finite Element Analysis (FEA) allows us to know and quantify the results of real-world circumstances on a seal half or assembly. It can be used to identify potential causes the place sub-optimal sealing performance has been noticed and can be used to guide the design of surrounding elements; especially for merchandise similar to diaphragms and boots where contact with adjoining components might have to be prevented.
The software program additionally allows force knowledge to be extracted so that compressive forces for static seals, and friction forces for dynamic seals could be precisely predicted to help clients within the last design of their products.
How can we use FEA?
Starting with a 2D or 3D model of the preliminary design concept, we apply the boundary circumstances and constraints supplied by a customer; these can embrace pressure, drive, temperatures, and any utilized displacements. A appropriate finite component mesh is overlaid onto the seal design. This ensures that the areas of most interest return correct results. We can use bigger mesh sizes in areas with less relevance (or decrease ranges of displacement) to minimise the computing time required to unravel the model.
Material properties are then assigned to the seal and hardware elements. Most sealing materials are non-linear; the amount they deflect beneath an increase in pressure varies relying on how large that force is. This is in distinction to the straight-line relationship for many metals and rigid plastics. This complicates the fabric model and extends the processing time, however we use in-house tensile take a look at services to accurately produce the stress-strain materials fashions for our compounds to ensure the analysis is as representative of real-world efficiency as attainable.
What happens with the FEA data?
The analysis itself can take minutes or hours, depending on the complexity of the part and the range of operating situations being modelled. Behind the scenes within the software program, many lots of of hundreds of differential equations are being solved.
The results are analysed by our skilled seal designers to establish areas where the design may be optimised to match the precise requirements of the applying. Examples of these necessities might include sealing at very low temperatures, a have to minimise friction ranges with a dynamic seal or the seal may need to withstand excessive pressures with out extruding; no matter sealing system properties are most essential to the shopper and the applying.
Results for the finalised proposal could be offered to the client as force/temperature/stress/time dashboards, numerical information and animations showing how a seal performs all through the analysis. เกจวัดแรงดันไนโตรเจนราคา can be used as validation information within the customer’s system design course of.
An example of FEA
Faced with very tight packaging constraints, this customer requested a diaphragm component for a valve utility. By using FEA, we have been able to optimise the design; not only of the elastomer diaphragm itself, but also to suggest modifications to the hardware parts that interfaced with it to increase the obtainable area for the diaphragm. This stored materials stress levels low to remove any risk of fatigue failure of the diaphragm over the life of the valve.
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