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Finite Element Analysis supplies knowledge to foretell how a seal product will perform under certain situations and might help identify areas where the design can be improved without having to test multiple prototypes.
Here we explain how our engineers use FEA to design optimum sealing options for our buyer applications.
Why do we use Finite Element Analysis (FEA)?
Our engineers encounter many important sealing functions with complicating influences. Envelope measurement, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all application parameters that we should contemplate when designing a seal.
In isolation, the impression of these software parameters is fairly simple to predict when designing a sealing solution. However, if you compound numerous these factors (whilst often pushing some of them to their upper limit when sealing) it is crucial to foretell what’s going to happen in actual software situations. Using เกจวัดแรงดันไฮดรอลิค as a device, our engineers can confidently design and then manufacture robust, dependable, and cost-effective engineered sealing options for our customers.
Finite Element Analysis (FEA) permits us to know and quantify the consequences of real-world conditions on a seal half or assembly. It can be used to identify potential causes where sub-optimal sealing performance has been observed and may also be used to information the design of surrounding parts; particularly for merchandise corresponding to diaphragms and boots the place contact with adjacent parts could have to be prevented.
The software program additionally permits force data to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals may be accurately predicted to assist clients within the final design of their products.
How can we use FEA?
Starting with a 2D or 3D model of the preliminary design idea, we apply the boundary conditions and constraints supplied by a buyer; these can include pressure, drive, temperatures, and any utilized displacements. A appropriate finite element mesh is overlaid onto the seal design. This ensures that the areas of most curiosity return accurate outcomes. We can use larger mesh sizes in areas with less relevance (or decrease ranges of displacement) to minimise the computing time required to solve the mannequin.
Material properties are then assigned to the seal and hardware elements. Most sealing materials are non-linear; the amount they deflect beneath a rise in drive varies depending on how large that pressure is. This is unlike the straight-line relationship for many metals and rigid plastics. This complicates the material mannequin and extends the processing time, however we use in-house tensile check services to accurately produce the stress-strain materials models for our compounds to make sure the evaluation is as representative of real-world efficiency as possible.
What occurs with the FEA data?
The evaluation itself can take minutes or hours, depending on the complexity of the half and the range of operating circumstances being modelled. Behind the scenes in the software program, many hundreds of 1000’s of differential equations are being solved.
The outcomes are analysed by our skilled seal designers to identify areas where the design may be optimised to match the particular necessities of the appliance. Examples of these necessities could embody sealing at very low temperatures, a need to minimise friction ranges with a dynamic seal or the seal might have to face up to high pressures with out extruding; no matter sealing system properties are most important to the shopper and the appliance.
Results for the finalised proposal could be offered to the shopper as force/temperature/stress/time dashboards, numerical information and animations displaying how a seal performs all through the analysis. This info can be used as validation information in 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 application. By using FEA, we were able to optimise the design; not solely of the elastomer diaphragm itself, but additionally to suggest modifications to the hardware elements that interfaced with it to extend the obtainable house for the diaphragm. This kept materials stress levels low to remove any risk of fatigue failure of the diaphragm over the lifetime of the valve.
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