Finite Element Analysis offers information to foretell how a seal product will operate underneath sure conditions and might help identify areas the place the design can be improved without having to check a number of prototypes.
Here we explain how our engineers use FEA to design optimum sealing solutions for our buyer purposes.
Why will we use Finite Element Analysis (FEA)?
Our engineers encounter many critical sealing functions with complicating influences. Envelope size, housing limitations, shaft speeds, pressure/temperature scores and chemical media are all application parameters that we must contemplate when designing a seal.
In isolation, the impact of those application parameters is reasonably easy to foretell when designing a sealing answer. However, whenever you compound a variety of these components (whilst often pushing some of them to their upper limit when sealing) it is crucial to foretell what is going to happen in actual application conditions. Using FEA as a tool, our engineers can confidently design after which manufacture strong, reliable, and cost-effective engineered sealing solutions for our clients.
Finite Element Analysis (FEA) permits us to know and quantify the effects of real-world situations on a seal half or meeting. It can be used to identify potential causes the place sub-optimal sealing efficiency has been noticed and may also be used to information the design of surrounding elements; especially for merchandise such as diaphragms and boots the place contact with adjacent elements could have to be averted.
The software also allows 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 in the last design of their merchandise.
How can we use FEA?
Starting with a 2D or 3D mannequin of the preliminary design idea, we apply the boundary circumstances and constraints equipped by a customer; these can include stress, pressure, temperatures, and any applied displacements. A suitable finite element mesh is overlaid onto the seal design. This ensures that the areas of most interest return accurate results. We can use bigger mesh sizes in areas with less relevance (or decrease levels of displacement) to minimise the computing time required to solve the mannequin.
Material properties are then assigned to the seal and hardware parts. Most sealing supplies are non-linear; the amount they deflect beneath an increase in pressure varies relying on how giant that force is. This is not like the straight-line relationship for most metals and inflexible plastics. This complicates the fabric mannequin and extends the processing time, but we use in-house tensile test facilities to precisely produce the stress-strain material models for our compounds to make sure the analysis is as consultant of real-world performance as possible.
What occurs with the FEA data?
The analysis itself can take minutes or hours, depending on the complexity of the half and the vary of operating situations being modelled. Behind the scenes within the software, many hundreds of thousands of differential equations are being solved.
pressure gauge น้ำมัน are analysed by our skilled seal designers to determine areas where the design can be optimised to match the particular requirements of the appliance. Examples of those requirements may include sealing at very low temperatures, a need to minimise friction ranges with a dynamic seal or the seal may have to resist excessive pressures without extruding; no matter sealing system properties are most important to the customer and the appliance.
Results for the finalised proposal may be presented to the shopper as force/temperature/stress/time dashboards, numerical data and animations showing how a seal performs throughout the evaluation. This info can be used as validation information within the customer’s system design course of.
An instance of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm element for a valve application. By using FEA, we had been in a place to optimise the design; not solely of the elastomer diaphragm itself, but also to propose modifications to the hardware components that interfaced with it to extend the available house for the diaphragm. This kept materials stress ranges low to take away any risk of fatigue failure of the diaphragm over the life of the valve.