Finite Element Analysis offers knowledge to foretell how a seal product will operate underneath certain circumstances and might help establish areas where the design may 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 functions.
Why can we use Finite Element Analysis (FEA)?
Our engineers encounter many critical sealing functions with complicating influences. Envelope measurement, housing limitations, shaft speeds, pressure/temperature ratings and chemical media are all utility parameters that we must think about when designing a seal.
In isolation, the impression of those utility parameters is fairly straightforward to predict when designing a sealing solution. However, if เกจวัดแก๊สหุงต้ม compound a variety of these factors (whilst typically pushing some of them to their upper restrict when sealing) it is essential to foretell what’s going to happen in actual software circumstances. Using FEA 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 understand and quantify the consequences of real-world circumstances on a seal part or meeting. It can be used to determine potential causes the place sub-optimal sealing efficiency has been observed and may additionally be used to information the design of surrounding parts; especially for products corresponding to diaphragms and boots where contact with adjoining parts could have to be prevented.
The software program also allows force knowledge to be extracted in order that compressive forces for static seals, and friction forces for dynamic seals can be accurately predicted to help clients in the last design of their merchandise.
How will 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 customer; these can embody strain, drive, temperatures, and any applied displacements. A suitable finite component mesh is overlaid onto the seal design. This ensures that the areas of most interest return correct results. We can use larger mesh sizes in areas with less relevance (or decrease ranges of displacement) to minimise the computing time required to unravel the mannequin.
Material properties are then assigned to the seal and hardware elements. Most sealing materials are non-linear; the amount they deflect underneath a rise in force varies depending on how massive that drive is. This is not like the straight-line relationship for most metals and rigid plastics. This complicates the fabric mannequin and extends the processing time, however we use in-house tensile take a look at services to precisely produce the stress-strain material models for our compounds to make sure the evaluation is as representative of real-world performance 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 vary of working conditions being modelled. Behind the scenes in the software program, many tons of of hundreds of differential equations are being solved.
The outcomes are analysed by our experienced seal designers to establish areas where the design may be optimised to match the specific necessities of the application. Examples of these necessities may include sealing at very low temperatures, a must minimise friction levels with a dynamic seal or the seal may need to withstand high pressures without extruding; whatever sealing system properties are most essential to the client and the applying.
Results for the finalised proposal may be introduced to the customer as force/temperature/stress/time dashboards, numerical information and animations exhibiting how a seal performs all through the evaluation. This data can be used as validation information in the customer’s system design process.
An instance of FEA
Faced with very tight packaging constraints, this buyer requested a diaphragm component for a valve utility. By using FEA, we were in a place to optimise the design; not only of the elastomer diaphragm itself, but additionally to propose modifications to the hardware elements that interfaced with it to extend the out there area for the diaphragm. This stored materials stress levels low to take away any possibility of fatigue failure of the diaphragm over the lifetime of the valve.