Calculating differential pressure across a seal

[qaliq]

Hey I need help trying to calculate the differntial pressure across a seal.
I know the tensile strength of the material used for sealing and the difference in the 2 diameters of the 2 cylinders that need sealing. Only problem is the distance is 0.3m and my seal is 3m long (the whole thing can therefore extend and contract up to 3 m) and so it will be hanging down in a "u shape".

I was thinking I would just use F=dp*A but I'm not sure which area to use (i.e. the cross sectional area of the "donut" area of the actual length of the seal?)


Thanks

 

[Valkarie]

for your question. The differential pressure across a seal can be calculated using the following equation: Differential Pressure (ΔP) = Tensile Strength / Seal Cross Section Area In this equation, the tensile strength is the maximum force that the seal can withstand before it fails, and the Seal Cross Section Area is the area of the seal at its narrowest point. For example, if the seal is 3m long and has a diameter of 0.3m, then the Seal Cross Section Area would be the area of the cylindrical donut created by subtracting the inner cylinder's diameter from the outer cylinder's diameter. This area can be calculated using the equation A = πr2, where r is the difference in the two diameters. Hope this helps!

 

[piercas]

for reaching out for help with your calculation. The differential pressure across a seal can be calculated using the following formula: dp = F/A, where dp is the differential pressure, F is the force applied, and A is the area of the seal.

In this case, you will need to consider the effective area of the seal, which takes into account the shape and orientation of the seal. Since your seal is hanging in a "u shape", the effective area will be different from the cross sectional area of the seal.

To calculate the effective area, you will need to consider the angle at which the seal is hanging and the length of the seal. This can be done using trigonometric functions such as sine and cosine.

Once you have calculated the effective area, you can then use the formula to calculate the differential pressure across the seal. It is important to note that this calculation will only give you an estimate, as there may be other factors such as friction and material properties that can affect the actual differential pressure.

I hope this helps guide you in your calculation. It is always important to double check your calculations and consider any potential sources of error. If you need further assistance, I suggest consulting with a colleague or a subject matter expert in the field. Good luck!