Tuckabag
Petroleum
- May 10, 2010
- 125
Hi All,
Just wondering if anyone can point me in the direction of some data or calculations for o-ring stiction?
I've used the Parker O-Ring book to calculate the running friction, however the only data they give re stiction is that the maximum break away friction that will develop in a system is 3x the running friction (based on 70 duro rubber and 8 micro-inch surface - which is what our assembly uses)
We have found in our testing that we never really get anywhere near this level of stiction.
The ratio of diameters required to overcome the 3x stiction indicates to use a much larger ratio of diameters then what we have found is actually necessary.
So, I'm hoping to try and find some other data to backup our testing so we can put some design guides into place should we change diameters of seals in our assembly.
Thanks.
Just wondering if anyone can point me in the direction of some data or calculations for o-ring stiction?
I've used the Parker O-Ring book to calculate the running friction, however the only data they give re stiction is that the maximum break away friction that will develop in a system is 3x the running friction (based on 70 duro rubber and 8 micro-inch surface - which is what our assembly uses)
We have found in our testing that we never really get anywhere near this level of stiction.
The ratio of diameters required to overcome the 3x stiction indicates to use a much larger ratio of diameters then what we have found is actually necessary.
So, I'm hoping to try and find some other data to backup our testing so we can put some design guides into place should we change diameters of seals in our assembly.
Thanks.
