How to accurately calculate the number of friction values of seals (oil seals)
Release time:
2023-11-26
How can we accurately calculate the friction coefficient of surface sealing products such as seal oil seal seal ring? We believe that the force between a moving seal and the sealing surface is related to many factors, such as the structure factor of the seal, the sealing material factor, fluid and fluid pressure, humidity, friction speed and cleanliness.
How can we accurately calculate the friction coefficient of surface sealing products such as seal oil seal seal ring? We believe that the force between a moving seal and the sealing surface is related to many factors, such as the structure factor of the seal, the sealing material factor, fluid and fluid pressure, humidity, friction speed and cleanliness.
The resulting load may not have a great impact in many applications and working environments, but it is harmful in terms of its ability to generate heat. This heat energy causes damage to the sealing material and lubricating film or increases leakage due to reduced fluid precision. Sometimes it will also cause these two consequences at the same time. The damage to the sealing material and lubricating film is more noteworthy, because it may produce some abrasive products, thereby further promoting friction and wear.
It is generally difficult to analyze the working performance of the seal from various aspects, because it involves many empirical factors for the seal structure. However, the friction is obviously proportional to the function of the initial contact pressure. However, the actual friction coefficient, in addition to changing with the seal material and surface cleanliness, also changes with the speed and time of the seal and the bonding surface.
If there is no overlap, the friction of the seal is proportional to the contact pressure, I .e.
Seal Friction = μPa × a × B
Note: In the formula, μ represents the friction coefficient,
Pa = effective contact pressure,
A = Seal and contact width in in the body in the body
B = sealing surface contact
The coefficient of friction should characterize the nature of the seal material involved in frictional contact and the presence of lubrication, however, the coefficient of friction also varies with the rate of friction. Therefore, a more complete formula is:
Sealing Friction = μ V ≤ Pa × a ≤ B
In the formula, V represents the friction speed,
The application of this formula is strictly limited, especially when the assembly pressure or interference pressure is not known, and thus the cross pressure "Pa" cannot be basically determined. The following semi-empirical formula may be more useful, but this formula does not take into account such factors as friction speed and surface finish.
Seal friction = KμPa×D
Note: In the formula, K represents the experience factor specific to the seal structure installed and operated according to the design conditions, and D is the diameter of the seal.
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