01
2022
-
08
Improper design and use of wear-resistant O-rings
Author:
Improper design and use of wear-resistant O-ring will accelerate its damage and loss of sealing performance. The experimental results show that as long as the sealing device is properly designed and simply increases the pressure, it will not be damaged. Under high pressure and high temperature conditions, the main reason for the failure of the circular rubber sealing ring is the permanent deformation of the circular rubber sealing ring material and the circular rubber sealing ring is squeezed into the sealing gap and the bite. Next, let's look at the design and use of wear-resistant O-ring improper problems.
1, wear-resistant O-ring permanent deformation.
Because the synthetic rubber material used in the circular rubber sealing ring is viscoelastic material, the initial setting pressure and rebound blocking ability will be permanently deformed and gradually lost after long-term use, leakage, permanent deformation and elastic disappearance is the main reason for the loss of the circular rubber sealing performance.
2, wear-resistant O-ring bending damage.
There are many reasons to cause bending damage, one of the main is due to the working piston, piston rod and cylinder clearance is not the same, too large eccentricity, the diameter of the circular rubber sealing ring cross-section is not the same, due to the enterprise caused by the circular rubber sealing ring in a week more than the same friction, the friction coefficient of some parts of the circular rubber sealing ring is too large, bending. Usually, the circular rubber sealing ring with relatively small section size is easy to produce different friction. Cause serious bending, movement with circular rubber sealing ring than fixed with circular rubber sealing ring section diameter is our no reason. In addition, due to the coaxiality deviation of the closed groove, the height of the sealing technology is not equal and the cross-section diameter of the circular rubber sealing ring is not the same phenomenon, it may be able to make a part of the data compression cost of the circular rubber sealing ring is too large, on the other hand, part or too small or not subject to time compression. When the groove has eccentricity, that is, the coaxial deviation is greater than the compression of the circular rubber seal ring, the seal will completely control failure. Another harm caused by the large coaxiality deviation of the closed groove is the uneven compression of the O-ring along the circumference. In addition, due to the circular rubber sealing ring cross-section diameter, material hardness, lubricating oil film thickness and other uneven problems and the influence of the sealing shaft surface roughness and other factors, leading to a part of the circular rubber sealing ring along the workpiece surface sliding, the other part is mainly rolling, so as to avoid the bending caused by. Movement makes the ring vulnerable to damage from bending, which is an important historical reason for some damage and leakage that has occurred in closed handling devices. Therefore, it is necessary to improve the machining method precision analysis of mechanical closed groove and constantly reduce the eccentricity is an important environmental factor to ensure that the circular rubber seal ring has a safe and reliable sealing property and life. It should not be installed so that it is in a mental state of information bending.
3, wear-resistant O-ring abrasive wear phenomenon.
When the sealing clearance moves relative to each other, the dust and sand particles in the working environment are attached to the surface of the piston rod, and enter the cylinder together with the reciprocating motion of the piston rod and the oil film, becoming abrasive particles invading the surface, accelerating wear and losing the sealing. To avoid this, a dust ring must be used at the end of the reciprocating closed extension shaft.
wear-resistant O-ring
Contact us
Shanghai Lingsheng Seals Co., LTD
Telephone:021-54419691
Phone:13671848590
Fax:021-39650919
Address: No. 611 Yuetai Road, Songjiang District, Shanghai
Follow us
Contact us
Shanghai Lingsheng Seals Co., LTD
Telephone:021-54419691
Phone:13671848590
Fax:021-39650919
Address: No. 611 Yuetai Road,
Songjiang District, Shanghai
关注我们