The sealing principle and advantages of combined "V-shaped" hydraulic seals

V-type hydraulic seal is a lip seal ring, and it is also one of the most used molding fillers in the early days. It is mainly used for the repeated movement of the hydraulic system, as a seal for the piston or piston rod, and is rarely used for rotary or static seals. So, what is the sealing principle of hydraulic V-type seals?

In the free state, the hydraulic combination seal lips have a "self-sealing" effect, when the hydraulic action, the pressure makes the lips change the contact state, increase the contact stress, make the lips contact more closely with the hole or rod, the medium is more difficult to pass, even through the first V-ring lip, the pressure is greatly reduced, through the second V-ring lip, the pressure is reduced again, so continue, the internal pressure will disappear, But the leak is stopped, producing a good sealing effect.

* What are the advantages of the combined V-type hydraulic seal model?

(1) Good sealing performance of the seal;

(2) can allow a certain eccentric load and eccentric movement;

(3) It can be used with multiple rings overlapping, and obtain a larger sealing effect by adjusting the clamping force;

(4) combined hydraulic seals can withstand impact pressure and vibration pressure;

(5) When the packing can not be installed from the radial, you can open the incision, as long as the incision is staggered during the installation process, it will not affect the sealing effect. The disadvantage is that the friction resistance is greater than other forming fillers.

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