How does the dimension tolerance of oil cylinder groove fit with the seal? When the oil cylinder starts to work, the working state of the seal is: the inner and outer lips are close to the inner and outer walls and move backward. The root of the seal is pressed backward. With the increase of the pressure, the force of the hydraulic oil on the seal is also increased, and the overall deformation of the seal is also increased. When the working cycle is completed and there is no pressure in the oil cylinder, the seal will return to its original state. Repeated deformation and recovery, until the effective amount of both lips of the seal is lost, the seal is damaged.

How does the dimension tolerance of oil cylinder groove fit with the seal?

(1) There are many forms of reciprocating seals, such as L-type, U-type, V-type, and Y-type. Most of them are lip seals.

(2) Reciprocating lip seals are widely used in reciprocating cylinders of hydraulic systems. The pressure surface of the seal is lip shaped, and there is a small interference during installation, so that the lip and the sealing surface are fully contacted to produce a sealing effect. When the oil cylinder works, its contact force and contact area increase with the increase of pressure, and the sealing performance increases with the increase of pressure. When the oil cylinder returns, the pressure decreases, the contact area and contact force decrease, and the sealing performance decreases. This lip operation process is similar to the human breathing process. In addition, this process also serves as a lubrication lip.