In hydraulic system, whether it is metal pipe joint or hose joint, it is easy to leak。 For the jacketed pipe joints, most of them are leaked because the pipe is subjected to large external force or impact force, which causes the jacket to loosen or the end of the pipe to deform。 At this time, it is necessary to check whether the jacket is out of circle, whether the edge is defective, whether the end of the pipe is intact, and how tight the jacket nut is。 At the same time, it is necessary to eliminate the external pressure of the pipe。 For flared pipe joints, most of them are leaked due to excessive flaring, poor quality or multiple disassemblies, resulting in flaring deformation or cracks。 At this time, the front end can be truncated and reamed。 If the top pressure of the male and female cones is used for sealing, the leakage is mostly due to the damage of the two cones。 The cones can be ground with abrasive sand。
In some cases where the "" ring is sealed by the end face or outer diameter, the leakage causes are as follows: the aging or deformation of the "" ring causes leakage; the inadequate assembly of the "" ring causes leakage when the pressure is uneven or the "" ring is cut; the "" ring is not compacted and the elastic deformation is insufficient; and the "" ring groove is too deep to cause leakage. Leak. In order to reduce the depth of the groove, it is necessary to re-select the "" ring with the same outer diameter and thicker cross-section, or to cut or grind the sealing plane with the groove, so that the "" ring has enough elastic deformation (the compression should generally be between 0.35-0.65 mm).
For the leakage of pipe joints with oil-resistant plywood, wool felt, mild steel cardboard, combined sealing gasket or sealant, no matter what the material is, it is necessary to check whether the seals are damaged, deformed, aged and rough, and then take corresponding measures。