Precautions and Preparation for Disassembling Seals in Construction Machinery

Precautions for disassembling engineering machinery seals:

Be careful when installing and disassembling mechanical seals, and it is strictly prohibited to use hammers and flat shovels to avoid damaging the sealing components. If scaling cannot be removed, it should be cleaned thoroughly before disassembly.

If mechanical seals are used at both ends of the pump, take care of each other during assembly and disassembly to prevent neglecting one aspect.

For the mechanical seal that has been operated, if the cover is loose and causes the seal to move, the dynamic and static ring parts must be replaced and should not be tightened again to continue use. Because the original operating trajectory of the friction pair will change after loosening, the sealing performance of the contact surface is easily damaged.

Preparation work before starting the sealing components of construction machinery:

Conduct a comprehensive inspection of the mechanical seal, as well as the installation of auxiliary devices and pipelines, to ensure that they are complete and meet the technical requirements.

Perform a static pressure test before starting the mechanical seal to check for any leakage. If there are many leaks, the cause should be investigated and efforts should be made to eliminate them. If it is still ineffective, it should be disassembled, inspected, and reinstalled. The general static pressure test pressure is 2-3 kilograms per square centimeter.

Rotate the pump towards the turning wheel and check if it is light and even. If the turning gear is difficult or stationary, the assembly dimensions should be checked for errors and the installation should be reasonable.

Installation and shutdown of engineering machinery seals:

Before starting, the sealed chamber should be filled with liquid. When transporting solidified media, steam should be used to heat the sealed chamber and melt the media. Before starting, it is necessary to turn the car to prevent sudden starting from causing the soft ring to break.

For mechanical seals that utilize the pump's external sealing oil system, the sealing oil system should be started first. Stop the oil sealing system after parking.

After the hot oil pump is shut down, the cooling water for the sealing chamber and end face seal cannot be stopped immediately. The cooling water should be stopped only when the oil temperature at the end face seal drops below 80 degrees to avoid damaging the sealing parts.