1. Ready to work
Close the import and export valves, and ensure that the valve can not be opened without permission.
In the pump packing or cover, should make the first pump cooling high temperature to room temperature.
Make motor insulation, prevent motor start.
For motor drive, to release the residual charge (remove the fuse), for the high voltage connection to be handled by the electrician.
2. The discharge of residual liquid in the pipeline
For toxic, explosive, thermal or other dangerous medium, to prevent the operator and the environment, and pay attention to the relevant provisions of the law.
If the delivery of corrosive, toxic or dangerous medium, should first flush the pump outside, if the working medium is radioactive, but also the use of detergent to remove harmful substances.
Pump machine sent to the manufacturer for repair, should be done before the transport of cleaning decontamination work, and the development of a safety certificate. In spite of the development of a safety certificate, the relevant operating personnel must also pay attention to safety, because the full washing and cleaning work will remain harmful substances, should be taken to guard against leakage.
Remove the coupling cover and separate the parts of the coupling.
Remove all parts and auxiliary line.
Lubricating oil in the body of the net bearing box. In accordance with the relevant laws and regulations to dispose of used oil. Do not put it into the sewer.
Remove the pump and transport it to the installation site.
In the installation site should pay attention to all the possible risks, for example, pay attention to the installation of a solid, to prevent the installation of parts of the fall, and support good loose parts and so on.
3. Remove the coupling
Remove coupling from non motor end
The bearing and shaft center screw hole is damaged, and the appropriate drawing device and the circular disc for protecting the threaded hole shall be used.
4. Non drive end bearing removal
Unscrew the screws fixed fan cover, and remove it. Use circlip pliers from the shaft groove from the elastic snap ring, remove the fan and the key.
Unscrew the six corners of the bearing end cover and remove the bearing end cover.
Stop collar by pressing the pressing force in the round nut grooves of the bearing, the stop collar pull out from the groove of the round nut, unscrew the round nut, remove stop collar.
Unscrew the six angle screw on the compression ring of the bearing ring, and remove the entire bearing housing with wear-resistant bearings, and then remove the parts of the bearing.
5. Seal and hydraulic balance device disassembly
The gland nut, and the sealing gland removed and sealed stationary components. The shaft and the sealing rotating parts are removed from the shaft, and the six angle nut on the sealed box body is taken off, and the sealed box body is removed. Move the balance drum and balance drum cover, and pull out the fastening key, remove the balance drum and balance drum.
6. Pump body hydraulic parts removal
Because the parts are required to return to the original position when re assembled, they should be given to the middle of each stage, the guide vane and impeller are marked in the disassembly sequence. Unscrew the nut from the threaded bolt and remove the threaded bolt. Tapping with a plastic hammer, remove the exit end. Residual liquid will flow out.
Take the guide vane of the last stage out of the outlet. Remove the impeller from the main shaft and remove the key. The middle section of the middle section is taken together with the guide vanes. Residual liquid will flow out.
The next level in the middle of the demolition of the same. In the process of removing the shaft must be fully supported in order to prevent the shaft bending. The guide vane pressure at all levels of middle or forced to push out the guide vane.
7. Remove the bearing from the drive end
Unscrew the six angle nut on the end cover of the bearing end cover and remove the end cover of the bearing. The stop ring pull out from the round nut groove, unscrew the round nut, remove the locking ring. Unscrew the fastening six angle nut on the bearing support. Remove bearing support with wear-resistant bearings. Force the outer bearing wear with rotating parts extrusion. The baffle plate is removed, so that the inner ring of the wear-resistant bearing can be removed from the shaft.
8. Remove the seal from the drive end
Unscrew the nut on the sealing gland, and the sealing gland removed and sealed stationary components. The shaft and the seal of the rotating parts are removed from the shaft, loosen and remove the sealing box on the six corners of the nut, remove the seal box.
