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Roller sleeve and grinding roller bearings are worn parts. Roller sleeve wear to a certain extent, can be used upside down; when the roller sleeve wear again, so that the mill output decreased greatly, when the mill is not sufficient to maintain normal production and should be shut down, replaced with a new roll sets.
The following steps should replace the ultrafine vertical roller mill sleeve or bearing
(1) Carefully read the relevant sub-part drawing roller device, transmission arm, hydraulic schematics, etc;
(2) Remove the roller door on the housing;
(3) Remove the operating cylinder pressure, so that the roller assembly by weight falls on the disc;
(4) Remove the coupling pin between the arm and the rocker arm;
(5) associated with the pin and rocker arm, the hydraulic system into maintenance state, start the pump motor, the steps in the overhaul of the cylinder lift roller mill roller pulls the machine, to be roller device into an upright position after high-pressure pipeline, corresponding to the cylinder immediately after hyperbaric Globe manual shut-off valve is closed, remove the fixing roller sleeve stud and pressure ring, you can remove the roller sleeve (if replacement bearings, roller assembly as a whole must be from rocker removed, transported to the machine repair shop maintenance), and then replaced with a new roller sleeve or roller sleeve upside down, the assembly should first clean the joint surface of each piece, after assembly is completed application feeler combination of surface binding situation. After changing the roller sleeve, you can press the overhaul cylinder will roll grinding mill fell into step inside the roller assembly into the grinding chamber.
Ground inspection scraper device and disc liner, gauge ring. Overhaul:
(1) steps in the overhaul of the roller sleeve or bearing roller assembly pulls mill outside;
(2) Open the lower access door to the housing inspection, replacement scraper plate scraper device;
(3) The first disc liner bolts on the pressure ring and pressure ring removed, remove the pressure ring, with a crowbar to pry the liner hanging out grinding chamber, and then replace the new liner. Should try to ensure the smooth installation of the liner between the liner and the liner, each corresponding to the pressure ring should be a piece of liner pressure prison, not loose, linings and pressure ring can not be staggered installation, the gap between the liner applications oiled asbestos packing firmly plugged, prohibit the use of metal filling.