Roller press shaft wear analysis and on-line repairing

Roller press shaft wear analysis and repair 2019 - online 07 - 03 1 failure condition in my company a total of four sets of cement mill, ball mill adopts roller press + combined grinding process, including no. 1 and no. 2 line for HFCGl40 - rolling machine specifications The type 65, no. 3 and line 4 roller press for HFCGl40 - The type 80. After technical renovation, will be two HFCGl40 - For HFCGl40-65 type transform The type 80. Line 1 of roller press in 2010, during the late October to late November, moving roller not driving end bearing gland bolts fracture phenomenon, a total of four times seriously affect the normal operation of the mill. The structure of the roller roller press activities is shown in figure 1. This machine roller motor roller drive end bearing gland apart, inspection found that the diameter of axle serious wear and tear, to test the differences, find bearing inside diameter and axial radial clearance of 0. 65 - 0. 75mm。 Shafting bearings is a double row of centripetal spherical roller bearings, inner taper 1:12, diameter of axle after wear, along the direction of the taper sliding bearing, bearing gland increase tension, to achieve fatigue limit, break. 2 maintenance measures according to company's practice, shaft after wear such equipment is generally will down or together with the machine, to repair the unit maintenance outsourcing brush plating processing. But as a rolling machine, large volume weight is heavy, outside repairs, the cost is high, long downtime, affect the operation of equipment. So after serious research, adopted the f the blue polymer composite repair materials online repair. First of all to wear the axis of the bit to do fine measurement to determine the thickness of the fixing agent, daub to wear trunnion cleaning, polishing processing, and then do the four copper symmetrical arrangement used for positioning. Preparation work is completed, in accordance with the requirements for construction technology in the daub on the journal of the wear of metal repair agent, and then to assemble, after waiting for curing repair work over, to the boot operation, meanwhile share about 14 h. The whole repair process is in the blue merchants carried out under the direction of technical personnel. Line 1 roller press after repair boot operation, not a broken bolt, equipment running in good condition. In late March 2011, line 4 roller press, there is the drive end bearing gland bolts broken phenomenon, but also broken three times in a month, journal wear and tear, using the method of the journal. After repair boot operation condition is better also. 3 conclusion two roller machine has the same fault, this analysis thinks, their failure factors is different. Line 1 roller roller press activities is technical renovation and has been running for more than two years, and double roller have to surfacing once every six months, there have been abnormal running before welding, the shaft wear and tear, and installation of bearing gland 12 high-strength bolt screw spanner installation is not used, different bolt tightening degree, results in uneven force, therefore successively appeared fracture; Line 4 roller press shafting never apart, should not to tighten bolts degree of different problems, the cause of the bolt fracture was rolling machine has entered the heat-resisting steel block, with iron remover in process system, it for magnetic force of heat resistant steel co. , LTD. , which steel block into the roller press, the roll surface wear is serious, the abnormal cause the shaft neck to wear at runtime, worsening the bearing force, cause the gland bolts appear rupture. Covering, correct installation, operation and timely inspection maintenance is the basis of the guarantee normal operation of equipment.