Zhongtian steel thermal power plant waste heat in the southern district of circulation fan bearing replacement

Zenith steel thermal power plant waste heat for the southern district 2019 - cycle fan bearing replacement 09 - 27 Luo Ronggang on February 25, 2019, waste heat circulation fan for the southern district no. 1 furnace ( 日元, 2 * 48 - 14NO. 25. 5 f jiangsu jintong ling fluid machinery technology co. , LTD. ) Coupling lateral bearing box strip inspection, will now described as follows: the process of inspection & diams; Prepare 1, contact steam crane, determine the maintenance time, pay attention to the hoisting command shall be the responsibility of the personnel; 2, working ticket issued, completes the safety measures, electric motor, demolition related thermal meter in advance; 3, prepare related tools, such as hydraulic rama, chain blocks, GeHan tools, etc. ; 4, ready to spare parts. ♦ Construction 1, open the oil drain bearing box, put lubricating oil in the bearing box; 2, demolition of bellows seal baffle; 3, dismantle coupling bolt, take out coupling diaphragm, pay attention to do relevant tags; 4, dismantle bearing box inside end cover bolts and gland bolts on the bearing box; 5, dismantling motor anchor bolt; 6, the use of steam crane, hoist motor above the canopy; And electric hoist, rotating right Angle, in order to pull the fan shaft coupling; 7, the use of hydraulic rama, remove the fan side even the axis; 8, remove the coupling gland and side boards, check the bearing wear, through inspection found that the inside of oil baffle block fracture damage, bearing wear; 9, loosen the bearing and the nut, and jack in the inside diameter of axle place, jacking fan axis, bearings, 22238). ； 10, clean up the repair related parts and components, special attention to clean up the bearing box; 11, bearing of back pack: bearing and shaft neck using hot assembly is not allowed to use direct flame heating bearings. Bearing should be suspended and submerged in oil heating, heating temperature control in 100 ℃ ~ 120 ℃ in general. And maintain a 10 min, and then remove the bearing, suits in the journal, make its natural cooling in air; 12, snapping the bearing cover; Measurement on top of the bearing cover and coat of the bearing clearance, generally USES the method of measurement of lead wire, for bearing is lubricated by lubricating oil, coupling the side bearing gap is 0. 00毫米~ 0。 6 mm, impeller side clearance is 0. 05mm~0. 15mm； 13, installed side panel and tighten bolts is good; 14, installed fan shaft sealing plate; 15, thermal coupling; 16, the use of steam hanging, return to motor, canopy reset; 17, coupling correction, coupling to the wheel, for elastic coupling gap is 4 mm to 10 mm; Coupling of axial and radial error is not greater than zero. 10毫米; 18, bearing box refueling and adjusted manually set a circle; 19 the anchor bolts, motor, and restore thermal meter, cooling water pipe; 20, clean up the scene, and the comprehensive examination, bolts, system recovery whether there are omissions; 21, try to turn the fan and record the vibration, temperature, current and other data.