Rotary kiln shaft thrust plate split processing

The processing of rotary shaft thrust tray of split 2021 - 03 - 01 ShenWenJun JinJun Ma Cheng chief ( Huaibei mining phase mountain cement co. , LTD. ) A, problem, a company & Phi; 4 m× Second 60 m rotary kiln belting leather and layout of the roller as shown in figure 1. On April 8, 2010, 19, wheel (no. 2 bridge bearing shell temperature within 1 h from 38 ℃ rose to 57 ℃. Check the system parts are normal. First adopted roller upper pouring cold oil, lower oil hole method of heating oil cooling, but no effect, then within 10 min, the temperature rise to 65 ℃ and the inside wheel seat appeared sound, so we have to stop kiln. Open the roller end cover and slow turning kiln body, observed shaft thrust tray of cracking phenomenon is shown in figure 2, the crack represents about 3/5 of that circle, every week, crack one time. Figure 1 rotary kiln second belting leather roller arrangement shaft thrust plate fracture motioned 2 Tito, bearing high temperature, and thrust plate cracking cause analysis for a long time, because the kiln hydraulic gear wheel cone and three block belting leather cone contact wear serious, combined with the hydraulic automatic control line fault block round trip, hydraulic cylinder instead of artificial on-site operation, each class adjustment on the kiln body next time, due to the time of the kiln is short ( About 30 min) , and the working cylinder and downs, making cylinder are often in a run, appear even belting leather edge phenomenon beyond the edge of the wheel. At this point, there is great difference at the ends of the roller bearing, the bottom is greater than the top. But when in the kiln body, if the belting leather and friction between the wheel is greater than the shaft neck and the bearing friction, will drive the wheel up, when the displacement exceeds the design size, thrust plate will touch bearing shell tile edge, friction, and makes lubricating oil temperature rising rapidly. When the thrust is too large, more than the ultimate strength of thrust shaft shoulders, then there will be a split phenomenon. Analysis and the turning of the cylinder by above knowable, four roller bearing in the second block belting leather seat, especially in the no. 2 bearing as the most important. So the fault phenomenon in no. 2 on the performance. Third, measures, 1) Make baffle plate reinforcement thrust plate use Q235 steel plate, making a baffle plate as shown in figure 3. On the outside of the thrust face to & Phi; 280 mm diameter circle, uniform out four & Phi; 33 mm hole, and then wring out (of the thread. The baffle plate with (bolt fixed on the thrust this end. Because of the added a baffle plate thickness, the original end cover can not use, with 3 mm for this iron made a drum belly end cover. Figure 3 thrust plate baffle plate ( 2) Wash bowl, change new oil, restore the hydraulic cylinder travel alarm and control circuit. Because the kiln after cooling, cylinder contraction, belting leather on roller up automatically, when belting leather in the middle of the roller, readjust the switch displacement, make up for hydraulic gear wheel and three block belting leather cone contact wear and the amount of dislocation, make belting leather in the middle of roller & plusmn; 10 mm within the scope of mobile operation. ( 3) Each class to add a number of kiln, interval of about 3 h. Timing to belting leather and plate spray high-temperature grease, as to reduce the friction of belting leather upward. Through the above processing, the rotary kiln is running normally. Source: 'cement'