Rotary kiln hydraulic gear wheel bearing removal installation experience

Rotary kiln hydraulic gear wheel bearing 2021 - remove the installation experience 03 - 07 Wu Xinfu ( Taurus, fujian cement co. , LTD. ) A, problem, introduce a company of 5000 t/d production line of rotary kiln adopts hydraulic gear wheel device ( Hereinafter referred to as the gear wheel parts) Control of the kiln running up and down, in 2014 when the normal production of hydraulic gear wheel device bearing failure, to save maintenance time, more shift gear wheel parts bearing at the scene. Structure due to the maintenance personnel are not familiar with gear wheel parts, in the new bearing assembly onto the wheel bearing block, the assembly method is inappropriate and cause bearing assembly does not reach the designated position, maintenance personnel to catch wheel housings for heating, and 500 t hydraulic jack to put in place, bearing group 7 d the catch wheel parts maintenance, but less than 4 months after the operation of catch wheel parts failure occurs again, and maintenance personnel to discuss and research catch wheel bearing removal and installation plan, with 3 d will catch wheel parts maintenance good, has two years running. Now will introduce the bearing dismantling plan and steps are as follows. 2, 1) catch wheel bearing structure and remove Catch wheel parts structure as shown in figure 1. Figure 1 gear wheel parts structure schematic 2) Catch wheel bearing group assembly structure for two spherical roller bearing with a thrust spherical roller bearing series in a block on the shaft. Check drawings, catch wheel and axle of greater than surplus cooperation ( K7/u6) , remove difficulties at the scene. , cut roller bearing outer ring and wheel bearing block with transition fit ( H7/h6) 。 3) Bearing removal as shown in figure 2. Figure 2 remove motioned to the horse remove bearing inversion method: place the catch wheel parts reverse on flat ground, pull down bearing end cover, according to the figure 2 find a good level, level error & lt; 2毫米; Site to produce a shafting tooling, remove the blocking shaft system. Decorate according to figure 2 100 t one thousand jins bumps out wheel bearing block, the block of wheel bearing and shaft system from process, equipped with a small crane drawing bearing seat up, jack, will cover wheel bearing and shaft line separation. Catch wheel bearing and axle system after separation, the conventional method to three bearing will be removed, check gear wheel bearing assembly position. Three, the installation of the bearings and wheel 1) Spherical roller bearings and wheel assembly as shown in figure 3. Figure 3 bearings and shaft assembly will block the wheel belt wheel on the ground, finding a good level, according to the figure 3 for circumferential direction of four level error & lt; 1毫米; Using oil heating method to suit to block two spherical roller bearings on the shaft, shown in figure 1 of thrust self-aligning roller bearing is temporarily not assembled. 2) Block shaft system and catch wheel bearing assembly as shown in figure 4. Specific installation process is as follows. Figure 4 gear shaft and bearing assembly production assembly platform. Assembly platform lower space is about 1 height from the ground. 3 m, assembly platform around the bottom have the space to facilitate assembly operation. To catch wheel bearing upper position as shown in figure 4 a short period of circular using electric polishing machine polishing, About 60 mm long, bearing the parts inside diameter increased 0. 10 to 0. 15mm) , other bearing outer ring assembly position with fine emery cloth smooth, handle, apply a thin layer of butter on bearing wall; And will catch wheel bearing level on the assembly platform, bearing level error & lt; 1mm。 At four o 'clock on the catch wheel adopts hanging method, as shown in figure 4 adjustment wheel, raised roller bearing outer ring, cut roller bearing outer ring for horizontal state, level error & lt; 1mm。 In crane good gear shaft is inserted inside the wheel bearing, in shown in figure 4 jack coordinate control gear shaft system within the wheel bearing block drop speed: jack every drop 3 ~ 5 mm, stop falling; Then the crane hook is followed by 3 ~ 5 mm. In the process of decline, cut heart bearing outer ring assembly personnel should carefully check whether appear skewed, if discover bearing outer ring skewed should correct in time. Repeat operation until block shaft system under the action of gravity stops falling. And improvised a pressed on the assembly platform support, in 100 t jack downward gear wheel, bearing group assembly in place. 3) Thrust spherical roller bearing assembly of shafting on two self-aligning roller bearing on bearing in place, after all will catch wheel parts according to the figure 2 are reversed, thrust spherical roller bearing inner ring is assembled to the shaft, then thrust self-aligning roller bearing outer ring installed on the bearing seat, bearing end cover along with the entire block end of the wheel bearing component disassembly, installation work. Four, conclusion gear wheel parts is the key to ensure the normal operation of rotary kiln parts, if catch wheel bearing maintenance or failure should be returned to the factory repair, round-trip freight requires 2 at a time. 20000 yuan, factory maintenance labor should be 3. 50000 yuan, the total maintenance cost to 5. 70000 yuan, Excluding purchase cost of bearing) And maintenance period plus the round-trip time on the way generally need 6 ~ 8 d; In field replacement bearings, usually need 2 ~ 3 d can be completed. Master the method, a shift gear wheel parts bearing to ensure the normal operation of cement production line, to reduce the equipment maintenance cost has positive meaning. Source: 'cement' 08, 2017