1、 Standard installation of reducer bearings (new bearing installation standard): 1. The new bearing should be checked for model, surface inspection, and radial clearance measurement should meet the requirements. After cleaning with kerosene, it should be heated to 80-100 ℃ with mechanical oil and maintained at this temperature for 30 minutes. 2. Install the bearing (model should face outward) by tapping the inner ring with a copper rod, tightly against the shaft shoulder, without any gap, and without loosening. After the bearings have cooled down, they should rotate flexibly by hand, and the cage should work normally and rotate smoothly without any impact sound. Pay close attention to the assembly sequence of each component during assembly to avoid errors or forgetting. 3. The maximum temperature limit for rotary bearings is 80 ℃ for rolling bearings and 65 ℃ for sliding bearings. The rolling bearings of the motor are at 100 ℃. The sliding bearing is at 80 ℃. 2、 Maintenance steps for gearbox and bearings: (1) Prepare the necessary lifting tools, dismantle the relevant oil and water pipelines, and seal them in a timely manner. (2) Remove the screws on the joint surface and end cover of the reducer, take out the stabilizing pin, clean it, and place it properly. (3) Measure the pre repair clearance of each component and record it. (4) Lift off the upper cover, remove the gear, and place it at the designated location. (5) Clean and inspect bearings and gears with kerosene, measure bearing clearance, and check the wear of gears and bearing retainers. (6) Drain the oil from the box and clean it. (7) When replacing bearings, use a specialized scraper. If it is difficult to remove, pour 120 ℃ hot oil on the inner ring of the bearing for heating. Acetylene flame heating is strictly prohibited. (8) Measure the dimensions of the journal and the inner ring of the new bearing, measure the clearance and record it. (9) Heat the bearing with engine oil and install it on the journal, while also installing the elastic retaining ring. (10) Retest the bearing clearance and record it. (11) Conduct a water pressure test on the cooling water inside the reducer and check for wear. (12) Lift the gears in place, rotate the large gears to ensure proper meshing and center alignment. (13) Lift the upper cover of the gearbox, measure the clearance at the top of the bearing, measure the axial clearance of each part, and adjust it appropriately. (14) Apply sealant to the joint surface, insert locating pins, and tighten the flange screws on the joint surface. (15) Assemble the end cover and adjust the cushion. (16) Connect the oil and water pipelines and valves. (17) Align the gearbox.
