2. Before assembling the rolling bearing, the appropriate cleaning agent and method should be selected according to the rust prevention mode of the rolling bearing.

3. Before assembly, the inner and outer diameter micrometers shall be used to check the inner diameter of the bearing sleeve and the diameter of the journal, and the fitting tolerance shall meet the requirements of the drawings.

4. The rolling bearing is installed in the opposite open bearing seat. There should be no clearance between the bearing cover and the joint surface of the bearing seat, but a certain clearance should be left at the tile on both sides of the bearing outer ring and the bearing seat.The side clearance of the tile can be measured and checked by the feeler. If the clearance is too small or the phenomenon of “clamping” occurs, the scraper can be used to scrape, so as to increase the clearance, and comply with the table “clearance of rolling bearing and split bearing seat”.

5. Rolling bearing assembly, there are driving method, pressing method and hot loading method.Driving method in hammering, should use copper rod or sleeve as a tool of transmission force, so that the force acting on the bearing is symmetrical.In the pressing method, instead of hammering, a press is used, and the casing is still used to transmit the force.When hot loading, direct heating with flame is strictly prohibited. Hot oil should be heated at 80~90℃, and the oil temperature should not exceed 100℃.When the bearing is heated, it shall not contact the heating tank seat. The bearing shall be hung in the middle of the oil layer to avoid local overheating causing annealing.

The heating time shall not be less than 15min, and the inner sleeve shall be expanded to the required value before assembly.In the process of hot loading, there should be no pause, and the bearing should be installed to the correct position at a quick time.If the ball cage in the bearing is oil-resistant plastic, it should be heated with water, but the water should be wiped dry in time after assembly.

6. When assembling rolling bearings, the following requirements shall be met:

(1) The cleaned bearing should be checked, the bearing should have no damage, rust, flexible rotation, no noise, check the bearing and journal and bearing seat with the type and size, meet the requirements can be assembled;

⑵ When assembling, the pressure on the bearing should be evenly distributed and perpendicular to the end face, and the force on one side should be forbidden.Select the force point according to the assembly relationship. If the bearing is assembled on the journal, the pressure should be added to the inner ring of the bearing.

The assembly, should make the bearing and shaft shoulder close, tapered roller bearing and centripetal thrust bearing and shaft shoulder clearance shall not be greater than 0.05mm, other bearings shall not be greater than 0.1mm.The bearing cover and retaining ring must be smooth and evenly attached to the bearing end face, and the clearance should be adjusted according to the provisions of the technical documents;

(4) When assembling, the bearing should be noted on the specification of one end outward, easy to check and replace.After assembly, check whether there is stickiness by hand rotation, and then add appropriate amount of grease.The sealing device must be assembled in accordance with the provisions, and there shall be no oil leakage after sealing;

⑸ single row, double row and four row tapered roller bearings, centripetal thrust bearings, in the assembly should check the axial clearance, and according to bearing standards or technical documents to adjust;

Such a variety of centripetal bearings, needle roller bearings, spiral roller bearings assembly, must turn flexibly.After the bearing is assembled with grease, 65%~80% of the cavity volume of clean grease is injected into the bearing cavity. For the bearing lubricated with thin oil, grease is not allowed to be injected.

The axial clearance and axial pretightening degree (axial preinterference amount) which should be adjusted when the bearing is installed shall comply with the bearing standard or the equipment technical document.