For the measurement of the coaxiality of the main bearing hole of the machine body, the coaxiality of the diesel engine body must be measured accurately, and the amount of runout of the crankshaft is measured. The thickness of the bearing bush is selected to make the oil lubrication gap reach the same in each axial position. . Where the diesel engine has been crushed, flying, etc., the coaxiality of the main
IKO bearing hole must be tested before assembly. The total length of the ductile iron crankshaft is not more than 0.14mm, and the total length of the steel crankshaft is not more than 0.12mm. The roundness and cylindricity of the hole are also required. If it is beyond the limit, it is disabled. If it is within the limit, the grinding method is adopted (that is, the appropriate amount of red powder is applied to the bearing bush, and then the crankshaft is loaded and then rotated, and then the rod end joint bearing cap is removed to check the bearing bush. After the hard spot projecting portion is subjected to the scraping process, the amount of change in the dimension is measured, thereby ensuring the reliability of use.
1. Location: In order to check whether the installation is correct, check the operation. The small machine can be rotated by hand to confirm whether the rotation is smooth. The inspection items have poor operation due to foreign matter, scratches, and indentations. Due to poor installation, the torque generated by the mounting of the mount is unstable, and the torque is too large due to too small clearance, installation error, and sealing friction. Wait. If there is no abnormality, the power running can be started.
IKO bearings are suitable for bearing radial and axial combined loads with radial loads. They are usually paired with two sets of bearings, mainly for the front and rear hubs, active bevel gears, differentials, reducers and other transmission parts of the car. .
2. Allowable speed: In the environment with correct installation and good lubrication, it is allowed to be 0.3-0.5 times of the limit speed of the rod end joint bearing. Under normal circumstances, it is best to use 0.2 times the limit speed.
3, allow tilt angle: IKO bearings generally do not allow the shaft to tilt relative to the housing hole, if there is tilt, the maximum does not exceed 2'.
4, allowable temperature: under normal load, and the lubricant has high temperature resistance, and the lubrication is sufficient, the general bearing is allowed to work at -30 ° C -150 ° C ambient temperature.
When the IKO bearing is removed and intended to continue to be used, the appropriate removal tool should be used. To remove the ferrule of the interference fit, only the pulling force can be applied to the ferrule, and the disassembly force is never allowed to pass through the rolling element, otherwise the rolling body and the raceway will be crushed. Lubricants are important not only for bearings but also for all rod ends. However, please note that it is not advisable to add too much grease to the bearings. Then it is to replace the lubricant of the bearing. Bearings lubricated with oil should be refilled with fresh oil and allowed to rotate at low speed for a few minutes if the old oil is drained. As much as possible, allow the oil to collect residual contaminants and then vent the oil. For grease-lubricated bearings, when replacing grease, the cutter used should avoid any contact with the cotton end of the rod end joint bearing. Since these residual fibers may be wedged between the rolling elements and cause damage, especially the application of IKO bearings needs to pay attention to this problem.
