NSK imported bearing operation inspection skills
After the installation of the NSK bearing in Japan, in order to check whether the installation is correct, the operation check is required, and the small machine can be rotated by hand to confirm whether the rotation is smooth. The inspection items have poor running due to foreign matter, scars, and indentations, uneven rotation due to poor installation, poor machining of the mounting seat, excessive torque due to too small clearance, and installation error sealing friction. . If there is no abnormality, the power running can be started.
Since the large machine cannot be rotated manually, the power is turned off immediately after the load is not started, and the inertia operation is performed to check whether there is vibration, sound, whether the rotating parts are in contact, etc., and it is confirmed that there is no abnormality and then enters the power running.
The power running starts from the no-load low speed and slowly increases to the rated condition rated operation. The items to be checked during the test run are whether there is abnormal noise, the temperature of the NSK bearing in Japan, the leakage of the lubricant, and the discoloration. If an abnormality is found during the test run, stop the operation immediately, check the machine, and remove the bearing check if necessary.
Japan NSK imported bearing temperature inspection is generally estimated from the appearance of the outer casing. However, the oil hole is used to directly measure the temperature of the outer ring of the bearing, which is more accurate. The bearing temperature starts to increase gradually. If there is no abnormality, it is usually stable after 1~2 hours. If the bearing or the mounting is defective, the bearing temperature will rise sharply and an abnormally high temperature will occur. The reasons are such as excessive lubricant, too small bearing clearance, poor installation, excessive friction of the sealing device, and the like. In the case of high-speed rotation, the selection of the lubrication method of the bearing is also the cause.
