Installation of large motor bearing what matters needing attention

For large motor bearing choice, must be cautious, large motor is different from the home of small, broken can be replaced, large motor bearing relationship with the performance of the whole machine, must choose the quality of the bearing. Today, the authors mainly introduce the installation of large motor bearing what matters needing attention. A, big plate of the motor base plate, generally is composed of steel plate welding, or by compound, such as beams and channels. Have the overall motor base plate, and block. They help support the motor, and will be passed to the electric motor and static load, on the basis of part and keep the motor and installation size and gap remains the same. Floor before installation should remove grease, remove the antirust paint. Especially in combined with the cement water surface, with the paint and steel brush scrub clean, dry cloth, then it is best to brush a layer of cement slurry. Should pay attention to during the cleaning floor bearing mounting surface and the surface of the stator frame installation if there is a scratch or rust, if found to have similar defects application file and sand paper finishing. The newly installed base of motor for base should have strict requirements, basis should be solid enough, in absorb a certain amount of static load and dynamic load cases, foundation should not produce sink. To prevent motor foundation sinking, generally after the basic water for preloading, preloading weight usually is 1 the weight of the electrical installation. 5 ~ 2. 5 times. Constantly in the process of preloading measuring elevation, observe the sinking, based stops down to stay for installation. When installing 1150 blooming mill motor for example, some steel mills on the basis of preloading, preloading about 2 times of the total weight for motor, foundation subsidence after 48 hours to 2 mm. Second, anchor screw fastening backplane anchor screw to use clean gasoline and other solvents, and check the thread for disorderly buckle and damaged, with a nut screw a try. At the same time, measure the actual length of the holes of anchor bolts and check whether the length of the screw is suitable. Anchor plate should be closely posted on foundation, anchor screw should be vertical and anchor plate. Anchor screw is the most commonly used double didn't screw, installation is convenient, there are also made with t-shaped screw, this kind of structure on the screw from down, put the screw in one glyph of anchor plate hole, then rotate it 900 screw is locking anchor plate. The anchor screw tight before, should be coated with lubricating oil in the thread.