How to install the housing of a large motor

Installation method for large motor bearing housing:

(1), the foot screw:

1. The screw that fastens the bottom plate should be cleaned with a solvent such as gasoline, and check the thread for any clasp and damage. Try it with a nut. Also measure the actual length of the screw hole and check whether the length of the screw is appropriate. The anchor plate should be in close contact with the foundation, and the anchor screw should be perpendicular to the anchor plate.

2, the most common screw for the foot screw is double screw, which is convenient to install, and also has a screw with a T-shaped shape. The screw of this structure is put down from the top, and the screw is placed in the in-line hole of the anchor plate. Then, rotate the 900 screw to be locked by the anchor plate. Before the anchor screw is tightened, the thread should be pre-applied with lubricant.

(B), the bottom plate:

The bottom plate of a large motor is usually welded by steel plates or welded by I-beam and channel steel.
The bottom plate of the motor is integral and also has a block. Their role is to support the motor and transfer the dynamic and static load of the motor to the foundation, keeping the motor and part of the mounting dimensions and clearance constant.

1. Remove oil from the bottom plate before installation and remove the anti-rust paint. Especially in the joint surface with cement, it should be cleaned with paint and steel brush, then wiped with a cloth, it is best to pre-brush a layer of cement slurry.

2. In the cleaning of the bottom plate, pay attention to whether the bearing seat mounting surface and the stator base mounting surface are scratched or rusted. If similar defects are found, apply 锉 and sandpaper trimming.

3. The newly installed motor bottom plate must have strict requirements on the foundation. The foundation should be solid enough. Under certain static and dynamic loads, the foundation should not sink. In order to prevent the foundation of the motor from sinking, it is generally pre-pressed after the foundation is poured. The preloading weight is usually 1.5 to 2.5 times the weight of the motor. During the pre-pressing process, the elevation is continuously measured, and the sinking situation is observed, and the installation can be performed after the foundation stops sinking. For example, a steel mill pre-presses the foundation when installing the 1150 roughing mill motor. The preloading weight is about twice the total weight of the motor. After 48 hours, the foundation sinks to 2 mm.