Cleaning and cleaning of large motor housings
Cleaning and cleaning of large motor housings usually requires three details:
1. Cleaning and inspection of bearing bush
Large motor bearings are shipped separately. After unpacking, use the eyebolts to pry the upper and lower tiles separately and mark them with kerosene. Dry them with a dry cloth and check that all the grooves are clean and forged. Sand, tungsten gold layer and tile body are not well combined, the channel and crack are drawn, there are sand holes and other dopants, etc.). If it cannot be repaired, re-tangle the tungsten.
2, the bearing seat cleaning and inspection
Before the bearing housing is installed, it should also be thoroughly cleaned. Scrape the dirt in the inner cavity of the bearing housing with a scraper, wipe the dirt with cloth or gasoline to see if there are any cracks or blisters to prevent oil leakage during operation. The joint surface of the bearing cap and the bearing seat, the joint surface of the bearing seat and the bearing oil retaining ring shall be ground and scraped and checked with a feeler gauge, and the gap shall not exceed 0.03 mm. The surface of the bottom plate on which the bearing housing is placed should also be cleaned and free from bumps, rust and burrs. The screws that secure the housing and the thread of the seat plate should be inspected carefully, and the screws should be tested to check if they are too tight or bald.
3, bearing insulation structure
An insulating or metal gasket must be used between the bearing and the bottom plate. The metal gasket is used to adjust the horizontal position of the seat. To adjust the relative position of the motor and the other motor or machine that is connected. The metal gasket is made of a thin metal plate of 0.08 to 3 mm. The insulating mat is made of a cloth laminate or a glass laminate. The purpose of placing the insulating mat is to prevent the damage of the shaft current. The insulating pad should be 5~10 mm wider than each side of the bearing housing and 3~10 mm thick. In addition to placing an insulating spacer between the bearing and the base plate, the screws and studs should also be insulated. The insulating gasket is made of a glass cloth plate with a thickness of 2 to 5 mm, and its outer diameter is 4 to 5 mm larger than the outer diameter of the iron gasket. The tubing gasket insulating mat that is connected to the bearing housing can be made of a rubber plate having a thickness of 1 to 2 mm. After the insulated bearing housing is installed, the insulation resistance to ground should be checked and measured with a 500 volt megohmmeter. The resistance should be no less than 1 megohm.
