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How to clean and install the 4 bolt flange bearing housings?

454 Published by admin Aug 27,2018

First, cleaning, inspection and insulation pad requirements of 4 bolt flange bearing housings:
1. Cleaning and inspection of bearing bush
Large motor bearings are shipped separately. After unpacking, first remove the upper and lower tiles with the eyebolts and mark them with kerosene. Dry them with a dry cloth and check that all the grooves are clean and there are no residual sand. The tungsten gold layer is not well integrated with the tile body, and the channel and crack are drawn with blisters and other dopants. If it cannot be repaired, re-tangle the tungsten.

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2. Cleaning and inspection of the 4 bolt flange bearing housings
Before the 4 bolt flange bearing housings is installed, it should also be thoroughly cleaned. Scrape the dirt in the inner cavity of the 4 bolt flange bearing housings with a scraper, wipe the dirt with cloth or gasoline to check for cracks and blisters to prevent oil leakage during operation. The joint surface of the bearing cap and the bearing seat, the joint surface of the 4 bolt flange bearing housings 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 4 bolt flange bearing housings 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.

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3, bearing insulation structure
An insulating or metal gasket must be placed 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 4 bolt flange bearing housings can be made of a rubber plate having a thickness of 1 to 2 mm. After the insulation of the bearing housing is installed, the insulation resistance to ground should be checked. The resistance should be measured with a 500 volt megger and the resistance should be no less than 1 megohm.

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Second installation
Both the individual motor bearings and the multi-bearings of the unit should be mounted on the main longitudinal axis of the coupled machine or on the longitudinal axis of the unit. The center of the bearing is measured by means of hanging wire and wire hammer. (A wooden strip is stuck inside the bearing arc, and a thin iron bar is nailed in the center of the wooden strip to mark the center position).
Adjust the position of the shaft in the seat, starting from the 4 bolt flange bearing housings on the far side, and check the level of these planes with a level gauge on the bearing seat. Use the theodolite or level to check whether the planes of several axle seats are in the same horizontal plane, and use the hammer or other methods to find out whether the center of each bearing is on the same axis.

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In the process of adjusting the 4 bolt flange bearing housings according to the above method, in the process of eliminating the deviation, the utility model is applied to the jack type tool to move the 4 bolt flange bearing housings, and the method of impacting and hammering is not adopted. The accuracy error of adjusting the bearing housing by this method is about 0.5~1.0 mm. It should be pointed out that the installation adjustment of the 4 bolt flange bearing housings are only pre-adjustment, and it is also adjusted when centering to achieve the requirement of the same axis. After the 4 bolt flange bearing housings are pre-adjusted, just tighten the screws evenly (tightly cycled diagonally), and the insulating sleeve and the stud can be temporarily placed, and then the centering work is completed or released before the test.

If you want to buy the 4 bolt flange bearing housings or any other bearings,please contact me!

Contact: Miya
Email: ntn@zyslbearing.com
Skype: ntn@zyslbearing.com
MP/Whatsapp: +8618363031398
Wechat:18363031398

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