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Precautions For Installation of Cylindrical Roller Bearings

Time:2020.04.22  Source:Roller Bearings Suppliers


The split bearing unit includes Cylindrical Roller Bearings, bearing seats, bracket seats and some coupling parts.The bearings, bearing seats and bracket seats are all separated by 180 ° in the axial direction, which is easy to install and remove. It is precisely because of the installation and disassembly of the split bearing, which can effectively save the disassembly time, reduce the production cost, and improve the production efficiency. But the installation also needs some things, otherwise it is easy to cause damage to the split bearing.

 

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1.Bearing seat installation: When installing the split bearing bush, bearing housing and bearing cover, the back of the bearing bush and the hole of the bearing housing should be in good contact. If the requirements of the platform are not met, the bearing housing hole should be used as the benchmark. The split surface of the seat is 0.05 ~0.1mm higher.

2.The contact area between the back of the bearing and the bearing seat: The upper tile should not be less than 40%, the lower tile should not be less than 50%, and the contact area is required to be uniform, and there is no gap between the bottom of the lower tile and both sides. When the bearing bush is subjected to increased pressure,it causes rapid wear. The contact spot between the bearing pad and the bearing seat should be 1 to 2 points / cm².Too little will cause the bearing pad to aggravate the wear, deformation and cracking.

3.Bearing and journal installation: When installing the bearing, attention must be paid to the contact angle and contact point between the bush and the journal. The center angle corresponding to the contact surface between the bearing pad and the journal is called the contact angle. If this angle is too large, it will affect the formation of the lubricating oil film, destroy the lubricating effect, and cause the bearing pad to wear quickly. abrasion.The general contact angle is 60 to 90 degrees. The contact point between the bush and the journal is related to the equipment load, medium load and continuous operation of 2 to 3 points / cm2, heavy load and high-speed operation of equipment 3 to 4 points / cm2, to make the contact angle and contact spot meet the requirements, It is necessary to conduct scraping research. Scrape the lower tile first, then the upper tile, apply a thin layer of red paint on the journal, place the shaft on the bearing pad, and then remove it after one rotation in each of the forward and reverse directions. Where there are marks is uneven, it should be scraped and repeated many times until the distribution of the marks on the bearing bush is even and meets the requirements.

4.Pay attention to the adjustment of bearing clearance during installation, which is generally controlled at 1/1000~ 3/1000 of the shaft diameter, which can be optimized according to equipment load, speed, and oil viscosity.

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Due to the special structure of the split bearing, it is widely used. The most important reason is the convenient installation that replaces the conventional bearing, which is very simple and efficient. Compared with conventional bearings, split bearing accessories are easier to detect. Quickly remove the bearing housing top cover and bearing box, all bearing accessories can be easily visually inspected, and it is convenient to participate in the maintenance phase planning work. It can be seen that, compared with conventional bearings, split bearings can save a lot of testing procedures.For more High Quality Bearings,welcome to visit our Website.

 

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