Bearing installation and maintenance

Time：

Jul 27,2022

Pay attention to key points

From the point of use, the following points should be paid attention to to ensure that the bearing can work reliably:

1, improve the lubrication quality, control the oil pressure, temperature and flow, strengthen the oil filtration.

2, the use of fuel and lubricating oil in line with the regulations.

3. Control the temperature state of the diesel generator set. It is unfavorable to work in the case of supercooling and overheating. In cold weather, the diesel engine should be preheated before starting, and the crankshaft should be turned by hand to make the oil enter the friction surface.

4, bearing and journal surface quality and geometric shape should be strictly guaranteed.

5, bearing clearance to be appropriate, the generator set is too large impact, too small lubrication is poor, may burn tile.

How to ensure that bearings work reliably

Generally speaking, from the point of use, we should pay attention to the following points:

1. Bearing clearance should be appropriate, too large impact, too small lubrication is poor, may burn tile;

2. Bearing and journal surface quality and geometric shape should be strictly guaranteed;

3. Improve lubrication quality, control oil pressure, temperature and flow, strengthen oil filtration;

4. Use fuel oil and lubricating oil in accordance with the regulations.

In order to give full play to bearings and maintain their due performance for a long time, regular maintenance (regular inspection) must be done effectively. Early detection of faults and prevention of accidents through proper regular inspection are very important for improving productivity and economy.

install

Whether the installation of bearings is correct affects the accuracy, life and performance. Therefore, the design and assembly department should fully study the installation of bearings. It is expected to be installed in accordance with operating standards. The items of operating standards are usually as follows:

(1) Clean bearings and bearing related parts

(2) Check the size and finishing of the related parts

(3) Installation

(4) Check after the installation of bearings

(5) Supply lubricant

It is hoped that the bearing packaging will be opened before installation. General grease lubrication, no cleaning, directly fill grease. Lubricating oil lubrication, ordinary do not need to clean, but, instrument or high-speed bearings, to clean with clean oil, remove coated on the bearing rust prevention agent. The bearing with the rust inhibitor removed is easy to rust, so it can not be placed carelessly. Moreover, the bearings that have been sealed in grease can be used directly without cleaning.

The installation method of bearings varies according to the bearing structure, fit and condition. In general, because it is mostly shaft rotation, the inner ring needs interference fit. Cylindrical bore bearing, multi-purpose press into, or multi-purpose hot charging method. The taper hole is installed directly on the taper shaft, or installed with a sleeve.

When installed to the shell, the general clearance is more, the outer ring has interference, usually pressed into, or there is also a cold shrinkage fitting method after cooling installation. With dry ice as coolant, cold shrinkage with installation occasions, moisture in the air will condense on the surface of the bearing. Therefore, appropriate rust prevention measures are needed.

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